CN111217965A - High-transparency high-refraction organic silicon elastomer gel and preparation method thereof - Google Patents
High-transparency high-refraction organic silicon elastomer gel and preparation method thereof Download PDFInfo
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/12—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polysiloxanes
- C08F283/128—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polysiloxanes on to reaction products of polysiloxanes having at least one Si-H bond and compounds having carbon-to-carbon double bonds
Abstract
the invention discloses a high-transparency high-refraction organic silicon elastomer gel which is prepared from phenyl hydrogen-containing MQ resin, phenyl vinyl MQ silicon resin, carrier fluid and α -olefin under the catalysis of a platinum catalyst, wherein two kinds of MQ resins with high phenyl content are adopted to form a compact three-dimensional structure through hydrosilylation reaction, the α -olefin is adopted to graft and modify a product after hydrosilylation, the cross-linking strength of raw materials is high, the phenyl content in the gel is high, the transparency and the refractive index are high, the gel not only has the silky skin feeling of a traditional organic silicon elastomer, but also has excellent film-forming property of the silicon resin, the grafting amount of alkyl in the gel is increased, the compatibility with grease in daily cosmetics is good, and the gel can be stably compatible with daily chemical products in a wider range.
Description
Technical Field
The invention relates to the field of organic silicon materials, in particular to a high-transparency high-refraction organic silicon elastomer gel and a preparation method thereof.
Background
Silicone elastomer gels are mostly obtained by a crosslinking hydrosilylation reaction of a Si-H polysiloxane with another polysiloxane containing unsaturated hydrocarbon substituents, such as a vinyl-functional polysiloxane, or by crosslinking a Si-H polysiloxane with a hydrocarbon diene. Has unique cross-linked network structure, certain resilience when external force is applied, and soft and comfortable feeling and velvety silky feeling caused by the change of the microstructure when the cosmetic is smeared on the skin, and is often added into high-grade cosmetics. However, the application of the current silicone elastomer gel in daily cosmetics is still limited, such as insufficient effectiveness for organic solvents and carrier fluids, limited compatibility with personal care products, incompatibility with oil phase ingredients in the personal care products, difficulty in forming a strong enough film, easy sticky feeling and the like.
MQ silicone resin is organic/inorganic hybrid polyorganosiloxane which is composed of a monofunctional Si-O unit (M unit) and a tetrafunctional Si-O unit (SiQZ is called Q unit for short), and has a compact sphere with a double-layer structure. MQ resin has good mechanical property, film forming property and high temperature resistance, and is often used as a reinforcing material to be applied to silicon rubber or packaging rubber materials. Reports of the use of MQ silicone resins for the preparation of silicone elastomer gels for daily use are still relatively rare. Although researches have been made on the preparation of silicone elastomers by hydrosilylation addition reaction of vinyl MQ silicone resin and hydrogen-containing polysiloxane to improve the greasy feeling of products, the commonly used vinyl MQ resin is mostly methyl vinyl silicone resin with lower refractive index and the like, which affects the transparency and refractive index of the elastomers and further affects the application effect and visual effect of daily cosmetics; and still has not been improved in compatibility and compatibility.
Disclosure of Invention
in order to overcome the defects of the prior art, one of the purposes of the invention is to provide a high-transparency high-refraction organic silicon elastomer gel, two MQ resins with high phenyl content are adopted to form a three-dimensional structure through hydrosilylation addition reaction, and α -olefin is adopted to graft and modify the added product, wherein the cross-linking strength of the raw materials is high, the phenyl content in the gel is high, the transparency and the refractive index are high, the film forming property is excellent, the grafting amount of alkyl in the gel is increased, the compatibility with grease in daily cosmetics is good, and the gel can be stably compatible with daily chemical products in a wider range;
the second purpose of the invention is to provide a preparation method of the high-transparency high-refraction organic silicon elastomer gel, the cross-linking reaction and the cross-linking structure between MQ resins are easy to control, and the alkyl grafting rate is high.
One of the purposes of the invention is realized by adopting the following technical scheme:
a high-transparency high-refraction organic silicon elastomer gel is prepared from the following components in percentage by mass under the catalysis of a platinum catalyst:
the carrier fluid is any one of cyclic siloxane, linear siloxane and isoparaffin.
