Two-liquid liquid resin composition and power module

Abstract

A two-component liquid resin composition is disclosed, comprising a first liquid and a second liquid. The first liquid contains epoxy resin (A), inorganic filler (C), and anti-settling agent (D). The second liquid contains acid anhydride (B), inorganic filler (C), and anti-settling agent (D). The anti-settling agent (D) contains an inorganic thickener (but does not include the inorganic filler (C)). The viscosity η of the first liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5A The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

Description

Technical Field

[0001] This invention relates to a two-component liquid resin composition and a power module. Background Technology

[0002] Epoxy resin is used as a sealing material to seal the substrate and semiconductor components in power modules.

[0003] As for the technology related to sealing materials used in power modules, the technology described in Patent Document 1 can be cited as an example.

[0004] In Patent Document 1, the technical problem to be solved is to provide a semiconductor sealant filler that can be incorporated into a sealing material to reduce the coefficient of linear expansion of the sealing material and maintain the sealing material at a low viscosity to improve invasiveness, and a semiconductor sealant composition using the filler. The document describes a semiconductor sealant filler and a semiconductor sealant containing the filler and an epoxy resin. The semiconductor sealant filler is characterized by comprising an inorganic material and an organic layer, wherein the organic layer is chemically bonded to the surface of the inorganic material and has functional groups capable of reacting with the epoxy resin.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2009-67890 Summary of the Invention

[0008] The technical problem that the invention aims to solve

[0009] This invention provides a two-component liquid resin composition with improved balance between storage stability and flowability.

[0010] Means for solving technical problems

[0011] To address the aforementioned technical problems, the inventors conducted repeated and in-depth research. The results showed that by including an inorganic thickener as an anti-settling agent and adjusting the viscosity of the epoxy resin-containing liquid resin composition in a two-component liquid resin composition to a specific range, or by including a dispersant as an anti-settling agent and adjusting the viscosity of the epoxy resin-containing liquid resin composition in a two-component liquid resin composition to a specific range, or by including both epoxy resin and an anti-settling agent and adjusting the viscosity of the epoxy resin-containing liquid resin composition in a two-component liquid resin composition to a specific range, the balance between the storage stability and flowability of the two-component liquid resin composition can be improved, thus completing this invention.

[0012] According to a first embodiment of the present invention, a two-component liquid resin composition and a power module are provided as shown below.

[0013] [1a]

[0014] A two-component liquid resin composition, characterized in that:

[0015] The two-component liquid resin composition is a two-component liquid resin composition consisting of a first liquid and a second liquid.

[0016] The first liquid contains epoxy resin (A), inorganic filler (C), and anti-settling agent (D).

[0017] The second liquid contains acid anhydride (B), inorganic filler material (C), and anti-settling agent (D).

[0018] The anti-settling agent (D) contains an inorganic thickener, but the inorganic thickener does not include the inorganic filler material (C).

[0019] The viscosity η of the first liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5A The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

[0020] [2a]

[0021] According to the two-component liquid resin composition described above [1a], the viscosity η of the first liquid is measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10A The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

[0022] [3a]

[0023] According to the two-component liquid resin composition described above [2a], the characteristic is that: the viscosity η 5A Relative to the viscosity η 10A viscosity ratio of Ti A (η) 5A / η 10A () is above 0.1 and below 1.5.

[0024] [4a]

[0025] The two-component liquid resin composition according to any one of [1a] to [3a] above is characterized in that: the viscosity η of the second liquid is measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5B The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

[0026] [5a]

[0027] According to the two-component liquid resin composition described above [4a], the viscosity η of the second liquid is measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10B The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

[0028] [6a]

[0029] According to the two-component liquid resin composition described above [5a], the characteristic is that: the viscosity η 5B Relative to the viscosity η 10B viscosity ratio of Ti B (η) 5B / η 10B () is above 0.5 and below 2.5.

[0030] [7a]

[0031] The two-component liquid resin composition according to any one of [1a] to [6a] above is characterized in that: the viscosity η of the mixture of the first liquid and the second liquid is measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5P The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

[0032] [8a]

[0033] According to the two-component liquid resin composition described above [7a], the viscosity η of the mixture of the first liquid and the second liquid is measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10P The range is 10.0 Pa·s or higher and 50.0 Pa·s or lower.

[0034] [9a]

[0035] According to the two-component liquid resin composition described above [8a], the characteristic is that: the viscosity η 5P Relative to the viscosity η 10P viscosity ratio of Ti P (η) 5P / η 10P () is above 0.5 and below 2.0.

[0036] [10a]

[0037] The two-component liquid resin composition according to any one of [1a] to [9a] above is characterized in that: the inorganic thickener contains one or more selected from layered inorganic minerals and nano-silica.

[0038] [11a]

[0039] According to the two-component liquid resin composition described above [10a], the layered inorganic mineral contains one or more selected from clay and talc.

[0040] [12a]

[0041] The two-component liquid resin composition according to any one of [1a] to [11a] above is characterized in that: when the total content of the two-component liquid resin composition is set to 100% by mass, the content of the anti-settling agent (D) is 0.01% by mass or more and 2.00% by mass or less.

[0042] [13a]

[0043] The two-component liquid resin composition according to any one of [1a] to [12a] above is characterized in that: the epoxy resin (A) contains an alicyclic epoxy resin.

[0044] [14a]

[0045] According to the two-component liquid resin composition described above [13a], the characteristic is that when the content of the epoxy resin (A) is set to 100 parts by mass, the content of the alicyclic epoxy resin is more than 50 parts by mass and less than 100 parts by mass.

[0046] [15a]

[0047] The two-component liquid resin composition according to any one of [1a] to [14a] above is characterized in that: when the total content of the two-component liquid resin composition is set to 100% by mass, the content of the epoxy resin (A) is more than 5% by mass and less than 30% by mass.

[0048] [16a]

[0049] The two-component liquid resin composition according to any one of [1a] to [15a] above is characterized in that: the anhydride (B) contains one or more selected from methyl-5-norbornene-2,3-dicarboxylic anhydride, methylcyclohexane-1,2-dicarboxylic anhydride and methyltetrahydrophthalic anhydride.

[0050] [17a]

[0051] The two-component liquid resin composition according to any one of [1a] to [16a] above is characterized in that: when the total content of the two-component liquid resin composition is set to 100% by mass, the content of the acid anhydride (B) is 5% by mass or more and 20% by mass or less.

[0052] [18a]

[0053] The two-component liquid resin composition according to any one of [1a] to [17a] above is characterized in that: the inorganic filler material (C) contains one or more selected from silicon dioxide, aluminum oxide, aluminum hydroxide and calcium carbonate.

[0054] [19a]

[0055] The two-component liquid resin composition according to any one of [1a] to [18a] above is characterized in that: the average particle size D of the inorganic filler material (C) when the cumulative value of the volume frequency particle size distribution measured by laser diffraction scattering method is 50% is... 50 The range is from 0.5μm to 100.0μm.

[0056] [20a]

[0057] The two-component liquid resin composition according to any one of [1a] to [19a] above is characterized in that: when the total content of the two-component liquid resin composition is set to 100% by mass, the content of the inorganic filler material (C) is 65% by mass or more and 85% by mass or less.

[0058] [21a]

[0059] The two-component liquid resin composition according to any one of [1a] to [20a] above is characterized in that it further contains a curing accelerator (E).

[0060] [22a]

[0061] According to the two-component liquid resin composition described above [21a], the curing accelerator (E) contains one or more selected from tertiary amines, quaternary ammonium salts, imidazoles, organophosphorus compounds and Lewis acid catalysts.

[0062] [23a]

[0063] According to the two-component liquid resin composition described in [21a] or [22a] above, the characteristic is that when the total content of the two-component liquid resin composition is set to 100% by mass, the content of the curing accelerator (E) is more than 0.01% by mass and less than 1.00% by mass.

[0064] [24a]

[0065] The two-component liquid resin composition according to any one of [1a] to [23a] above is characterized in that: the two-component liquid resin composition can be used to seal a power module by casting, the power module comprising: a power module substrate including a circuit layer; and a power semiconductor element located on the circuit layer of the power module substrate.

[0066] [25a]

[0067] A power module, characterized in that it comprises:

[0068] A power module substrate containing a circuit layer;

[0069] Power semiconductor elements located on the circuit layer of the substrate for the power module; and

[0070] A sealing material used to seal the power module substrate and the power semiconductor element.

[0071] The sealing material contains a cured product of the two-component liquid resin composition described in any one of [1a] to [24a] above.

[0072] [26a]

[0073] According to the power module described above [25a], the power semiconductor element comprises one or more selected from MOS transistors and insulated gate bipolar transistors (IGBTs).

[0074] According to a second embodiment of the present invention, a two-component liquid resin composition and a power module are provided as shown below.

[0075] [1b]

[0076] A two-component liquid resin composition, characterized in that:

[0077] The two-component liquid resin composition is a two-component liquid resin composition consisting of a first liquid and a second liquid.

[0078] The first liquid contains epoxy resin (A), inorganic filler (C), and anti-settling agent (D).

[0079] The second liquid contains acid anhydride (B), inorganic filler material (C), and anti-settling agent (D).

[0080] The anti-settling agent (D) contains a dispersant.

[0081] The viscosity η of the first liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5A The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

[0082] [2b]

[0083] According to the two-component liquid resin composition described in [1b] above, the viscosity η of the first liquid is measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10A The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

[0084] [3b]

[0085] According to the two-component liquid resin composition described in [2b] above, the characteristic is that: the viscosity η 5A Relative to the viscosity η 10A viscosity ratio of Ti A (η) 5A / η 10A The value is between 0.4 and 1.5.

[0086] [4b]

[0087] The two-component liquid resin composition according to any one of [1b] to [3b] above is characterized in that: the viscosity η of the second liquid is measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5B The range is 1.0 Pa·s or higher and 70.0 Pa·s or lower.

[0088] [5b]

[0089] According to the two-component liquid resin composition described above [4b], the viscosity η of the second liquid is measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10B The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

[0090] [6b]

[0091] According to the two-component liquid resin composition described above [5b], the characteristic is that: the viscosity η 5B Relative to the viscosity η 10B viscosity ratio of Ti B (η) 5B / η 10B () is above 0.5 and below 4.0.

[0092] [7b]

[0093] The two-component liquid resin composition according to any one of [1b] to [6b] above is characterized in that: the viscosity η of the mixture of the first liquid and the second liquid is measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5P The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

[0094] [8b]

[0095] According to the two-component liquid resin composition described above [7b], the viscosity η of the mixture of the first liquid and the second liquid is measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10P The range is 10.0 Pa·s or higher and 50.0 Pa·s or lower.

[0096] [9b]

[0097] According to the two-component liquid resin composition described above [8b], the characteristic is that: the viscosity η 5P Relative to the viscosity η 10P viscosity ratio of Ti P (η) 5P / η 10P () is above 0.5 and below 2.0.

[0098] [10b]

[0099] The two-component liquid resin composition according to any one of [1b] to [9b] ​​above is characterized in that: the dispersant contains an ester compound comprising a long-chain hydrocarbon group.

[0100] [11b]

[0101] According to the two-component liquid resin composition described above [10b], the ester compound containing long-chain hydrocarbon groups contains one or more selected from polyhydroxycarboxylic acid esters, acidic phosphate esters, and polymer modifiers containing carboxyl groups.

[0102] [12b]

[0103] The two-component liquid resin composition according to any one of [1b] to [11b] above is characterized in that: when the total content of the two-component liquid resin composition is set to 100% by mass, the content of the anti-settling agent (D) is 0.01% by mass or more and 2.0% by mass or less.

[0104] [13b]

[0105] The two-component liquid resin composition according to any one of [1b] to [12b] above is characterized in that: the epoxy resin (A) contains an alicyclic epoxy resin.

[0106] [14b]

[0107] According to the two-component liquid resin composition described above [13b], the content of the epoxy resin (A) is 50 parts by mass or more and 100 parts by mass or less when the content of the epoxy resin (A) is set to 100 parts by mass.

[0108] [15b]

[0109] The two-component liquid resin composition according to any one of [1b] to [14b] above is characterized in that: when the total content of the two-component liquid resin composition is set to 100% by mass, the content of the epoxy resin (A) is more than 5% by mass and less than 30% by mass.

[0110] [16b]

[0111] The two-component liquid resin composition according to any one of [1b] to [15b] above is characterized in that: the anhydride (B) contains one or more selected from methyl-5-norbornene-2,3-dicarboxylic anhydride, methylcyclohexane-1,2-dicarboxylic anhydride and methyltetrahydrophthalic anhydride.

[0112] [17b]

[0113] The two-component liquid resin composition according to any one of [1b] to [16b] above is characterized in that: when the total content of the two-component liquid resin composition is set to 100% by mass, the content of the acid anhydride (B) is more than 5% by mass and less than 20% by mass.

[0114] [18b]

[0115] The two-component liquid resin composition according to any one of [1b] to [17b] above is characterized in that: the inorganic filler material (C) contains one or more selected from silicon dioxide, aluminum oxide, aluminum hydroxide and calcium carbonate.

[0116] [19b]

[0117] The two-component liquid resin composition according to any one of [1b] to [18b] above is characterized in that: the average particle size D of the inorganic filler material (C) when the cumulative value of the volume frequency particle size distribution measured by laser diffraction scattering method is 50% is... 50 The range is from 0.5μm to 100μm.

[0118] [20b]

[0119] The two-component liquid resin composition according to any one of [1b] to [19b] above is characterized in that: when the total content of the two-component liquid resin composition is set to 100% by mass, the content of the inorganic filler material (C) is 65% by mass or more and 85% by mass or less.

[0120] [21b]

[0121] The two-component liquid resin composition according to any one of [1b] to [20b] above is characterized in that it further contains a curing accelerator (E).

[0122] [22b]

[0123] According to the two-component liquid resin composition described above [21b], the curing accelerator (E) contains one or more selected from tertiary amines, quaternary ammonium salts, imidazoles, organophosphorus compounds and Lewis acid catalysts.

[0124] [23b]

[0125] According to the two-component liquid resin composition described in [21b] or [22b] above, the content of the curing accelerator (E) is 0.01% to 1.00% by mass when the total content of the two-component liquid resin composition is 100% by mass.

[0126] [24b]

[0127] The two-component liquid resin composition according to any one of [1b] to [23b] above is characterized in that: the two-component liquid resin composition can be used to seal a power module by casting, the power module comprising: a power module substrate including a circuit layer; and a power semiconductor element located on the circuit layer of the power module substrate.

[0128] [25b]

[0129] A power module, characterized in that it comprises:

[0130] A power module substrate containing a circuit layer;

[0131] Power semiconductor elements located on the circuit layer of the substrate for the power module; and

[0132] A sealing material used to seal the power module substrate and the power semiconductor element.

[0133] The sealing material contains a cured product of the two-component liquid resin composition described in any one of [1b] to [24b] above.

[0134] [26b]

[0135] According to the power module described above [25b], the power semiconductor element comprises one or more selected from MOS transistors and insulated gate bipolar transistors (IGBTs).

[0136] According to a third embodiment of the present invention, a two-component liquid resin composition and a power module are provided as shown below.

[0137] [1c]

[0138] A two-component liquid resin composition, characterized in that:

[0139] The two-component liquid resin composition is a two-component liquid resin composition consisting of a first liquid and a second liquid.

[0140] The first liquid contains epoxy resin (A), inorganic filler (C), and anti-settling agent (D).

[0141] The second liquid contains acid anhydride (B), inorganic filler material (C), and anti-settling agent (D).

[0142] The viscosity η of the first liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 60°C. 5A The value is above 1.0 Pa·s and below 15.0 Pa·s.

[0143] [2c]

[0144] According to the two-component liquid resin composition described in [1c] above, the viscosity η of the first liquid is measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 60°C. 10A The value is above 1.0 Pa·s and below 15.0 Pa·s.

[0145] [3c]

[0146] According to the two-component liquid resin composition described in [2c] above, the characteristic is that: the viscosity η 5A Relative to the viscosity η 10A viscosity ratio of Ti A (η) 5A / η 10A () is above 0.1 and below 1.5.

[0147] [4c]

[0148] The two-component liquid resin composition according to any one of [1c] to [3c] above is characterized in that: the viscosity η of the second liquid is measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5B The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

[0149] [5c]

[0150] According to the two-component liquid resin composition described above [4c], the viscosity η of the second liquid is measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10B The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

[0151] [6c]

[0152] According to the two-component liquid resin composition described above [5c], the characteristic is that: the viscosity η 5B Relative to the viscosity η 10B viscosity ratio of Ti B (η) 5B / η 10B () is above 0.5 and below 2.5.

[0153] [7c]

[0154] The two-component liquid resin composition according to any one of [1c] to [6c] above is characterized in that: the viscosity η of the mixture of the first liquid and the second liquid is measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 60°C. 5P The range is 1.0 Pa·s or higher and 30.0 Pa·s or lower.

[0155] [8c]

[0156] According to the two-component liquid resin composition described above [7c], the viscosity η of the mixture of the first liquid and the second liquid is measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 60°C. 10P The range is 1.0 Pa·s or higher and 30.0 Pa·s or lower.

[0157] [9c]

[0158] According to the two-component liquid resin composition described in [8c] above, the characteristic is that: the viscosity η 5P Relative to the viscosity η 10P viscosity ratio of Ti P (η) 5P / η10P () is above 0.5 and below 2.0.

[0159] [10c]

[0160] The two-component liquid resin composition according to any one of [1c] to [9c] above is characterized in that: the anti-settling agent (D) contains an inorganic thickener (but does not include the inorganic filler material (C)).

[0161] [11c]

[0162] According to the two-component liquid resin composition described above [10c], the inorganic thickener contains layered inorganic minerals.

[0163] [12c]

[0164] According to the two-component liquid resin composition described above [11c], the layered inorganic mineral contains one or more selected from clay and talc.

[0165] [13c]

[0166] The two-component liquid resin composition according to any one of [1c] to [12c] above is characterized in that: when the total content of the two-component liquid resin composition is set to 100% by mass, the content of the anti-settling agent (D) is more than 0.01% by mass and less than 2.00% by mass.

[0167] [14c]

[0168] The two-component liquid resin composition according to any one of [1c] to [13c] above is characterized in that: when the total content of the two-component liquid resin composition is set to 100% by mass, the content of the epoxy resin (A) is more than 3% by mass and less than 30% by mass.

[0169] [15c]

[0170] The two-component liquid resin composition according to any one of [1c] to [14c] above is characterized in that: the anhydride (B) contains one or more selected from methyl-5-norbornene-2,3-dicarboxylic anhydride, methylcyclohexane-1,2-dicarboxylic anhydride and methyltetrahydrophthalic anhydride.

[0171] [16c]

[0172] The two-component liquid resin composition according to any one of [1c] to [15c] above is characterized in that: when the total content of the two-component liquid resin composition is set to 100% by mass, the content of the acid anhydride (B) is more than 5% by mass and less than 20% by mass.

[0173] [17c]

[0174] The two-component liquid resin composition according to any one of [1c] to [16c] above is characterized in that: the inorganic filler material (C) contains one or more selected from silicon dioxide, aluminum oxide, aluminum hydroxide and calcium carbonate.

[0175] [18c]

[0176] The two-component liquid resin composition according to any one of [1c] to [17c] above is characterized in that: the average particle size D of the inorganic filler material (C) when the cumulative value of the volume frequency particle size distribution measured by laser diffraction scattering method is 50% is... 50 The range is from 0.5μm to 100μm.

[0177] [19c]

[0178] The two-component liquid resin composition according to any one of [1c] to [18c] above is characterized in that: when the total content of the two-component liquid resin composition is set to 100% by mass, the content of the inorganic filler material (C) is 65% by mass or more and 85% by mass or less.

[0179] [20c]

[0180] The two-component liquid resin composition according to any one of [1c] to [19c] above is characterized in that it further contains a curing accelerator (E).

[0181] [21c]

[0182] According to the two-component liquid resin composition described above [20c], the curing accelerator (E) contains one or more selected from tertiary amines, quaternary ammonium salts, imidazoles, organophosphorus compounds, and Lewis acid catalysts.

[0183] [22c]

[0184] According to the two-component liquid resin composition described in [20c] or [21c] above, the characteristic is that when the total content of the two-component liquid resin composition is set to 100% by mass, the content of the curing accelerator (E) is more than 0.01% by mass and less than 1.00% by mass.

[0185] [23c]

[0186] The two-component liquid resin composition according to any one of [1c] to [22c] above is characterized in that: the two-component liquid resin composition can be used to seal a power module by casting, the power module comprising: a power module substrate including a circuit layer; and a power semiconductor element located on the circuit layer of the power module substrate.

[0187] [24c]

[0188] A power module, characterized in that it comprises:

[0189] A power module substrate containing a circuit layer;

[0190] Power semiconductor elements located on the circuit layer of the substrate for the power module; and

[0191] A sealing material used to seal the power module substrate and the power semiconductor element.

[0192] The sealing material contains a cured product of the two-component liquid resin composition described in any one of [1c] to [23c] above.

[0193] [25c]

[0194] According to the power module described in [24c] above, the power semiconductor element comprises one or more selected from MOS transistors and insulated gate bipolar transistors (IGBTs).

[0195] Invention Effects

[0196] According to the first to third embodiments of the present invention, it is possible to provide a two-component liquid resin composition with improved performance balance between preservation stability and flowability, and a power module using the above-described two-component liquid resin composition. Detailed Implementation

[0197] The embodiments of the present invention will be described below.

[0198] In addition, in this specification, the numerical range indicated by "~" represents a range that includes the values ​​before and after "~" as minimum and maximum values, respectively. In the numerical ranges described in stages in this specification, the upper or lower limit of a certain stage's numerical range can be arbitrarily combined with the upper or lower limit of another stage's numerical range. In the numerical ranges described in this specification, the upper or lower limit can be replaced with the values ​​shown in the examples. "A or B" can include either A or B, or both. Regarding the materials exemplified in this specification, unless otherwise specified, one or more can be used alone or in combination. In this specification, regarding the content of each component in the composition, if multiple substances corresponding to each component are present in the composition, unless otherwise specified, it refers to the total amount of those multiple substances present in the composition. In this specification, the statement "when the entire two-component liquid resin composition (or the first and second liquids) is set to 100% by mass" refers to excluding solvents and other components that evaporate during the curing of the two-component liquid resin composition.

[0199] <First Implementation>

[0200] [Two-component liquid resin composition]

[0201] The first embodiment of the two-component liquid resin composition is a two-component liquid resin composition consisting of a first liquid and a second liquid. The first liquid contains epoxy resin (A), inorganic filler (C), and anti-settling agent (D). The second liquid contains acid anhydride (B), inorganic filler (C), and anti-settling agent (D). The anti-settling agent (D) contains an inorganic thickener (but does not include the inorganic filler (C)). The viscosity η of the first liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5A The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

[0202] The two-component liquid resin composition of the first embodiment, by satisfying the above-described configuration, can improve the performance balance between storage stability and flowability.

[0203] It can be considered that in the two-component liquid resin composition of the first embodiment, specific components in the first and second liquids of the two-component liquid resin composition help maintain a preferred dispersion state of the inorganic filler (C) in the first and second liquids. Furthermore, it can be considered that when the viscosity η of the first liquid... 5AWithin the aforementioned numerical range, from the viewpoint of preservation stability, the fluidity of the first liquid at rest becomes appropriate, and the sedimentation of the inorganic filler material (C) in the first liquid can be physically suppressed. As a result, it can be considered that the two-liquid liquid resin composition of the first embodiment can achieve a balance between improving the preservation stability in both the first and second liquid states and the fluidity suitable for casting operations.

[0204] In the two-component liquid resin composition of the first embodiment, from the viewpoint of further improving the performance balance between the storage stability and flowability of the two-component liquid resin composition, the above-mentioned viscosity η 5A Preferably, the pressure is 3.0 Pa·s or more, more preferably 5.0 Pa·s or more, even more preferably 8.0 Pa·s or more, and preferably 40.0 Pa·s or less, more preferably 30.0 Pa·s or less, and even more preferably 25.0 Pa·s or less.

[0205] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the first embodiment is... 5A Preferably, the pressure is 3.0 Pa·s or more and 40.0 Pa·s or less; more preferably, 5.0 Pa·s or more and 30.0 Pa·s or less; and even more preferably, 8.0 Pa·s or more and 25.0 Pa·s or less.

[0206] The viscosity η of the two-component liquid resin composition of the first embodiment is as described above. 5A This refers to the viscosity one minute after the conical rotor of the E-type viscometer begins to rotate.

[0207] In the two-component liquid resin composition of the first embodiment, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the first liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10A Preferably, the pressure is 1.0 Pa·s or more, more preferably 3.0 Pa·s or more, even more preferably 5.0 Pa·s or more, even more preferably 8.0 Pa·s or more, and preferably 50.0 Pa·s or less, more preferably 40.0 Pa·s or less, and even more preferably 30.0 Pa·s or less.

[0208] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the first embodiment is... 10APreferably, the pressure is 1.0 Pa·s or more and 50.0 Pa·s or less; more preferably, 3.0 Pa·s or more and 50.0 Pa·s or less; even more preferably, 5.0 Pa·s or more and 40.0 Pa·s or less; and even more preferably, 8.0 Pa·s or more and 30.0 Pa·s or less.

[0209] The viscosity η of the two-component liquid resin composition of the first embodiment is as described above. 10A This refers to the viscosity one minute after the conical rotor of the E-type viscometer begins to rotate.

[0210] In the two-component liquid resin composition of the first embodiment, from the viewpoint of further improving the performance balance between the storage stability and flowability of the two-component liquid resin composition, the above-mentioned viscosity η 5A Relative to the above viscosity η 10A viscosity ratio of Ti A (η) 5A / η 10A The value is preferably 0.1 or more, more preferably 0.3 or more, even more preferably 0.5 or more, even more preferably 0.8 or more, and preferably 1.5 or less, more preferably 1.3 or less, and even more preferably 1.1 or less.

[0211] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity ratio of the two-component liquid resin composition of the first embodiment to Ti is... A (η) 5A / η 10A The value is preferably 0.1 to 1.5, more preferably 0.3 to 1.5, even more preferably 0.5 to 1.3, and even more preferably 0.8 to 1.1.

[0212] In the two-component liquid resin composition of the first embodiment, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the second liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5B Preferably, the pressure is 1.0 Pa·s or more, more preferably 5.0 Pa·s or more, even more preferably 10.0 Pa·s or more, even more preferably 15.0 Pa·s or more, even more preferably 20.0 Pa·s or more, and preferably 50.0 Pa·s or less, more preferably 45.0 Pa·s or less, even more preferably 40.0 Pa·s or less, even more preferably 35.0 Pa·s or less, and even more preferably 30.0 Pa·s or less.

[0213] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the first embodiment is... 5B Preferably, the pressure is 1.0 Pa·s or more and 50.0 Pa·s or less; more preferably, 5.0 Pa·s or more and 45.0 Pa·s or less; even more preferably, 10.0 Pa·s or more and 40.0 Pa·s or less; even more preferably, 15.0 Pa·s or more and 35.0 Pa·s or less; even more preferably, 20.0 Pa·s or more and 30.0 Pa·s or less.

[0214] The viscosity η of the two-component liquid resin composition of the first embodiment is as described above. 5B This refers to the viscosity one minute after the conical rotor of the E-type viscometer begins to rotate.

[0215] In the two-component liquid resin composition of the first embodiment, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the second liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10B Preferably, the pressure is 1.0 Pa·s or more, more preferably 3.0 Pa·s or more, even more preferably 5.0 Pa·s or more, even more preferably 10.0 Pa·s or more, even more preferably 15.0 Pa·s or more, and preferably 50.0 Pa·s or less, more preferably 45.0 Pa·s or less, even more preferably 40.0 Pa·s or less, even more preferably 35.0 Pa·s or less, even more preferably 30.0 Pa·s or less, even more preferably 25.0 Pa·s or less.

