Highly transparent silicone and silicone lens

Abstract

The present application relates to the field of organosilicon material technology, and specifically provides a high-transmittance silicone and silicone lens. The high-transmittance silicone of the present application, calculated by weight, comprises the following raw materials: 100 parts of methyl vinyl polysiloxane, 10-100 parts of hydrogenated silicone oil, 10-100 parts of VMQ silicone resin, 0.1-1 part of Pt catalyst and 0.01-1 part of inhibitor. The VMQ silicone resin is composed of a first VMQ silicone resin and a second VMQ silicone resin in a weight ratio of 1:5-5:1, and the second VMQ silicone resin contains ω-long-chain alkenyl siloxy chain segments. The high-transmittance silicone of the present application also has good tear resistance while maintaining high transmittance.

Description

Technical Field

[0001] The present application relates to the technical field of organic silicon materials, and in particular to a highly light-transmittance silicone rubber and a silicone rubber lens. Background Art

[0002] The light transmittance of high-transmittance silicone is typically above 92%, and can even reach over 95%. To achieve this high transmittance, high-transmittance silicone typically uses silicone resin as a reinforcing filler rather than silica. Using silicone resin as a reinforcing filler achieves high tensile strength, but the tear strength is low, typically no higher than 18 kN / m. To increase the tear strength of high-transmittance silicone, other materials are often added. However, since these materials are not fully compatible with the silicone material, the light transmittance is reduced. Summary of the Invention

[0003] In order to solve the technical problem of low tear strength of high-transmittance silicone in the prior art, the present application provides a high-transmittance silicone and a silicone lens.

[0004] This application adopts the following technical solutions:

[0005] A high-transmittance silica gel comprises the following raw materials in parts by weight: 100 parts of methyl vinyl polysiloxane, 10-100 parts of hydrogenated silicone oil, 10-100 parts of VMQ silicone resin, 0.1-1 part of Pt catalyst and 0.01-1 part of inhibitor.

[0006] The VMQ silicone resin is composed of a first VMQ silicone resin and a second VMQ silicone resin in a weight ratio of 1:5-5:1;

[0007] The V chain segment in the first VMQ silicone resin is CH2=CHCH3CH3SiO 1 / 2 , the vinyl content of the first VMQ silicone resin is 0.3-5wt%;

[0008] The V chain segment in the second VMQ silicone resin is R 1 CH3CH3SiO 1 / 2 , R 1 The general formula is CH2=CH(CH2) n -, n=5-28, the carbon-carbon unsaturated double bond content in the second VMQ silicone resin is 0.1-2wt%.

[0009] Preferably, the weight ratio of the first VMQ silicone resin to the second VMQ silicone resin is 1:2-5:1.

[0010] Preferably, the second VMQ silicone resin is of the general formula CH2=CH(CH2) n (CH3)2Si(OR 2) is obtained by hydrolysis condensation reaction of silane, hexamethyldisiloxane and water glass, R 2 Selected from C1-C4 alkyl, n=5-28.

[0011] Preferably, the difference between the vinyl content in the first VMQ silicone resin and the carbon-carbon unsaturated double bond content in the second VMQ silicone resin is not less than 0.6 wt %.

[0012] Preferably, the vinyl content of the methylvinyl polysiloxane is 0.03-0.6 wt %.

[0013] Preferably, potassium hydroxide or potassium siloxane alcohol is used as a catalyst in the preparation process of the methylvinylpolysiloxane.

[0014] Preferably, the viscosity of the hydrogen-containing silicone oil at 25° C. is 200-5000 mPa.s, and the hydrogen content is 0.1-0.8 wt %.

[0015] A silicone lens is composed of the high-transmittance silicone described in any one of the above embodiments and an anti-reflection film, wherein the anti-reflection film is located on the surface of the high-transmittance silicone.

[0016] Preferably, the thickness of the antireflection film is 0.01-1 μm.

[0017] Preferably, the material of the antireflection film is one or a combination of silicon dioxide, silicon oxide, aluminum oxide, calcium fluoride and magnesium fluoride.

[0018] In summary, this application has the following beneficial effects:

[0019] 1. This application uses two different VMQ silicone resins as reinforcing fillers. The two different VMQ silicone resins have different alkenyl chain lengths, which can form different cross-linking densities and form a "concentrated cross-linking" effect, which can improve the tear strength of the high-transmittance silicone resin.

[0020] 2. The two VMQ silicone resins of the present application have different contents of unsaturated carbon-carbon double bonds, which can further form "centralized cross-linking" to further improve the tear strength of the high-transmittance silicone resin.

[0021] 3. The silicone lens of the present application has a layer of anti-reflection film coated on the surface of the high-transmittance silicone by PVD evaporation, which further improves the light transmittance compared to the high-transmittance silicone. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below.

[0023] Throughout this specification, unless otherwise specified, the terms used herein should be understood as having the same meaning as commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In the event of any conflict, the present specification shall take precedence.

[0024] On the one hand, the present application proposes a highly transparent silica gel, which comprises the following raw materials in parts by weight: 100 parts of methyl vinyl polysiloxane, 10-100 parts of hydrogenated silicone oil, 10-100 parts of VMQ silicone resin, 0.1-1 part of Pt catalyst and 0.01-1 part of inhibitor.

[0025] The VMQ silicone resin is composed of a first VMQ silicone resin and a second VMQ silicone resin in a weight ratio of 1:5-5:1; in the first VMQ silicone resin and the second VMQ silicone resin, M represents a monofunctional (CH3)3SiO 1 / 2 Chain link, Q represents a tetrafunctional SiO 4 / 2 chain link.

