Two-pack type liquid resin composition and power module

Abstract

Disclosed is a two-pack type liquid resin composition which is composed of a first liquid and a second liquid, wherein: the first liquid contains an epoxy resin (A), an inorganic filler (C), and an anti-settling agent (D); the second liquid contains an acid anhydride (B), the inorganic filler (C), and an anti-settling agent (D); the anti-settling agent (D) contains an inorganic thickener (excluding the inorganic filler (C)); and the viscosity η5A of the first liquid is 1.0 Pa∙s to 50.0 Pa∙s inclusive as measured at the rotation speed of 5 rpm and the temperature of 25°C using an E-type viscometer and a 3° × R14 cone rotor.

Description

Two-component liquid resin composition and power module

[0001] The present invention relates to a two-component liquid resin composition and a power module.

[0002] Epoxy resins are used as sealing materials for sealing substrates and semiconductor elements in power modules. Patent Document 1 discloses a technology relating to sealing materials for power modules.

[0003] Patent Document 1 describes a filler for semiconductor encapsulation, which is blended into an encapsulation material to reduce the linear expansion coefficient of the encapsulation material and maintain the encapsulation material at a low viscosity to improve penetration, and a semiconductor encapsulation composition using the filler. The filler is characterized by comprising an inorganic substance and an organic layer chemically bonded to the surface of the inorganic substance and having a functional group capable of reacting with an epoxy resin, and also describes a semiconductor encapsulation material containing the filler and an epoxy resin.

[0004] JP 2009-67890 A

[0005] The present invention provides a two-component liquid resin composition having an improved balance of storage stability and flowability.

[0006] The present inventors have conducted extensive research to achieve the above object, and as a result have found that the performance balance between storage stability and fluidity of a two-component liquid resin composition can be improved by including an inorganic thickener as an anti-settling agent and adjusting the viscosity of the epoxy resin-containing liquid resin composition within a specific range, by including a dispersant as an anti-settling agent and adjusting the viscosity of the epoxy resin-containing liquid resin composition within a specific range, or by including an epoxy resin and an anti-settling agent and adjusting the viscosity of the epoxy resin-containing liquid resin composition within a specific range, and have completed the present invention.

[0007] According to a first embodiment of the present invention, there are provided the following two-component liquid resin composition and power module.

[0008] [1a] A two-component liquid resin composition comprising a first liquid and a second liquid, wherein the first liquid contains an epoxy resin (A), an inorganic filler (C), and an anti-settling agent (D), the second liquid contains an acid anhydride (B), an inorganic filler (C), and an anti-settling agent (D), and the anti-settling agent (D) contains an inorganic thickener (excluding the inorganic filler (C)), and the viscosity η of the first liquid is measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 25°C. ５Ａ [2a] The viscosity η of the first liquid is measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. １０Ａ [3a] The two-component liquid resin composition according to the above [1a], wherein the viscosity η is 1.0 Pa·s or more and 50.0 Pa·s or less. １０Ａ The viscosity η ５Ａ Viscosity ratio Ti Ａ (η ５Ａ / η １０Ａ [4a] The viscosity η of the second liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 25° C. is 0.1 or more and 1.5 or less. ５Ｂ [5a] The viscosity η of the second liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. is 1.0 Pa·s or more and 50.0 Pa·s or less. １０Ｂ [6a] The two-component liquid resin composition according to the above [4a], wherein the viscosity η is 1.0 Pa·s or more and 50.0 Pa·s or less. １０Ｂ The viscosity η ５Ｂ Viscosity ratio Ti Ｂ (η ５Ｂ / η １０Ｂ [7a] The viscosity η of the mixture of the first liquid and the second liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 25° C. is 0.5 or more and 2.5 or less. ５Ｐ[8a] The viscosity η of the mixture of the first and second liquids measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. is 1.0 Pa·s or more and 50.0 Pa·s or less. １０Ｐ [9a] The two-component liquid resin composition according to the above [7a], wherein the viscosity η is 10.0 Pa·s or more and 50.0 Pa·s or less. １０Ｐ The viscosity η ５Ｐ Viscosity ratio Ti Ｐ (η ５Ｐ / η １０ＰThe two-component liquid resin composition according to [8a] above, wherein the value of (A) is 0.5 or more and 2.0 or less. [10a] The two-component liquid resin composition according to any one of [1a] to [9a] above, wherein the inorganic thickener comprises one or more selected from the group consisting of layered inorganic minerals and nanosilica. [11a] The two-component liquid resin composition according to [10a] above, wherein the layered inorganic mineral comprises one or more selected from the group consisting of clay and talc. [12a] The two-component liquid resin composition according to any one of [1a] to [11a] above, wherein the content of the anti-settling agent (D) is 0.01% by mass or more and 2.00% by mass or less, when the total amount of the two-component liquid resin composition is taken as 100% by mass. [13a] The two-component liquid resin composition according to any one of [1a] to [12a] above, wherein the epoxy resin (A) comprises an alicyclic epoxy resin. [14a] The two-component liquid resin composition according to [13a] above, wherein the content of the alicyclic epoxy resin is 50 parts by mass or more and 100 parts by mass or less, relative to 100 parts by mass of the content of the epoxy resin (A). [15a] The two-component liquid resin composition according to any one of [1a] to [14a] above, wherein the content of the epoxy resin (A) is 5% by mass or more and 30% by mass or less, relative to 100 parts by mass of the total two-component liquid resin composition. [16a] The two-component liquid resin composition according to any one of [1a] to [15a] above, wherein the acid anhydride (B) comprises one or more selected from the group consisting of methyl-5-norbornene-2,3-dicarboxylic anhydride, methylcyclohexane-1,2-dicarboxylic anhydride, and methyltetrahydrophthalic anhydride. [17a] The two-component liquid resin composition according to any one of [1a] to [16a] above, wherein the content of the acid anhydride (B) is 5% by mass or more and 20% by mass or less, when the total amount of the two-component liquid resin composition is 100% by mass. [18a] The two-component liquid resin composition according to any one of [1a] to [17a] above, wherein the inorganic filler (C) comprises one or more selected from the group consisting of silica, alumina, aluminum hydroxide, and calcium carbonate. [19a] The average particle diameter D of the inorganic filler (C) at a cumulative value of 50% in a volume frequency particle size distribution measured by a laser diffraction scattering method is ５０[20a] The two-component liquid resin composition according to any one of [1a] to [19a] above, wherein the content of the inorganic filler (C) is 65% by mass or more and 85% by mass or less, when the total mass of the two-component liquid resin composition is 100% by mass. [21a] The two-component liquid resin composition according to any one of [1a] to [20a] above, further comprising a curing accelerator (E). [22a] The two-component liquid resin composition according to [21a] above, wherein the curing accelerator (E) comprises one or more selected from the group consisting of tertiary amines, quaternary ammonium salts, imidazoles, organic phosphines, and Lewis acid catalysts. [23a] The two-component liquid resin composition according to [21a] or [22a] above, wherein the content of the curing accelerator (E) is 0.01% by mass or more and 1.00% by mass or less, when the total amount of the two-component liquid resin composition is taken as 100% by mass. [24a] The two-component liquid resin composition according to any of [1a] to [23a] above, which can be used to encapsulate, by a casting method, a power module comprising a power module substrate including a circuit layer and a power semiconductor element on the circuit layer of the power module substrate. [25a] A power module comprising: a power module substrate including a circuit layer; a power semiconductor element on the circuit layer of the power module substrate; and an encapsulant for encapsulating the power module substrate and the power semiconductor element, wherein the encapsulant comprises a cured product of the two-component liquid resin composition according to any of [1a] to [24a] above. [26a] The power module according to [25a], wherein the power semiconductor element includes one or more types selected from the group consisting of MOS transistors and insulated gate bipolar transistors (IGBTs).

[0009] According to a second embodiment of the present invention, there are provided the following two-component liquid resin composition and power module.

[0010] [1b] A two-component liquid resin composition comprising a first liquid and a second liquid, wherein the first liquid contains an epoxy resin (A), an inorganic filler (C), and an anti-settling agent (D), the second liquid contains an acid anhydride (B), an inorganic filler (C), and an anti-settling agent (D), and the anti-settling agent (D) contains a dispersant, and the viscosity η of the first liquid is measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 25°C. ５Ａ [2b] The viscosity η of the first liquid is measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. １０Ａ [3b] The two-component liquid resin composition according to the above [1b], wherein the viscosity η is 1.0 Pa·s or more and 50.0 Pa·s or less. １０Ａ The viscosity η ５Ａ Viscosity ratio Ti Ａ (η ５Ａ / η １０Ａ [4b] The viscosity η of the second liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 25° C. is 0.4 or more and 1.5 or less. ５Ｂ [5b] The viscosity η of the second liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. is 1.0 Pa·s or more and 70.0 Pa·s or less. １０Ｂ [6b] The two-component liquid resin composition according to the above [4b], wherein the viscosity η is 1.0 Pa·s or more and 50.0 Pa·s or less. １０Ｂ The viscosity η ５Ｂ Viscosity ratio Ti Ｂ (η ５Ｂ / η １０Ｂ [7b] The two-component liquid resin composition according to the above [5b], wherein the viscosity η of the mixture of the first and second components is measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 25° C. ５Ｐ[8b] The viscosity η of the mixture of the first and second liquids measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. is 1.0 Pa·s or more and 50.0 Pa·s or less. １０Ｐ [9b] The two-component liquid resin composition according to the above [7b], wherein the viscosity η is 10.0 Pa·s or more and 50.0 Pa·s or less. １０Ｐ The viscosity η ５Ｐ Viscosity ratio Ti Ｐ (η ５Ｐ / η １０Ｐ) is 0.5 or more and 2.0 or less. [10b] The two-component liquid resin composition according to any one of [1b] to [9b] ​​above, wherein the dispersant comprises an ester compound having a long-chain hydrocarbon group. [11b] The two-component liquid resin composition according to [10b] above, wherein the ester compound having a long-chain hydrocarbon group comprises one or more compounds selected from the group consisting of polyhydroxycarboxylic acid esters, acidic phosphate esters, and modified carboxyl group-containing polymers. [12b] The two-component liquid resin composition according to any one of [1b] to [11b] above, wherein the content of the anti-settling agent (D) is 0.01% by mass or more and 2.0% by mass or less, when the total amount of the two-component liquid resin composition is taken as 100% by mass. [13b] The two-component liquid resin composition according to any one of [1b] to [12b] above, wherein the epoxy resin (A) comprises an alicyclic epoxy resin. [14b] The two-component liquid resin composition according to [13b] above, wherein the content of the alicyclic epoxy resin is 50 parts by mass or more and 100 parts by mass or less, relative to 100 parts by mass of the content of the epoxy resin (A). [15b] The two-component liquid resin composition according to any one of [1b] to [14b] above, wherein the content of the epoxy resin (A) is 5% by mass or more and 30% by mass or less, relative to 100 parts by mass of the total two-component liquid resin composition. [16b] The two-component liquid resin composition according to any one of [1b] to [15b] above, wherein the acid anhydride (B) comprises one or more selected from the group consisting of methyl-5-norbornene-2,3-dicarboxylic anhydride, methylcyclohexane-1,2-dicarboxylic anhydride, and methyltetrahydrophthalic anhydride. [17b] The two-component liquid resin composition according to any one of [1b] to [16b] above, wherein the content of the acid anhydride (B) is 5% by mass or more and 20% by mass or less, when the total amount of the two-component liquid resin composition is 100% by mass. [18b] The two-component liquid resin composition according to any one of [1b] to [17b] above, wherein the inorganic filler (C) comprises one or more selected from the group consisting of silica, alumina, aluminum hydroxide, and calcium carbonate.[19b] The average particle diameter D of the inorganic filler (C) at a cumulative value of 50% in the volume frequency particle size distribution measured by a laser diffraction scattering method. ５０ [20b] The two-component liquid resin composition according to any one of [1b] to [19b] above, wherein the content of the inorganic filler (C) is 65% by mass or more and 85% by mass or less, when the total mass of the two-component liquid resin composition is 100% by mass. [21b] The two-component liquid resin composition according to any one of [1b] to [20b] above, further comprising a curing accelerator (E). [22b] The two-component liquid resin composition according to [21b] above, wherein the curing accelerator (E) comprises one or more selected from the group consisting of tertiary amines, quaternary ammonium salts, imidazoles, organic phosphines, and Lewis acid catalysts. [23b] The two-component liquid resin composition according to [21b] or [22b] above, wherein the content of the curing accelerator (E) is 0.01% by mass or more and 1.00% by mass or less, when the total amount of the two-component liquid resin composition is taken as 100% by mass. [24b] The two-component liquid resin composition according to any of [1b] to [23b] above, which can be used to encapsulate, by a casting method, a power module comprising a power module substrate including a circuit layer and a power semiconductor element on the circuit layer of the power module substrate. [25b] A power module comprising: a power module substrate including a circuit layer; a power semiconductor element on the circuit layer of the power module substrate; and an encapsulant for encapsulating the power module substrate and the power semiconductor element, wherein the encapsulant comprises a cured product of the two-component liquid resin composition according to any of [1b] to [24b] above. [26b] The power module according to [25b], wherein the power semiconductor element includes one or more types selected from the group consisting of MOS transistors and insulated gate bipolar transistors (IGBTs).

[0011] According to a third embodiment of the present invention, there are provided the following two-component liquid resin composition and power module.

[0012] [1c] A two-component liquid resin composition consisting of a first liquid and a second liquid, wherein the first liquid contains an epoxy resin (A), an inorganic filler (C), and an anti-settling agent (D), and the second liquid contains an acid anhydride (B), an inorganic filler (C), and an anti-settling agent (D), and the viscosity η of the first liquid is measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 60°C. ５Ａ [2c] The viscosity η of the first liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 60° C. １０Ａ [3c] The two-component liquid resin composition according to [1c] above, wherein the viscosity η is 1.0 Pa·s or more and 15.0 Pa·s or less. １０Ａ The viscosity η ５Ａ Viscosity ratio Ti Ａ (η ５Ａ / η １０Ａ [4c] The viscosity η of the second liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 25° C. is 0.1 or more and 1.5 or less. ５Ｂ [5c] The viscosity η of the second liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. is 1.0 Pa·s or more and 50.0 Pa·s or less. １０Ｂ [6c] The two-component liquid resin composition according to the above [4c], wherein the viscosity η is 1.0 Pa·s or more and 50.0 Pa·s or less. １０Ｂ The viscosity η ５Ｂ Viscosity ratio Ti Ｂ (η ５Ｂ / η １０Ｂ [7c] The two-component liquid resin composition according to the above [5c], wherein the viscosity η of the mixture of the first and second components is measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 60° C. ５Ｐ[8c] The viscosity η of the mixture of the first and second liquids measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 60° C. is 1.0 Pa·s or more and 30.0 Pa·s or less. １０Ｐ [9c] The two-component liquid resin composition according to the above [7c], wherein the viscosity η is 1.0 Pa·s or more and 30.0 Pa·s or less. １０Ｐ The above viscosity η ５Ｐ Viscosity ratio Ti Ｐ (η ５Ｐ / η １０Ｐ) is 0.5 or more and 2.0 or less. [10c] The two-component liquid resin composition according to any one of [1c] to [9c] above, wherein the anti-settling agent (D) comprises an inorganic thickener (excluding the inorganic filler (C)). [11c] The two-component liquid resin composition according to [10c] above, wherein the inorganic thickener comprises a layered inorganic mineral. [12c] The two-component liquid resin composition according to [11c] above, wherein the layered inorganic mineral comprises one or more selected from the group consisting of clay and talc. [13c] The two-component liquid resin composition according to any one of [1c] to [12c] above, wherein the content of the anti-settling agent (D) is 0.01% by mass or more and 2.00% by mass or less, when the total amount of the two-component liquid resin composition is 100% by mass. [14c] The two-component liquid resin composition according to any one of [1c] to [13c] above, wherein the content of the epoxy resin (A) is 3% by mass or more and 30% by mass or less, when the total amount of the two-component liquid resin composition is taken as 100% by mass. [15c] The two-component liquid resin composition according to any one of [1c] to [14c] above, wherein the acid anhydride (B) comprises one or more selected from the group consisting of methyl-5-norbornene-2,3-dicarboxylic anhydride, methylcyclohexane-1,2-dicarboxylic anhydride, and methyltetrahydrophthalic anhydride. [16c] The two-component liquid resin composition according to any one of [1c] to [15c] above, wherein the content of the acid anhydride (B) is 5% by mass or more and 20% by mass or less, when the total amount of the two-component liquid resin composition is taken as 100% by mass. [17c] The two-component liquid resin composition according to any one of [1c] to [16c], wherein the inorganic filler (C) comprises one or more selected from the group consisting of silica, alumina, aluminum hydroxide, and calcium carbonate. [18c] The average particle diameter D of the inorganic filler (C) at a cumulative value of 50% in a volume frequency particle size distribution measured by a laser diffraction scattering method ５０[19c] The two-component liquid resin composition according to any one of [1c] to [17c] above, wherein the average particle size is 0.5 μm or more and 100 μm or less. [19c] The two-component liquid resin composition according to any one of [1c] to [18c] above, wherein the content of the inorganic filler (C) is 65 mass% or more and 85 mass% or less, when the total mass of the two-component liquid resin composition is 100 mass%. [20c] The two-component liquid resin composition according to any one of [1c] to [19c] above, further comprising a curing accelerator (E). [21c] The two-component liquid resin composition according to [20c] above, wherein the curing accelerator (E) comprises one or more selected from the group consisting of tertiary amines, quaternary ammonium salts, imidazoles, organic phosphines, and Lewis acid catalysts. [22c] The two-component liquid resin composition according to [20c] or [21c] above, wherein the content of the curing accelerator (E) is 0.01% by mass or more and 1.00% by mass or less, when the total amount of the two-component liquid resin composition is taken as 100% by mass. [23c] The two-component liquid resin composition according to any of [1c] to [22c] above, which can be used to encapsulate, by a casting method, a power module comprising a power module substrate including a circuit layer and a power semiconductor element on the circuit layer of the power module substrate. [24c] A power module comprising: a power module substrate including a circuit layer; a power semiconductor element on the circuit layer of the power module substrate; and an encapsulant for encapsulating the power module substrate and the power semiconductor element, wherein the encapsulant comprises a cured product of the two-component liquid resin composition according to any of [1c] to [23c] above. [25c] The power module according to [24c], wherein the power semiconductor element includes one or more types selected from the group consisting of MOS transistors and insulated gate bipolar transistors (IGBTs).

[0013] According to the first to third embodiments of the present invention, it is possible to provide a two-component liquid resin composition having an improved balance of storage stability and fluidity, and a power module using the two-component liquid resin composition.

[0014] The following describes embodiments of the present invention. In this specification, numerical ranges indicated using "to" indicate ranges that include the numerical values ​​before and after "to" as the minimum and maximum values, respectively. In the numerical ranges described in stages in this specification, the upper or lower limit of a certain numerical range can be arbitrarily combined with the upper or lower limit of another numerical range. In the numerical ranges described in this specification, the upper or lower limit of the numerical range may be replaced with a value shown in the examples. "A or B" may include either A or B, or both. Unless otherwise specified, the materials exemplified in this specification can be used alone or in combination of two or more. In this specification, when multiple substances corresponding to each component are present in the composition, the content of each component refers to the total amount of the multiple substances present in the composition, unless otherwise specified. In this specification, the expression "when the entire two-component liquid resin composition (or the first and second components) is taken as 100% by mass" means that components such as solvents that volatilize when the two-component liquid resin composition is cured are excluded.

[0015] <First embodiment> [Two-component liquid resin composition] A two-component liquid resin composition of a first embodiment is a two-component liquid resin composition comprising a first liquid and a second liquid, wherein the first liquid contains an epoxy resin (A), an inorganic filler (C), and an anti-settling agent (D), the second liquid contains an acid anhydride (B), an inorganic filler (C), and an anti-settling agent (D), and the anti-settling agent (D) contains an inorganic thickener (excluding the inorganic filler (C)), and the viscosity η of the first liquid is measured using an E-type viscometer and a 3°×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.

[0016] The two-component liquid resin composition of the first embodiment can improve the balance of storage stability and fluidity by satisfying the above-mentioned constitution. In the two-component liquid resin composition of the first embodiment, it is considered that the specific components in the first and second components of the two-component liquid resin composition contribute to maintaining a preferable dispersion state of the inorganic filler (C) in the first and second components. Furthermore, the viscosity η of the first component ５Ａ is within the above-mentioned range, the fluidity of the first liquid at rest becomes favorable from the viewpoint of storage stability, and sedimentation of the inorganic filler (C) in the first liquid is thought to be physically suppressed. As a result, it is thought that the two-component liquid resin composition of the first embodiment can improve the performance balance of storage stability in the states of the first and second liquids and fluidity suitable for casting workability.

[0017] In the two-component liquid resin composition of the first embodiment, the viscosity η ５Ａ From the viewpoint of further improving the balance of storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the first embodiment is preferably 3.0 Pa s or more, more preferably 5.0 Pa s or more, and even more preferably 8.0 Pa s or more, and is 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. ５Ａ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the first embodiment is preferably 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. ５Ａ indicates the viscosity one minute after the cone rotor set in the E-type viscometer starts to rotate.

