Curable composition

Abstract

This curable composition and a use thereof are disclosed in the present specification. The curable composition can form a cured product that exhibits excellent thermal conductivity and volume resistance while achieving a lightweight effect by including a low-density filler and the like, and can ensure processability by exhibiting an appropriate level of viscosity. A use of the curable composition is also disclosed in the present specification.

Description

curable composition

[0001] This application claims the benefit of priority to Republic of Korea Patent Application No. 10-2023-0190435, dated December 22, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present specification discloses a curable composition and its applications.

[0003] Materials that incorporate fillers with excellent thermal conductivity into resin components are known. For example, Patent Document 1 discloses the application of a material combining a thermally conductive filler with a polymer to a battery module.

[0004] The thermal conductivity of the material is generally proportional to the filler content. While higher filler content improves the material's thermal conductivity, increasing filler content generally increases viscosity, adversely affecting the material's processability.

[0005] As disclosed in Patent Document 1, the application of the material can be performed through an injection process using equipment with a relatively narrow opening, such as a nozzle. If a large amount of filler is present in the material, the injection process may apply excessive pressure to the equipment, potentially damaging it.

[0006] In cases where the space into which the material is injected is narrow, the pressure applied to the equipment by the material itself is added to the internal pressure generated when the material is injected into the narrow space, and thus the load applied to the equipment becomes even greater.

[0007] Patent Document 1 attempts to address the above problem by controlling the particle size of the filler component contained in the material. However, Patent Document 1 assumes the use of a high-density filler such as alumina.

[0008] Alumina is advantageous in achieving high thermal conductivity, but its high density makes it disadvantageous in reducing the weight of the material.

[0009] Using low-density fillers can be considered for weight reduction. However, low-density fillers generally have poorer thermal conductivity than high-density fillers. Therefore, increasing the filler content to achieve high thermal conductivity using low-density fillers can be considered. However, even if the content of a filler with poor thermal conductivity is increased, there is a limit to how much thermal conductivity can be increased. Furthermore, even if thermal conductivity is increased, the load on the equipment cannot be reduced with the increased filler content.

[0010] Since low-density fillers generally have the characteristic of low sphericity, it is difficult to ensure compatibility when these fillers are applied in large quantities.

[0011] Depending on the intended use of the material, a certain level of insulation must be secured.

[0012] Therefore, it is a difficult problem to obtain a material that has low density characteristics, which is advantageous for weight reduction, while ensuring injection processability, achieving excellent properties such as thermal conductivity and volume resistivity, and ensuring storage and preservation stability.

[0013] [Prior Art Literature]

[0014] [Patent Document]

[0015] (Patent Document 1) Republic of Korea Patent No. 10-2393127

[0016] This specification discloses a curable composition and its uses. The purpose of this specification is to disclose a curable composition that achieves a lightweight effect using low-density fillers and the like, while also ensuring excellent thermal conductivity and volume resistivity, and exhibits an appropriate level of viscosity to ensure processability. The specification also provides uses for the curable composition.

[0017] Among the properties mentioned in this specification, properties that are affected by the measurement temperature are properties measured at room temperature, unless otherwise specified. The term "room temperature" refers to the natural temperature that has not been artificially heated or cooled, and can mean, for example, any temperature within the range of 10°C to 30°C, or a temperature of about 23°C or about 25°C.

[0018] The unit of temperature referred to in this specification is Celsius (℃), unless otherwise specified.

[0019] Among the properties mentioned in this specification, properties affected by measurement pressure are properties measured at atmospheric pressure, unless otherwise specified. The term atmospheric pressure refers to natural pressure that has not been artificially pressurized or depressurized, and can typically mean any pressure within the range of approximately 730 mmHg to 790 mmHg.

[0020] Among the properties mentioned in this specification, the properties affected by the measured humidity are properties measured at a standard humidity, unless otherwise specified. The standard humidity is a relative humidity (RH%) within a range of 40% to 60%, and for example, a relative humidity (RH%) of approximately 55% or 60%.

[0021] In this specification, the average particle size of the filler refers to the so-called D50 particle size (median particle size) unless otherwise specified. The D50 particle size is the particle diameter at the 50% point of the cumulative volume of the volume-based cumulative curve of the particle size distribution. The particle size distribution of the filler is obtained based on volume, and the particle diameter at the point where the cumulative value becomes 50% on the cumulative curve where the total volume is 100% can be designated as the average particle size. The D50 particle size can be measured by laser diffraction. The method for measuring the average particle size is described in “2. Measurement of Average Particle Diameter” of the Examples section of this specification.

[0022] In this specification, the terms spherical filler and non-spherical filler are concepts distinguished by circularity, and the category of non-spherical fillers may include square, amorphous, disc-shaped or needle-shaped fillers.

[0023] In this specification, a filler having a circularity of about 0.9 or more may be designated as a spherical filler, and a filler having a circularity of less than 0.9 may be designated as a non-spherical filler. The sphericity can be confirmed through particle shape analysis of the filler. The sphericity of a filler, which is a three-dimensional particle, is defined as the ratio (S' / S) of the surface area (S) of the filler and the surface area (S') of a sphere having the same volume as the filler. For actual fillers, circularity is generally used. The circularity is expressed as the ratio of the boundary (P) of a two-dimensional image of the actual filler to the boundary of a circle having the same area (A) as the image, and is obtained by the following formula.

[0024] <Circularity formula>

[0025] Circularity = 4πA / P 2

[0026] The above circularity is expressed as a value from 0 to 1, with a perfect circle having a value of 1, and the more irregular the shape, the lower the value. The sphericity value in this specification is the average value of the circularity measured by Marvern's particle shape analysis equipment (FPIA-3000).

[0027] The method for evaluating the above sphericity is described in “3. Evaluation of sphericity of filler” in the Examples section of this specification.

[0028] The present specification discloses a curable composition. The term "curable composition" refers to a composition capable of being cured. The term "curing" refers to a phenomenon in which the viscosity and / or hardness of the composition increases through a chemical and / or physical reaction or interaction.

[0029] The curable composition may be a solvent-based or solvent-free composition. The term solvent-based composition refers to a composition comprising a solvent (aqueous or organic solvent), and the solvent-free composition refers to a composition substantially free of the solvent. In the solvent-free composition, the upper limit of the solvent content may be about 5 wt%, 4 wt%, 3 wt%, 2 wt%, 1 wt%, 0.5 wt%, 0.1 wt%, 0.05 wt%, 0.01 wt%, 0.005 wt%, 0.001 wt%, 0.0005 wt%, or 0.0001 wt%, and the lower limit may be about 0 wt%. The solvent content in the solvent-free composition may be within a range that is less than or equal to any one of the above-described upper limits; or within a range that is less than or equal to any one of the above-described upper limits and greater than or equal to the above-described lower limit.

[0030] The curable composition may be an energy ray (e.g., ultraviolet) curable composition, a moisture-curable composition, a heat-curable composition, or a room temperature-curable composition. When the curable composition is an energy ray-curable composition, curing of the curable composition may be performed by irradiating the composition with an energy ray such as ultraviolet rays. When the curable composition is a moisture-curable composition, curing of the curable composition may be performed by maintaining the composition under an appropriate moisture content. When the curable composition is a heat-curable composition, curing of the curable composition may be performed by applying an appropriate heat to the composition. Alternatively, when the curable composition is a room temperature-curable composition, curing of the curable composition may be performed by maintaining the curable composition at room temperature.

[0031] In one example, the curable composition may be a room temperature curable composition, and in particular, may be a composition in which curing occurs by maintaining the composition at room temperature without application of energy rays or the like.

[0032] The above curable composition may be a two-component composition.

[0033] The term two-component composition means a composition in which, as is known, the components necessary for curing are stored in a physically separated state (e.g., separated into a main component and a curing agent part), and the separated components are mixed and cured by exposure to a curable environment.

[0034] Accordingly, the curable composition may include at least a subject part and a curing agent part. The subject part and the curing agent part may be physically separated during storage.

[0035] The above curable composition can exhibit excellent thermal conductivity, insulating properties, and appropriate viscosity even when it contains an excessive amount of filler (particularly a low-density filler having a hydroxyl group).

[0036] The above curable composition can satisfy the following formula 1.

[0037] [Formula 1]

[0038] 0.5 × (V R +V C ) > V M

[0039] V in Equation 1 R is the viscosity of the above subject part, and V C is the viscosity of the above hardener part, and V M is the mixing viscosity of the above-mentioned subject matter and hardener part in a 1:1 volume ratio.

[0040] That is, the curable composition ensures a mixed viscosity lower than the average viscosity of the main and curing agent parts. Due to these characteristics, the curable composition can exhibit excellent processability and injectability. These characteristics can be achieved by adjusting the filler composition of the main and curing agent parts, as described below.

[0041] The above viscosity V R , V C and V M The method of measuring is described in “6. Viscosity Evaluation” of the Examples section of this specification.

[0042] 0.5 × (V in Eq. 1 R +V C ) of V M The ratio for {[0.5 × (V R +V C )] / V M} can be adjusted. The above ratio {[0.5 × (V R +V C )] / V M} can be, for example, about 1.1, 1.5, 2, 2.5, or 3, and its upper limit can be, for example, about 15, 13, 11, 9, 7, 5, 3, 2.5, 2, or 1.5. The ratio can be within a range that is equal to or greater than any one of the lower limits described above; or within a range that is equal to or less than any one of the upper limits described above and equal to or greater than any one of the lower limits described above.

