KR20190106367A - Composition for potting material - Google Patents

Abstract

An embodiment can provide a composition for a potting material having a low glass transition temperature and having excellent hydrolysis resistance and thermal durability, a potting material comprising a cured product thereof, and an electronic device component including the potting material. The composition for a potting material comprises: a first fluid comprising a first polyol component and a second polyol component; and a second fluid comprising an isocyanate component.

Description

Potting material composition {COMPOSITION FOR POTTING MATERIAL}

The present invention relates to a composition for potting materials having a low glass transition temperature and having excellent hydrolysis resistance and thermal durability, a potting material prepared therefrom, and an electronic device component including the potting material.

Recently, due to the smartization of the device, the use of electric and electronic device parts such as sensors is rapidly increasing in various fields, and in particular, in the case of transportation equipment, various electric and electronic device parts are used due to the demand for safety, driving control and convenience improvement. have.

However, electrical and electronic devices used in the field of transportation equipment may cause malfunctions due to shock or dust caused by harsh external environment, and electrical and electronic devices may be damaged due to various internal environments such as heat generated from parts and engines of the transportation equipment itself. Melting may occur.

In general, such electrical and electronic device components are made of a case for protecting the electronic device to protect the core electronic device from the external environment and the internal environment, and injected or filled / potted with a liquid potting material inside the case to cure the external There are many cases of protection from enemy factors. Since the potting material is used as part of the electrical and electronic device parts, the durability of the potting material affects the durability of the electrical and electronic device. Therefore, the quality of the potting material is very important.

Conventionally, such a potting material used a potting material containing an epoxy resin, epoxy resin used for the purpose of reducing the cost and improving mechanical properties is very vulnerable to cracks due to external impact because the glass transition temperature is high. The potting material including the epoxy resin easily deforms as it is exposed to a harsh external environment, and cracks are formed on the surface of the potting material, and moisture or foreign matter penetrates between the cracks, which may cause breakdown of electric and electronic device components.

In addition, the conventional potting material used a silica filler in order to improve the heat resistance and thermal shock characteristics, in this case, the physical properties of the epoxy resin is improved, but the viscosity of the epoxy resin increases due to the filler, thereby causing the electrical and electronic device components Porosity may occur in the inner wall and the like, which may cause quality problems.

One embodiment is to provide a composition for potting material having a low glass transition temperature, improving the viscosity to improve workability, and at the same time having excellent hydrolysis resistance and thermal durability.

In addition, another embodiment is to provide a potting material prepared from the composition for the potting material and an electronic device component including the potting material.

In order to achieve the above object, one embodiment comprises a first liquid comprising a first polyol component and a second polyol component; And a second liquid comprising an isocyanate component; wherein the first polyol component comprises a silicone polyol, and the second polyol component is a group consisting of polyether polyol, polycarbonate polyol, polyester polyol, and polyacryl polyol It includes at least one selected from, the number average molecular weight of the silicone polyol is less than 10,000, to provide a composition for potting material.

In addition, another embodiment provides a potting material comprising a cured product of the composition for potting material.

Furthermore, another embodiment provides an electronic device component including the potting material.

Potting material composition according to the embodiment has a low glass transition temperature, the viscosity is improved to improve the workability.

In addition, the composition for potting material according to the embodiment has excellent hydrolysis resistance and thermal durability at the same time.

The potting material including the cured product of the composition for potting material and the electronic device part including the potting material do not easily deform when exposed to harsh external environment and are excellent in durability.

Hereinafter, the present invention will be described in detail through embodiments. The embodiments are not limited to the contents disclosed below and may be modified in various forms as long as the gist of the invention is not changed.

"Including" in the present specification means that it may further include other components unless otherwise specified.

In addition, all numbers and expressions indicating amounts of components, reaction conditions, and the like described herein are to be understood as being modified in all instances by the term "about" unless otherwise specified.

In the present specification, terms such as first and second are used to describe various components, and the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component into another.

One embodiment provides a composition for potting materials having a low glass transition temperature, excellent hydrolysis resistance and thermal durability.

Potting material composition according to one embodiment comprises a first liquid and a second liquid.

The composition for potting materials is a composition for two-component potting materials.