[0018] In the two-component liquid resin composition of the first embodiment, the viscosity η of the first component is measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. １０ＡFrom the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the first embodiment is preferably 1.0 Pa·s or more, more preferably 3.0 Pa·s or more, even more preferably 5.0 Pa·s or more, and even more preferably 8.0 Pa·s or more, and is 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. １０Ａ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the first embodiment is preferably 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 still more preferably 8.0 Pa·s or more and 30.0 Pa·s or less. １０Ａ indicates the viscosity one minute after the cone rotor set in the E-type viscometer starts to rotate.

[0019] In the two-component liquid resin composition of the first embodiment, the viscosity η １０Ａ The viscosity η ５Ａ Viscosity ratio Ti Ａ (η ５Ａ / η １０Ａ From the viewpoint of further improving the balance of storage stability and fluidity of the two-component liquid resin composition, the viscosity ratio Ti Ａ (η ５Ａ / η １０Ａ ) is preferably 0.1 or more and 1.5 or less, more preferably 0.3 or more and 1.5 or less, even more preferably 0.5 or more and 1.3 or less, and still more preferably 0.8 or more and 1.1 or less, from the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition.

[0020] In the two-component liquid resin composition of the first embodiment, the viscosity η of the second liquid is measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 25° C. ５Ｂ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the first embodiment is preferably 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, and even more preferably 20.0 Pa·s or more, and is 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. ５Ｂ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the first embodiment is preferably 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, and even more preferably 20.0 Pa·s or more and 30.0 Pa·s or less. ５Ｂ indicates the viscosity one minute after the cone rotor set in the E-type viscometer starts to rotate.

[0021] In the two-component liquid resin composition of the first embodiment, the viscosity η of the second liquid is measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. １０ＢFrom the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the first embodiment is preferably 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, and even more preferably 15.0 Pa·s or more, and is 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. １０Ｂ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the first embodiment is preferably 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, and even more preferably 15.0 Pa·s or more and 25.0 Pa·s or less. １０Ｂ indicates the viscosity one minute after the cone rotor set in the E-type viscometer starts to rotate.

[0022] In the two-component liquid resin composition of the first embodiment, the viscosity η １０Ｂ The above viscosity η ５Ｂ Viscosity ratio Ti Ｂ (η ５Ｂ / η １０Ｂ From the viewpoint of further improving the balance of storage stability and fluidity of the two-component liquid resin composition, the viscosity ratio Ti Ｂ (η ５Ｂ / η １０Ｂ) is preferably 0.5 or more and 2.5 or less, more preferably 0.5 or more and 2.2 or less, even more preferably 0.5 or more and 2.0 or less, even more preferably 0.8 or more and 1.7 or less, and even more preferably 1.0 or more and 1.5 or less, from the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition.

[0023] In the two-component liquid resin composition of the first embodiment, 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 cone rotor at a rotation speed of 5 rpm and a temperature of 25° C. ５Ｐ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the first embodiment is preferably 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, and even more preferably 20.0 Pa·s or more, and is 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. ５Ｐ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the first embodiment is preferably 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, and even more preferably 20.0 Pa·s or more and 35.0 Pa·s or less. ５Ｐ indicates the viscosity one minute after the cone rotor set in the E-type viscometer starts to rotate.

[0024] In the two-component liquid resin composition of the first embodiment, 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 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. １０ＰFrom the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the first embodiment is preferably 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 is 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. １０Ｐ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the first embodiment is preferably 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, and even more preferably 21.0 Pa·s or more and 30.0 Pa·s or less. １０Ｐ indicates the viscosity one minute after the cone rotor set in the E-type viscometer starts to rotate.

[0025] In the two-component liquid resin composition of the first embodiment, the viscosity η １０Ｐ The above viscosity η ５Ｐ Viscosity ratio Ti Ｐ (η ５Ｐ / η １０Ｐ) is preferably 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 is 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, from the viewpoint of further improving the performance balance of storage stability and fluidity of the two-component liquid resin composition. Ｐ (η ５Ｐ / η １０Ｐ ) is preferably 0.5 or more and 2.0 or less, more preferably 0.5 or more and 1.9 or less, even more preferably 0.5 or more and 1.8 or less, even more preferably 0.5 or more and 1.7 or less, even more preferably 0.6 or more and 1.6 or less, even more preferably 0.7 or more and 1.5 or less, even more preferably 0.8 or more and 1.4 or less, even more preferably 0.9 or more and 1.3 or less, and even more preferably 1.0 or more and 1.2 or less, from the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition.

[0026] The components used in the resin composition of the first embodiment will be described in detail below.

[0027] (Epoxy Resin (A)) The two-component liquid resin composition of the first embodiment contains an epoxy resin (A). As the epoxy resin of the first embodiment, from the viewpoint of further improving the performance balance of the strength, hardness, elastic modulus, thermal expansion coefficient, thermal conductivity, heat dissipation property, and electrical properties of the cured product of the two-component liquid resin composition, preferred are alicyclic epoxy resins; bisphenol type epoxy resins such as 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-phenylenediisopridiene)bisphenol type epoxy resin), bisphenol P type epoxy resin (4,4'-(1,4-phenylenediisopridiene)bisphenol type epoxy resin), and bisphenol Z type epoxy resin (4,4'-cyclohexidiene bisphenol type epoxy resin); phenol novolac type epoxy resin, cresol novolac type epoxy resin, trisphenol group methane type novolac type epoxy resin, tetraphenol group ethane type novolac type epoxy resin, and novolac type epoxy resin having a condensed ring aromatic hydrocarbon structure. the two-component liquid resin composition may contain one or more epoxy resins selected from the group consisting of novolac-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; aryl alkylene-type epoxy resins such as xylylene-type epoxy resins and biphenyl aralkyl-type epoxy resins; naphthalene-type epoxy resins such as naphthylene ether-type epoxy resins, naphthol-type epoxy resins, naphthalene diol-type epoxy resins, difunctional to tetrafunctional epoxy-type naphthalene resins, binaphthyl-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, and more preferably contains an alicyclic epoxy resin from the viewpoint of further improving the fluidity of the two-component liquid resin composition.

[0028] The cycloaliphatic epoxy resin of the first embodiment preferably includes an cycloaliphatic epoxy resin that is liquid at 25°C, and more preferably includes an epoxy-[epoxy-oxaspiro C] such as vinylcyclopentadiene dioxide, vinylcyclohexene monodioxide, vinylcyclohexene dioxide, dicyclopentadiene oxide, or 3,4-epoxy-1-[8,9-epoxy-2,4-dioxaspiro[5.5]undecan-3-yl]-cyclohexane. ８－１５ Alkyl]-cycloC ５－１２ Alkanes; epoxy C such as 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexanecarboxylate and 4,5-epoxycyclooctylmethyl-4',5'-epoxycyclooctanecarboxylate ５－１２ Cycloalkyl C １－３ Alkyl-epoxy C ５－１２ Cycloalkane carboxylates; bis(C) such as bis(2-methyl-3,4-epoxycyclohexylmethyl) adipate １－３ Alkyl Epoxy C ５－１２ Cycloalkyl C １－３ and more preferably, the epoxy C ５－１２ Cycloalkyl C １－３ Alkyl-epoxy C ５－１２ The cycloalkane carboxylate is preferably 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylate, and more preferably 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylate. A commercially available product of 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylate is preferably CELLOXIDE #2021P (epoxy equivalent: 128 to 140) manufactured by Daicel Corporation.

[0029] When the epoxy resin (A) of the first embodiment contains an alicyclic epoxy resin, 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, and still more preferably 95 parts by mass or more, relative to 100 parts by mass of the epoxy resin (A), from the viewpoint of further improving the fluidity of the two-component liquid resin composition. The upper limit is not particularly limited, but may be, for example, 100 parts by mass or less. From the viewpoint of further improving the fluidity of the two-component liquid resin composition, the content of the 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, when the content of the epoxy resin (A) is taken as 100 parts by mass.

[0030] The content of the epoxy resin (A) in the two-component liquid resin composition of the first embodiment is, when the total amount of the two-component liquid resin composition is taken as 100% by mass, 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, and even more preferably 10% by mass or more, from the viewpoint of further improving the performance balance of the strength, hardness, elastic modulus, thermal expansion coefficient, thermal conductivity, heat dissipation property, and electrical properties of a cured product of the two-component liquid resin composition; and, from the viewpoint of further improving the performance balance of the storage stability and fluidity of the two-component liquid resin composition, 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, and even more preferably 13% by mass or less. Furthermore, from the viewpoint of further improving the storage stability and flowability of the two-component liquid resin composition and the performance balance of the strength, hardness, elastic modulus, thermal expansion coefficient, thermal conductivity, heat dissipation properties and electrical properties of a cured product of the two-component liquid resin composition, the content of the 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, and even more preferably 10% by mass or more and 13% by mass or less, when the total amount of the two-component liquid resin composition is taken as 100% by mass.

[0031] (Acid Anhydride (B)) 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).

[0032] As the acid anhydride (B) of the first embodiment, from the viewpoint of improving the curability of the two-component liquid resin composition, preferably dodecenyl succinic anhydride, polyadipic anhydride, polyazelaic anhydride, polysebacic anhydride, poly(ethyloctadecanedioic) anhydride, poly(phenylhexadecanedioic) anhydride, methyltetrahydrophthalic anhydride, methylhexahydrophthalic anhydride, hexahydrophthalic anhydride, methylhimic anhydride, tetrahydrophthalic anhydride, trialkyltetrahydrophthalic anhydride, methylcyclohexene dicarboxylic anhydride, phthalic anhydride, trimellitic anhydride, pyromellitic anhydride, benzophenone tetracarboxylic anhydride, ethylene glycol bistrimellitate, HET anhydride, tetrahydrophthalic anhydride, methylnadic anhydride (methyl-5-norbornene and from the viewpoint of further improving the performance balance of the storage stability and fluidity of the two-component liquid resin composition, more preferably the two-component liquid resin composition contains one or more selected from the group consisting of methyl-5-norbornene-2,3-dicarboxylic anhydride, methylcyclohexane-1,2-dicarboxylic anhydride, methyltetrahydrophthalic anhydride (methyl-3,6-endomethylene-1,2,3,6-tetrahydrophthalic anhydride), methylcyclohexane-1,2-dicarboxylic anhydride, 5-(2,5-dioxotetrahydro-3-furanyl)-3-methyl-3-cyclohexane-1,2-dicarboxylic anhydride, and even more preferably the two-component liquid resin composition contains one or more selected from the group consisting of methyl-5-norbornene-2,3-dicarboxylic anhydride, methylcyclohexane-1,2-dicarboxylic anhydride, and methyltetrahydrophthalic anhydride.

[0033] The content of the acid anhydride (B) in the two-component liquid resin composition of the first embodiment is, when the total two-component liquid resin composition is taken as 100% by mass, 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, from the viewpoint of improving the curability of the two-component liquid resin composition, and from the viewpoint of further improving the performance balance of the storage stability and fluidity of the two-component liquid resin composition, 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. Furthermore, the content of the acid anhydride (B) in the two-component liquid resin composition is, when the total two-component liquid resin composition is taken as 100% by mass, 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, from the viewpoint of improving the performance balance of the storage stability, fluidity, and curability of the two-component liquid resin composition.

[0034] (Inorganic Filler (C)) The two-component liquid resin composition of the first embodiment contains an inorganic filler (C). From the viewpoint of further improving the performance balance of the strength, hardness, elastic modulus, thermal expansion coefficient, thermal conductivity, heat dissipation, and electrical properties of a cured product of the two-component liquid resin composition, the inorganic filler (C) preferably contains one or more selected from the group consisting of 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, graphite, aluminum hydroxide, magnesium hydroxide, calcium carbonate, manganese carbonate, magnesium carbonate, barium sulfate, potassium titanate, calcium silicate, inorganic balloons, and silver powder. From the viewpoint of further improving the performance balance of the storage stability and fluidity of the two-component liquid resin composition, the inorganic filler (C) more preferably contains one or more selected from the group consisting of silica, alumina, aluminum hydroxide, and calcium carbonate. The inorganic filler may be subjected to a surface treatment, such as alkylation, trimethylsilylation, silicone treatment, or treatment with a silane coupling agent, but is not particularly limited thereto.

[0035] The shape of the inorganic filler (C) of the first embodiment is preferably fibrous, amorphous, or spherical from the viewpoint of further improving the performance balance of the strength, hardness, elastic modulus, thermal expansion coefficient, thermal conductivity, heat dissipation, and electrical properties of the cured product of the two-component liquid resin composition, and more preferably spherical from the viewpoint of further improving the performance balance of the storage stability and fluidity of the two-component liquid resin composition. Here, spherical may be a true sphere, an ellipse, or a nearly spherical shape including an oval shape. The inorganic filler (C) of the first embodiment has an aspect ratio (ratio of major axis to minor axis) of preferably 1.3 or less, more preferably 1.2 or less, and even more preferably 1.1 or less.

[0036] The average particle diameter D of the inorganic filler (C) of the first embodiment when the cumulative value is 50% in the volume frequency particle size distribution measured by a laser diffraction scattering method ５０From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the average particle diameter D is preferably 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 is 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. ５０ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the average particle diameter D is preferably 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, and even more preferably 20.0 μm or more and 30.0 μm or less. ５０ Within the range of two or more different average particle diameters D ５０ The composition may include an inorganic filler having the formula:

[0037] The average particle diameter D of the inorganic filler (C) of the first embodiment ５０ can be measured by a laser diffraction scattering measurement method using a laser diffraction particle size distribution measuring device (for example, SALD-7000 manufactured by Shimadzu Corporation).

[0038] From the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition, the content of the inorganic filler (C) in the two-component liquid resin composition of the first embodiment is, when the entire two-component liquid resin composition is taken as 100% by mass, 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 is 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. Furthermore, from the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition, the content of the inorganic filler (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, when the entire two-component liquid resin composition is taken as 100% by mass.

[0039] In the first embodiment, the content of the inorganic filler (C) in the first liquid is, when the entire first liquid is taken as 100% by mass, 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, from the viewpoint of further improving the performance balance between the storage stability and fluidity of the first liquid. Furthermore, the content of the inorganic filler (C) in the first liquid is, when the entire first liquid is taken as 100% by mass, 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, from the viewpoint of further improving the performance balance between the storage stability and fluidity of the first liquid.

[0040] In the first embodiment, the content of the inorganic filler (C) in the second liquid is, when the entire second liquid is taken as 100% by mass, 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, from the viewpoint of further improving the performance balance between the storage stability and flowability of the second liquid. Furthermore, the content of the inorganic filler (C) in the second liquid is, when the entire second liquid is taken as 100% by mass, 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, even more preferably 73% by mass or more and 77% by mass or less, from the viewpoint of further improving the performance balance between the storage stability and flowability of the second liquid.

[0041] (Anti-settling agent (D)) The two-component liquid resin composition of the first embodiment contains an inorganic thickener other than the inorganic filler (C) described above as the anti-settling agent (D). By including an inorganic thickener as the anti-settling agent (D), it is possible to suppress the settling of the inorganic filler (C) in the two-component liquid resin composition. From the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition, the inorganic thickener of the first embodiment preferably contains one or more types selected from the group consisting of layered inorganic minerals and nanosilica.

[0042] The layered inorganic mineral of the first embodiment preferably includes one or more types selected from the group consisting of clay and talc, and more preferably includes an organized clay, from the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition.

[0043] The clay of the first embodiment preferably contains one or more types selected from the group consisting of kaolin, smectite, illite, bentonite (montmorillonite), hectorite, pyrophyllite, attapulgite, sepiolite, and laponite, and more preferably contains bentonite from the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition. The organized clay of the first embodiment preferably comprises one or more selected from the group consisting of organized kaolin, organized smectite, organized illite, organized bentonite (organized montmorillonite), organized hectorite, organized pyrophyllite, organized attapulgite, organized sepiolite, and organized laponite. From the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition, the organized clay more preferably comprises organized bentonite, even more preferably comprises bentonite ion-exchanged with a quaternary ammonium salt, even more preferably comprises bentonite ion-exchanged with a quaternary alkylammonium salt, even more preferably comprises bentonite ion-exchanged with a quaternary alkylammonium salt containing at least one alkyl group having from 6 to 24 carbon atoms, and even more preferably comprises bentonite ion-exchanged with a quaternary alkylammonium salt containing at least one alkyl group having from 12 to 22 carbon atoms. Here, the organized clay is a layered silicate (clay) in which an organic compound is intercalated between the layers of the layered silicate planes. Interlayer cations, such as sodium and calcium ions, exist between the layered silicate planes to maintain the layered crystal structure. By ion-exchanging the interlayer cations with organic cations, the organic compounds are chemically bonded to the surface of the silicate planes and inserted between the layers.

[0044] In the organized clay, the organic compound ion-exchanged with the intermediate layer cation preferably contains a quaternary ammonium salt, more preferably a quaternary alkylammonium salt, even more preferably a quaternary alkylammonium salt containing at least one alkyl group having from 6 to 24 carbon atoms, even more preferably a quaternary alkylammonium salt containing at least one alkyl group having from 12 to 22 carbon atoms, and even more preferably one or more selected from the group consisting of trimethylstearylammonium salt, dimethylstearylbenzylammonium salt, dimethyloctadecylammonium salt, oleylbis(2-hydroxyethyl)methylammonium salt, dimethylstearylammonium salt, benzyldimethylstearylammonium salt, and dimethyldistearylammonium salt.

[0045] Commercially available examples of the organized bentonite used in the first embodiment include Benton 34, Benton SD-1, Benton SD-2, Benton SD-3, Benton 57, and Benton 52, all manufactured by ELEMENTIS; 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, all manufactured by Hojun Co., Ltd.; and Kunibis 110, Kunibis 120, and Kunibis 127, all manufactured by Kunimine Kogyo Co., Ltd. Commercially available examples of the organized hectorite used in the first embodiment include Benton 27 and Benton 38, all manufactured by ELEMENTIS.

[0046] The nanosilica contained in the inorganic thickener of the first embodiment is silica having an average particle diameter D of primary particles at a cumulative value of 50% in a volume frequency particle size distribution measured by a laser diffraction scattering method. ５０ The average particle diameter D of the nanosilica of the first embodiment is less than 0.100 μm. ５０From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the average particle diameter D of the nanosilica is preferably 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, and even more preferably 0.020 μm or less, and the lower limit is not particularly limited, but may be, for example, 0.001 μm or more, 0.003 μm or more, 0.005 μm or more, 0.008 μm or more, or 0.010 μm or more. ５０ From the viewpoint of further improving the balance of storage stability and fluidity of the two-component liquid resin composition, the average particle diameter D of the nanosilica of the first embodiment is preferably 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, and even more preferably 0.010 μm or more and 0.020 μm or less. ５０ can be measured by a laser diffraction scattering measurement method using a laser diffraction particle size distribution measuring device (for example, SALD-7000 manufactured by Shimadzu Corporation).

[0047] As the nanosilica of the first embodiment, for example, Reolosil QS09, Reolosil QS10, Reolosil QS102, Reolosil CP102, Reolosil QS20, Reolosil QS20L, Reolosil QS30, Reolosil QS40, etc. manufactured by Tokuyama Corporation can be used.

[0048] The content of the anti-settling agent (D) in the two-component liquid resin composition of the first embodiment, when the entire two-component liquid resin composition is taken as 100% by mass, 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, from the viewpoint of being able to further suppress sedimentation of the inorganic filler (C) in the two-component liquid resin composition; and 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, from the viewpoint of being able to further improve the performance balance between the storage stability and fluidity of the two-component liquid resin composition. Furthermore, the content of the anti-settling agent (D) in the two-component liquid resin composition, when the entire two-component liquid resin composition is taken as 100% by mass, is preferably from 0.01% by mass to 2.00% by mass, more preferably from 0.01% by mass to 1.50% by mass, even more preferably from 0.01% by mass to 1.00% by mass, still more preferably from 0.01% by mass to 0.80% by mass, even more preferably from 0.03% by mass to 0.50% by mass, still more preferably from 0.05% by mass to 0.30% by mass, and still more preferably from 0.08% by mass to 0.20% by mass, from the viewpoint of being able to further suppress sedimentation of the inorganic filler (C) in the two-component liquid resin composition and being able to further improve the performance balance between the storage stability and fluidity of the two-component liquid resin composition.

[0049] The content of the anti-settling agent (D) in the first liquid in the first embodiment is, from the viewpoint of being able to suppress sedimentation of the inorganic filler (C) in the first liquid, 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, when the entire first liquid is taken as 100% by mass, and from the viewpoint of being able to further improve the performance balance between the storage stability and fluidity 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. Furthermore, from the viewpoint of being able to suppress sedimentation of the inorganic filler (C) in the first liquid and from the viewpoint of further improving the performance balance between the storage stability and fluidity of the first liquid, 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, when the entire first liquid is taken as 100% by mass.

