CN112915046B - Organic silicon elastomer gel and preparation method and application thereof - Google Patents
Organic silicon elastomer gel and preparation method and application thereof Download PDFInfo
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- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
- A61K8/89—Polysiloxanes
- A61K8/891—Polysiloxanes saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
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Abstract
The invention belongs to the technical field of organic silicon elastomers, and particularly relates to an organic silicon elastomer gel and a preparation method and application thereof. The organic silicon elastomer gel comprises the following components in parts by weight: 100 to 200 parts of hydrogen-containing silicone oil, 2 to 50 parts of vinyl MQ resin, 8 to 80 parts of vinyl-terminated silicone oil, 1 to 30ppm of platinum catalyst and 400 to 1000 parts of carrier fluid. The organic silicon elastomer gel provided by the invention can provide lasting velvety smooth feeling for products, can bring matte and soft-scorching effects for the products, can reduce the sticky feeling of the products, provides fresh and non-greasy skin feeling for the products, can be made into a high-transparency system, has good waterproof performance, can play a thickening effect in an anhydrous formula and a water-in-oil formula, and can also improve the stability of the products.
Description
Technical Field
The invention belongs to the technical field of organic silicon elastomers, and particularly relates to an organic silicon elastomer gel and a preparation method and application thereof.
Background
The organosilicon compound is a compound which takes repeated Si-O-Si groups as a main chain and is connected with other organic groups on a silicon atom. The silicone elastomers are simply silicon-containing network polymers in various forms and with different crosslinking degrees, and are mainly classified according to different properties: white fine powder-like silicone resin microspheres, silicone resin emulsion, and colorless gel-like silicone elastomer gel. The organic silicon elastomer is widely applied to industries such as electronics, medical treatment, leather, ships, daily chemicals and the like by virtue of excellent cold and hot stability, electrical appliance insulation, ozone resistance, physiological inertia and the like.
The silicone gel can be regarded as discrete cross-linked silicone elastomer gel particles dispersed in a carrier fluid, can be used as an effective rheological thickener of low-relative molecular mass silicone fluid, and can be added into skin care products and color cosmetic products, so that the mild initial feeling and the film forming feeling of the low-relative molecular mass silicone fluid can be provided, and meanwhile, the high viscosity of the skin care products and the color cosmetic products can be maintained. Some commonly used moisturizers such as glycerin and the like can generate greasy feeling when added in a large amount in skin care products and color cosmetics, so that the products are not easy to distribute and spread on the skin; when the skin care products and the color cosmetics are added with a large amount of panthenol or niacinamide, sticky feeling is generated. To improve spreadability and the perceived freshness of skin care and color cosmetic products during use, it is generally desirable to add silicone fluids of low relative molecular mass to impart a dry, smooth, uniform feel to the cosmetic composition and to add visual shine. However, the low relative molecular mass of silicone fluids, while imparting desirable properties to the composition, their volatile and low viscosity characteristics make them less likely to remain in the formulation, separate easily, and may even flow uncontrolled through the skin during use, limiting their use in cosmetic compositions. If the viscosity of the solution is increased by using common thickeners and the evaporative loss of volatile low relative molecular mass silicone oils is slowed, the spreadability of the silicone oil may be reduced and a severe greasy feel may be imparted to the skin. And the existing siloxane fluid has the problem of poor waterproof performance. Therefore, it is very desirable to develop a silicone elastomer gel which can provide a long-lasting velvety smooth feeling to a product, can reduce the sticky feeling of a product, can provide a fresh and non-greasy skin feeling to a product, has good spreading degree and good waterproof performance, can not only have a thickening effect, but also can improve the stability of a product, and the like.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a silicone elastomer gel and a preparation method and application thereof. The organic silicon elastomer gel provided by the invention can provide lasting velvety smooth feeling for products, can bring matte and soft-scorched effects for the products, can reduce the sticky feeling of the products, provides fresh and non-greasy skin feeling for the products, can be made into a high-transparency system, has good smearing and spreading degree and good waterproof performance, can play a thickening effect in an anhydrous formula and a water-in-oil formula, and can also improve the stability of the products.