[0216] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the first embodiment is... 10B Preferably, the pressure is 1.0 Pa·s or more and 50.0 Pa·s or less; more preferably, 1.0 Pa·s or more and 45.0 Pa·s or less; even more preferably, 3.0 Pa·s or more and 40.0 Pa·s or less; even more preferably, 5.0 Pa·s or more and 35.0 Pa·s or less; even more preferably, 10.0 Pa·s or more and 30.0 Pa·s or less; even more preferably, 15.0 Pa·s or more and 25.0 Pa·s or less.

[0217] The viscosity η of the two-component liquid resin composition of the first embodiment is as described above. 10B This refers to the viscosity one minute after the conical rotor of the E-type viscometer begins to rotate.

[0218] In the two-component liquid resin composition of the first embodiment, from the viewpoint of further improving the performance balance between the storage stability and flowability of the two-component liquid resin composition, the above-mentioned viscosity η 5B Relative to the above viscosity η 10B viscosity ratio of Ti B (η) 5B / η 10B The value is preferably 0.5 or more, more preferably 0.8 or more, even more preferably 1.0 or more, and preferably 2.5 or less, more preferably 2.2 or less, even more preferably 2.0 or less, even more preferably 1.7 or less, and even more preferably 1.5 or less.

[0219] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity ratio of the two-component liquid resin composition of the first embodiment to Ti is... B (η) 5B / η 10B The value is preferably 0.5 to 2.5, more preferably 0.5 to 2.2, even more preferably 0.5 to 2.0, even more preferably 0.8 to 1.7, and even more preferably 1.0 to 1.5.

[0220] In the two-component liquid resin composition of the first embodiment, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the mixture of the first liquid and the second liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5P Preferably, the pressure is 1.0 Pa·s or more, more preferably 5.0 Pa·s or more, even more preferably 10.0 Pa·s or more, even more preferably 15.0 Pa·s or more, even more preferably 20.0 Pa·s or more, and preferably 50.0 Pa·s or less, more preferably 45.0 Pa·s or less, even more preferably 40.0 Pa·s or less, and even more preferably 35.0 Pa·s or less.

[0221] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the first embodiment is... 5P Preferably, the pressure is 1.0 Pa·s or more and 50.0 Pa·s or less; more preferably, 5.0 Pa·s or more and 50.0 Pa·s or less; even more preferably, 10.0 Pa·s or more and 45.0 Pa·s or less; even more preferably, 15.0 Pa·s or more and 40.0 Pa·s or less; even more preferably, 20.0 Pa·s or more and 35.0 Pa·s or less.

[0222] The viscosity η of the two-component liquid resin composition of the first embodiment is as described above. 5P This refers to the viscosity one minute after the conical rotor of the E-type viscometer begins to rotate.

[0223] In the two-component liquid resin composition of the first embodiment, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the mixture of the first liquid and the second liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10P Preferably, the pressure is 10.0 Pa·s or more, more preferably 12.0 Pa·s or more, even more preferably 14.0 Pa·s or more, even more preferably 16.0 Pa·s or more, even more preferably 18.0 Pa·s or more, even more preferably 20.0 Pa·s or more, even more preferably 21.0 Pa·s or more, and preferably 50.0 Pa·s or less, more preferably 45.0 Pa·s or less, even more preferably 40.0 Pa·s or less, even more preferably 35.0 Pa·s or less, even more preferably 30.0 Pa·s or less.

[0224] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the first embodiment is... 10P Preferably, the pressure is 10.0 Pa·s or more and 50.0 Pa·s or less; more preferably, 12.0 Pa·s or more and 50.0 Pa·s or less; even more preferably, 14.0 Pa·s or more and 50.0 Pa·s or less; even more preferably, 16.0 Pa·s or more and 45.0 Pa·s or less; even more preferably, 18.0 Pa·s or more and 40.0 Pa·s or less; even more preferably, 20.0 Pa·s or more and 35.0 Pa·s or less; even more preferably, 21.0 Pa·s or more and 30.0 Pa·s or less.

[0225] The viscosity η of the two-component liquid resin composition of the first embodiment is as described above. 10P This refers to the viscosity one minute after the conical rotor of the E-type viscometer begins to rotate.

[0226] In the two-component liquid resin composition of the first embodiment, from the viewpoint of further improving the performance balance between the storage stability and flowability of the two-component liquid resin composition, the above-mentioned viscosity η 5P Relative to the above viscosity η 10P viscosity ratio of Ti P (η) 5P / η 10PPreferably, it is 0.5 or more, more preferably 0.6 or more, even more preferably 0.7 or more, even more preferably 0.8 or more, even more preferably 0.9 or more, even more preferably 1.0 or more, and preferably 2.0 or less, more preferably 1.9 or less, even more preferably 1.8 or less, even more preferably 1.7 or less, even more preferably 1.6 or less, even more preferably 1.5 or less, even more preferably 1.4 or less, even more preferably 1.3 or less, even more preferably 1.2 or less.

[0227] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the Ti of the two-component liquid resin composition of the first embodiment... P (η) 5P / η 10P Preferably, the value is 0.5 to 2.0, more preferably 0.5 to 1.9, even more preferably 0.5 to 1.8, even more preferably 0.5 to 1.7, even more preferably 0.6 to 1.6, even more preferably 0.7 to 1.5, even more preferably 0.8 to 1.4, even more preferably 0.9 to 1.3, even more preferably 1.0 to 1.2.

[0228] Hereinafter, the components used in the resin composition of the first embodiment will be described in detail.

[0229] (Epoxy Resin (A))

[0230] The two-component liquid resin composition of the first embodiment contains epoxy resin (A). As a first embodiment of the epoxy resin, from the viewpoint of further improving the balance of performance in terms of strength, hardness, elastic modulus, coefficient of thermal expansion, thermal conductivity, heat dissipation, and electrical properties of the cured two-component liquid resin composition, it is preferable to contain bisphenol-type epoxy resins selected from alicyclic epoxy resins; bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol E type epoxy resin, bisphenol S type epoxy resin, bisphenol M type epoxy resin (4,4'-(1,3-phenylene diisopropyl) bisphenol type epoxy resin), bisphenol P type epoxy resin (4,4'-(1,4-phenylene diisopropyl) bisphenol type epoxy resin), bisphenol Z type epoxy resin (4,4'-cyclohexylene bisphenol type epoxy resin); phenolic varnish type epoxy resin, cresol varnish type epoxy resin, triphenolic methane type phenolic varnish type epoxy resin, tetraphenolic ethane type phenolic varnish type epoxy resin, and phenol having a fused ring aromatic hydrocarbon structure. Aldehyde-based varnish-type epoxy resins and other phenolic varnish-type epoxy resins; aromatic glycidylamine-type epoxy resins such as N,N-diglycidylaniline, N,N-diglycidyltoluidine, diaminodiphenylmethane-type glycidylamine, and aminophenol-type glycidylamine; aminophenol-type epoxy resins; biphenyl-type epoxy resins; xylene-type epoxy resins, biphenyl aralkyl-type epoxy resins, and other arylalkylene-type epoxy resins; naphthalene ether-type epoxy resins, naphthol-type epoxy resins. The composition comprises one or more of the following: naphthalene-type epoxy resins, including naphthalene-type epoxy resins, difunctional to tetrafunctional naphthalene-type epoxy resins, binaphthalene-type epoxy resins, and naphthalene-aralkyl-type epoxy resins; anthracene-type epoxy resins; phenoxy-type epoxy resins; dicyclopentadiene-type epoxy resins; norbornene-type epoxy resins; adamantane-type epoxy resins; and fluorene-type epoxy resins. From the viewpoint of further improving the flowability of the two-component liquid resin composition, it is more preferably to contain an alicyclic epoxy resin.

[0231] The alicyclic epoxy resin of the first embodiment preferably contains an alicyclic epoxy resin that is liquid at 25°C, and more preferably contains epoxy-[epoxy-oxaspirocarbon] epoxy resin selected from vinylcyclopentadiene dioxide, vinylcyclohexene monodioxide, vinylcyclohexene dioxide, dicyclopentadiene oxide, 3,4-epoxy-1-[8,9-epoxy-2,4-dioxaspiro[5.5]undecane-3-yl]-cyclohexane, etc. 8-15 [alkyl]-cycloC 5-12 Alkanes; 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylate, 4,5-epoxycyclooctylmethyl-4',5'-epoxycyclooctane carboxylate, etc., epoxy C 5-12 cycloalkyl C 1-3 Alkyl-epoxy C 5-12 Cycloalkanes carboxylic esters; bis(2-methyl-3,4-epoxycyclohexylmethyl) adipate, etc. 1-3 Alkyl epoxide C 5-12cycloalkyl C 1-3 One or more of alkyl dicarboxylic acid esters, more preferably containing epoxy C 5-12 cycloalkyl C 1-3 Alkyl-epoxy C 5-12 Cycloalkane carboxylic esters, more preferably containing 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylic esters.

[0232] As a commercially available product of 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylic acid ester, the product manufactured by Daicel Corporation under the trade name CELLOXIDE#2021P (epoxy equivalent: 128-140) is a preferred choice.

[0233] In the case where the epoxy resin (A) of the first embodiment contains an alicyclic epoxy resin, from the viewpoint of being able to further improve the flowability of the two-component liquid resin composition, when the content of the epoxy resin (A) is set to 100 parts by mass, the content of the alicyclic epoxy resin in the epoxy resin (A) is preferably 50 parts by mass or more, more preferably 60 parts by mass or more, even more preferably 70 parts by mass or more, even more preferably 80 parts by mass or more, even more preferably 90 parts by mass or more, even more preferably 95 parts by mass or more, and the upper limit is not particularly limited, for example, it can be 100 parts by mass or less.

[0234] Furthermore, from the viewpoint of further improving the flowability of the two-component liquid resin composition, when the content of the epoxy resin (A) is set to 100 parts by mass, the content of alicyclic epoxy resin in the epoxy resin (A) is preferably 50 parts by mass or more and 100 parts by mass or less, more preferably 60 parts by mass or more and 100 parts by mass or less, even more preferably 70 parts by mass or more and 100 parts by mass or less, even more preferably 80 parts by mass or more and 100 parts by mass or less, even more preferably 90 parts by mass or more and 100 parts by mass or less, and even more preferably 95 parts by mass or more and 100 parts by mass or less.

[0235] From the viewpoint of further improving the balance of performance in terms of strength, hardness, elastic modulus, coefficient of thermal expansion, thermal conductivity, heat dissipation, and electrical properties of the cured two-component liquid resin composition, when the total content of the two-component liquid resin composition is set to 100% by mass, the content of epoxy resin (A) in the two-component liquid resin composition of the first embodiment is preferably 5% by mass or more, more preferably 6% by mass or more, even more preferably 7% by mass or more, even more preferably 8% by mass or more, even more preferably 9% by mass or more, even more preferably 10% by mass or more. Moreover, from the viewpoint of further improving the balance of performance in terms of storage stability and flowability of the two-component liquid resin composition, it is preferably 30% by mass or less, more preferably 28% by mass or less, even more preferably 25% by mass or less, even more preferably 23% by mass or less, even more preferably 20% by mass or less, even more preferably 18% by mass or less, even more preferably 15% by mass or less, even more preferably 13% by mass or less.

[0236] Furthermore, from the viewpoint of further improving the balance of performance in terms of the storage stability, flowability, strength, hardness, elastic modulus, coefficient of thermal expansion, thermal conductivity, heat dissipation, and electrical properties of the two-component liquid resin composition, when the total content of the two-component liquid resin composition is set to 100% by mass, the content of epoxy resin (A) in the two-component liquid resin composition is preferably 5% by mass or more and 30% by mass or less, more preferably 5% by mass or more and 28% by mass or less, even more preferably 5% by mass or more and 25% by mass or less, even more preferably 6% by mass or more and 23% by mass or less, even more preferably 7% by mass or more and 20% by mass or less, even more preferably 8% by mass or more and 18% by mass or less, even more preferably 9% by mass or more and 15% by mass or less, even more preferably 10% by mass or more and 13% by mass or less.

[0237] (Acid anhydride (B))

[0238] The two-component liquid resin composition of the first embodiment contains an acid anhydride (B). The acid anhydride (B) functions as a curing agent for the epoxy resin (A).

[0239] The acid anhydride (B) in the first embodiment, from the viewpoint of improving the curability of the two-component liquid resin composition, preferably contains an anhydride selected from dodecenyl succinic anhydride, polyadipic anhydride, polyazelic anhydride, polysedimentic anhydride, poly(ethyl octadecanoic acid) anhydride, poly(phenyl hexadecanoic acid) anhydride, methyl tetrahydrophthalic anhydride, methyl hexahydrophthalic anhydride, hexahydrophthalic anhydride, methyl succinic anhydride, tetrahydrophthalic anhydride, trialkyl tetrahydrophthalic anhydride, methyl cyclohexene dicarboxylic anhydride, phthalic anhydride, trimellitic anhydride, pyromellitic anhydride, benzophenone tetracarboxylic anhydride, ethylene glycol ditriptyltrihydride, chlorobrittle anhydride, tetrahydrophthalic anhydride, methyl nadic anhydride (methyl-5-norbornene). From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, it is more preferable to contain one or more selected from methyl-5-norbornene-2,3-dicarboxylic anhydride, methyl cyclohexane-1,2,3,6-tetrahydrophthalic anhydride, methyl cyclohexane-1,2-dicarboxylic anhydride, methyl cyclohexane-1,2-dicarboxylic anhydride, and methyl tetrahydrophthalic anhydride, and even more preferably to contain methyl-5-norbornene-2,3-dicarboxylic anhydride.

[0240] From the viewpoint of improving the curability of the two-component liquid resin composition, when the total content of the two-component liquid resin composition is set to 100% by mass, the content of acid anhydride (B) in the two-component liquid resin composition of the first embodiment is preferably 5% by mass or more, more preferably 7% by mass or more, even more preferably 9% by mass or more, and even more preferably 11% by mass or more. Moreover, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, it is preferably 20% by mass or less, more preferably 18% by mass or less, even more preferably 16% by mass or less, and even more preferably 14% by mass or less.

[0241] Furthermore, from the viewpoint of improving the balance of performance in terms of storage stability, flowability, and curability of the two-component liquid resin composition, when the total content of the two-component liquid resin composition is set to 100% by mass, the content of acid anhydride (B) in the two-component liquid resin composition is preferably 5% by mass or more and 20% by mass or less, more preferably 7% by mass or more and 18% by mass or less, even more preferably 9% by mass or more and 16% by mass or less, and even more preferably 11% by mass or more and 14% by mass or less.

[0242] (Inorganic filler material (C))

[0243] The two-component liquid resin composition of the first embodiment contains an inorganic filler (C). From the viewpoint of achieving a balance between the strength, hardness, elastic modulus, coefficient of thermal expansion, thermal conductivity, heat dissipation, and electrical properties of the cured two-component liquid resin composition, the inorganic filler (C) preferably contains one or more selected from silica, alumina, zircon, iron oxide, zinc oxide, titanium oxide, silicon nitride, boron nitride, aluminum nitride, silicon carbide, glass fiber, glass flakes, alumina fiber, carbon fiber, graphite, carbon black, ferrite, aluminum hydroxide, magnesium hydroxide, calcium carbonate, manganese carbonate, magnesium carbonate, barium sulfate, potassium titanate, calcium silicate, inorganic hollow microspheres, and silver powder. From the viewpoint of achieving a balance between the storage stability and flowability of the two-component liquid resin composition, it is more preferably to contain one or more selected from silica, alumina, aluminum hydroxide, and calcium carbonate. Furthermore, the inorganic filler (C) can be surface-treated. Examples of surface treatments include alkylation, trimethylsilanization, silicone treatment, and treatment using silane coupling agents, but there are no particular limitations.

[0244] From the viewpoint of being able to further improve the balance of performance in terms of strength, hardness, elastic modulus, coefficient of thermal expansion, thermal conductivity, heat dissipation and electrical properties of the cured two-component liquid resin composition, the inorganic filler material (C) in the first embodiment is preferably fibrous, amorphous or spherical, and from the viewpoint of being able to further improve the balance of performance in terms of storage stability and flowability of the two-component liquid resin composition, it is more preferably spherical.

[0245] Here, the sphere can be a perfect sphere, an ellipse, or a generally spherical shape including an oval shape. The aspect ratio (ratio of major axis to minor axis) of the inorganic filler material (C) in the first embodiment is preferably 1.3 or less, more preferably 1.2 or less, and even more preferably 1.1 or less.

[0246] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the average particle size D of the inorganic filler material (C) in the first embodiment when the cumulative value of the volume frequency particle size distribution measured by laser diffraction scattering method is 50% is considered. 50Preferably, the micrometer is 0.5 μm or more, more preferably 1.0 μm or more, even more preferably 3.0 μm or more, even more preferably 5.0 μm or more, even more preferably 7.0 μm or more, even more preferably 10.0 μm or more, even more preferably 12.0 μm or more, even more preferably 15.0 μm or more, even more preferably 17.0 μm or more, even more preferably 20.0 μm or more, and preferably 100.0 μm or less, more preferably 90.0 μm or less, even more preferably 80.0 μm or less, even more preferably 70.0 μm or less, even more preferably 60.0 μm or less, even more preferably 50.0 μm or less, even more preferably 40.0 μm or less, even more preferably 30.0 μm or less.

[0247] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of two-component liquid resin compositions, the average particle size D 50 Preferably, the micrometer is 0.5 μm or more and 100.0 μm or less; more preferably, 1.0 μm or more and 100.0 μm or less; even more preferably, 3.0 μm or more and 100.0 μm or less; even more preferably, 5.0 μm or more and 90.0 μm or less; even more preferably, 7.0 μm or more and 80.0 μm or less; even more preferably, 10.0 μm or more and 70.0 μm or less; even more preferably, 12.0 μm or more and 60.0 μm or less; even more preferably, 15.0 μm or more and 50.0 μm or less; even more preferably, 17.0 μm or more and 40.0 μm or less; even more preferably, 20.0 μm or more and 30.0 μm or less.

[0248] The inorganic filler material (C) of the first embodiment can be in the above-mentioned average particle size D 50 The range contains two or more particles with different average particle sizes D. 50 Inorganic filler materials.

[0249] The average particle size D of the inorganic filler material (C) in the first embodiment 50 For example, measurements can be performed using a laser diffraction scattering measurement method with a laser diffraction particle size distribution measuring device (e.g., the SALD-7000 manufactured by Shimadzu Corporation).

[0250] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, when the total content of the two-component liquid resin composition is set to 100% by mass, the content of inorganic filler material (C) in the two-component liquid resin composition of the first embodiment is preferably 65% ​​by mass or more, more preferably 67% by mass or more, even more preferably 69% by mass or more, even more preferably 71% by mass or more, even more preferably 73% by mass or more, even more preferably 75% by mass or more, and preferably 85% by mass or less, more preferably 83% by mass or less, even more preferably 81% by mass or less, even more preferably 79% by mass or less, even more preferably 77% by mass or less.

[0251] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, when the total content of the two-component liquid resin composition is set to 100% by mass, the content of inorganic filler material (C) in the two-component liquid resin composition is preferably 65% ​​by mass or more and 85% by mass or less, more preferably 67% by mass or more and 85% by mass or less, even more preferably 69% by mass or more and 83% by mass or less, even more preferably 71% by mass or more and 81% by mass or less, even more preferably 73% by mass or more and 79% by mass or less, and even more preferably 75% by mass or more and 77% by mass or less.

[0252] From the viewpoint of further improving the balance between the storage stability and flowability of the first liquid, when the first liquid as a whole is set to 100% by mass, the content of inorganic filler material (C) in the first liquid of the first embodiment is preferably 65% ​​by mass or more, more preferably 67% by mass or more, even more preferably 69% by mass or more, even more preferably 71% by mass or more, even more preferably 73% by mass or more, and preferably 85% by mass or less, more preferably 83% by mass or less, even more preferably 81% by mass or less, and even more preferably 79% by mass or less.

[0253] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the first liquid, when the first liquid as a whole is set to 100% by mass, the content of inorganic filler material (C) in the first liquid is preferably 65% ​​by mass or more and 85% by mass or less, more preferably 67% by mass or more and 85% by mass or less, even more preferably 69% by mass or more and 83% by mass or less, even more preferably 71% by mass or more and 81% by mass or less, and even more preferably 73% by mass or more and 79% by mass or less.

[0254] From the viewpoint of further improving the balance between the storage stability and flowability of the second liquid, when the second liquid as a whole is set to 100% by mass, the content of inorganic filler material (C) in the second liquid of the first embodiment is preferably 65% ​​by mass or more, more preferably 67% by mass or more, even more preferably 69% by mass or more, even more preferably 71% by mass or more, even more preferably 73% by mass or more, and preferably 85% by mass or less, more preferably 83% by mass or less, even more preferably 81% by mass or less, even more preferably 79% by mass or less, even more preferably 77% by mass or less.

[0255] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the second liquid, when the second liquid as a whole is set to 100% by mass, the content of inorganic filler material (C) in the second liquid is preferably 65% ​​by mass or more and 85% by mass or less, more preferably 67% by mass or more and 83% by mass or less, even more preferably 69% by mass or more and 81% by mass or less, even more preferably 71% by mass or more and 79% by mass or less, and even more preferably 73% by mass or more and 77% by mass or less.

[0256] (Anti-settling agent (D))

[0257] The two-component liquid resin composition of the first embodiment contains an inorganic thickener other than the inorganic filler (C) described above as an anti-settling agent (D). By containing an inorganic thickener as an anti-settling agent (D), the sedimentation of the inorganic filler (C) in the two-component liquid resin composition can be suppressed.

[0258] As an inorganic thickener in the first embodiment, from the viewpoint of being able to further improve the balance between the storage stability and flowability of the two-component liquid resin composition, it is preferable to contain one or more selected from layered inorganic minerals and nano-silica.

[0259] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the layered inorganic minerals in the first embodiment preferably contain one or more selected from clay and talc, and more preferably contain organic clay.

[0260] The clay in the first embodiment preferably contains one or more of the following: kaolin, montmorillonite, illite, bentonite (montmorillonite), lithium montmorillonite, pyrophyllite, attapulgite, sepiolite, and labucite. From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, it is more preferably to contain bentonite.

[0261] Furthermore, the organic clay of the first embodiment preferably contains one or more selected from organic kaolin, organic montmorillonite, organic illite, organic bentonite (organic montmorillonite), organic lithium montmorillonite, organic pyrophyllite, organic attapulgite, organic sepiolite, and organic labucite. From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, it is more preferable to contain organic bentonite, even more preferably to contain bentonite that has undergone ion exchange with a quaternary ammonium salt, even more preferably to contain bentonite that has undergone ion exchange with a quaternary alkyl ammonium salt, even more preferably to contain bentonite that has undergone ion exchange with a quaternary alkyl ammonium salt containing at least one alkyl group having 6 to 24 carbon atoms, and even more preferably to contain bentonite that has undergone ion exchange with a quaternary alkyl ammonium salt containing at least one alkyl group having 12 to 22 carbon atoms.

[0262] Here, organic clay refers to clay obtained by embedding organic compounds between the layers of layered silicate planes. The layered crystal structure is maintained between the layered silicate planes by the presence of intermediate cations, such as sodium or calcium ions. Through ion exchange between these intermediate cations and organic cations, the organic compounds are chemically bonded to the surface of the silicate planes and inserted into the interlayer.

[0263] In the organic clay, the organic compound that has undergone ion exchange with the intermediate layer cation preferably contains a quaternary ammonium salt, more preferably a quaternary alkyl ammonium salt, even more preferably a quaternary alkyl ammonium salt containing at least one alkyl group having 6 to 24 carbon atoms, even more preferably a quaternary alkyl ammonium salt containing at least one alkyl group having 12 to 22 carbon atoms, and even more preferably contains one or more of the following: trimethylstearyl ammonium salt, dimethylstearylbenzyl ammonium salt, dimethyloctadecyl ammonium salt, oleyl bis(2-hydroxyethyl)methyl ammonium salt, dimethylstearyl ammonium salt, benzyl dimethylstearyl ammonium salt, and dimethyl distearate ammonium salt.

[0264] Commercially available organic bentonite products used in the first embodiment include, for example, BENTON34, BENTON SD-1, BENTON SD-2, BENTON SD-3, BENTON57, and BENTON52 manufactured by ELEMENTIS Corporation; Esben NX, Esben N400, Esben WX, Esben NZ, Esben, Esben W, Esben C, Esben E, Esben NZ70, Esben NTO, Esben NX80, Esben NO12S, Esben NEZ, Esben NO12, and Esben NE manufactured by HOJUN Co., Ltd.; and KUNIBIS 110, KUNIBIS 120, and KUNIBIS 127 manufactured by KUNIMINE INDUSTRIESCO., LTD.

[0265] Commercially available products of organolithium montmorillonite used in the first embodiment include, for example, BENTON27 and BENTON38 manufactured by ELEMENTIS.

[0266] The inorganic thickener of the first embodiment contains nano-silica, which refers to the average particle size D of primary particles in silica when the cumulative value of the volume frequency particle size distribution measured by laser diffraction scattering method is 50%. 50 Silica with a particle size smaller than 0.100 μm.

[0267] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the average particle size D of the nano-silica in the first embodiment is as follows: 50 Preferably, it is 0.090 μm or less, more preferably 0.080 μm or less, even more preferably 0.070 μm or less, even more preferably 0.060 μm or less, even more preferably 0.050 μm or less, even more preferably 0.040 μm or less, even more preferably 0.030 μm or less, even more preferably 0.020 μm or less. The lower limit value is not particularly limited, for example, it can be 0.001 μm or more, or 0.003 μm or more, or 0.005 μm or more, or 0.008 μm or more, or 0.010 μm or more.

[0268] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of two-component liquid resin compositions, the aforementioned average particle size D of nano-silica... 50Preferably, the micrometer is 0.001 μm or more and 0.090 μm or less; more preferably, 0.001 μm or more and 0.080 μm or less; even more preferably, 0.001 μm or more and 0.070 μm or less; even more preferably, 0.001 μm or more and 0.060 μm or less; even more preferably, 0.003 μm or more and 0.050 μm or less; even more preferably, 0.005 μm or more and 0.040 μm or less; even more preferably, 0.008 μm or more and 0.030 μm or less; even more preferably, 0.010 μm or more and 0.020 μm or less.

[0269] The average particle size D of the nano-silica in the first embodiment 50 For example, measurements can be performed using a laser diffraction scattering measurement method with a laser diffraction particle size distribution measuring device (e.g., the SALD-7000 manufactured by Shimadzu Corporation).

[0270] Nano-silica, as a first embodiment, can be, for example, REOLOSIL QS09, REOLOSIL QS10, REOLOSIL QS102, REOLOSIL CP102, REOLOSIL QS20, REOLOSIL QS20L, REOLOSIL QS30, REOLOSIL QS40, etc., manufactured by Tokuyama Corporation.

[0271] When the entire two-component liquid resin composition is set to 100% by mass, from the viewpoint of further suppressing the sedimentation of the inorganic filler (C) in the two-component liquid resin composition, the content of the anti-settling agent (D) in the two-component liquid resin composition of the first embodiment is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, even more preferably 0.05% by mass or more, and even more preferably 0.08% by mass or more. Moreover, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, it is preferably 2.00% by mass or less, more preferably 1.50% by mass or less, even more preferably 1.00% by mass or less, even more preferably 0.80% by mass or less, even more preferably 0.50% by mass or less, even more preferably 0.30% by mass or less, and even more preferably 0.20% by mass or less.

