KR20120102223A - Silicone elastomer composition, silicone elastomer and silicone paste prepared using the same - Google Patents

Abstract

PURPOSE: A silicone elastomer composition, a silicon elastomer, and pastes are provided to have excellent glossiness, thixotropic property, and transparency, thereby capable of being used to body protection products, especially to medical products. CONSTITUTION: A silicone elastomer composition comprises: polysiloxane containing one or more silicon atoms combined with hydrogen; a crosslinking agent which is a (meth)acrylic compound, vinyl group-containing aromatic compound, or a mixture thereof; a diluent; and a hydrosilylation catalyst. The polysiloxane is one compound selected from chemical formula 1: R3SiO(R'2SiO)a(R"HSiO)bSiR3, chemical formula 2: HR2SiO(R'2SiO)aSiR2H and chemical formula 3: HR2SiO(R'2SiO)a(R"HSiO)bSiR2H, or a mixture thereof. In the chemical formulas, R, R' and R" is respectively C1-10 alkyl, a is respectively 0-1,000, and b is respectively 1-250.

Description

SILICONE ELASTOMER COMPOSITION, SILICONE ELASTOMER AND SILICONE PASTE PREPARED USING THE SAME

The present invention relates to silicone elastomer compositions, silicone elastomers and silicone pastes prepared using the same, and more particularly to (meth) acrylic compounds and / or vinyl group-containing aromatics with polysiloxanes containing silicon atoms bonded to hydrogen. By using the compound as a crosslinking agent, the present invention relates to silicone elastomer compositions, silicone elastomers and silicone pastes prepared using the same, which exhibit excellent glossiness and thixotropy and are particularly useful for body care products or medical supplies.

Silicone elastomer compositions or pastes are widely used for cosmetics and medical products and impart properties such as transparency, thixotropic property, and spreadability to the skin. Conventionally, in order to obtain a silicone elastomer composition, the ~ Si-H containing polysiloxane and the ~ Si-vinyl containing polysiloxane, diene, diene or en-phosphorus compound were crosslinked in the presence of a diluent. Crosslinking is carried out by hydrosilylation reactions under platinum catalysts, forming junctions of polymer strands in the three-dimensional network.

The crosslinking involves the addition of ˜Si—H cross-multiplexes, ie the reaction of ˜Si—H + CH ₂ ═CH—R to ˜Si—CH ₂ CH ₂ —R, which is characterized by: 1) no byproducts It is an addition reaction that is not formed, and 2) the crosslinking position and the network structure can be defined in detail, and 3) the hydrosilylation reaction can proceed at room temperature to form a network.

In this regard, US Pat. No. 5,654,362 discloses R ¹ ₃ SiO (R ² ₂ SiO) _a (R ³ HSiO) _b SiR ¹ ₃ , HR ¹ ₂ SiO (R ² ₂ SiO) _c SiR ¹ ₂ H or HR ¹ ₂ Platinum catalysts include ~ Si-H-containing polysiloxanes of SiO (R ² ₂ SiO) _a (R ³ HSiO) _b SiR ¹ ₂ H; and α, ω-dienes of CH ₂ = CH (CH ₂ ) _n CH = CH ₂ ; ; And in the presence of a solvent, cross-linking ˜Si—H to α, ω-diene to form a gel, wherein R ¹ , R ² and R ^{3 are described.} Each independently represents a C _{1-6 -alkyl} group; a represents 0 to 250; b represents 1 to 250; c represents 1 to 250; n represents 1 to 20).

However, the silicone elastomer prepared by the above method does not have sufficient gloss and thixotropy required in the field of body care products, medical supplies, etc., and thus its use is greatly limited.

Therefore, the silicone paste which can satisfy the basic requirements of the silicone paste, such as stability and uniformity, and the gloss, thixotropy, and transparency required in the field of body protection products and medical supplies, and the silicone usable in the manufacture thereof It is time to develop the elastomeric composition.

U.S. Patent 5,654,362

The present invention is to solve the problems of the prior art as described above, it is excellent in glossiness, thixotropy and transparency, silicone elastomer composition that can be easily applied to the field of body protection products and medical supplies, prepared using the same It is a technical problem to provide a silicone elastomer and a silicon paste.

