KR20160073591A - Silicone elastomer composite, silicone elastomer and silicone paste using the same - Google Patents

Abstract

The present invention relates to a silicone elastomer composition and a silicone elastomer and silicone paste prepared by using the composition. According to the present invention, the silicone elastomer has excellent gloss and compatibility as well as excellent usability to skin, wherein the silicone elastomer is prepared by performing a cross-linking reaction of the silicone elastomer composition including: a polysiloxane vinyl group containing one or more silicon to which hydrogen is bound; polysiloxane containing one or more; a first diluent; and a catalyst for hydrogenated silicon addition reaction. Also, the silicone paste including a second diluent and a catalyst inhibitor with the silicone elastomer has improved stability during storage and thus the silicone paste can be useful in a body protection product or cosmetic field.

Description

TECHNICAL FIELD [0001] The present invention relates to a silicone elastomer composition, a silicone elastomer and a silicone paste prepared using the silicone elastomer composition,

The present invention relates to a silicone elastomer composition, a silicone elastomer and a silicone paste produced using the silicone elastomer composition, and more particularly to a silicone elastomer composition comprising a siloxane containing at least one hydrogen-bonded silicon atom; Siloxanes containing at least one vinyl group; diluent; And a silicon hydride addition reaction catalyst, and a silicone elastomer and a silicone paste produced using the silicone elastomer composition.

The silicone elastomer can be prepared by subjecting a polysiloxane containing silicon-bonded hydrogen atoms to a crosslinking reaction in the presence of a crosslinking agent and a diluent. At this time, the crosslinking reaction forms a polysiloxane network through hydrosilylation using a platinum catalyst. By this mechanism, by-products are not formed at all, and the position of the crosslinking and the structure of the network can be clearly defined And can be reacted at room temperature.

As an example thereof, Patent Document 1 discloses a process for producing a silicone elastomer containing a hydrogen-bonded polysiloxane containing silicon atoms by using an unsaturated hydrocarbon and a platinum catalyst as a cross-linking agent to prepare α, ω-diene (α, ω- And the like.

However, the silicone elastomer produced according to Patent Document 1 has insufficient feeling on the skin, which is required for application to the field of body protection products or cosmetics, and can not satisfy physical properties such as gloss and compatibility, There is a problem that storage stability is deteriorated due to unreacted materials.

Accordingly, there is a desperate need to develop a silicone elastomer material having excellent luster and compatibility, improved storage stability, and a long shelf life, which can be used in the field of body protection products or cosmetics due to its excellent feeling on the skin.

U.S. Patent No. 5,654,362.

It is an object of the present invention to provide a silicone elastomer composition for producing a silicone elastomer not only excellent in feeling on the skin but also excellent in gloss and compatibility.

It is another object of the present invention to provide a silicone elastomer produced from the silicone elastomer composition.

It is still another object of the present invention to provide a silicon paste containing the silicone elastomer and having improved storage stability.

In order to achieve the above object,

The present invention, in one embodiment,

A polysiloxane containing at least one hydrogen-bonded silicon atom;

Polysiloxanes containing at least one vinyl group;

A first diluent; And

There is provided a silicone elastomer composition comprising a hydrogenation siliconation reaction catalyst.

In addition, the present invention, in one embodiment,

And is a crosslinking reaction product of the silicone elastomer composition, and provides a gel-like silicone elastomer.

Further, the present invention, in one embodiment,

A silicone elastomer, a second diluent, and a catalyst inhibitor.

According to the present invention, there are provided polysiloxane vinyl groups containing at least one hydrogen-bonded silicon; At least one polysiloxane; The silicone elastomer produced by performing the crosslinking reaction of the silicone elastomer composition comprising the first diluent and the hydrogenation siliconation reaction catalyst is excellent in feeling upon application to the skin. In addition, the silicon paste containing the second diluent and the catalyst inhibitor together with the silicone elastomer has improved storage stability, and thus can be usefully used in the field of body protection products or cosmetics.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the present invention, the terms "comprises," "comprising," or "comprising ", when used in this specification, designate the presence of stated features, integers, Steps, operations, elements, components, or combinations of elements, numbers, steps, operations, components, parts, or combinations thereof.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

Hereinafter, the present invention will be described in detail with reference to the drawings, and the same or corresponding components are denoted by the same reference numerals regardless of the reference numerals, and a duplicate description thereof will be omitted.