[0272] Furthermore, when the entire two-component liquid resin composition is set to 100% by mass, from the viewpoint of further suppressing the sedimentation of the inorganic filler (C) in the two-component liquid resin composition and from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the content of the anti-settling agent (D) in the two-component liquid resin composition is preferably 0.01% by mass or more than 2.00% by mass, more preferably 0.01% by mass or more than 1.50% by mass, even more preferably 0.01% by mass or more than 1.00% by mass, even more preferably 0.01% by mass or more than 0.80% by mass, even more preferably 0.03% by mass or more than 0.50% by mass, even more preferably 0.05% by mass or more than 0.30% by mass, and even more preferably 0.08% by mass or more than 0.20% by mass.

[0273] From the viewpoint of being able to suppress the sedimentation of the inorganic filler material (C) in the first liquid, when the first liquid as a whole is set to 100% by mass, the content of the anti-settling agent (D) in the first liquid of the first embodiment is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, even more preferably 0.05% by mass or more, and even more preferably 0.08% by mass or more. Moreover, from the viewpoint of being able to further improve the balance between the storage stability and the flowability of the first liquid, it is preferably 2.00% by mass or less, more preferably 1.50% by mass or less, even more preferably 1.00% by mass or less, even more preferably 0.80% by mass or less, even more preferably 0.50% by mass or less, and even more preferably 0.30% by mass or less.

[0274] Furthermore, from the viewpoint of being able to suppress the sedimentation of the inorganic filler material (C) in the first liquid and from the viewpoint of being able to further improve the balance between the storage stability and flowability of the first liquid, when the first liquid as a whole is set to 100% by mass, the content of the anti-settling agent (D) in the first liquid is preferably 0.01% by mass or more and 2.00% by mass or less, more preferably 0.01% by mass or more and 1.50% by mass or less, even more preferably 0.01% by mass or more and 1.00% by mass or less, even more preferably 0.03% by mass or more and 0.80% by mass or less, even more preferably 0.05% by mass or more and 0.50% by mass or less, and even more preferably 0.08% by mass or more and 0.30% by mass or less.

[0275] From the viewpoint of suppressing the sedimentation of the inorganic filler material (C) in the second liquid, when the entire second liquid is set to 100% by mass, the content of the anti-settling agent (D) in the second liquid of the first embodiment is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, even more preferably 0.05% by mass or more, and even more preferably 0.08% by mass or more. Moreover, from the viewpoint of further improving the balance between the storage stability and flowability of the second liquid, it is preferably 2.00% by mass or less, more preferably 1.50% by mass or less, even more preferably 1.00% by mass or less, even more preferably 0.80% by mass or less, even more preferably 0.50% by mass or less, even more preferably 0.30% by mass or less, even more preferably 0.20% by mass or less, and even more preferably 0.15% by mass or less.

[0276] Furthermore, from the viewpoint of suppressing the sedimentation of the inorganic filler material (C) in the second liquid and from the viewpoint of further improving the balance between the storage stability and flowability of the second liquid, when the entire second liquid is set to 100% by mass, the content of the anti-settling agent (D) in the second liquid is preferably 0.01% by mass or more and 2.00% by mass or less, more preferably 0.01% by mass or more and 1.50% by mass or less, even more preferably 0.01% by mass or more and 1.00% by mass or less, even more preferably 0.01% by mass or more and 0.80% by mass or less, even more preferably 0.01% by mass or more and 0.50% by mass or less, even more preferably 0.03% by mass or more and 0.30% by mass or less, even more preferably 0.05% by mass or more and 0.20% by mass or less, even more preferably 0.08% by mass or more and 0.15% by mass or less.

[0277] (Cure accelerator (E))

[0278] From the viewpoint that it can promote the reaction between epoxy resin (A) and acid anhydride (B) and thus improve the curability of the two-component liquid resin composition, the two-component liquid resin composition of the first embodiment preferably further contains a curing accelerator (E).

[0279] From the viewpoint of being able to further improve the balance between the storage stability and flowability of the two-component liquid resin composition, the curing accelerator (E) of the first embodiment is preferably included in the second liquid.

[0280] From the viewpoint of improving the curability of the two-component liquid resin composition, the curing accelerator (E) of the first embodiment preferably contains one or more selected from tertiary amines, quaternary ammonium salts, imidazoles, organophosphorus compounds and Lewis acid catalysts, and more preferably contains quaternary ammonium salts.

[0281] The tertiary amine preferably contains one or more of the following: trimethylamine, triethylamine, tripropylamine, tributylamine, and benzyldimethylamine.

[0282] The quaternary ammonium salt preferably contains one or more of the following: an organic acid salt of diazabicycloundecene, such as octanoate of DBU [1,8-diazabicyclo[5.4.0]undecene-7] (manufactured by San-Apro Ltd., trade name: SA102); an organic acid salt of DBN [1,5-diazabicyclo[4.3.0]-5-nonene]; a quaternary ammonium salt as a salt of a tertiary amine and a carboxylic acid (manufactured by San-Apro Ltd., trade name: U-CAT2313); octadecyltrimethylammonium chloride (manufactured by NOFCORPORATION, trade name: Nissan Cation); and tetraalkyl (each alkyl group has 1 to 18 carbon atoms) ammonium salts (e.g., tetraethylammonium bromide, tetrabutylammonium bromide, tetraalkylammonium carboxylates (carboxylic acids have 1 to 12 carbon atoms)).

[0283] From the viewpoint of improving the curability of the two-component liquid resin composition, the curing accelerator (E) of the first embodiment is more preferably an organic acid salt containing diazabicycloundecene.

[0284] The imidazoles preferably contain one or more of the following: 1-benzyl-2-methylimidazolium, 2-ethyl-4-methylimidazolium, 2-undecylimidazolium, 1,2-dimethylimidazolium, and 1-benzyl-2-phenylimidazolium.

[0285] The organophosphorus preferably contains one or more of the following: triphenylphosphine, triphenylphosphine-triphenylborate, tris(p-methoxyphenyl)phosphine, and tetraphenylphosphine-tetraphenylborate.

[0286] The Lewis acid catalyst preferably contains one or more of the following: boron trifluoride amine coordination compound, boron trichloride amine coordination compound, and boron trifluoride ethylamine coordination compound.

[0287] From the viewpoint of improving the curability of the two-component liquid resin composition, when the total content of the two-component liquid resin composition is set to 100% by mass, the content of the curing accelerator (E) in the two-component liquid resin composition of the first embodiment is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.10% by mass or more, even more preferably 0.15% by mass or more, even more preferably 0.20% by mass or more. Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, it is preferably 1.00% by mass or less, more preferably 0.80% by mass or less, even more preferably 0.50% by mass or less, and even more preferably 0.30% by mass or less.

[0288] Furthermore, from the viewpoint of improving the curability, storage stability, and flowability of the two-component liquid resin composition, when the entire two-component liquid resin composition is set to 100% by mass, the content of the curing accelerator (E) in the two-component liquid resin composition is preferably 0.01% by mass or more and 1.00% by mass or less, more preferably 0.05% by mass or more and 1.00% by mass or less, even more preferably 0.10% by mass or more and 0.80% by mass or less, even more preferably 0.15% by mass or more and 0.50% by mass or less, and even more preferably 0.20% by mass or more and 0.30% by mass or less.

[0289] (Other ingredients)

[0290] The two-component liquid resin composition of the first embodiment may contain coupling agents, colorants such as carbon black, defoamers such as silicone defoamers, flame retardants, etc., as needed.

[0291] From the viewpoint of improving the interfacial strength between epoxy resin (A) and inorganic filler material (C), the coupling agent of the first embodiment preferably contains one or more selected from epoxy silane coupling agents, amino silane coupling agents, ureosilane coupling agents and mercaptosilane coupling agents, and more preferably contains epoxy silane coupling agents.

[0292] The epoxy silane coupling agent preferably contains one or more of γ-glycidoxypropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldimethoxysilane and β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, more preferably γ-glycidoxypropyltrimethoxysilane.

[0293] The aminosilane coupling agent preferably contains one or more of the following: γ-aminopropyltriethoxysilane, γ-aminopropyltrimethoxysilane, N-β-(aminoethyl)γ-aminopropyltrimethoxysilane, N-β-(aminoethyl)γ-aminopropylmethyldimethoxysilane, N-phenyl-γ-aminopropyltriethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, N-β-(aminoethyl)γ-aminopropyltriethoxysilane, N-(6-aminohexyl)3-aminopropyltrimethoxysilane, and N-[3-(trimethoxysilyl)propyl]-1,3-phenylenediamine.

[0294] Urea-based silane coupling agents, for example, contain one or more selected from γ-ureidopropyltriethoxysilane and hexamethyldisilazane.

[0295] From the viewpoint of improving the interfacial strength between epoxy resin (A) and inorganic filler (C), when the total content of the above-mentioned two-component liquid resin composition is set to 100% by mass, the content of coupling agent in the two-component liquid resin composition of the first embodiment is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, even more preferably 0.05% by mass or more, even more preferably 0.08% by mass or more, and preferably 1.00% by mass or less, more preferably 0.80% by mass or less, even more preferably 0.60% by mass or less, even more preferably 0.40% by mass or less, and even more preferably 0.20% by mass or less.

[0296] Furthermore, from the viewpoint of improving the interfacial strength between epoxy resin (A) and inorganic filler (C), when the entire two-component liquid resin composition is set to 100% by mass, the content of coupling agent in the two-component liquid resin composition is preferably 0.01% by mass or more and 1.00% by mass or less, more preferably 0.01% by mass or more and 0.80% by mass or less, even more preferably 0.03% by mass or more and 0.60% by mass or less, even more preferably 0.05% by mass or more and 0.40% by mass or less, and even more preferably 0.08% by mass or more and 0.20% by mass or less.

[0297] The colorant in the first embodiment preferably contains one or more of the following: carbon black, titanium dioxide, barium sulfate, iron black, iron oxide red, aniline black, and alizarin; more preferably, it contains carbon black.

[0298] When the total content of the above-mentioned two-component liquid resin composition is set to 100% by mass, the content of colorant in the two-component liquid resin composition of the first embodiment is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.03% by mass or more, even more preferably 0.04% by mass or more, even more preferably 0.05% by mass or more, and preferably 0.50% by mass or less, more preferably 0.40% by mass or less, even more preferably 0.30% by mass or less, even more preferably 0.20% by mass or less, and even more preferably 0.10% by mass or less.

[0299] Furthermore, when the entire two-component liquid resin composition is set to 100% by mass, the content of the colorant in the two-component liquid resin composition is preferably 0.01% by mass or more and 0.50% by mass or less, more preferably 0.02% by mass or more and 0.40% by mass or less, even more preferably 0.03% by mass or more and 0.30% by mass or less, even more preferably 0.04% by mass or more and 0.20% by mass or less, and even more preferably 0.05% by mass or more and 0.10% by mass or less.

[0300] The defoamer of the first embodiment preferably contains one or more of the following: silicone-based defoamers, fluorinated defoamers, and polymeric defoamers; more preferably, it contains a silicone-based defoamer.

[0301] When the total content of the above-mentioned two-component liquid resin composition is set to 100% by mass, the content of the defoamer in the two-component liquid resin composition of the first embodiment is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, even more preferably 0.05% by mass or more, even more preferably 0.08% by mass or more, and preferably 1.00% by mass or less, more preferably 0.80% by mass or less, even more preferably 0.60% by mass or less, even more preferably 0.40% by mass or less, and even more preferably 0.20% by mass or less.

[0302] Furthermore, when the entire two-component liquid resin composition is set to 100% by mass, the content of the defoamer in the two-component liquid resin composition is preferably 0.01% by mass or more and 1.00% by mass, more preferably 0.01% by mass or more and 0.80% by mass, even more preferably 0.03% by mass or more and 0.60% by mass, even more preferably 0.05% by mass or more and 0.40% by mass, and even more preferably 0.08% by mass or more and 0.20% by mass.

[0303] From the viewpoint of being able to further improve the flame retardancy of the cured product of the two-component liquid resin composition, the flame retardant of the first embodiment preferably contains one or more selected from aluminum hydroxide, magnesium hydroxide, zinc borate, zinc molybdate, antimony trioxide, antimony pentoxide, phosphazene, brominated epoxy resin and brominated polycarbonate.

[0304] From the viewpoint of further improving the flame retardancy of the cured two-component liquid resin composition, when the entire two-component liquid resin composition is set to 100% by mass, the content of the flame retardant in the two-component liquid resin composition of the first embodiment is preferably 1.0% by mass or more and 50% by mass or less, more preferably 5.0% by mass or more and 30% by mass or less.

[0305] (Method for manufacturing a two-component liquid resin composition)

[0306] The method for manufacturing the two-component liquid resin composition of the first embodiment will be described in detail.

[0307] The two-component liquid resin composition of the first embodiment can be manufactured by thoroughly mixing and stirring the epoxy resin (A), inorganic filler (C), anti-settling agent (D) and other components mentioned above as the first liquid, and the acid anhydride (B), inorganic filler (C), anti-settling agent (D) and other components as the second liquid using a known method.

[0308] In the case where the two-component liquid resin composition of the first embodiment contains a curing accelerator (E), it is preferable that the second liquid contains a curing accelerator (E).

[0309] As a method for mixing and stirring the components in order to obtain the first liquid or the second liquid in the two-liquid liquid resin composition of the first embodiment, a method using a mixer such as a stirrer, or a kneading machine such as a roller and a kneader can be cited.

[0310] The two-component liquid resin composition of the first embodiment is used in the form of a mixture of the first and second liquids. Methods for mixing the first and second liquids include those using mixers such as a stirrer, and kneading machines such as rollers and kneaders.

[0311] In the two-component liquid resin composition of the first embodiment, from the viewpoint of being able to further improve the performance balance of the two-component liquid resin composition in terms of fluidity, heat resistance during curing, and mechanical properties, when the amount of the first liquid is set to 100 parts by mass, the content of the second liquid when further mixing the first liquid and the second liquid is preferably 50 parts by mass or more, more preferably 70 parts by mass or more, more preferably 90 parts by mass or more, and preferably 150 parts by mass or less, more preferably 130 parts by mass or less, and more preferably 110 parts by mass or less.

[0312] Furthermore, from the viewpoint of further improving the performance balance of the two-component liquid resin composition in terms of fluidity, heat resistance during curing, and mechanical properties, when the amount of the first liquid is set to 100 parts by mass, the content of the second liquid when further mixing the first liquid and the second liquid is preferably 50 parts by mass or more and 150 parts by mass or less, more preferably 70 parts by mass or more and 130 parts by mass or less, and even more preferably 90 parts by mass or more and 110 parts by mass or less.

[0313] <Second Implementation>

[0314] [Two-component liquid resin composition]

[0315] The second embodiment of the two-component liquid resin composition is a two-component liquid resin composition consisting of a first liquid and a second liquid. The first liquid contains epoxy resin (A), inorganic filler (C), and anti-settling agent (D). The second liquid contains acid anhydride (B), inorganic filler (C), and anti-settling agent (D). The anti-settling agent (D) contains a dispersant. The viscosity η of the first liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5A The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

[0316] The two-component liquid resin composition of the second embodiment, by satisfying the above-described configuration, can improve the performance balance between storage stability and flowability.

[0317] It can be considered that in the two-component liquid resin composition of the second embodiment, specific components in the first and second liquids of the two-component liquid resin composition help maintain the preferred dispersion state of the inorganic filler (C) in the first and second liquids. Furthermore, it can be considered that when the viscosity η of the first liquid... 5A Within the aforementioned numerical range, from the viewpoint of preservation stability, the fluidity of the first liquid at rest becomes appropriate, and the sedimentation of the inorganic filler material (C) in the first liquid can be physically suppressed. As a result, it can be considered that the two-liquid liquid resin composition of the second embodiment can achieve a balance between improving the preservation stability in both the first and second liquid states and the fluidity suitable for casting operations.

[0318] In the two-component liquid resin composition of the second embodiment, from the viewpoint of further improving the performance balance between the storage stability and flowability of the two-component liquid resin composition, the above-mentioned viscosity η 5A Preferably, the pressure is 3.0 Pa·s or more, more preferably 5.0 Pa·s or more, even more preferably 8.0 Pa·s or more, even more preferably 10.0 Pa·s or more, even more preferably 15.0 Pa·s or more, even more preferably 20.0 Pa·s or more, and preferably 40.0 Pa·s or less, more preferably 30.0 Pa·s or less, even more preferably 25.0 Pa·s or less.

[0319] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the second embodiment is... 5A Preferably, the pressure is 3.0 Pa·s or more and 40.0 Pa·s or less; more preferably, 5.0 Pa·s or more and 40.0 Pa·s or less; even more preferably, 8.0 Pa·s or more and 40.0 Pa·s or less; even more preferably, 10.0 Pa·s or more and 40.0 Pa·s or less; even more preferably, 15.0 Pa·s or more and 30.0 Pa·s or less; even more preferably, 20.0 Pa·s or more and 25.0 Pa·s or less.

[0320] The viscosity η of the two-component liquid resin composition of the second embodiment is as described above. 5A This refers to the viscosity one minute after the conical rotor of the E-type viscometer begins to rotate.

[0321] In the two-component liquid resin composition of the second embodiment, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the first liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10A Preferably, the pressure is 1.0 Pa·s or more, more preferably 3.0 Pa·s or more, even more preferably 5.0 Pa·s or more, even more preferably 8.0 Pa·s or more, even more preferably 10.0 Pa·s or more, even more preferably 15.0 Pa·s or more, even more preferably 20.0 Pa·s or more, and preferably 50.0 Pa·s or less, more preferably 40.0 Pa·s or less, even more preferably 30.0 Pa·s or less.

[0322] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the second embodiment is... 10A Preferably, the pressure is 1.0 Pa·s or more and 50.0 Pa·s or less; more preferably, 3.0 Pa·s or more and 50.0 Pa·s or less; even more preferably, 5.0 Pa·s or more and 50.0 Pa·s or less; even more preferably, 8.0 Pa·s or more and 50.0 Pa·s or less; even more preferably, 10.0 Pa·s or more and 50.0 Pa·s or less; even more preferably, 15.0 Pa·s or more and 40.0 Pa·s or less; even more preferably, 20.0 Pa·s or more and 30.0 Pa·s or less.

[0323] The viscosity η of the two-component liquid resin composition of the second embodiment is as described above. 10A This refers to the viscosity one minute after the conical rotor of the E-type viscometer begins to rotate.

[0324] In the two-component liquid resin composition of the second embodiment, from the viewpoint of further improving the performance balance between the storage stability and flowability of the two-component liquid resin composition, the above-mentioned viscosity η 5A Relative to the above viscosity η 10A viscosity ratio of Ti A (η) 5A / η 10A Preferably, the value is 0.4 or more, more preferably 0.5 or more, even more preferably 0.6 or more, even more preferably 0.7 or more, even more preferably 0.8 or more, and preferably 1.5 or less, more preferably 1.3 or less, even more preferably 1.1 or less, and even more preferably 0.9 or less.

[0325] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity ratio of the two-component liquid resin composition of the second embodiment is higher than that of Ti. A (η) 5A / η 10A The value is preferably 0.4 or more and 1.5 or less, more preferably 0.5 or more and 1.5 or less, even more preferably 0.6 or more and 1.3 or less, even more preferably 0.7 or more and 1.1 or less, and even more preferably 0.8 or more and 0.9 or less.

[0326] In the two-component liquid resin composition of the second embodiment, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the second liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5B Preferably, the pressure is 1.0 Pa·s or more, more preferably 5.0 Pa·s or more, even more preferably 10.0 Pa·s or more, even more preferably 15.0 Pa·s or more, even more preferably 20.0 Pa·s or more, and preferably 70.0 Pa·s or less, more preferably 65.0 Pa·s or less, even more preferably 60.0 Pa·s or less, even more preferably 55.0 Pa·s or less, even more preferably 50.0 Pa·s or less, even more preferably 45.0 Pa·s or less, even more preferably 40.0 Pa·s or less, even more preferably 35.0 Pa·s or less.

[0327] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the second embodiment is... 5B Preferably, the pressure is 1.0 Pa·s or more and 70.0 Pa·s or less; more preferably, 1.0 Pa·s or more and 65.0 Pa·s or less; even more preferably, 1.0 Pa·s or more and 60.0 Pa·s or less; even more preferably, 1.0 Pa·s or more and 55.0 Pa·s or less; even more preferably, 5.0 Pa·s or more and 50.0 Pa·s or less; even more preferably, 10.0 Pa·s or more and 45.0 Pa·s or less; even more preferably, 15.0 Pa·s or more and 40.0 Pa·s or less; even more preferably, 20.0 Pa·s or more and 35.0 Pa·s or less.

[0328] The viscosity η of the two-component liquid resin composition of the second embodiment is as described above. 5B This refers to the viscosity one minute after the conical rotor of the E-type viscometer begins to rotate.

[0329] In the two-component liquid resin composition of the second embodiment, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the second liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10B Preferably, the pressure is 1.0 Pa·s or more, more preferably 3.0 Pa·s or more, even more preferably 5.0 Pa·s or more, even more preferably 10.0 Pa·s or more, even more preferably 15.0 Pa·s or more, and preferably 50.0 Pa·s or less, more preferably 45.0 Pa·s or less, even more preferably 40.0 Pa·s or less, even more preferably 35.0 Pa·s or less, and even more preferably 30.0 Pa·s or less.

[0330] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the second embodiment is... 10B Preferably, the pressure is 1.0 Pa·s or more and 50.0 Pa·s or less; more preferably, 3.0 Pa·s or more and 45.0 Pa·s or less; even more preferably, 5.0 Pa·s or more and 40.0 Pa·s or less; even more preferably, 10.0 Pa·s or more and 35.0 Pa·s or less; even more preferably, 15.0 Pa·s or more and 30.0 Pa·s or less.

[0331] The viscosity η of the two-component liquid resin composition of the second embodiment is as described above. 10B This refers to the viscosity one minute after the conical rotor of the E-type viscometer begins to rotate.

[0332] In the two-component liquid resin composition of the second embodiment, from the viewpoint of further improving the performance balance between the storage stability and flowability of the two-component liquid resin composition, the above-mentioned viscosity η 5B Relative to the above viscosity η 10B viscosity ratio of Ti B (η) 5B / η 10B The value is preferably 0.5 or more, more preferably 0.8 or more, even more preferably 1.0 or more, and preferably 4.0 or less, more preferably 3.5 or less, even more preferably 3.0 or less, even more preferably 2.5 or less, even more preferably 2.0 or less, and even more preferably 1.5 or less.

[0333] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity ratio of the two-component liquid resin composition of the second embodiment is higher than that of Ti. B (η) 5B / η10B The value is preferably 0.5 to 4.0, more preferably 0.5 to 3.5, even more preferably 0.5 to 3.0, even more preferably 0.5 to 2.5, even more preferably 0.8 to 2.0, and even more preferably 1.0 to 1.5.

[0334] In the two-component liquid resin composition of the second embodiment, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the mixture of the first liquid and the second liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5P Preferably, the pressure is 1.0 Pa·s or more, more preferably 5.0 Pa·s or more, even more preferably 10.0 Pa·s or more, even more preferably 15.0 Pa·s or more, even more preferably 20.0 Pa·s or more, and preferably 50.0 Pa·s or less, more preferably 45.0 Pa·s or less, even more preferably 40.0 Pa·s or less, even more preferably 35.0 Pa·s or less, even more preferably 30.0 Pa·s or less, and even more preferably 28.0 Pa·s or less.

[0335] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the second embodiment is... 5P Preferably, the pressure is 1.0 Pa·s or more and 50.0 Pa·s or less; more preferably, 1.0 Pa·s or more and 45.0 Pa·s or less; even more preferably, 5.0 Pa·s or more and 40.0 Pa·s or less; even more preferably, 10.0 Pa·s or more and 35.0 Pa·s or less; even more preferably, 15.0 Pa·s or more and 30.0 Pa·s or less; even more preferably, 20.0 Pa·s or more and 28.0 Pa·s or less.

[0336] The viscosity η of the two-component liquid resin composition of the second embodiment is as described above. 5P This refers to the viscosity one minute after the conical rotor of the E-type viscometer begins to rotate.

[0337] In the two-component liquid resin composition of the second embodiment, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the mixture of the first liquid and the second liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10PPreferably, the pressure is 10.0 Pa·s or more, more preferably 12.0 Pa·s or more, even more preferably 14.0 Pa·s or more, even more preferably 16.0 Pa·s or more, even more preferably 18.0 Pa·s or more, even more preferably 20.0 Pa·s or more, even more preferably 21.0 Pa·s or more, and preferably 50.0 Pa·s or less, more preferably 45.0 Pa·s or less, even more preferably 40.0 Pa·s or less, even more preferably 35.0 Pa·s or less, even more preferably 30.0 Pa·s or less, even more preferably 27.0 Pa·s or less.

[0338] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the second embodiment is... 10P Preferably, the pressure is 10.0 Pa·s or more and 50.0 Pa·s or less; more preferably, 12.0 Pa·s or more and 50.0 Pa·s or less; even more preferably, 14.0 Pa·s or more and 45.0 Pa·s or less; even more preferably, 16.0 Pa·s or more and 40.0 Pa·s or less; even more preferably, 18.0 Pa·s or more and 35.0 Pa·s or less; even more preferably, 20.0 Pa·s or more and 30.0 Pa·s or less; even more preferably, 21.0 Pa·s or more and 27.0 Pa·s or less.

[0339] The viscosity η of the two-component liquid resin composition of the second embodiment is as described above. 10P This refers to the viscosity one minute after the conical rotor of the E-type viscometer begins to rotate.

[0340] In the two-component liquid resin composition of the second embodiment, from the viewpoint of further improving the performance balance between the storage stability and flowability of the two-component liquid resin composition, the above-mentioned viscosity η 5P Relative to the above viscosity η 10P viscosity ratio of Ti P (η) 5P / η 10P Preferably, it is 0.5 or more, more preferably 0.6 or more, even more preferably 0.7 or more, even more preferably 0.8 or more, even more preferably 0.9 or more, even more preferably 1.0 or more, and preferably 2.0 or less, more preferably 1.9 or less, even more preferably 1.8 or less, even more preferably 1.7 or less, even more preferably 1.6 or less, even more preferably 1.5 or less, even more preferably 1.4 or less, even more preferably 1.3 or less, even more preferably 1.2 or less.

[0341] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity ratio of the two-component liquid resin composition of the second embodiment is higher than that of Ti. P (η) 5P / η 10P Preferably, the value is 0.5 to 2.0, more preferably 0.5 to 1.9, even more preferably 0.5 to 1.8, even more preferably 0.5 to 1.7, even more preferably 0.6 to 1.6, even more preferably 0.7 to 1.5, even more preferably 0.8 to 1.4, even more preferably 0.9 to 1.3, even more preferably 1.0 to 1.2.

[0342] Hereinafter, the components used in the resin composition of the second embodiment will be described in detail.