Further, the content of H in the phenyl hydrogen-containing MQ resin is 0.05-0.5 wt%, and M/Q is (0.5-1.5): 1, the viscosity of the phenyl hydrogen-containing MQ resin at 25 ℃ is 5.0-300.0 cSt.
The content of vinyl in the phenyl vinyl MQ silicon resin is 0.5-3.0 wt%, and M/Q is (0.5-1.5): 1.
the number average molecular weight of the phenyl vinyl MQ silicon resin is 2000-10000.
Preferably, the cyclic siloxane is any one or more of hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane; the straight chain siloxane is one or the combination of two of polydimethylsiloxane with the viscosity of 1-50cp and phenyl silicone oil with the viscosity of 1-50 cp; the isoparaffin is one or two of isododecane and isohexadecane.
Further, the carrier fluid further comprises one or more of squalane, rose hip oil, nut oil, shea butter, aloe vera oil, and olive oil.
preferably, the number of carbon atoms in the alpha-olefin is from 8 to 18.
Further, the platinum catalyst is an isopropanol solution of chloroplatinic acid or a vinyl platinum complex.
The second purpose of the invention can be achieved by adopting the following technical scheme:
a preparation method of the high-transparency high-refraction organic silicon elastomer gel is characterized by comprising the steps of uniformly mixing phenyl hydrogen-containing MQ resin with carrier fluid, heating to 40-90 ℃, adding phenyl vinyl MQ silicon resin, uniformly stirring, adding platinum catalyst, uniformly stirring, preserving heat for 2-8 hours, heating to 90-100 ℃, dropwise adding α -olefin while stirring, preserving heat for 4-5 hours after dropwise adding is completed, and carrying out colloid milling on the obtained product to obtain the high-transparency high-refraction organic silicon elastomer gel.
Further, the addition amount of the platinum catalyst is calculated by the concentration of the metal platinum in the preparation system, and the concentration of the metal platinum in the preparation system is 5-20 ppm.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention uses MQ resin with high phenyl content, adopts phenyl hydrogen-containing MQ resin and phenyl vinyl MQ silicon resin both having a double-layer structure to form a three-dimensional structure through hydrosilylation addition reaction, has high phenyl content and high transparency and refractive index in gel, not only has silky skin feel of the traditional organic silicon elastomer, but also has excellent film-forming property of the silicon resin; according to the invention, by adjusting the hydrogen content, the vinyl content, the M/Q ratio and the like, the crosslinking strength among the components is improved, and a tightly crosslinked reticular structure can be formed, so that the formed elastomer gel has excellent film-forming property, and a high-transparency high-refraction film can be formed on the surface of skin; the high strength crosslinks of the present invention also prevent the loss of low viscosity carrier fluids.
2. the invention α -olefin to graft and modify the product of addition of phenyl hydrogen-containing MQ resin and phenyl vinyl MQ silicon resin, selects alpha-olefin with different chain lengths according to the chain length of grease in daily cosmetics, increases the grafting amount of linear alkyl in the gel, has good compatibility with the grease, can enable the grease to better penetrate into the three-dimensional structure of the organic silicon elastomer gel to form uniform gel, can also improve the cold and hot stability of the daily cosmetics, and solves the problem of compatibility distribution of carrier fluid and the grease in the daily cosmetics.
3. according to the invention, after hydrosilylation addition reaction of phenyl hydrogen-containing MQ resin and phenyl vinyl MQ silicon resin, grafting modification is carried out, the formation of a three-dimensional network structure of gel can be effectively controlled, the influence of the addition of a grafting modification material on a crosslinking point is prevented, meanwhile, a mode of slowly dripping α -olefin is adopted, the absolute excess of Si-H to the α -olefin in a reaction system is ensured, and the grafting efficiency of alkyl is improved.