[0043] V in Equation 1 R V of C Ratio V for R / V C can also be adjusted. For example, the above ratio V R / V C The lower limit may be about 1, 1.2, 1.4, 1.6, 1.8, 1.85 or 1.9, and the upper limit may be about 15, 13, 11, 9, 7, 5, 3, 2.5, 2, 1.8 or 1.7. The ratio may be within a range that is greater than or equal to any one of the lower limits described above; or within a range that is less than or equal to any one of the upper limits described above and greater than or equal to any one of the lower limits described above.

[0044] V in Equation 1 M The lower limit may be about 70,000 cP, 75,000 cP, 80,000 cP, 85,000 cP, 90,000 cP, 95,000 cP, 100,000 cP, 150,000 cP, 200,000 cP, 210,000 cP, 220,000 cP or 230,000 cP, and the upper limit may be about 1,000,000 cP, 900,000 cP, 800,000 cP, 700,000 cP, 600,000 cP, 500,000 cP, 400,000 cP, 300,000 cP, 200,000 cP or It could be around 100,000 cP. The above V MIt may be within a range that is greater than or equal to any one of the lower limits described above; or it may be within a range that is less than or equal to any one of the upper limits described above and greater than or equal to any one of the lower limits described above.

[0045] V in Equation 1 R The lower limit of may be about 100,000 cP, 150,000 cP, 200,000 cP, 250,000 cP, 300,000 cP or 350,000 cP, and the upper limit may be about 1,000,000 cP, 900,000 cP, 800,000 cP, 700,000 cP, 600,000 cP, 500,000 cP, 400,000 cP or 350,000 cP. The above V R It may be within a range that is greater than or equal to any one of the lower limits described above; or it may be within a range that is less than or equal to any one of the upper limits described above and greater than or equal to any one of the lower limits described above.

[0046] By adjusting the viscosity characteristics of the curable composition as described above, the desired processability, etc. can be secured. These viscosity characteristics can be achieved by adjusting the composition of the filler as described below.

[0047] The cured product of the above-mentioned curable composition can exhibit high thermal conductivity. For example, the lower limit of the thermal conductivity may be about 2.8 W / mK, 2.9 W / mK, 3.0 W / mK, 3.1 W / mK, 3.2 W / mK, 3.3 W / mK, 3.4 W / mK, or 3.5 W / mK, and the upper limit may be about 50 W / mK, 45 W / mK, 40 W / mk, 35 W / mk, 30 W / mk, 25 W / mk, 20 W / mk, 15 W / mk, 10 W / mK, 9 W / mK, 8 W / mK, 7 W / mK, 6 W / mK, 5 W / mK, or 4 W / mK. The thermal conductivity may be within a range that is equal to or greater than any one of the lower limits described above; or within a range that is equal to or less than any one of the upper limits described above and equal to or greater than any one of the lower limits described above. The method for evaluating the thermal conductivity is described in "1. Evaluation of Thermal Conductivity" in the Examples section of this specification.

[0048] The cured product of the curable composition may exhibit appropriate insulating properties. For example, the curable composition or the cured product of the curable composition may exhibit appropriate volume resistivity. For example, the lower limit of the volume resistivity may be 1×10 11 , 5×10 11 , 1×10 12 , 2×10 12 , 3×10 12 , 4×10 12 , 5×10 12 or 5.5×10 12 It can be of the order of 1×10 15 , 5×10 14 , 1×10 14 , 5×10 13 , 1×10 13 , 8×10 12 , 6×10 12 , 4×10 12 or 3.5×10 12It may be a degree. The volume resistivity may be within a range that is less than or equal to any one of the upper limits described above; or within a range that is less than or equal to any one of the upper limits described above and greater than or equal to any one of the lower limits described above. The method for measuring the volume resistivity is described in “7. Volume resistivity evaluation” of the Examples section of this specification, and the unit of the volume resistivity is Ω·cm.

[0049] A curable composition exhibiting excellent properties as described above can be realized by applying the composition described below.

[0050] The above curable composition comprises a subject part and a curing agent part.

[0051] The above subject part may include at least a subject resin and a filler component, and the above curing agent part may include at least a curing agent and a filler component.

[0052] The subject resin and the curing agent described above are curable compounds. A curable compound is a compound that enables curing through chemical or physical interaction or reaction. There are no particular limitations on the types of the subject resin and the curing agent, which are curable compounds. For example, the curable compound may be a compound that, through curing, forms a resin component used in the formation of a so-called thermal interface material (TIM) or adhesive material. The term "resin component" refers to an oligomeric or polymeric material commonly referred to as "resin" in the industry.

[0053] Examples of resin components include polyurethane components, silicone components, epoxy components, or acrylic components.

[0054] In one example, the curable compound, i.e., the subject resin and the curing agent, may be compounds that react with each other to form the polyurethane component.

[0055] Known curable compounds capable of forming the above polyurethane include so-called polyols and polyisocyanates. These components can form the polyurethane through a urethane reaction. In some cases, a so-called chain extender may also be a curable compound that reacts with the polyol and / or polyisocyanate to form a polyurethane. In one example, the main resin of the above-mentioned main part may be the above-mentioned polyol, and the curing agent of the above-mentioned curing agent part may be the above-mentioned polyisocyanate.

[0056] As used herein, the term "polyol" refers to a compound containing two or more hydroxyl groups. For example, a compound containing two hydroxyl groups is typically called a diol, and a compound containing three hydroxyl groups is typically called a triol. These diols and triols are also types of polyols.

[0057] The lower limit of the number of hydroxyl groups of the polyol may be 2 or 3, and the upper limit may be 10, 9, 8, 7, 6, 5, 4, 3, or 2. The number of hydroxyl groups may be within a range that is less than or equal to any one of the upper limits described above; within a range that is greater than or equal to any one of the lower limits described above; or within a range that is less than or equal to any one of the upper limits described above and greater than or equal to any one of the lower limits described above.

[0058] The polyol may have a hydroxyl value (OH value) within an appropriate range. The hydroxyl value of the polyol may be measured according to ASTM E 1899-08. The lower limit of the hydroxyl value may be about 100 mgKOH / g, 150 mgKOH / g, 200 mgKOH / g, or 250 mgKOH / g, and the upper limit may be about 500 mgKOH / g, 450 mgKOH / g, 400 mgKOH / g, 350 mgKOH / g, or 300 mgKOH / g. The hydroxyl value may be within a range that is equal to or greater than any one of the lower limits described above; within a range that is equal to or less than any one of the upper limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above.

[0059] The polyol may have an acid value within a suitable range. The lower limit of the acid value may be about 0 mgKOH / g, and the upper limit may be about 5 mgKOH / g, 4 mgKOH / g, 3 mgKOH / g, 2 mgKOH / g, 1 mgKOH / g, 0.9 mgKOH / g, 0.8 mgKOH / g, 0.7 mgKOH / g, 0.6 mgKOH / g, 0.5 mgKOH / g, 0.4 mgKOH / g, or 0.3 mgKOH / g. The acid value may be within a range that is equal to or greater than any one of the lower limits described above; within a range that is equal to or less than any one of the upper limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above.

[0060] The lower limit of the molecular weight or weight average molecular weight of the polyol may be about 100 g / mol, 150 g / mol, 200 g / mol, 250 g / mol, 300 g / mol, 350 g / mol or 400 g / mol, and the upper limit may be about 1,000 g / mol, 900 g / mol, 800 g / mol, 700 g / mol, 600 g / mol or 500 g / mol. The molecular weight or weight average molecular weight may be within a range that is equal to or greater than any one of the lower limits described above; within a range that is equal to or less than any one of the upper limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above. The above molecular weight can be measured by the method described in “5. Evaluation of weight average molecular weight” of the Examples section of this specification.

[0061] As the polyol, any known polyol can be used without any particular limitation. Polyols that form polyurethane include polyether polyols and polyester polyols, and such polyols can be used in the curable composition.

[0062] Polyether polyols generally include (poly)ethylene glycol, diethylene glycol, (poly)propylene glycol, 1,2-butylene glycol, 2,3-butylene glycol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, 1,2-ethylhexyldiol, 1,5-pentanediol, 1,9-nonanediol, 1,10-decanediol, 1,3-cyclohexanedimethanol and 1,4-cyclohexanedimethanol, (poly)ethylenetriol, diethylenetriol, (poly)propylenetriol, glycerin, 1,2,3-butanetriol, 1,2,4-butanetriol, 1,3,4-hexanetriol, 1,3,6-hexanetriol units and / or trimethylolpropane. It is known.

[0063] In one example, the polyol may be a polyester polyol. Known polyester polyols include so-called carboxylic acid-based polyols or caprolactone-based polyols, and these polyols may be used as the resin component alone or in a mixture of two or more.

[0064] The polyol of the carboxylic acid series can be obtained by reacting a dicarboxylic acid with a polyol (e.g., a diol or a triol, etc.), as is known, and the polyol of the caprolactone series can be obtained by reacting caprolactone with a polyol (e.g., a diol or a triol, etc.), as is also known.