[0343] (Epoxy Resin (A))

[0344] The two-component liquid resin composition of the second embodiment contains epoxy resin (A). As a second embodiment of the epoxy resin, from the viewpoint of further improving the balance of strength, hardness, elastic modulus, coefficient of thermal expansion, thermal conductivity, heat dissipation, and electrical properties of the cured two-component liquid resin composition, it is preferable to contain bisphenol-type epoxy resins selected from alicyclic epoxy resins; bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol E type epoxy resin, bisphenol S type epoxy resin, bisphenol M type epoxy resin (4,4'-(1,3-phenylene diisopropyl) bisphenol type epoxy resin), bisphenol P type epoxy resin (4,4'-(1,4-phenylene diisopropyl) bisphenol type epoxy resin), bisphenol Z type epoxy resin (4,4'-cyclohexylene bisphenol type epoxy resin); phenolic varnish type epoxy resin, cresol varnish type epoxy resin, triphenolic methane type phenolic varnish type epoxy resin, tetraphenolic ethane type phenolic varnish type epoxy resin, and phenol having a fused ring aromatic hydrocarbon structure. Aldehyde-based varnish-type epoxy resins and other phenolic varnish-type epoxy resins; aromatic glycidylamine-type epoxy resins such as N,N-diglycidylaniline, N,N-diglycidyltoluidine, diaminodiphenylmethane-type glycidylamine, and aminophenol-type glycidylamine; aminophenol-type epoxy resins; biphenyl-type epoxy resins; xylene-type epoxy resins, biphenyl aralkyl-type epoxy resins, and other arylalkylene-type epoxy resins; naphthalene ether-type epoxy resins, naphthol-type epoxy resins. The composition comprises one or more of the following: naphthalene-type epoxy resins, including naphthalene-type epoxy resins, difunctional to tetrafunctional naphthalene-type epoxy resins, binaphthalene-type epoxy resins, and naphthalene-aralkyl-type epoxy resins; anthracene-type epoxy resins; phenoxy-type epoxy resins; dicyclopentadiene-type epoxy resins; norbornene-type epoxy resins; adamantane-type epoxy resins; and fluorene-type epoxy resins. From the viewpoint of further improving the flowability of the two-component liquid resin composition, it is more preferably to contain an alicyclic epoxy resin.

[0345] The alicyclic epoxy resin in the second embodiment preferably contains an alicyclic epoxy resin that is liquid at 25°C, and more preferably contains epoxy-[epoxy-oxaspirocarbon] epoxy resin selected from vinylcyclopentadiene dioxide, vinylcyclohexene monodioxide, vinylcyclohexene dioxide, dicyclopentadiene oxide, 3,4-epoxy-1-[8,9-epoxy-2,4-dioxaspiro[5.5]undecane-3-yl]-cyclohexane, etc. 8-15 [alkyl]-cycloC 5-12 Alkanes; 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylate, 4,5-epoxycyclooctylmethyl-4',5'-epoxycyclooctane carboxylate, etc., epoxy C 5-12 cycloalkyl C 1-3 Alkyl-epoxy C 5-12 Cycloalkanes carboxylic esters; bis(2-methyl-3,4-epoxycyclohexylmethyl) adipate, etc. 1-3 Alkyl epoxide C 5-12cycloalkyl C 1-3 One or more of alkyl dicarboxylic acid esters, more preferably containing epoxy C 5-12 cycloalkyl C 1-3 Alkyl-epoxy C 5-12 Cycloalkane carboxylic esters, more preferably containing 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylic esters.

[0346] As a commercially available product of 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylic acid ester, the product manufactured by Daicel Corporation under the trade name CELLOXIDE#2021P (epoxy equivalent: 128-140) is a preferred choice.

[0347] In the case where the epoxy resin (A) of the second embodiment contains an alicyclic epoxy resin, from the viewpoint of being able to further improve the flowability of the two-component liquid resin composition, when the content of the epoxy resin (A) is set to 100 parts by mass, the content of the alicyclic epoxy resin in the epoxy resin (A) is preferably 50 parts by mass or more, more preferably 60 parts by mass or more, even more preferably 70 parts by mass or more, even more preferably 80 parts by mass or more, even more preferably 90 parts by mass or more, even more preferably 95 parts by mass or more, and the upper limit is not particularly limited, for example, it can be 100 parts by mass or less.

[0348] Furthermore, from the viewpoint of further improving the flowability of the two-component liquid resin composition, when the content of the epoxy resin (A) is set to 100 parts by mass, the content of alicyclic epoxy resin in the epoxy resin (A) is preferably 50 parts by mass or more and 100 parts by mass or less, more preferably 60 parts by mass or more and 100 parts by mass or less, even more preferably 70 parts by mass or more and 100 parts by mass or less, even more preferably 80 parts by mass or more and 100 parts by mass or less, even more preferably 90 parts by mass or more and 100 parts by mass or less, and even more preferably 95 parts by mass or more and 100 parts by mass or less.

[0349] From the viewpoint of further improving the balance of performance in terms of strength, hardness, elastic modulus, coefficient of thermal expansion, thermal conductivity, heat dissipation, and electrical properties of the cured two-component liquid resin composition, when the total content of the two-component liquid resin composition is set to 100% by mass, the content of epoxy resin (A) in the two-component liquid resin composition of the second embodiment is preferably 5% by mass or more, more preferably 6% by mass or more, even more preferably 7% by mass or more, even more preferably 8% by mass or more, even more preferably 9% by mass or more, even more preferably 10% by mass or more. Moreover, from the viewpoint of further improving the balance of performance in terms of storage stability and flowability of the two-component liquid resin composition, it is preferably 30% by mass or less, more preferably 28% by mass or less, even more preferably 25% by mass or less, even more preferably 23% by mass or less, even more preferably 20% by mass or less, even more preferably 18% by mass or less, even more preferably 15% by mass or less, even more preferably 13% by mass or less, even more preferably 11% by mass or less.

[0350] Furthermore, from the viewpoint of further improving the balance of performance in terms of the storage stability, flowability, strength, hardness, elastic modulus, coefficient of thermal expansion, thermal conductivity, heat dissipation, and electrical properties of the two-component liquid resin composition, when the total content of the two-component liquid resin composition is set to 100% by mass, the content of epoxy resin (A) in the two-component liquid resin composition is preferably 5% by mass or more and 30% by mass or less, more preferably 5% by mass or more and 28% by mass or less, even more preferably 5% by mass or more and 25% by mass or less, even more preferably 5% by mass or more and 23% by mass or less, even more preferably 6% by mass or more and 20% by mass or less, even more preferably 7% by mass or more and 18% by mass or less, even more preferably 8% by mass or more and 15% by mass or less, even more preferably 9% by mass or more and 13% by mass or less, even more preferably 10% by mass or more and 11% by mass or less.

[0351] (Acid anhydride (B))

[0352] The two-component liquid resin composition of the second embodiment contains an acid anhydride (B). The acid anhydride (B) functions as a curing agent for the epoxy resin (A).

[0353] As the second embodiment, the acid anhydride (B), from the viewpoint of improving the curability of the two-component liquid resin composition, preferably contains an anhydride selected from dodecenyl succinic anhydride, polyadipic anhydride, polyazelic anhydride, polysedimentic anhydride, poly(ethyl octadecanoic acid) anhydride, poly(phenyl hexadecanoic acid) anhydride, methyl tetrahydrophthalic anhydride, methyl hexahydrophthalic anhydride, hexahydrophthalic anhydride, methyl succinic anhydride, tetrahydrophthalic anhydride, trialkyl tetrahydrophthalic anhydride, methyl cyclohexene dicarboxylic anhydride, phthalic anhydride, trimellitic anhydride, pyromellitic anhydride, benzophenone tetracarboxylic anhydride, ethylene glycol ditriptyltrihydride, chlorobrittle anhydride, tetrahydrophthalic anhydride, methyl nadic anhydride (methyl-5-norbornene). From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, it is more preferable to contain one or more selected from methyl-5-norbornene-2,3-dicarboxylic anhydride, methyl cyclohexane-1,2,3,6-tetrahydrophthalic anhydride, methyl cyclohexane-1,2-dicarboxylic anhydride, methyl cyclohexane-1,2-dicarboxylic anhydride, and methyl tetrahydrophthalic anhydride, and even more preferably to contain methyl-5-norbornene-2,3-dicarboxylic anhydride.

[0354] When the entire two-component liquid resin composition is set to 100% by mass, from the viewpoint of improving the curability of the two-component liquid resin composition, the content of acid anhydride (B) in the two-component liquid resin composition of the second embodiment is preferably 5% by mass or more, more preferably 7% by mass or more, even more preferably 9% by mass or more, and even more preferably 11% by mass or more. Moreover, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, it is preferably 20% by mass or less, more preferably 18% by mass or less, even more preferably 16% by mass or less, even more preferably 14% by mass or less, and even more preferably 13% by mass or less.

[0355] Furthermore, when the entire two-component liquid resin composition is set to 100% by mass, from the viewpoint of improving the balance of performance in terms of storage stability, flowability, and curability of the two-component liquid resin composition, the content of acid anhydride (B) in the two-component liquid resin composition is preferably 5% by mass or more and 20% by mass or less, more preferably 5% by mass or more and 18% by mass or less, even more preferably 7% by mass or more and 16% by mass or less, even more preferably 9% by mass or more and 14% by mass or less, and even more preferably 11% by mass or more and 13% by mass or less.

[0356] (Inorganic filler material (C))

[0357] The two-component liquid resin composition of the second embodiment contains an inorganic filler (C). From the viewpoint of achieving a balance between the strength, hardness, elastic modulus, coefficient of thermal expansion, thermal conductivity, heat dissipation, and electrical properties of the cured two-component liquid resin composition, the inorganic filler (C) preferably contains one or more selected from silica, alumina, zircon, iron oxide, zinc oxide, titanium oxide, silicon nitride, boron nitride, aluminum nitride, silicon carbide, glass fiber, glass flakes, alumina fiber, carbon fiber, graphite, carbon black, ferrite, aluminum hydroxide, magnesium hydroxide, calcium carbonate, manganese carbonate, magnesium carbonate, barium sulfate, potassium titanate, calcium silicate, inorganic hollow microspheres, and silver powder. From the viewpoint of achieving a balance between the storage stability and flowability of the two-component liquid resin composition, it is more preferable to contain one or more selected from silica, alumina, aluminum hydroxide, and calcium carbonate. Furthermore, the inorganic filler (C) can be surface-treated. Examples of surface treatments include alkylation, trimethylsilanization, silicone treatment, and treatment using silane coupling agents, but there are no particular limitations.

[0358] From the viewpoint of being able to further improve the balance of performance in terms of strength, hardness, elastic modulus, coefficient of thermal expansion, thermal conductivity, heat dissipation and electrical properties of the cured two-component liquid resin composition, the inorganic filler material (C) in the second embodiment is preferably fibrous, amorphous or spherical, and from the viewpoint of being able to further improve the balance of performance in terms of storage stability and flowability of the two-component liquid resin composition, it is more preferably spherical.

[0359] Here, the sphere can be a perfect sphere, an ellipse, or a generally spherical shape including an oval shape. The aspect ratio (ratio of major axis to minor axis) of the inorganic filler material (C) in the second embodiment is preferably 1.3 or less, more preferably 1.2 or less, and even more preferably 1.1 or less.

[0360] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the average particle size D of the inorganic filler material (C) in the second embodiment when the cumulative value of the volume frequency particle size distribution measured by laser diffraction scattering method reaches 50% is... 50Preferably, the micrometer is 0.5 μm or more, more preferably 1.0 μm or more, even more preferably 3.0 μm or more, even more preferably 5.0 μm or more, even more preferably 7.0 μm or more, even more preferably 10.0 μm or more, even more preferably 12.0 μm or more, even more preferably 15.0 μm or more, even more preferably 17.0 μm or more, even more preferably 20.0 μm or more, and preferably 100.0 μm or less, more preferably 90.0 μm or less, even more preferably 80.0 μm or less, even more preferably 70.0 μm or less, even more preferably 60.0 μm or less, even more preferably 50.0 μm or less, even more preferably 40.0 μm or less, even more preferably 30.0 μm or less.

[0361] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of two-component liquid resin compositions, the average particle size D 50 Preferably, the micrometer is 0.5 μm or more and 100.0 μm or less; more preferably, 1.0 μm or more and 100.0 μm or less; even more preferably, 3.0 μm or more and 100.0 μm or less; even more preferably, 5.0 μm or more and 90.0 μm or less; even more preferably, 7.0 μm or more and 80.0 μm or less; even more preferably, 10.0 μm or more and 70.0 μm or less; even more preferably, 12.0 μm or more and 60.0 μm or less; even more preferably, 15.0 μm or more and 50.0 μm or less; even more preferably, 17.0 μm or more and 40.0 μm or less; even more preferably, 20.0 μm or more and 30.0 μm or less.

[0362] The inorganic filler material (C) in the second embodiment can be in the above-mentioned average particle size D 50 The range contains two or more particles with different average particle sizes D. 50 Inorganic filler materials.

[0363] The average particle size D of the inorganic filler material (C) in the second embodiment 50 For example, measurements can be performed using a laser diffraction scattering measurement method with a laser diffraction particle size distribution measuring device (e.g., the SALD-7000 manufactured by Shimadzu Corporation).

[0364] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, when the total content of the two-component liquid resin composition is set to 100% by mass, the content of inorganic filler material (C) in the two-component liquid resin composition of the second embodiment is preferably 65% ​​by mass or more, more preferably 67% by mass or more, even more preferably 69% by mass or more, even more preferably 71% by mass or more, even more preferably 73% by mass or more, even more preferably 75% by mass or more, and preferably 85% by mass or less, more preferably 83% by mass or less, even more preferably 81% by mass or less, even more preferably 79% by mass or less, even more preferably 77% by mass or less.

[0365] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, when the total content of the two-component liquid resin composition is set to 100% by mass, the content of inorganic filler material (C) in the two-component liquid resin composition is preferably 65% ​​by mass or more and 85% by mass or less, more preferably 67% by mass or more and 85% by mass or less, even more preferably 69% by mass or more and 83% by mass or less, even more preferably 71% by mass or more and 81% by mass or less, even more preferably 73% by mass or more and 79% by mass or less, and even more preferably 75% by mass or more and 77% by mass or less.

[0366] From the viewpoint of further improving the balance between the storage stability and flowability of the first liquid, when the first liquid as a whole is set to 100% by mass, the content of inorganic filler material (C) in the first liquid of the second embodiment is preferably 65% ​​by mass or more, more preferably 67% by mass or more, even more preferably 69% by mass or more, even more preferably 71% by mass or more, even more preferably 73% by mass or more, even more preferably 75% by mass or more, even more preferably 77% by mass or more, and preferably 85% by mass or less, more preferably 83% by mass or less, even more preferably 81% by mass or less, even more preferably 79% by mass or less.

[0367] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the first liquid, when the first liquid as a whole is set to 100% by mass, the content of inorganic filler material (C) in the first liquid is preferably 65% ​​by mass or more and 85% by mass or less, more preferably 67% by mass or more and 85% by mass or less, even more preferably 69% by mass or more and 85% by mass or less, even more preferably 71% by mass or more and 85% by mass or less, even more preferably 73% by mass or more and 83% by mass or less, even more preferably 75% by mass or more and 81% by mass or less, even more preferably 77% by mass or more and 79% by mass or less.

[0368] From the viewpoint of further improving the balance between the storage stability and flowability of the second liquid, when the second liquid as a whole is set to 100% by mass, the content of inorganic filler material (C) in the second liquid of the second embodiment is preferably 65% ​​by mass or more, more preferably 67% by mass or more, even more preferably 69% by mass or more, even more preferably 71% by mass or more, even more preferably 73% by mass or more, and preferably 85% by mass or less, more preferably 83% by mass or less, even more preferably 81% by mass or less, even more preferably 79% by mass or less, even more preferably 77% by mass or less.

[0369] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the second liquid, when the second liquid as a whole is set to 100% by mass, the content of inorganic filler material (C) in the second liquid is preferably 65% ​​by mass or more and 85% by mass or less, more preferably 67% by mass or more and 83% by mass or less, even more preferably 69% by mass or more and 81% by mass or less, even more preferably 71% by mass or more and 79% by mass or less, and even more preferably 73% by mass or more and 77% by mass or less.

[0370] (Anti-settling agent (D))

[0371] The two-component liquid resin composition of the second embodiment contains a dispersant as an anti-settling agent (D). By containing a dispersant as an anti-settling agent (D), the sedimentation of the inorganic filler material (C) in the two-component liquid resin composition can be suppressed.

[0372] As a dispersant in the second embodiment, it preferably contains an ester compound comprising a long-chain hydrocarbon group, more preferably contains one or more selected from carboxylic acid ester compounds comprising a long-chain hydrocarbon group, phosphate ester compounds comprising a long-chain hydrocarbon group, sulfate ester compounds comprising a long-chain hydrocarbon group, nitrate ester compounds comprising a long-chain hydrocarbon group, and carbonate compounds comprising a long-chain hydrocarbon group, and even more preferably contains one or more selected from carboxylic acid ester compounds comprising a long-chain hydrocarbon group and phosphate ester compounds comprising a long-chain hydrocarbon group.

[0373] It can be considered that such ester compounds containing long-chain hydrocarbon groups can suppress the secondary aggregation of inorganic filler material (C) through the steric hindrance generated by the long-chain hydrocarbon groups, thus further improving the balance between the storage stability and flowability of the two-component liquid resin composition.

[0374] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the long-chain hydrocarbon group in the ester compound containing the long-chain hydrocarbon group in the second embodiment preferably contains one or more of one, two or three aryl groups selected from alkylene, alkyl, alkenyl, aralkyl, aryl and hydrocarbon hydrogen atoms that are substituted by substituents, and more preferably contains one or more of one or more of alkylene, alkyl and alkenyl groups.

[0375] Long-chain hydrocarbon groups can be straight-chain or branched. Regarding long-chain hydrocarbon groups, some of the hydrogen atoms can be replaced by substituents such as hydroxyl, aldehyde, carbonyl, carboxyl, amino, nitro, sulfonyl, and halogenated groups. Long-chain hydrocarbon groups may contain oxygen-containing linking groups such as ether bonds and ester bonds within their long chains.

[0376] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the ester group in the ester compound containing the long-chain hydrocarbon group in the second embodiment preferably contains one or more selected from carboxylic acid ester group, phosphate ester group, sulfate ester group, nitrate ester group and carbonate group, and more preferably contains one or more selected from carboxylic acid ester group and phosphate ester group.

[0377] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the number of carbon atoms of the long-chain hydrocarbon group in the ester compound containing the long-chain hydrocarbon group in the second embodiment is preferably 4 or more, more preferably 6 or more, even more preferably 8 or more, even more preferably 10 or more, and preferably 1000 or less, more preferably 800 or less, even more preferably 600 or less, even more preferably 400 or less, and even more preferably 200 or less.

[0378] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the number of carbon atoms in the long-chain hydrocarbon group is preferably 4 or more and 1000 or less, more preferably 4 or more and 800 or less, even more preferably 6 or more and 600 or less, even more preferably 8 or more and 400 or less, and even more preferably 10 or more and 200 or less.

[0379] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the mass-average molecular weight of the ester compound containing long-chain hydrocarbon groups in the second embodiment is preferably 300 or more, more preferably 400 or more, even more preferably 500 or more, even more preferably 600 or more, even more preferably 700 or more, even more preferably 800 or more, and preferably 50,000 or less, more preferably 30,000 or less, even more preferably 15,000 or less, and even more preferably 10,000 or less.

[0380] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the mass-average molecular weight of the ester compound is preferably 300 or more and 50,000 or less, more preferably 400 or more and 50,000 or less, even more preferably 500 or more and 50,000 or less, even more preferably 600 or more and 30,000 or less, even more preferably 700 or more and 15,000 or less, and even more preferably 800 or more and 10,000 or less.

[0381] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the ester compound containing long-chain hydrocarbon groups in the second embodiment preferably contains one or more selected from polyhydroxycarboxylic acid esters, acidic phosphate esters, and polymer modifiers containing carboxyl groups.

[0382] From the viewpoint of being able to further improve the balance between the storage stability and flowability of the two-component liquid resin composition, the polyhydroxycarboxylic acid ester of the second embodiment preferably contains a compound represented by the following general formula (Ib).

[0383]

[0384] In the above general formula (Ib), v and y are independently 1 or 2, w is an integer greater than 0 and less than 10, and x is an integer greater than 14 and less than 40. Additionally, -(CH=CH) w -(CH2) x - It can be a segmental structure with w consecutive (CH=CH) followed by x consecutive (CH2) connections, or it can be a random structure with (CH=CH) and (CH2) arranged randomly.

[0385] In the above general formula (Ib), from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, w is preferably an integer of 0 to 8. Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, x is preferably an integer of 18 to 36.

[0386] Commercially available polyhydroxycarboxylic acid esters as a second embodiment include, for example, BYK-R606 manufactured by BYK Japan KK.

[0387] From the viewpoint of being able to further improve the balance between the storage stability and flowability of the two-component liquid resin composition, the acidic phosphate ester of the second embodiment preferably contains a compound represented by the following general formula (IIb).

[0388]

[0389] In the general formula (IIb) above, R1 is a saturated or unsaturated hydrocarbon group with 4 to 20 carbon atoms, R2 is a saturated hydrocarbon subgroup with 1 to 20 carbon atoms, R3 is a saturated hydrocarbon subgroup with 2 or 3 carbon atoms, and R4 is a saturated or unsaturated hydrocarbon subgroup with 1 to 8 carbon atoms. k, l, and m are integers between 0 and 20, and n is 1 or 2. When multiple R1s exist, they can be the same or different; when multiple R2s exist, they can be the same or different; when multiple R3s exist, they can be the same or different; and when multiple R4s exist, they can be the same or different. The order of k -COR2O- groups, l -R3O- groups, and m -COR4COO- groups is arbitrary. In the case of n=2, there are 2 R1O (COR2O) groups. k (R3O) l (COR4COO) m The bases can be the same or different.

[0390] In the above general formula (IIb), R1 is not particularly limited as long as it is a saturated or unsaturated hydrocarbon group with 4 to 20 carbon atoms. R1 preferably contains one or more of saturated and unsaturated hydrocarbon groups. The saturated hydrocarbon group preferably contains one or more of octyl, 2-ethylhexyl, nonyl, decyl, undecyl, dodecyl, tetradecyl, hexadecyl, and octadecyl. The unsaturated hydrocarbon group preferably contains one or more of phenyl and nonylphenyl. From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the number of carbon atoms in R1 is preferably 6 to 18, and when k=l=m=0, the number of carbon atoms in R1 is preferably 10 to 18.

[0391] In the above general formula (IIb), R2 is a saturated hydrocarbon group having 1 to 20 carbon atoms. The number of carbon atoms in R2 is preferably 1 to 16. From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, R2 preferably contains one or more of methylene, ethylene, pentylene, tetradecylene, and pentadecylene.

[0392] In the above general formula (IIb), R3 is a saturated hydrocarbon group with 2 or 3 carbon atoms. From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, R3 is preferably a saturated hydrocarbon group with 2 carbon atoms, and more preferably an ethylene group.

[0393] In the above general formula (IIb), R4 is a saturated or unsaturated hydrocarbon group having 1 to 8 carbon atoms. The number of carbon atoms in R4 is preferably 1 to 6. From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, R4 preferably contains one or more of methylene, ethylene, propylene, butylene, amylene, and phenyl.

[0394] In the above general formula (IIb), from the viewpoint of being able to further improve the balance between the storage stability and flowability of the two-component liquid resin composition, k, l and m are preferably integers from 0 to 10.

[0395] In the above general formula (IIb), the monomer units expressed together with k, l, and m—namely, k -COR2O- groups, l -R3O- groups, and m -COR4COO- groups—are arranged arbitrarily between the R1O- group and the phosphorus atom. These groups do not necessarily need to be arranged according to general formula (IIb). Furthermore, -(COR2O) k (R3O) l (COR4COO) m -The group can be a block copolymer or a random copolymer.

[0396] Commercially available examples of acidic phosphate esters as a second embodiment include, for example, BYK-W9010 manufactured by BYK Japan KK Co., Ltd.

[0397] The second embodiment of the carboxyl-containing polymer modifier contains an ester compound of an α-olefin-maleic anhydride copolymer and a monohydric alcohol. The arrangement of the hydrophobic sites, such as the hydrocarbon groups derived from α-olefins, and the hydrophilic sites, such as the carboxyl groups formed by the ring-opening addition of maleic anhydride groups, in such ester compounds is controlled.

[0398] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the α-olefin constituting the ester compound of the α-olefin-maleic anhydride copolymer and monohydric alcohol in the second embodiment preferably contains a straight-chain or branched unsaturated hydrocarbon with 6 or more carbon atoms, and more preferably contains an unsaturated hydrocarbon with 6 or more but less than 30 carbon atoms. The unsaturated hydrocarbon with 6 or more but less than 30 carbon atoms preferably contains one or more of 1-dodecene and 1-tetradecene.

[0399] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the monohydric alcohol in the ester compound of the α-olefin-maleic anhydride copolymer and monohydric alcohol constituting the second embodiment preferably contains one or more of aliphatic alcohols, aromatic alcohols and polyalkylene glycol monoalkyl ethers.

[0400] The aliphatic alcohol in the second embodiment preferably contains one or more selected from cetyl alcohol and stearyl alcohol.

[0401] The aromatic alcohol in the second embodiment preferably contains one or more selected from 1-phenyl-1-propanol and α-phenoxy-2-propanol.

[0402] The polyalkylene glycol monoalkyl ether in the second embodiment preferably contains polyethylene glycol monoalkyl ether with a molecular weight of 400 to 700.

[0403] The acid value of the carboxyl-containing polymer modifier in the second embodiment is preferably 10 mg KOH / g or more and 100 mg KOH / g or less, more preferably 15 mg KOH / g or more and 60 mg KOH / g or less.

[0404] Commercially available examples of carboxyl-containing polymer modifiers as a second embodiment include FLOREN G-700, FLOREN G-900, FLORENG-1500, and NC-500 manufactured by Kyoeisha Chemical Co., Ltd.

[0405] When the entire two-component liquid resin composition is set to 100% by mass, from the viewpoint of further suppressing the sedimentation of the inorganic filler (C) in the two-component liquid resin composition, the content of the anti-settling agent (D) in the two-component liquid resin composition of the second embodiment is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, even more preferably 0.05% by mass or more, even more preferably 0.08% by mass or more, even more preferably 0.10% by mass or more, even more preferably 0.13% by mass or more, even more preferably 0.15% by mass or more. Moreover, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, it is preferably 2.00% by mass or less, more preferably 1.50% by mass or less, even more preferably 1.00% by mass or less, even more preferably 0.80% by mass or less, even more preferably 0.50% by mass or less, even more preferably 0.30% by mass or less, even more preferably 0.25% by mass or less, even more preferably 0.20% by mass or less.

[0406] Furthermore, when the entire two-component liquid resin composition is set to 100% by mass, from the viewpoint of further suppressing the sedimentation of the inorganic filler (C) in the two-component liquid resin composition and from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the content of the anti-settling agent (D) in the two-component liquid resin composition is preferably 0.01% by mass or more than 2.00% by mass, more preferably 0.01% by mass or more than 1.50% by mass, even more preferably 0.03% by mass or more than 1.00% by mass, even more preferably 0.05% by mass or more than 0.80% by mass, even more preferably 0.08% by mass or more than 0.50% by mass, even more preferably 0.10% by mass or more than 0.30% by mass, even more preferably 0.13% by mass or more than 0.25% by mass, and even more preferably 0.15% by mass or more than 0.20% by mass.

[0407] From the viewpoint of suppressing the sedimentation of the inorganic filler material (C) in the first liquid, when the first liquid as a whole is set to 100% by mass, the content of the anti-settling agent (D) in the first liquid of the second embodiment is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, even more preferably 0.05% by mass or more, even more preferably 0.08% by mass or more, even more preferably 0.10% by mass or more, even more preferably 0.13% by mass or more, even more preferably 0.15% by mass or more, even more preferably 0.18% by mass or more. Moreover, from the viewpoint of further improving the balance between the storage stability and the flowability of the first liquid, it is preferably 2.00% by mass or less, more preferably 1.50% by mass or less, even more preferably 1.00% by mass or less, even more preferably 0.80% by mass or less, even more preferably 0.50% by mass or less, even more preferably 0.30% by mass or less, even more preferably 0.25% by mass or less.