The technical scheme of the invention is as follows:
an organic silicon elastomer gel comprises the following components in parts by weight: 100 to 200 parts of hydrogen-containing silicone oil, 2 to 50 parts of vinyl MQ resin, 8 to 80 parts of vinyl-terminated silicone oil, 1 to 30ppm of platinum catalyst and 400 to 1000 parts of carrier fluid.
Further, the silicone elastomer gel comprises the following components in parts by weight: 134 parts of hydrogen-containing silicone oil, 23 parts of vinyl MQ resin, 35 parts of terminal vinyl silicone oil, 10ppm of platinum catalyst and 650 parts of carrier fluid.
Further, the hydrogen content of the hydrogen-containing silicone oil is 0.1-1.5%.
Further, the vinyl MQ resin consists of two vinyl MQ resins with the vinyl content of 0.1-3%, the quantity ratio of M chain links to Q chain links in a molecular structure of 0.3-2: 1 and the molecular weight of 3000-20000 according to the mass ratio of 5-8: 1-3.
Further, the molecular formula of the vinyl-terminated silicone oil is as follows:
CH2＝CH-Si(CH3)2O[(CH3)2SiO]n(CH3)2Si-CH＝CH2wherein n is a natural number between 30 and 150.
Further, the platinum catalyst is an isopropanol solution of chloroplatinic acid or a vinyl platinum complex.
Further, the carrier fluid is polydimethylsiloxane and an isoparaffin.
Further, the viscosity of the polydimethylsiloxane is 5-1000 CS.
Further, the mass ratio of the polydimethylsiloxane to the isoparaffin is 4-8: 1.
Further, the mass ratio of the polydimethylsiloxane to the isoparaffin is 6: 1.
Further, the isomeric alkane is composed of isomeric dodecane and isomeric hexadecane according to the mass ratio of 1-3: 5-9.
Further, the isomeric alkane consists of isomeric dodecane and isomeric hexadecane in a mass ratio of 2: 7.
In addition, the invention also provides a preparation method of the organic silicon elastomer gel, which comprises the following steps:
s1, cleaning and drying a stirring reaction kettle, adding vinyl MQ resin, vinyl-terminated silicone oil, hydrogen-containing silicone oil and carrier fluid into the stirring reaction kettle, starting a stirrer, stirring at the speed of 10-30 r/min, adding a platinum catalyst into the stirring reaction kettle, and heating to 90-100 ℃ under the stirring condition;
s2, after the temperature of the materials is raised to 90-100 ℃, keeping the temperature for 7 hours, introducing nitrogen in the process of keeping the temperature, and cooling after keeping the temperature;
and S3, cooling the gel obtained after the reaction to 25-35 ℃, continuing stirring for 3 hours, and carrying out vacuum defoaming to obtain the product.
Another object of the present invention is to provide the use of said silicone elastomer gel in cosmetic products.
Still another object of the present invention is the use of said silicone elastomer gel in cosmetic products, such as skin care products, antiperspirants, make-up, sunscreens, foundations.
According to the invention, by adding the vinyl MQ resin with different molecular weights into the reaction system, not only can the film-forming water resistance of the product be improved, but also the matte degree of the product can be improved, so that the obtained product has lasting hand feeling and velvet feeling. Besides, the addition of vinyl MQ resin with different molecular weights into the system can also play a role in thickening.
Compared with the prior art, the invention has the following advantages:
(1) the polydimethylsiloxane and the isoparaffin with a certain mass ratio are used as carrier fluid, the restriction of the European Union REACH regulation of cosmetics is met, and the polydimethylsiloxane and the isoparaffin have combined action, so that the obtained product has more excellent silky smooth feeling, matte light feeling, spreading degree and skin feeling durability.