In order to achieve the above technical problem, the present invention (A) a polysiloxane containing one or more silicon atoms bonded to hydrogen; (B) a crosslinking agent which is a (meth) acryl compound, a vinyl group-containing aromatic compound, or a mixture thereof; (C) diluent; And (D) provides a silicone elastomer composition comprising a hydrosilylation catalyst.

In another aspect of the present invention, a silicone elastomer obtained by crosslinking the silicone elastomer composition until a gel is formed, a silicone paste obtained by applying a shear force after adding a second diluent to the silicone elastomer, and It provides a manufacturing method.

In still another aspect of the present invention, there is provided a body care product or a medical article produced by molding the silicone paste.

The silicone elastomer composition and the silicone elastomer and paste prepared therefrom are excellent in gloss and thixotropy, and can be particularly useful for body care products and medical supplies.

Hereinafter, after defining the terms used in the present specification, the present invention will be described in more detail.

In this specification, ~ Si-H represents a trivalent silicon atom bonded to hydrogen; (Meth) acrylic compound represents a methacryl compound or an acrylic compound; C _{1 -m} represents that the carbon number is 1 to m; Alkyl represents a straight, branched or cyclic monovalent saturated hydrocarbon radical. Aromatic compound refers to an aryl compound or heteroaryl compound, wherein aryl means a 6- to 10-membered hydrocarbon aromatic group including phenyl, naphthyl and the like, and heteroaryl is selected from the group consisting of nitrogen atom, oxygen atom and sulfur atom It means an aromatic 3- to 6-membered ring containing 1 to 2 at least one heteroatom selected. Non-limiting examples of heteroaryls include thiazole, oxazole, thiophene, furan, pyrrole, imidazole, isoxazole, pyrazole, triazole, thiadiazole, tetrazole, oxadiazole, pyridine, pyridazine, Pyrimidine, pyrazine, etc. are mentioned.

<Silicone Elastomer Composition>

(A) Polysiloxane

The polysiloxane (or "component (A)") included in the composition of the present invention is a component that forms a silicone elastomer through crosslinking with a crosslinking agent, which will be described later, and includes one or more silicon atoms (~ Si-H) bonded with hydrogen. It is to contain.

The polysiloxane which can be used can form a crosslink by following Reaction Scheme 1, and there is no particular limitation as long as it contains at least one of -Si-H, and can be freely selected from known polysiloxanes in consideration of the physical properties of the silicone elastomer or paste to be prepared. Can be.

[Reaction Scheme 1]

~ Si-H + CH ₂ = CH-R → ~ Si-CH ₂ CH ₂ -R

Preferably, as the polysiloxane, a compound of any one of the following Chemical Formulas 1 to 3, or a mixture thereof may be used.

[Formula 1]

R ₃ SiO (R ' ₂ SiO) _a (R "HSiO) _b SiR ₃

[Formula 2]

HR ₂ SiO (R ' ₂ SiO) _a SiR ₂ H

(3)

HR ₂ SiO (R ' ₂ SiO) _a (R "HSiO) _b SiR ₂ H

In the above Chemical Formulas 1 to 3, R, R 'and R "are each independently C _{1 -10-it} is to represent - (alkyl preferably C _{1 -5),} a is each independently from 0 to 1000 (preferably alkyl 0 to 400), b each independently represents 1 to 250 (preferably 1 to 130, more preferably 1 to 30), and the viscosity of the silicone elastomer or paste obtained when a is 0 to 1,000 It is suitably preferable in terms of product molding, and the crosslinking density of the silicone elastomer obtained when b is 1 to 250 is appropriate, which is suitable for preparing the paste.

In one embodiment, it is preferable to include the compound of Formula 1 as an essential component of the polysiloxane. In this case, even if the compound of Formula 1 is used alone, the reaction is possible to obtain the desired effect, but in order to vary the physical properties of the obtained silicone elastomer or paste, the compound of Formula 1 and the formula More preferably, a mixture of 2 and / or a compound of formula 3 is used. When the compound of Formula 1 and the compound of Formula 2 and / or Formula 3 are used in combination, the ratio between them may be arbitrarily selected in consideration of desired physical properties, and there is no particular limitation.