[0408] Furthermore, from the viewpoint of suppressing the sedimentation of the inorganic filler material (C) in the first liquid and from the viewpoint of further improving the balance between the storage stability and flowability of the first liquid, when the first liquid as a whole is set to 100% by mass, the content of the anti-settling agent (D) in the first liquid is preferably 0.01% by mass or more and 2.00% by mass, more preferably 0.03% by mass or more and 2.00% by mass, even more preferably 0.05% by mass or more and 1.50% by mass, even more preferably 0.08% by mass or more and 1.00% by mass, even more preferably 0.10% by mass or more and 0.80% by mass, even more preferably 0.13% by mass or more and 0.50% by mass, even more preferably 0.15% by mass or more and 0.30% by mass, and even more preferably 0.18% by mass or more and 0.25% by mass.

[0409] From the viewpoint of suppressing the sedimentation of the inorganic filler material (C) in the second liquid, when the entire second liquid is set to 100% by mass, the content of the anti-settling agent (D) in the second liquid of the second embodiment is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, even more preferably 0.05% by mass or more, and even more preferably 0.08% by mass or more. Moreover, from the viewpoint of further improving the balance between the storage stability and flowability of the second liquid, it is preferably 2.00% by mass or less, more preferably 1.50% by mass or less, even more preferably 1.00% by mass or less, even more preferably 0.80% by mass or less, even more preferably 0.50% by mass or less, even more preferably 0.30% by mass or less, even more preferably 0.25% by mass or less, even more preferably 0.20% by mass or less, and even more preferably 0.15% by mass or less.

[0410] Furthermore, from the viewpoint of suppressing the sedimentation of the inorganic filler material (C) in the second liquid and from the viewpoint of further improving the balance between the storage stability and flowability of the second liquid, when the entire second liquid is set to 100% by mass, the content of the anti-settling agent (D) in the second liquid is preferably 0.01% by mass or more and 2.00% by mass or less, more preferably 0.01% by mass or more and 1.50% by mass or less, even more preferably 0.01% by mass or more and 1.00% by mass or less, even more preferably 0.01% by mass or more and 0.80% by mass or less, even more preferably 0.01% by mass or more and 0.50% by mass or less, even more preferably 0.01% by mass or more and 0.30% by mass or less, even more preferably 0.03% by mass or more and 0.25% by mass or less, even more preferably 0.05% by mass or more and 0.20% by mass or less, even more preferably 0.08% by mass or more and 0.15% by mass or less.

[0411] (Cure accelerator (E))

[0412] From the viewpoint that it can promote the reaction between epoxy resin (A) and acid anhydride (B) and thus improve the curability of the two-component liquid resin composition, the two-component liquid resin composition of the second embodiment preferably further contains a curing accelerator (E).

[0413] From the viewpoint of being able to further improve the balance between the storage stability and flowability of the two-component liquid resin composition, the curing accelerator (E) of the second embodiment is preferably included in the second liquid.

[0414] From the viewpoint of improving the curability of the two-component liquid resin composition, the curing accelerator (E) of the second embodiment preferably contains one or more selected from tertiary amines, quaternary ammonium salts, imidazoles, organophosphorus compounds and Lewis acid catalysts, and more preferably contains quaternary ammonium salts.

[0415] The tertiary amine preferably contains one or more of the following: trimethylamine, triethylamine, tripropylamine, tributylamine, and benzyldimethylamine.

[0416] The quaternary ammonium salt preferably contains one or more of the following: an organic acid salt of diazabicycloundecene, such as octanoate of DBU [1,8-diazabicyclo[5.4.0]undecene-7] (manufactured by San-Apro Ltd., trade name: SA102); an organic acid salt of DBN [1,5-diazabicyclo[4.3.0]-5-nonene]; a quaternary ammonium salt as a salt of a tertiary amine and a carboxylic acid (manufactured by San-Apro Ltd., trade name: U-CAT2313); octadecyltrimethylammonium chloride (manufactured by NOFCORPORATION, trade name: Nissan Cation); and tetraalkyl (each alkyl group has 1 to 18 carbon atoms) ammonium salts (e.g., tetraethylammonium bromide, tetrabutylammonium bromide, tetraalkylammonium carboxylates (carboxylic acids have 1 to 12 carbon atoms)).

[0417] From the viewpoint of improving the curability of the two-component liquid resin composition, the curing accelerator (E) of the second embodiment is more preferably an organic acid salt containing diazabicycloundecene.

[0418] The imidazoles preferably contain one or more of the following: 1-benzyl-2-methylimidazolium, 2-ethyl-4-methylimidazolium, 2-undecylimidazolium, 1,2-dimethylimidazolium, and 1-benzyl-2-phenylimidazolium.

[0419] The organophosphorus preferably contains one or more of the following: triphenylphosphine, triphenylphosphine-triphenylborate, tris(p-methoxyphenyl)phosphine, and tetraphenylphosphine-tetraphenylborate.

[0420] The Lewis acid catalyst preferably contains one or more of the following: boron trifluoride amine coordination compound, boron trichloride amine coordination compound, and boron trifluoride ethylamine coordination compound.

[0421] From the viewpoint of improving the curability of the two-component liquid resin composition, when the total content of the two-component liquid resin composition is set to 100% by mass, the content of the curing accelerator (E) in the two-component liquid resin composition of the second embodiment is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.10% by mass or more, even more preferably 0.15% by mass or more, even more preferably 0.20% by mass or more. Moreover, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, it is preferably 1.00% by mass or less, more preferably 0.80% by mass or less, even more preferably 0.50% by mass or less, and even more preferably 0.30% by mass or less.

[0422] Furthermore, from the viewpoint of improving the curability, storage stability, and flowability of the two-component liquid resin composition, when the entire two-component liquid resin composition is set to 100% by mass, the content of the curing accelerator (E) in the two-component liquid resin composition is preferably 0.01% by mass or more and 1.00% by mass or less, more preferably 0.05% by mass or more and 1.00% by mass or less, even more preferably 0.10% by mass or more and 0.80% by mass or less, even more preferably 0.15% by mass or more and 0.50% by mass or less, and even more preferably 0.20% by mass or more and 0.30% by mass or less.

[0423] (Other ingredients)

[0424] The two-component liquid resin composition of the second embodiment may contain coupling agents, colorants such as carbon black, defoamers such as silicone defoamers, flame retardants, etc., as needed.

[0425] From the viewpoint of improving the interfacial strength between epoxy resin (A) and inorganic filler material (C), the coupling agent of the second embodiment preferably contains one or more selected from epoxy silane coupling agents, amino silane coupling agents, ureosilane coupling agents and mercaptosilane coupling agents, and more preferably contains epoxy silane coupling agents.

[0426] The epoxy silane coupling agent preferably contains one or more of γ-glycidoxypropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldimethoxysilane and β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, more preferably γ-glycidoxypropyltrimethoxysilane.

[0427] The aminosilane coupling agent preferably contains one or more of the following: γ-aminopropyltriethoxysilane, γ-aminopropyltrimethoxysilane, N-β-(aminoethyl)γ-aminopropyltrimethoxysilane, N-β-(aminoethyl)γ-aminopropylmethyldimethoxysilane, N-phenyl-γ-aminopropyltriethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, N-β-(aminoethyl)γ-aminopropyltriethoxysilane, N-(6-aminohexyl)3-aminopropyltrimethoxysilane, and N-[3-(trimethoxysilyl)propyl]-1,3-phenylenediamine.

[0428] Urea-based silane coupling agents, for example, contain one or more selected from γ-ureidopropyltriethoxysilane and hexamethyldisilazane.

[0429] From the viewpoint of improving the interfacial strength between epoxy resin (A) and inorganic filler (C), when the total content of the above-mentioned two-component liquid resin composition is set to 100% by mass, the content of coupling agent in the two-component liquid resin composition of the second embodiment is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, even more preferably 0.05% by mass or more, even more preferably 0.08% by mass or more, and preferably 1.00% by mass or less, more preferably 0.80% by mass or less, even more preferably 0.60% by mass or less, even more preferably 0.40% by mass or less, and even more preferably 0.20% by mass or less.

[0430] Furthermore, from the viewpoint of improving the interfacial strength between epoxy resin (A) and inorganic filler (C), when the entire two-component liquid resin composition is set to 100% by mass, the content of coupling agent in the two-component liquid resin composition is preferably 0.01% by mass or more and 1.00% by mass or less, more preferably 0.01% by mass or more and 0.80% by mass or less, even more preferably 0.03% by mass or more and 0.60% by mass or less, even more preferably 0.05% by mass or more and 0.40% by mass or less, and even more preferably 0.08% by mass or more and 0.20% by mass or less.

[0431] The colorant in the second embodiment preferably contains one or more of the following: carbon black, titanium dioxide, barium sulfate, iron black, iron oxide red, aniline black, and alizarin; more preferably, it contains carbon black.

[0432] When the total content of the above-mentioned two-component liquid resin composition is set to 100% by mass, the content of colorant in the two-component liquid resin composition of the second embodiment is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.03% by mass or more, even more preferably 0.04% by mass or more, even more preferably 0.05% by mass or more, and preferably 0.50% by mass or less, more preferably 0.40% by mass or less, even more preferably 0.30% by mass or less, even more preferably 0.20% by mass or less, and even more preferably 0.10% by mass or less.

[0433] Furthermore, when the entire two-component liquid resin composition is set to 100% by mass, the content of the colorant in the two-component liquid resin composition is preferably 0.01% by mass or more and 0.50% by mass or less, more preferably 0.02% by mass or more and 0.40% by mass or less, even more preferably 0.03% by mass or more and 0.30% by mass or less, even more preferably 0.04% by mass or more and 0.20% by mass or less, and even more preferably 0.05% by mass or more and 0.10% by mass or less.

[0434] The defoamer in the second embodiment preferably contains one or more of the following: silicone-based defoamers, fluorinated defoamers, and polymeric defoamers; more preferably, it contains a silicone-based defoamer.

[0435] When the total content of the above-mentioned two-component liquid resin composition is set to 100% by mass, the content of the defoamer in the two-component liquid resin composition of the second embodiment is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, even more preferably 0.05% by mass or more, even more preferably 0.08% by mass or more, and preferably 1.00% by mass or less, more preferably 0.80% by mass or less, even more preferably 0.60% by mass or less, even more preferably 0.40% by mass or less, and even more preferably 0.20% by mass or less.

[0436] Furthermore, when the entire two-component liquid resin composition is set to 100% by mass, the content of the defoamer in the two-component liquid resin composition is preferably 0.01% by mass or more and 1.00% by mass, more preferably 0.01% by mass or more and 0.80% by mass, even more preferably 0.03% by mass or more and 0.60% by mass, even more preferably 0.05% by mass or more and 0.40% by mass, and even more preferably 0.08% by mass or more and 0.20% by mass.

[0437] From the viewpoint of being able to further improve the flame retardancy of the cured product of the two-component liquid resin composition, the flame retardant of the second embodiment preferably contains one or more selected from aluminum hydroxide, magnesium hydroxide, zinc borate, zinc molybdate, antimony trioxide, antimony pentoxide, phosphazene, brominated epoxy resin and brominated polycarbonate.

[0438] From the viewpoint of further improving the flame retardancy of the cured two-component liquid resin composition, when the entire two-component liquid resin composition is set to 100% by mass, the content of the flame retardant in the two-component liquid resin composition of the second embodiment is preferably 1.0% by mass or more and 50% by mass or less, more preferably 5.0% by mass or more and 30% by mass or less.

[0439] (Method for manufacturing a two-component liquid resin composition)

[0440] The method for manufacturing the two-component liquid resin composition of the second embodiment will be described in detail.

[0441] The two-component liquid resin composition of the second embodiment can be manufactured by thoroughly mixing and stirring the epoxy resin (A), inorganic filler (C), anti-settling agent (D) and other components mentioned above as the first liquid, and the acid anhydride (B), inorganic filler (C), anti-settling agent (D) and other components as the second liquid using known methods.

[0442] In the case where the two-component liquid resin composition of the second embodiment contains a curing accelerator (E), it is preferable that the second liquid contains a curing accelerator (E).

[0443] As a method for mixing and stirring the components in order to obtain the first or second liquid in the two-liquid liquid resin composition of the second embodiment, a method using a mixer such as a stirrer, or a kneading machine such as a roller and a kneader can be cited.

[0444] The second embodiment of the two-component liquid resin composition is used in the form of a mixture of the first and second liquids described above. Examples of methods for mixing the first and second liquids include using a mixer such as a stirrer, or a kneading machine such as a roller or kneader.

[0445] In the two-component liquid resin composition of the second embodiment, from the viewpoint of further improving the performance balance of the two-component liquid resin composition in terms of fluidity, heat resistance during curing, and mechanical properties, when the amount of the first liquid is set to 100 parts by mass, the content of the second liquid when further mixing the first liquid and the second liquid is preferably 50 parts by mass or more, more preferably 70 parts by mass or more, more preferably 90 parts by mass or more, and preferably 150 parts by mass or less, more preferably 130 parts by mass or less, and more preferably 110 parts by mass or less.

[0446] Furthermore, from the viewpoint of further improving the performance balance of the two-component liquid resin composition in terms of fluidity, heat resistance during curing, and mechanical properties, when the amount of the first liquid is set to 100 parts by mass, the content of the second liquid when further mixing the first liquid and the second liquid is preferably 50 parts by mass or more and 150 parts by mass or less, more preferably 70 parts by mass or more and 130 parts by mass or less, and even more preferably 90 parts by mass or more and 110 parts by mass or less.

[0447] <Third Implementation Method>

[0448] [Two-component liquid resin composition]

[0449] The third embodiment of the two-component liquid resin composition is a two-component liquid resin composition consisting of a first liquid and a second liquid. The first liquid contains epoxy resin (A), inorganic filler (C), and anti-settling agent (D), and the second liquid contains acid anhydride (B), inorganic filler (C), and anti-settling agent (D). The viscosity η of the first liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 60°C. 5A The value is above 1.0 Pa·s and below 15.0 Pa·s.

[0450] The two-component liquid resin composition of the third embodiment, by satisfying the above-described configuration, can improve the performance balance between storage stability and flowability.

[0451] It can be considered that in the two-component liquid resin composition of the third embodiment, when the viscosity η of the first liquid in the two-component liquid resin composition is at 60°C... 5A Within the aforementioned numerical range, from the viewpoint of preservation stability, the fluidity of the first liquid at rest becomes appropriate, and the sedimentation of the inorganic filler material (C) in the first liquid can be physically suppressed. As a result, it can be considered that the two-liquid liquid resin composition of the third embodiment can achieve a balance between improving the preservation stability in both the first and second liquid states and the fluidity suitable for casting operations.

[0452] In the two-component liquid resin composition of the third embodiment, from the viewpoint of further improving the performance balance between the storage stability and flowability of the two-component liquid resin composition, the above-mentioned viscosity η 5APreferably, the pressure is 1.2 Pa·s or more, more preferably 1.4 Pa·s or more, even more preferably 1.6 Pa·s or more, even more preferably 1.8 Pa·s or more, even more preferably 1.9 Pa·s or more, and preferably 14.0 Pa·s or less, more preferably 12.0 Pa·s or less, even more preferably 10.0 Pa·s or less, even more preferably 8.0 Pa·s or less, even more preferably 6.0 Pa·s or less, and even more preferably 4.0 Pa·s or less.

[0453] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the third embodiment is... 5A Preferably, the pressure is 1.2 Pa·s or more and 14.0 Pa·s or less; more preferably, 1.2 Pa·s or more and 12.0 Pa·s or less; even more preferably, 1.4 Pa·s or more and 10.0 Pa·s or less; even more preferably, 1.6 Pa·s or more and 8.0 Pa·s or less; even more preferably, 1.8 Pa·s or more and 6.0 Pa·s or less; even more preferably, 1.9 Pa·s or more and 4.0 Pa·s or less.

[0454] The viscosity η of the two-component liquid resin composition of the third embodiment is as described above. 5A This refers to the viscosity one minute after the conical rotor of the E-type viscometer begins to rotate.

[0455] In the two-component liquid resin composition of the third embodiment, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the first liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 60°C. 10A Preferably, the pressure is 1.0 Pa·s or more, more preferably 1.2 Pa·s or more, even more preferably 1.4 Pa·s or more, even more preferably 1.6 Pa·s or more, even more preferably 1.7 Pa·s or more, even more preferably 1.8 Pa·s or more, and preferably 15.0 Pa·s or less, more preferably 14.0 Pa·s or less, even more preferably 13.0 Pa·s or less.

[0456] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the third embodiment is... 10APreferably, the pressure is 1.0 Pa·s or more and 15.0 Pa·s or less; more preferably, 1.2 Pa·s or more and 15.0 Pa·s or less; even more preferably, 1.4 Pa·s or more and 15.0 Pa·s or less; even more preferably, 1.6 Pa·s or more and 15.0 Pa·s or less; even more preferably, 1.7 Pa·s or more and 14.0 Pa·s or less; even more preferably, 1.8 Pa·s or more and 13.0 Pa·s or less.

[0457] The viscosity η of the two-component liquid resin composition of the third embodiment is as described above. 10A This refers to the viscosity one minute after the conical rotor of the E-type viscometer begins to rotate.

[0458] In the two-component liquid resin composition of the third embodiment, from the viewpoint of further improving the performance balance between the storage stability and flowability of the two-component liquid resin composition, the above-mentioned viscosity η 5A Relative to the above viscosity η 10A viscosity ratio of Ti A (η) 5A / η 10A The value is preferably 0.1 or more, more preferably 0.3 or more, even more preferably 0.5 or more, even more preferably 0.8 or more, and preferably 1.5 or less, more preferably 1.3 or less, and even more preferably 1.1 or less.

[0459] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity ratio of the two-component liquid resin composition in the third embodiment is higher than that of Ti. A (η) 5A / η 10A The value is preferably 0.1 to 1.5, more preferably 0.3 to 1.5, even more preferably 0.5 to 1.3, and even more preferably 0.8 to 1.1.

[0460] In the two-component liquid resin composition of the third embodiment, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the second liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5BPreferably, the pressure is 1.0 Pa·s or more, more preferably 5.0 Pa·s or more, even more preferably 10.0 Pa·s or more, even more preferably 15.0 Pa·s or more, even more preferably 20.0 Pa·s or more, and preferably 50.0 Pa·s or less, more preferably 45.0 Pa·s or less, even more preferably 40.0 Pa·s or less, even more preferably 35.0 Pa·s or less, even more preferably 30.0 Pa·s or less, and even more preferably 25.0 Pa·s or less.

[0461] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the third embodiment is... 5B Preferably, the pressure is 1.0 Pa·s or more and 50.0 Pa·s or less; more preferably, 1.0 Pa·s or more and 45.0 Pa·s or less; even more preferably, 5.0 Pa·s or more and 40.0 Pa·s or less; even more preferably, 10.0 Pa·s or more and 35.0 Pa·s or less; even more preferably, 15.0 Pa·s or more and 30.0 Pa·s or less; even more preferably, 20.0 Pa·s or more and 25.0 Pa·s or less.

[0462] The viscosity η of the two-component liquid resin composition of the third embodiment is as described above. 5B This refers to the viscosity one minute after the conical rotor of the E-type viscometer begins to rotate.

[0463] In the two-component liquid resin composition of the third embodiment, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the second liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10B Preferably, the pressure is 1.0 Pa·s or more, more preferably 3.0 Pa·s or more, even more preferably 5.0 Pa·s or more, even more preferably 10.0 Pa·s or more, even more preferably 15.0 Pa·s or more, and preferably 50.0 Pa·s or less, more preferably 45.0 Pa·s or less, even more preferably 40.0 Pa·s or less, even more preferably 35.0 Pa·s or less, even more preferably 30.0 Pa·s or less, even more preferably 25.0 Pa·s or less, even more preferably 20.0 Pa·s or less.

[0464] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the third embodiment is... 10BPreferably, the pressure is 1.0 Pa·s or more and 50.0 Pa·s or less; more preferably, 1.0 Pa·s or more and 45.0 Pa·s or less; even more preferably, 1.0 Pa·s or more and 40.0 Pa·s or less; even more preferably, 3.0 Pa·s or more and 35.0 Pa·s or less; even more preferably, 5.0 Pa·s or more and 30.0 Pa·s or less; even more preferably, 10.0 Pa·s or more and 25.0 Pa·s or less; even more preferably, 15.0 Pa·s or more and 20.0 Pa·s or less.

[0465] The viscosity η of the two-component liquid resin composition of the third embodiment is as described above. 10B This refers to the viscosity one minute after the conical rotor of the E-type viscometer begins to rotate.

[0466] In the two-component liquid resin composition of the third embodiment, from the viewpoint of further improving the performance balance between the storage stability and flowability of the two-component liquid resin composition, the above-mentioned viscosity η 5B Relative to the above viscosity η 10B viscosity ratio of Ti B (η) 5B / η 10B The value is preferably 0.5 or more, more preferably 0.8 or more, even more preferably 1.0 or more, and preferably 2.5 or less, more preferably 2.2 or less, even more preferably 2.0 or less, even more preferably 1.7 or less, even more preferably 1.5 or less, and even more preferably 1.3 or less.

[0467] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity ratio of the two-component liquid resin composition in the third embodiment is higher than that of Ti. B (η) 5B / η 10B The value is preferably 0.5 to 2.5, more preferably 0.5 to 2.2, even more preferably 0.5 to 2.0, even more preferably 0.5 to 1.7, even more preferably 0.8 to 1.5, and even more preferably 1.0 to 1.3.

[0468] In the two-component liquid resin composition of the third embodiment, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the mixture of the first liquid and the second liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 60°C. 5PPreferably, the pressure is 1.0 Pa·s or more, more preferably 1.5 Pa·s or more, even more preferably 2.0 Pa·s or more, even more preferably 2.5 Pa·s or more, even more preferably 3.0 Pa·s or more, even more preferably 3.5 Pa·s or more, and preferably 30.0 Pa·s or less, more preferably 25.0 Pa·s or less, even more preferably 20.0 Pa·s or less, even more preferably 15.0 Pa·s or less, even more preferably 10.0 Pa·s or less.

[0469] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the third embodiment is... 5P Preferably, the pressure is 1.0 Pa·s or more and 30.0 Pa·s or less; more preferably, 1.5 Pa·s or more and 30.0 Pa·s or less; even more preferably, 2.0 Pa·s or more and 25.0 Pa·s or less; even more preferably, 2.5 Pa·s or more and 20.0 Pa·s or less; even more preferably, 3.0 Pa·s or more and 15.0 Pa·s or less; even more preferably, 3.5 Pa·s or more and 10.0 Pa·s or less.

[0470] The viscosity η of the two-component liquid resin composition of the third embodiment is as described above. 5P This refers to the viscosity one minute after the conical rotor of the E-type viscometer begins to rotate.

[0471] In the two-component liquid resin composition of the third embodiment, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the mixture of the first liquid and the second liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 60°C. 10P Preferably, the pressure is 1.0 Pa·s or more, more preferably 1.5 Pa·s or more, even more preferably 2.0 Pa·s or more, even more preferably 2.5 Pa·s or more, even more preferably 3.0 Pa·s or more, and preferably 30.0 Pa·s or less, more preferably 25.0 Pa·s or less, even more preferably 20.0 Pa·s or less, even more preferably 15.0 Pa·s or less, even more preferably 10.0 Pa·s or less, and even more preferably 5.0 Pa·s or less.

[0472] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the third embodiment is... 10PPreferably, the pressure is 1.0 Pa·s or more and 30.0 Pa·s or less; more preferably, 1.0 Pa·s or more and 25.0 Pa·s or less; even more preferably, 1.5 Pa·s or more and 20.0 Pa·s or less; even more preferably, 2.0 Pa·s or more and 15.0 Pa·s or less; even more preferably, 2.5 Pa·s or more and 10.0 Pa·s or less; even more preferably, 3.0 Pa·s or more and 5.0 Pa·s or less.

[0473] The viscosity η of the two-component liquid resin composition of the third embodiment is as described above. 10P This refers to the viscosity one minute after the conical rotor of the E-type viscometer begins to rotate.

[0474] In the two-component liquid resin composition of the third embodiment, from the viewpoint of further improving the performance balance between the storage stability and flowability of the two-component liquid resin composition, the above-mentioned viscosity η 5P Relative to the above viscosity η 10P viscosity ratio of Ti P (η) 5P / η 10P Preferably, it is 0.5 or more, more preferably 0.6 or more, even more preferably 0.7 or more, even more preferably 0.8 or more, even more preferably 0.9 or more, even more preferably 1.0 or more, even more preferably 1.1 or more, and preferably 2.0 or less, more preferably 1.9 or less, even more preferably 1.8 or less, even more preferably 1.7 or less, even more preferably 1.6 or less, even more preferably 1.5 or less, even more preferably 1.4 or less, even more preferably 1.3 or less.

[0475] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the viscosity ratio of the two-component liquid resin composition in the third embodiment is higher than that of Ti. P (η) 5P / η 10P The value is preferably 0.5 to 2.0, more preferably 0.5 to 1.9, even more preferably 0.6 to 1.8, even more preferably 0.7 to 1.7, even more preferably 0.8 to 1.6, even more preferably 0.9 to 1.5, even more preferably 1.0 to 1.4, and even more preferably 1.1 to 1.3.

[0476] The components used in the resin composition of the third embodiment will be described in detail below.

[0477] (Epoxy Resin (A))

[0478] The two-component liquid resin composition of the third embodiment contains epoxy resin (A). From the viewpoint of further improving the balance of performance in terms of strength, hardness, elastic modulus, coefficient of thermal expansion, thermal conductivity, heat dissipation, and electrical properties of the cured two-component liquid resin composition, the epoxy resin of the third embodiment preferably contains alicyclic epoxy resins; bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol E type epoxy resin, bisphenol S type epoxy resin, bisphenol M type epoxy resin (4,4'-(1,3-phenylene diisopropyl)bisphenol type epoxy resin), bisphenol P type epoxy resin (4,4'- Bisphenol-type epoxy resins include bisphenol (1,4-phenylene diisopropyl) bisphenol type epoxy resin, bisphenol Z type epoxy resin (4,4'-cyclohexylene bisphenol type epoxy resin), etc.; phenolic varnish-type epoxy resins include phenolic varnish-type epoxy resin, cresol phenolic varnish-type epoxy resin, triphenolic methane phenolic varnish-type epoxy resin, tetraphenolic ethane phenolic varnish-type epoxy resin, and phenolic varnish-type epoxy resin with fused ring aromatic hydrocarbon structure, etc.; N,N-diglycidylaniline, N,N-diglycidyltoluidine, diaminodiphenylmethane, etc. Aromatic glycidylamine epoxy resins such as alkyl glycidylamine and aminophenol glycidylamine; aminophenol epoxy resins; biphenyl epoxy resins; arylalkylene epoxy resins such as xylene epoxy resins and biphenyl aralkyl epoxy resins; naphthalene-type epoxy resins such as naphthalene ether epoxy resins, naphthol epoxy resins, naphthyldiphenol epoxy resins, difunctional to tetrafunctional naphthalene epoxy resins, binaphthalene epoxy resins, and naphthalene aralkyl epoxy resins; anthracene epoxy resins; phenoxy epoxy resins; dicyclopentadiene epoxy resins; norbornene epoxy resins. The epoxy resin contains one or more of the following: adamantane-type epoxy resin and fluorene-type epoxy resin. More preferably, it contains one or more of the following: alicyclic epoxy resin, bisphenol A-type epoxy resin, bisphenol F-type epoxy resin and aminophenol-type epoxy resin. More preferably, it contains one or more of the following: alicyclic epoxy resin, bisphenol A-type epoxy resin and bisphenol F-type epoxy resin. From the viewpoint of further improving the performance balance between low viscosity and flowability of the two-component liquid resin composition, it is even more preferably that it contains alicyclic epoxy resin.