In the present invention, the term "alkyl" means a functional group derived from a saturated hydrocarbon in a linear or branched form.

The term "alkyl" as used herein includes, for example, methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, nonyl, docecyl and the like.

The present invention provides a silicone elastomer composition excellent in feeling on the skin, excellent in gloss and compatibility, and a silicone paste prepared using the silicone elastomer composition and having improved storage stability.

The silicone elastomer can be prepared by subjecting a polysiloxane containing silicon-bonded hydrogen atoms to a crosslinking reaction in the presence of a crosslinking agent and a diluent. At this time, the crosslinking reaction forms a polysiloxane network through hydrosilylation using a platinum catalyst. By this mechanism, by-products are not formed at all, and the position of the crosslinking and the structure of the network can be clearly defined And can be reacted at room temperature. However, the silicone elastomers developed by using the crosslinking reaction have insufficient feeling on the skin required for application to the field of body protection products or cosmetics, fail to satisfy physical properties such as gloss and compatibility, There is a problem that the storage stability is deteriorated due to the unreacted material remaining in the resin.

In order to overcome these problems, the present invention relates to a polysiloxane containing at least one hydrogen-bonded silicon atom; Polysiloxanes containing at least one vinyl group; A first diluent; And a silicon hydride addition reaction catalyst, and a silicone elastomer and a silicon paste produced using the silicone elastomer composition.

According to the present invention, there are provided polysiloxane vinyl groups containing at least one hydrogen-bonded silicon; At least one polysiloxane; The silicone elastomer produced by performing the crosslinking reaction of the silicone elastomer composition comprising the first diluent and the hydrogenation siliconation catalyst has excellent gloss and compatibility as well as excellent feeling on the skin. In addition, the silicon paste containing the second diluent and the catalyst inhibitor together with the silicone elastomer has improved storage stability, and thus can be usefully used in the field of body protection products or cosmetics.

Hereinafter, the present invention will be described in detail.

The present invention, in one embodiment,

A polysiloxane containing at least one hydrogen-bonded silicon atom;

Polysiloxanes containing at least one vinyl group;

A first diluent; And

There is provided a silicone elastomer composition comprising a hydrogenation siliconation reaction catalyst.

First, in the silicone elastomer composition according to the present invention, the polysiloxane containing hydrogen-bonded silicon atoms is a basic component for forming a silicone elastomer, It can contain one or more atoms.

Here, the polysiloxane containing at least one hydrogen-bonded silicon atom according to the present invention may be any one or more of compounds represented by the following Chemical Formulas 1 to 3:

[Chemical 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 the above Chemical Formulas 1 to 3,

And R, R 'and R "are independently alkyl of C _{1 ~ 10} each other,

a is independently from 0 to 1,000,

and b are independently from 1 to 250 each other.

Specifically, in the above-mentioned Formulas 1 to 3, a silicone elastomer or paste manufactured within the above range has a suitable viscosity, so that product molding can be easily controlled, and b is a range in which a silicone elastomer or paste is applied It is possible to control the crosslinking density of the silicone elastomer required depending on the use of the product or the manufacturing process.

The polysiloxane containing at least one hydrogen-bonded silicon atom according to the present invention may contain a compound represented by the general formula (1) as a basic component of the polysiloxane. Here, the compound represented by the formula (1) may be used alone or in combination with any one or more compounds represented by the formula (2) and (3).

Specifically, for example, in consideration of the physical properties of the silicone elastomer, the compound represented by the formula (1) may be mixed with a mixture of the compound represented by the formula (2) and the compound represented by the formula (3).

Further, when the compound represented by the formula (1) is mixed with the mixture of the compound of the formula (2) and the compound of the formula (3) as the polysiloxane containing at least one hydrogen-bonded silicon atom according to the present invention, The mixing ratio of the compound and the mixture of the general formula (2) and the general formula (3) is not particularly limited within the range not affecting the gloss and compatibility of the silicone elastomer to be produced.