4. Compared with the traditional organic silicon elastomer, the organic silicon elastomer gel has good transparency and film forming property, and simultaneously has small adhesive force to skin, and the skin does not have tight feeling after film forming, so that the formed stable film is easier to clean, the sticky feeling brought by components such as grease in daily cosmetics is reduced, and the silky feeling of the product is improved; the organic silicon elastomer gel can be compatible with daily chemical products in a wide range, and has good compatibility and compatibility.
Drawings
FIG. 1 is a diagram of a gel of a high-transparency high-refractive silicone elastomer according to example 1 of the present invention.
Detailed Description
The present invention is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.
A high-transparency high-refraction organic silicon elastomer gel is prepared from the following components in percentage by mass under the catalysis of a platinum catalyst:
wherein, the content of H in the phenyl hydrogen-containing MQ resin is 0.05 to 0.5 weight percent, and the M/Q is (0.5 to 1.5): 1, the viscosity of the phenyl hydrogen-containing MQ resin at 25 ℃ is 5.0-300.0 cSt;
the content of vinyl in the phenyl vinyl MQ silicon resin is 0.5-3.0 wt%, and M/Q is (0.5-1.5): 1; the number average molecular weight of the phenyl vinyl MQ silicon resin is 2000-10000.
The compatibility among the resins is determined by the M/Q ratio, and the strength of chemical bonds among the resins is influenced by the types of the functional groups, so that the mechanical property of the gel is influenced; by adjusting the hydrogen content, vinyl content, M/Q ratio and the like, the compatibility and crosslinking strength among resins can be improved, a tightly crosslinked network structure is formed, and the formed elastomer gel has excellent film forming property. The addition of high levels of phenyl groups with high refractive indices now improves the clarity and refractive index of the gel.
The carrier fluid is any one of cyclic siloxane, linear siloxane and isoparaffin. Specifically, the cyclic siloxane is selected from any one or more of hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane, and the linear siloxane is selected from any one or combination of polydimethylsiloxane with the viscosity of 1-50cp and phenyl silicone oil with the viscosity of 1-50 cp; the isoparaffin is one or two of isododecane and isohexadecane.
The carrier fluid in the silicone gel of the present invention can provide a mild initial feel and maintain product stability. Although the carrier fluid adopted by the invention has low viscosity and high fluidity, the tightly crosslinked network structure can better retain the carrier fluid and reduce the loss of the carrier fluid.
As a further preferred embodiment, the carrier fluid further comprises one or more of squalane, rose hip oil, nut oil, shea butter, aloe vera oil, olive oil.
the α -olefin has the carbon atom number of 8-18, preferably the α -olefin is one of 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene and 1-octadecene, the number of C in the α -olefin can be adjusted according to the composition of an oil phase in the added cosmetics, the grafting amount of linear alkyl in the gel is increased, the compatibility with grease is good, the grease can be better inserted into the three-dimensional structure of the organic silicon elastomer gel to form uniform gel, and meanwhile, the cold and hot stability of the daily cosmetics can be improved.
The platinum catalyst is isopropanol solution of chloroplatinic acid or vinyl platinum complex.
A preparation method of the high-transparency high-refraction organic silicon elastomer gel is characterized by comprising the steps of uniformly mixing phenyl hydrogen-containing MQ resin with carrier fluid, heating to 40-90 ℃, adding phenyl vinyl MQ silicon resin, uniformly stirring, adding platinum catalyst, uniformly stirring, preserving heat for 2-8 hours, heating to 90-100 ℃, dropwise adding α -olefin while stirring, preserving heat for 4-5 hours after dropwise adding is completed, and carrying out colloid milling on the obtained product to obtain the high-transparency high-refraction organic silicon elastomer gel.
The addition amount of the platinum catalyst is calculated by the concentration of metal platinum in a preparation system, and the concentration of the metal platinum in the preparation system is 5-20 ppm.
in order to reduce the side reaction of olefin self-addition polymerization, α -olefin is slowly dropped into the mixture by using a syringe pump, so that the absolute excess of Si-H bond to C-C bond in the system is ensured, and simultaneously, the olefin can be cut off to the gel as much as possible, thereby improving the grafting efficiency of the alkyl.