[0050] The content of the anti-settling agent (D) in the second liquid in the first embodiment is, from the viewpoint of being able to suppress sedimentation of the inorganic filler (C) in the second liquid, 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, when the entire second liquid is taken as 100% by mass, and from the viewpoint of being able to further improve the performance balance between the storage stability and fluidity 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. Furthermore, from the viewpoint of being able to suppress sedimentation of the inorganic filler (C) in the second liquid and from the viewpoint of further improving the performance balance between the storage stability and fluidity of the second liquid, the content of the anti-settling agent (D) in the second liquid, when the entire second liquid is taken as 100% by mass, 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, and even more preferably 0.08% by mass or more and 0.15% by mass or less.

[0051] (Curing Accelerator (E)) The two-component liquid resin composition of the first embodiment preferably further contains a curing accelerator (E) from the viewpoint of accelerating the reaction between the epoxy resin (A) and the acid anhydride (B) and improving the curability of the two-component liquid resin composition. The curing accelerator (E) of the first embodiment is preferably contained in the second component from the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition.

[0052] From the viewpoint of being able to improve the curability of the two-component liquid resin composition, the curing accelerator (E) of the first embodiment preferably contains one or more selected from the group consisting of tertiary amines, quaternary ammonium salts, imidazoles, organic phosphines, and Lewis acid catalysts, and more preferably contains a quaternary ammonium salt.

[0053] The tertiary amine preferably includes one or more selected from the group consisting of trimethylamine, triethylamine, tripropylamine, tributylamine and benzyldimethylamine.

[0054] The quaternary ammonium salt preferably includes one or more selected from the group consisting of organic acid salts of diazabicycloundecene, such as octylate salt of DBU [1,8-diazabicyclo[5.4.0]undecene-7] (manufactured by San-Apro Ltd., trade name: SA102), DBN [1,5-diazabicyclo[4.3.0]-5-nonene], quaternary ammonium salts which are salts of tertiary amines and carboxylic acids (manufactured by San-Apro Ltd., trade name: U-CAT2313), octadecyltrimethylammonium chloride (manufactured by NOF Corporation, trade name: Nissan Cation), and tetraalkyl ammonium salts (each alkyl group having 1 to 18 carbon atoms) (e.g., tetraethylammonium bromide, tetrabutylammonium bromide, tetraalkylammonium carboxylates (carboxylic acid having 1 to 12 carbon atoms)). The curing accelerator (E) of the first embodiment more preferably contains an organic acid salt of diazabicycloundecene, from the viewpoint of being able to improve the curability of the two-component liquid resin composition.

[0055] The imidazoles preferably include one or more selected from the group consisting of 1-benzyl-2-methylimidazole, 2-ethyl-4-methylimidazole, 2-undecylimidazole, 1,2-dimethylimidazole and 1-benzyl-2-phenylimidazole.

[0056] The organic phosphine preferably includes one or more selected from the group consisting of triphenylphosphine, triphenylphosphine-triphenylborate, tris(p-methoxyphenyl)phosphine, and tetraphenylphosphonium tetraphenylborate.

[0057] The Lewis acid catalyst preferably includes one or more selected from the group consisting of boron trifluoride amine complex, boron trichloride amine complex, and boron trifluoride ethylamine complex.

[0058] The content of the curing accelerator (E) in the two-component liquid resin composition of the first embodiment is, when the entire two-component liquid resin composition is taken as 100% by mass, 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, and even more preferably 0.20% by mass or more, from the viewpoint of being able to improve the curability of the two-component liquid resin composition; and from the viewpoint of being able to further improve the performance balance between the storage stability and fluidity of the two-component liquid resin composition, 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. From the viewpoint of improving the curability, storage stability, and flowability of the two-component liquid resin composition, 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, when the total amount of the two-component liquid resin composition is taken as 100% by mass.

[0059] (Other Components) The two-component liquid resin composition of the first embodiment may contain, as necessary, a coupling agent, a colorant such as carbon black, an antifoaming agent such as a silicone antifoaming agent, a flame retardant, and the like.

[0060] From the viewpoint of being able to improve the interfacial strength between the epoxy resin (A) and the inorganic filler (C), the coupling agent of the first embodiment preferably contains one or more selected from the group consisting of an epoxy silane coupling agent, an amino silane coupling agent, a ureido silane coupling agent, and a mercapto silane coupling agent, and more preferably contains an epoxy silane coupling agent.

[0061] The epoxy silane coupling agent preferably includes one or more selected from the group consisting of γ-glycidoxypropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldimethoxysilane, and β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, and more preferably includes γ-glycidoxypropyltrimethoxysilane. The aminosilane coupling agent preferably includes one or more selected from the group consisting of 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-(trimethoxysilylpropyl)-1,3-benzenedimethanane. The ureidosilane coupling agent preferably includes one or more selected from the group consisting of γ-ureidopropyltriethoxysilane and hexamethyldisilazane.

[0062] From the viewpoint of improving the interfacial strength between the epoxy resin (A) and the inorganic filler (C), the content of the coupling agent in the two-component liquid resin composition of the first embodiment is, when the entire two-component liquid resin composition is taken as 100 mass%, preferably 0.01 mass% or more, more preferably 0.03 mass% or more, even more preferably 0.05 mass% or more, still more preferably 0.08 mass% or more, and is preferably 1.00 mass% or less, more preferably 0.80 mass% or less, even more preferably 0.60 mass% or less, even more preferably 0.40 mass% or less, and still more preferably 0.20 mass% or less. From the viewpoint of improving the interfacial strength between the epoxy resin (A) and the inorganic filler (C), the content of the 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, when the entire two-component liquid resin composition is taken as 100% by mass.

[0063] The colorant of the first embodiment preferably contains one or more selected from the group consisting of carbon black, titanium oxide, barium sulfate, iron black, red iron oxide, aniline black, and alizanin, and more preferably contains carbon black.

[0064] The content of the colorant in the two-component liquid resin composition of the first embodiment is, when the entire two-component liquid resin composition is taken as 100% by mass, 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 is 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, even more preferably 0.10% by mass or less. Furthermore, the content of the colorant in the two-component liquid resin composition, when the entire two-component liquid resin composition is taken as 100% by mass, 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.

[0065] The defoaming agent of the first embodiment preferably includes one or more selected from the group consisting of a silicone-based defoaming agent, a fluorine-based defoaming agent, and a polymer-based defoaming agent, and more preferably includes a silicone-based defoaming agent.

[0066] The content of the defoaming agent in the two-component liquid resin composition of the first embodiment is, when the total amount of the two-component liquid resin composition is taken as 100% by mass, 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. Furthermore, the content of the defoaming agent in the two-component liquid resin composition is, when the total amount of the two-component liquid resin composition is taken as 100% by mass, 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.

[0067] From the viewpoint of further improving 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 the group consisting of aluminum hydroxide, magnesium hydroxide, zinc borate, zinc molybdate, antimony trioxide, antimony pentoxide, phosphazene, brominated epoxy resin, and brominated polycarbonate.

[0068] 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, and more preferably 5.0% by mass or more and 30% by mass or less, when the entire two-component liquid resin composition is taken as 100% by mass, from the viewpoint of further improving the flame retardancy of the cured product of the two-component liquid resin composition.

[0069] (Method for producing two-component liquid resin composition) A method for producing the two-component liquid resin composition of the first embodiment will be described in detail. The two-component liquid resin composition of the first embodiment can be produced by thoroughly mixing and stirring, by a known method, the epoxy resin (A), inorganic filler (C), anti-settling agent (D), and other components as the first component, and the acid anhydride (B), inorganic filler (C), anti-settling agent (D), and other components as the second component, among the above-mentioned components. When the two-component liquid resin composition of the first embodiment contains the curing accelerator (E), the second component preferably contains the curing accelerator (E).

[0070] Examples of a method for mixing and stirring the components to obtain the first or second liquid in the two-component liquid resin composition of the first embodiment include a method using a mixer or other mixing machine, or a kneader such as a roll or kneader.

[0071] The two-component liquid resin composition of the first embodiment is used in the form of a mixed liquid obtained by mixing the first and second liquids. Examples of a method for mixing the first and second liquids include a method using a mixer or other mixer, or a kneader or other kneading machine.

[0072] In the two-component liquid resin composition of the first embodiment, the content of the second liquid when the first liquid and the second liquid are further mixed is preferably 50 parts by mass or more, more preferably 70 parts by mass or more, even 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 even more preferably 110 parts by mass or less, per 100 parts by mass of the first liquid, from the viewpoint of further improving the performance balance of the two-component liquid resin composition among the fluidity, heat resistance upon curing, and mechanical properties. Furthermore, the content of the second liquid when the first liquid and the second liquid are further mixed 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 less, per 100 parts by mass of the first liquid, from the viewpoint of further improving the performance balance of the fluidity, heat resistance upon curing, and mechanical properties of the two-component liquid resin composition.

[0073] Second Embodiment [Two-component liquid resin composition] A two-component liquid resin composition of a second embodiment is a two-component liquid resin composition comprising a first liquid and a second liquid, wherein the first liquid contains an epoxy resin (A), an inorganic filler (C), and an anti-settling agent (D), and the second liquid contains an acid anhydride (B), an inorganic filler (C), and an anti-settling agent (D), and the anti-settling agent (D) contains a dispersant, and the viscosity η of the first liquid is measured using an E-type viscometer and a 3°×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.

[0074] The two-component liquid resin composition of the second embodiment can improve the balance of storage stability and fluidity by satisfying the above-mentioned constitution. In the two-component liquid resin composition of the second embodiment, it is considered that the specific components in the first and second components of the two-component liquid resin composition contribute to maintaining a preferable dispersion state of the inorganic filler (C) in the first and second components. Furthermore, the viscosity η of the first component ５Ａis within the above-mentioned range, the fluidity of the first liquid at rest becomes favorable from the viewpoint of storage stability, and sedimentation of the inorganic filler (C) in the first liquid is thought to be physically suppressed. As a result, it is thought that the two-component liquid resin composition of the second embodiment can improve the performance balance of storage stability in the states of the first and second liquids and fluidity suitable for casting workability.

[0075] In the two-component liquid resin composition of the second embodiment, the viscosity η ５Ａ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the second embodiment is preferably 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 is preferably 40.0 Pa·s or less, more preferably 30.0 Pa·s or less, even more preferably 25.0 Pa·s or less. ５Ａ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the second embodiment is preferably 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, and even more preferably 20.0 Pa·s or more and 25.0 Pa·s or less. ５Ａ indicates the viscosity one minute after the cone rotor set in the E-type viscometer starts to rotate.

[0076] In the two-component liquid resin composition of the second embodiment, the viscosity η of the first component is measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. １０ＡFrom the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the second embodiment is preferably 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 is preferably 50.0 Pa·s or less, more preferably 40.0 Pa·s or less, even more preferably 30.0 Pa·s or less. １０Ａ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the second embodiment is preferably 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, and even more preferably 20.0 Pa·s or more and 30.0 Pa·s or less. １０Ａ indicates the viscosity one minute after the cone rotor set in the E-type viscometer starts to rotate.

[0077] In the two-component liquid resin composition of the second embodiment, the viscosity η １０Ａ The viscosity η ５Ａ Viscosity ratio Ti Ａ (η ５Ａ / η １０Ａ From the viewpoint of further improving the balance of storage stability and fluidity of the two-component liquid resin composition, the viscosity ratio Ti Ａ (η ５Ａ / η １０Ａ) 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, from the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition.

[0078] In the two-component liquid resin composition of the second embodiment, the viscosity η of the second liquid is measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 25° C. ５Ｂ From the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the second embodiment is preferably 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, and even more preferably 20.0 Pa·s or more, and is 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, and even more preferably 35.0 Pa·s or less. ５Ｂ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the second embodiment is preferably 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, and even more preferably 20.0 Pa·s or more and 35.0 Pa·s or less. ５Ｂ indicates the viscosity one minute after the cone rotor set in the E-type viscometer starts to rotate.

[0079] In the two-component liquid resin composition of the second embodiment, the viscosity η of the second component is measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. １０Ｂ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the second embodiment is preferably 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, and even more preferably 15.0 Pa·s or more, and is 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. １０Ｂ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the second embodiment is preferably 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, and even more preferably 15.0 Pa·s or more and 30.0 Pa·s or less. １０Ｂ indicates the viscosity one minute after the cone rotor set in the E-type viscometer starts to rotate.

[0080] In the two-component liquid resin composition of the second embodiment, the viscosity η １０Ｂ The viscosity η ５Ｂ Viscosity ratio Ti Ｂ (η ５Ｂ / η １０Ｂ From the viewpoint of further improving the balance of storage stability and fluidity of the two-component liquid resin composition, the viscosity ratio Ti Ｂ (η ５Ｂ / η １０Ｂ ) is preferably 0.5 or more and 4.0 or less, more preferably 0.5 or more and 3.5 or less, even more preferably 0.5 or more and 3.0 or less, even more preferably 0.5 or more and 2.5 or less, even more preferably 0.8 or more and 2.0 or less, and even more preferably 1.0 or more and 1.5 or less, from the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition.

[0081] In the two-component liquid resin composition of the second embodiment, 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 cone rotor at a rotation speed of 5 rpm and a temperature of 25° C. ５Ｐ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the second embodiment is preferably 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, and even more preferably 20.0 Pa·s or more, and is 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. ５Ｐ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the second embodiment is preferably 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, and even more preferably 20.0 Pa·s or more and 28.0 Pa·s or less. ５Ｐ indicates the viscosity one minute after the cone rotor set in the E-type viscometer starts to rotate.

[0082] In the two-component liquid resin composition of the second embodiment, 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 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. １０Ｐ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the second embodiment is preferably 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 is 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. １０Ｐ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the second embodiment is preferably 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, and even more preferably 21.0 Pa·s or more and 27.0 Pa·s or less. １０Ｐ indicates the viscosity one minute after the cone rotor set in the E-type viscometer starts to rotate.

[0083] In the two-component liquid resin composition of the second embodiment, the viscosity η １０Ｐ The viscosity η ５Ｐ Viscosity ratio Ti Ｐ (η ５Ｐ / η １０ＰFrom the viewpoint of further improving the balance of storage stability and fluidity of the two-component liquid resin composition, the viscosity ratio Ti Ｐ (η ５Ｐ / η １０Ｐ ) is preferably 0.5 or more and 2.0 or less, more preferably 0.5 or more and 1.9 or less, even more preferably 0.5 or more and 1.8 or less, even more preferably 0.5 or more and 1.7 or less, even more preferably 0.6 or more and 1.6 or less, even more preferably 0.7 or more and 1.5 or less, even more preferably 0.8 or more and 1.4 or less, even more preferably 0.9 or more and 1.3 or less, and even more preferably 1.0 or more and 1.2 or less, from the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition.

[0084] The components used in the resin composition of the second embodiment will be described in detail below.

[0085] (Epoxy Resin (A)) The two-component liquid resin composition of the second embodiment contains an epoxy resin (A). As the epoxy resin of the second embodiment, from the viewpoint of further improving the performance balance of the strength, hardness, elastic modulus, thermal expansion coefficient, thermal conductivity, heat dissipation, and electrical properties of the cured product of the two-component liquid resin composition, preferred are alicyclic epoxy resins; bisphenol type epoxy resins such as 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-phenylenediisopridiene)bisphenol type epoxy resin), bisphenol P type epoxy resin (4,4'-(1,4-phenylenediisopridiene)bisphenol type epoxy resin), and bisphenol Z type epoxy resin (4,4'-cyclohexidiene bisphenol type epoxy resin); phenol novolac type epoxy resin, cresol novolac type epoxy resin, trisphenol group methane type novolac type epoxy resin, tetraphenol group ethane type novolac type epoxy resin, and novolac type epoxy resin having a condensed ring aromatic hydrocarbon structure. the two-component liquid resin composition may contain one or more epoxy resins selected from the group consisting of novolac-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; aryl alkylene-type epoxy resins such as xylylene-type epoxy resins and biphenyl aralkyl-type epoxy resins; naphthalene-type epoxy resins such as naphthylene ether-type epoxy resins, naphthol-type epoxy resins, naphthalene diol-type epoxy resins, difunctional to tetrafunctional epoxy-type naphthalene resins, binaphthyl-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, and more preferably contains an alicyclic epoxy resin from the viewpoint of further improving the fluidity of the two-component liquid resin composition.

[0086] The cycloaliphatic epoxy resin of the second embodiment preferably includes an cycloaliphatic epoxy resin that is liquid at 25°C, and more preferably includes an epoxy-[epoxy-oxaspiro C] such as vinylcyclopentadiene dioxide, vinylcyclohexene monodioxide, vinylcyclohexene dioxide, dicyclopentadiene oxide, or 3,4-epoxy-1-[8,9-epoxy-2,4-dioxaspiro[5.5]undecan-3-yl]-cyclohexane. ８－１５ Alkyl]-cycloC ５－１２ Alkanes; epoxy C such as 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexanecarboxylate and 4,5-epoxycyclooctylmethyl-4',5'-epoxycyclooctanecarboxylate ５－１２ Cycloalkyl C １－３ Alkyl-epoxy C ５－１２ Cycloalkane carboxylates; bis(C) such as bis(2-methyl-3,4-epoxycyclohexylmethyl) adipate １－３ Alkyl Epoxy C ５－１２ Cycloalkyl C １－３ and more preferably, the epoxy C ５－１２ Cycloalkyl C １－３ Alkyl-epoxy C ５－１２ The cycloalkane carboxylate is preferably 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylate, and more preferably 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylate. A commercially available product of 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylate is preferably CELLOXIDE #2021P (epoxy equivalent: 128 to 140) manufactured by Daicel Corporation.

[0087] When the epoxy resin (A) of the second embodiment contains an alicyclic epoxy resin, 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, and still more preferably 95 parts by mass or more, relative to 100 parts by mass of the epoxy resin (A), from the viewpoint of further improving the fluidity of the two-component liquid resin composition. The upper limit is not particularly limited, but may be, for example, 100 parts by mass or less. From the viewpoint of further improving the fluidity of the two-component liquid resin composition, the content of the 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, when the content of the epoxy resin (A) is taken as 100 parts by mass.

[0088] The content of the epoxy resin (A) in the two-component liquid resin composition of the second embodiment is, when the total amount of the two-component liquid resin composition is taken as 100% by mass, 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, and even more preferably 10% by mass or more, from the viewpoint of further improving the performance balance of the strength, hardness, elastic modulus, thermal expansion coefficient, thermal conductivity, heat dissipation property, and electrical properties of a cured product of the two-component liquid resin composition; and, from the viewpoint of further improving the performance balance of the storage stability and fluidity of the two-component liquid resin composition, 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, and even more preferably 11% by mass or less. Furthermore, from the viewpoint of further improving the storage stability and flowability of the two-component liquid resin composition and the performance balance of the strength, hardness, elastic modulus, thermal expansion coefficient, thermal conductivity, heat dissipation property and electrical properties of a cured product of the two-component liquid resin composition, the content of the epoxy resin (A) in the two-component liquid resin composition is preferably from 5 to 30% by mass, more preferably from 5 to 28% by mass, even more preferably from 5 to 25% by mass, even more preferably from 5 to 23% by mass, even more preferably from 6 to 20% by mass, even more preferably from 7 to 18% by mass, even more preferably from 8 to 15% by mass, even more preferably from 9 to 13% by mass, and even more preferably from 10 to 11% by mass, when the total amount of the two-component liquid resin composition is taken as 100% by mass.

[0089] (Acid Anhydride (B)) 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).

[0090] As the acid anhydride (B) of the second embodiment, from the viewpoint of improving the curability of the two-component liquid resin composition, preferably dodecenyl succinic anhydride, polyadipic anhydride, polyazelaic anhydride, polysebacic anhydride, poly(ethyloctadecanedioic) anhydride, poly(phenylhexadecanedioic) anhydride, methyltetrahydrophthalic anhydride, methylhexahydrophthalic anhydride, hexahydrophthalic anhydride, methylhimic anhydride, tetrahydrophthalic anhydride, trialkyltetrahydrophthalic anhydride, methylcyclohexene dicarboxylic anhydride, phthalic anhydride, trimellitic anhydride, pyromellitic anhydride, benzophenone tetracarboxylic anhydride, ethylene glycol bistrimellitate, HET anhydride, tetrahydrophthalic anhydride, methylnadic anhydride (methyl-5-norbornene and from the viewpoint of further improving the performance balance of the storage stability and fluidity of the two-component liquid resin composition, more preferably the two-component liquid resin composition contains one or more selected from the group consisting of methyl-5-norbornene-2,3-dicarboxylic anhydride, methylcyclohexane-1,2-dicarboxylic anhydride, methyltetrahydrophthalic anhydride (methyl-3,6-endomethylene-1,2,3,6-tetrahydrophthalic anhydride), methylcyclohexane-1,2-dicarboxylic anhydride, 5-(2,5-dioxotetrahydro-3-furanyl)-3-methyl-3-cyclohexane-1,2-dicarboxylic anhydride, and even more preferably the two-component liquid resin composition contains one or more selected from the group consisting of methyl-5-norbornene-2,3-dicarboxylic anhydride, methylcyclohexane-1,2-dicarboxylic anhydride, and methyltetrahydrophthalic anhydride.