(2) The preparation process of the organic silicon elastomer gel is convenient to operate, does not need to add other carriers for swelling, and does not need colloid mills, high-speed shearing dispersion machines and other equipment.
(3) The organic silicon elastomer gel provided by the invention can provide lasting velvety smooth feeling for products, can bring matte and soft-scorched effects for the products, can reduce the sticky feeling of the products, provides fresh and non-greasy skin feeling for the products, can be made into a high-transparency system, has good smearing and spreading degree and good waterproof performance, can play a thickening effect in an anhydrous formula and a water-in-oil formula, and can also improve the stability of the products.
Detailed Description
The present invention is further described in the following description of the specific embodiments, which is not intended to limit the invention, but various modifications and improvements can be made by those skilled in the art according to the basic idea of the invention, within the scope of the invention, as long as they do not depart from the basic idea of the invention.
Example 1A Silicone elastomer gel
The organic silicon elastomer gel comprises the following components in parts by weight: 100 parts of hydrogen-containing silicone oil, 2 parts of vinyl MQ resin, 8 parts of terminal vinyl silicone oil, 1ppm of platinum catalyst and 400 parts of carrier fluid; the hydrogen content of the hydrogen-containing silicone oil is 0.1 percent; the vinyl MQ resin consists of 0.1 percent of vinyl, 0.3:1 of the quantity ratio of M chain link to Q chain link in a molecular structure, 3 percent of vinyl MQ resin with molecular weight of 3000 and 2:1 of the quantity ratio of M chain link to Q chain link in the molecular structure, and 20000 of the vinyl MQ resin according to the mass ratio of 5: 2; the molecular formula of the vinyl-terminated silicone oil is as follows: CH (CH)2＝CH-Si(CH3)2O[(CH3)2SiO]n(CH3)2Si-CH＝CH2Wherein n is 30; the platinum catalyst is a chloroplatinic acid isopropanol solution with the mass concentration of 0.5%; the carrier fluid is polydimethylsiloxane with the viscosity of 5CS and isoparaffin, and the mass ratio of the polydimethylsiloxane to the isoparaffin is 4: 1; the isomeric alkane consists of isomeric dodecane and isomeric hexadecane in a mass ratio of 1: 9.
The preparation method of the organic silicon elastomer gel comprises the following steps:
s1, cleaning and drying a stirring reaction kettle, adding the vinyl MQ resin, the vinyl-terminated silicone oil, the hydrogen-containing silicone oil and the carrier fluid into the stirring reaction kettle, starting a stirrer, stirring at the speed of 10r/min, adding the platinum catalyst into the stirring reaction kettle, and heating to 90 ℃ under the stirring condition;
s2, keeping the temperature for 7 hours after the temperature of the materials is raised to 90 ℃, introducing nitrogen in the process of keeping the temperature, and cooling after keeping the temperature;
and S3, cooling the gel obtained by the reaction to 25 ℃, continuing stirring for 3 hours, and carrying out vacuum defoaming to obtain the product.
Example 2A Silicone elastomer gel
The organic silicon elastomer gel comprises the following components in parts by weight: 200 parts of hydrogen-containing silicone oil, 50 parts of vinyl MQ resin, 80 parts of terminal vinyl silicone oil, 30ppm of platinum catalyst and 1000 parts of carrier fluid; the hydrogen content of the hydrogen-containing silicone oil is 1.5 percent; the vinyl MQ resin consists of 0.1 percent of vinyl, 0.3:1 of the quantity ratio of M chain link to Q chain link in a molecular structure, 3 percent of vinyl MQ resin with molecular weight of 3000 and 2:1 of the quantity ratio of M chain link to Q chain link in the molecular structure, and 20000 of the vinyl MQ resin according to the mass ratio of 8: 1; the molecular formula of the vinyl-terminated silicone oil is as follows: CH (CH)2＝CH-Si(CH3)2O[(CH3)2SiO]n(CH3)2Si-CH＝CH2Wherein n is 150; the platinum catalyst is a vinyl platinum complex; the carrier fluid is polydimethylsiloxane with the viscosity of 1000CS and isoparaffin, and the mass ratio of the polydimethylsiloxane to the isoparaffin is 8: 1; the isomeric alkane consists of isomeric dodecane and isomeric hexadecane according to the mass ratio of 3: 5.