Example 1
A high-transparency high-refraction organic silicon elastomer gel is prepared from the following components in percentage by mass under the catalysis of a platinum catalyst: 20% phenyl hydrogen MQ resin, 9% phenyl vinyl MQ silicone resin, 69% decamethylcyclopentasiloxane, and 2% 1-decene;
wherein, the content of H in the phenyl hydrogen-containing MQ resin is 0.5 wt%, and M/Q is 1: 1, the viscosity of the phenyl hydrogen-containing MQ resin at 25 ℃ is 100 cSt; the content of vinyl in the phenyl vinyl MQ silicon resin is 2 wt%, and M/Q is 1: 1; the number average molecular weight of the phenyl vinyl MQ silicon resin is 5000.
This example high transparent high refractive silicone elastomer gel was prepared by the following method:
1) uniformly mixing the phenyl hydrogen-containing MQ resin and decamethylcyclopentasiloxane according to the formula amount, and heating to 40 ℃;
2) adding the phenyl vinyl MQ silicon resin with the formula amount into the mixture of 1), uniformly stirring, adding 5ppm of platinum catalyst, uniformly stirring, and keeping the temperature for 4 hours;
3) heating the mixture in the step 2) to 80 ℃, dropwise adding 1-decene with the formula amount while stirring, and preserving heat for 5 hours after dropwise adding; the obtained product is subjected to colloid milling to obtain the high-transparency high-refraction organic silicon elastomer gel.
The platinum catalyst of 5ppm means that the concentration of metal platinum in the total system for preparing the high-transparency high-refraction silicone elastomer gel is 5 ppm.
The high-transparency high-refraction silicone elastomer gel of the embodiment has good transparency and high light transmittance as shown in fig. 1.
Example 2
A high-transparency high-refraction organic silicon elastomer gel is prepared from the following components in percentage by mass under the catalysis of a platinum catalyst: 23% phenyl hydrogen MQ resin, 10% phenyl vinyl MQ silicone resin, 64% decamethylcyclopentasiloxane, and 3% 1-decene;
wherein, the content of H in the phenyl hydrogen-containing MQ resin is 0.3 wt%, and M/Q is 1: 1, the viscosity of the phenyl hydrogen-containing MQ resin at 25 ℃ is 100 cSt; the content of vinyl in the phenyl vinyl MQ silicon resin is 1 wt%, and M/Q is 1: 1; the number average molecular weight of the phenyl vinyl MQ silicon resin is 5000.
This example high transparent high refractive silicone elastomer gel was prepared by the following method:
1) uniformly mixing the phenyl hydrogen-containing MQ resin and decamethylcyclopentasiloxane according to the formula amount, and heating to 80 ℃;
2) adding the phenyl vinyl MQ silicon resin with the formula amount into the mixture of 1), uniformly stirring, adding 10ppm of platinum catalyst, uniformly stirring, and keeping the temperature for 8 hours;
3) heating the mixture in the step 2) to 90 ℃, dropwise adding 1-decene with the formula amount while stirring, and preserving heat for 4 hours after dropwise adding; the obtained product is subjected to colloid milling to obtain the high-transparency high-refraction organic silicon elastomer gel.
10ppm of platinum catalyst means that the concentration of metal platinum in the total system for preparing the high-transparency high-refractive silicone elastomer gel is 10 ppm.
Example 3
A high-transparency high-refraction organic silicon elastomer gel is prepared from the following components in percentage by mass under the catalysis of a platinum catalyst: 25% phenyl hydrogen MQ resin, 8% phenyl vinyl MQ silicone resin, 58% isododecane, 4% squalane, and 5% 1-dodecene;
wherein, the content of H in the phenyl hydrogen-containing MQ resin is 0.1 wt%, M/Q is 1: 1, the viscosity of the phenyl hydrogen-containing MQ resin at 25 ℃ is 100 cSt; the content of vinyl in the phenyl vinyl MQ silicon resin is 3 wt%, and M/Q is 1: 1; the number average molecular weight of the phenyl vinyl MQ silicon resin is 5000.