Specifically, for example, the molar ratio of the compound represented by the formula (1) to the silicon-bonded hydrogen atom and the molar equivalent of the compound represented by the formula (2) and the molar equivalent to the silicon-bonded hydrogen atom of the compound represented by the formula (3) Lt; / RTI > The polysiloxane containing at least one hydrogen-bonded silicon atom is mixed with the mixture of the compound represented by the formula (1), the compound represented by the formula (2) and the compound represented by the formula (3) at a ratio within the above range to effectively control the degree of crosslinking of the produced silicone elastomer So that the shape of the silicone elastomer can be easily obtained. In this case, when the ratio is 1: 0, it may mean that the compound represented by the formula (1) is used alone.

Next, in the silicone elastomer composition according to the present invention, the polysiloxane containing at least one of the vinyl groups serves as a crosslinking agent in the crosslinking for producing the silicone elastomer. At this time, the polysiloxane containing at least one vinyl group may be a compound represented by the following formula (4)

[Chemical Formula 4]

R ₂ C = CR'-SiO (R " ₂ SiO) _a Si-CR '= CR ₂

In Formula 4,

And R, R 'and R "are independently hydrogen or C alkyl of _{1 to 10} with each other,

a is independently from 0 to 1000;

Specifically, in Formula 4,

R, R 'and R "are independently from each other hydrogen, methyl, ethyl or propyl,

a may independently be 1 to 250 from each other.

More specifically, the polysiloxane containing at least one vinyl group according to the present invention may be a compound represented by the following formula (5) or (6)

[Chemical Formula 5]

H ₂ C = CH-SiO ((CH ₃ ) ₂ SiO) ₂₀ Si-CH = CH ₂

[Chemical Formula 6]

H ₂ C = CH-SiO ((CH ₃ ) ₂ SiO) ₇₀ Si-CH = CH ₂ .

On the other hand, since the crosslinking of the silicone elastomer composition according to the present invention is formed between the hydrogen-bonded silicon atoms contained in the polysiloxane and the vinyl group contained in the polysiloxane containing vinyl groups, the degree of crosslinking of the silicone elastomer obtained from the silicone elastomer composition The total amount of silicon atoms and vinyl groups to which hydrogen is bonded, and the molar equivalence ratio therebetween.

The ratio of the total amount of vinyl groups contained in the hydrogen-bonded silicon atom to the cross-linking agent and the molar equivalent ratio therebetween is not particularly limited and may be experimentally selected in consideration of the physical properties of the silicone elastomer or paste to be obtained. Specifically, for example, the molar equivalent ratio may be 0.6 to 1.5, more specifically 0.9 to 1.2, in view of the object of application to body protection products and medical supplies. If the molar equivalence ratio of the hydrogen-bonded silicon atom to the vinyl group contained in the cross-linking agent is less than 0.6, cross-linking is formed too tightly, which makes it difficult to produce a silicone paste, Uniformity and gloss may be lowered. When the molar equivalent ratio of the vinyl group exceeds 1.5, the degree of crosslinking is lowered and the plasticity may be lowered.

Next, in the silicone elastomer composition according to the present invention, the first diluent serves to adjust the concentration of the silicone elastomer composition. As the diluent applicable to the present invention, there may be mentioned a conventional silicone elastomer composition which does not affect the crosslinking reaction of polysiloxane Is not particularly limited and may be used. More specifically, for example, linear silicon; Cyclic silicon; Organic diluents such as organic oils and organic solvents may be used alone or in combination.

Here, the linear silicon may include a compound represented by (CH ₃ ) ₃ SiO ((CH ₃ ) ₂ SiO) _x Si (CH ₃ ) ₃ ; The cyclic silicone includes a compound represented by the formula ((CH ₃ ) ₂ SiO) _y . Wherein x is 0 to 80, specifically 0 to 20; y may be 1 to 9, specifically 5 to 6. In the case of linear silicon represented by (CH ₃ ) ₃ SiO ((CH ₃ ) ₂ SiO) _x Si (CH ₃ ) ₃ , when x exceeds 80, the viscosity becomes too high, Meanwhile, the kinetic viscosity of the silicone-based diluent may be 0.65 to 100 cSt (mm ² / s).