The composition for potting material is a solventless type.

The first liquid includes a first polyol component and a second polyol component.

The first polyol component and the second polyol component have hydroxy groups at their ends.

The first polyol component comprises a silicone polyol. In addition, the first polyol component may be made of a silicone polyol.

The number average molecular weight of the silicone polyol is less than 10,000. Specifically, the number average molecular weight of the silicone polyol is 50 to 8,000. For example, the number average molecular weight of the silicone polyol may be 50 to 7,500, 50 to 5,000, 100 to 5,000, 500 to 5,000, 500 to 3,000, 1,000 to 3,000 or 1,500 to 2,500, but is not limited thereto.

The hydroxyl value (OH number) of the silicone polyol is 11.2 to 280 mgKOH / g. Specifically, the hydroxyl value (OH number) of the silicone polyol may be 30 to 150 mgKOH / g or 37.4 to 112.2 mgKOH / g, but is not limited thereto.

The content of the silicone polyol is 3 to 15% by weight based on the total weight of the first liquid. For example, the content of the silicone polyol may be 5 to 15% by weight, 7 to 13% by weight or 8 to 12% by weight, but is not limited thereto.

When the content of the silicone polyol is in the above range, it is easy to have good adhesion and at the same time obtain good results in heat resistance evaluation and cold resistance evaluation.

The second polyol component includes polyol components other than the silica polyol.

Specifically, the second polyol component includes at least one selected from the group consisting of polyether polyols, polycarbonate polyols, polyester polyols, and polyacryl polyols. In addition, it is advantageous in terms of durability and workability that the second polyol component includes at least one selected from the group consisting of polyether polyols and polycarbonate polyols.

Examples of the polyether polyol include oxirane compounds such as ethylene oxide, propylene oxide, butylene oxide, tetrahydrofuran, water, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, 1, 6-hexanediol, neopentylglycol, 1,4-butylene glycol, 1,4-cyclohexanedimethanol, trimetholpropane, glycerin, 1,9-nonanediol, 3-methyl-1,5-pentanediol Reactants obtained by superposing | polymerizing low molecular weight polyhydric alcohols, such as these, etc. are mentioned.

Examples of the polycarbonate polyol include reactants obtained by the reaction of the low molecular polyhydric alcohol with dimethyl carbonate, diphenyl carbonate, diethylene carbonate, phosgene, and the like.

The polyester polyol may be, for example, a polycondensate obtained by esterification of a dibasic acid with the low molecular polyhydric alcohol, a caprolactone polymer obtained by using the low molecular polyhydric alcohol as an initiator, a valerolactone polymer, a methyl valerolactone polymer, or lactic acid. A polymer, a cracked fat-dispersion polymer, etc. are mentioned. Furthermore, the reaction product of the hydroxyl group and acid anhydride in the said polycondensate etc. are mentioned. Examples of the dibasic acid include, but are not limited to, adipic acid, isophthalic acid, terephthalic acid, maleic acid, fumaric acid, succinic acid, oxalic acid, malonic acid, pimelic acid, azelaic acid, sebacic acid, suberic acid, glutaric acid, 1, 4-cyclohexyl dicarboxylic acid, dimer acid, hydrogenated dimer acid, etc. are mentioned. Examples of the acid anhydride include, but are not limited to, phthalic anhydride, trimellitic anhydride, and trimellitic anhydride anhydride other than pyromellitic anhydride.

The said polyacryl polyol can mention the copolymer of the hydroxyl-containing mono (meth) acrylate monomer and the mono (meth) acrylate monomer which does not contain a hydroxyl group, for example.

The hydroxyl group-containing mono (meth) acrylate monomer refers to a monomer containing one (meth) acryloyl group and one or more hydroxyl groups in one molecule, and is obtained by the reaction of (meth) acrylic acid with a dihydric or higher alcohol. (Meth) acrylate monomers, (epsilon) -caprolactone modified (meth) acrylate monomers, etc. are mentioned. As a hydroxyl-containing mono (meth) acrylate monomer obtained from a dihydric alcohol, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, for example , 2-hydroxybutyl (meth) acrylate, 3-hydroxybutyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, (poly) ethylene glycol (meth) acrylate, and the like. 2,3-dihydroxypropyl (meth) acrylate etc. are mentioned as a hydroxyl-containing mono (meth) acrylate monomer obtained from a trivalent or more alcohol.