[0091] The content of the acid anhydride (B) in the two-component liquid resin composition of the second embodiment, when the entire two-component liquid resin composition is taken as 100% by mass, 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, from the viewpoint of improving the curability of the two-component liquid resin composition, and 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, from the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition. Furthermore, the content of the acid anhydride (B) in the two-component liquid resin composition, when the entire two-component liquid resin composition is taken as 100% by mass, 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, from the viewpoint of improving the performance balance of storage stability, fluidity, and curability of the two-component liquid resin composition.

[0092] (Inorganic Filler (C)) The two-component liquid resin composition of the second embodiment contains an inorganic filler (C). From the viewpoint of further improving the performance balance of the strength, hardness, elastic modulus, thermal expansion coefficient, thermal conductivity, heat dissipation, and electrical properties of a cured product of the two-component liquid resin composition, the inorganic filler (C) preferably contains one or more selected from the group consisting of 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, graphite, aluminum hydroxide, magnesium hydroxide, calcium carbonate, manganese carbonate, magnesium carbonate, barium sulfate, potassium titanate, calcium silicate, inorganic balloons, and silver powder. From the viewpoint of further improving the performance balance of the storage stability and fluidity of the two-component liquid resin composition, the inorganic filler (C) more preferably contains one or more selected from the group consisting of silica, alumina, aluminum hydroxide, and calcium carbonate. The inorganic filler may be subjected to a surface treatment, such as alkylation, trimethylsilylation, silicone treatment, or treatment with a silane coupling agent, but is not particularly limited thereto.

[0093] The shape of the inorganic filler (C) of the second embodiment is preferably fibrous, amorphous, or spherical from the viewpoint of further improving the performance balance of the strength, hardness, elastic modulus, thermal expansion coefficient, thermal conductivity, heat dissipation, and electrical properties of the cured product of the two-component liquid resin composition, and more preferably spherical from the viewpoint of further improving the performance balance of the storage stability and fluidity of the two-component liquid resin composition. Here, spherical may be a true sphere, an ellipse, or a nearly spherical shape including an oval shape. The inorganic filler (C) of the second embodiment has an aspect ratio (ratio of major axis to minor axis) of preferably 1.3 or less, more preferably 1.2 or less, and even more preferably 1.1 or less.

[0094] The average particle diameter D of the inorganic filler (C) of the second embodiment when the cumulative value is 50% in the volume frequency particle size distribution measured by a laser diffraction scattering method ５０From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the average particle diameter D is preferably 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 is 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. ５０ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the average particle diameter D is preferably 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, and even more preferably 20.0 μm or more and 30.0 μm or less. ５０ Within the range of two or more different average particle diameters D ５０ The composition may include an inorganic filler having the formula:

[0095] The average particle diameter D of the inorganic filler (C) of the second embodiment ５０ can be measured by a laser diffraction scattering measurement method using a laser diffraction particle size distribution measuring device (for example, SALD-7000 manufactured by Shimadzu Corporation).

[0096] From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the content of the inorganic filler (C) in the two-component liquid resin composition of the second embodiment is, when the entire two-component liquid resin composition is taken as 100% by mass, 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 is 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. Furthermore, from the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition, the content of the inorganic filler (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, when the entire two-component liquid resin composition is taken as 100% by mass.

[0097] From the viewpoint of further improving the performance balance between the storage stability and fluidity of the first liquid, the content of the inorganic filler (C) in the first liquid in the second embodiment is, when the entire first liquid is taken as 100% by mass, 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 is 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. Furthermore, from the viewpoint of further improving the performance balance between the storage stability and fluidity of the first liquid, the content of the inorganic filler (C) in the first liquid, when the entire first liquid is taken as 100% by mass, 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, and even more preferably 77% by mass or more and 79% by mass or less.

[0098] In the second embodiment, the content of the inorganic filler (C) in the second liquid is, when the entire second liquid is taken as 100% by mass, 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, from the viewpoint of further improving the performance balance between the storage stability and flowability of the second liquid. Furthermore, the content of the inorganic filler (C) in the second liquid is, when the entire second liquid is taken as 100% by mass, 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, even more preferably 73% by mass or more and 77% by mass or less, from the viewpoint of further improving the performance balance between the storage stability and flowability of the second liquid.

[0099] (Anti-settling Agent (D)) The two-component liquid resin composition of the second embodiment contains a dispersant as the anti-settling agent (D). By including a dispersant as the anti-settling agent (D), sedimentation of the inorganic filler (C) in the two-component liquid resin composition can be suppressed. The dispersant of the second embodiment preferably contains an ester compound containing a long-chain hydrocarbon group, more preferably one or more selected from the group consisting of carboxylic acid ester compounds containing a long-chain hydrocarbon group, phosphate ester compounds containing a long-chain hydrocarbon group, sulfate ester compounds containing a long-chain hydrocarbon group, nitrate ester compounds containing a long-chain hydrocarbon group, and carbonate ester compounds containing a long-chain hydrocarbon group, and even more preferably one or more selected from the group consisting of carboxylic acid ester compounds containing a long-chain hydrocarbon group and phosphate ester compounds containing a long-chain hydrocarbon group. Such ester compounds containing a long-chain hydrocarbon group can suppress secondary aggregation of the inorganic filler (C) due to steric hindrance caused by the long-chain hydrocarbon group, and are therefore thought to further improve the balance of storage stability and fluidity of the two-component liquid resin composition.

[0100] In order to further improve the balance of storage stability and fluidity of the two-component liquid resin composition, the long-chain hydrocarbon group in the ester compound containing a long-chain hydrocarbon group of the second embodiment preferably comprises one or more groups selected from the group consisting of alkylene groups, alkyl groups, alkenyl groups, aralkyl groups, aryl groups, and aryl groups in which one, two, or three hydrogen atoms of the hydrocarbon are substituted with a substituent, and more preferably comprises one or more groups selected from the group consisting of alkylene groups, alkyl groups, and alkenyl groups. The long-chain hydrocarbon group may be linear or branched. Some of the hydrogen atoms in the long-chain hydrocarbon group may be substituted with a substituent such as a hydroxy group, aldehyde group, carbonyl group, carboxy group, amino group, nitro group, sulfo group, or halogeno group. The long-chain hydrocarbon group may also include an oxygen-containing linking group such as an ether bond or an ester bond in the long chain.

[0101] From the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition, the ester group in the ester compound containing a long-chain hydrocarbon group of the second embodiment preferably contains one or more types selected from the group consisting of a carboxylic acid ester group, a phosphate ester group, a sulfate ester group, a nitrate ester group, and a carbonate ester group, and more preferably contains one or more types selected from the group consisting of a carboxylic acid ester group and a phosphate ester group.

[0102] From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the number of carbon atoms in the long-chain hydrocarbon group in the ester compound containing a long-chain hydrocarbon group of the second embodiment is preferably 4 or more, more preferably 6 or more, even more preferably 8 or more, and even more preferably 10 or more, and is 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. Furthermore, from the viewpoint of further improving the performance balance between storage stability and fluidity 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.

[0103] From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the mass average molecular weight of the ester compound containing a long-chain hydrocarbon group according to 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, and even more preferably 800 or more, and is 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. From the viewpoint of further improving the performance balance between storage stability and fluidity 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.

[0104] The ester compound containing a long-chain hydrocarbon group of the second embodiment preferably contains one or more compounds selected from the group consisting of polyhydroxycarboxylic acid esters, acidic phosphate esters, and modified carboxyl group-containing polymers, from the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition.

[0105] The polyhydroxycarboxylic acid ester of the second embodiment preferably contains a compound represented by the following general formula (Ib), from the viewpoint of further improving the balance of storage stability and fluidity of the two-component liquid resin composition.

[0106]

[0107] In the general formula (Ib), v and y each independently represent 1 or 2, w represents an integer of 0 to 10, and x represents an integer of 14 to 40. ｗ - (CH ２ ) ｘ - is w consecutive (CH=CH)s linked together, followed by (CH ２ ) may be linked in a block structure of x consecutive units, or (CH=CH) and (CH ２) may be arranged randomly.

[0108] In the general formula (Ib), from the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, w is preferably an integer of 0 or more and 8 or less. In addition, from the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, x is preferably an integer of 18 or more and 36 or less.

[0109] An example of a commercially available polyhydroxycarboxylic acid ester of the second embodiment is BYK-R606 manufactured by BYK Japan.

[0110] The acidic phosphate ester of the second embodiment preferably contains a compound represented by the following general formula (IIb), from the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition.

[0111]

[0112] In the above general formula (IIb), R １ is a saturated or unsaturated hydrocarbyl group having from 4 to 20 carbon atoms, R ２ is a saturated hydrocarbylene group having 1 to 20 carbon atoms, and R ３ is a saturated hydrocarbylene group having 2 or 3 carbon atoms, and R ４ is a saturated or unsaturated hydrocarbylene group having 1 to 8 carbon atoms, k, l, and m are each an integer of 0 to 20, and n is 1 or 2. １ If there are multiple R １ may be the same or different, R ２ If there are multiple R ２ may be the same or different, R ３ If there are multiple R ３ may be the same or different, R ４ If there are multiple R ４ may be the same or different. ２ O- group, 1 -R ３ O- group and m -COR ４The order of the COO- groups is arbitrary. When n=2, two R １ O (COR ２ O) ｋ (R ３ O) ｌ (COR ４ COO) ｍ The groups may be the same or different.

[0113] In the above general formula (IIb), R １ is not particularly limited as long as it is a saturated or unsaturated hydrocarbyl group having from 4 to 20 carbon atoms. １ preferably contains one or more groups selected from the group consisting of saturated hydrocarbon groups and unsaturated hydrocarbon groups. The saturated hydrocarbon group preferably contains one or more groups selected from the group consisting of octyl, 2-ethylhexyl, nonyl, decyl, undecyl, dodecyl, tetradecyl, hexadecyl, and octadecyl groups. The unsaturated hydrocarbon group preferably contains one or more groups selected from the group consisting of phenyl and nonylphenyl groups. R １ The number of carbon atoms in R is preferably 6 or more and 18 or less, from the viewpoint of further improving the balance of storage stability and fluidity of the two-component liquid resin composition. １ The number of carbon atoms is preferably 10 or more and 18 or less.

[0114] In the above general formula (IIb), R ２ is a saturated hydrocarbylene group having 1 to 20 carbon atoms. ２ The number of carbon atoms in R is preferably 1 or more and 16 or less. ２ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, preferably contains one or more selected from the group consisting of a methylene group, an ethylene group, a pentylene group, a tetradecylene group and a pentadecylene group.

[0115] In the above general formula (IIb), R ３ is a saturated hydrocarbylene group having 2 or 3 carbon atoms. ３is preferably a saturated hydrocarbylene group having 2 carbon atoms, more preferably an ethylene group, from the viewpoint of further improving the balance of storage stability and flowability of the two-component liquid resin composition.

[0116] In the above general formula (IIb), R ４ is a saturated or unsaturated hydrocarbylene group having 1 to 8 carbon atoms. ４ The number of carbon atoms in R is preferably 1 or more and 6 or less. ４ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, preferably contains one or more selected from the group consisting of a methylene group, an ethylene group, a propylene group, a butylene group, a pentylene group and a phenyl group.

[0117] In the general formula (IIb), k, l and m are preferably integers of 0 to 10, from the viewpoint of further improving the balance of storage stability and flowability of the two-component liquid resin composition.

[0118] In the general formula (IIb), the monomer unit represented by k, l, and m, i.e., k -COR ２ O- group, 1 -R ３ O- group and m -COR ４ The COO- group is R １ The order of arrangement between the O-group and the phosphorus atom is arbitrary. These groups do not necessarily have to be arranged as in general formula (IIb). ２ O) ｋ (R ３ O) ｌ (COR ４ COO) ｍ The - group may be a block copolymer or a random copolymer.

[0119] An example of a commercially available acidic phosphate ester according to the second embodiment is BYK-W9010 manufactured by BYK Japan.

[0120] The carboxyl group-containing modified polymer of the second embodiment includes an ester compound of an α-olefin-maleic anhydride copolymer and a monohydric alcohol. Such an ester compound has a controlled arrangement of a hydrophobic moiety, such as a hydrocarbon group derived from the α-olefin, and a hydrophilic moiety, such as a carboxyl group, formed by ring-opening addition of a maleic anhydride group derived from the maleic anhydride.

[0121] From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the α-olefins constituting the ester compound of the α-olefin-maleic anhydride copolymer and monohydric alcohols of the second embodiment preferably contain linear or branched unsaturated hydrocarbons having 6 or more carbon atoms, and preferably contain unsaturated hydrocarbons having 6 to 30 carbon atoms. The unsaturated hydrocarbons having 6 to 30 carbon atoms preferably contain one or more species selected from the group consisting of 1-dodecene and 1-tetradecene.

[0122] The monohydric alcohols constituting the ester compound of the α-olefin-maleic anhydride copolymer and the monohydric alcohol of the second embodiment preferably include one or more selected from the group consisting of aliphatic alcohols, aromatic alcohols, and polyalkylene glycol monoalkyl ethers, from the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition.

[0123] The fatty alcohol in the second embodiment preferably includes one or more selected from the group consisting of cetyl alcohol and stearyl alcohol.

[0124] The aromatic alcohol of the second embodiment preferably includes one or more selected from the group consisting of 1-phenyl-1-propanol and α-phenoxy-2-propanol.

[0125] The polyalkylene glycol monoalkyl ether of the second embodiment preferably comprises a polyethylene glycol monoalkyl ether having a molecular weight of 400 to 700.

[0126] The acid value of the carboxyl group-containing modified polymer of the second embodiment is preferably 10 mgKOH / g or more and 100 mgKOH / g or less, more preferably 15 mgKOH / g or more and 60 mgKOH / g or less.

[0127] Examples of commercially available products of the carboxyl group-containing modified polymer of the second embodiment include FLOWLEN G-700, FLOWLEN G-900, FLOWLEN G-1500, and NC-500 manufactured by Kyoeisha Chemical Co., Ltd.

[0128] The content of the anti-settling agent (D) in the two-component liquid resin composition of the second embodiment, when the entire two-component liquid resin composition is taken as 100% by mass, 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, and even more preferably 0.15% by mass or more, from the viewpoint of further suppressing the sedimentation of the inorganic filler (C) in the two-component liquid resin composition; and 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, and even more preferably 0.20% by mass or less, from the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition. Furthermore, the content of the anti-settling agent (D) in the two-component liquid resin composition, when the entire two-component liquid resin composition is taken as 100% by mass, is preferably from 0.01% by mass to 2.00% by mass, more preferably from 0.01% by mass to 1.50% by mass, even more preferably from 0.03% by mass to 1.00% by mass, still more preferably from 0.05% by mass to 0.80% by mass, even more preferably from 0.08% by mass to 0.50% by mass, still more preferably from 0.10% by mass to 0.30% by mass, even more preferably from 0.13% by mass to 0.25% by mass, and even more preferably from 0.15% by mass to 0.20% by mass, from the viewpoint of being able to further suppress sedimentation of the inorganic filler (C) in the two-component liquid resin composition and being able to further improve the performance balance between the storage stability and fluidity of the two-component liquid resin composition.

[0129] In the second embodiment, the content of the anti-settling agent (D) in the first liquid is, when the entire first liquid is taken as 100% by mass, 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, and even more preferably 0.18% by mass or more, from the viewpoint of being able to suppress sedimentation of the inorganic filler (C) in the first liquid; and from the viewpoint of being able to further improve the performance balance between the storage stability and fluidity 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, and even more preferably 0.25% by mass or less. Furthermore, from the viewpoint of being able to suppress sedimentation of the inorganic filler (C) in the first liquid and from the viewpoint of further improving the performance balance between the storage stability and fluidity of the first liquid, the content of the anti-settling agent (D) in the first liquid, when the entire first liquid is taken as 100% by mass, is preferably from 0.01% by mass to 2.00% by mass, more preferably from 0.03% by mass to 2.00% by mass, even more preferably from 0.05% by mass to 1.50% by mass, even more preferably from 0.08% by mass to 1.00% by mass, even more preferably from 0.10% by mass to 0.80% by mass, even more preferably from 0.13% by mass to 0.50% by mass, even more preferably from 0.15% by mass to 0.30% by mass, and even more preferably from 0.18% by mass to 0.25% by mass.

[0130] The content of the anti-settling agent (D) in the second liquid in the second embodiment is, from the viewpoint of being able to suppress sedimentation of the inorganic filler (C) in the second liquid, 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, when the entire second liquid is taken as 100% by mass, and from the viewpoint of being able to further improve the performance balance between the storage stability and fluidity 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. Furthermore, from the viewpoint of being able to suppress sedimentation of the inorganic filler (C) in the second liquid and from the viewpoint of further improving the performance balance between the storage stability and fluidity of the second liquid, the content of the anti-settling agent (D) in the second liquid, when the entire second liquid is taken as 100% by mass, is preferably from 0.01% by mass to 2.00% by mass, more preferably from 0.01% by mass to 1.50% by mass, even more preferably from 0.01% by mass to 1.00% by mass, even more preferably from 0.01% by mass to 0.80% by mass, even more preferably from 0.01% by mass to 0.50% by mass, even more preferably from 0.01% by mass to 0.30% by mass, even more preferably from 0.03% by mass to 0.25% by mass, even more preferably from 0.05% by mass to 0.20% by mass, and even more preferably from 0.08% by mass to 0.15% by mass.

[0131] (Curing Accelerator (E)) The two-component liquid resin composition of the second embodiment preferably further contains a curing accelerator (E) from the viewpoint of accelerating the reaction between the epoxy resin (A) and the acid anhydride (B) and improving the curability of the two-component liquid resin composition. The curing accelerator (E) of the second embodiment is preferably contained in the second component from the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition.

[0132] From the viewpoint of being able to improve the curability of the two-component liquid resin composition, the curing accelerator (E) of the second embodiment preferably contains one or more selected from the group consisting of tertiary amines, quaternary ammonium salts, imidazoles, organic phosphines, and Lewis acid catalysts, and more preferably contains a quaternary ammonium salt.

[0133] The tertiary amine preferably includes one or more selected from the group consisting of trimethylamine, triethylamine, tripropylamine, tributylamine and benzyldimethylamine.

[0134] The quaternary ammonium salt preferably includes one or more selected from the group consisting of organic acid salts of diazabicycloundecene, such as octylate salt of DBU [1,8-diazabicyclo[5.4.0]undecene-7] (manufactured by San-Apro Ltd., trade name: SA102), DBN [1,5-diazabicyclo[4.3.0]-5-nonene], quaternary ammonium salts which are salts of tertiary amines and carboxylic acids (manufactured by San-Apro Ltd., trade name: U-CAT2313), octadecyltrimethylammonium chloride (manufactured by NOF Corporation, trade name: Nissan Cation), and tetraalkyl ammonium salts (each alkyl group having 1 to 18 carbon atoms) (e.g., tetraethylammonium bromide, tetrabutylammonium bromide, tetraalkylammonium carboxylates (carboxylic acid having 1 to 12 carbon atoms)). The curing accelerator (E) of the second embodiment more preferably contains an organic acid salt of diazabicycloundecene, from the viewpoint of being able to improve the curability of the two-component liquid resin composition.

[0135] The imidazoles preferably include one or more selected from the group consisting of 1-benzyl-2-methylimidazole, 2-ethyl-4-methylimidazole, 2-undecylimidazole, 1,2-dimethylimidazole and 1-benzyl-2-phenylimidazole.

[0136] The organic phosphine preferably includes one or more selected from the group consisting of triphenylphosphine, triphenylphosphine-triphenylborate, tris(p-methoxyphenyl)phosphine, and tetraphenylphosphonium tetraphenylborate.

[0137] The Lewis acid catalyst preferably includes one or more selected from the group consisting of boron trifluoride amine complex, boron trichloride amine complex, and boron trifluoride ethylamine complex.

[0138] The content of the curing accelerator (E) in the two-component liquid resin composition of the second embodiment is, when the entire two-component liquid resin composition is taken as 100% by mass, 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, and even more preferably 0.20% by mass or more, from the viewpoint of being able to improve the curability of the two-component liquid resin composition; and from the viewpoint of being able to further improve the performance balance between the storage stability and fluidity of the two-component liquid resin composition, 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. From the viewpoint of improving the curability, storage stability, and flowability of the two-component liquid resin composition, 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, when the total amount of the two-component liquid resin composition is taken as 100% by mass.

[0139] (Other Components) The two-component liquid resin composition of the second embodiment may contain, as necessary, a coupling agent, a colorant such as carbon black, an antifoaming agent such as a silicone antifoaming agent, a flame retardant, and the like.

[0140] From the viewpoint of being able to improve the interfacial strength between the epoxy resin (A) and the inorganic filler (C), the coupling agent of the second embodiment preferably contains one or more selected from the group consisting of an epoxy silane coupling agent, an amino silane coupling agent, a ureido silane coupling agent, and a mercapto silane coupling agent, and more preferably contains an epoxy silane coupling agent.