This example high transparent high refractive silicone elastomer gel was prepared by the following method:
1) uniformly mixing the phenyl hydrogen-containing MQ resin and isododecane according to the formula ratio, and heating to 60 ℃;
2) adding the phenyl vinyl MQ silicon resin with the formula amount into the mixture of 1), uniformly stirring, adding 20ppm of platinum catalyst, uniformly stirring, and keeping the temperature for 6 hours;
3) heating the mixture in the step 2) to 100 ℃, dropwise adding 1-dodecene with the formula amount while stirring, and preserving heat for 4 hours after dropwise adding; the obtained product is subjected to colloid milling to obtain the high-transparency high-refraction organic silicon elastomer gel.
By 20ppm of platinum catalyst is meant that the concentration of metallic platinum in the total system for the preparation of the high transparent high refractive silicone elastomer gel is 20 ppm.
Example 4
A high-transparency high-refraction organic silicon elastomer gel is prepared from the following components in percentage by mass under the catalysis of a platinum catalyst: 23% of phenyl hydrogen-containing MQ resin, 10% of phenyl vinyl MQ silicon resin, 55% of octamethylcyclotetrasiloxane, 9% of shea butter and 3% of 1-octene;
wherein, the content of H in the phenyl hydrogen-containing MQ resin is 0.3 wt%, and M/Q is 1: 1, the viscosity of the phenyl hydrogen-containing MQ resin at 25 ℃ is 10 cSt; the content of vinyl in the phenyl vinyl MQ silicon resin is 1 wt%, and M/Q is 1: 1; the number average molecular weight of the phenyl vinyl MQ silicone resin is 2000.
The preparation method of the high-transparency high-refraction silicone elastomer gel of the embodiment is the same as that of the embodiment 2, and the details are not repeated here.
Example 5
A high-transparency high-refraction organic silicon elastomer gel is prepared from the following components in percentage by mass under the catalysis of a platinum catalyst: 23% of phenyl hydrogen-containing MQ resin, 10% of phenyl vinyl MQ silicon resin, 64% of phenyl silicone oil and 3% of 1-tetradecene;
wherein, the content of H in the phenyl hydrogen-containing MQ resin is 0.3 wt%, and M/Q is 1: 1, the viscosity of the phenyl hydrogen-containing MQ resin at 25 ℃ is 300 cSt; the content of vinyl in the phenyl vinyl MQ silicon resin is 1 wt%, and M/Q is 1: 1; the number average molecular weight of the phenyl vinyl MQ silicon resin is 10000; the viscosity of the phenyl silicone oil was 45 cp.
The preparation method of the high-transparency high-refraction silicone elastomer gel of the embodiment is the same as that of the embodiment 2, and the details are not repeated here.
Comparative example 1
The organic silicon elastomer gel is prepared from the following components in percentage by mass under the catalysis of a platinum catalyst: 23% of phenyl hydrogen-containing MQ resin, 10% of phenyl vinyl MQ silicon resin and 67% of decamethylcyclopentasiloxane;
wherein, the content of H in the phenyl hydrogen-containing MQ resin is 0.3 wt%, and M/Q is 1: 1, the viscosity of the phenyl hydrogen-containing MQ resin at 25 ℃ is 100 cSt; the content of vinyl in the phenyl vinyl MQ silicon resin is 1 wt%, and M/Q is 1: 1; the number average molecular weight of the phenyl vinyl MQ silicon resin is 5000.
The silicone elastomer gel of this comparative example was prepared by the following method:
1) uniformly mixing the phenyl hydrogen-containing MQ resin and decamethylcyclopentasiloxane according to the formula amount, and heating to 80 ℃;
2) adding the phenyl vinyl MQ silicon resin with the formula amount into the mixture of 1), uniformly stirring, adding 10ppm of platinum catalyst, uniformly stirring, and keeping the temperature for 8 hours; and (3) carrying out colloid milling on the obtained product to obtain the high-transparency high-refraction organic silicon elastomer gel.
10ppm of platinum catalyst means that the concentration of metal platinum in the total system for preparing the high-transparency high-refractive silicone elastomer gel is 10 ppm.
Comparative example 2
The silicone elastomer gel of this comparative example was a commercially available product, BT-9055 silicone elastomer gel.