Preferably, the H molar equivalent ratio of (compound of Formula 1): (sum of compound of Formula 2 and compound of Formula 3) is 1: 0 to 1:20 (more preferably 1: 0 to 1: 5) Use to mix. Here, "H molar equivalent ratio 1: 0" means that the compound of Formula 1 is used alone. When the H molar equivalent ratio of the compound of Formula 1 to the sum of the compound of Formula 2 and the compound of Formula 3 is greater than 1:20, the degree of crosslinking may be lowered to obtain an elastomeric shape.

The crosslinking of the silicone elastomer composition according to the present invention is formed between the ~ Si-H group contained in the polysiloxane and the C = C group contained in the crosslinking agent, as can be seen from Scheme 1. Therefore, the degree of crosslinking of the silicone elastomer obtained from the silicone elastomer composition depends on the total amount of the ~ Si-H group and the C = C group and the molar equivalent ratio between them.

The total amount of the ˜Si—H group and the C═C group and the molar equivalent ratio between them are not particularly limited because they may be variously selected in consideration of the physical properties of the silicone elastomer or paste to be obtained. However, given the purpose of application in body care products and medical supplies, the preferred molar equivalent ratio C = C / ~ Si-H of the C = C group contained in the crosslinker component to the ~ Si-H group contained in the polysiloxane is 0.7-. 1.5, More preferably, it is 0.9-1.2. When C = C / ~ Si-H is less than 0.7, crosslinking is formed too densely, making it difficult to manufacture a silicone paste, or the uniformity and glossiness of the manufactured silicone paste may be reduced, and C = C / ~ Si-H When exceeds 1.5, the degree of crosslinking is lowered and the thixotropy may be lowered.

(B) Cross-linking agent

The crosslinking agent (or "component (B)") included in the composition of the present invention is a component that forms a silicone elastomer through crosslinking with the polysiloxane, and includes a (meth) acryl compound, a vinyl group-containing aromatic compound, or a It is made up of a mixture.

As the crosslinking agent, a (meth) acryl compound and a vinyl group-containing aromatic compound may be used alone or in combination of two or more kinds thereof. Any crosslinking agent may be used without particular limitation as long as it can form a crosslink by Scheme 1.

Preferably, the (meth) acryl compound is a compound represented by the following formula (4).

[Formula 4]

H ₂ C = CR ^a -C00-R ^b -R ^c

In Formula 4, R ^a represents hydrogen or a methyl group, and R ^b represents C _{1-10 -alkyl} group, R ^c represents an allyl group or (meth) acryl group.

In one embodiment, the (meth) acrylic compound is allyl (meth) acrylate; Methanedioldi (meth) acrylate, ethanedioldi (meth) acrylate, propanedioldi (meth) acrylate, butanedioldi (meth) acrylate, pentanedioldi (meth) acrylate, hexanedioldi (meth) acrylate, heptane diol di (meth) acrylate, octane diol di (meth) acrylate, furnace Nadi oldi (meth) C _{1 -15,} such as acrylate, decanediol di (meth) acrylate-alkanediol (meth) Acrylates; Or mixtures thereof.

Preferably, the vinyl group-containing aromatic compound is a compound represented by the following formula (5).

[Chemical Formula 5]

R ^d -AR ^d

In Formula 5, A represents a divalent aromatic group (eg, phenylene) or a heteroaromatic group, and R ^d each independently represents a vinyl group or an allyl group.

In one embodiment, as the vinyl group-containing aromatic compound, divinylbenzene, diallylbenzene, and other vinyl group-containing unsaturated aromatic compounds may be used alone or in combination of two or more thereof. When the vinyl group-containing aromatic compound is a 6-membered ring, all ortho-, meta- and para-forms may be used alone or in combination of two or more thereof.

In another embodiment, the crosslinking agent is unsaturated such as polyethylene glycol diacrylate, trimethylolpropane polyethylene glycol triacrylate, glyceryl triglycidyl ether, vinylcyclohexane oxide, bis-ethylene diglycidyl ether, bis-vinyl sulfone A compound can be used individually or in mixture of 2 or more types.