The preparation method of the organic silicon elastomer gel comprises the following steps:
s1, cleaning and drying a stirring reaction kettle, adding the vinyl MQ resin, the vinyl-terminated silicone oil, the hydrogen-containing silicone oil and the carrier fluid into the stirring reaction kettle, starting a stirrer, stirring at the speed of 30r/min, adding the platinum catalyst into the stirring reaction kettle, and heating to 100 ℃ under the stirring condition;
s2, keeping the temperature for 7 hours after the temperature of the materials is raised to 100 ℃, introducing nitrogen in the process of keeping the temperature, and cooling after keeping the temperature;
and S3, cooling the gel obtained by the reaction to 35 ℃, continuing stirring for 3 hours, and carrying out vacuum defoaming to obtain the product.
Example 3A Silicone elastomer gel
The organic silicon elastomer gel comprises the following components in parts by weight: 134 parts of hydrogen-containing silicone oil, 23 parts of vinyl MQ resin, 35 parts of terminal vinyl silicone oil, 10ppm of platinum catalyst and 650 parts of carrier fluid; the hydrogen content of the hydrogen-containing silicone oil is 0.8%; the vinyl MQ resin consists of 0.1 percent of vinyl, 0.3:1 of the quantity ratio of M chain link to Q chain link in a molecular structure, 3 percent of vinyl MQ resin with molecular weight of 3000 and 2:1 of the quantity ratio of M chain link to Q chain link in the molecular structure, and 20000 of the vinyl MQ resin according to the mass ratio of 7: 2; the molecular formula of the vinyl-terminated silicone oil is as follows: CH (CH)2＝CH-Si(CH3)2O[(CH3)2SiO]n(CH3)2Si-CH＝CH2Wherein n is 90; the platinum catalyst is a chloroplatinic acid isopropanol solution with the mass concentration of 0.5%; the carrier fluid is polydimethylsiloxane having a viscosity of 300CS and an isoparaffin; the mass ratio of the polydimethylsiloxane to the isoparaffin is 6: 1; the isomeric alkane consists of isomeric dodecane and isomeric hexadecane in a mass ratio of 2: 7.
The preparation method of the organic silicon elastomer gel comprises the following steps:
s1, cleaning and drying a stirring reaction kettle, adding the vinyl MQ resin, the vinyl-terminated silicone oil, the hydrogen-containing silicone oil and the carrier fluid into the stirring reaction kettle, starting a stirrer, stirring at the speed of 25r/min, adding the platinum catalyst into the stirring reaction kettle, and heating to 95 ℃ under the stirring condition;
s2, keeping the temperature for 7 hours after the temperature of the materials is raised to 95 ℃, introducing nitrogen in the process of keeping the temperature, and cooling after keeping the temperature;
and S3, cooling the gel obtained by the reaction to 30 ℃, continuing stirring for 3 hours, and carrying out vacuum defoaming to obtain the product.
Comparative example 1A Silicone elastomer gel
The organic silicon elastomer gel comprises the following components in parts by weight: 134 parts of hydrogen-containing silicone oil, 23 parts of vinyl MQ resin, 35 parts of terminal vinyl silicone oil, 10ppm of platinum catalyst and 650 parts of carrier fluid; the hydrogen content of the hydrogen-containing silicone oil is 0.8%; the vinyl MQ resin consists of 0.1 percent of vinyl, 0.3:1 of the quantity ratio of M chain link to Q chain link in a molecular structure, 3 percent of vinyl MQ resin with molecular weight of 3000 and 2:1 of the quantity ratio of M chain link to Q chain link in the molecular structure, and 20000 of the vinyl MQ resin according to the mass ratio of 7: 2; the molecular formula of the vinyl-terminated silicone oil is as follows: CH (CH)2＝CH-Si(CH3)2O[(CH3)2SiO]n(CH3)2Si-CH＝CH2Wherein n is 90; the platinum catalyst is a chloroplatinic acid isopropanol solution with the mass concentration of 0.5%; the carrier fluid is polydimethylsiloxane having a viscosity of 300CS and an isoparaffin; the mass ratio of the polydimethylsiloxane to the isoparaffin is 6: 1; the isomeric alkane consists of isomeric dodecane and isomeric hexadecane in a mass ratio of 1: 1.