Examples of the organic diluent include aromatic hydrocarbons such as benzene, toluene, ethylbenzene and xylene; Aliphatic hydrocarbons such as pentane, cyclohexane, heptane, 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), perchlorethylene, ethyl chloride and chlorobenzene; Aldehyde; 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 and may be used in admixture with a siloxane.

Further, the first diluent according to the present invention may be contained in an amount of 30 to 95 parts by weight based on 100 parts by weight of the mixed weight of the silanol containing silicon-bonded hydrogen atoms, the polysiloxane containing the vinyl group, and the first diluent , More specifically from 50 to 90 parts by weight. The first diluent can obtain a uniform silicone elastomer having excellent physical properties within the above range.

Next, in the silicone elastomer composition according to the present invention, the above-mentioned hydrogenation siliconation reaction catalyst may be produced by crosslinking a hydrogen-bonded silicon atom of a polysiloxane containing hydrogen-bonded silicon atoms with a vinyl group of a polysiloxane containing a vinyl group And promotes curing.

The hydrogenation reaction catalyst applicable to the present invention is not particularly limited as long as it can promote cross-linking between a hydrogen-bonded silicon atom and a vinyl group.

Specifically, for example, a catalyst containing platinum (Pt) which is an eighth group transition metal may be used as the hydrogenation silicon addition reaction catalyst. More specifically, the present invention may use a Karstedt catalyst containing platinum (Pt) as described in U.S. Patent No. 3,715,334 in one embodiment, which is typically prepared by dissolving platinum in a solvent such as toluene (Pt (CH ₂ = CH (CH ₃ ) ₂ Si) ₂ O) catalyst containing about 1% by weight of a platinum divinyltetramethyldisiloxane (Pt).

In addition, the content of the hydrogenation-added reaction catalyst according to the present invention is 0.0001 to 0.01 part by weight based on 100 parts by weight of the mixed weight of the polysiloxane containing silicon-bonded hydrogen atoms and the polysiloxane containing vinyl groups, 0.0005 to 0.002 parts by weight. The hydrosilation reaction catalyst can effectively promote the reaction within the above-mentioned range, and the color of the silicone elastomer can be controlled by suppressing the impurity action in the produced silicone elastomer.

The silicone elastomer composition according to the present invention may further include additives generally used in connection with the production of silicone elastomer within the scope of the present invention. Specific examples thereof include, but are not limited to, fragrances, surfactants, natural oils, fillers, pigments, heat resistant additives, flame retardants, and curing inhibitors depending on the application.

The present invention also provides, in one embodiment, a silicone elastomer which is a crosslinking reaction product of the silicone elastomer composition and has a gel form.

Specifically, the silicone elastomer of the present invention comprises a mixture of a polysiloxane containing at least one hydrogen-bonded silicon atom and a polysiloxane containing at least one vinyl group as a crosslinking agent, in the presence of a first diluent and a hydrosilation reaction catalyst, Lt; / RTI >

At this time, the crosslinking reaction may be carried out at room temperature, but may be carried out at a temperature ranging from 30 to 120 ° C, more specifically from 50 to 80 ° C, in order to accelerate the process.

The silicone elastomer according to the present invention is produced from the silicone elastomer composition comprising a polysiloxane containing a silicon-bonded hydrogen-bonded polysiloxane and a vinyl group-containing polysiloxane, and has an excellent feeling on the skin.

Furthermore, the present invention provides, in one embodiment, a silicone paste comprising the silicone elastomer, the second diluent and the catalyst inhibitor.

Specifically, the silicon paste of the present invention comprises (a) a polysiloxane containing at least one hydrogen-bonded silicon atom, and a polysiloxane containing at least one vinyl group as a crosslinking agent, in the presence of a first diluent and a hydrogenation- (B) adding a second diluent to the silicone elastomer, and then applying a shear force to the silicone elastomer.

At this time, as the second diluent applicable to the present invention, the same compounds as those exemplified as the first diluent applicable in the above can be used. The second diluent may be 50 to 90 parts by weight, more specifically 60 to 80 parts by weight based on 100 parts by weight of the mixed weight of the first diluent and the second diluent. The second diluent can obtain a uniform paste within the above content range.