As described above, the preferred molar equivalent ratio C = C / -Si-H of the C = C group contained in the crosslinker component to the ~ Si-H group contained in the polysiloxane is 0.7-1.5, more preferably 0.9-1.2. . When C = C / ~ Si-H is less than 0.7, crosslinking is formed too densely, making it difficult to manufacture a silicone paste, or the uniformity and glossiness of the manufactured silicone paste may be reduced, and C = C / ~ Si-H When exceeds 1.5, the degree of crosslinking is lowered and the thixotropy may be lowered.

(C) diluent

Diluents (or “components (C)”) included in the compositions of the present invention are ingredients included to lower the concentration of the silicone elastomer composition to an appropriate level. The diluent, ie the diluent used in the preparation of the silicone elastomer, herein is also referred to as the first diluent (or "component (C1)"). For the sake of clarity, the diluents used to make the silicone pastes described below are referred to as second diluents (or "components (C2)").

In one embodiment, the first diluent may be a conventional inert solvent that is non-reactive or relatively non-reactive to the crosslinking reaction of the polysiloxane. For example, linear silicon; Cyclic silicones; Organic diluents such as organic oils and organic solvents; Or a mixture thereof may be used, but is not necessarily limited thereto.

Examples of linear silicon include compounds represented by the formula Me ₃ SiO (Me ₂ SiO) _× SiMe ₃ ; Examples of cyclic silicones include compounds represented by the formula (Me ₂ SiO) _y . Wherein x is 0-80, preferably 0-20; y is 1-9, Preferably 5-6.

In the case of linear silicon represented by Me ₃ SiO (Me ₂ SiO) _x SiMe ₃ , when x exceeds 80, the viscosity is too high and the dilution force may decrease. On the other hand, the preferred kinematic viscosity of the silicone-based diluent is 0.65 ~ 100 cSt (mm ² / s).

Examples of organic diluents include aromatic hydrocarbons such as benzene, toluene, ethylbenzene and xylene; Aliphatic hydrocarbons such as pentane, cyclohexane, heptane, VM & P solvent and mineral spirits; Alcohols such as methanol, ethanol, propanol, isopropanol, cyclohexanol, benzyl alcohol, octanol, ethylene glycol, propylene glycol and glycerol; Alkyl halides or aryl halides such as chloroform, carbon tetrachloride (carbon tetrachloride), perchloroethylene, ethyl chloride and chlorobenzene; Aldehydes; Ketones such as acetone, methyl ethyl ketone, cyclohexanone, diacetone alcohol, methyl amyl ketone and diisobutyl ketone; Esters such as ethyl acetate, isopropyl acetate and ethyl acetoacetate; And ethers such as ethyl ether, butyl ether, tetrahydrofuran or 1, 4-dioxane. The organic diluent may be a single compound or a mixture of compounds, or may be used in admixture with siloxanes.

The preferred content of the first diluent component (C1) is 30 to 95 parts by weight, more preferably 50 to 90 parts by weight, based on 100 parts by weight of the polysiloxane component (A) + crosslinker component (B) + 100 parts by weight of the first diluent component (C1). to be. If the content is less than 30 parts by weight with respect to 100 parts by weight of (A) + (B) + (C1), it may not be possible to obtain a uniform silicone elastomer. If the content is more than 95 parts by weight, the silicone elastomer may have thixotropic or gloss Physical properties may be reduced.

(D) Hydrosilylation  catalyst

The hydrosilylation catalyst included in the composition of the present invention is a component used to promote crosslinking and curing between the ~ Si-H group and the C = C group.

As the hydrosilylation catalyst, a known catalyst known to be able to form a crosslink between the ˜Si—H group and the C═C group may be used without particular limitation.

Preferably, a platinum-based catalyst which is a Group 8 transition metal is used as the hydrosilylation catalyst. In one embodiment, a platinum catalyst may be used a Karstedt catalyst (Pt (CH ₂ = CHMe ₂ Si) ₂ O), such as the custard catalyst described in US Pat. No. 3,715,334. The custard catalyst is typically a platinum divinyl tetramethyl disiloxane catalyst containing about 1% by weight platinum in a solvent such as toluene.