[0141] The epoxy silane coupling agent preferably includes one or more selected from the group consisting of γ-glycidoxypropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldimethoxysilane, and β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, and more preferably includes γ-glycidoxypropyltrimethoxysilane. The aminosilane coupling agent preferably includes one or more selected from the group consisting of 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-(trimethoxysilylpropyl)-1,3-benzenedimethanane. The ureidosilane coupling agent preferably includes one or more selected from the group consisting of γ-ureidopropyltriethoxysilane and hexamethyldisilazane.

[0142] From the viewpoint of improving the interfacial strength between the epoxy resin (A) and the inorganic filler (C), the content of the coupling agent in the two-component liquid resin composition of the second embodiment is, when the entire two-component liquid resin composition is taken as 100% by mass, 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 is 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, even more preferably 0.20% by mass or less. From the viewpoint of improving the interfacial strength between the epoxy resin (A) and the inorganic filler (C), the content of the 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, when the entire two-component liquid resin composition is taken as 100% by mass.

[0143] The colorant of the second embodiment preferably contains one or more selected from the group consisting of carbon black, titanium oxide, barium sulfate, iron black, red iron oxide, aniline black, and alizanin, and more preferably contains carbon black.

[0144] The content of the colorant in the two-component liquid resin composition of the second embodiment is, when the entire two-component liquid resin composition is taken as 100% by mass, 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 is 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, even more preferably 0.10% by mass or less. Furthermore, the content of the colorant in the two-component liquid resin composition, when the entire two-component liquid resin composition is taken as 100% by mass, 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.

[0145] The defoaming agent of the second embodiment preferably includes one or more selected from the group consisting of a silicone-based defoaming agent, a fluorine-based defoaming agent, and a polymer-based defoaming agent, and more preferably includes a silicone-based defoaming agent.

[0146] The content of the defoaming agent in the two-component liquid resin composition of the second embodiment is, when the total weight of the two-component liquid resin composition is taken as 100% by weight, preferably 0.01% by weight or more, more preferably 0.03% by weight or more, even more preferably 0.05% by weight or more, even more preferably 0.08% by weight or more, and preferably 1.00% by weight or less, more preferably 0.80% by weight or less, even more preferably 0.60% by weight or less, even more preferably 0.40% by weight or less, even more preferably 0.20% by weight or less. The content of the defoaming agent in the two-component liquid resin composition is, when the total weight of the two-component liquid resin composition is taken as 100% by weight, preferably 0.01% by weight or more and 1.00% by weight or less, more preferably 0.01% by weight or more and 0.80% by weight or less, even more preferably 0.03% by weight or more and 0.60% by weight or less, even more preferably 0.05% by weight or more and 0.40% by weight or less, even more preferably 0.08% by weight or more and 0.20% by weight or less.

[0147] From the viewpoint of further improving 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 the group consisting of aluminum hydroxide, magnesium hydroxide, zinc borate, zinc molybdate, antimony trioxide, antimony pentoxide, phosphazene, brominated epoxy resin, and brominated polycarbonate.

[0148] 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, and more preferably 5.0% by mass or more and 30% by mass or less, when the entire two-component liquid resin composition is taken as 100% by mass, from the viewpoint of further improving the flame retardancy of the cured product of the two-component liquid resin composition.

[0149] (Method for producing two-component liquid resin composition) A method for producing a two-component liquid resin composition of the second embodiment will be described in detail. The two-component liquid resin composition of the second embodiment can be produced by thoroughly mixing and stirring, by a known method, the epoxy resin (A), inorganic filler (C), anti-settling agent (D), and other components as the first component, and the acid anhydride (B), inorganic filler (C), anti-settling agent (D), and other components as the second component, among the above-mentioned components. When the two-component liquid resin composition of the second embodiment contains the curing accelerator (E), the second component preferably contains the curing accelerator (E).

[0150] Methods for mixing and stirring the components to obtain the first or second liquid in the two-component liquid resin composition of the second embodiment include methods using a mixer or other mixing machine, or a kneader such as a roll or kneader.

[0151] The two-component liquid resin composition of the second embodiment is used in the form of a mixed liquid obtained by mixing the first and second liquids. Examples of a method for mixing the first and second liquids include a method using a mixer or other mixer, or a kneader or other kneading machine.

[0152] In the two-component liquid resin composition of the second embodiment, the content of the second liquid when the first liquid and the second liquid are further mixed is preferably 50 parts by mass or more, more preferably 70 parts by mass or more, even 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 even more preferably 110 parts by mass or less, per 100 parts by mass of the first liquid, from the viewpoint of further improving the performance balance of the two-component liquid resin composition among the fluidity, heat resistance upon curing, and mechanical properties. Furthermore, the content of the second liquid when the first liquid and the second liquid are further mixed 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 less, per 100 parts by mass of the first liquid, from the viewpoint of further improving the performance balance of the fluidity, heat resistance upon curing, and mechanical properties of the two-component liquid resin composition.

[0153] Third Embodiment [Two-component liquid resin composition] A two-component liquid resin composition of a third embodiment is a two-component liquid resin composition comprising a first liquid and a second liquid, wherein the first liquid contains an epoxy resin (A), an inorganic filler (C), and an anti-settling agent (D), and the second liquid contains an acid anhydride (B), an inorganic filler (C), and an anti-settling agent (D), and the viscosity η of the first liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 60°C is ５Ａ is 1.0 Pa·s or more and 15.0 Pa·s or less.

[0154] The two-component liquid resin composition of the third embodiment satisfies the above-mentioned constitution, and thereby the performance balance of storage stability and fluidity can be improved. In the two-component liquid resin composition of the third embodiment, the viscosity η of the first component in the two-component liquid resin composition at 60°C is ５Ａ is within the above-mentioned range, the fluidity of the first liquid at rest becomes favorable from the viewpoint of storage stability, and sedimentation of the inorganic filler (C) in the first liquid is thought to be physically suppressed. As a result, it is thought that the two-component liquid resin composition of the third embodiment can improve the performance balance of storage stability in the states of the first and second liquids and fluidity suitable for casting workability.

[0155] In the two-component liquid resin composition of the third embodiment, the viscosity η ５Ａ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the third embodiment is preferably 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, and even more preferably 1.9 Pa·s or more, and is 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. ５Ａ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the third embodiment is preferably 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, and even more preferably 1.9 Pa·s or more and 4.0 Pa·s or less. ５Ａ indicates the viscosity one minute after the cone rotor set in the E-type viscometer starts to rotate.

[0156] In the two-component liquid resin composition of the third embodiment, the viscosity η of the first component is measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 60° C. １０Ａ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the third embodiment is preferably 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, and even more preferably 1.8 Pa·s or more, and is preferably 15.0 Pa·s or less, more preferably 14.0 Pa·s or less, and even more preferably 13.0 Pa·s or less. １０ＡFrom the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the third embodiment is preferably 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, and even more preferably 1.8 Pa·s or more and 13.0 Pa·s or less. １０Ａ indicates the viscosity one minute after the cone rotor set in the E-type viscometer starts to rotate.

[0157] In the two-component liquid resin composition of the third embodiment, the viscosity η １０Ａ The above viscosity η ５Ａ Viscosity ratio Ti Ａ (η ５Ａ / η １０Ａ From the viewpoint of further improving the balance of storage stability and fluidity of the two-component liquid resin composition, the viscosity ratio Ti Ａ (η ５Ａ / η １０Ａ ) is preferably 0.1 or more and 1.5 or less, more preferably 0.3 or more and 1.5 or less, even more preferably 0.5 or more and 1.3 or less, and still more preferably 0.8 or more and 1.1 or less, from the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition.

[0158] In the two-component liquid resin composition of the third embodiment, the viscosity η of the second liquid is measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 25° C. ５ＢFrom the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the third embodiment is preferably 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, and even more preferably 20.0 Pa·s or more, and is 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. ５Ｂ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the third embodiment is preferably 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, and even more preferably 20.0 Pa·s or more and 25.0 Pa·s or less. ５Ｂ indicates the viscosity one minute after the cone rotor set in the E-type viscometer starts to rotate.

[0159] In the two-component liquid resin composition of the third embodiment, the viscosity η of the second liquid is measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. １０ＢFrom the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the third embodiment is preferably 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, and even more preferably 15.0 Pa·s or more, and is 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, and even more preferably 20.0 Pa·s or less. １０Ｂ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the third embodiment is preferably 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, and even more preferably 15.0 Pa·s or more and 20.0 Pa·s or less. １０Ｂ indicates the viscosity one minute after the cone rotor set in the E-type viscometer starts to rotate.

[0160] In the two-component liquid resin composition of the third embodiment, the viscosity η １０Ｂ The above viscosity η ５Ｂ Viscosity ratio Ti Ｂ (η ５Ｂ / η １０Ｂ From the viewpoint of further improving the balance of storage stability and fluidity of the two-component liquid resin composition, the viscosity ratio Ti Ｂ (η ５Ｂ / η １０Ｂ ) is preferably 0.5 or more and 2.5 or less, more preferably 0.5 or more and 2.2 or less, even more preferably 0.5 or more and 2.0 or less, even more preferably 0.5 or more and 1.7 or less, even more preferably 0.8 or more and 1.5 or less, and even more preferably 1.0 or more and 1.3 or less, from the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition.

[0161] In the two-component liquid resin composition of the third embodiment, 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 cone rotor at a rotation speed of 5 rpm and a temperature of 60° C. ５Ｐ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the third embodiment is preferably 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 even more preferably 3.5 Pa·s or more, and is 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, and even more preferably 10.0 Pa·s or less. ５Ｐ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the third embodiment is preferably 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, and even more preferably 3.5 Pa·s or more and 10.0 Pa·s or less. ５Ｐ indicates the viscosity one minute after the cone rotor set in the E-type viscometer starts to rotate.

[0162] In the two-component liquid resin composition of the third embodiment, 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 cone rotor at a rotation speed of 10 rpm and a temperature of 60° C. １０Ｐ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the third embodiment is preferably 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, and even more preferably 3.0 Pa·s or more, and is 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. １０Ｐ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity η of the two-component liquid resin composition of the third embodiment is preferably 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, and even more preferably 3.0 Pa·s or more and 5.0 Pa·s or less. １０Ｐ indicates the viscosity one minute after the cone rotor set in the E-type viscometer starts to rotate.

[0163] In the two-component liquid resin composition of the third embodiment, the viscosity η １０Ｐ The above viscosity η ５Ｐ Viscosity ratio Ti Ｐ (η ５Ｐ / η １０ＰFrom the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the viscosity ratio Ti Ｐ (η ５Ｐ / η １０Ｐ ) is preferably 0.5 or more and 2.0 or less, more preferably 0.5 or more and 1.9 or less, even more preferably 0.6 or more and 1.8 or less, even more preferably 0.7 or more and 1.7 or less, even more preferably 0.8 or more and 1.6 or less, even more preferably 0.9 or more and 1.5 or less, even more preferably 1.0 or more and 1.4 or less, and even more preferably 1.1 or more and 1.3 or less, from the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition.

[0164] The components used in the resin composition of the third embodiment will be described in detail below.

[0165] (Epoxy Resin (A)) The two-part liquid resin composition of the third embodiment contains an epoxy resin (A). From the viewpoint of further improving the performance balance of strength, hardness, elastic modulus, thermal expansion coefficient, thermal conductivity, heat dissipation, and electrical properties of a cured product of the two-part liquid resin composition, the epoxy resin of the third embodiment is preferably an alicyclic epoxy resin; a bisphenol type epoxy resin such as a bisphenol A type epoxy resin, a bisphenol F type epoxy resin, a bisphenol E type epoxy resin, a bisphenol S type epoxy resin, a bisphenol M type epoxy resin (4,4'-(1,3-phenylenediisopridiene)bisphenol type epoxy resin), a bisphenol P type epoxy resin (4,4'-(1,4-phenylenediisopridiene)bisphenol type epoxy resin), or a bisphenol Z type epoxy resin (4,4'-cyclohexidienebisphenol type epoxy resin); a phenol novolac type epoxy resin, a cresol novolac type epoxy resin, a trisphenol group methane type novolac type epoxy resin, or a tetraphenol group ethoxylated epoxy resin. novolac type epoxy resins such as amine type novolac type epoxy resins and novolac type epoxy resins having a condensed ring aromatic hydrocarbon structure; 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; aryl alkylene type epoxy resins such as xylylene type epoxy resins and biphenyl aralkyl type epoxy resins; naphthalene type epoxy resins such as naphthylene ether type epoxy resins, naphthol type epoxy resins, naphthalene diol type epoxy resins, difunctional to tetrafunctional epoxy type naphthalene resins, binaphthyl 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;It contains one or more types selected from the group consisting of fluorene-type epoxy resins, more preferably one or more types selected from the group consisting of alicyclic epoxy resins, bisphenol A-type epoxy resins, bisphenol F-type epoxy resins, and aminophenol-type epoxy resins, and even more preferably one or more types selected from the group consisting of alicyclic epoxy resins, bisphenol A-type epoxy resins, and bisphenol F-type epoxy resins, and from the viewpoint of further improving the performance balance between low viscosity and fluidity of the two-component liquid resin composition, it is even more preferable that it contains an alicyclic epoxy resin;

[0166] The cycloaliphatic epoxy resin of the third embodiment preferably includes an cycloaliphatic epoxy resin that is liquid at 25°C, and more preferably includes an epoxy-[epoxy-oxaspiro C] such as vinylcyclopentadiene dioxide, vinylcyclohexene monodioxide, vinylcyclohexene dioxide, dicyclopentadiene oxide, or 3,4-epoxy-1-[8,9-epoxy-2,4-dioxaspiro[5.5]undecan-3-yl]-cyclohexane. ８－１５ Alkyl]-cycloC ５－１２ Alkanes; epoxy C such as 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexanecarboxylate and 4,5-epoxycyclooctylmethyl-4',5'-epoxycyclooctanecarboxylate ５－１２ Cycloalkyl C １－３ Alkyl-epoxy C ５－１２ Cycloalkane carboxylates; bis(C) such as bis(2-methyl-3,4-epoxycyclohexylmethyl) adipate １－３ Alkyl Epoxy C ５－１２ Cycloalkyl C １－３ and more preferably, the epoxy C ５－１２ Cycloalkyl C １－３ Alkyl-epoxy C ５－１２The cycloalkane carboxylate is preferably 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylate, and more preferably 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylate. A commercially available product of 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexane carboxylate is preferably CELLOXIDE #2021P (epoxy equivalent: 128 to 140) manufactured by Daicel Corporation.

[0167] When the epoxy resin (A) of the third embodiment contains an alicyclic epoxy resin, 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, and even more preferably 95 parts by mass or more, relative to 100 parts by mass of the epoxy resin (A), from the viewpoint of further improving the fluidity of the two-component liquid resin composition. The upper limit is not particularly limited, but may be, for example, 100 parts by mass or less. From the viewpoint of further improving the fluidity of the two-component liquid resin composition, the content of the 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, when the content of the epoxy resin (A) is taken as 100 parts by mass.

[0168] The content of the epoxy resin (A) in the two-component liquid resin composition of the third embodiment is, when the total amount of the two-component liquid resin composition is taken as 100% by mass, 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, and even more preferably 6% by mass or more, from the viewpoint of further improving the performance balance of the strength, hardness, elastic modulus, thermal expansion coefficient, thermal conductivity, heat dissipation property, and electrical properties of a cured product of the two-component liquid resin composition; and, from the viewpoint of further improving the performance balance of the storage stability and fluidity of the two-component liquid resin composition, 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, and even more preferably 13% by mass or less. Furthermore, from the viewpoint of further improving the storage stability and flowability of the two-component liquid resin composition and the performance balance of the strength, hardness, elastic modulus, thermal expansion coefficient, thermal conductivity, heat dissipation properties, and electrical properties of a cured product of the two-component liquid resin composition, the content of the 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, and even more preferably 6% by mass or more and 13% by mass or less, when the total amount of the two-component liquid resin composition is taken as 100% by mass.

[0169] (Acid Anhydride (B)) 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).

[0170] As the acid anhydride (B) of the third embodiment, from the viewpoint of improving the curability of the two-component liquid resin composition, preferably dodecenyl succinic anhydride, polyadipic anhydride, polyazelaic anhydride, polysebacic anhydride, poly(ethyloctadecanedioic) anhydride, poly(phenylhexadecanedioic) anhydride, methyltetrahydrophthalic anhydride, methylhexahydrophthalic anhydride, hexahydrophthalic anhydride, methylhimic anhydride, tetrahydrophthalic anhydride, trialkyltetrahydrophthalic anhydride, methylcyclohexene dicarboxylic anhydride, phthalic anhydride, trimellitic anhydride, pyromellitic anhydride, benzophenone tetracarboxylic anhydride, ethylene glycol bistrimellitate, HET anhydride, tetrahydrophthalic anhydride, methylnadic anhydride (methyl-5-norbornene and from the viewpoint of further improving the performance balance of the storage stability and fluidity of the two-component liquid resin composition, more preferably the two-component liquid resin composition contains one or more selected from the group consisting of methyl-5-norbornene-2,3-dicarboxylic anhydride, methylcyclohexane-1,2-dicarboxylic anhydride, methyltetrahydrophthalic anhydride (methyl-3,6-endomethylene-1,2,3,6-tetrahydrophthalic anhydride), methylcyclohexane-1,2-dicarboxylic anhydride, 5-(2,5-dioxotetrahydro-3-furanyl)-3-methyl-3-cyclohexane-1,2-dicarboxylic anhydride, and even more preferably the two-component liquid resin composition contains one or more selected from the group consisting of methyl-5-norbornene-2,3-dicarboxylic anhydride, methylcyclohexane-1,2-dicarboxylic anhydride, and methyltetrahydrophthalic anhydride.

[0171] The content of the acid anhydride (B) in the two-component liquid resin composition of the third embodiment is, when the total two-component liquid resin composition is taken as 100% by mass, 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, from the viewpoint of improving the curability of the two-component liquid resin composition, and from the viewpoint of further improving the performance balance of the storage stability and fluidity of the two-component liquid resin composition, 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. Furthermore, the content of the acid anhydride (B) in the two-component liquid resin composition is, when the total two-component liquid resin composition is taken as 100% by mass, 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, from the viewpoint of improving the performance balance of the storage stability, fluidity, and curability of the two-component liquid resin composition.

[0172] (Inorganic Filler (C)) The two-component liquid resin composition of the third embodiment contains an inorganic filler (C). From the viewpoint of further improving the performance balance of the strength, hardness, elastic modulus, thermal expansion coefficient, thermal conductivity, heat dissipation, and electrical properties of a cured product of the two-component liquid resin composition, the inorganic filler (C) preferably contains one or more selected from the group consisting of silica, alumina, zircon, iron oxide, zinc oxide, titanium oxide, silicon nitride, boron nitride, aluminum nitride, silicon carbide, glass fiber, glass flake, alumina fiber, carbon fiber, graphite, carbon black, ferrite, graphite, aluminum hydroxide, magnesium hydroxide, calcium carbonate, manganese carbonate, magnesium carbonate, barium sulfate, potassium titanate, calcium silicate, inorganic balloons, and silver powder. From the viewpoint of further improving the performance balance of the storage stability and fluidity of the two-component liquid resin composition, the inorganic filler (C) more preferably contains one or more selected from the group consisting of silica, alumina, aluminum hydroxide, and calcium carbonate. The inorganic filler may be subjected to a surface treatment, such as alkylation, trimethylsilylation, silicone treatment, or treatment with a silane coupling agent, but is not particularly limited thereto.

[0173] The shape of the inorganic filler (C) of the third embodiment is preferably fibrous, amorphous, or spherical from the viewpoint of further improving the performance balance of the strength, hardness, elastic modulus, thermal expansion coefficient, thermal conductivity, heat dissipation, and electrical properties of the cured product of the two-component liquid resin composition, and more preferably spherical from the viewpoint of further improving the performance balance of the storage stability and fluidity of the two-component liquid resin composition. Here, spherical may be a true sphere, an ellipse, or a nearly spherical shape including an oval shape. The inorganic filler (C) of the third embodiment has an aspect ratio (ratio of major axis to minor axis) of preferably 1.3 or less, more preferably 1.2 or less, and even more preferably 1.1 or less.

[0174] The average particle diameter D of the inorganic filler (C) of the third embodiment when the cumulative value is 50% in the volume frequency particle size distribution measured by a laser diffraction scattering method ５０From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the average particle diameter D is preferably 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 is 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. ５０ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the average particle diameter D is preferably 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, and even more preferably 20.0 μm or more and 30.0 μm or less. ５０ Within the range of two or more different average particle diameters D ５０ The composition may include an inorganic filler having the formula:

[0175] The average particle diameter D of the inorganic filler (C) of the third embodiment ５０ can be measured by a laser diffraction scattering measurement method using a laser diffraction particle size distribution measuring device (for example, SALD-7000 manufactured by Shimadzu Corporation).

[0176] From the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition, the content of the inorganic filler (C) in the two-component liquid resin composition of the third embodiment is, when the entire two-component liquid resin composition is taken as 100% by mass, 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 84% by mass or less, even more preferably 83% by mass or less, even more preferably 82% by mass or less. Furthermore, from the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition, the content of the inorganic filler (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, when the entire two-component liquid resin composition is taken as 100% by mass.