The mono (meth) acrylate monomer which does not contain a hydroxyl group can conventionally select a well-known radically polymerizable monomer suitably. For example, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, tert-butyl (meth) acrylate , Pentyl (meth) acrylate, hexyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, disyl (meth) acrylate, dode Thread (meth) acrylate, myristyl (meth) acrylate, palmityl (meth) acrylate, stearyl (meth) acrylate, etc. are mentioned.

In addition to the mono (meth) acrylate monomer, for example, a monomer having an ethylenically unsaturated bond having a carboxyl group, a monomer having an ethylenically unsaturated bond having an epoxy group, a monomer having an ethylenically unsaturated bond having an amino group, an isocyanato group (Meth) acrylamide, N-methyl (meth) acrylamide, N-methylol (meth) acrylamide, such as a monomer having an ethylenically unsaturated bond, such as a monomer having an ethylenically unsaturated bond ) Acrylamide, vinyl acetate, vinyl crotonate, styrene, acrylonitrile, etc. can also be used.

The second polyol component may be comprised of polyether polyols and polycarbonate polyols. Alternatively, the second polyol component may consist of a polyether polyol. Alternatively, the second polyol component may be made of polycarbonate polyol.

Specifically, the second polyol component may include polypropylene glycol. Alternatively, the second polyol component may be made of polypropylene glycol, but is not limited thereto.

In this case, the number average molecular weight of the polypropylene glycol is preferably 400 to 8,000. Specifically, the number average molecular weight of the polypropylene glycol may be 1,000 to 3,000, but is not limited thereto.

The hydroxyl value (OH number) of the polypropylene glycol is 14 to 280 mgKOH / g. Specifically, the hydroxyl value (OH number) of the polypropylene glycol may be 25 to 150 mgKOH / g or 35 to 112 mgKOH / g, but is not limited thereto.

The content of the second polyol component is 10 to 60% by weight based on the total weight of the first liquid. Specifically, the content of the second polyol component is 20 to 60% by weight, 25 to 55% by weight, 30 to 50% by weight, 25 to 48% by weight, 30 to 48% by weight based on the total weight of the second liquid , 30 to 45% by weight, 35 to 45% by weight or 37 to 43% by weight, but is not limited thereto.

When the content of the second polyol component is within the above range, appropriate reactivity can be obtained, and excellent mechanical properties such as elongation, tensile strength and surface hardness can be secured.

The weight ratio of the first polyol component and the second polyol component included in the first liquid is 1: 1 to 1:10. Specifically, the weight ratio of the first polyol component and the second polyol component included in the first liquid may be 1: 2 to 1: 6, 1: 3 to 1: 5.5, 1: 3.5 to 1: 5.5, or 1: 3.5 to 1: 4.5. More specifically, the weight ratio of the first polyol component and the second polyol component included in the first liquid may be 1: 4, but is not limited thereto.

By satisfying the above range, it is possible to have excellent adhesion and at the same time obtain good results in heat resistance evaluation and cold resistance evaluation and to secure an improved surface hardness.

The first liquid may further include one or more of fillers, catalysts, pigments and fluidity regulators.

The first liquid may further include a filler. At this time, the content of the filler is 10 to 30% by weight based on the total weight of the first liquid. Specifically, the content of the filler may be 10 to 20% by weight, 15 to 20% by weight based on the total weight of the first liquid, but is not limited thereto.

The filler is included in the potting material composition, thereby minimizing deformation that may occur when a sudden temperature change is applied to the product made of the potting material composition, and serves to improve mechanical properties.

The filler may be at least one selected from the group consisting of calcium carbonate, calcium magnesium carbonate, kaolin and talc. Specifically, the filler may be a mixture of calcium carbonate and calcium magnesium carbonate. Alternatively, the filler may be calcium carbonate.

When the filler is a mixture of calcium carbonate and calcium magnesium carbonate, the mixing ratio of calcium carbonate and calcium magnesium carbonate may be 1: 0.3 to 1: 3.