The preferred content of the hydrosilylation catalyst is 0.0001 to 0.01 parts by weight, more preferably 0.0005 to 0.002 parts by weight based on 100 parts by weight of the polysiloxane component (A) + crosslinker component (B). If the content is less than 0.0001 parts by weight with respect to 100 parts by weight of (A) + (B), the reaction itself may not occur, and if it exceeds 0.01 parts by weight, it may act as an impurity in the silicone elastomer to darken the color.

The silicone elastomer composition of the present invention may further include additives generally used in the manufacture of silicone elastomers within a range not departing from the object. For example, fragrances, surfactants, natural oils, fillers, pigments, heat resistant additives, flame retardants, curing inhibitors and the like may be added in an appropriate amount depending on the application.

<Silicone elastomer>

According to another aspect of the present invention, there is provided a silicone elastomer obtained by crosslinking a silicone elastomer composition of the present invention as described above until a gel is formed.

Specifically, the silicone elastomer of the present invention can be obtained by reacting a mixture of polysiloxane (A) and a crosslinking agent (B) until a gel is formed in the presence of a first diluent (C1) and a hydrosilylation catalyst (D). .

The reaction may be carried out at room temperature, but the reaction is preferably carried out at a temperature range of 30 to 120 ℃, more preferably 50 to 80 ℃ to promote the process.

<Silicone paste>

According to another aspect of the present invention, there is provided a silicone paste obtained by adding a second diluent to the silicone elastomer of the present invention as described above and then applying shear force.

Specifically, the silicone paste of the present invention is (a) a polysiloxane (A) containing at least one silicon atom bonded to hydrogen, and a crosslinking agent (B) which is a (meth) acryl compound, a vinyl group-containing aromatic compound, or a mixture thereof. ) Crosslinking to obtain a silicone elastomer in the presence of a first diluent (C1) and a hydrosilylation catalyst (D) until a gel is formed, and (b) adding a second diluent (C2) to the silicone elastomer. After that, it is manufactured through a step of applying a shear force.

As described above, the preferred content of the first diluent is 30 to 95 parts by weight, more preferably 50 to 90 parts by weight, based on 100 parts by weight of polysiloxane (A) + crosslinker (B) + first diluent (C1).

As the second diluent, the same compounds as exemplified as the first diluent usable above can be used in the same manner. The preferred content of the second diluent is 50 to 90 parts by weight, more preferably 60 to 80 parts by weight, relative to 100 parts by weight of the first diluent (C1) + second diluent (C2). If the content is less than 50 parts by weight or more than 90 parts by weight with respect to 100 parts by weight of (C1) + (C2), a uniform silicone paste may not be obtained.

Applying the shear force to the silicone elastomer can be carried out using conventional shearing apparatus. For example, a shear device such as a two-stage roll mill, a three-stage roll mill, a colloid mill, a batch mixer, a linkage mixer, and a homogenizer may be used alone or in combination of two or more, but is not necessarily limited thereto.

The silicone paste according to the present invention may be suitably molded and used in various fields such as cosmetic articles, body care products, medical supplies, and the like, and may be particularly useful for body care products or medical supplies.

Hereinafter, the present invention will be described more specifically by way of examples. However, these examples are provided only for the understanding of the present invention, and the scope of the present invention is not limited to these examples in any sense.

Example

Example  One

192.3 g of polysiloxane, 7.7 g of 1,6-hexanediol diacrylate and polydimethylsiloxane (SF1000N-6cSt from KCC, kinematic viscosity) of the average structural formula Me ₃ SiO (Me ₂ SiO) ₂₀₄ (MeHSiO) ₅ SiMe ₃ 300 g of non-reactive polydimethylsiloxane, equal to or less than 6 cSt) were mixed in a tinplate can. Subsequently, 2 g of the custard catalyst containing 1% by weight of platinum (Pt) was added and mixed well and placed in an oven at 60 ° C. Gels formed within 1 hour and stabilized by standing for 3 hours. Next, 500 g of polydimethylsiloxane was added and swollen under shearing force to obtain a transparent uniform silicone paste having a viscosity (25 ° C.) of 30,000 cPs. (C = C / -Si-H of 1,6-hexanedioldiacrylate and polysiloxane was 1.1.)