[0177] From the viewpoint of further improving the performance balance between the storage stability and fluidity of the first liquid, the content of the inorganic filler (C) in the first liquid in the third embodiment is, when the entire first liquid is taken as 100% by mass, 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 is 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. Furthermore, from the viewpoint of further improving the performance balance between the storage stability and fluidity of the first liquid, the content of the inorganic filler (C) in the first liquid, when the entire first liquid is taken as 100% by mass, 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, and even more preferably 77% by mass or more and 88% by mass or less.

[0178] In the third embodiment, the content of the inorganic filler (C) in the second liquid is, when the entire second liquid is taken as 100% by mass, 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, from the viewpoint of further improving the performance balance between the storage stability and flowability of the second liquid. Furthermore, the content of the inorganic filler (C) in the second liquid is, when the entire second liquid is taken as 100% by mass, 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, even more preferably 73% by mass or more and 77% by mass or less, from the viewpoint of further improving the performance balance between the storage stability and flowability of the second liquid.

[0179] (Anti-settling agent (D)) The anti-settling agent (D) of the third embodiment preferably contains one or more selected from the group consisting of inorganic thickeners (excluding the above-mentioned inorganic filler (C)) and dispersants, and more preferably contains an inorganic thickener. By containing one or more selected from the group consisting of inorganic thickeners and dispersants as the anti-settling agent (D), sedimentation of the inorganic filler (C) in the two-component liquid resin composition can be further suppressed.

[0180] Inorganic Thickener The inorganic thickener of the third embodiment preferably contains a layered inorganic mineral, from the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition.

[0181] The layered inorganic mineral of the third embodiment preferably contains one or more selected from the group consisting of clay and talc, and more preferably contains an organo-clay, from the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition.

[0182] The clay of the third embodiment preferably contains one or more types selected from the group consisting of kaolin, smectite, illite, bentonite (montmorillonite), hectorite, pyrophyllite, attapulgite, sepiolite, and laponite, and more preferably contains bentonite from the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition. The organized clay of the third embodiment preferably comprises one or more selected from the group consisting of organized kaolin, organized smectite, organized illite, organized bentonite (organized montmorillonite), organized hectorite, organized pyrophyllite, organized attapulgite, organized sepiolite, and organized laponite. From the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition, the organized clay more preferably comprises organized bentonite, even more preferably comprises bentonite ion-exchanged with a quaternary ammonium salt, even more preferably comprises bentonite ion-exchanged with a quaternary alkylammonium salt, even more preferably comprises bentonite ion-exchanged with a quaternary alkylammonium salt containing at least one alkyl group having from 6 to 24 carbon atoms, and even more preferably comprises bentonite ion-exchanged with a quaternary alkylammonium salt containing at least one alkyl group having from 12 to 22 carbon atoms. Here, the organized clay is a layered silicate (clay) in which an organic compound is intercalated between the layers of the layered silicate planes. Interlayer cations, such as sodium and calcium ions, exist between the layered silicate planes to maintain the layered crystal structure. By ion-exchanging the interlayer cations with organic cations, the organic compounds are chemically bonded to the surface of the silicate planes and inserted between the layers.

[0183] In the organized clay, the organic compound ion-exchanged with the intermediate layer cation preferably contains a quaternary ammonium salt, more preferably a quaternary alkylammonium salt, even more preferably a quaternary alkylammonium salt containing at least one alkyl group having from 6 to 24 carbon atoms, even more preferably a quaternary alkylammonium salt containing at least one alkyl group having from 12 to 22 carbon atoms, and even more preferably one or more selected from the group consisting of trimethylstearylammonium salt, dimethylstearylbenzylammonium salt, dimethyloctadecylammonium salt, oleylbis(2-hydroxyethyl)methylammonium salt, dimethylstearylammonium salt, benzyldimethylstearylammonium salt, and dimethyldistearylammonium salt.

[0184] Commercially available examples of the organized bentonite used in the third embodiment include Benton 34, Benton SD-1, Benton SD-2, Benton SD-3, Benton 57, and Benton 52 manufactured by ELEMENTIS, Inc.; 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 Kogyo Co., Ltd. Commercially available examples of the organized hectorite used in the third embodiment include Benton 27 and Benton 38 manufactured by ELEMENTIS, Inc.

[0185] Dispersant: From the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition, the dispersant of the third embodiment preferably includes an ester compound containing a long-chain hydrocarbon group, more preferably one or more selected from the group consisting of a carboxylic acid ester compound containing a long-chain hydrocarbon group, a phosphate ester compound containing a long-chain hydrocarbon group, a sulfate ester compound containing a long-chain hydrocarbon group, a nitrate ester compound containing a long-chain hydrocarbon group, and a carbonate ester compound containing a long-chain hydrocarbon group, and even more preferably one or more selected from the group consisting of a carboxylic acid ester compound containing a long-chain hydrocarbon group and a phosphate ester compound containing a long-chain hydrocarbon group. Such ester compounds containing a long-chain hydrocarbon group can suppress secondary aggregation of the inorganic filler (C) due to steric hindrance caused by the long-chain hydrocarbon group, and are therefore thought to further improve the performance balance between the storage stability and fluidity of the two-component liquid resin composition.

[0186] In order to further improve the balance of storage stability and fluidity of the two-component liquid resin composition, the long-chain hydrocarbon group in the ester compound according to the third embodiment preferably comprises one or more groups selected from the group consisting of alkylene groups, alkyl groups, alkenyl groups, aralkyl groups, aryl groups, and aryl groups in which one, two, or three hydrogen atoms of the hydrocarbon are substituted with a substituent, and more preferably comprises one or more groups selected from the group consisting of alkylene groups, alkyl groups, and alkenyl groups. The long-chain hydrocarbon group may be linear or branched. Some of the hydrogen atoms in the long-chain hydrocarbon group may be substituted with a substituent such as a hydroxy group, aldehyde group, carbonyl group, carboxy group, amino group, nitro group, sulfo group, or halogeno group. The long-chain hydrocarbon group may also include an oxygen-containing linking group such as an ether bond or an ester bond in the long chain.

[0187] From the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition, the ester group in the ester compound containing a long-chain hydrocarbon group of the third embodiment preferably contains one or more types selected from the group consisting of a carboxylic acid ester group, a phosphate ester group, a sulfate ester group, a nitrate ester group, and a carbonate ester group, and more preferably contains one or more types selected from the group consisting of a carboxylic acid ester group and a phosphate ester group.

[0188] From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the number of carbon atoms in the long-chain hydrocarbon group in the ester compound containing a long-chain hydrocarbon group according to the third embodiment is preferably 4 or more, more preferably 6 or more, even more preferably 8 or more, and even more preferably 10 or more, and is 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. Furthermore, from the viewpoint of further improving the performance balance between storage stability and fluidity 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.

[0189] From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the weight average molecular weight of the ester compound containing a long-chain hydrocarbon group according to 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, and even more preferably 800 or more, and is 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. Furthermore, from the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the weight 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.

[0190] The ester compound containing a long-chain hydrocarbon group of the third embodiment preferably contains one or more compounds selected from the group consisting of polyhydroxycarboxylic acid esters, acidic phosphate esters, and carboxyl group-containing modified polymers, from the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition.

[0191] The polyhydroxycarboxylic acid ester of the third embodiment preferably contains a compound represented by the following general formula (Ic), from the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition.

[0192]

[0193] In the general formula (Ic), v and y each independently represent 1 or 2, w represents an integer of 0 to 10, and x represents an integer of 14 to 40. ｗ - (CH ２ ) ｘ - is w consecutive (CH=CH)s linked together, followed by (CH ２ ) may be linked in a block structure of x consecutive units, or (CH=CH) and (CH ２) may be arranged randomly.

[0194] In the general formula (Ic), from the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, w is preferably an integer of 0 or more and 8 or less. In addition, from the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, x is preferably an integer of 18 or more and 36 or less.

[0195] An example of a commercially available polyhydroxycarboxylic acid ester of the third embodiment is BYK-R606 manufactured by BYK Japan.

[0196] The acidic phosphate ester of the third embodiment preferably contains a compound represented by the following general formula (IIc), from the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition.

[0197]

[0198] In the above general formula (IIc), R １ is a saturated or unsaturated hydrocarbyl group having from 4 to 20 carbon atoms, R ２ is a saturated hydrocarbylene group having 1 to 20 carbon atoms, and R ３ is a saturated hydrocarbylene group having 2 or 3 carbon atoms, and R ４ is a saturated or unsaturated hydrocarbylene group having 1 to 8 carbon atoms, k, l, and m are each an integer of 0 to 20, and n is 1 or 2. １ If there are multiple R １ may be the same or different, R ２ If there are multiple R ２ may be the same or different, R ３ If there are multiple R ３ may be the same or different, R ４ If there are multiple R ４ may be the same or different. ２ O- group, 1 -R ３ O- group and m -COR ４The order of the COO- groups is arbitrary. When n=2, two R １ O (COR ２ O) ｋ (R ３ O) ｌ (COR ４ COO) ｍ The groups may be the same or different.

[0199] In the above general formula (IIc), R １ is not particularly limited as long as it is a saturated or unsaturated hydrocarbyl group having from 4 to 20 carbon atoms. １ preferably contains one or more groups selected from the group consisting of saturated hydrocarbon groups and unsaturated hydrocarbon groups. The saturated hydrocarbon group preferably contains one or more groups selected from the group consisting of octyl, 2-ethylhexyl, nonyl, decyl, undecyl, dodecyl, tetradecyl, hexadecyl, and octadecyl groups. The unsaturated hydrocarbon group preferably contains one or more groups selected from the group consisting of phenyl and nonylphenyl groups. R １ The number of carbon atoms in R is preferably 6 or more and 18 or less, from the viewpoint of further improving the balance of storage stability and fluidity of the two-component liquid resin composition. １ The number of carbon atoms is preferably 10 or more and 18 or less.

[0200] In the above general formula (IIc), R ２ is a saturated hydrocarbylene group having 1 to 20 carbon atoms. ２ The number of carbon atoms in R is preferably 1 or more and 16 or less. ２ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, preferably contains one or more selected from the group consisting of a methylene group, an ethylene group, a pentylene group, a tetradecylene group and a pentadecylene group.

[0201] In the above general formula (IIc), R ３ is a saturated hydrocarbylene group having 2 or 3 carbon atoms. ３is preferably a saturated hydrocarbylene group having 2 carbon atoms, more preferably an ethylene group, from the viewpoint of further improving the balance of storage stability and flowability of the two-component liquid resin composition.

[0202] In the above general formula (IIc), R ４ is a saturated or unsaturated hydrocarbylene group having 1 to 8 carbon atoms. ４ The number of carbon atoms in R is preferably 1 or more and 6 or less. ４ From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, preferably contains one or more selected from the group consisting of a methylene group, an ethylene group, a propylene group, a butylene group, a pentylene group and a phenyl group.

[0203] In the general formula (IIc), k, l and m are preferably integers of 0 to 10, from the viewpoint of further improving the balance of storage stability and fluidity of the two-component liquid resin composition.

[0204] In the general formula (IIc), the monomer unit represented by k, l, and m, i.e., k -COR ２ O- group, 1 -R ３ O- group and m -COR ４ The COO- group is R １ The order of arrangement between the O-group and the phosphorus atom is arbitrary. These groups do not necessarily have to be arranged as in general formula (IIc). ２ O) ｋ (R ３ O) ｌ (COR ４ COO) ｍ The - group may be a block copolymer or a random copolymer.

[0205] An example of a commercially available acidic phosphate ester according to the third embodiment is BYK-W9010 manufactured by BYK Japan.

[0206] The carboxyl group-containing modified polymer of the third embodiment includes an ester compound of an α-olefin-maleic anhydride copolymer and a monohydric alcohol. Such an ester compound has a controlled arrangement of a hydrophobic moiety, such as a hydrocarbon group derived from the α-olefin, and a hydrophilic moiety, such as a carboxyl group, formed by ring-opening addition of a maleic anhydride group derived from the maleic anhydride.

[0207] From the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition, the α-olefins constituting the ester compound of the α-olefin-maleic anhydride copolymer and monohydric alcohols of the third embodiment preferably contain linear or branched unsaturated hydrocarbons having 6 or more carbon atoms, and preferably contain unsaturated hydrocarbons having 6 to 30 carbon atoms. The unsaturated hydrocarbons having 6 to 30 carbon atoms preferably contain one or more species selected from the group consisting of 1-dodecene and 1-tetradecene.

[0208] The monohydric alcohol constituting the ester compound of the α-olefin-maleic anhydride copolymer and the monohydric alcohol of the third embodiment preferably includes one or more selected from the group consisting of aliphatic alcohols, aromatic alcohols, and polyalkylene glycol monoalkyl ethers, from the viewpoint of further improving the performance balance between storage stability and fluidity of the two-component liquid resin composition.

[0209] The fatty alcohol in the third embodiment preferably includes one or more selected from the group consisting of cetyl alcohol and stearyl alcohol.

[0210] The aromatic alcohol in the third embodiment preferably includes one or more selected from the group consisting of 1-phenyl-1-propanol and α-phenoxy-2-propanol.

[0211] The polyalkylene glycol monoalkyl ether of the third embodiment preferably comprises a polyethylene glycol monoalkyl ether having a molecular weight of 400 to 700.

[0212] The acid value of the carboxyl group-containing modified polymer of the third embodiment is preferably 10 mgKOH / g or more and 100 mgKOH / g or less, more preferably 15 mgKOH / g or more and 60 mgKOH / g or less.

[0213] Commercially available products of the carboxyl group-containing modified polymer of the third embodiment include, for example, FLOWLEN G-700, FLOWLEN G-900, FLOWLEN G-1500, and NC-500 manufactured by Kyoeisha Chemical Co., Ltd.

[0214] The content of the anti-settling agent (D) in the two-component liquid resin composition of the third embodiment, when the entire two-component liquid resin composition is taken as 100% by mass, 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, from the viewpoint of being able to further suppress sedimentation of the inorganic filler (C) in the two-component liquid resin composition; and 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, from the viewpoint of being able to further improve the performance balance between the storage stability and fluidity of the two-component liquid resin composition. Furthermore, the content of the anti-settling agent (D) in the two-component liquid resin composition, when the entire two-component liquid resin composition is taken as 100% by mass, is preferably from 0.01% by mass to 2.00% by mass, more preferably from 0.01% by mass to 1.50% by mass, even more preferably from 0.01% by mass to 1.00% by mass, still more preferably from 0.01% by mass to 0.80% by mass, even more preferably from 0.01% by mass to 0.50% by mass, still more preferably from 0.03% by mass to 0.30% by mass, even more preferably from 0.05% by mass to 0.20% by mass, and still more preferably from 0.08% by mass to 0.15% by mass, from the viewpoint of being able to further suppress sedimentation of the inorganic filler (C) in the two-component liquid resin composition and being able to further improve the performance balance between the storage stability and fluidity of the two-component liquid resin composition.

[0215] The content of the anti-settling agent (D) in the first liquid in the third embodiment is, from the viewpoint of being able to suppress sedimentation of the inorganic filler (C) in the first liquid, 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, when the entire first liquid is taken as 100% by mass, and from the viewpoint of being able to further improve the performance balance between the storage stability and fluidity 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. Furthermore, from the viewpoint of being able to suppress sedimentation of the inorganic filler (C) in the first liquid and from the viewpoint of further improving the performance balance between the storage stability and fluidity of the first liquid, the content of the anti-settling agent (D) in the first liquid, when the entire first liquid is taken as 100% by mass, is preferably from 0.01% by mass to 2.00% by mass, more preferably from 0.01% by mass to 1.50% by mass, even more preferably from 0.01% by mass to 1.00% by mass, even more preferably from 0.01% by mass to 0.80% by mass, even more preferably from 0.01% by mass to 0.50% by mass, even more preferably from 0.03% by mass to 0.30% by mass, even more preferably from 0.05% by mass to 0.20% by mass, and even more preferably from 0.08% by mass to 0.15% by mass.

[0216] The content of the anti-settling agent (D) in the second liquid in the third embodiment is, from the viewpoint of being able to suppress sedimentation of the inorganic filler (C) in the second liquid, 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, when the entire second liquid is taken as 100% by mass, and from the viewpoint of being able to further improve the performance balance between the storage stability and fluidity 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. Furthermore, from the viewpoint of being able to suppress sedimentation of the inorganic filler (C) in the second liquid and from the viewpoint of further improving the performance balance between the storage stability and fluidity of the second liquid, the content of the anti-settling agent (D) in the second liquid, when the entire second liquid is taken as 100% by mass, 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, and even more preferably 0.08% by mass or more and 0.15% by mass or less.

[0217] (Curing Accelerator (E)) The two-component liquid resin composition of the third embodiment preferably further contains a curing accelerator (E) from the viewpoint of accelerating the reaction between the epoxy resin (A) and the acid anhydride (B) and improving the curability of the two-component liquid resin composition. The curing accelerator (E) of the third embodiment is preferably contained in the second component from the viewpoint of further improving the performance balance between the storage stability and fluidity of the two-component liquid resin composition.

[0218] From the viewpoint of being able to improve the curability of the two-component liquid resin composition, the curing accelerator (E) of the third embodiment preferably contains one or more selected from the group consisting of tertiary amines, quaternary ammonium salts, imidazoles, organic phosphines, and Lewis acid catalysts, and more preferably contains a quaternary ammonium salt.

[0219] The tertiary amine preferably includes one or more selected from the group consisting of trimethylamine, triethylamine, tripropylamine, tributylamine and benzyldimethylamine.

[0220] The quaternary ammonium salt preferably includes one or more selected from the group consisting of organic acid salts of diazabicycloundecene, such as octylate salt of DBU [1,8-diazabicyclo[5.4.0]undecene-7] (manufactured by San-Apro Ltd., trade name: SA102), DBN [1,5-diazabicyclo[4.3.0]-5-nonene], quaternary ammonium salts which are salts of tertiary amines and carboxylic acids (manufactured by San-Apro Ltd., trade name: U-CAT2313), octadecyltrimethylammonium chloride (manufactured by NOF Corporation, trade name: Nissan Cation), and tetraalkyl ammonium salts (each alkyl group having 1 to 18 carbon atoms) (e.g., tetraethylammonium bromide, tetrabutylammonium bromide, tetraalkylammonium carboxylates (carboxylic acid having 1 to 12 carbon atoms)). The curing accelerator (E) of the third embodiment more preferably contains an organic acid salt of diazabicycloundecene, from the viewpoint of being able to improve the curability of the two-component liquid resin composition.

[0221] The imidazoles preferably include one or more selected from the group consisting of 1-benzyl-2-methylimidazole, 2-ethyl-4-methylimidazole, 2-undecylimidazole, 1,2-dimethylimidazole and 1-benzyl-2-phenylimidazole.

[0222] The organic phosphine preferably includes one or more selected from the group consisting of triphenylphosphine, triphenylphosphine-triphenylborate, tris(p-methoxyphenyl)phosphine, and tetraphenylphosphonium tetraphenylborate.

[0223] The Lewis acid catalyst preferably includes one or more selected from the group consisting of boron trifluoride amine complex, boron trichloride amine complex, and boron trifluoride ethylamine complex.

[0224] The content of the curing accelerator (E) in the two-component liquid resin composition of the third embodiment is, when the entire two-component liquid resin composition is taken as 100% by mass, 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, and even more preferably 0.20% by mass or more, from the viewpoint of being able to improve the curability of the two-component liquid resin composition; and from the viewpoint of being able to further improve the performance balance between the storage stability and fluidity of the two-component liquid resin composition, 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. From the viewpoint of improving the curability, storage stability, and flowability of the two-component liquid resin composition, 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, when the total amount of the two-component liquid resin composition is taken as 100% by mass.

[0225] (Other Components) The two-component liquid resin composition of the third embodiment may contain, as necessary, a coupling agent, a colorant such as carbon black, an antifoaming agent such as a silicone antifoaming agent, a flame retardant, and the like.

[0226] From the viewpoint of being able to improve the interfacial strength between the epoxy resin (A) and the inorganic filler (C), the coupling agent of the third embodiment preferably contains one or more selected from the group consisting of an epoxy silane coupling agent, an amino silane coupling agent, a ureido silane coupling agent, and a mercapto silane coupling agent, and more preferably contains an epoxy silane coupling agent.

[0227] The epoxy silane coupling agent preferably includes one or more selected from the group consisting of γ-glycidoxypropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldimethoxysilane, and β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, and more preferably includes γ-glycidoxypropyltrimethoxysilane. The aminosilane coupling agent preferably includes one or more selected from the group consisting of 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-(trimethoxysilylpropyl)-1,3-benzenedimethanane. The ureidosilane coupling agent preferably includes one or more selected from the group consisting of γ-ureidopropyltriethoxysilane and hexamethyldisilazane.