It is preferable that the diameter of the said filler is 10 micrometers or less. Specifically, the diameter of the filler may be 1 to 10 μm, 2 to 10 μm, 3 to 10 μm, or 5 to 10 μm, but is not limited thereto.

The first liquid may further include a catalyst. At this time, the content of the catalyst is 0.05 to 2% by weight based on the total weight of the first liquid. Specifically, the content of the catalyst may be 0.05 to 1% by weight, 0.05 to 0.5% by weight, 0.05 to 0.3% by weight, 0.08 to 0.12% by weight based on the total weight of the first liquid, but is not limited thereto. .

The catalyst is effective in controlling the activity of the reaction and the curing time of the composition.

The catalyst may be a known tertiary amine or organometallic compound.

As the tertiary amine, for example, triethylamine, tributylamine, dimethylbenzylamine, N-methyl morpholine, N-ethyl morpholine, N-cyclohexyl morpholine, N, N, N ', N'- Tetramethylethylenediamine, N, N, N ', N'-tetramethyl butanediamine, N, N, N', N'-tetramethyl hexanediamine, pentamethyl diethylene triamine, bis (dimethylaminopropyl) urea, 1,4-dimethylpiperazine, 1,2-dimethylimidazole, 1-azobicyclo [3.3.0] octane, 1,4-diazobicyclo [2.2.2] octane, alkanolamine compound, triethanolamine , Triisopropanolamine, N-methyl diethanol amine, N-ethyl diethanol amine, dimethylethanolamine, etc. are mentioned.

Moreover, as said organometallic compound, organic carboxylic acid tin (II) salts, such as tin (II) acetate, tin (II) octoate, tin (II) ethylhexanoate, and tin (II) laurate, dibutyl tin Organic carboxylic acid dialkyltin (IV) salts such as diacetate, dibutyltin dilaurate, dibutyl tin malate, dioctyl tin diacetate, dioctyl tin laurate, titanium tetraisopropoxide, titanium tetra Alkoxide organic titanium compounds, such as a normal butoxide, a titanium butoxide dimer, and a titanium tetra-2- etchherkisokiside, titanium diisopropoxy bis (acetylacetonate), titanium tetra acetylacetonate, and titanium di-2- Solvent type chelate organic titanium compounds, such as a chihekisokicibis (2-ethyl-3- hydrokihehekisokiside) and titanium diisopropoxy bis (ethylacetoacetate), titanium di Aqueous chelate organic titanium compounds, such as isopropoxy bis (triethanol aluminate), titanium lactate ammonium salt, titanium lactate, and titanium lactate, etc. are mentioned.

The catalyst may be an organometallic compound, specifically, tin laurate, but is not limited thereto.

The first liquid may further include a pigment. The content of the pigment is 0.1 to 10% by weight based on the total weight of the first liquid. Specifically, the content of the pigment may be 0.1 to 5% by weight, 0.1 to 3% by weight, 0.1 to 2% by weight, 0.5 to 1.5% by weight based on the total weight of the first liquid, but is not limited thereto. .

The pigment may impart black to a product made of the composition for potting material, thereby contributing to excellent thermal conductivity and insulation as well as prevention of deterioration and yellowing due to contamination of the appearance.

The pigment may be at least one selected from the group consisting of carbon black and graphite. Specifically, the pigment may be carbon black.

The first liquid may further include a fluidity regulator. The content of the rheology modifier is 20 to 40% by weight based on the total weight of the first liquid. Specifically, the content of the fluidity regulator may be 20 to 35% by weight, 25 to 35% by weight based on the total weight of the first liquid, but is not limited thereto.

The rheology modifier allows to impart elasticity to the first liquid and at the same time achieve low viscosity in the preparation of the composition. Therefore, it is preferable to use the fluidity modifier which does not have a hydroxyl group.

The fluidity modifiers include trimerate compounds such as phthalate ester compounds such as dioctyl phthalate, dipropylheptyl phthalate, diisononyl phthalate, diundecyl phthalate, triethylhexyl trimellitate, and triisodecyl trimellitate; Phosphate ester compounds such as tricresyl phosphate, trisksilenyl phosphate, cresyl diphenyl phosphate, xylenyl phosphate and triphenyl phosphate.