[0479] The alicyclic epoxy resin in the third embodiment preferably contains an alicyclic epoxy resin that is liquid at 25°C, and more preferably contains epoxy-[epoxy-oxaspirocarbon] epoxy resin selected from vinylcyclopentadiene dioxide, vinylcyclohexene monodioxide, vinylcyclohexene dioxide, dicyclopentadiene oxide, 3,4-epoxy-1-[8,9-epoxy-2,4-dioxaspiro[5.5]undecane-3-yl]-cyclohexane, etc. 8-15 [alkyl]-cycloC 5-12 Alkanes; 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylate, 4,5-epoxycyclooctylmethyl-4',5'-epoxycyclooctane carboxylate, etc., epoxy C5-12 cycloalkyl C 1-3 Alkyl-epoxy C 5-12 Cycloalkanes carboxylic esters; bis(2-methyl-3,4-epoxycyclohexylmethyl) adipate, etc. 1-3 Alkyl epoxide C 5-12 cycloalkyl C 1-3 One or more of alkyl dicarboxylic acid esters, more preferably containing epoxy C 5-12 cycloalkyl C 1-3 Alkyl-epoxy C 5-12 Cycloalkane carboxylic esters, more preferably containing 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylic esters.

[0480] As a commercially available product of 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylic acid ester, the product manufactured by Daicel Corporation under the trade name CELLOXIDE#2021P (epoxy equivalent: 128-140) is a preferred choice.

[0481] In the case where the epoxy resin (A) of the third embodiment contains an alicyclic epoxy resin, from the viewpoint of being able to further improve the flowability of the two-component liquid resin composition, when the content of the epoxy resin (A) is set to 100 parts by mass, the content of the alicyclic epoxy resin in the epoxy resin (A) is preferably 50 parts by mass or more, more preferably 60 parts by mass or more, even more preferably 70 parts by mass or more, even more preferably 80 parts by mass or more, even more preferably 90 parts by mass or more, even more preferably 95 parts by mass or more, and the upper limit is not particularly limited, for example, it can be 100 parts by mass or less.

[0482] Furthermore, from the viewpoint of further improving the flowability of the two-component liquid resin composition, when the content of the epoxy resin (A) is set to 100 parts by mass, the content of alicyclic epoxy resin in the epoxy resin (A) is preferably 50 parts by mass or more and 100 parts by mass or less, more preferably 60 parts by mass or more and 100 parts by mass or less, even more preferably 70 parts by mass or more and 100 parts by mass or less, even more preferably 80 parts by mass or more and 100 parts by mass or less, even more preferably 90 parts by mass or more and 100 parts by mass or less, and even more preferably 95 parts by mass or more and 100 parts by mass or less.

[0483] From the viewpoint of further improving the balance of performance in terms of strength, hardness, elastic modulus, coefficient of thermal expansion, thermal conductivity, heat dissipation, and electrical properties of the cured two-component liquid resin composition, when the total content of the two-component liquid resin composition is set to 100% by mass, the content of epoxy resin (A) in the two-component liquid resin composition of the third embodiment is preferably 3% by mass or more, more preferably 4% by mass or more, even more preferably 3% by mass or more, even more preferably 5% by mass or more, even more preferably 6% by mass or more. Moreover, from the viewpoint of further improving the balance of performance in terms of storage stability and flowability of the two-component liquid resin composition, it is preferably 30% by mass or less, more preferably 28% by mass or less, even more preferably 25% by mass or less, even more preferably 23% by mass or less, even more preferably 20% by mass or less, even more preferably 18% by mass or less, even more preferably 15% by mass or less, even more preferably 13% by mass or less.

[0484] Furthermore, from the viewpoint of further improving the balance of performance in terms of the storage stability, flowability, strength, hardness, elastic modulus, coefficient of thermal expansion, thermal conductivity, heat dissipation, and electrical properties of the two-component liquid resin composition, when the total content of the two-component liquid resin composition is set to 100% by mass, the content of epoxy resin (A) in the two-component liquid resin composition is preferably 3% by mass or more and 30% by mass or less, more preferably 3% by mass or more and 28% by mass or less, even more preferably 3% by mass or more and 25% by mass or less, even more preferably 3% by mass or more and 23% by mass or less, even more preferably 4% by mass or more and 20% by mass or less, even more preferably 3% by mass or more and 18% by mass or less, even more preferably 5% by mass or more and 15% by mass or less, even more preferably 6% by mass or more and 13% by mass or less.

[0485] (Acid anhydride (B))

[0486] The two-component liquid resin composition of the third embodiment contains an acid anhydride (B). The acid anhydride (B) functions as a curing agent for the epoxy resin (A).

[0487] As the third embodiment, the acid anhydride (B), from the viewpoint of improving the curability of the two-component liquid resin composition, preferably contains an anhydride selected from dodecenyl succinic anhydride, polyadipic anhydride, polyazelic anhydride, polysedimentic anhydride, poly(ethyl octadecanoic acid) anhydride, poly(phenyl hexadecanoic acid) anhydride, methyl tetrahydrophthalic anhydride, methyl hexahydrophthalic anhydride, hexahydrophthalic anhydride, methyl succinic anhydride, tetrahydrophthalic anhydride, trialkyl tetrahydrophthalic anhydride, methyl cyclohexene dicarboxylic anhydride, phthalic anhydride, trimellitic anhydride, pyromellitic anhydride, benzophenone tetracarboxylic anhydride, ethylene glycol ditriptyltrihydride, chlorobrittle anhydride, tetrahydrophthalic anhydride, methyl nadic anhydride (methyl-5-norbornene). From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, it is more preferable to contain one or more selected from methyl-5-norbornene-2,3-dicarboxylic anhydride, methyl cyclohexane-1,2,3,6-tetrahydrophthalic anhydride, methyl cyclohexane-1,2-dicarboxylic anhydride, methyl cyclohexane-1,2-dicarboxylic anhydride, and methyl tetrahydrophthalic anhydride, and even more preferably to contain methyl-5-norbornene-2,3-dicarboxylic anhydride.

[0488] When the entire two-component liquid resin composition is set to 100% by mass, from the viewpoint of improving the curability of the two-component liquid resin composition, the content of acid anhydride (B) in the two-component liquid resin composition of the third embodiment is preferably 5% by mass or more, more preferably 7% by mass or more, even more preferably 9% by mass or more, and even more preferably 10% by mass or more. Moreover, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, it is preferably 20% by mass or less, more preferably 18% by mass or less, even more preferably 16% by mass or less, and even more preferably 14% by mass or less.

[0489] Furthermore, when the entire two-component liquid resin composition is set to 100% by mass, from the viewpoint of improving the balance of performance in terms of storage stability, flowability and curability of the two-component liquid resin composition, the content of acid anhydride (B) in the two-component liquid resin composition is preferably 5% by mass or more and 20% by mass or less, more preferably 7% by mass or more and 18% by mass or less, even more preferably 9% by mass or more and 16% by mass or less, and even more preferably 10% by mass or more and 14% by mass or less.

[0490] (Inorganic filler material (C))

[0491] The two-component liquid resin composition of the third embodiment contains an inorganic filler (C). From the viewpoint of achieving a balance between the strength, hardness, elastic modulus, coefficient of thermal expansion, thermal conductivity, heat dissipation, and electrical properties of the cured two-component liquid resin composition, the inorganic filler (C) preferably contains one or more selected from silica, alumina, zircon, iron oxide, zinc oxide, titanium oxide, silicon nitride, boron nitride, aluminum nitride, silicon carbide, glass fiber, glass flakes, alumina fiber, carbon fiber, graphite, carbon black, ferrite, aluminum hydroxide, magnesium hydroxide, calcium carbonate, manganese carbonate, magnesium carbonate, barium sulfate, potassium titanate, calcium silicate, inorganic hollow microspheres, and silver powder. From the viewpoint of achieving a balance between the storage stability and flowability of the two-component liquid resin composition, it is more preferably to contain one or more selected from silica, alumina, aluminum hydroxide, and calcium carbonate. Furthermore, the inorganic filler (C) can be surface-treated. Examples of surface treatments include alkylation, trimethylsilanization, silicone treatment, and treatment using silane coupling agents, but there are no particular limitations.

[0492] From the viewpoint of being able to further improve the balance of performance in terms of strength, hardness, elastic modulus, coefficient of thermal expansion, thermal conductivity, heat dissipation and electrical properties of the cured two-component liquid resin composition, the inorganic filler material (C) in the third embodiment is preferably fibrous, amorphous or spherical, and from the viewpoint of being able to further improve the balance of performance in terms of storage stability and flowability of the two-component liquid resin composition, it is more preferably spherical.

[0493] Here, the sphere can be a perfect sphere, an ellipse, or a generally spherical shape including an oval shape. The aspect ratio (ratio of major axis to minor axis) of the inorganic filler material (C) in the third embodiment is preferably 1.3 or less, more preferably 1.2 or less, and even more preferably 1.1 or less.

[0494] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the average particle size D of the inorganic filler material (C) in the third embodiment when the cumulative value of the volume frequency particle size distribution measured by laser diffraction scattering method reaches 50% is... 50Preferably, the micrometer is 0.5 μm or more, more preferably 1.0 μm or more, even more preferably 3.0 μm or more, even more preferably 5.0 μm or more, even more preferably 7.0 μm or more, even more preferably 10.0 μm or more, even more preferably 12.0 μm or more, even more preferably 15.0 μm or more, even more preferably 17.0 μm or more, even more preferably 20.0 μm or more, and preferably 100.0 μm or less, more preferably 90.0 μm or less, even more preferably 80.0 μm or less, even more preferably 70.0 μm or less, even more preferably 60.0 μm or less, even more preferably 50.0 μm or less, even more preferably 40.0 μm or less, even more preferably 30.0 μm or less.

[0495] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of two-component liquid resin compositions, the average particle size D 50 Preferably, the micrometer is 0.5 μm or more and 100.0 μm or less; more preferably, 1.0 μm or more and 100.0 μm or less; even more preferably, 3.0 μm or more and 100.0 μm or less; even more preferably, 5.0 μm or more and 90.0 μm or less; even more preferably, 7.0 μm or more and 80.0 μm or less; even more preferably, 10.0 μm or more and 70.0 μm or less; even more preferably, 12.0 μm or more and 60.0 μm or less; even more preferably, 15.0 μm or more and 50.0 μm or less; even more preferably, 17.0 μm or more and 40.0 μm or less; even more preferably, 20.0 μm or more and 30.0 μm or less.

[0496] The inorganic filler material (C) in the third embodiment can be in the above-mentioned average particle size D 50 The range contains two or more particles with different average particle sizes D. 50 Inorganic filler materials.

[0497] The average particle size D of the inorganic filler material (C) in the third embodiment 50 For example, measurements can be performed using a laser diffraction scattering measurement method with a laser diffraction particle size distribution measuring device (e.g., the SALD-7000 manufactured by Shimadzu Corporation).

[0498] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, when the total content of the two-component liquid resin composition is set to 100% by mass, the content of inorganic filler material (C) in the two-component liquid resin composition of the third embodiment is preferably 65% ​​by mass or more, more preferably 67% by mass or more, even more preferably 69% by mass or more, even more preferably 71% by mass or more, even more preferably 73% by mass or more, and preferably 75% by mass or more, and preferably 85% by mass or less, more preferably 84% by mass or less, even more preferably 83% by mass or less, and even more preferably 82% by mass or less.

[0499] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, when the total content of the two-component liquid resin composition is set to 100% by mass, the content of inorganic filler material (C) in the two-component liquid resin composition is preferably 65% ​​by mass or more and 85% by mass or less, more preferably 67% by mass or more and 85% by mass or less, even more preferably 69% by mass or more and 85% by mass or less, even more preferably 71% by mass or more and 84% by mass or less, even more preferably 73% by mass or more and 83% by mass or less, and even more preferably 75% by mass or more and 82% by mass or less.

[0500] From the viewpoint of further improving the balance between the storage stability and flowability of the first liquid, when the first liquid as a whole is set to 100% by mass, the content of inorganic filler material (C) in the first liquid of the third embodiment is preferably 65% ​​by mass or more, more preferably 67% by mass or more, even more preferably 69% by mass or more, even more preferably 71% by mass or more, even more preferably 73% by mass or more, even more preferably 75% by mass or more, even more preferably 77% by mass or more, and preferably 95% by mass or less, more preferably 93% by mass or less, even more preferably 91% by mass or less, even more preferably 88% by mass or less.

[0501] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the first liquid, when the first liquid as a whole is set to 100% by mass, the content of inorganic filler material (C) in the first liquid is preferably 65% ​​by mass or more and 95% by mass or less, more preferably 67% by mass or more and 95% by mass or less, even more preferably 69% by mass or more and 95% by mass or less, even more preferably 71% by mass or more and 95% by mass or less, even more preferably 73% by mass or more and 93% by mass or less, even more preferably 75% by mass or more and 91% by mass or less, even more preferably 77% by mass or more and 88% by mass or less.

[0502] From the viewpoint of further improving the balance between the storage stability and flowability of the second liquid, when the second liquid as a whole is set to 100% by mass, the content of inorganic filler material (C) in the second liquid of the third embodiment is preferably 65% ​​by mass or more, more preferably 67% by mass or more, even more preferably 69% by mass or more, even more preferably 71% by mass or more, even more preferably 73% by mass or more, and preferably 85% by mass or less, more preferably 83% by mass or less, even more preferably 81% by mass or less, even more preferably 79% by mass or less, even more preferably 77% by mass or less.

[0503] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the second liquid, when the second liquid as a whole is set to 100% by mass, the content of inorganic filler material (C) in the second liquid is preferably 65% ​​by mass or more and 85% by mass or less, more preferably 67% by mass or more and 83% by mass or less, even more preferably 69% by mass or more and 81% by mass or less, even more preferably 71% by mass or more and 79% by mass or less, and even more preferably 73% by mass or more and 77% by mass or less.

[0504] (Anti-settling agent (D))

[0505] The anti-settling agent (D) of the third embodiment preferably contains one or more selected from inorganic thickeners (but excluding the inorganic filler material (C) mentioned above) and dispersants, and more preferably contains inorganic thickeners.

[0506] By including one or more inorganic thickeners and dispersants as anti-settling agents (D), the sedimentation of inorganic filler material (C) in a two-component liquid resin composition can be further suppressed.

[0507] Inorganic thickeners

[0508] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the inorganic thickener of the third embodiment preferably contains layered inorganic minerals.

[0509] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the layered inorganic minerals in the third embodiment preferably contain one or more selected from clay and talc, and more preferably contain organic clay.

[0510] The clay in the third embodiment preferably contains one or more of the following: kaolin, montmorillonite, illite, bentonite (montmorillonite), lithium montmorillonite, pyrophyllite, attapulgite, sepiolite, and labucite. From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, it is more preferably to contain bentonite.

[0511] Furthermore, the organic clay in the third embodiment preferably contains one or more selected from organic kaolin, organic montmorillonite, organic illite, organic bentonite (organic montmorillonite), organic lithium montmorillonite, organic pyrophyllite, organic attapulgite, organic sepiolite, and organic labucite. From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, it is more preferable to contain organic bentonite, even more preferable to contain bentonite that has undergone ion exchange with a quaternary ammonium salt, even more preferable to contain bentonite that has undergone ion exchange with a quaternary alkyl ammonium salt, even more preferable to contain bentonite that has undergone ion exchange with a quaternary alkyl ammonium salt containing at least one alkyl group having 6 to 24 carbon atoms, and even more preferable to contain bentonite that has undergone ion exchange with a quaternary alkyl ammonium salt containing at least one alkyl group having 12 to 22 carbon atoms.

[0512] Here, organic clay refers to clay obtained by embedding organic compounds between the layers of layered silicate planes. The layered crystal structure is maintained between the layered silicate planes by the presence of intermediate cations, such as sodium or calcium ions. Through ion exchange between these intermediate cations and organic cations, the organic compounds are chemically bonded to the surface of the silicate planes and inserted into the interlayer.

[0513] In the organic clay, the organic compound that has undergone ion exchange with the intermediate layer cation preferably contains a quaternary ammonium salt, more preferably a quaternary alkyl ammonium salt, even more preferably a quaternary alkyl ammonium salt containing at least one alkyl group having 6 to 24 carbon atoms, even more preferably a quaternary alkyl ammonium salt containing at least one alkyl group having 12 to 22 carbon atoms, and even more preferably contains one or more of the following: trimethylstearyl ammonium salt, dimethylstearylbenzyl ammonium salt, dimethyloctadecyl ammonium salt, oleyl bis(2-hydroxyethyl)methyl ammonium salt, dimethylstearyl ammonium salt, benzyl dimethylstearyl ammonium salt, and dimethyl distearate ammonium salt.

[0514] Commercially available organic bentonite products used in the third embodiment include, for example, BENTON34, BENTON SD-1, BENTON SD-2, BENTON SD-3, BENTON57, and BENTON52 manufactured by ELEMENTIS Corporation; Esben NX, Esben N400, Esben WX, Esben NZ, Esben, Esben W, Esben C, Esben E, Esben NZ70, Esben NTO, Esben NX80, Esben NO12S, Esben NEZ, Esben NO12, and Esben NE manufactured by HOJUN Co., Ltd.; and KUNIBIS 110, KUNIBIS 120, and KUNIBIS 127 manufactured by KUNIMINE INDUSTRIESCO., LTD.

[0515] Commercially available products of organolithium montmorillonite used in the third embodiment include, for example, BENTON27 and BENTON38 manufactured by ELEMENTIS.

[0516] Dispersant

[0517] As a dispersant in the third embodiment, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, it is preferable to contain an ester compound containing a long-chain hydrocarbon group; more preferably, it contains one or more selected from carboxylic acid ester compounds containing long-chain hydrocarbon groups, phosphate ester compounds containing long-chain hydrocarbon groups, sulfate ester compounds containing long-chain hydrocarbon groups, nitrate ester compounds containing long-chain hydrocarbon groups, and carbonate compounds containing long-chain hydrocarbon groups; and even more preferably, it contains one or more selected from carboxylic acid ester compounds containing long-chain hydrocarbon groups and phosphate ester compounds containing long-chain hydrocarbon groups.

[0518] It can be considered that such ester compounds containing long-chain hydrocarbon groups can suppress the secondary aggregation of inorganic filler material (C) through the steric hindrance generated by the long-chain hydrocarbon groups, thus further improving the balance between the storage stability and flowability of the two-component liquid resin composition.

[0519] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the long-chain hydrocarbon group in the ester compound containing the long-chain hydrocarbon group in the third embodiment preferably contains one or more of one, two or three aryl groups selected from alkylene, alkyl, alkenyl, aralkyl, aryl and hydrocarbon hydrogen atoms that are substituted by substituents, and more preferably contains one or more of one or more of alkylene, alkyl and alkenyl groups.

[0520] Long-chain hydrocarbon groups can be straight-chain or branched. Regarding long-chain hydrocarbon groups, some of the hydrogen atoms can be replaced by substituents such as hydroxyl, aldehyde, carbonyl, carboxyl, amino, nitro, sulfonyl, and halogenated groups. Long-chain hydrocarbon groups may contain oxygen-containing linking groups such as ether bonds and ester bonds within their long chains.

[0521] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the ester group in the ester compound containing the long-chain hydrocarbon group in the third embodiment preferably contains one or more selected from carboxylic acid ester group, phosphate ester group, sulfate ester group, nitrate ester group and carbonate group, and more preferably contains one or more selected from carboxylic acid ester group and phosphate ester group.

[0522] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the number of carbon atoms of the long-chain hydrocarbon group in the ester compound containing the long-chain hydrocarbon group in the third embodiment is preferably 4 or more, more preferably 6 or more, even more preferably 8 or more, even more preferably 10 or more, and preferably 1000 or less, more preferably 800 or less, even more preferably 600 or less, even more preferably 400 or less, and even more preferably 200 or less.

[0523] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the number of carbon atoms in the long-chain hydrocarbon group is preferably 4 or more and 1000 or less, more preferably 4 or more and 800 or less, even more preferably 6 or more and 600 or less, even more preferably 8 or more and 400 or less, and even more preferably 10 or more and 200 or less.

[0524] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the mass-average molecular weight of the ester compound containing long-chain hydrocarbon groups in the third embodiment is preferably 300 or more, more preferably 400 or more, even more preferably 500 or more, even more preferably 600 or more, even more preferably 700 or more, even more preferably 800 or more, and preferably 50,000 or less, more preferably 30,000 or less, even more preferably 15,000 or less, and even more preferably 10,000 or less.

[0525] Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the mass-average molecular weight of the ester compound is preferably 300 or more and 50,000 or less, more preferably 400 or more and 50,000 or less, even more preferably 500 or more and 50,000 or less, even more preferably 600 or more and 30,000 or less, even more preferably 700 or more and 15,000 or less, and even more preferably 800 or more and 10,000 or less.

[0526] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the ester compound containing long-chain hydrocarbon groups in the third embodiment preferably contains one or more selected from polyhydroxycarboxylic acid esters, acidic phosphate esters, and polymer modifiers containing carboxyl groups.

[0527] From the viewpoint of being able to further improve the balance between the storage stability and flowability of the two-component liquid resin composition, the polyhydroxycarboxylic acid ester of the third embodiment preferably contains a compound represented by the following general formula (Ic).

[0528]

[0529] In the above general formula (Ic), v and y are independently 1 or 2, w is an integer greater than 0 and less than 10, and x is an integer greater than 14 and less than 40. Additionally, -(CH=CH) w -(CH2) x - It can be a segmental structure with w consecutive (CH=CH) followed by x consecutive (CH2) connections, or it can be a random structure with (CH=CH) and (CH2) arranged randomly.

[0530] In the above general formula (Ic), from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, w is preferably an integer of 0 to 8. Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, x is preferably an integer of 18 to 36.

[0531] Commercially available polyhydroxycarboxylic acid esters as a third embodiment include, for example, BYK-R606 manufactured by BYK Japan KK.

[0532] From the viewpoint of being able to further improve the balance between the storage stability and flowability of the two-component liquid resin composition, the acidic phosphate ester of the third embodiment preferably contains a compound represented by the following general formula (IIc).

[0533]

[0534] In the above general formula (IIc), R1 is a saturated or unsaturated hydrocarbon group with 4 to 20 carbon atoms, R2 is a saturated hydrocarbon subgroup with 1 to 20 carbon atoms, R3 is a saturated hydrocarbon subgroup with 2 or 3 carbon atoms, and R4 is a saturated or unsaturated hydrocarbon subgroup with 1 to 8 carbon atoms. k, l, and m are integers between 0 and 20, and n is 1 or 2. When multiple R1s exist, they can be the same or different; when multiple R2s exist, they can be the same or different; when multiple R3s exist, they can be the same or different; and when multiple R4s exist, they can be the same or different. The order of k -COR2O- groups, l -R3O- groups, and m -COR4COO- groups is arbitrary. In the case of n=2, there are 2 R1O (COR2O) groups. k (R3O) l (COR4COO) m The bases can be the same or different.

[0535] In the above general formula (IIc), R1 is not particularly limited as long as it is a saturated or unsaturated hydrocarbon group with 4 to 20 carbon atoms. R1 preferably contains one or more of saturated and unsaturated hydrocarbon groups. The saturated hydrocarbon group preferably contains one or more of octyl, 2-ethylhexyl, nonyl, decyl, undecyl, dodecyl, tetradecyl, hexadecyl, and octadecyl. The unsaturated hydrocarbon group preferably contains one or more of phenyl and nonylphenyl. From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the number of carbon atoms in R1 is preferably 6 to 18, and when k=l=m=0, the number of carbon atoms in R1 is preferably 10 to 18.

[0536] In the above general formula (IIc), R2 is a saturated hydrocarbon group having 1 to 20 carbon atoms. The number of carbon atoms in R2 is preferably 1 to 16. From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, R2 preferably contains one or more of methylene, ethylene, pentylene, tetradecylene, and pentadecylene.

[0537] In the above general formula (IIc), R3 is a saturated hydrocarbon group with 2 or 3 carbon atoms. From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, R3 is preferably a saturated hydrocarbon group with 2 carbon atoms, and more preferably an ethylene group.

[0538] In the above general formula (IIc), R4 is a saturated or unsaturated hydrocarbon group having 1 to 8 carbon atoms. The number of carbon atoms in R4 is preferably 1 to 6. From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, R4 preferably contains one or more of methylene, ethylene, propylene, butylene, amylene, and phenyl.

[0539] In the above general formula (IIc), from the viewpoint of being able to further improve the balance between the storage stability and flowability of the two-component liquid resin composition, k, l and m are preferably integers from 0 to 10.

[0540] In the above general formula (IIc), the monomer units expressed together with k, l, and m—namely, k -COR2O- groups, l -R3O- groups, and m -COR4COO- groups—are arranged arbitrarily between the R1O- group and the phosphorus atom. These groups do not necessarily need to be arranged according to general formula (IIc). Furthermore, -(COR2O) k (R3O) l (COR4COO) m -The group can be a block copolymer or a random copolymer.

[0541] Commercially available acidic phosphate esters as a third embodiment include, for example, BYK-W9010 manufactured by BYK Japan KK Co., Ltd.

[0542] The third embodiment of the carboxyl-containing polymer modifier contains an ester compound of an α-olefin-maleic anhydride copolymer and a monohydric alcohol. The arrangement of the hydrophobic sites, such as the hydrocarbon groups derived from α-olefins, and the hydrophilic sites, such as the carboxyl groups formed by the ring-opening addition of maleic anhydride groups, in such ester compounds is controlled.

[0543] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the α-olefin constituting the ester compound of the α-olefin-maleic anhydride copolymer and monohydric alcohol in the third embodiment preferably contains a straight-chain or branched unsaturated hydrocarbon with 6 or more carbon atoms, and more preferably contains an unsaturated hydrocarbon with 6 or more but less than 30 carbon atoms. The unsaturated hydrocarbon with 6 or more but less than 30 carbon atoms preferably contains one or more of 1-dodecene and 1-tetradecene.

[0544] From the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the monohydric alcohol in the ester compound of the α-olefin-maleic anhydride copolymer and monohydric alcohol constituting the third embodiment preferably contains one or more of aliphatic alcohols, aromatic alcohols and polyalkylene glycol monoalkyl ethers.

[0545] The aliphatic alcohol in the third embodiment preferably contains one or more selected from cetyl alcohol and stearyl alcohol.

[0546] The aromatic alcohol in the third embodiment preferably contains one or more selected from 1-phenyl-1-propanol and α-phenoxy-2-propanol.

[0547] The polyalkylene glycol monoalkyl ether in the third embodiment preferably contains polyethylene glycol monoalkyl ether with a molecular weight of 400 to 700.

[0548] The acid value of the carboxyl-containing polymer modifier in the third embodiment is preferably 10 mg KOH / g or more and 100 mg KOH / g or less, more preferably 15 mg KOH / g or more and 60 mg KOH / g or less.

[0549] Commercially available products containing carboxyl groups as a third embodiment of polymer modification include, for example, FLOREN G-700, FLOREN G-900, FLORENG-1500, and NC-500 manufactured by Kyoeisha Chemical Co., Ltd.