[0228] From the viewpoint of improving the interfacial strength between the epoxy resin (A) and the inorganic filler (C), the content of the coupling agent in the two-component liquid resin composition of the third embodiment is, when the entire two-component liquid resin composition is taken as 100% by mass, 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 is 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, even more preferably 0.20% by mass or less. From the viewpoint of improving the interfacial strength between the epoxy resin (A) and the inorganic filler (C), the content of the 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, when the entire two-component liquid resin composition is taken as 100% by mass.

[0229] The colorant of the third embodiment preferably contains one or more selected from the group consisting of carbon black, titanium oxide, barium sulfate, iron black, red iron oxide, aniline black, and alizanin, and more preferably contains carbon black.

[0230] The content of the colorant in the two-component liquid resin composition of the third embodiment is, when the entire two-component liquid resin composition is taken as 100% by mass, 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 is 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, even more preferably 0.10% by mass or less. Furthermore, the content of the colorant in the two-component liquid resin composition, when the entire two-component liquid resin composition is taken as 100% by mass, 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.

[0231] The defoaming agent of the third embodiment preferably includes one or more selected from the group consisting of a silicone-based defoaming agent, a fluorine-based defoaming agent, and a polymer-based defoaming agent, and more preferably includes a silicone-based defoaming agent.

[0232] The content of the defoaming agent in the two-component liquid resin composition of the third embodiment is, when the total weight of the two-component liquid resin composition is taken as 100% by weight, preferably 0.01% by weight or more, more preferably 0.03% by weight or more, even more preferably 0.05% by weight or more, even more preferably 0.08% by weight or more, and preferably 1.00% by weight or less, more preferably 0.80% by weight or less, even more preferably 0.60% by weight or less, even more preferably 0.40% by weight or less, even more preferably 0.20% by weight or less. The content of the defoaming agent in the two-component liquid resin composition is, when the total weight of the two-component liquid resin composition is taken as 100% by weight, preferably 0.01% by weight or more and 1.00% by weight or less, more preferably 0.01% by weight or more and 0.80% by weight or less, even more preferably 0.03% by weight or more and 0.60% by weight or less, even more preferably 0.05% by weight or more and 0.40% by weight or less, even more preferably 0.08% by weight or more and 0.20% by weight or less.

[0233] From the viewpoint of further improving 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 the group consisting of aluminum hydroxide, magnesium hydroxide, zinc borate, zinc molybdate, antimony trioxide, antimony pentoxide, phosphazene, brominated epoxy resin, and brominated polycarbonate.

[0234] 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, and more preferably 5.0% by mass or more and 30% by mass or less, when the entire two-component liquid resin composition is taken as 100% by mass, from the viewpoint of further improving the flame retardancy of the cured product of the two-component liquid resin composition.

[0235] (Method for producing two-component liquid resin composition) A method for producing a two-component liquid resin composition of the third embodiment will be described in detail. The two-component liquid resin composition of the third embodiment can be produced by thoroughly mixing and stirring, by a known method, the epoxy resin (A), inorganic filler (C), anti-settling agent (D), and other components as the first component, and the acid anhydride (B), inorganic filler (C), anti-settling agent (D), and other components as the second component, among the above-mentioned components. When the two-component liquid resin composition of the third embodiment contains the curing accelerator (E), the second component preferably contains the curing accelerator (E).

[0236] Methods for mixing and stirring the components to obtain the first or second liquid in the two-component liquid resin composition of the third embodiment include methods using a mixer or other mixing machine, or a kneader such as a roll or kneader.

[0237] The two-component liquid resin composition of the third embodiment is used in the form of a mixed liquid obtained by mixing the first and second liquids. Examples of a method for mixing the first and second liquids include a method using a mixer or other mixer, or a kneader or other kneading machine.

[0238] In the two-component liquid resin composition of the third embodiment, the content of the second liquid when the first and second liquids are further mixed 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, and preferably 150 parts by mass or less, more preferably 130 parts by mass or less, and even more preferably 110 parts by mass or less, per 100 parts by mass of the first liquid, from the viewpoint of further improving the performance balance of the two-component liquid resin composition, the flowability, the heat resistance upon curing, and the mechanical properties. Furthermore, the content of the second liquid when the first and second liquids are further mixed 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 less, per 100 parts by mass of the first liquid, from the viewpoint of further improving the performance balance of the two-component liquid resin composition, the flowability, the heat resistance upon curing, and the mechanical properties.

[0239] <Explanation common to the first to third embodiments> (Use of two-component liquid resin composition) The two-component liquid resin composition of the present embodiment can be used to encapsulate, by a casting method, a power module that preferably includes a power module substrate including a circuit layer and a power semiconductor element on the circuit layer of the power module substrate.

[0240] [Power Module] The power module of the present embodiment includes a power module substrate including a circuit layer, a power semiconductor element on the circuit layer of the power module substrate, and an encapsulant for encapsulating the power module substrate and the power semiconductor element, wherein the encapsulant includes a cured product of the two-component liquid resin composition of the present embodiment described above.

[0241] The power module of this embodiment may be a small to medium-sized power module for home appliances, computers, etc., or a large-sized power module for controlling automobiles, railway vehicles, substations, etc. The power module of this embodiment is preferably one or more types selected from the group consisting of a rectifier, a frequency converter, a regulator, and an inverter.

[0242] The power semiconductor element in the power module of this embodiment preferably includes one or more types selected from the group consisting of a rectifier diode, a power transistor, a MOS transistor, an insulated gate bipolar transistor (IGBT), a thyristor, a gate turn-off thyristor (GTO), and a triac, and more preferably includes one or more types selected from the group consisting of a MOS transistor and an insulated gate bipolar transistor (IGBT).

[0243] The power module of this embodiment can be obtained by casting the two-component liquid resin composition of this embodiment described above onto a power semiconductor element mounted on a power module substrate on which a circuit layer has been formed, so as to cover the substrate and the power semiconductor element, and then heating and curing the two-component liquid resin composition. It is preferable to vacuum degas the two-component liquid resin composition during casting and / or before and after casting. Vacuum degassing removes air and other substances contained in the two-component liquid resin composition, thereby obtaining a power module with few voids in the cured product of the two-component liquid resin composition. 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.

[0244] The heating temperature of the power module of 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 the manufacturing efficiency of the power module, and is preferably 220°C or lower, more preferably 210°C or lower, and even more preferably 200°C or lower, from the viewpoint of improving the performance balance between the reliability and mechanical strength of the power module.

[0245] The heating time of the power module of 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 improving the performance balance between the reliability and mechanical strength of the power module, and is preferably 10 hours or less, more preferably 5 hours or less, and even more preferably 3 hours or less, from the viewpoint of the manufacturing efficiency of the power module.

[0246] Although the embodiments of the present invention have been described above, these are merely examples of the present invention, and various other configurations may be adopted. Furthermore, the present invention is not limited to the above-described embodiments, and modifications and improvements within the scope of achieving the object of the present invention are included in the present invention.

[0247] The present invention will be described in more detail below with reference to examples, but the present invention is not limited thereto in any way. Examples and comparative examples related to the first embodiment of the present invention are Examples 1a to 5a and Comparative Examples 1a to 4a, Examples and comparative examples related to the second embodiment of the present invention are Examples 1b to 3b and Comparative Examples 1b to 4b, and Examples and comparative examples related to the third embodiment of the present invention are Examples 1c to 3c and Comparative Examples 1c to 2c.

[0248] <Examples and Comparative Examples Related to the First Embodiment> The components shown in "First Liquid" in Table 1 were mixed in the amounts (parts by mass) shown in Table 1 to obtain a first liquid (main component). Separately, the components shown in "Second Liquid" in Table 1 were mixed in the amounts (parts by mass) shown in Table 1 to obtain a second liquid (curing agent). Thereafter, the first liquid and the second liquid were mixed in the ratio shown in Table 1 as "blending ratio (First Liquid / Second Liquid)" to produce a mixed liquid (liquid resin composition). Details of each component in Table 1 are as follows:

[0249] <Epoxy resin (A)> Epoxy resin 1a: 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexanecarboxylate (alicyclic epoxy resin, manufactured by Daicel Corporation, CELLOXIDE 2021P) Epoxy resin 2a: bisphenol A type epoxy resin (manufactured by Mitsubishi Chemical Corporation, jER828EL) Epoxy resin 3a: bisphenol F type epoxy resin (manufactured by Mitsubishi Chemical Corporation, jER807) Epoxy resin 4a: aminophenol type epoxy resin (manufactured by Mitsubishi Chemical Corporation, JER630) <Acid anhydride (B)> Acid anhydride 1a: methyl nadic anhydride (manufactured by Showa Denko Materials, MHAC-P) <Curing accelerator (E)> Curing accelerator 1a: DBU-octylate salt (manufactured by San-Apro Co., Ltd., U-CAT SA102) <Inorganic filler (C)> Inorganic filler 1a: spherical fused silica (manufactured by Denka Co., Ltd., FB-950, average particle diameter D ５０ : 23 μm) <Anti-settling agents (D)> Anti-settling agent 1a: Organized bentonite (manufactured by Hojun Co., Ltd., Esben NTO) Anti-settling agent 2a: Organized bentonite (manufactured by ELEMENTIS, Benton SD-2) Anti-settling agent 3a: Organized bentonite (manufactured by Hojun Co., Ltd., Esben N400) Anti-settling agent 4a: Organized bentonite (manufactured by Hojun Co., Ltd., Esben NZ) Anti-settling agent 5a: Nanosilica (manufactured by Tokuyama Corporation, Reolosil QS20, average particle size D ５０ : 12 nm)

[0250] <Other ingredients> Colorant: Carbon black (Mitsubishi Chemical Corporation, Carbon #5) Coupling agent: Epoxy silane coupling agent (Momentive Performance Materials, A-187) Defoamer: Silicone-based defoamer (Nichisyo Sangyo Co., Ltd., TSA750)

[0251] The average particle diameter D of the inorganic filler and the anti-settling agent ５０ The value was measured at an integrated value of 50% of the volume-based particle size distribution by a laser diffraction scattering measurement method using a laser diffraction particle size distribution analyzer (SALD-7000, manufactured by Shimadzu Corporation).

[0252] <Evaluation of Physical Properties> The first liquid, second liquid and mixed liquid obtained in each example and comparative example were measured for the following physical properties.

[0253] (Viscosity and Thixotropy at 25°C) The first liquid obtained in each example and comparative example was measured for viscosity η at 25°C using an E-type viscometer and a 3°×R14 cone rotor (rotor No. 4) at a rotation speed of 5 rpm. ５Ａ At this time, the viscosity η ５Ａ The viscosity measured 1 minute after the start of rotation of the cone rotor set in the E-type viscometer was used as the measurement result. Next, the viscosity η of the first liquid was measured in the same manner as above, except that the rotation speed was changed to 10 rpm. １０Ａ Furthermore, the thixotropy of the first liquid was calculated using the above measurement results according to the following formula: (thixotropy of first liquid) = (viscosity η ５Ａ ) / (viscosity η １０Ａ Similarly, the viscosity η of the second liquid and the mixed liquid at a rotation speed of 5 rpm and a temperature of 25° C. was measured in the same manner as above. ５Ｂ and η ５Ｐ , viscosity η at a rotation speed of 10 rpm and a temperature of 25°C １０Ｂ and η １０Ｐ The viscosity and thixotropy were measured. The measurement results are shown in Table 1. Note that the entry "measurable" in Table 1 indicates that the viscosity of the first liquid, second liquid, and mixed liquid obtained in each Example and Comparative Example was so high that the measurement torque exceeded 100%, making it impossible to obtain an accurate measurement value.

[0254] (Flowability) 0.05 ml of the mixed liquid was applied to a glass plate so that the diameter of the mixed liquid was 1 cm or less. The glass plate was then held at a tilt angle of 45° and a temperature of 60°C for 3 minutes. The distance the mixed liquid flowed during this time was measured as the flow distance (mm) and evaluated according to the following criteria. The evaluation results are shown in Table 1. A: The flow distance was 30 mm or more. B: The flow distance was 15 mm or more but less than 30 mm. C: The flow distance was less than 15 mm.

[0255] (Storage Stability) The storage stability of the first and second liquids was evaluated by the following method. First, the first liquid was poured into a 120 mL plastic container with a lid to a height of 50 to 55 mm, and the container was closed. After 240 hours at 60°C, the height of the filler sediment (hard cake) that had accumulated at the bottom was measured and evaluated according to the following criteria. A: The height of the hard cake was 0 mm. B: The height of the hard cake was more than 0 mm and less than 3 mm. C: The height of the hard cake was 3 mm or more. The storage stability of the second liquid was also evaluated in the same manner as for the first liquid. The evaluation results are shown in Table 1.

[0256] (Casting Workability) The casting workability of the mixed liquid was evaluated according to the following criteria. A: All of the following (Requirement 1) to (Requirement 3) are met. B: Any two of the following (Requirement 1) to (Requirement 3) are met. C: Any one of the following (Requirement 1) to (Requirement 3) are met, or none are met. Requirement 1: Viscosity η of the mixed liquid at 25°C ５Ｐ and viscosity η １０Ｐ Requirement 2: The fluidity of the mixed liquid is evaluated as "A." Requirement 3: The storage stability of both the first and second liquids is evaluated as "A."

[0257]

[0258] In the two-component liquid resin composition of the example related to the first embodiment, the first component contains an epoxy resin (A), an inorganic filler (C), and an anti-settling agent (D), the second component contains an acid anhydride (B), an inorganic filler (C), and an anti-settling agent (D), and the anti-settling agent (D) contains an inorganic thickener, and the viscosity of the first component is η ５Ａ When the viscosity is 1.0 Pa·s or more and 50.0 Pa·s or less, the balance of storage stability and fluidity is improved.

[0259] <Examples and Comparative Examples Related to the Second Embodiment> The components shown in "First Liquid" in Table 2 were mixed in the amounts (parts by mass) shown in Table 2 to obtain a first liquid (main component). Separately, the components shown in "Second Liquid" in Table 2 were mixed in the amounts (parts by mass) shown in Table 2 to obtain a second liquid (curing agent). Thereafter, the first liquid and the second liquid were mixed in the ratio shown in Table 2 as "blending ratio (First Liquid / Second Liquid)" to produce a mixed liquid (liquid resin composition). Details of each component in Table 2 are as follows:

[0260] <Epoxy resin (A)> Epoxy resin 1b: 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexanecarboxylate (alicyclic epoxy resin, manufactured by Daicel Corporation, CELLOXIDE 2021P) Epoxy resin 2b: bisphenol A type epoxy resin (manufactured by Mitsubishi Chemical Corporation, jER828EL) Epoxy resin 3b: bisphenol F type epoxy resin (manufactured by Mitsubishi Chemical Corporation, jER807) Epoxy resin 4b: aminophenol type epoxy resin (manufactured by Mitsubishi Chemical Corporation, JER630) <Acid anhydride (B)> Acid anhydride 1b: methyl nadic anhydride (manufactured by Showa Denko Materials, MHAC-P) <Curing accelerator (E)> Curing accelerator 1b: DBU-octylate salt (manufactured by San-Apro Co., Ltd., U-CAT SA102) <Inorganic filler (C)> Inorganic filler 1b: spherical fused silica (manufactured by Denka Co., Ltd., FB-950, average particle diameter D ５０ : 23 μm) <Anti-settling agents (D)> Anti-settling agent 1b: polyhydroxycarboxylic acid ester (BYK-R606, manufactured by BYK Japan) Anti-settling agent 2b: acidic phosphate ester (BYK-W9010, manufactured by BYK Japan) Anti-settling agent 3b: modified carboxyl group-containing polymer (Florene G700, manufactured by Kyoeisha Chemical Co., Ltd.) Anti-settling agent 4b: organic bentonite (Esben NTO, manufactured by Hojun Co., Ltd.)

[0261] <Other ingredients> Colorant: Carbon black (Mitsubishi Chemical Corporation, Carbon #5) Coupling agent: Epoxy silane coupling agent (Momentive Performance Materials, A-187) Defoamer: Silicone-based defoamer (Nichisyo Sangyo Co., Ltd., TSA750)

[0262] The average particle diameter D of the inorganic filler５０ The value was measured at an integrated value of 50% of the volume-based particle size distribution by a laser diffraction scattering measurement method using a laser diffraction particle size distribution analyzer (SALD-7000, manufactured by Shimadzu Corporation).

[0263] <Evaluation of Physical Properties> The first liquid, second liquid and mixed liquid obtained in each example and comparative example were measured for the following physical properties.

[0264] (Viscosity and Thixotropy at 25°C) The first liquid obtained in each example and comparative example was measured for viscosity η at 25°C using an E-type viscometer and a 3°×R14 cone rotor (rotor No. 4) at a rotation speed of 5 rpm. ５Ａ At this time, the viscosity η ５Ａ The viscosity measured 1 minute after the start of rotation of the cone rotor set in the E-type viscometer was used as the measurement result. Next, the viscosity η of the first liquid was measured in the same manner as above, except that the rotation speed was changed to 10 rpm. １０Ａ Furthermore, the thixotropy of the first liquid was calculated using the above measurement results according to the following formula: (thixotropy of first liquid) = (viscosity η ５Ａ ) / (viscosity η １０Ａ Similarly, the viscosity η of the second liquid and the mixed liquid at a rotation speed of 5 rpm and a temperature of 25° C. was measured in the same manner as above. ５Ｂ and η ５Ｐ , viscosity η at a rotation speed of 10 rpm and a temperature of 25°C １０Ｂ and η １０Ｐ The viscosity and thixotropy were measured. The measurement results are shown in Table 2. Note that the entry "measurable" in Table 2 indicates that the viscosity of the first liquid, second liquid, and mixed liquid obtained in each Example and Comparative Example was so high that the measurement torque exceeded 100%, making it impossible to obtain an accurate measurement value.

[0265] (Flowability) 0.05 ml of the mixed liquid was applied to a glass plate so that the diameter of the mixed liquid was 1 cm or less. The glass plate was then held at a tilt angle of 45° and a temperature of 60°C for 3 minutes. The distance the mixed liquid flowed during this time was measured as the flow distance (mm) and evaluated according to the following criteria. The evaluation results are shown in Table 2. A: The flow distance was 30 mm or more. B: The flow distance was 15 mm or more but less than 30 mm. C: The flow distance was less than 15 mm.

[0266] (Storage Stability) The storage stability of the first and second liquids was evaluated by the following method. First, the first liquid was poured into a 120 mL plastic container with a lid to a height of 50 to 55 mm, and the lid was placed on it. After 240 hours at 60°C, the height of the filler sediment (hard cake) that had accumulated at the bottom was measured and evaluated according to the following criteria. A: The height of the hard cake was 0 mm. B: The height of the hard cake was more than 0 mm and less than 3 mm. C: The height of the hard cake was 3 mm or more. The storage stability of the second liquid was also evaluated in the same manner as for the first liquid. The evaluation results are shown in Table 2.

[0267] (Casting Workability) The casting workability of the mixed liquid was evaluated according to the following criteria. A: All of the following (Requirement 1) to (Requirement 3) are met. B: Any two of the following (Requirement 1) to (Requirement 3) are met. C: Any one of the following (Requirement 1) to (Requirement 3) are met, or none are met. Requirement 1: Viscosity η of the mixed liquid at 25°C ５Ｐ and viscosity η １０Ｐ Requirement 2: The fluidity of the mixed liquid is evaluated as "A." Requirement 3: The storage stability of both the first and second liquids is evaluated as "A."

[0268]

[0269] In the two-component liquid resin composition of the example related to the second embodiment, the first component contains an epoxy resin (A), an inorganic filler (C), and an anti-settling agent (D), the second component contains an acid anhydride (B), an inorganic filler (C), and an anti-settling agent (D), and the anti-settling agent (D) contains a dispersant, and the viscosity of the first component is η ５ＡWhen the viscosity is 1.0 Pa·s or more and 50.0 Pa·s or less, the balance of storage stability and fluidity is improved.

[0270] <Examples and Comparative Examples Related to the Third Embodiment> The components shown in "First Liquid" in Table 3 were mixed in the amounts (parts by mass) shown in Table 3 to obtain a first liquid (main component). Separately, the components shown in "Second Liquid" in Table 3 were mixed in the amounts (parts by mass) shown in Table 3 to obtain a second liquid (curing agent). Then, the first liquid and the second liquid were mixed in the ratio shown in Table 3 as "blending ratio (First Liquid / Second Liquid)" to produce a mixed liquid (liquid resin composition). Details of each component in Table 3 are as follows:

[0271] <Epoxy resin (A)> Epoxy resin 1c: alicyclic epoxy resin (manufactured by Daicel Corporation, CELLOXIDE 2021P) Epoxy resin 2c: bisphenol A type epoxy resin (manufactured by Mitsubishi Chemical Corporation, jER828EL) Epoxy resin 3c: bisphenol F type epoxy resin (manufactured by Mitsubishi Chemical Corporation, jER807) <Acid anhydride (B)> Acid anhydride 1c: methyl nadic anhydride (manufactured by Showa Denko Materials, MHAC-P) <Curing accelerator (E)> Curing accelerator 1c: DBU-octylate salt (manufactured by San-Apro, U-CAT SA102) <Inorganic filler (C)> Inorganic filler 1c: spherical fused silica (manufactured by Denka Company, FB-950, average particle diameter D ５０ : 23 μm) <Anti-settling agent (D)> Anti-settling agent 1c: Organized bentonite (manufactured by Hojun Co., Ltd., Esben NTO)

[0272] <Other ingredients> Colorant: Carbon black (Mitsubishi Chemical Corporation, Carbon #5) Coupling agent: Epoxy silane coupling agent (Momentive Performance Materials, A-187) Defoamer: Silicone-based defoamer (Nichisyo Sangyo Co., Ltd., TSA750)

[0273] The average particle diameter D of the inorganic filler ５０ The value was measured at an integrated value of 50% of the volume-based particle size distribution by a laser diffraction scattering measurement method using a laser diffraction particle size distribution analyzer (SALD-7000, manufactured by Shimadzu Corporation).