[0065] There is no particular limitation on the type of dicarboxylic acid applicable above, and examples thereof include one or more selected from the group consisting of phthalic acid, isophthalic acid, terephthalic acid, trimellitic acid, tetrahydrophthalic acid, hexahydrophthalic acid, tetrachlorophthalic acid, oxalic acid, adipic acid, azelaic acid, sebacic acid, succinic acid, malic acid, glataric acid, malonic acid, pimelic acid, suberic acid, 2,2-dimethylsuccinic acid, 3,3-dimethylglutaric acid, 2,2-dimethylglutaric acid, maleic acid, fumaric acid, itaconic acid, and fatty acids.

[0066] In addition, there is no particular limitation on the type of polyol applicable above, and any one or two or more selected from the group consisting of ethylene glycol, propylene glycol, 1,2-butylene glycol, 2,3-butylene glycol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, 1,2-ethylhexyldiol, 1,5-pentanediol, 1,10-decanediol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, glycerin, and trimethylolpropane may be exemplified.

[0067] The above-described curing agent part may include a polyisocyanate as a curing agent. The term polyisocyanate may refer to a compound having one or two or more isocyanate groups. The lower limit of the number of isocyanate groups of the polyisocyanate may be about 2 or 3, and the upper limit may be about 10, 9, 8, 7, 6, 5, 4, 3, or 2. The number of isocyanate groups may be within a range that is equal to or greater than any one of the lower limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above.

[0068] As polyisocyanates, those commonly used in the industry (e.g., those commonly used for forming polyurethane) can be used without any special restrictions.

[0069] For example, as the polyisocyanate, a diisocyanate (a compound having two isocyanate groups) and / or a polyisocyanate having three or more isocyanate groups can be used.

[0070] The above diisocyanates include aromatic diisocyanates such as tolylene diisocyanate, diphenylmethane diisocyanate, phenylene diisocyanate, polyethylenephenylene polyisocyanate, xylene diisocyanate, tetramethylxylene diisocyanate, trizine diisocyanate, naphthalene diisocyanate and / or triphenylmethane triisocyanate; And / or chain-linked diisocyanates such as hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, lysine diisocyanate, norbornane diisocyanate methyl, ethylene diisocyanate, propylene diisocyanate and / or tetramethylene diisocyanate, and aliphatic diisocyanates including alicyclic diisocyanates such as transcyclohexane-1,4-diisocyanate, isoborone diisocyanate, bis(isocyanatemethyl)cyclohexane diisocyanate and / or dicyclohexylmethane diisocyanate, etc. can be used. As the diisocyanate, one type or a mixture of two or more types among the types described above can be used.

[0071] As the polyisocyanate having three or more isocyanate groups, at least one selected from the group consisting of polyisocyanates in which one or more of the above-described diisocyanates are added to a polyol, polymers of the above-described diisocyanates, and biuret compounds may be exemplified. For example, an aromatic polyisocyanate that is an adduct of the above-described aromatic diisocyanate to the above-described polyol, a polymer or a biuret compound of the above-described aromatic diisocyanate; and / or an aliphatic polyisocyanate that is an adduct of the above-described aliphatic diisocyanate to the above-described polyol, a polymer and / or a biuret compound of the above-described aliphatic diisocyanate, etc. may be used. As the polyisocyanate, one or a mixture of two or more of the above-described types may be used.

[0072] In one example, the polyisocyanate in the curable composition may be an aliphatic polyisocyanate. The polyisocyanate of the curable composition may not include an aromatic polyisocyanate, and may only include an aliphatic polyisocyanate. By using only an aliphatic polyisocyanate as the polyisocyanate, it is advantageous to secure properties that have excellent compatibility when mixed with the filler component described below, while maintaining minimal viscosity change over time.

[0073] For example, when based on the total weight of the curing agent, the upper limit of the content of the aromatic polyisocyanate in the curing agent may be about 10 wt%, 9 wt%, 8 wt%, 7 wt%, 6 wt%, 5 wt%, 4 wt%, 3 wt%, 2 wt%, 1 wt%, 0.5 wt%, 0.1 wt%, 0.05 wt%, 0.01 wt%, 0.005 wt%, 0.001 wt%, 0.0005 wt% or 0.0001 wt%, and the lower limit may be about 0 wt%. The content of the aromatic polyisocyanate may be within a range that is less than or equal to any one of the upper limits described above; or within a range that is less than or equal to any one of the upper limits described above and greater than or equal to the lower limit described above.

[0074] The lower limit of the molecular weight or weight average molecular weight of the above diisocyanate may be about 100 g / mol, 110 g / mol, 120 g / mol, 130 g / mol, 140 g / mol, 150 g / mol, 160 g / mol or 170 g / mol, and the upper limit may be about 300 g / mol, 280 g / mol, 260 g / mol, 240 g / mol, 220 g / mol, 200 g / mol or 180 g / mol. The molecular weight or weight average molecular weight may be within a range that is equal to or greater than any one of the lower limits described above; within a range that is equal to or less than any one of the upper limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above.

[0075] The lower limit of the molecular weight or weight average molecular weight of the polyisocyanate having three or more isocyanate groups may be about 600 g / mol, 620 g / mol, 640 g / mol, 660 g / mol, 680 g / mol, 700 g / mol, 720 g / mol, 740 g / mol, 760 g / mol, 780 g / mol or 800 g / mol, and the upper limit may be about 1,000 g / mol, 980 g / mol, 960 g / mol, 940 g / mol, 920 g / mol, 900 g / mol, 880 g / mol, 860 g / mol or 840 g / mol. The molecular weight or weight average molecular weight is within a range that is equal to or greater than any one of the lower limits described above; It may be within a range that is less than or equal to any one of the upper limits described above; or it may be within a range that is greater than or equal to any one of the lower limits described above and less than or equal to any one of the upper limits described above.

[0076] When the polyisocyanate having three or more isocyanate groups and the diisocyanate are simultaneously applied as polyisocyanates, the lower limit of the weight ratio of the polyisocyanate having three or more isocyanate groups to 100 parts by weight of the diisocyanate may be about 1 part by weight, 10 parts by weight, 20 parts by weight, 30 parts by weight, 40 parts by weight, 50 parts by weight, 60 parts by weight, 70 parts by weight, 80 parts by weight, 90 parts by weight, or 100 parts by weight, and the upper limit may be about 1000 parts by weight, 900 parts by weight, 800 parts by weight, 700 parts by weight, 600 parts by weight, 500 parts by weight, 400 parts by weight, 300 parts by weight, 200 parts by weight, 150 parts by weight, or 100 parts by weight. The weight ratio may be within a range that is greater than or equal to any one of the lower limits described above; within a range that is less than or equal to any one of the upper limits described above; or within a range that is greater than or equal to any one of the lower limits described above and less than or equal to any one of the upper limits described above.

[0077] In one example, the subject part of the curable composition may include, as a curable compound, the polyol, and the curing agent part may include, as a curable compound, the polyisocyanate.

[0078] The content of the curable compound in the curable composition may be determined depending on the filler component. For example, in the main part, the lower limit of the ratio of the main resin to 100 parts by weight of the filler component may be about 1 part by weight, 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight, or 10 parts by weight, and the upper limit may be about 100 parts by weight, 95 parts by weight, 90 parts by weight, 85 parts by weight, 80 parts by weight, 75 parts by weight, 70 parts by weight, 65 parts by weight, 60 parts by weight, 55 parts by weight, 50 parts by weight, 45 parts by weight, 40 parts by weight, 35 parts by weight, 30 parts by weight, 25 parts by weight, 20 parts by weight, 15 parts by weight, or 10 parts by weight. The weight ratio may be within a range that is greater than or equal to any one of the lower limits described above; within a range that is less than or equal to any one of the upper limits described above; or within a range that is greater than or equal to any one of the lower limits described above and less than or equal to any one of the upper limits described above.

[0079] In the hardener part, the lower limit of the ratio of the hardener to 100 parts by weight of the filler component may be about 1 part by weight, 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight, or 10 parts by weight, and the upper limit may be about 100 parts by weight, 95 parts by weight, 90 parts by weight, 85 parts by weight, 80 parts by weight, 75 parts by weight, 70 parts by weight, 65 parts by weight, 60 parts by weight, 55 parts by weight, 50 parts by weight, 45 parts by weight, 40 parts by weight, 35 parts by weight, 30 parts by weight, 25 parts by weight, 20 parts by weight, 15 parts by weight, or 10 parts by weight. The weight ratio is within a range that is equal to or exceeds any one of the lower limits described above; It may be within a range that is less than or equal to any one of the upper limits described above; or it may be within a range that is greater than or equal to any one of the lower limits described above and less than or equal to any one of the upper limits described above.