Further, the silicon paste according to the present invention may further include a catalyst inhibitor.

The silicone paste according to the present invention contains a catalyst inhibitor together with a silicone elastomer and a second diluent so that upon storage of the silicone paste, an additional crosslinking reaction by the unreacted residues of the silicone elastomer obtained by the crosslinking reaction causes the silicone periste It is possible to prevent the phenomenon of cracking and cracking.

At this time, the catalyst inhibitor according to the present invention may be an organosiloxane compound containing at least one vinyl group, or acetylenic alcohol.

Specifically, examples of the organosiloxane compound include at least one kind selected from the group consisting of 1,3-divinyl-1,1,3,3-tetramethyldisiloxane, vinylmethylcyclosiloxane, and vinylmethyltetracyclosiloxane But is not limited thereto.

Examples of acetylenic alcohols include 1-ethynyl-1-cyclohexanol, 3-methyl-1-dodecin-3-ol, 3,7,11-trimethyl- 3-ol, 2-methyl-3-butyn-2-ol and 3-methyl- 1-pentadecin-3-ol, but the present invention is not limited thereto.

The catalyst inhibitor according to the present invention may be used in an amount of 0.0001 to 1.0 part by weight based on 100 parts by weight of the combined weight of the polysiloxane containing at least one hydrogen-bonded silicon atom and the polysiloxane containing at least one vinyl group as a crosslinking agent . The catalyst inhibitor can effectively inhibit unreacted residues within the use range.

Further, applying a shear force to the silicone elastomer according to the present invention can be carried out using a conventional shearing device. For example, a shearing device such as a two-stage roll mill, a three-stage roll mill, a colloid mill, a batch mixer, an interlocking device mixer and a homogenizer may be used alone or in combination of two or more.

The silicone paste according to the present invention can be suitably molded to be used in various fields such as cosmetics, body protection products and medical products without limitation, and particularly useful for body protection products or medical products.

Hereinafter, the present invention will be described in more detail with reference to Examples and Experimental Examples.

However, the following Examples and Experimental Examples are merely illustrative of the present invention, and the present invention is not limited to the following Examples and Experimental Examples.

Example  One.

Step 1: Preparation of silicone elastomer

A polysiloxane having an average structural formula of (CH ₃ ) ₃ SiO ((CH ₃ ) ₂ SiO) ₃₀ ((CH ₃ ) HSiO) ₃ Si (CH ₃ ) ₃ , an average structural formula of H ₂ C = CH- (CH ₃ ) ₂ SiO) ₇₀ Si-CH = CH ₂ and cyclopentasiloxane (250 g) were mixed in a planetary mixer. Thereafter, a caster catalyst (0.55 g) containing 1 wt% of platinum (Pt) was added and mixed. The reaction mixture was then stirred at 60 DEG C for 2 hours to form a silicone elastomer.

Step 2: Preparation of silicon paste

The silicone elastomer formed in the step 1 was stabilized by stirring for 3 hours, and cyclopentasiloxane (500 g) and divinyltetramethyldisiloxane (0.08 g) were added and mixed. The mixed mixture was swelled under shear stress to produce a uniform silicone paste having a viscosity (25 DEG C) of 370,000 cPs.

Example  2.

Step 1: Preparation of silicone elastomer

A polysiloxane having an average structural formula of (CH ₃ ) ₃ SiO ((CH ₃ ) ₂ SiO) ₃₀ ((CH ₃ ) HSiO) ₃ Si (CH ₃ ) ₃ , an average structural formula of H ₂ C = CH- (CH ₃ ) ₂ SiO) ₂₀ Si-CH = CH ₂ and cyclopentasiloxane (140 g) were mixed in a planetary mixer. Thereafter, a caster catalyst (0.55 g) containing 1 wt% of platinum (Pt) was added and mixed. The reaction mixture was then stirred at 60 DEG C for 2 hours to form a silicone elastomer.

Step 2: Preparation of silicon paste

The silicone elastomer formed in step 1 was stabilized by stirring for 3 hours, and polydimethylsiloxane (250 g) and vinylmethylcyclosiloxane (0.042 g) were added and mixed. The mixed mixture was swelled under shear stress to produce a uniform silicone paste having a viscosity (25 DEG C) of 160,000 cPs.