The silicone elastomer gel was prepared similarly to example 3.
In contrast to example 3, the isomeric alkanes consisted of isomeric dodecanes and isomeric hexadecanes in a mass ratio of 1: 1.
Comparative example 2A Silicone elastomer gel
The organic silicon elastomer gel comprises the following components in parts by weight: 134 parts of hydrogen-containing silicone oil, 23 parts of vinyl MQ resin, 35 parts of terminal vinyl silicone oil, 10ppm of platinum catalyst and 650 parts of carrier fluid; the hydrogen content of the hydrogen-containing silicone oil is 0.8%; the vinyl MQ resin consists of 0.1 percent of vinyl, 0.3:1 of the quantity ratio of M chain link to Q chain link in a molecular structure, 3 percent of vinyl MQ resin with molecular weight of 3000 and 2:1 of the quantity ratio of M chain link to Q chain link in the molecular structure, and 20000 of the vinyl MQ resin according to the mass ratio of 7: 2; the molecular formula of the vinyl-terminated silicone oil is as follows: CH (CH)2＝CH-Si(CH3)2O[(CH3)2SiO]n(CH3)2Si-CH＝CH2Wherein n is 90; the platinum catalyst is a chloroplatinic acid isopropanol solution with the mass concentration of 0.5%; the carrier fluid is polydimethylsiloxane having a viscosity of 300CS and an isoparaffin; the mass ratio of the polydimethylsiloxane to the isoparaffin is 6: 1; the isomeric alkane is isomeric hexadecane.
The silicone elastomer gel was prepared similarly to example 3.
In contrast to example 3, the isomeric alkane is the isomeric hexadecane.
Comparative example 3A Silicone elastomer gel
The organic silicon elastomer gel comprises the following components in parts by weight: 134 parts of hydrogen-containing silicone oil, 23 parts of vinyl MQ resin, 35 parts of terminal vinyl silicone oil, 10ppm of platinum catalyst and 650 parts of carrier fluid; the hydrogen content of the hydrogen-containing silicone oil is 0.8%; the vinyl MQ resin consists of 0.1 percent of vinyl, 0.3:1 of the quantity ratio of M chain link to Q chain link in a molecular structure, 3 percent of vinyl MQ resin with molecular weight of 3000 and 2:1 of the quantity ratio of M chain link to Q chain link in the molecular structure, and 20000 of the vinyl MQ resin according to the mass ratio of 1: 1; the molecular formula of the vinyl-terminated silicone oil is as follows: CH (CH)2＝CH-Si(CH3)2O[(CH3)2SiO]n(CH3)2Si-CH＝CH2Wherein n is 90; the platinum catalyst is a chloroplatinic acid isopropanol solution with the mass concentration of 0.5%; the carrier fluid is polydimethylsiloxane having a viscosity of 300CS and an isoparaffin; the mass ratio of the polydimethylsiloxane to the isoparaffin is 6: 1; the isomeric alkane consists of isomeric dodecane and isomeric hexadecane in a mass ratio of 2: 7.
The silicone elastomer gel was prepared similarly to example 3.
Unlike example 3, the vinyl MQ resin was composed of a vinyl content of 0.1%, a ratio of the amount of M mer to Q mer in the molecular structure of 0.3:1, a vinyl MQ resin having a molecular weight of 3000, and a vinyl content of 3%, a ratio of the amount of M mer to Q mer in the molecular structure of 2:1, a vinyl MQ resin having a molecular weight of 20000 in a mass ratio of 1: 1.