[0550] When the entire two-component liquid resin composition is set to 100% by mass, from the viewpoint of further suppressing the sedimentation of the inorganic filler (C) in the two-component liquid resin composition, the content of the anti-settling agent (D) in the two-component liquid resin composition of the third embodiment is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, even more preferably 0.05% by mass or more, and even more preferably 0.08% by mass or more. Moreover, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, it is preferably 2.00% by mass or less, more preferably 1.50% by mass or less, even more preferably 1.00% by mass or less, even more preferably 0.80% by mass or less, even more preferably 0.50% by mass or less, even more preferably 0.30% by mass or less, even more preferably 0.20% by mass or less, and even more preferably 0.15% by mass or less.

[0551] Furthermore, when the entire two-component liquid resin composition is set to 100% by mass, from the viewpoint of further suppressing the sedimentation of the inorganic filler (C) in the two-component liquid resin composition and from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, the content of the anti-settling agent (D) in the two-component liquid resin composition is preferably 0.01% by mass or more than 2.00% by mass, more preferably 0.01% by mass or more than 1.50% by mass, even more preferably 0.01% by mass or more than 1.00% by mass, even more preferably 0.01% by mass or more than 0.80% by mass, even more preferably 0.01% by mass or more than 0.50% by mass, even more preferably 0.03% by mass or more than 0.30% by mass, even more preferably 0.05% by mass or more than 0.20% by mass, and even more preferably 0.08% by mass or more than 0.15% by mass.

[0552] From the viewpoint of being able to suppress the sedimentation of the inorganic filler material (C) in the first liquid, when the first liquid as a whole is set to 100% by mass, the content of the anti-settling agent (D) in the first liquid of the third embodiment is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, even more preferably 0.05% by mass or more, and even more preferably 0.08% by mass or more. Moreover, from the viewpoint of being able to further improve the balance between the storage stability and the flowability of the first liquid, it is preferably 2.00% by mass or less, more preferably 1.50% by mass or less, even more preferably 1.00% by mass or less, even more preferably 0.80% by mass or less, even more preferably 0.50% by mass or less, even more preferably 0.30% by mass or less, even more preferably 0.20% by mass or less, and even more preferably 0.15% by mass or less.

[0553] Furthermore, from the viewpoint of suppressing the sedimentation of the inorganic filler material (C) in the first liquid and from the viewpoint of further improving the balance between the storage stability and flowability of the first liquid, when the first liquid as a whole is set to 100% by mass, the content of the anti-settling agent (D) in the first liquid is preferably 0.01% by mass or more and 2.00% by mass or less, more preferably 0.01% by mass or more and 1.50% by mass or less, even more preferably 0.01% by mass or more and 1.00% by mass or less, even more preferably 0.01% by mass or more and 0.80% by mass or less, even more preferably 0.01% by mass or more and 0.50% by mass or less, even more preferably 0.03% by mass or more and 0.30% by mass or less, even more preferably 0.05% by mass or more and 0.20% by mass or less, even more preferably 0.08% by mass or more and 0.15% by mass or less.

[0554] From the viewpoint of suppressing the sedimentation of the inorganic filler material (C) in the second liquid, when the second liquid as a whole is set to 100% by mass, the content of the anti-settling agent (D) in the second liquid of the third embodiment is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, even more preferably 0.05% by mass or more, and even more preferably 0.08% by mass or more. Moreover, from the viewpoint of further improving the balance between the storage stability and flowability of the second liquid, it is preferably 2.00% by mass or less, more preferably 1.50% by mass or less, even more preferably 1.00% by mass or less, even more preferably 0.80% by mass or less, even more preferably 0.50% by mass or less, even more preferably 0.30% by mass or less, even more preferably 0.20% by mass or less, and even more preferably 0.15% by mass or less.

[0555] Furthermore, from the viewpoint of suppressing the sedimentation of the inorganic filler material (C) in the second liquid and from the viewpoint of further improving the balance between the storage stability and flowability of the second liquid, when the entire second liquid is set to 100% by mass, the content of the anti-settling agent (D) in the second liquid is preferably 0.01% by mass or more and 2.00% by mass or less, more preferably 0.01% by mass or more and 1.50% by mass or less, even more preferably 0.01% by mass or more and 1.00% by mass or less, even more preferably 0.01% by mass or more and 0.80% by mass or less, even more preferably 0.01% by mass or more and 0.50% by mass or less, even more preferably 0.03% by mass or more and 0.30% by mass or less, even more preferably 0.05% by mass or more and 0.20% by mass or less, even more preferably 0.08% by mass or more and 0.15% by mass or less.

[0556] (Cure accelerator (E))

[0557] From the viewpoint that it can promote the reaction between epoxy resin (A) and acid anhydride (B) and thus improve the curability of the two-component liquid resin composition, the two-component liquid resin composition of the third embodiment preferably further contains a curing accelerator (E).

[0558] From the viewpoint of being able to further improve the balance between the storage stability and flowability of the two-component liquid resin composition, the curing accelerator (E) of the third embodiment is preferably included in the second liquid.

[0559] From the viewpoint of improving the curability of the two-component liquid resin composition, the curing accelerator (E) of the third embodiment preferably contains one or more selected from tertiary amines, quaternary ammonium salts, imidazoles, organophosphorus compounds and Lewis acid catalysts, and more preferably contains quaternary ammonium salts.

[0560] The tertiary amine preferably contains one or more of the following: trimethylamine, triethylamine, tripropylamine, tributylamine, and benzyldimethylamine.

[0561] The quaternary ammonium salt preferably contains one or more of the following: an organic acid salt of diazabicycloundecene, such as octanoate of DBU [1,8-diazabicyclo[5.4.0]undecene-7] (manufactured by San-Apro Ltd., trade name: SA102); an organic acid salt of DBN [1,5-diazabicyclo[4.3.0]-5-nonene]; a quaternary ammonium salt as a salt of a tertiary amine and a carboxylic acid (manufactured by San-Apro Ltd., trade name: U-CAT2313); octadecyltrimethylammonium chloride (manufactured by NOFCORPORATION, trade name: Nissan Cation); and tetraalkyl (each alkyl group has 1 to 18 carbon atoms) ammonium salts (e.g., tetraethylammonium bromide, tetrabutylammonium bromide, tetraalkylammonium carboxylates (carboxylic acids have 1 to 12 carbon atoms)).

[0562] From the viewpoint of improving the curability of the two-component liquid resin composition, the curing accelerator (E) of the third embodiment is more preferably an organic acid salt containing diazabicycloundecene.

[0563] The imidazoles preferably contain one or more of the following: 1-benzyl-2-methylimidazolium, 2-ethyl-4-methylimidazolium, 2-undecylimidazolium, 1,2-dimethylimidazolium, and 1-benzyl-2-phenylimidazolium.

[0564] The organophosphorus preferably contains one or more of the following: triphenylphosphine, triphenylphosphine-triphenylborate, tris(p-methoxyphenyl)phosphine, and tetraphenylphosphine-tetraphenylborate.

[0565] The Lewis acid catalyst preferably contains one or more of the following: boron trifluoride amine coordination compound, boron trichloride amine coordination compound, and boron trifluoride ethylamine coordination compound.

[0566] From the viewpoint of improving the curability of the two-component liquid resin composition, when the total content of the two-component liquid resin composition is set to 100% by mass, the content of the curing accelerator (E) in the two-component liquid resin composition of the third embodiment is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.10% by mass or more, even more preferably 0.15% by mass or more, even more preferably 0.20% by mass or more. Furthermore, from the viewpoint of further improving the balance between the storage stability and flowability of the two-component liquid resin composition, it is preferably 1.00% by mass or less, more preferably 0.80% by mass or less, even more preferably 0.50% by mass or less, and even more preferably 0.30% by mass or less.

[0567] Furthermore, from the viewpoint of improving the curability, storage stability, and flowability of the two-component liquid resin composition, when the entire two-component liquid resin composition is set to 100% by mass, the content of the curing accelerator (E) in the two-component liquid resin composition is preferably 0.01% by mass or more and 1.00% by mass or less, more preferably 0.05% by mass or more and 1.00% by mass or less, even more preferably 0.10% by mass or more and 0.80% by mass or less, even more preferably 0.15% by mass or more and 0.50% by mass or less, and even more preferably 0.20% by mass or more and 0.30% by mass or less.

[0568] (Other ingredients)

[0569] The two-component liquid resin composition of the third embodiment may contain coupling agents, colorants such as carbon black, defoamers such as silicone defoamers, flame retardants, etc., as needed.

[0570] From the viewpoint of improving the interfacial strength between epoxy resin (A) and inorganic filler material (C), the coupling agent in the third embodiment preferably contains one or more selected from epoxy silane coupling agents, amino silane coupling agents, ureosilane coupling agents and mercaptosilane coupling agents, and more preferably contains epoxy silane coupling agents.

[0571] The epoxy silane coupling agent preferably contains one or more of γ-glycidoxypropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldimethoxysilane and β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, more preferably γ-glycidoxypropyltrimethoxysilane.

[0572] The aminosilane coupling agent preferably contains one or more of the following: γ-aminopropyltriethoxysilane, γ-aminopropyltrimethoxysilane, N-β-(aminoethyl)γ-aminopropyltrimethoxysilane, N-β-(aminoethyl)γ-aminopropylmethyldimethoxysilane, N-phenyl-γ-aminopropyltriethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, N-β-(aminoethyl)γ-aminopropyltriethoxysilane, N-(6-aminohexyl)3-aminopropyltrimethoxysilane, and N-[3-(trimethoxysilyl)propyl]-1,3-phenylenediamine.

[0573] Urea-based silane coupling agents, for example, contain one or more selected from γ-ureidopropyltriethoxysilane and hexamethyldisilazane.

[0574] From the viewpoint of improving the interfacial strength between epoxy resin (A) and inorganic filler (C), when the total content of the above-mentioned two-component liquid resin composition is set to 100% by mass, the content of coupling agent in the two-component liquid resin composition of the third embodiment is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, even more preferably 0.05% by mass or more, even more preferably 0.08% by mass or more, and preferably 1.00% by mass or less, more preferably 0.80% by mass or less, even more preferably 0.60% by mass or less, even more preferably 0.40% by mass or less, and even more preferably 0.20% by mass or less.

[0575] Furthermore, from the viewpoint of improving the interfacial strength between epoxy resin (A) and inorganic filler (C), when the entire two-component liquid resin composition is set to 100% by mass, the content of coupling agent in the two-component liquid resin composition is preferably 0.01% by mass or more and 1.00% by mass or less, more preferably 0.01% by mass or more and 0.80% by mass or less, even more preferably 0.03% by mass or more and 0.60% by mass or less, even more preferably 0.05% by mass or more and 0.40% by mass or less, and even more preferably 0.08% by mass or more and 0.20% by mass or less.

[0576] The colorant in the third embodiment preferably contains one or more of the following: carbon black, titanium dioxide, barium sulfate, iron black, iron oxide red, aniline black, and alizarin; more preferably, it contains carbon black.

[0577] When the total content of the above-mentioned two-component liquid resin composition is set to 100% by mass, the content of the colorant in the two-component liquid resin composition of the third embodiment is preferably 0.01% by mass or more, more preferably 0.02% by mass or more, even more preferably 0.03% by mass or more, even more preferably 0.04% by mass or more, even more preferably 0.05% by mass or more, and preferably 0.50% by mass or less, more preferably 0.40% by mass or less, even more preferably 0.30% by mass or less, even more preferably 0.20% by mass or less, and even more preferably 0.10% by mass or less.

[0578] Furthermore, when the entire two-component liquid resin composition is set to 100% by mass, the content of the colorant in the two-component liquid resin composition is preferably 0.01% by mass or more and 0.50% by mass or less, more preferably 0.02% by mass or more and 0.40% by mass or less, even more preferably 0.03% by mass or more and 0.30% by mass or less, even more preferably 0.04% by mass or more and 0.20% by mass or less, and even more preferably 0.05% by mass or more and 0.10% by mass or less.

[0579] The defoamer in the third embodiment preferably contains one or more of the following: silicone-based defoamers, fluorinated defoamers, and polymeric defoamers; more preferably, it contains a silicone-based defoamer.

[0580] When the total content of the above-mentioned two-component liquid resin composition is set to 100% by mass, the content of the defoamer in the two-component liquid resin composition of the third embodiment is preferably 0.01% by mass or more, more preferably 0.03% by mass or more, even more preferably 0.05% by mass or more, even more preferably 0.08% by mass or more, and preferably 1.00% by mass or less, more preferably 0.80% by mass or less, even more preferably 0.60% by mass or less, even more preferably 0.40% by mass or less, and even more preferably 0.20% by mass or less.

[0581] Furthermore, when the entire two-component liquid resin composition is set to 100% by mass, the content of the defoamer in the two-component liquid resin composition is preferably 0.01% by mass or more and 1.00% by mass, more preferably 0.01% by mass or more and 0.80% by mass, even more preferably 0.03% by mass or more and 0.60% by mass, even more preferably 0.05% by mass or more and 0.40% by mass, and even more preferably 0.08% by mass or more and 0.20% by mass.

[0582] From the viewpoint of being able to further improve the flame retardancy of the cured product of the two-component liquid resin composition, the flame retardant of the third embodiment preferably contains one or more selected from aluminum hydroxide, magnesium hydroxide, zinc borate, zinc molybdate, antimony trioxide, antimony pentoxide, phosphazene, brominated epoxy resin and brominated polycarbonate.

[0583] From the viewpoint of further improving the flame retardancy of the cured two-component liquid resin composition, when the entire two-component liquid resin composition is set to 100% by mass, the content of the flame retardant in the two-component liquid resin composition of the third embodiment is preferably 1.0% by mass or more and 50% by mass or less, more preferably 5.0% by mass or more and 30% by mass or less.

[0584] (Method for manufacturing a two-component liquid resin composition)

[0585] The method for manufacturing the two-component liquid resin composition according to the third embodiment will be described in detail.

[0586] The two-component liquid resin composition of the third embodiment can be manufactured by thoroughly mixing and stirring the epoxy resin (A), inorganic filler (C), anti-settling agent (D) and other components mentioned above as the first liquid, and the acid anhydride (B), inorganic filler (C), anti-settling agent (D) and other components as the second liquid using known methods.

[0587] In the case where the two-component liquid resin composition of the third embodiment contains a curing accelerator (E), it is preferable that the second liquid contains a curing accelerator (E).

[0588] As a method for mixing and stirring the components in order to obtain the first or second liquid in the two-liquid liquid resin composition of the third embodiment, a method using a mixer such as a stirrer, or a kneading machine such as a roller and a kneader can be cited.

[0589] The two-component liquid resin composition of the third embodiment is used in the form of a mixture of the first and second liquids described above. Methods for mixing the first and second liquids include using a mixer such as a stirrer, or a kneading machine such as a roller or kneader.

[0590] In the two-component liquid resin composition of the third embodiment, from the viewpoint of further improving the performance balance of the two-component liquid resin composition in terms of fluidity, heat resistance during curing, and mechanical properties, when the amount of the first liquid is set to 100 parts by mass, the content of the second liquid when further mixing the first liquid and the second liquid is preferably 50 parts by mass or more, more preferably 60 parts by mass or more, more preferably 70 parts by mass or more, and preferably 150 parts by mass or less, more preferably 130 parts by mass or less, and more preferably 110 parts by mass or less.

[0591] Furthermore, from the viewpoint of further improving the performance balance of the two-component liquid resin composition in terms of fluidity, heat resistance during curing, and mechanical properties, when the amount of the first liquid is set to 100 parts by mass, the content of the second liquid when further mixing the first liquid and the second liquid is preferably 50 parts by mass or more and 150 parts by mass or less, more preferably 60 parts by mass or more and 130 parts by mass or less, and even more preferably 70 parts by mass or more and 110 parts by mass or less.

[0592] <Common descriptions in the first to third embodiments>

[0593] (Uses of two-component liquid resin compositions)

[0594] The two-component liquid resin composition of this embodiment can be preferably used to seal a power module by casting, the power module comprising: a power module substrate including a circuit layer; and a power semiconductor element located on the circuit layer of the power module substrate.

[0595] [Power Module]

[0596] The power module of this embodiment includes: a power module substrate containing a circuit layer; a power semiconductor element located on the circuit layer of the power module substrate; and a sealing material for sealing the power module substrate and the power semiconductor element, wherein the sealing material contains a cured product of the dual-liquid liquid resin composition of this embodiment.

[0597] The power module in this embodiment can be a small to medium-sized power module for home appliances, computers, etc., or a large power module for control of automobiles, railway vehicles, or substations. Preferably, the power module in this embodiment is selected from one or more of rectifiers, frequency converters, regulators, and inverters.

[0598] The power semiconductor element in the power module of this embodiment preferably includes one or more selected from rectifier diodes, power transistors, MOS transistors, insulated gate bipolar transistors (IGBTs), thyristors, gate turn-off thyristors (GTOs), and triac switches, and more preferably includes one or more selected from MOS transistors and insulated gate bipolar transistors (IGBTs).

[0599] The power module of this embodiment can be obtained by casting the aforementioned two-component liquid resin composition of this embodiment onto power semiconductor elements mounted on a power module substrate having circuit layers, in a manner that covers these substrates and power semiconductor elements, and then heating and curing the two-component liquid resin composition. It is preferable to perform vacuum degassing on the two-component liquid resin composition during and / or before and after casting. By performing vacuum degassing, air and other contaminants contained in the two-component liquid resin composition can be removed, thereby obtaining a power module with fewer voids in the cured two-component liquid resin composition.

[0600] The heating method used to cure the two-component liquid resin composition of this embodiment is not particularly limited, and conventionally known methods such as hot air circulation heating, infrared heating, and high-frequency heating can be used.

[0601] From the viewpoint of manufacturing efficiency of the power module, the heating temperature of the power module in this embodiment is preferably 100°C or higher, more preferably 110°C or higher, even more preferably 120°C or higher, and even more preferably 130°C or higher. From the viewpoint of achieving a performance balance that improves the reliability and mechanical strength of the power module, it is preferably 220°C or lower, more preferably 210°C or lower, and even more preferably 200°C or lower.

[0602] From the viewpoint of achieving a performance balance that improves the reliability and mechanical strength of the power module, the heating time of the power module in this embodiment is preferably 30 seconds or more, more preferably 60 seconds or more, and even more preferably 300 seconds or more. From the viewpoint of manufacturing efficiency of the power module, it is preferably 10 hours or less, more preferably 5 hours or less, and even more preferably 3 hours or less.

[0603] The embodiments of the present invention have been described above, but these are merely examples of the present invention, and various configurations other than those described above are also possible. Furthermore, the present invention is not limited to the embodiments described above, and modifications and improvements within the scope of achieving the objectives of the present invention are also included in the present invention.

[0604] Example

[0605] The present invention will be further described in detail below through embodiments, but the present invention is not limited thereto. Here, the embodiments and comparative examples related to the first embodiment of the present invention are Examples 1a to 5a and Comparative Examples 1a to 4a, the embodiments and comparative examples related to the second embodiment of the present invention are Examples 1b to 3b and Comparative Examples 1b to 4b, and the embodiments and comparative examples related to the third embodiment of the present invention are Examples 1c to 3c and Comparative Examples 1c to 2c.

[0606] <Examples and comparative examples related to the first embodiment>

[0607] The components shown in "First Liquid" of Table 1 are mixed in the amounts (parts by mass) shown in Table 1 to obtain the first liquid (main agent). The components shown in "Second Liquid" of Table 1 are mixed in the amounts (parts by mass) shown in Table 1 to obtain the second liquid (curing agent). Then, the first liquid and the second liquid are mixed in the ratio shown in "Mixing Ratio (First Liquid / Second Liquid)" of Table 1 to produce a mixture (liquid resin composition).

[0608] The detailed information for each component in Table 1 is as follows.

[0609] <Epoxy Resin (A)>

[0610] • Epoxy Resin 1a: 3,4-Epoxycyclohexylmethyl-3',4'-Epoxycyclohexanecarboxylic Acid Ester (Alicyclic Epoxy Resin, manufactured by Daicel Corporation, CELLOXIDE 2021P)

[0611] • Epoxy resin 2a: Bisphenol A type epoxy resin (manufactured by Mitsubishi Chemical Corporation, jER828EL)

[0612] • Epoxy Resin 3a: Bisphenol F type epoxy resin (manufactured by Mitsubishi Chemical Corporation, jER807)

[0613] • Epoxy Resin 4a: Aminophenol type epoxy resin (manufactured by Mitsubishi Chemical Corporation, JER630)

[0614] <Acid Anhydride (B)>

[0615] • Anhydride 1a: Methyl nadic anhydride (manufactured by Showa Denko Materials Co., Ltd., MHAC-P)

[0616] <Curing Accelerator (E)>

[0617] • Curing accelerator 1a: DBU-octanoate (manufactured by San-Apro Ltd., U-CATSA102)

[0618] <Inorganic filler materials (C)>

[0619] • Inorganic filler material 1a: Spherical fused silica (manufactured by Denka Company Limited, FB-950, average particle size D) 50 (23μm)

[0620] <Anti-settling agent (D)>

[0621] • Anti-settling agent 1a: Organic bentonite (manufactured by HOJUN Co., Ltd., ESBEN NTO)

[0622] • Anti-settling agent 2a: Organic bentonite (manufactured by ELEMENTIS, BENTON SD-2)

[0623] • Anti-settling agent 3a: Organic bentonite (manufactured by HOJUN Co., Ltd., ESBENN400)

[0624] • Anti-settling agent 4a: Organic bentonite (manufactured by HOJUN Co., Ltd., ESBEN NZ)

[0625] • Anti-settling agent 5a: Nano silica (manufactured by Tokuyama Corporation, REOLOSIL QS20, average particle size D) 50 (12nm)

[0626] <Other Ingredients>

[0627] • Colorant: Carbon black (manufactured by Mitsubishi Chemical Corporation, C5)

[0628] • Coupling agent: Epoxy silane coupling agent (manufactured by Momentive Performance Materials Inc., A-187)

[0629] • Defoamer: Silicone-based defoamer (manufactured by NISSHO SANGYO Co., Ltd., TSA750)

[0630] The average particle size D of the above-mentioned inorganic filler and the above-mentioned anti-settling agent 50 The measured value is the cumulative value of the volume reference particle size distribution obtained by laser diffraction scattering measurement method using a laser diffraction particle size distribution measuring device (manufactured by Shimadzu Corporation, SALD-7000) when it is 50%.

[0631] <Physical Property Evaluation>

[0632] The following physical properties were measured for the first liquid, second liquid, and mixture obtained in each embodiment and comparative example.

[0633] (Viscosity and thixotropy at 25°C)

[0634] For the first liquids obtained in each embodiment and comparative example, the viscosity η at a rotation speed of 5 rpm and a temperature of 25°C was measured using an E-type viscometer and a 3°×R14 conical rotor (rotor number 4). 5A At this point, the viscosity η 5A The measurement results were obtained using the viscosity one minute after the conical rotor set on the E-type viscometer began to rotate.

[0635] Then, the rotation speed was changed to 10 rpm, and the viscosity η of the first liquid was measured using the same method as described above. 10A .

[0636] Then, using the above measurement results, the thixotropy of the first liquid is calculated according to the following formula.

[0637] (Thixotropy of the first liquid) = (Viscosity η) 5A ) / (viscosity η 10A )

[0638] Similarly, the viscosity η of the second liquid and the mixture was measured at a rotation speed of 5 rpm and a temperature of 25°C using the same method as described above. 5B and η 5P Viscosity η at 10 rpm and 25°C 10B and η 10P And thixotropy. The measurement results are shown in Table 1.

[0639] In addition, the statement "cannot be measured" in Table 1 means that the viscosity of the first liquid, the second liquid, and the mixture obtained in each embodiment and each comparative example is high, and the measuring torque exceeds 100%, so the correct measurement value cannot be obtained.

[0640] (Liquidity)

[0641] Apply 0.05 ml of the mixture to a glass plate with a diameter of less than 1 cm. Then, hold the glass plate at a 45° angle at 60°C for 3 minutes. Measure the distance the mixture flows during this period as the flow distance (mm) and evaluate it according to the following criteria. The evaluation results are shown in Table 1.

[0642] A: The flow distance is 30mm or more.

[0643] B: The flow distance is 15mm or more and less than 30mm.

[0644] C: Flow distance less than 15mm.

[0645] (Maintain stability)

[0646] The storage stability of the first and second solutions was evaluated using the following method.

[0647] First, the first liquid was poured into a 120 mL capped polyethylene container to a height of 50–55 mm and the container was capped. The height of the filler sediment (hard cake) deposited at the bottom after 60 °C for 240 hr was measured and evaluated according to the following criteria.

[0648] A: The height of the hardened mass is 0mm.

[0649] B: The height of the hardened mass exceeds 0 mm but is less than 3 mm.

[0650] C: The height of the hardened mass is 3mm or more.

[0651] The storage stability of the second solution was evaluated in the same manner as that of the first solution. The evaluation results are shown in Table 1.

[0652] (Pouring operation)

[0653] The operability of the mixture in casting is evaluated according to the following criteria.

[0654] A: Meets all of the following requirements (1) to (3).

[0655] B: Satisfies any two of the following (Requirement 1) to (Requirement 3).

[0656] C: It satisfies any one of the following (Requirement 1) to (Requirement 3), or it does not satisfy any of them.

[0657] Requirement 1: Viscosity η of the mixture at 25°C 5P and viscosity η 10P All are below 50 Pa·s.

[0658] Requirement 2: The evaluation result of the fluidity of the mixture is "A".

[0659] Requirement 3: The evaluation results of the storage stability of both the first and second solutions are "A".

[0660] [Table 1]

[0661]

[0662] The two-component liquid resin composition of the embodiment related to the first embodiment, wherein the first liquid contains epoxy resin (A), inorganic filler (C) and anti-settling agent (D), and the second liquid contains acid anhydride (B), inorganic filler (C) and anti-settling agent (D), the anti-settling agent (D) containing an inorganic thickener, and the viscosity η of the first liquid is... 5A With a pressure range of 1.0 Pa·s to 50.0 Pa·s, the balance between stability and fluidity is improved.

[0663] <Examples and comparative examples related to the second embodiment>

[0664] The components shown in "First Liquid" of Table 2 are mixed in the amounts (parts by mass) shown in Table 2 to obtain the first liquid (main agent). The components shown in "Second Liquid" of Table 2 are mixed in the amounts (parts by mass) shown in Table 2 to obtain the second liquid (curing agent). Then, the first liquid and the second liquid are mixed in the ratio shown in "Mixing Ratio (First Liquid / Second Liquid)" of Table 2 to produce a mixture (liquid resin composition).

[0665] The detailed information for each component in Table 2 is as follows.