[0080] In the curable composition, the ratio between the subject part and the curing agent part is not limited, and for example, the ratio can be controlled so that the subject resin of the subject part and the curing agent of the curing agent part can react to form polyurethane. In one example, the ratio of the subject and curing agent parts can be adjusted in consideration of the ratio (OH / NCO) of the number of moles of hydroxyl groups (OH) contained in the polyol, which is the subject resin, to the number of moles of isocyanate groups (NCO) contained in the polyisocyanate, which is the curing agent. For example, the lower limit of the ratio OH / NCO can be about 0.01, 0.05, 0.1, 0.5, or 1, and the upper limit can be about 100, 50, 25, 10, 9, 8, 7, 6, 5, 4, 3, 2, or 1. The above ratio OH / NCO may be within a range that is greater than or equal to any one of the lower limits described above; within a range that is less than or equal to any one of the upper limits described above; or within a range that is greater than or equal to any one of the lower limits described above and less than or equal to any one of the upper limits described above.

[0081] The curable composition includes a filler component along with the curable compound. The term "filler component" refers to a component consisting solely of fillers. Therefore, all fillers included in the curable composition can be combined to form the filler component.

[0082] The lower limit of the weight ratio of the filler component in the curable composition may be about 70 wt%, 70 wt%, 71 wt%, 72 wt%, 73 wt%, 74 wt%, 75 wt%, 76 wt%, 77 wt%, 78 wt%, 79 wt%, 80 wt%, 81 wt%, 82 wt%, 83 wt%, 84 wt%, 85 wt%, 86 wt%, 87 wt%, 88 wt%, 89 wt% or 90 wt%, and the upper limit may be about 99 wt%, 98 wt%, 97 wt%, 96 wt%, 95 wt%, 94 wt%, 93 wt%, 92 wt%, 91 wt%, 90 wt%, 89 wt%, 88 wt% or 87 wt%. The weight ratio of the above filler component may be within a range that is equal to or greater than any one of the lower limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above. The weight ratio of the above filler component may be the weight ratio of the filler component in the main part; or the weight ratio of the filler component in the curing agent part; or the weight ratio of the filler component in a mixture of the main part and the curing agent part.

[0083] The above filler component may include a thermally conductive filler or may be a thermally conductive filler component. The term thermally conductive filler component or thermally conductive filler refers to a filler component or filler that enables the cured product of the curable composition to exhibit the thermal conductivity described above through the filler.

[0084] Examples of fillers forming the above filler component include, but are not limited to, oxide fillers such as aluminum oxide (alumina), magnesium oxide, beryllium oxide, or titanium oxide; nitride fillers such as boron nitride, silicon nitride, or aluminum nitride; carbide fillers such as silicon carbide; hydroxide fillers such as aluminum hydroxide or magnesium hydroxide; metal fillers such as copper, silver, iron, aluminum, or nickel; metal alloy fillers such as titanium; or silicon powder such as quartz, glass, or silica. In addition, when securing insulating properties is taken into consideration, the application of carbon fillers such as graphite or activated carbon can also be considered.

[0085] The composition of the filler component can be adjusted to secure desired properties, such as viscosity characteristics, thermal conductivity and / or volume resistivity.

[0086] For example, the filler component may be a mixture of two or more types of fillers having different average particle diameters. For example, the lower limit of the number of types of fillers having different average particle diameters in the mixture as the filler component may be about 2, 3, or 4, and the upper limit may be about 10, 9, 8, 7, 6, 5, 4, or 3. The number of types of fillers may be within a range that is equal to or greater than any one of the lower limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above.

[0087] In the above state, the weighted average particle size of the filler component can be adjusted. The term weighted average particle size as used above is a result value considering the average particle size of the two or more fillers included in the filler component and the ratio of the fillers. For example, if a filler component is a mixture in which a filler (1) having an average particle size of D1, a filler (2) having an average particle size of D2, a filler (3) having an average particle size of D3, and a filler (4) having an average particle size of D4 are mixed in a weight ratio of W1:W2:W3:W4 (1:2:3:4), the weighted average particle size of the filler component is calculated as (D1×W1+D2×W2+D3×W3+D4×W4) / (W1+W2+W3+W4).

[0088] For example, the weighted average particle size of the filler components of the subject part and the hardener part can be adjusted so that △D of the following equation 2 falls within a predetermined range.

[0089] [Formula 2]

[0090] △D = 100×D C / D R

[0091] D in Equation 2 R is the weighted average particle size of the filler component of the subject part, and D C is the weighted average particle size of the filler component of the hardener part.

[0092] The lower limit of △D in the above formula 2 may be about 30, 50, 70, 90, 100, 110, 120, or 130, and the upper limit may be about 500, 450, 400, 350, 300, 250, 200, 150, or 120. The △D may be within a range that is equal to or greater than any one of the lower limits described above; within a range that is equal to or less than any one of the upper limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above. By adjusting the components of the filler as described above, the desired properties (viscosity properties, volume resistivity, and / or thermal conductivity, etc.) can be easily secured.

[0093] D in Equation 2 R The lower limit of the D may be about 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm or 43 μm, and the upper limit may be about 200 μm, 190 μm, 180 μm, 170 μm, 160 μm, 150 μm, 140 μm, 130 μm, 120 μm, 110 μm, 100 μm, 90 μm, 85 μm, 80 μm, 75 μm, 70 μm, 65 μm, 60 μm, 55 μm, 50 μm, 45 μm, 40 μm or 35 μm. R It may be within a range that is equal to or greater than any one of the lower limits described above; or within a range that is equal to or less than any one of the upper limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above. By adjusting the components of the filler in this way, the desired properties (viscosity properties, volume resistivity, and / or thermal conductivity, etc.) can be easily secured.

[0094] In the above state, the weighted average BET specific surface area of ​​the filler component can be adjusted. The term weighted average BET specific surface area as used above is a result value considering the BET specific surface areas of the two or more fillers included in the filler component and the ratio of the fillers. For example, if a filler component is a mixture in which a filler (1) having a BET specific surface area of ​​B1, a filler (2) having a BET specific surface area of ​​B2, a filler (3) having a BET specific surface area of ​​B3, and a filler (4) having a BET specific surface area of ​​B4 are mixed in a weight ratio of W1:W2:W3:W4 (1:2:3:4), the weighted average BET specific surface area of ​​the filler component is calculated as (B1×W1+B2×W2+B3×W3+B4×W4) / (W1+W2+W3+W4).

[0095] Meanwhile, the BET specific surface area of ​​the filler can be evaluated in the manner described in "4. Evaluation of the specific surface area of ​​the filler" of the Examples section of this specification. In addition, the unit of the BET specific surface area or the weighted average BET specific surface area in this specification is m 2 / g is.

[0096] For example, the weighted average BET surface area of ​​the filler components of the subject part and the curing agent part can be adjusted so that △B in Equation 3 below falls within a predetermined range.

[0097] [Formula 3]

[0098] △B = 100×B R / B C

[0099] B in Equation 3 R is the weighted average BET surface area of ​​the filler component of the subject part, and B C is the weighted average BET surface area of ​​the filler component of the hardener part.

[0100] The lower limit of △B in the above formula 3 may be about 10, 30, 50, 70, 90, 100, 110, 120, or 130, and the upper limit may be about 500, 450, 400, 350, 300, 250, 200, 150, or 100. The △B may be within a range that is equal to or greater than any one of the lower limits described above; or within a range that is equal to or less than any one of the upper limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above. By adjusting the components of the filler as described above, the desired properties (viscosity properties, volume resistivity, and / or thermal conductivity, etc.) can be easily secured.

[0101] B in Equation 3 R The lower limit is 0.01 m 2 / g, 0.05 m 2 / g, 0.1 m 2 / g, 0.5 m 2 / g, 1 m 2 / g or 1.5 m 2 / g can be about, and its upper limit is 10 m 2 / g, 9 m 2 / g, 8 m 2 / g, 7 m 2 / g, 6 m 2 / g, 5 m 2 / g, 4 m 2 / g, 3 m 2 / g, 2 m 2 / g, 1.5 m 2 / g or 1 m 2 / g may be about B above RIt may be within a range that is equal to or greater than any one of the lower limits described above; or within a range that is equal to or less than any one of the upper limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above. By adjusting the components of the filler in this way, the desired properties (viscosity properties, volume resistivity, and / or thermal conductivity, etc.) can be easily secured.

[0102] In cases where each of the filler components of the above subject and hardener parts is composed of a spherical filler and a non-spherical filler, the weighted average particle diameter and / or the weighted average BET specific surface area may be additionally adjusted in consideration of the intended effect.

[0103] For example, the weighted average particle size of the filler components of the above subject part and the hardener part is △D in the following equation 4, respectively. S can be adjusted to be within a certain range.

[0104] [Formula 4]

[0105] △D S = 100×D CS / D RS

[0106] D in Equation 4 S is the weighted average particle size of all spherical fillers included in the filler component of the subject part, and D CS is the weighted average particle size of all spherical fillers included in the filler component of the hardener part.

[0107] △D in Equation 4 S The lower limit of may be about 30, 50, 70, 90 or 100, and the upper limit may be about 500, 450, 400, 350, 300, 250, 200, 150, 120, 110 or 100. The above △D SIt may be within a range that is equal to or greater than any one of the lower limits described above; or within a range that is equal to or less than any one of the upper limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above. By adjusting the components of the filler in this way, the desired properties (viscosity properties, volume resistivity, and / or thermal conductivity, etc.) can be easily secured.