Specifically, the fluidity modifier may be a phthalic acid ester compound, more specifically, dioctylphthalate.

The second liquid contains an isocyanate component.

The isocyanate component is included in the second liquid, and the action thereof is not limited, but mainly crosslinking with hydroxyl groups in the polyol component to form a network-type crosslinked structure and imparting high elasticity and durability suitable for use as a composition for potting materials. Play a role.

The isocyanate component includes at least one member selected from the group consisting of aliphatic isocyanates, aromatic isocyanates, aromatic aliphatic isocyanates and alicyclic isocyanates.

Specifically, the isocyanate component may include an aromatic isocyanate and an aliphatic isocyanate component. More specifically, the isocyanate component may include an aliphatic isocyanate component. Alternatively, the isocyanate component may be composed of an aliphatic isocyanate component, but is not limited thereto.

The isocyanate component may be included in the form of polyisocyanate.

The isocyanate component may include polymeric methylene bis-4-phenylisocyanate (MDI), but is not limited thereto.

The aliphatic isocyanate is, for example, trimethylene diisocyanate, tetramethylene diisocyanate, hexamethylene diisocyanate, pentamethylene diisocyanate, 1,2-propylene diisocyanate, 2,3-butylene diisocyanate, 1,3-butyl Lene diisocyanate, dodecamethylene diisocyanate, 2,4,4-trimethylhexamethylene diisocyanate and the like.

The aromatic isocyanate may be, for example, 1,3-phenylene diisocyanate, 4,4'-diphenyl diisocyanate, 1,4-phenylene diisocyanate, 1,3,5-triisocyanate benzene and the like.

The aromatic aliphatic isocyanate means an aliphatic isocyanate having at least one aromatic ring in the molecule, for example, 4,4'-diphenylmethane diisocyanate (MDI), xylene diisocyanate (XDI), α, α, α ', Α'-tetramethyl xylene diisocyanate (TMXDI), 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 4,4'-triazine diisocyanate, 2,4,6-triisocyanate Toluene, dimethyldiphenylene diisocyanate (TOID), 4,4'-diphenylether diisocyanate, 4,4 ', 4 "-triphenylmethane triisocyanate and the like.

The alicyclic isocyanates include isophorone diisocyanate (IPDI), 1,3-cyclopentane diisocyanate, 1,3-cyclohexane diisocyanate, 1,4-cyclohexane diisocyanate, methyl-2,4-cyclohexane diisocyanate , Methyl-2,6-cyclohexane diisocyanate, 4,4'-methylenebis (cyclohexyl isocyanate), 1,4-bis (isocyanato methyl) cyclohexane and the like.

The content of the isocyanate component is 20 to 70% by weight based on the total weight of the second liquid. Specifically, the content of the isocyanate component may be 20 to 60% by weight, 20 to 50% by weight, 20 to 40% by weight or 25 to 35% by weight based on the total weight of the second liquid, but is not limited thereto. no.

When the content of the isocyanate component is in the above range, the crosslinking density is optimized to improve physical and chemical properties.

The second liquid may further include a fluidity regulator.

The amount of the fluidity regulator included in the second liquid is 30 to 80% by weight, 40 to 80% by weight, 50 to 80% by weight, 60 to 80% by weight or 65 to 75% by weight based on the total weight of the second liquid. It may be%, but is not limited thereto.

The rheology modifier allows to impart elasticity to the second liquid and at the same time achieve low viscosity in preparing the composition. Therefore, it is preferable to use the fluidity modifier which does not have a hydroxyl group.

The fluidity modifiers include trimerate compounds such as phthalate ester compounds such as dioctyl phthalate, dipropylheptyl phthalate, diisononyl phthalate, diundecyl phthalate, triethylhexyl trimellitate, and triisodecyl trimellitate; Phosphate ester compounds such as tricresyl phosphate, trisksilenyl phosphate, cresyl diphenyl phosphate, xylenyl phosphate and triphenyl phosphate.

Specifically, the fluidity modifier may be a phthalic acid ester compound, more specifically, dioctylphthalate.

The fluidity regulator included in the second liquid may be the same as or different from the fluidity regulator included in the first liquid.

The potting material composition is prepared by mixing the first liquid and the second liquid.