Example  2

195.6 g of polysiloxane, 4.4 g of allyl methacrylate and 300 g of polydimethylsiloxane of the average structural formula Me ₃ SiO (Me ₂ SiO) ₂₀₄ (MeHSiO) ₅ SiMe ₃ were mixed in a tinplate can. Subsequently, 1 g of custard catalyst containing 1% by weight of platinum was added, mixed well, and placed in an oven at 60 ° C. Gels formed within 1 hour and stabilized by standing for 3 hours. Next, 500 g of polydimethylsiloxane was added and swelled under shear force to obtain a transparent uniform silicone paste having a viscosity (25 ° C.) of 35,000 cPs. (C = C / ~ Si-H of allyl methacrylate and polysiloxane was 1.1.)

Example  3

195.5 g of polysiloxane, 4.5 g of divinylbenzene and 300 g of polydimethylsiloxane of the average structural formula Me ₃ SiO (Me ₂ SiO) ₂₀₄ (MeHSiO) ₅ SiMe ₃ were mixed in a tinplate can. Next, 0.4 g of the custard catalyst containing 1% by weight of platinum was added and thoroughly mixed and placed in a 60 ° C. oven. Gels formed within 1 hour and stabilized by standing for 3 hours. 500 g of polydimethylsiloxane was added and swelled under shear force to obtain a transparent uniform silicone paste having a viscosity (25 ° C.) of 37,000 cPs. (C = C / -Si-H of divinylbenzene and polysiloxane was 1.1.)

Example  4

195.6 g of polysiloxane, 2.2 g of allyl methacrylate, 2.2 g of divinylbenzene and 300 g of polydimethylsiloxane of the average structural formula Me ₃ SiO (Me ₂ SiO) ₂₀₄ (MeHSiO) ₅ SiMe ₃ were mixed in a tinplate can. Subsequently, 1 g of custard catalyst containing 1% by weight of platinum was added, mixed well, and placed in an oven at 60 ° C. Gels formed within 1 hour and stabilized by standing for 3 hours. Next, 500 g of polydimethylsiloxane was added and swelled under shear force to obtain a transparent uniform silicone paste having a viscosity (25 ° C.) of 36,000 cPs. (The molar ratio of allyl methacrylate: divinylbenzene was 1: 1, and C = C / -Si-H of allyl methacrylate + divinylbenzene, and polysiloxane was 1.1.)

Comparative example

197.1 g of polysiloxane, 2.9 g of 1,5-hexadiene and 300 g of polydimethylsiloxane of the average structural formula Me ₃ SiO (Me ₂ SiO) ₂₀₄ (MeHSiO) ₅ SiMe ₃ were mixed in a tinplate can. Next, 0.4 g of the custard catalyst containing 1% by weight of platinum was added and thoroughly mixed and placed in a 60 ° C. oven. Gels formed within 1 hour and stabilized by standing for 3 hours. Next, 500 g of polydimethylsiloxane was added and swollen under shear force to obtain a transparent uniform silicone paste having a viscosity (25 ° C.) of 26,000 cPs. (C = C / -Si-H of 1,5-hexadiene and polysiloxane was 1.1.)

Property test

The physical properties of the silicone pastes obtained in Examples and Comparative Examples were evaluated as follows.

end. stability

The stability was evaluated by observing the uniformity of the silicon paste.

I. Chisso ( Thixo Index , TI )

It was evaluated by calculating TI = a / b from the viscosity a obtained at 5 rpm and the viscosity b obtained at 50 rpm using a Brookfield DVII + spindle 07 at 25 ° C.

All. Glossiness

The silicone pastes obtained in Examples and Comparative Examples were drawn on a glass plate with a thickness of 100 μm and evaluated visually. Evaluation criteria are as follows.

Very good: transparent and no tee

Good: transparent with some tee

Usually: slightly opaque

Poor: Opaque

The physical properties of the silicon paste evaluated by the above method are summarized in Table 1 below.

[Table 1]

As shown in Table 1, the silicon paste of the Example was uniform but excellent in both gloss and thixotropy, but the silicon paste of the comparative example was not.