[0108] D in Equation 4 RS The lower limit of may be about 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm or 70 μm, and the upper limit may be about 200 μm, 190 μm, 180 μm, 170 μm, 160 μm, 150 μm, 140 μm, 130 μm, 120 μm, 110 μm, 100 μm, 95 μm or 90 μm. The above D RS It may be within a range that is equal to or greater than any one of the lower limits described above; or within a range that is equal to or less than any one of the upper limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above. By adjusting the components of the filler in this way, the desired properties (viscosity properties, volume resistivity, and / or thermal conductivity, etc.) can be easily secured.

[0109] The weighted average particle size of the filler components of the subject part and the hardener part is △D in the following formula 5, respectively. A can be adjusted to be within a certain range.

[0110] [Formula 5]

[0111] △D A = 100×D CA / D RA

[0112] D in Equation 5 RA is the weighted average particle size of all non-spherical fillers included in the filler component of the subject part, and D CA is the weighted average particle size of all non-spherical fillers included in the filler component of the hardener part.

[0113] △D of the above equation 5 A The lower limit of may be about 0.5, 1, 5, 7, 10, 20, 30, 50, 70, 90, 95 or 100, and the upper limit may be about 300, 250, 200, 150, 100, 90, 80, 70, 60, 50, 40, 30, 20 or 10. The above △D A It may be within a range that is equal to or greater than any one of the lower limits described above; or within a range that is equal to or less than any one of the upper limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above. By adjusting the components of the filler in this way, the desired properties (viscosity properties, volume resistivity, and / or thermal conductivity, etc.) can be easily secured.

[0114] D in Equation 5 RA The lower limit may be about 0.1 μm, 0.5 μm, 1 μm, 1.5 μm, 2 μm, 5 μm, 10 μm, 15 μm, 20 μm, or 25 μm, and the upper limit is 200 μm, 190 μm, 180 μm, 170 μm, 160 μm, 150 μm, 140 μm, 130 μm, 120 μm, 110 μm, 100 μm, 90 μm, 85 μm, 80 μm, 75 μm, 70 μm, 65 μm, 60 μm, 55 μm, 50 μm, 45 μm, 40 μm, 35 μm, 30 μm, 25 μm, 20 μm, It can be about 15 μm, 10 μm, 8 μm, 6 μm, 4 μm or 3 μm. The above DRA It may be within a range that is equal to or greater than any one of the lower limits described above; or within a range that is equal to or less than any one of the upper limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above. By adjusting the components of the filler in this way, the desired properties (viscosity properties, volume resistivity, and / or thermal conductivity, etc.) can be easily secured.

[0115] For example, the weighted average BET surface area of ​​the filler components of the subject part and the hardener part is △B in Equation 6 below, respectively. S can be adjusted to be within a certain range.

[0116] [Formula 6]

[0117] △B S = 100×B RS / B CS

[0118] B in Equation 6 RS is the weighted average BET surface area of ​​all spherical fillers included in the filler component of the subject part, and B CS is the weighted average BET surface area of ​​all spherical fillers included in the filler component of the hardener part. 50 500

[0119] △B of the above equation 6 S The lower limit of may be about 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100 or 105, and the upper limit may be about 500, 450, 400, 350, 300, 250, 200, 150, 130, 120, 110 or 100. The above △B SIt may be within a range that is equal to or greater than any one of the lower limits described above; or within a range that is equal to or less than any one of the upper limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above. By adjusting the components of the filler in this way, the desired properties (viscosity properties, volume resistivity, and / or thermal conductivity, etc.) can be easily secured.

[0120] B in Equation 6 RS The lower limit is 0.001 m 2 / g, 0.005 m 2 / g, 0.01 m 2 / g, 0.05 m 2 / g or 0.1 m 2 / g can be about, and its upper limit is 10 m 2 / g, 9 m 2 / g, 8 m 2 / g, 7 m 2 / g, 6 m 2 / g, 5 m 2 / g, 4 m 2 / g, 3 m 2 / g, 2 m 2 / g, 1.5 m 2 / g, 1 m 2 / g, 0.9 m 2 / g, 0.8 m 2 / g, 0.7 m 2 / g, 0.6 m 2 / g, 0.5 m 2 / g, 0.4 m 2 / g, 0.3 m 2 / g or 0.2 m 2 / g may be about B above RSIt may be within a range that is equal to or greater than any one of the lower limits described above; or within a range that is equal to or less than any one of the upper limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above. By adjusting the components of the filler in this way, the desired properties (viscosity properties, volume resistivity, and / or thermal conductivity, etc.) can be easily secured.

[0121] For example, the weighted average BET surface area of ​​the filler components of the subject part and the hardener part is △B in the following equation 7, respectively. A can be adjusted to be within a certain range.

[0122] [Formula 7]

[0123] △B A = 100×B RA / B CA

[0124] B in Equation 7 RA is the weighted average BET surface area of ​​all non-spherical fillers included in the filler component of the subject part, and B CA is the weighted average BET surface area of ​​all non-spherical fillers included in the filler component of the curing agent part. 20400

[0125] △B of the above formula 7 A The lower limit of may be about 20, 30, 50, 70, 90, 95 or 100, and the upper limit may be about 500, 450, 400, 350, 300, 250, 200, 150, 100, 90, 80, 70, 60 or 55. The above △B AIt may be within a range that is equal to or greater than any one of the lower limits described above; or within a range that is equal to or less than any one of the upper limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above. By adjusting the components of the filler in this way, the desired properties (viscosity properties, volume resistivity, and / or thermal conductivity, etc.) can be easily secured.

[0126] B in Equation 7 RA The lower limit is 0.01 m 2 / g, 0.05 m 2 / g, 0.1 m 2 / g, 0.5 m 2 / g, 1 m 2 / g, 1.5 m 2 / g, 2 m 2 / g, 2.5 m 2 / g, 3 m 2 / g or 3.5 m 2 / g can be about, and its upper limit is 10 m 2 / g, 9 m 2 / g, 8 m 2 / g, 7 m 2 / g, 6 m 2 / g, 5 m 2 / g, 4 m 2 / g, 3 m 2 / g or 2 m 2 / g may be about B above RA It may be within a range that is equal to or greater than any one of the lower limits described above; or within a range that is equal to or less than any one of the upper limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above. By adjusting the components of the filler in this way, the desired properties (viscosity properties, volume resistivity, and / or thermal conductivity, etc.) can be easily secured.

[0127] The spherical filler as described above may include, for example, at least an oxide filler and / or a nitride filler among the various fillers described above.

[0128] For example, the lower limit of the ratio of the total weight of the oxide filler and the nitride filler based on the total weight of the spherical filler among the filler components in the subject part and / or the hardener part may be about 50 wt%, 55 wt%, 60 wt%, 65 wt%, 70 wt%, 75 wt%, 80 wt%, 85 wt%, 90 wt% or 95 wt%, and the upper limit may be about 100 wt% or 95 wt%. The weight ratio may be within a range that is equal to or greater than any one of the above-described lower limits; within a range that is equal to or less than any one of the above-described upper limits; or within a range that is equal to or greater than any one of the above-described lower limits and equal to or less than any one of the above-described upper limits.

[0129] The non-spherical filler as described above may include, for example, at least a hydroxide filler among the various fillers described above.

[0130] For example, among the filler components in the subject part and / or the curing agent part, the lower limit of the weight ratio of the hydroxide filler based on the total weight of the spherical filler may be about 50 wt%, 55 wt%, 60 wt%, 65 wt%, 70 wt%, 75 wt%, 80 wt%, 85 wt%, 90 wt% or 95 wt%, and the upper limit may be about 100 wt% or 95 wt%. The weight ratio may be within a range that is equal to or greater than any one of the lower limits described above; within a range that is equal to or less than any one of the upper limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above.

[0131] The above filler component may include at least a low-density filler and a high-density filler. The terms low-density and high-density fillers refer to fillers having a certain level of density. For example, the upper limit of the density of the low-density filler is 3.00 g / cm. 3 , 2.90 g / cm 3 , 2.80 g / cm 3 , 2.70 g / cm 3 , 2.60 g / cm 3 , 2.50 g / cm 3 or 2.45 g / cm 3 It can be of the order of 1.5 g / cm 3 , 2 g / cm 3 , 2.1 g / cm 3 , 2.2 g / cm 3 , 2.3 g / cm 3 or 2.4 g / cm 3 The density of the low-density filler may be within a range that is less than or equal to any one of the upper limits described above; or within a range that is greater than or equal to any one of the lower limits described above and less than or equal to any one of the upper limits described above.

[0132] For example, the lower limit of the density of the high-density filler is 3.00 g / cm 3 , 3.1 g / cm 3 , 3.2 g / cm 3 , 3.3 g / cm 3 , 3.4 g / cm 3 , 3.5 g / cm 3 , 3.6 g / cm 3 , 3.7 g / cm 3 , 3.8 g / cm 3 , can be about 3.9 g / cm3 or 3.95 g / cm3, and its upper limit is 7 g / cm 3 , 6.5 g / cm 3 , 6 g / cm 3 , 5.5 g / cm 3 , 5 g / cm3 , 4.5 g / cm 3 or 4 g / cm 3 The density of the high-density filler may be within a range that is equal to or greater than any one of the lower limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above.