[0274] <Evaluation of Physical Properties> The following physical properties were measured for the first liquid, second liquid and mixed liquid obtained in each of the Examples and Comparative Examples.

[0275] (Viscosity and Thixotropy) The first liquid obtained in each Example and Comparative Example was measured for viscosity η at a rotation speed of 5 rpm and a temperature of 60°C using an E-type viscometer and a 3°×R14 cone rotor (rotor No. 4). ５Ａ At this time, the viscosity η ５Ａ The viscosity measured 1 minute after the start of rotation of the cone rotor set in the E-type viscometer was used as the measurement result. Next, the viscosity η of the first liquid was measured in the same manner as above, except that the rotation speed was changed to 10 rpm. １０Ａ Furthermore, the thixotropy of the first liquid was calculated using the above measurement results according to the following formula: (thixotropy of first liquid) = (viscosity η ５Ａ ) / (viscosity η １０Ａ Next, the viscosity η of the second liquid obtained in each example and comparative example was measured using an E-type viscometer and a 3°×R14 cone rotor (rotor No. 4) at a rotation speed of 5 rpm and a temperature of 25° C. ５Ｂ At this time, the viscosity η ５Ｂ The viscosity measured 1 minute after the start of rotation of the cone rotor set in the E-type viscometer was used as the measurement result. Next, the viscosity η of the second liquid was measured in the same manner as above, except that the rotation speed was changed to 10 rpm. １０Ｂ Furthermore, the thixotropy of the second liquid was calculated using the above measurement results according to the following formula: (thixotropy of second liquid) = (viscosity η ５Ｂ ) / (viscosity η １０Ｂ Furthermore, the viscosity η of the mixture of the first and second liquids was measured at a rotation speed of 5 rpm under the same conditions as the measurement method used for the first liquid. ５Ｐ , viscosity η at a rotation speed of 10 rpm １０Ｐ The viscosity and thixotropy were measured and calculated. The measurement results are shown in Table 3. Note that the entry "measurable" in Table 3 indicates that the viscosity of the first and second liquids obtained was so high that the measurement torque exceeded 100%, making it impossible to obtain accurate measurements.

[0276] (Flowability) 0.05 ml of the mixed liquid was applied to a glass plate so that the diameter of the mixed liquid was 1 cm or less. The glass plate was then held at a temperature of 60°C at an inclination angle of 45° for 3 minutes. The distance the mixed liquid flowed during this time was measured as the flow distance (mm) and evaluated according to the following criteria. The evaluation results are shown in Table 3. A: The flow distance was 30 mm or more. B: The flow distance was 15 mm or more but less than 30 mm. C: The flow distance was less than 15 mm.

[0277] (Storage Stability) The storage stability of the first and second liquids was evaluated by the following method. First, the first liquid was poured into a 120 mL plastic container with a lid to a height of 50 to 55 mm, and the lid was placed on it. After 240 hours at 60°C, the height of the filler sediment (hard cake) that had accumulated at the bottom was measured and evaluated according to the following criteria. A: The height of the hard cake was 0 mm. B: The height of the hard cake was more than 0 mm and less than 3 mm. C: The height of the hard cake was 3 mm or more. The storage stability of the second liquid was also evaluated in the same manner as for the first liquid. The evaluation results are shown in Table 3.

[0278] (Casting Workability) The casting workability of the mixed liquid was evaluated according to the following criteria. A: Meets all of the following (Requirement 1) to (Requirement 3). B: Meets any two of the following (Requirement 1) to (Requirement 3). C: Meets any one of the following (Requirement 1) to (Requirement 3), or none of them. Requirement 1: Viscosity η of the mixed liquid at 60°C ５Ｐ and viscosity η １０Ｐ Requirement 2: The fluidity of the mixed liquid is evaluated as "A" or "B." Requirement 3: The storage stability of both the first and second liquids is evaluated as "A."

[0279]

[0280] In the two-component liquid resin composition of the example, the first component contains an epoxy resin (A), an inorganic filler (C), and an anti-settling agent (D), the second component contains an acid anhydride (B), an inorganic filler (C), and an anti-settling agent (D), and the viscosity of the first component η ５ＡWhen the viscosity is 1.0 Pa·s or more and 15.0 Pa·s or less, the balance of storage stability and fluidity is improved.

[0281] This application claims priority based on Japanese Patent Application Nos. 2023-202588, 2023-202589, and 2023-202591, filed on November 30, 2023, the disclosures of which are incorporated herein in their entireties.

Claims

1. A two-component liquid resin composition comprising a first liquid and a second liquid, wherein the first liquid contains an epoxy resin (A), an inorganic filler (C) and an anti-settling agent (D), the second liquid contains an acid anhydride (B), an inorganic filler (C) and an anti-settling agent (D), and the anti-settling agent (D) contains an inorganic thickener (excluding the inorganic filler (C)), and the viscosity η of the first liquid is measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 25° C. ５Ａ The two-component liquid resin composition has a viscosity of 1.0 Pa·s or more and 50.0 Pa·s or less.

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

3. The viscosity η １０Ａ The viscosity η ５Ａ Viscosity ratio Ti Ａ (η ５Ａ / １０Ａ 3. The two-component liquid resin composition according to claim 2, wherein the ratio of the molecular weight of the polymer to the molecular weight of the two-component liquid resin composition is 0.1 or more and 1.5 or less.

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

5. The viscosity η of the second liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. １０Ｂ The two-component liquid resin composition according to claim 4, wherein the viscosity is 1.0 Pa·s or more and 50.0 Pa·s or less.

6. The viscosity η １０Ｂ The viscosity η ５Ｂ Viscosity ratio Ti Ｂ (η ５Ｂ / １０Ｂ 6. The two-component liquid resin composition according to claim 5, wherein the ratio of the molecular weight of the polymer to the molecular weight of the two-component liquid resin composition is 0.5 or more and 2.5 or less.

7. The viscosity η of the mixture of the first liquid and the second liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 25° C. ５Ｐ The two-component liquid resin composition according to any one of claims 1 to 6, wherein the viscosity is 1.0 Pa·s or more and 50.0 Pa·s or less.

8. The viscosity η of the mixture of the first liquid and the second liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. １０Ｐ The two-component liquid resin composition according to claim 7, wherein the viscosity is 10.0 Pa·s or more and 50.0 Pa·s or less.

9. Said viscosity η １０Ｐ The viscosity η ５Ｐ Viscosity ratio Ti Ｐ (η ５Ｐ / １０Ｐ 9. The two-component liquid resin composition according to claim 8, wherein the ratio of the viscosity to the viscosity of the liquid resin composition is 0.5 or more and 2.0 or less.

10. A two-component liquid resin composition according to any one of claims 1 to 9, wherein the inorganic thickener comprises one or more selected from the group consisting of layered inorganic minerals and nanosilica.

11. The two-component liquid resin composition according to claim 10, wherein the layered inorganic mineral comprises one or more members selected from the group consisting of clay and talc.

12. A two-component liquid resin composition according to any one of claims 1 to 11, wherein the content of the anti-settling agent (D) is 0.01% by mass or more and 2.00% by mass or less, when the entire two-component liquid resin composition is taken as 100% by mass.

13. The two-component liquid resin composition according to any one of claims 1 to 12, wherein the epoxy resin (A) comprises an alicyclic epoxy resin.

14. The two-component liquid resin composition according to claim 13, wherein the content of the alicyclic epoxy resin is 50 parts by mass or more and 100 parts by mass or less when the content of the epoxy resin (A) is 100 parts by mass.

15. A two-component liquid resin composition according to any one of claims 1 to 14, wherein the content of the epoxy resin (A) is 5% by mass or more and 30% by mass or less, when the entire two-component liquid resin composition is taken as 100% by mass.

16. The two-component liquid resin composition according to any one of claims 1 to 15, wherein the acid anhydride (B) comprises one or more selected from the group consisting of methyl-5-norbornene-2,3-dicarboxylic anhydride, methylcyclohexane-1,2-dicarboxylic anhydride, and methyltetrahydrophthalic anhydride.

17. A two-component liquid resin composition according to any one of claims 1 to 16, wherein the content of the acid anhydride (B) is 5% by mass or more and 20% by mass or less, when the entire two-component liquid resin composition is taken as 100% by mass.

18. A two-component liquid resin composition according to any one of claims 1 to 17, wherein the inorganic filler (C) comprises one or more members selected from the group consisting of silica, alumina, aluminum hydroxide and calcium carbonate.

19. The average particle diameter D of the inorganic filler (C) at a cumulative value of 50% in the volume frequency particle size distribution measured by a laser diffraction scattering method ５０ The two-component liquid resin composition according to any one of claims 1 to 18, wherein the average particle diameter is 0.5 μm or more and 100.0 μm or less.

20. A two-component liquid resin composition according to any one of claims 1 to 19, wherein the content of the inorganic filler (C) is 65% by mass or more and 85% by mass or less, when the entire two-component liquid resin composition is taken as 100% by mass.

21. The two-component liquid resin composition according to any one of claims 1 to 20, further comprising a curing accelerator (E).

22. The two-component liquid resin composition according to claim 21, wherein the curing accelerator (E) comprises one or more compounds selected from the group consisting of tertiary amines, quaternary ammonium salts, imidazoles, organic phosphines and Lewis acid catalysts.

23. A two-component liquid resin composition according to claim 21 or 22, wherein the content of the curing accelerator (E) is 0.01% by mass or more and 1.00% by mass or less when the entire two-component liquid resin composition is taken as 100% by mass.

24. A two-liquid type liquid resin composition comprising a first liquid and a second liquid, wherein the first liquid contains an epoxy resin (A), an inorganic filler (C) and an anti-settling agent (D), the second liquid contains an acid anhydride (B), an inorganic filler (C) and an anti-settling agent (D), and the anti-settling agent (D) contains a dispersant, and the viscosity η of the first liquid is measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 25° C. ５Ａ The two-component liquid resin composition has a viscosity of 1.0 Pa·s or more and 50.0 Pa·s or less.

25. The viscosity η of the first liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. １０Ａ The two-component liquid resin composition according to claim 24, wherein the viscosity is 1.0 Pa·s or more and 50.0 Pa·s or less.

26. Said viscosity η １０Ａ The viscosity η ５Ａ Viscosity ratio Ti Ａ (η ５Ａ / １０Ａ 26. The two-component liquid resin composition according to claim 25, wherein the ratio of the saturation angle to the saturation angle is 0.4 or more and 1.5 or less.

27. The viscosity η of the second liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 25° C. ５Ｂ The two-component liquid resin composition according to any one of claims 24 to 26, wherein the viscosity is 1.0 Pa·s or more and 70.0 Pa·s or less.

28. The viscosity η of the second liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. １０Ｂ The two-component liquid resin composition according to claim 27, wherein the viscosity is 1.0 Pa·s or more and 50.0 Pa·s or less.

29. Said viscosity η １０Ｂ The viscosity η ５Ｂ Viscosity ratio Ti Ｂ (η ５Ｂ / １０Ｂ 29. The two-component liquid resin composition according to claim 28, wherein the value of (a) is 0.5 or more and 4.0 or less.

30. The viscosity η of the mixture of the first liquid and the second liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 25° C. ５Ｐ The two-component liquid resin composition according to any one of claims 24 to 29, wherein the viscosity is 1.0 Pa·s or more and 50.0 Pa·s or less.

31. The viscosity η of the mixture of the first liquid and the second liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. １０Ｐ The two-component liquid resin composition according to claim 30, wherein the viscosity is 10.0 Pa·s or more and 50.0 Pa·s or less.

32. Said viscosity η １０Ｐ The viscosity η ５Ｐ Viscosity ratio Ti Ｐ (η ５Ｐ / １０Ｐ 32. The two-component liquid resin composition according to claim 31, wherein the ratio of the saturation angle to the saturation angle is 0.5 or more and 2.0 or less.

33. The two-component liquid resin composition according to any one of claims 24 to 32, wherein the dispersant comprises an ester compound containing a long-chain hydrocarbon group.

34. The two-component liquid resin composition according to claim 33, wherein the ester compound containing a long-chain hydrocarbon group comprises one or more compounds selected from the group consisting of polyhydroxycarboxylic acid esters, acidic phosphoric acid esters and carboxyl group-containing modified polymers.

35. A two-component liquid resin composition according to any one of claims 24 to 34, wherein the content of the anti-settling agent (D) is 0.01% by mass or more and 2.0% by mass or less, when the entire two-component liquid resin composition is taken as 100% by mass.

36. The two-component liquid resin composition according to any one of claims 24 to 35, wherein the epoxy resin (A) comprises an alicyclic epoxy resin.

37. The two-component liquid resin composition according to claim 36, wherein the content of the alicyclic epoxy resin is 50 parts by mass or more and 100 parts by mass or less when the content of the epoxy resin (A) is 100 parts by mass.

38. A two-component liquid resin composition according to any one of claims 24 to 37, wherein the content of the epoxy resin (A) is 5% by mass or more and 30% by mass or less, when the entire two-component liquid resin composition is taken as 100% by mass.

39. The two-component liquid resin composition according to any one of claims 24 to 38, wherein the acid anhydride (B) comprises one or more selected from the group consisting of methyl-5-norbornene-2,3-dicarboxylic anhydride, methylcyclohexane-1,2-dicarboxylic anhydride, and methyltetrahydrophthalic anhydride.

40. A two-component liquid resin composition according to any one of claims 24 to 39, wherein the content of the acid anhydride (B) is 5% by mass or more and 20% by mass or less, when the entire two-component liquid resin composition is taken as 100% by mass.

41. The two-component liquid resin composition according to any one of claims 24 to 40, wherein the inorganic filler (C) comprises one or more members selected from the group consisting of silica, alumina, aluminum hydroxide, and calcium carbonate.

42. The average particle diameter D of the inorganic filler (C) at a cumulative value of 50% in the volume frequency particle size distribution measured by a laser diffraction scattering method ５０ The two-component liquid resin composition according to any one of claims 24 to 41, wherein the average particle diameter is 0.5 μm or more and 100 μm or less.

43. A two-component liquid resin composition according to any one of claims 24 to 42, wherein the content of the inorganic filler (C) is 65% by mass or more and 85% by mass or less, when the entire two-component liquid resin composition is taken as 100% by mass.

44. The two-component liquid resin composition according to any one of claims 24 to 43, further comprising a curing accelerator (E).

45. The two-component liquid resin composition according to claim 44, wherein the curing accelerator (E) comprises one or more selected from the group consisting of tertiary amines, quaternary ammonium salts, imidazoles, organic phosphines and Lewis acid catalysts.

46. ​​A two-component liquid resin composition according to claim 44 or 45, wherein the content of the curing accelerator (E) is 0.01% by mass or more and 1.00% by mass or less when the entire two-component liquid resin composition is taken as 100% by mass.

47. A two-liquid type liquid resin composition comprising a first liquid and a second liquid, the first liquid containing an epoxy resin (A), an inorganic filler (C) and an anti-settling agent (D), and the second liquid containing an acid anhydride (B), an inorganic filler (C) and an anti-settling agent (D), wherein the viscosity η of the first liquid is measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 60° C. ５Ａ The two-component liquid resin composition has a viscosity of 1.0 Pa·s or more and 15.0 Pa·s or less.

48. The viscosity η of the first liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 60° C. １０Ａ The two-component liquid resin composition according to claim 47, wherein the viscosity is 1.0 Pa·s or more and 15.0 Pa·s or less.

49. Said viscosity η １０Ａ The viscosity η ５Ａ Viscosity ratio Ti Ａ (η ５Ａ / １０Ａ ) is 0.1 or more and 1.5 or less.

50. The viscosity η of the second liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 25° C. ５Ｂ The two-component liquid resin composition according to any one of claims 47 to 49, wherein the viscosity is 1.0 Pa·s or more and 50.0 Pa·s or less.

51. The viscosity η of the second liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 25° C. １０Ｂ The two-component liquid resin composition according to claim 50, wherein the viscosity is 1.0 Pa·s or more and 50.0 Pa·s or less.

52. Said viscosity η １０Ｂ The viscosity η ５Ｂ Viscosity ratio Ti Ｂ (η ５Ｂ / １０Ｂ 52. The two-component liquid resin composition according to claim 51, wherein the ratio of the β- 53. The viscosity η of the mixture of the first liquid and the second liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 5 rpm and a temperature of 60° C. ５Ｐ The two-component liquid resin composition according to any one of claims 47 to 52, wherein the viscosity is 1.0 Pa·s or more and 30.0 Pa·s or less.

54. The viscosity η of the mixture of the first liquid and the second liquid measured using an E-type viscometer and a 3°×R14 cone rotor at a rotation speed of 10 rpm and a temperature of 60° C. １０Ｐ The two-component liquid resin composition according to claim 53, wherein the viscosity is 1.0 Pa·s or more and 30.0 Pa·s or less.

55. Said viscosity η １０Ｐ The viscosity η ５Ｐ Viscosity ratio Ti Ｐ (η ５Ｐ / １０Ｐ 55. The two-component liquid resin composition according to claim 54, wherein the ratio of the viscosity of the liquid resin to the viscosity of the resin is 0.5 or more and 2.0 or less.

56. A two-component liquid resin composition according to any one of claims 47 to 55, wherein the anti-settling agent (D) contains an inorganic thickener (excluding the inorganic filler (C)).

57. The two-component liquid resin composition according to claim 56, wherein the inorganic thickener comprises a layered inorganic mineral.

58. The two-component liquid resin composition according to claim 57, wherein the layered inorganic mineral comprises one or more members selected from the group consisting of clay and talc.

59. A two-component liquid resin composition according to any one of claims 47 to 58, wherein the content of the anti-settling agent (D) is 0.01% by mass or more and 2.00% by mass or less, when the entire two-component liquid resin composition is taken as 100% by mass.

60. A two-component liquid resin composition according to any one of claims 47 to 59, wherein the content of the epoxy resin (A) is 3% by mass or more and 30% by mass or less, when the entire two-component liquid resin composition is taken as 100% by mass.

61. The two-component liquid resin composition according to any one of claims 47 to 60, wherein the acid anhydride (B) comprises one or more selected from the group consisting of methyl-5-norbornene-2,3-dicarboxylic anhydride, methylcyclohexane-1,2-dicarboxylic anhydride, and methyltetrahydrophthalic anhydride.

62. A two-component liquid resin composition according to any one of claims 47 to 61, wherein the content of the acid anhydride (B) is 5% by mass or more and 20% by mass or less, when the entire two-component liquid resin composition is taken as 100% by mass.

63. A two-component liquid resin composition according to any one of claims 47 to 62, wherein the inorganic filler (C) comprises one or more members selected from the group consisting of silica, alumina, aluminum hydroxide, and calcium carbonate.

64. The average particle diameter D of the inorganic filler (C) at a cumulative value of 50% in the volume frequency particle size distribution measured by a laser diffraction scattering method ５０ The two-component liquid resin composition according to any one of claims 47 to 63, wherein the average particle diameter is 0.5 μm or more and 100 μm or less.

65. A two-component liquid resin composition according to any one of claims 47 to 64, wherein the content of the inorganic filler (C) is 65% by mass or more and 85% by mass or less, when the entire two-component liquid resin composition is taken as 100% by mass.

66. The two-component liquid resin composition according to any one of claims 47 to 65, further comprising a curing accelerator (E).

67. The two-component liquid resin composition according to claim 66, wherein the curing accelerator (E) comprises one or more selected from the group consisting of tertiary amines, quaternary ammonium salts, imidazoles, organic phosphines and Lewis acid catalysts.

68. A two-component liquid resin composition according to claim 66 or 67, wherein the content of the curing accelerator (E) is 0.01% by mass or more and 1.00% by mass or less when the entire two-component liquid resin composition is taken as 100% by mass.

69. A two-component liquid resin composition according to any one of claims 1 to 68, which can be used to encapsulate, by a casting method, a power module comprising a power module substrate including a circuit layer and a power semiconductor element on the circuit layer of the power module substrate.

70. A power module comprising: a power module substrate including a circuit layer; a power semiconductor element on the circuit layer of the power module substrate; and an encapsulant for encapsulating the power module substrate and the power semiconductor element, wherein the encapsulant comprises a cured product of a two-component liquid resin composition according to any one of claims 1 to 68.

71. The power module according to claim 70, wherein the power semiconductor element includes one or more selected from the group consisting of MOS transistors and insulated gate bipolar transistors (IGBTs).

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