At this time, the weight ratio of the first liquid and the second liquid contained in the composition for the potting material is 100: 10 to 100: 30. Specifically, the weight ratio of the first liquid and the second liquid included in the composition for the potting material may be 100: 15 to 100: 25, but is not limited thereto.

In addition, the viscosity of the first liquid is 500 to 10,000 cps at room temperature. Specifically, the viscosity of the first liquid may be 1,000 to 5,000 cps or 1,000 to 3,000 cps at room temperature, but is not limited thereto.

The viscosity of the second liquid is 10 to 1,000 cps at room temperature. Specifically, the viscosity of the second liquid may be 50 to 500 cps or 100 to 200 cps at room temperature, but is not limited thereto.

Various properties of the above-described composition for potting material and components of the potting material composition may be combined.

The potting material composition may be cured by heating at 40 to 80 ° C. for 8 to 24 hours, and left at room temperature for 12 to 48 hours to form a cured product of the potting material composition.

Potting material according to one embodiment includes a cured product of the composition for the potting material.

An electronic device component according to another embodiment includes the potting material.

Specifically, the electronic device component including the potting material may be an electronic device component for transportation equipment.

The above content is described in more detail by the following examples. However, the following examples are only for illustrating the present invention, and the scope of the examples is not limited thereto.

EXAMPLE

Production Example  One: Of the first sum  Produce

The components of group 1 were stirred for 2 hours at 25 ° C. under a nitrogen atmosphere according to the weight ratios shown in Table 1 below until clear. Thereafter, the first group was added at a high speed of stirring at 3,000 rpm and the components of the two groups were divided into several times over 1 hour, and then sequentially added. When the particle size was 100 μm or less, the stirring speed was lowered to 500 rpm. Three groups of ingredients were added at one time. After stirring for 1 hour, the mixture was aged at a place where light was blocked for 24 hours at 25 ° C. to finally prepare 1 liquid (1-1 to 1-4).

First amount 1-1 1-2 1-3 1-4 Group 1 Polypropylene glycol 50 48 40 30 Silicone polyols 0 2 10 20 Group 2 Filler-Calcium Carbonate 19 19 19 19 Pigment-Carbon Black 0.9 0.9 0.9 0.9 Group 3 Catalyst-tin laurate 0.1 0.1 0.1 0.1 Rheology modifier-dioctylphthalate 30 30 30 30 Total (weight part) 100 100 100 100

Production Example  2: Of the second sum  Produce

30 wt% of polymeric MDI and 70 wt% of dioctylphthalate were stirred at 25 ° C. for 2 hours under a nitrogen atmosphere to prepare a second liquid. Thereafter, the mixture was aged at a place where light was blocked for 48 hours at 25 ° C. to finally prepare 2 solution (2-1).

Production Example  3: For potting materials  Preparation of the composition

The first liquid was added to a reactor prepared with a weight ratio of the first liquid prepared in Preparation Example 1 and the second liquid prepared in Preparation Example 2 to 100: 20, and then the second liquid was added thereto. Then, the composition for potting materials of Comparative Example 1 and Examples 1 to 3 described in Table 2 below was prepared by defoaming bubbles in the stock solution resulting from stirring after completion of the stirring in a water at 25 ° C. under a nitrogen atmosphere.

Production Example  4: For potting materials  Of composition Cured product  Produce

The composition for potting material manufactured in manufacture example 3 was injected into the molding die of 130x130x3 mm, and the molding die of 30 mm of internal diameter, and 10 mm of height. Thereafter, the composition for potting material was heated at 60 ° C. for 16 hours, and then left to stand at room temperature for 1 day to cure.

Evaluation example

The physical properties of the test specimens of Comparative Example 1 and Examples 1 to 3 prepared in Preparation Examples 3 and 4 were measured using the following method, and the results are shown in Table 2.

Adhesion was measured by the JIS-K-5600-5-6 testing standards. It is the result based on the cross-cut method. The conditions were experimented by dividing into 10 rows (100 grids) at 1mm intervals each in width and length. Mounting Eyes / 100

Tensile strength : measured according to ISO 527-1 test standard.

Elongation : measured by ISO 527 test standard.