Comparative example 4A Silicone elastomer gel
The organic silicon elastomer gel comprises the following components in parts by weight: 134 parts of hydrogen-containing silicone oil, 23 parts of vinyl MQ resin, 35 parts of terminal vinyl silicone oil, 10ppm of platinum catalyst and 650 parts of carrier fluid; the hydrogen content of the hydrogen-containing silicone oil is 0.8%; the vinyl MQ resin is vinyl MQ resin with vinyl content of 0.1%, the quantity ratio of M chain link to Q chain link in the molecular structure of 0.3:1 and molecular weight of 3000; the molecular formula of the vinyl-terminated silicone oil is as follows: CH (CH)2＝CH-Si(CH3)2O[(CH3)2SiO]n(CH3)2Si-CH＝CH2Wherein n is 90; the platinum catalyst is a chloroplatinic acid isopropanol solution with the mass concentration of 0.5%; the carrier fluid is polydimethylsiloxane having a viscosity of 300CS and an isoparaffin; the mass ratio of the polydimethylsiloxane to the isoparaffin is 6: 1; the isomeric alkane consists of isomeric dodecane and isomeric hexadecane in a mass ratio of 2: 7.
The silicone elastomer gel was prepared similarly to example 3.
Unlike example 3, the vinyl MQ resin was a vinyl MQ resin having a vinyl content of 0.1%, a ratio of the amount of M mer to the amount of Q mer in the molecular structure of 0.3:1, and a molecular weight of 3000.
Comparative example 5A Silicone elastomer gel
The organic silicon elastomer gel comprises the following components in parts by weight: 134 parts of hydrogen-containing silicone oil, 23 parts of vinyl MQ resin, 35 parts of terminal vinyl silicone oil, 10ppm of platinum catalyst and 650 parts of carrier fluid; the hydrogen content of the hydrogen-containing silicone oil is 0.8%; the vinyl MQ resin is vinyl MQ resin with 3 percent of vinyl content, 2:1 of the quantity ratio of M chain link to Q chain link in the molecular structure and 20000 of molecular weight; the molecular formula of the vinyl-terminated silicone oil is as follows: CH (CH)2＝CH-Si(CH3)2O[(CH3)2SiO]n(CH3)2Si-CH＝CH2Wherein n is 90; the platinum catalyst is a chloroplatinic acid isopropanol solution with the mass concentration of 0.5%; the carrier fluid is polydimethylsiloxane having a viscosity of 300CS and an isoparaffin; the mass ratio of the polydimethylsiloxane to the isoparaffin is 6: 1; the isomeric alkane consists of isomeric dodecane and isomeric hexadecane in a mass ratio of 2: 7.
The silicone elastomer gel was prepared similarly to example 3.
Unlike example 3, the vinyl MQ resin was a vinyl MQ resin having a vinyl content of 3%, a ratio of the amount of M mer to the amount of Q mer in the molecular structure of 2:1, and a molecular weight of 20000.
Test example I, sensory evaluation
1. Test materials: example 3, comparative examples 1-5.
2. The test method comprises the following steps:
10 experiential evaluation subjects are selected to score the silky feel, the matte feel, the smearing and spreading degree and the skin feel durability of the prepared silicone elastomer gel, and the higher the score is, the better the effect is.
3. The sensory evaluation results are shown in Table 1.
Table 1: sensory evaluation results
| Sensory index | Feeling of silkiness | Matte sense | Spreading degree of paint | Skin feel durability |
| Practice ofExample 3 | 10 | 9.5 | 9.7 | 10 |
| Comparative example 1 | 9.2 | 8.7 | 9.2 | 9.0 |
| Comparative example 2 | 8.5 | 7.9 | 8.6 | 8.3 |
| Comparative example 3 | 9.4 | 8.9 | 9.0 | 9.3 |
| Comparative example 4 | 8.8 | 8.4 | 8.5 | 7.4 |
| Comparative example 5 | 8.3 | 7.7 | 7.9 | 8.7 |
As can be seen from table 1, the silicone elastomer gel prepared in example 3 of the present invention has higher scores for silky feel, matte feel, spread degree upon application, and skin feel durability; the silicone elastomer gel prepared in example 3 of the present invention had a higher rating for each index than comparative examples 1 to 5.