[0133] The density of the above filler can be measured in a known manner, for example, based on the ASTM D792 standard.

[0134] The above-mentioned spherical filler may include, for example, at least the high-density filler among the various fillers described above.

[0135] For example, among the filler components in the subject part and / or the curing agent part, the lower limit of the weight ratio of the high-density filler based on the total weight of the spherical filler may be about 50 wt%, 55 wt%, 60 wt%, 65 wt%, 70 wt%, 75 wt%, 80 wt%, 85 wt%, 90 wt% or 95 wt%, and the upper limit may be about 100 wt% or 95 wt%. The weight ratio may be within a range that is equal to or greater than any one of the lower limits described above; within a range that is equal to or less than any one of the upper limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above.

[0136] The non-spherical filler as described above may include, for example, at least the low-density filler among the various fillers described above.

[0137] For example, among the filler components in the subject part and / or the curing agent part, the lower limit of the weight ratio of the low-density filler based on the total weight of the spherical filler may be about 50 wt%, 55 wt%, 60 wt%, 65 wt%, 70 wt%, 75 wt%, 80 wt%, 85 wt%, 90 wt% or 95 wt%, and the upper limit may be about 100 wt% or 95 wt%. The weight ratio may be within a range that is equal to or greater than any one of the lower limits described above; within a range that is equal to or less than any one of the upper limits described above; or within a range that is equal to or greater than any one of the lower limits described above and equal to or less than any one of the upper limits described above.

[0138] By applying the filler component as described above, a curable composition or a cured product thereof exhibiting the desired properties can be formed.

[0139] The subject and curing agent parts of the curable composition basically include the curable compound and filler components described above, and may include additional components as needed. The types of components that may be included are not particularly limited. For example, one or more of common components, such as a plasticizer, a curing catalyst, a flame retardant, a viscosity modifier, a thixotropic agent, a diluent, a surface treatment agent, and / or a coupling agent, may be added to the curable composition as needed.

[0140] The above curable composition can be prepared by mixing each of the components listed above. There are no special restrictions on the mixing method used in this process, and any known mixing method for preparing the composition can be applied.

[0141] For example, the above-mentioned subject part may additionally include a catalyst. In this case, there is no particular limitation on the specific type of the catalyst, and for example, a general urethane reaction catalyst may be applied.

[0142] The present specification also discloses uses of the curable composition or the cured product thereof. For example, the present specification discloses a product comprising a heat-generating component and a material in contact with the heat-generating component, wherein the material comprises the curable composition or the cured product thereof as described above.

[0143] There are no specific limitations on the type of the above-mentioned heat-generating component, and any component that generates heat during use or storage and for which the heat generated by such heat must be managed can be applied. In the above-mentioned product, a material including the curable composition or its cured product can be used as a so-called TIM (Thermal Interface Material).

[0144] For example, various electrical and electronic products such as irons, washing machines, dryers, clothes managers, electric shavers, microwave ovens, electric ovens, electric rice cookers, refrigerators, dishwashers, air conditioners, fans, humidifiers, air purifiers, mobile phones, walkie-talkies, televisions, radios, computers or laptops, or battery products such as secondary batteries may contain heat-generating components such as the above.

[0145] For example, in the above product, the material including the curable composition or its cured product may be used to transfer heat generated from the heat-generating component to a cooling portion. In this case, the material may dissipate heat generated from the heat-generating component. The heat-generating component may be a battery cell or a battery module.

[0146] This specification discloses a curable composition and its uses. The curable composition can achieve a weight-saving effect by including low-density fillers and the like, while forming a cured product exhibiting excellent thermal conductivity and volume resistivity. Furthermore, it exhibits an appropriate level of viscosity, thereby ensuring processability. The specification also discloses uses of the curable composition.

[0147] Hereinafter, the curable composition and the like are specifically described through examples and comparative examples, but the scope of the curable composition and the like is not limited to the contents presented below.

[0148]

[0149] 1. Evaluation of thermal conductivity

[0150] Thermal conductivity was measured using the Hot-Disk method according to the ISO 22007-2 standard. Specifically, a mixture of the main and hardener parts of the curable compositions manufactured in the examples or comparative examples in a volume ratio of 1:1 was placed in a mold with a thickness of about 7 mm, cured, and thermal conductivity was measured in the through-plane direction using a Hot-Disk device. As specified in the standard ISO 22007-2, the Hot-Disk device is a device that can check thermal conductivity by measuring the temperature change (electrical resistance change) when a sensor having a nickel wire in a double spiral structure is heated, and thermal conductivity was measured according to this standard. Curing of the curable composition as described above was performed by maintaining a mixture of the main and hardener parts in a volume ratio of 1:1 at room temperature (about 25°C) for about 24 hours.

[0151]

[0152] 2. Measurement of average particle size

[0153] The average particle size of the filler referred to herein is the D50 particle size of the filler, which is the particle size measured using a Mastersizer 3000 from Marvern in accordance with the ISO-13320 standard. Ethanol was used as the solvent during the measurement. The incident laser is scattered by the fillers dispersed in the solvent, and the intensity and directionality of the scattered laser vary depending on the size of the filler. By analyzing this using Mie theory, the D50 particle size can be obtained. Through the analysis, the distribution is obtained by converting it into the diameter of a sphere having the same volume as the dispersed filler, and the D50 value, which is the median value of the distribution, can be obtained to evaluate the particle size.

[0154]

[0155] 3. Evaluation of the sphericity of the filler

[0156] Whether a filler is a spherical filler was evaluated by measuring its sphericity. The sphericity of a filler, which is a three-dimensional particle, is defined as the ratio (S' / S) of the surface area (S) of the particle to the surface area (S') of a sphere having the same volume as the particle, and for actual particles, it is usually the average value of circularity. The circularity is the ratio of the boundary (P) of the image obtained from a two-dimensional image of the particle to the boundary of a circle having the same area (A) as the same image, and is theoretically obtained by the following formula. The circularity is a value from 0 to 1, and the circularity is 1 for an ideal circle. In this specification, a filler having a circularity of 0.9 or more is defined as a spherical filler, and a filler having a circularity of less than 0.9 or being amorphous is defined as a non-spherical filler.

[0157] <Circularity formula>

[0158] Circularity = 4πA / P 2

[0159] The sphericity in this specification is the average value of the circularity measured by Marvern's particle shape analysis equipment (FPIA-3000).

[0160]

[0161] 4. Evaluation of the specific surface area of ​​the filler

[0162] The BET (Brunauer-Emett-Teller) specific surface area is the specific surface area calculated by the BET (Brunauer-Emett-Teller) method using the adsorption curve obtained by adsorbing nitrogen gas on a sample. The BET specific surface area is calculated by the ASAP (Accelerated Surface Area and Porosimetry System) TM It was obtained by adsorbing nitrogen gas using 2020.

[0163]

[0164] 5. Evaluation of weight average molecular weight

[0165] The weight-average molecular weight (Mw) was measured using gel permeation chromatography (GPC). The unit of the weight-average molecular weight is g / mol. The sample was placed in a 20 mL vial and diluted with THF (tetrahydrofuran) to a concentration of approximately 20 mg / mL. The calibration standard sample and the sample to be analyzed were filtered through a syringe filter (pore size: 0.2 μm), and the weight-average molecular weight was measured. Agilent Technologies' ChemStation was used as the analysis program, and the weight-average molecular weight (Mw) was calculated by comparing the elution time with the calibration curve.

[0166] <GPC 측정 조건>

[0167] Device: Agilent Technologies 1200 series

[0168] Column: Using TL Mix. A & B from Agilent Technologies

[0169] Solvent: THF

[0170] Column temperature: 40℃

[0171] Sample concentration: 20 mg / mL, 10 μl injection

[0172] MP: 364000, 91450, 17970, 4910, 1300 used as standard samples

[0173]

[0174] 6. Viscosity evaluation

[0175] Viscosity can be measured using a viscosity meter (Brookfield DVNext) and a spindle CP-52Z. The spindle is selected according to the viscosity measurement range. After adjusting the zero point of the viscosity meter, the spindle is mounted on the spindle connection, a plate is mounted on the plate connection, and then the adjustment lever is adjusted so that a certain gap is created between the spindle and the plate. The plate is separated, and approximately 0.5 mL of a viscosity measurement target is applied to the center of the separated plate, and then the plate coated with the curable composition is remounted on the plate connection, and the viscosity is measured under conditions of approximately 25°C and a rotation speed of 2.4 rpm within 3 minutes.

[0176]

[0177] 7. Volume resistance evaluation

[0178] The volume resistivity was evaluated according to the measurement standard of ASTM D257. Specifically, the composition in which each curing agent part manufactured through the examples and comparative examples was mixed with the main part of Manufacturing Example 1 in a volume ratio of 1:1 was cured to obtain a disk-shaped cured product having a diameter of about 10 cm and a thickness of about 0.2 cm. The curing was performed in the same manner as the thermal conductivity measurement. Subsequently, the volume resistivity was measured using a volume resistivity measuring device (HIRESTA-US_MCP-HT8000, Mitsubishi chemical), and an applied voltage of 500 V, a measurement time of 1 minute, and the thickness of the disk-shaped cured product were input into the device.