Surface hardness (Shore A) : measured by DIN 53505 test standard.

Heat resistance repetition : After repeating a total of 10 times, such as -18 ℃, 2 hours after 80 ℃, 2 hours, the surface degradation was evaluated. It measured by JIS-K5600-8 test standard.

Cold resistance : The surface degradation evaluation was performed after -18 degreeC and 72 hours. It measured by JIS-K5600-8DIN EN 12087 test standard.

Comparative Example 1 Example 1 Example 2 Example 3 First amount 1-1 1-2 1-3 1-4 Second amount 2-1 2-1 2-1 2-1 Adhesion 100/100 100/100 100/100 100/100 59/100 The tensile strength MPA 5.5 5.2 4.9 3.0 Elongation % 28.4 30.0 32.2 60.1 Surface hardness Shore a 85 83 80 43 Heat resistance evaluation Visual observation Bad Bad Good Good Cold resistance Visual observation Bad Bad Good Good

As can be seen in Table 2, Examples 1 to 3 was confirmed to be excellent overall in terms of adhesion, tensile strength, elongation, surface hardness, heat resistance evaluation and cold resistance compared to Comparative Example 1.

Claims (22)

A first liquid comprising a first polyol component and a second polyol component; And
A second liquid containing an isocyanate component;
The first polyol component comprises a silicone polyol,
The second polyol component comprises at least one selected from the group consisting of polyether polyols, polycarbonate polyols, polyester polyols and polyacrylic polyols,
The number average molecular weight of the silicone polyol is less than 10,000,
Potting material composition.
The method of claim 1,
The content of the silicone polyol is 3 to 15% by weight based on the total weight of the first liquid, the composition for potting material.
The method of claim 1,
The number average molecular weight of the silicone polyol is 50 to 5,000, the composition for potting material.
The method of claim 1,
The composition for potting material in which a 2nd polyol component contains a polyether polyol.
The method of claim 1,
The content of the second polyol component is 10 to 60% by weight based on the total weight of the first liquid, the composition for potting material.
The method of claim 1,
The weight ratio of the first polyol component and the second polyol component contained in the first liquid is 1: 1 to 10, the composition for potting material.
The method of claim 1,
The composition for potting materials, wherein the first liquid further comprises at least one of fillers, catalysts, pigments and rheology modifiers.
The method of claim 1,
The first liquid further comprises a filler,
The content of the filler is 10 to 30% by weight based on the total weight of the first liquid, the potting material composition.
The method of claim 1,
The first liquid further comprises a catalyst,
Potassium content of the catalyst is 0.05 to 2% by weight based on the total weight of the first liquid.
The method of claim 1,
The first liquid further comprises a pigment,
The content of the pigment is 0.1 to 10% by weight based on the total weight of the first liquid, the potting material composition.
The method of claim 1,
The first liquid further comprises a fluidity regulator,
The content of the fluidity regulator is 20 to 40% by weight based on the total weight of the first liquid, the potting material composition.
The method of claim 1,
The composition for potting materials, wherein the isocyanate component comprises at least one member selected from the group consisting of aliphatic isocyanates, aromatic isocyanates, aromatic aliphatic isocyanates and alicyclic isocyanates.
The method of claim 1,
The composition for potting materials in which the said isocyanate component contains an aromatic aliphatic isocyanate component.
The method of claim 1,
The content of the isocyanate component is 20 to 70% by weight based on the total weight of the second liquid, the potting composition.
The method of claim 1,
The composition for potting material, the said 2nd liquid further contains a fluidity regulator.
The method of claim 15,
The content of the fluidity regulator is 30 to 80% by weight based on the total weight of the second liquid, the composition for potting material.
The method of claim 1,
The viscosity of the first liquid is 500 to 10,000 cps at room temperature, the potting material composition.
The method of claim 1,
The viscosity of the second liquid is 10 to 1,000 cps at room temperature, the potting material composition.
The method of claim 1,
The weight ratio of the first liquid and the second liquid is 100: 10 to 100: 30, the composition for potting material.
The method of claim 1,
The potting material composition is a solvent-free type, the potting material composition.
Potting material containing the hardened | cured material of the composition for potting materials of Claim 1.
An electronic device component comprising the potting material of claim 21.