Example  3.

Step 1: Preparation of silicone elastomer

A polysiloxane having an average structural formula of (CH ₃ ) ₃ SiO ((CH ₃ ) ₂ SiO) ₃₀ ((CH ₃ ) HSiO) ₃ Si (CH ₃ ) ₃ , an average structural formula of H ₂ C═CH-SiO ((CH _{3) 2} SiO) were mixed in a ₇₀ Si-CH = CH ₂ polysiloxane (145 g) and cyclopentasiloxane (250 g) to the planner planetary mixer (planetary mixer). Thereafter, a caster catalyst (0.55 g) containing 1 wt% of platinum (Pt) was added and mixed. The reaction mixture was then stirred at 60 DEG C for 2 hours to form a silicone elastomer.

Step 2: Preparation of silicon paste

The silicone elastomer formed in the step 1 was stabilized by stirring for 3 hours, and cyclopentasiloxane (250 g) and ethynylcyclohexanol (0.042 g) were added and mixed. The mixed mixture was swelled under shear stress to produce a uniform silicone paste having a viscosity (25 DEG C) of 360,000 cPs.

Comparative Example  One.

In the step 2 of Example 3, a silicone paste was prepared in the same manner as in Example 3 except that 500 g of cyclopentasiloxane was used and ethynylcyclohexanol was not added.

Experimental Example  1. Storage stability evaluation

The following experiment was conducted to evaluate the storage stability of the silicone paste according to the present invention.

The storage stability of the silicon paste prepared in Examples 1 to 3 and Comparative Example 1 was evaluated. The silicon paste prepared in Examples 1 to 3 and Comparative Example 1 was introduced into an oven at 80 캜 and allowed to stand for 48 hours. Thereafter, the shape of the silicon paste dispersed in the silicon paste and whether or not the silicon paste was agglomerated was visually observed . The results are shown in Table 1 below.

shape Aggregation Example 1 Uniformity Good Example 2 Uniformity Good Example 3 Uniformity Good Comparative Example 1 Uniformity Bad

In this case, 'good' means that the aggregation ratio of the silicon paste to the entire silicon paste is less than 1%; 'Bad' means a case where the coagulation rate of the silicon paste exceeds 50%.

As shown in Table 1, the silicone paste according to the present invention has excellent storage stability.

More specifically, it was confirmed that the silicone paste prepared in Examples 1 to 3 according to the present invention did not agglomerate at a high temperature of 80 캜 for a long time and maintained a uniform shape. However, the silicon paste of Comparative Example 1 containing no catalyst inhibitor was uniform in shape, but it was confirmed that the coagulation rate of the paste was high.

Experimental Example  2. Feeling  evaluation

The following experiment was conducted in order to evaluate the sensation on the skin of the silicone paste according to the present invention.

Experiments were conducted on the silicon paste prepared in Examples 1 to 3 and Comparative Example 1. Specifically, the silicone pastes prepared in Examples 1 to 3 and Comparative Example 1 were introduced into an oven at 80 ° C. and allowed to stand for 48 hours. Then 1 g of the silicone paste was aliquoted to evaluate the shape and spreadability upon application to the skin. At this time, the evaluation was performed three times for five panels per each sample. The evaluation results are shown in Table 2 below.

Feeling Example 1 ○ Example 2 ○ Example 3 △ Comparative Example 1 ×

In this case, " o " means that the lump is not felt; △ means that a small lump is felt and lumps are removed when rubbed less than 10 times; X means a case where a lump is felt and disappears or does not disappear when rubbed more than 10 times.

As shown in Table 2, the silicone paste according to the present invention has excellent feel on the skin.

More specifically, it was confirmed that the silicone paste produced in Examples 1 to 3 according to the present invention maintained a uniform shape without being agglomerated even after being left at a high temperature of 80 캜, and was well applied to the skin. On the contrary, when the silicone paste of Comparative Example 1 was agglomerated and applied to the skin, it felt a lump and rubbed more than 10 times, the lumps disappeared and it was completely applied to the skin.