[0179]

[0180] Example 1.

[0181] Manufacturing of the subject part

[0182] The subject part was prepared by mixing polyol (P), filler component (F) and urethane reaction catalyst (C) in a weight ratio of 9.1:0.1:90.8 (P:F:C). The polyol was polyester polyol (Capa TM 2043) (Mw: approximately 400 g / mol) was used, and dibutyltin dilaurate was used as a catalyst.

[0183] The above filler component has a D50 particle size of approximately 70 μm and a BET specific surface area of ​​approximately 0.10 m 2 / g spherical filler A1 (alumina), D50 particle size is about 50 μm, and specific surface area is about 0.33 m 2 / g of non-spherical filler H1 (aluminum hydroxide), D50 particle size is about 2 μm, and specific surface area is about 3.5 m 2 / g of non-spherical filler H2 (aluminum hydroxide) was mixed and manufactured. The mixing ratio was 4:2:4 (A1:H1:H2) by weight.

[0184] The weighted average particle size of the entire filler component was approximately 38.8 μm, the weighted average particle size of the spherical filler was approximately 70 μm, and the weighted average particle size of the non-spherical filler was approximately 18 μm. In addition, the weighted BET specific surface area of ​​the entire filler component was approximately 1.51 m 2 / g, and the weighted average BET surface area of ​​the old filler was about 0.10 m 2 / g, and the weighted average BET surface area of ​​the non-spherical filler was approximately 2.44 m 2 It was around / g.

[0185] The viscosity of the subject part manufactured in this way was approximately 333,400 cP.

[0186]

[0187] Manufacturing of hardener parts

[0188] A curable composition was prepared by mixing polyisocyanate (N) and filler component (F) in a weight ratio (N:F) of 9.2:90.8. As the polyisocyanate, HDI (Hexamethylene diisocyanate) was used.

[0189] The above filler component is filler A1 (alumina) of Example 1, with a D50 particle size of about 20 μm and a specific surface area of ​​about 0.14 m 2 / g of spherical filler A2 (alumina) and filler H2 (aluminum hydroxide) of Example 1 were mixed to produce the product. The filler components were mixed in a weight ratio of 6:1:3 (A1:A2:H2).

[0190] The weighted average particle size of the entire filler component was approximately 44.6 μm, the weighted average particle size of the spherical filler was approximately 62.86 μm, and the weighted average particle size of the non-spherical filler was approximately 2 μm. In addition, the weighted BET specific surface area of ​​the entire filler component was approximately 1.12 m 2 / g, and the weighted average BET surface area of ​​the old filler was about 0.11 m 2 / g, and the weighted average BET surface area of ​​the non-spherical filler was approximately 3.50 m 2 It was around / g.

[0191] The viscosity of the hardener part manufactured in this way was approximately 195,100 cP.

[0192]

[0193] Preparation of curable composition

[0194] A curable composition was prepared by mixing the above-mentioned subject part and the hardener part in a volume ratio of 1:1. The viscosity (mixed viscosity) measured immediately after preparation of the curable composition (immediately after mixing) was approximately 104,800 cP.

[0195]

[0196] Example 2.

[0197] The main part was manufactured by mixing polyol (P), filler component (F), and urethane reaction catalyst (C) in the same weight ratio as in Example 1. In the above, the same polyol and urethane reaction catalyst as in Example 1 were used.

[0198] The above filler component was prepared by mixing fillers A1, H2, and A2 of Example 1. The mixing ratio was 6:1:3 (A1:A2:H2) by weight.

[0199] The weighted average particle size of the entire filler component was approximately 44.6 μm, the weighted average particle size of the spherical filler was approximately 62.86 μm, and the weighted average particle size of the non-spherical filler was approximately 2 μm. In addition, the weighted BET specific surface area of ​​the entire filler component was approximately 1.12 m 2 / g, and the weighted average BET surface area of ​​the old filler was about 0.11 m 2 / g, and the weighted average BET surface area of ​​the non-spherical filler was approximately 3.50 m 2 It was around / g.

[0200] The viscosity of the subject part manufactured in this way was approximately 321,600 cP.

[0201] In addition, a curable composition was prepared by mixing the above-mentioned subject part with the curing agent part of Example 1 in a volume ratio of 1:1, and the viscosity (mixed viscosity) measured immediately after preparation of the curable composition (immediately after mixing) was approximately 86,070 cP.

[0202]

[0203] Example 3.

[0204] The main part was manufactured by mixing polyol (P), filler component (F), and urethane reaction catalyst (C) in the same weight ratio as in Example 1. In the above, the same polyol and urethane reaction catalyst as in Example 1 were used.

[0205] The above filler component was prepared by mixing fillers A1, H1, H2 and A2 of Example 1. The mixing ratio was 4:2:1:3 (A1:H1:A2:H2) by weight.

[0206] The weighted average particle size of the entire filler component was approximately 40.6 μm, the weighted average particle size of the spherical filler was approximately 60 μm, and the weighted average particle size of the non-spherical filler was approximately 21.2 μm. In addition, the weighted BET specific surface area of ​​the entire filler component was approximately 1.17 m 2 / g, and the weighted average BET surface area of ​​the old filler was about 0.11 m 2 / g, and the weighted average BET surface area of ​​the non-spherical filler was approximately 2.23 m 2 It was around / g.

[0207] The viscosity of the subject part manufactured in this way was approximately 343,300 cP.

[0208] In addition, a curable composition was prepared by mixing the above-mentioned subject part with the curing agent part of Example 1 in a volume ratio of 1:1, and the viscosity (mixed viscosity) measured immediately after preparation of the curable composition (immediately after mixing) was approximately 192,100 cP.

[0209]

[0210] Example 4.

[0211] The main part was manufactured by mixing polyol (P), filler component (F), and urethane reaction catalyst (C) in the same weight ratio as in Example 1. In the above, the same polyol and urethane reaction catalyst as in Example 1 were used.

[0212] The above filler component was prepared by mixing fillers A1, H1, H2, and A2 of Example 1. The mixing ratio was 40:20:15:20 (A1:H1:A2:H2) by weight.

[0213] The weighted average particle size of the entire filler component was approximately 43.58 μm, the weighted average particle size of the spherical filler was approximately 56.36 μm, and the weighted average particle size of the non-spherical filler was approximately 26.0 μm. In addition, the weighted BET specific surface area of ​​the entire filler component was approximately 0.87 m 2 / g, and the weighted average BET surface area of ​​the old filler was about 0.11 m 2 / g, and the weighted average BET surface area of ​​the non-spherical filler was approximately 1.92 m 2 It was around / g.

[0214] The viscosity of the subject part manufactured in this way was approximately 375,700 cP.

[0215] In addition, a curable composition was prepared by mixing the above-mentioned subject part with the curing agent part of Example 1 in a volume ratio of 1:1, and the viscosity (mixed viscosity) measured immediately after preparation of the curable composition (immediately after mixing) was approximately 177,800 cP.

[0216]

[0217] Example 5.

[0218] The main part was manufactured by mixing polyol (P), filler component (F), and urethane reaction catalyst (C) in the same weight ratio as in Example 1. In the above, the same polyol and urethane reaction catalyst as in Example 1 were used.

[0219] The above filler component was prepared by mixing fillers A1, H1, H2 and A2 of Example 1. The mixing ratio was 4:2:2:2 (A1:H1:A2:H2) by weight.

[0220] The weighted average particle size of the entire filler component was approximately 42.40 μm, the weighted average particle size of the spherical filler was approximately 53.33 μm, and the weighted average particle size of the non-spherical filler was approximately 26.0 μm. In addition, the weighted BET specific surface area of ​​the entire filler component was approximately 0.83 m 2 / g, and the weighted average BET surface area of ​​the old filler was about 0.11 m 2 / g, and the weighted average BET surface area of ​​the non-spherical filler was approximately 1.92 m 2 It was around / g.

[0221] The viscosity of the subject part manufactured in this way was approximately 374,400 cP.

[0222] In addition, a curable composition was prepared by mixing the above-mentioned subject part with the curing agent part of Example 1 in a volume ratio of 1:1, and the viscosity (mixed viscosity) measured immediately after preparation of the curable composition (immediately after mixing) was approximately 239,700 cP.

[0223]

[0224] Example 6.

[0225] The main part was manufactured by mixing polyol (P), filler component (F), and urethane reaction catalyst (C) in the same weight ratio as in Example 1. In the above, the same polyol and urethane reaction catalyst as in Example 1 were used.

[0226] The above filler component was prepared by mixing fillers A1, H1, H2 and A2 of Example 1. The mixing ratio was 3:2:1:4 (A1:H1:A2:H2) by weight.

[0227] The weighted average particle size of the entire filler component was approximately 33.80 μm, the weighted average particle size of the spherical filler was approximately 57.50 μm, and the weighted average particle size of the non-spherical filler was approximately 18.0 μm. In addition, the weighted BET specific surface area of ​​the entire filler component was approximately 1.51 m 2 / g, and the weighted average BET surface area of ​​the old filler was about 0.11 m 2 / g, and the weighted average BET surface area of ​​the non-spherical filler was approximately 2.44 m 2 It was around / g.