Test example two, Water resistance test
1. Test materials: silicone elastomer gels prepared in example 3 and comparative examples 3-5.
2. The test method comprises the following steps:
the static contact angle of the silicone elastomer gel was measured using a contact angle tester. Solidifying organic silicon elastomer gel into a transparent elastomer sheet with smooth upper and lower surfaces, placing the transparent elastomer sheet on a sample table, taking ultrapure water as test liquid, dropping the ultrapure water on the transparent elastomer sheet at the flat position, standing for 30s, then taking a picture, and analyzing the size of the water contact angle by adopting a system self-contained angle measuring software. The sample was measured for 5 different flat positions and averaged.
3. And (3) test results: the results of the water resistance test are shown in Table 2.
Table 2: test results of Water repellency
| Test items | Example 3 | Comparative example 3 | Comparative example 4 | Comparative example 5 |
| Contact angle (°) | 162.8 | 156.3 | 148.2 | 152.7 |
As can be seen from Table 2, the contact angle of the silicone elastomer gel prepared in inventive example 3 was significantly higher than that of the silicone elastomer gels prepared in comparative examples 3 to 5, indicating that the silicone elastomer gel prepared in the present invention had more excellent water-repellent properties.
Claims (3)
1. The organic silicon elastomer gel is characterized by comprising the following components in parts by weight: 134 parts of hydrogen-containing silicone oil, 23 parts of vinyl MQ resin, 35 parts of terminal vinyl silicone oil, 10ppm of platinum catalyst and 650 parts of carrier fluid; the hydrogen content of the hydrogen-containing silicone oil is 0.8%; the vinyl MQ resin consists of 0.1 percent of vinyl content, 0.3:1 of the quantity ratio of M chain link to Q chain link in a molecular structure, 3 percent of vinyl MQ resin with molecular weight of 3000 and 2:1 of the quantity ratio of M chain link to Q chain link in the molecular structure according to the mass ratio of 7: 2; the molecular formula of the vinyl-terminated silicone oil is as follows:
CH2=CH-Si(CH3)2O[(CH3)2SiO]n(CH3)2Si-CH=CH2wherein n is 90; the platinum catalyst is a chloroplatinic acid isopropanol solution with the mass concentration of 0.5%; the carrier fluid is polydimethylsiloxane having a viscosity of 300CS and an isoparaffin; the mass ratio of the polydimethylsiloxane to the isoparaffin is 6: 1; the isomeric alkane consists of isomeric dodecane and isomeric hexadecane in a mass ratio of 2: 7;
the preparation method of the organic silicon elastomer gel comprises the following steps:
s1, cleaning and drying a stirring reaction kettle, adding vinyl MQ resin, vinyl-terminated silicone oil, hydrogen-containing silicone oil and carrier fluid into the stirring reaction kettle, starting a stirrer, stirring at a speed of 25r/min, adding a platinum catalyst into the stirring reaction kettle, and heating to 95 ℃ under the stirring condition;
s2, keeping the temperature for 7 hours after the temperature of the materials is raised to 95 ℃, introducing nitrogen in the process of keeping the temperature, and cooling after keeping the temperature;
and S3, cooling the gel obtained by the reaction to 30 ℃, continuing stirring for 3 hours, and carrying out vacuum defoaming to obtain the product.
2. Use of the silicone elastomer gel of claim 1 in the preparation of a cosmetic product.
3. Use of the silicone elastomer gel of claim 2 in the preparation of a cosmetic product, wherein the cosmetic product is an antiperspirant, a make-up, a sunscreen.
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