Test example
The silicone elastomer gels of examples 1 to 5 and comparative examples 1 to 2 were subjected to performance tests, and the results are shown in table 1. Wherein, the light transmittance is measured by an ultraviolet spectrophotometer within the range of 400-700 nm;
compatibility: the silicone elastomer gels of examples 1 to 5 and comparative examples 1 to 2 were mixed with caprylic/capric Glyceride (GTCC) in a mass ratio of 10:3 (a ratio commonly used in cosmetic formulations), and the compatibility of the silicone elastomer gel with a cosmetic-common oil was observed;
the refractive index was measured by an Abel refractometer at 25 ℃.
Table 1 silicone elastomer gel performance test table
As can be seen from Table 1, the silicone elastomer gel of the embodiment of the invention has good transparency, high light transmittance and refractive index, and good film forming property, and can have good touch and visual effects when used in daily cosmetics. The organic silicon elastomer gel disclosed by the embodiment of the invention has good compatibility with grease, and after being mixed with caprylic/capric glyceride, the mixture is not obviously changed, and the mixture has high transparency and is uniformly bonded; when the gels of comparative examples 1 and 2 were mixed with caprylic/capric glyceride, the viscosity of the gels was reduced to some extent, a partially flowing liquid was present, and the mixture was cloudy as a whole, i.e., the compatibility was relatively poor.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the scope of the present invention claimed in the present invention.
Claims (10)
1. The high-transparency high-refraction silicone elastomer gel is characterized by being prepared from the following components in percentage by mass under the catalysis of a platinum catalyst:
the carrier fluid is any one of cyclic siloxane, linear siloxane and isoparaffin.
2. The high-transparency high-refractive silicone elastomer gel as claimed in claim 1, wherein the content of H in the phenyl hydrogen-containing MQ resin is 0.05 to 0.5 wt%, and M/Q is (0.5 to 1.5): 1; the phenyl hydrogen-containing MQ resin has the viscosity of 5.0-300.0cSt at 25 ℃.
3. The high transparent high refractive silicone elastomer gel according to claim 1, wherein the vinyl content in the phenyl vinyl MQ silicone resin is 0.5 to 3.0 wt%, and M/Q is (0.5 to 1.5): 1.
4. the high transparent high refractive silicone elastomer gel according to claim 3, wherein the number average molecular weight of the phenyl vinyl MQ silicone resin is 2000 to 10000.
5. The high-transparency high-refraction silicone elastomer gel according to claim 1, wherein the cyclic siloxane is any one or more of hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane; the straight chain siloxane is one or the combination of two of polydimethylsiloxane with the viscosity of 1-50cp and phenyl silicone oil with the viscosity of 1-50 cp; the isoparaffin is one or two of isododecane and isohexadecane.
6. The high transparency high refractive silicone elastomer gel according to claim 1, wherein the carrier fluid further comprises one or more of squalane, rosehip oil, nut oil, shea butter, aloe vera oil, olive oil.
7. the high transparent high refractive silicone elastomer gel according to claim 1, wherein the number of carbon atoms in the α -olefin is from 8 to 18.
8. The high transparent high refractive silicone elastomer gel according to claim 1, wherein the platinum catalyst is an isopropyl alcohol solution of chloroplatinic acid or a vinyl platinum complex.
9. A method for preparing the high-transparency high-refraction silicone elastomer gel according to any one of claims 1 to 8, which is characterized by comprising the steps of uniformly mixing phenyl hydrogen-containing MQ resin with a carrier fluid, heating to 40-90 ℃, adding phenyl vinyl MQ silicone resin, uniformly stirring, adding a platinum catalyst, uniformly stirring, preserving heat for 2-8 hours, heating to 90-100 ℃, dropwise adding α -olefin while stirring, preserving heat for 4-5 hours after dropwise adding is completed, and carrying out colloid milling on the obtained product to obtain the high-transparency high-refraction silicone elastomer gel.
10. The method for preparing a high-transparency high-refractive silicone elastomer gel according to claim 9, wherein the platinum catalyst is added in an amount calculated as the concentration of platinum metal in the preparation system, and the concentration of platinum metal in the preparation system is 5 to 20 ppm.
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Application publication date: 20200602 |