[0228] The viscosity of the subject part manufactured in this way was approximately 375,700 cP.

[0229] In addition, a curable composition was prepared by mixing the above-mentioned subject part with the curing agent part of Example 1 in a volume ratio of 1:1, and the viscosity (mixed viscosity) measured immediately after preparation of the curable composition (immediately after mixing) was approximately 111,100 cP.

[0230]

[0231] Example 7.

[0232] The main part was manufactured by mixing polyol (P), filler component (F), and urethane reaction catalyst (C) in the same weight ratio as in Example 1. In the above, the same polyol and urethane reaction catalyst as in Example 1 were used.

[0233] The above filler component was prepared by mixing fillers A1, H1, H2 and A2 of Example 1. The mixing ratio was 35:20:15:30 (A1:H1:A2:H2) by weight.

[0234] The weighted average particle size of the entire filler component was approximately 38.10 μm, the weighted average particle size of the spherical filler was approximately 55 μm, and the weighted average particle size of the non-spherical filler was approximately 21.20 μm. In addition, the weighted BET specific surface area of ​​the entire filler component was approximately 1.17 m 2 / g, and the weighted average BET surface area of ​​the old filler was about 0.11 m 2 / g, and the weighted average BET surface area of ​​the non-spherical filler was approximately 2.23 m 2 It was around / g.

[0235] The viscosity of the subject part manufactured in this way was approximately 324,100 cP.

[0236] In addition, a curable composition was prepared by mixing the above-mentioned subject part with the curing agent part of Example 1 in a volume ratio of 1:1, and the viscosity (mixed viscosity) measured immediately after preparation of the curable composition (immediately after mixing) was approximately 147,600 cP.

[0237]

[0238] Example 8.

[0239] The main part was manufactured by mixing polyol (P), filler component (F), and urethane reaction catalyst (C) in the same weight ratio as in Example 1. In the above, the same polyol and urethane reaction catalyst as in Example 1 were used.

[0240] The above filler component was prepared by mixing fillers A1, H1, H2 and A2 of Example 1. The mixing ratio was 35:20:10:35 (A1:H1:A2:H2) by weight.

[0241] The weighted average particle size of the entire filler component was approximately 37.20 μm, the weighted average particle size of the spherical filler was approximately 58.89 μm, and the weighted average particle size of the non-spherical filler was approximately 19.45 μm. In addition, the weighted BET specific surface area of ​​the entire filler component was approximately 1.34 m 2 / g, and the weighted average BET surface area of ​​the old filler was about 0.11 m 2 / g, and the weighted average BET surface area of ​​the non-spherical filler was approximately 2.35 m 2 It was around / g.

[0242] The viscosity of the subject part manufactured in this way was approximately 314,200 cP.

[0243] In addition, a curable composition was prepared by mixing the above-mentioned subject part with the curing agent part of Example 1 in a volume ratio of 1:1, and the viscosity (mixed viscosity) measured immediately after preparation of the curable composition (immediately after mixing) was approximately 128,600 cP.

[0244]

[0245] Example 9.

[0246] The main part was manufactured by mixing polyol (P), filler component (F), and urethane reaction catalyst (C) in the same weight ratio as in Example 1. In the above, the same polyol and urethane reaction catalyst as in Example 1 were used.

[0247] The above filler component was prepared by mixing fillers A1, H1, H2, and A2 of Example 1. The mixing ratio was 30:20:15:35 (A1:H1:A2:H2) by weight.

[0248] The weighted average particle size of the entire filler component was approximately 34.70 μm, the weighted average particle size of the spherical filler was approximately 53.33 μm, and the weighted average particle size of the non-spherical filler was approximately 19.45 μm. In addition, the weighted BET specific surface area of ​​the entire filler component was approximately 1.34 m 2 / g, and the weighted average BET surface area of ​​the old filler was about 0.11 m 2 / g, and the weighted average BET surface area of ​​the non-spherical filler was approximately 2.35 m 2 It was around / g.

[0249] The viscosity of the subject part manufactured in this way was approximately 317,500 cP.

[0250] In addition, a curable composition was prepared by mixing the above-mentioned subject part with the curing agent part of Example 1 in a volume ratio of 1:1, and the viscosity (mixed viscosity) measured immediately after preparation of the curable composition (immediately after mixing) was approximately 125,400 cP.

[0251]

[0252] The viscosity of the subject and curing agent parts of each of the above examples, the mixed viscosity, thermal conductivity, and volume resistivity are summarized and described in Table 1 below. In Table 1 below, the unit of viscosity is cP, and the unit of volume resistivity is ×10 12 Ω·cm, and the unit of thermal conductivity is W / mK.

[0253] Viscosity (subject) Viscosity (hardener) Mixed viscosity Thermal conductivity Conductivity Volume resistance Example 1333, 400195, 100104, 8003.22.99 Example 2321, 600195, 100860, 703.15.55 Example 3343, 300195, 100192, 1003.53.94 Example 4375, 700195, 100177, 8003.33.19 Example 5374, 400195, 100239, 7003.03.46 Example 6375, 700195, 100111, 1003.33.94 Example 7324, 100195, 100147, 6003.23.40 Example 8314, 200195, 100128, 6003.14.27 Example 9317, 500195, 100125, 4003.24.92

Claims

1. Subject part containing subject resin and filler components; and Contains a hardener part containing a hardener and a filler component, Satisfies the following equation 1, The viscosity V of the following equation 1 M A curable composition having a viscosity of 70,000 cP or more: [Formula 1] 0.5 × (V R +V C ) > V M V in Equation 1 R is the viscosity of the above subject part, and V C is the viscosity of the above hardener part, and V M is the mixing viscosity of the above-mentioned subject matter and hardener part in a 1:1 volume ratio.

2. In the first paragraph, 0.5×(V in Equation 1 R +V C ) and V M A curable composition having a difference in the range of 20,000 to 300,000 cP.

3. In the first paragraph, V of formula 1 R And V C Difference of (V R -V C ) A curable composition having a viscosity of 50,000 cP or more.

4. Subject part containing subject resin and filler components; and Contains a hardener part containing a hardener and a filler component, A curable composition having △D of the following formula 2 within a range of 30 to 500: [Formula 2] △D = 100×D C / D R D in equation 2 R is the weighted average particle size of the filler component of the subject part, and D C is the weighted average particle size of the filler component in the hardener part.

5. A curable composition forming a cured layer having a thermal conductivity of 2.9 W / mK or more according to claim 1 or 4.

6. In the first or fourth paragraph, the volume resistance is 1.0×10 11 A curable composition that forms a cured layer having a thickness of Ω·cm or greater.

7. In the first paragraph, a curable composition in which △D of the following formula 2 is within a range of 30 to 500: [Formula 2] △D = 100×D C / D R D in equation 2 R is the weighted average particle size of the filler component of the subject part, and D C is the weighted average particle size of the filler component in the hardener part.

8. A curable composition according to claim 1 or claim 7, wherein △B of the following formula 3 is within a range of 10 to 500: [Formula 3] △B = 100×B R / B C B in equation 3 R is the weighted BET surface area of ​​the filler component of the subject part, and B C is the weighted average BET surface area of ​​the filler component in the curing agent part.

9. In clause 4 or clause 7, the weighted average particle size D of the filler component of the subject part R A curable composition having a particle size within a range of 15 μm to 100 μm.

10. In clause 8, the weighted BET surface area B of the filler component of the subject part R This 0.2 m 2 / g to 3 m 2 A curable composition within the range of / g.

11. A curable composition according to claim 4 or 7, wherein each of the filler components of the subject and hardener parts is composed of a spherical filler and a non-spherical filler.

12. In clause 11, △D of the following formula 4 S A curable composition having an viscosity within the range of 30 to 500: [Formula 4] △D S = 100×D CS / D RS D in equation 4 RS is the weighted average particle size of the spherical filler of the filler component of the subject part, and D CS is the weighted average particle size of the spherical filler of the filler component of the hardener part.

13. In the 12th paragraph, △D of the following formula 4 A A curable composition having an viscosity within the range of 0.5 to 300: [Formula 4] △D A = 100×D CA / D RA D in equation 4 RA is the weighted average particle size of the non-spherical filler of the filler component of the subject part, and D CA is the weighted average particle size of the non-spherical filler component of the hardener part.

14. In the 11th paragraph, △B of the following formula 3 S A curable composition having a viscosity within the range of 50 to 500: [Formula 3] △B S = 100×B RS / B CS B in equation 3 RS is the weighted BET surface area of ​​the spherical filler of the filler component of the subject part, and B C is the weighted average BET surface area of ​​the spherical filler component of the hardener part.

15. In clause 14, △B of the following formula 3 A A curable composition having an viscosity within the range of 20 to 400: [Formula 3] △B A = 100×B RA / B CA B in equation 3 RA is the weighted BET surface area of ​​the non-spherical filler of the filler component of the subject part, and B CA is the weighted average BET surface area of ​​the non-spherical filler component of the hardener part.

16. A heating component; and a material in contact with the heating component, The above material is a product comprising the curable composition of claim 1 or claim 4 or a cured product thereof.

17. A product according to claim 16, wherein the heat-generating component is a battery cell, a battery module or a battery pack.