These results indicate that the silicone paste according to the present invention is excellent in storage stability and is easy to be stored at room temperature and at high temperature for a long time and has a good feeling on the skin. Thus, silicone paste is useful in the field of body protection products or cosmetics Can be used.

Claims (16)

A polysiloxane containing at least one hydrogen-bonded silicon atom;
Polysiloxanes containing at least one vinyl group;
A first diluent; And
A silicon elastomer composition comprising a hydrogenation siliconation reaction catalyst.
The method according to claim 1,
Wherein the polysiloxane containing at least one silicon-bonded hydrogen atom is any one or more of compounds represented by the following general formulas (1) to (3):
[Chemical 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 the above Chemical Formulas 1 to 3,
And R, R 'and R "are independently alkyl of C _{1 ~ 10} each other,
a is independently from 0 to 1,000,
and b are independently from 1 to 250 each other.
3. The method of claim 2,
Wherein the molar ratio of the compound represented by the formula (1) to the hydrogen-bonded silicon atom and the molar equivalent of the compound represented by the formula (2) and the compound represented by the formula (3) to the hydrogen atom bonded silicon atom is 1:
The method according to claim 1,
The polysiloxane containing at least one vinyl group is a silicone elastomer composition represented by the following formula (4)
[Chemical Formula 4]
R ₂ C = CR'-SiO (R " ₂ SiO) _a Si-CR '= CR ₂
In Formula 4,
And R, R 'and R "are independently hydrogen or C alkyl of _{1 to 10} with each other,
a is independently from 0 to 1000;
5. The method of claim 4,
Wherein R, R 'and R "are independently from each other hydrogen, methyl, ethyl or propyl,
a is independently from 1 to 250;
5. The method of claim 4,
Wherein the polysiloxane containing at least one vinyl group is a compound represented by the following formula (5) or (6):
[Chemical Formula 5]
H ₂ C = CH-SiO ((CH ₃ ) ₂ SiO) ₂₀ Si-CH = CH ₂
[Chemical Formula 6]
H ₂ C = CH-SiO ((CH ₃ ) ₂ SiO) ₇₀ Si-CH = CH ₂ .
The method according to claim 1,
Wherein the molar equivalent ratio between the silicon-bonded hydrogen atom of the polysiloxane containing silicon-bonded hydrogen atoms and the vinyl group of the polysiloxane containing vinyl groups is 1: 0.6 to 1.5.
The method according to claim 1,
Wherein the first diluent is contained in an amount of 30 to 95 parts by weight based on 100 parts by weight of the mixed weight of the polysiloxane containing hydrogen-bonded silicon atoms, the polysiloxane containing vinyl groups, and the first diluent.
The method according to claim 1,
The silicon hydride addition reaction catalyst is a catalyst containing platinum (Pt).
The method according to claim 1,
Wherein the hydrogenation siliconation reaction catalyst is contained in an amount of 0.0001 to 0.01 part by weight based on 100 parts by weight of the mixture weight of the polysiloxane containing silicon-bonded hydrogen-bonded polysiloxane and the vinyl group-containing polysiloxane.
A silicone elastomer having a gel shape, which is a crosslinking reaction product of the silicone elastomer composition according to claim 1.
A silicone paste comprising the silicone elastomer according to claim 11, a second diluent and a catalyst inhibitor.
13. The method of claim 12,
The catalyst inhibitor is an organosiloxane compound containing at least one vinyl group, or acetylene alcohol.
14. The method of claim 13,
Wherein the organosiloxane compound is at least one selected from the group consisting of 1,3-divinyl-1,1,3,3-tetramethyldisiloxane, vinylmethylcyclosiloxane, and vinylmethyltetracyclosiloxane.
14. The method of claim 13,
Acetylenic alcohols include 1-ethynyl-1-cyclohexanol, 3-methyl-1-dodecin-3-ol, 3,7,11- 3-ol, 2-methyl-3-butyn-2-ol and 3-methyl-1-pentadecyne-3 - < / RTI >
13. The method of claim 12,
Wherein the catalyst inhibitor is 0.0001 to 1.0 part by weight based on 100 parts by weight of the mixture weight of the polysiloxane containing silicon-bonded hydrogen-bonded polysiloxane and the vinyl-containing polysiloxane.