Claims (17)

(A) a polysiloxane containing at least one silicon atom bonded to hydrogen;
(B) a crosslinking agent which is a (meth) acryl compound, a vinyl group-containing aromatic compound, or a mixture thereof;
(C) diluent; And
(D) hydrosilylation catalyst
Silicone elastomer composition comprising a. The silicone elastomer composition according to claim 1, wherein the polysiloxane component (A) is a compound of any one of the following formulas (1) to (3), or a mixture thereof:
[Formula 1]
R ₃ SiO (R ' ₂ SiO) _a (R "HSiO) _b SiR ₃
(2)
HR ₂ SiO (R ' ₂ SiO) _a SiR ₂ H
(3)
HR ₂ SiO (R ' ₂ SiO) _a (R "HSiO) _b SiR ₂ H
(In Chemical Formulas 1 to 3,
R, R 'and R "are each independently C _{1 -10} - represents alkyl,
a each independently represents 0 to 1,000,
b represents 1-250 each independently.) The silicone elastomer composition according to claim 2, wherein the H molar equivalent ratio of (compound of Formula 1): (sum of compound of Formula 2 and compound of Formula 3) is 1: 0 to 1:20. The silicone elastomer composition according to claim 1, wherein the (meth) acrylic compound is a compound represented by the following general formula (4):
[Chemical Formula 4]
H ₂ C = CR ^a -C00-R ^b -R ^c
(In Formula 4,
R ^a represents hydrogen or a methyl group,
R ^b is A C _{1-10 -alkyl} group,
R ^c represents an allyl group or a (meth) acryl group.) The method of claim 4, wherein the (meth) acrylic compounds are allyl (meth) acrylate, C _{1 -15} - alkanediol (meth) acrylate, or silicone elastomer composition, characterized in that a mixture thereof. 2. The silicone elastomer composition according to claim 1, wherein the vinyl group-containing aromatic compound is a compound of formula (5):
[Chemical Formula 5]
R ^d -AR ^d
(In Chemical Formula 5,
A represents a divalent aromatic group or heteroaromatic group,
R ^d each independently represents a vinyl group or an allyl group.) 7. The silicone elastomer composition according to claim 6, wherein the vinyl group-containing aromatic compound is divinylbenzene, diallylbenzene, or a mixture thereof. The crosslinking agent according to claim 1, wherein the crosslinking agent is selected from polyethylene glycol diacrylate, trimethylolpropane polyethylene glycol triacrylate, glyceryl triglycidyl ether, vinylcyclohexane oxide, bis-ethylene diglycidyl ether and bis-vinyl sulfone Silicone elastomer composition, characterized in that at least one. The molar equivalent ratio C = C / -Si-H of the C = C group contained in the crosslinking agent component (B) to the ~ Si-H group contained in the polysiloxane component (A) is 0.7-1.5. Silicone elastomer composition, characterized in that. The silicone elastomer composition according to claim 1, wherein the amount of the diluent component (C) is 30 to 95 parts by weight based on 100 parts by weight of the sum of the polysiloxane component (A), the crosslinker component (B), and the diluent component (C). . The silicone elastomer composition according to claim 1, wherein the hydrosilylation catalyst component (D) is a platinum catalyst. The silicone elastomer composition according to claim 1, wherein the amount of the hydrosilylation catalyst component (D) is 0.0001 to 0.01 part by weight based on 100 parts by weight of the total amount of the polysiloxane component (A) and the crosslinking agent component (B). A silicone elastomer obtained by crosslinking a silicone elastomer composition according to any one of claims 1 to 12 until a gel is formed. Silicone paste obtained by adding a second diluent to the silicone elastomer according to claim 13 and then applying shear force. (a) a polysiloxane containing at least one silicon atom bonded to hydrogen, and a crosslinking agent which is a (meth) acrylic compound, a vinyl group-containing aromatic compound, or a mixture thereof, wherein the gel is Crosslinking to form a silicone elastomer, and
(b) adding a second diluent to the silicone elastomer, and then applying shear force to the silicone elastomer. The method of claim 15, wherein the amount of the second diluent is 50 to 90 parts by weight based on 100 parts by weight of the sum of the first and second diluents. A body care product or medical article made by molding the silicone paste according to claim 14.