[0666] <Epoxy Resin (A)>

[0667] • Epoxy Resin 1b: 3,4-Epoxycyclohexylmethyl-3',4'-Epoxycyclohexanecarboxylic Acid Ester (Alicyclic Epoxy Resin, manufactured by Daicel Corporation, CELLOXIDE 2021P)

[0668] • Epoxy Resin 2b: Bisphenol A type epoxy resin (manufactured by Mitsubishi Chemical Corporation, jER828EL)

[0669] • Epoxy Resin 3b: Bisphenol F type epoxy resin (manufactured by Mitsubishi Chemical Corporation, jER807)

[0670] • Epoxy Resin 4b: Aminophenol type epoxy resin (manufactured by Mitsubishi Chemical Corporation, JER630)

[0671] <Acid Anhydride (B)>

[0672] • Anhydride 1b: Methyl nadic anhydride (manufactured by Showa Denko Materials Co., Ltd., MHAC-P)

[0673] <Curing Accelerator (E)>

[0674] • Curing accelerator 1b: DBU-octanoate (manufactured by San-Apro Ltd., U-CATSA102)

[0675] <Inorganic filler materials (C)>

[0676] • Inorganic filler material 1b: Spherical fused silica (manufactured by Denka Company Limited, FB-950, average particle size D) 50 (23μm)

[0677] <Anti-settling agent (D)>

[0678] • Anti-settling agent 1b: Polyhydroxycarboxylic acid ester (manufactured by BYK Japan KK., BYK-R606)

[0679] • Anti-settling agent 2b: Acidic phosphate ester (manufactured by BYK Japan KK., BYK-W9010)

[0680] • Anti-settling agent 3b: A polymer modified with carboxyl groups (manufactured by Kyoeisha Chemical Co., Ltd., FLOREN G700)

[0681] • Anti-settling agent 4b: Organic bentonite (manufactured by HOJUN Co., Ltd., ESBENNTO)

[0682] <Other Ingredients>

[0683] • Colorant: Carbon black (manufactured by Mitsubishi Chemical Corporation, C5)

[0684] • Coupling agent: Epoxy silane coupling agent (manufactured by Momentive Performance Materials Inc., A-187)

[0685] • Defoamer: Silicone-based defoamer (manufactured by NISSHO SANGYO Co., Ltd., TSA750)

[0686] The average particle size D of the above inorganic filler materials 50 The measured value is the cumulative value of the volume reference particle size distribution obtained by laser diffraction scattering measurement method using a laser diffraction particle size distribution measuring device (manufactured by Shimadzu Corporation, SALD-7000) when it is 50%.

[0687] <Physical Property Evaluation>

[0688] The following physical properties were measured for the first liquid, second liquid, and mixture obtained in each embodiment and comparative example.

[0689] (Viscosity and thixotropy at 25°C)

[0690] For the first liquids obtained in each embodiment and comparative example, the viscosity η at a rotation speed of 5 rpm and a temperature of 25°C was measured using an E-type viscometer and a 3°×R14 conical rotor (rotor number 4). 5A At this point, the viscosity η 5A The measurement results were obtained using the viscosity one minute after the conical rotor set on the E-type viscometer began to rotate.

[0691] Then, the rotation speed was changed to 10 rpm, and the viscosity η of the first liquid was measured using the same method as described above. 10A .

[0692] Then, using the above measurement results, the thixotropy of the first liquid is calculated according to the following formula.

[0693] (Thixotropy of the first liquid) = (Viscosity η) 5A ) / (viscosity η 10A )

[0694] Similarly, the viscosity η of the second liquid and the mixture was measured at a rotation speed of 5 rpm and a temperature of 25°C using the same method as described above. 5B and η 5P Viscosity η at 10 rpm and 25°C 10B and η 10P And thixotropy. The measurement results are shown in Table 2.

[0695] In addition, the statement "cannot be measured" in Table 2 means that the viscosity of the first liquid, the second liquid, and the mixture obtained in each embodiment and each comparative example is high, and the measuring torque exceeds 100%, so the correct measurement value cannot be obtained.

[0696] (Liquidity)

[0697] Apply 0.05 ml of the mixture to a glass plate with a diameter of less than 1 cm. Then, hold the glass plate at a 45° angle at 60°C for 3 minutes. Measure the distance the mixture flows during this period as the flow distance (mm) and evaluate it according to the following criteria. The evaluation results are shown in Table 2.

[0698] A: The flow distance is 30mm or more.

[0699] B: The flow distance is 15mm or more and less than 30mm.

[0700] C: Flow distance less than 15mm.

[0701] (Maintain stability)

[0702] The storage stability of the first and second solutions was evaluated using the following method.

[0703] First, the first liquid was poured into a 120 mL capped polyethylene container to a height of 50–55 mm and the container was capped. The height of the filler sediment (hardening) that settled at the bottom after 60 °C for 240 hr was measured and evaluated according to the following criteria.

[0704] A: The height of the hardened mass is 0mm.

[0705] B: The height of the hardened mass exceeds 0 mm but is less than 3 mm.

[0706] C: The height of the hardened mass is 3mm or more.

[0707] The storage stability of the second solution was evaluated in the same manner as that of the first solution. The evaluation results are shown in Table 2.

[0708] (Pouring operation)

[0709] The operability of the mixture in casting is evaluated according to the following criteria.

[0710] A: Meets all of the following requirements (1) to (3).

[0711] B: Satisfies any two of the following (Requirement 1) to (Requirement 3).

[0712] C: It satisfies any one of the following (Requirement 1) to (Requirement 3), or it does not satisfy any of them.

[0713] Requirement 1: Viscosity η of the mixture at 25°C 5P and viscosity η 10P All are below 50 Pa·s.

[0714] Requirement 2: The evaluation result of the fluidity of the mixture is "A".

[0715] Requirement 3: The evaluation results of the storage stability of both the first and second solutions are "A".

[0716] [Table 2]

[0717]

[0718] The two-component liquid resin composition of the embodiment related to the second embodiment, wherein the first liquid contains epoxy resin (A), inorganic filler (C) and anti-settling agent (D), and the second liquid contains acid anhydride (B), inorganic filler (C) and anti-settling agent (D), the anti-settling agent (D) containing a dispersant, and the viscosity η of the first liquid is... 5A With a pressure range of 1.0 Pa·s to 50.0 Pa·s, the balance between stability and fluidity is improved.

[0719] <Examples and comparative examples related to the third embodiment>

[0720] The components shown in "First Liquid" of Table 3 are mixed in the amounts (parts by mass) shown in Table 3 to obtain the first liquid (main agent). The components shown in "Second Liquid" of Table 3 are mixed in the amounts (parts by mass) shown in Table 3 to obtain the second liquid (curing agent). Then, the first liquid and the second liquid are mixed in the ratio shown in "Mixing Ratio (First Liquid / Second Liquid)" of Table 3 to produce a mixture (liquid resin composition).

[0721] The detailed information for each component in Table 3 is as follows.

[0722] <Epoxy Resin (A)>

[0723] • Epoxy Resin 1c: Alicyclic Epoxy Resin (Manufactured by Daicel Corporation, CELLOXIDE 2021P)

[0724] • Epoxy Resin 2c: Bisphenol A type epoxy resin (manufactured by Mitsubishi Chemical Corporation, jER828EL)

[0725] • Epoxy Resin 3c: Bisphenol F type epoxy resin (manufactured by Mitsubishi Chemical Corporation, jER807)

[0726] <Acid Anhydride (B)>

[0727] • Anhydride 1c: Methyl nadic anhydride (manufactured by Showa Denko Materials Co., Ltd., MHAC-P)

[0728] <Curing Accelerator (E)>

[0729] • Curing accelerator 1c: DBU-octanoate (manufactured by San-Apro Ltd., U-CATSA102)

[0730] <Inorganic filler materials (C)>

[0731] • Inorganic filler material 1c: Spherical fused silica (manufactured by Denka Company Limited, FB-950, average particle size D) 50 (23μm)

[0732] <Anti-settling agent (D)>

[0733] • Anti-settling agent 1c: Organic bentonite (manufactured by HOJUN Co., Ltd., ESBENNTO)

[0734] <Other Ingredients>

[0735] • Colorant: Carbon black (manufactured by Mitsubishi Chemical Corporation, C5)

[0736] • Coupling agent: Epoxy silane coupling agent (manufactured by Momentive Performance Materials Inc., A-187)

[0737] • Defoamer: Silicone-based defoamer (manufactured by NISSHO SANGYO Co., Ltd., TSA750)

[0738] The average particle size D of the above inorganic filler materials 50 The measured value is the cumulative value of the volume reference particle size distribution obtained by laser diffraction scattering measurement method using a laser diffraction particle size distribution measuring device (manufactured by Shimadzu Corporation, SALD-7000) when it is 50%.

[0739] <Physical Property Evaluation>

[0740] The following physical properties were measured for the first liquid, second liquid, and mixture obtained in each embodiment and comparative example.

[0741] (Viscosity and thixotropy)

[0742] For the first liquids obtained in each embodiment and comparative example, the viscosity η at a rotation speed of 5 rpm and a temperature of 60°C was measured using an E-type viscometer and a 3°×R14 conical rotor (rotor number 4). 5A At this point, the viscosity η 5A The measurement results were obtained using the viscosity one minute after the conical rotor set on the E-type viscometer began to rotate.

[0743] Then, the rotation speed was changed to 10 rpm, and the viscosity η of the first liquid was measured using the same method as described above. 10A .

[0744] Then, using the above measurement results, the thixotropy of the first liquid is calculated according to the following formula.

[0745] (Thixotropy of the first liquid) = (Viscosity η) 5A ) / (viscosity η 10A )

[0746] Then, the viscosity η of the second liquid obtained in each embodiment and comparative example was measured using an E-type viscometer and a 3°×R14 conical rotor (rotor number 4) at a rotation speed of 5 rpm and a temperature of 25°C. 5B At this point, the viscosity η 5B The measurement results were obtained using the viscosity one minute after the conical rotor set on the E-type viscometer began to rotate.

[0747] Then, the rotation speed was changed to 10 rpm, and the viscosity η of the second liquid was measured using the same method as described above. 10B .

[0748] Then, using the above measurement results, the thixotropy of the second liquid is calculated according to the following formula.

[0749] (Thixotropy of the second liquid) = (Viscosity η) 5B ) / (viscosity η 10B )

[0750] Then, for the mixture of the first and second liquids, under the same conditions as the measurement performed on the first liquid, the viscosity η at a rotation speed of 5 rpm was measured and calculated. 5P Viscosity η at 10 rpm 10P And thixotropy. The measurement results are shown in Table 3.

[0751] In addition, the "cannot be measured" entry in Table 3 indicates that the viscosity of the first and second liquids obtained is high, and the measuring torque exceeds 100%, thus making it impossible to obtain a correct measurement value.

[0752] (Liquidity)

[0753] Apply 0.05 ml of the mixture to a glass plate with a diameter of less than 1 cm. Then, tilt the glass plate at 45° and maintain it at 60°C for 3 minutes. Measure the distance the mixture flows during this period as the flow distance (mm) and evaluate it according to the following criteria. The evaluation results are shown in Table 3.

[0754] A: The flow distance is 30mm or more.

[0755] B: The flow distance is 15mm or more and less than 30mm.

[0756] C: Flow distance less than 15mm.

[0757] (Maintain stability)

[0758] The storage stability of the first and second solutions was evaluated using the following method.

[0759] First, the first liquid was poured into a 120 mL capped polyethylene container to a height of 50–55 mm and the container was capped. The height of the filler sediment (hardening) that settled at the bottom after 60 °C for 240 hr was measured and evaluated according to the following criteria.

[0760] A: The height of the hardened mass is 0mm.

[0761] B: The height of the hardened mass exceeds 0 mm but is less than 3 mm.

[0762] C: The height of the hardened mass is 3mm or more.

[0763] The storage stability of the second solution was evaluated in the same manner as that of the first solution. The evaluation results are shown in Table 3.

[0764] (Pouring operation)

[0765] The operability of the mixture in casting is evaluated according to the following criteria.

[0766] A: Meets all of the following requirements (1) to (3).

[0767] B: Satisfies any two of the following (Requirement 1) to (Requirement 3).

[0768] C: It satisfies any one of the following (Requirement 1) to (Requirement 3), or it does not satisfy any of them.

[0769] Requirement 1: Viscosity η of the mixture at 60°C 5P and viscosity η 10P All are below 30 Pa·s.

[0770] Requirement 2: The evaluation result of the fluidity of the mixture is "A" or "B".

[0771] Requirement 3: The evaluation results of the storage stability of both the first and second solutions are "A".

[0772] [Table 3]

[0773]

[0774] The two-component liquid resin composition of the embodiment comprises an epoxy resin (A), an inorganic filler (C), and an anti-settling agent (D) in the first liquid, and an acid anhydride (B), an inorganic filler (C), and an anti-settling agent (D) in the second liquid. The viscosity η of the first liquid is... 5A With a pressure range of 1.0 Pa·s to 15.0 Pa·s, the balance between stability and fluidity is improved.

[0775] This application claims priority based on Japanese Patent Application Nos. 2023-202588, 2023-202589 and 2023-202591, filed on November 30, 2023, the entire contents of which are incorporated herein by reference.

Claims

1. A two-component liquid resin composition, characterized in that: The two-component liquid resin composition is a two-component liquid resin composition consisting of a first liquid and a second liquid. The first liquid contains epoxy resin (A), inorganic filler (C), and anti-settling agent (D). The second liquid contains acid anhydride (B), inorganic filler material (C), and anti-settling agent (D). The anti-settling agent (D) contains an inorganic thickener, but the inorganic thickener does not include the inorganic filler material (C). The viscosity η of the first liquid measured using an E-type viscometer and a 3° x R14 cone rotor at a rotation speed of 5 rpm and a temperature of 25°C 5A is 1.0 Pa-s or more and 50.0 Pa-s or less.

2. The two-component liquid resin composition according to claim 1, characterized in that: The viscosity η of the first liquid measured using an E-type viscometer and a 3° x R14 cone rotor at a rotation speed of 10 rpm and a temperature of 25°C 10A is 1.0 Pa-s or more and 50.0 Pa-s or less.

3. The two-component liquid resin composition according to claim 2, characterized in that: the viscosity η 5A with respect to the viscosity η 10A the viscosity ratio Ti A is 0.1 or more and 1.5 or less, where Ti A = η 5A / η 10A .

4. The two-component liquid resin composition according to any one of claims 1 to 3, characterized in that: The viscosity η of the second liquid is measured using an E-type viscometer and a 3° x R14 cone rotor at a rotational speed of 5 rpm and a temperature of 25°C 5B is 1.0 Pa-s or more and 50.0 Pa-s or less.

5. The two-component liquid resin composition according to claim 4, characterized in that: The viscosity η of the second liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10B The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

6. The two-component liquid resin composition according to claim 5, characterized in that: The viscosity η 5B Relative to the viscosity η 10B viscosity ratio of Ti B The value is between 0.5 and 2.5, where Ti B =η 5B / η 10B .

7. The two-component liquid resin composition according to any one of claims 1 to 6, characterized in that: The viscosity η of the mixture of the first and second liquids was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5P The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

8. The two-component liquid resin composition according to claim 7, characterized in that: The viscosity η of the mixture of the first and second liquids was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10P The range is 10.0 Pa·s or higher and 50.0 Pa·s or lower.

9. The two-component liquid resin composition according to claim 8, characterized in that: The viscosity η 5P Relative to the viscosity η 10P viscosity ratio of Ti P The values ​​are between 0.5 and 2.0, where Ti P =the 5P / or 10P 。 10. The two-component liquid resin composition according to any one of claims 1 to 9, characterized in that: The inorganic thickener contains one or more selected from layered inorganic minerals and nano-silica.

11. The two-component liquid resin composition according to claim 10, characterized in that: The layered inorganic minerals contain one or more selected from clay and talc.

12. The two-component liquid resin composition according to any one of claims 1 to 11, characterized in that: When the total content of the two-component liquid resin composition is set to 100% by mass, the content of the anti-settling agent (D) is 0.01% by mass or more and 2.00% by mass or less.

13. The two-component liquid resin composition according to any one of claims 1 to 12, characterized in that: The epoxy resin (A) contains an alicyclic epoxy resin.

14. The two-component liquid resin composition according to claim 13, characterized in that: When the content of the epoxy resin (A) is set to 100 parts by mass, the content of the alicyclic epoxy resin is more than 50 parts by mass and less than 100 parts by mass.

15. The two-component liquid resin composition according to any one of claims 1 to 14, characterized in that: When the total content of the two-component liquid resin composition is set to 100% by mass, the content of the epoxy resin (A) is more than 5% by mass and less than 30% by mass.

16. The two-component liquid resin composition according to any one of claims 1 to 15, characterized in that: The anhydride (B) contains one or more of the following: methyl-5-norbornene-2,3-dicarboxylic anhydride, methylcyclohexane-1,2-dicarboxylic anhydride, and methyltetrahydrophthalic anhydride.

17. The two-component liquid resin composition according to any one of claims 1 to 16, characterized in that: When the total content of the two-component liquid resin composition is set to 100% by mass, the content of the acid anhydride (B) is more than 5% by mass and less than 20% by mass.

18. The two-component liquid resin composition according to any one of claims 1 to 17, characterized in that: The inorganic filler material (C) contains one or more of the following: silicon dioxide, aluminum oxide, aluminum hydroxide, and calcium carbonate.

19. The two-component liquid resin composition according to any one of claims 1 to 18, characterized in that: The average particle size D of the inorganic filler material (C) when the cumulative value of the volumetric frequency particle size distribution measured by laser diffraction scattering method reaches 50% is... 50 The range is from 0.5μm to 100.0μm.

20. The two-component liquid resin composition according to any one of claims 1 to 19, characterized in that: When the total content of the two-component liquid resin composition is set to 100% by mass, the content of the inorganic filler material (C) is 65% by mass or more and 85% by mass or less.

21. The two-component liquid resin composition according to any one of claims 1 to 20, characterized in that: It also contains a curing accelerator (E).

22. The two-component liquid resin composition according to claim 21, characterized in that: The curing accelerator (E) contains one or more selected from tertiary amines, quaternary ammonium salts, imidazoles, organophosphorus compounds, and Lewis acid catalysts.

23. The two-component liquid resin composition according to claim 21 or 22, characterized in that: When the total content of the two-component liquid resin composition is set to 100% by mass, the content of the curing accelerator (E) is 0.01% by mass or more and 1.00% by mass or less.

24. A two-component liquid resin composition, characterized in that: The two-component liquid resin composition is a two-component liquid resin composition consisting of a first liquid and a second liquid. The first liquid contains epoxy resin (A), inorganic filler (C), and anti-settling agent (D). The second liquid contains acid anhydride (B), inorganic filler material (C), and anti-settling agent (D). The anti-settling agent (D) contains a dispersant. The viscosity η of the first liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5A The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

25. The two-component liquid resin composition according to claim 24, characterized in that: The viscosity η of the first liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10A The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

26. The two-component liquid resin composition according to claim 25, characterized in that: The viscosity η 5A Relative to the viscosity η 10A viscosity ratio of Ti A The value is between 0.4 and 1.5, where Ti A =η 5A / η 10A .

27. The two-component liquid resin composition according to any one of claims 24 to 26, characterized in that: The viscosity η of the second liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5B The range is 1.0 Pa·s or higher and 70.0 Pa·s or lower.

28. The two-component liquid resin composition according to claim 27, characterized in that: The viscosity η of the second liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10B The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

29. The two-component liquid resin composition according to claim 28, characterized in that: The viscosity η 5B Relative to the viscosity η 10B viscosity ratio of Ti B The values ​​are between 0.5 and 4.0, where Ti B =η 5B / η 10B .

30. The two-component liquid resin composition according to any one of claims 24 to 29, characterized in that: The viscosity η of the mixture of the first and second liquids was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5P The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

31. The two-component liquid resin composition according to claim 30, characterized in that: The viscosity η of the mixture of the first and second liquids was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10P The range is 10.0 Pa·s or higher and 50.0 Pa·s or lower.

32. The two-component liquid resin composition according to claim 31, characterized in that: The viscosity η 5P Relative to the viscosity η 10P viscosity ratio of Ti P The values ​​are between 0.5 and 2.0, where Ti P =the 5P / or 10P 。 33. The two-component liquid resin composition according to any one of claims 24 to 32, characterized in that: The dispersant contains an ester compound comprising a long-chain hydrocarbon group.

34. The two-component liquid resin composition according to claim 33, characterized in that: The ester compound containing long-chain hydrocarbon groups contains one or more of the following: polyhydroxycarboxylic acid esters, acidic phosphate esters, and polymer modifiers containing carboxyl groups.

35. The two-component liquid resin composition according to any one of claims 24 to 34, characterized in that: When the total content of the two-component liquid resin composition is set to 100% by mass, the content of the anti-settling agent (D) is 0.01% by mass or more and 2.0% by mass or less.

36. The two-component liquid resin composition according to any one of claims 24 to 35, characterized in that: The epoxy resin (A) contains an alicyclic epoxy resin.

37. The two-component liquid resin composition according to claim 36, characterized in that: When the content of the epoxy resin (A) is set to 100 parts by mass, the content of the alicyclic epoxy resin is more than 50 parts by mass and less than 100 parts by mass.

38. The two-component liquid resin composition according to any one of claims 24 to 37, characterized in that: When the total content of the two-component liquid resin composition is set to 100% by mass, the content of the epoxy resin (A) is more than 5% by mass and less than 30% by mass.

39. The two-component liquid resin composition according to any one of claims 24 to 38, characterized in that: The anhydride (B) contains one or more of the following: methyl-5-norbornene-2,3-dicarboxylic anhydride, methylcyclohexane-1,2-dicarboxylic anhydride, and methyltetrahydrophthalic anhydride.

40. The two-component liquid resin composition according to any one of claims 24 to 39, characterized in that: When the total content of the two-component liquid resin composition is set to 100% by mass, the content of the acid anhydride (B) is more than 5% by mass and less than 20% by mass.

41. The two-component liquid resin composition according to any one of claims 24 to 40, characterized in that: The inorganic filler material (C) contains one or more of the following: silicon dioxide, aluminum oxide, aluminum hydroxide, and calcium carbonate.

42. The two-component liquid resin composition according to any one of claims 24 to 41, characterized in that: The average particle size D of the inorganic filler material (C) when the cumulative value of the volumetric frequency particle size distribution measured by laser diffraction scattering method reaches 50% is... 50 The range is from 0.5μm to 100μm.

43. The two-component liquid resin composition according to any one of claims 24 to 42, characterized in that: When the total content of the two-component liquid resin composition is set to 100% by mass, the content of the inorganic filler material (C) is 65% by mass or more and 85% by mass or less.

44. The two-component liquid resin composition according to any one of claims 24 to 43, characterized in that: It also contains a curing accelerator (E).

45. The two-component liquid resin composition according to claim 44, characterized in that: The curing accelerator (E) contains one or more selected from tertiary amines, quaternary ammonium salts, imidazoles, organophosphorus compounds, and Lewis acid catalysts.

46. ​​The two-component liquid resin composition according to claim 44 or 45, characterized in that: When the total content of the two-component liquid resin composition is set to 100% by mass, the content of the curing accelerator (E) is 0.01% by mass or more and 1.00% by mass or less.

47. A two-component liquid resin composition, characterized in that: The two-component liquid resin composition is a two-component liquid resin composition consisting of a first liquid and a second liquid. The first liquid contains epoxy resin (A), inorganic filler (C), and anti-settling agent (D). The second liquid contains acid anhydride (B), inorganic filler material (C), and anti-settling agent (D). The viscosity η of the first liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 60°C. 5A The value is above 1.0 Pa·s and below 15.0 Pa·s.

48. The two-component liquid resin composition according to claim 47, characterized in that: The viscosity η of the first liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 60°C. 10A The value is above 1.0 Pa·s and below 15.0 Pa·s.

49. The two-component liquid resin composition according to claim 48, characterized in that: The viscosity η 5A Relative to the viscosity η 10A viscosity ratio of Ti A The range is between 0.1 and 1.5, where Ti A =η 5A / η 10A .

50. The two-component liquid resin composition according to any one of claims 47 to 49, characterized in that: The viscosity η of the second liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 25°C. 5B The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

51. The two-component liquid resin composition according to claim 50, characterized in that: The viscosity η of the second liquid was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 25°C. 10B The range is 1.0 Pa·s or higher and 50.0 Pa·s or lower.

52. The two-component liquid resin composition according to claim 51, characterized in that: The viscosity η 5B Relative to the viscosity η 10B viscosity ratio of Ti B The value is between 0.5 and 2.5, where Ti B =η 5B / η 10B .

53. The two-component liquid resin composition according to any one of claims 47 to 52, characterized in that: The viscosity η of the mixture of the first and second liquids was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 5 rpm and a temperature of 60°C. 5P The range is 1.0 Pa·s or higher and 30.0 Pa·s or lower.

54. The two-component liquid resin composition according to claim 53, characterized in that: The viscosity η of the mixture of the first and second liquids was measured using an E-type viscometer and a 3°×R14 conical rotor at a rotation speed of 10 rpm and a temperature of 60°C. 10P The range is 1.0 Pa·s or higher and 30.0 Pa·s or lower.

55. The two-component liquid resin composition according to claim 54, characterized in that: The viscosity η 5P Relative to the viscosity η 10P viscosity ratio of Ti P The values ​​are between 0.5 and 2.0, where Ti P =the 5P / or 10P 。 56. The two-component liquid resin composition according to any one of claims 47 to 55, characterized in that: The anti-settling agent (D) contains an inorganic thickener, but the inorganic thickener does not include the inorganic filler material (C).

57. The two-component liquid resin composition according to claim 56, characterized in that: The inorganic thickener contains layered inorganic minerals.

58. The two-component liquid resin composition according to claim 57, characterized in that: The layered inorganic minerals contain one or more selected from clay and talc.

59. The two-component liquid resin composition according to any one of claims 47 to 58, characterized in that: When the total content of the two-component liquid resin composition is set to 100% by mass, the content of the anti-settling agent (D) is 0.01% by mass or more and 2.00% by mass or less.

60. The two-component liquid resin composition according to any one of claims 47 to 59, characterized in that: When the total content of the two-component liquid resin composition is set to 100% by mass, the content of the epoxy resin (A) is more than 3% by mass and less than 30% by mass.

61. The two-component liquid resin composition according to any one of claims 47 to 60, characterized in that: The anhydride (B) contains one or more of the following: methyl-5-norbornene-2,3-dicarboxylic anhydride, methylcyclohexane-1,2-dicarboxylic anhydride, and methyltetrahydrophthalic anhydride.

62. The two-component liquid resin composition according to any one of claims 47 to 61, characterized in that: When the total content of the two-component liquid resin composition is set to 100% by mass, the content of the acid anhydride (B) is more than 5% by mass and less than 20% by mass.

63. The two-component liquid resin composition according to any one of claims 47 to 62, characterized in that: The inorganic filler material (C) contains one or more of the following: silicon dioxide, aluminum oxide, aluminum hydroxide, and calcium carbonate.

64. The two-component liquid resin composition according to any one of claims 47 to 63, characterized in that: The average particle size D of the inorganic filler material (C) when the cumulative value of the volumetric frequency particle size distribution measured by laser diffraction scattering method reaches 50% is... 50 The range is from 0.5μm to 100μm.

65. The two-component liquid resin composition according to any one of claims 47 to 64, characterized in that: When the total content of the two-component liquid resin composition is set to 100% by mass, the content of the inorganic filler material (C) is 65% by mass or more and 85% by mass or less.

66. The two-component liquid resin composition according to any one of claims 47 to 65, characterized in that: It also contains a curing accelerator (E).

67. The two-component liquid resin composition according to claim 66, characterized in that: The curing accelerator (E) contains one or more selected from tertiary amines, quaternary ammonium salts, imidazoles, organophosphorus compounds, and Lewis acid catalysts.

68. The two-component liquid resin composition according to claim 66 or 67, characterized in that: When the total content of the two-component liquid resin composition is set to 100% by mass, the content of the curing accelerator (E) is 0.01% by mass or more and 1.00% by mass or less.

69. The two-component liquid resin composition according to any one of claims 1 to 68, characterized in that: The two-component liquid resin composition can be used to seal a power module by casting, the power module comprising: a power module substrate including a circuit layer; and power semiconductor elements located on the circuit layer of the power module substrate.

70. A power module, characterized in that, include: A power module substrate containing a circuit layer; Power semiconductor elements located on the circuit layer of the power module substrate; and A sealing material used to seal the power module substrate and the power semiconductor element. The sealing material contains a cured product of the two-component liquid resin composition according to any one of claims 1 to 68.

71. The power module according to claim 70, characterized in that: The power semiconductor device comprises one or more selected from MOS transistors and insulated gate bipolar transistors (IGBTs).

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