[0026] The V chain in the first VMQ silicone resin (i.e. vinyl VMQ) is CH2=CHCH3CH3SiO 1 / 2 The vinyl content in the first VMQ silicone resin is 0.3-5wt%; the first VMQ can be obtained by hydrolysis condensation reaction of divinyltetramethyldisiloxane, hexamethyldisiloxane (or trimethylmethoxysilane), and water glass (or ethyl orthosilicate).

[0027] The V link in the second VMQ silicone resin is R 1 CH3CH3SiO 1 / 2 , R 1 The general formula is CH2=CH(CH2) n -, n=5-28, the carbon-carbon unsaturated double bond content in the second VMQ silicone resin is 0.1-2 wt %. Preferably, n=6-20, for example, n can be 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, etc.

[0028] In the high-transmittance silicone rubber of the present application, two VMQ silicone resins containing terminal olefin groups of different chain lengths are used as reinforcing fillers, which not only play a reinforcing role, but also because olefin groups of different chain lengths can form different cross-linking densities, the obtained high-transmittance silicone rubber has a centralized cross-linking effect, thereby improving the tear strength of the silicone rubber.

[0029] In a preferred embodiment of the present application, the weight ratio of the first VMQ silicone resin to the second VMQ silicone resin is 1:2-5:1. For example, the weight ratio of the first VMQ silicone resin to the second VMQ silicone resin can be 1:2, 1:1.5, 1:1, 1.5:1, 2:1, 2.5:1, 3:1, 3.5:1, 4:1, 4.5:1 or 5:1.

[0030] In a preferred embodiment of the present application, the second VMQ silicone resin is of the general formula CH2=CH(CH2) n (CH3)2Si(OR 2 ) is obtained by hydrolysis condensation reaction of silane, hexamethyldisiloxane and water glass (or ethyl orthosilicate), R 2 is selected from C1-C4 alkyl, and n has the same meaning as above. Specifically, the condensation reaction for preparing the second VMQ silicone resin can be exemplified as follows: weighing water, anhydrous ethanol, hexamethyldisiloxane, CH2=CH(CH2) n (CH3)2Si(OCH3)silane and concentrated hydrochloric acid are mixed and stirred thoroughly, and ethyl orthosilicate is slowly added dropwise at room temperature. After the addition is complete, the mixture is reacted at 75-80°C for 3 hours. Hexamethyldisiloxane is added for extraction, the aqueous layer is removed, and the organic layer is washed with water until neutral. The mixture is heated under reflux for 2 hours to remove the hexamethyldisiloxane and low-boiling substances to obtain a liquid product. Among the raw materials used in the above reaction, the weight proportion of hydrochloric acid in the reaction system is 4.2wt%, the weight proportion of anhydrous ethanol in the reaction system is 2wt%, and the weight proportion of CH2=CH(CH2) is 1. n The molar ratio of (CH3)2Si(OCH3)silane and hexamethyldisiloxane can be set as needed, CH2=CH(CH2) n The ratio of the sum of the moles of (CH3)2Si(OCH3)silane and hexamethyldisiloxane to the mole of ethyl orthosilicate is 1.2:1, and the molar ratio of water to ethyl orthosilicate is 0.8:1.

[0031] In the present application, the form of the first VMQ silicone resin and the second VMQ silicone resin is not particularly limited and can be either liquid or solid. When the first VMQ silicone resin and the second VMQ silicone resin are liquid, they can be directly added to the raw material components of the high-transmittance silica gel. When the VMQ is solid, it can be first dissolved in a solvent (such as toluene, xylene, petroleum ether, etc.) and then added to the raw material components of the high-transmittance silica gel, and then the solvent can be removed.

[0032] In a preferred embodiment of the present application, the difference between the vinyl content in the first VMQ silicone resin and the carbon-carbon unsaturated double bond content in the second VMQ silicone resin is not less than 0.6wt%. There is a certain difference between the vinyl content in the first VMQ silicone resin and the carbon-carbon unsaturated double bond content in the second VMQ silicone resin, which can further promote the effect of forming concentrated cross-linking in the high-transmittance silicone rubber and further improve the tear resistance. More preferably, the difference between the vinyl content in the first VMQ silicone resin and the carbon-carbon unsaturated double bond content in the second VMQ silicone resin is not less than 0.7wt%. It can be that the vinyl content in the first VMQ silicone resin is higher than the carbon-carbon unsaturated double bond content in the second VMQ silicone resin, or it can be that the vinyl content in the first VMQ silicone resin is lower than the carbon-carbon unsaturated double bond content in the second VMQ silicone resin. For example, the difference can be 0.7wt%, 0.72wt%, 0.74wt%, 0.76wt%, 0.78wt%, 0.8wt%, 0.82wt%, 0.85wt%, 0.88wt%. t%, 0.9wt%, 0.92wt%, 0.93wt%, 0.95wt%, 0.97wt%, 1wt%, 1.02wt%, 1.05wt%, 1.08wt%, 1.1wt%, 1.12wt%, 1.15wt%, 1.17wt% , 1.2wt%, 1.23wt%, 1.25wt%, 1.27wt%, 1.3wt%, 1.32wt%, 1.35wt%, 1.37wt%, 1.4wt%, 1.42wt%, 1.45wt%, 1.48wt%, 1.5wt%, etc.

[0033] In a preferred embodiment of the present application, the vinyl content of the methyl vinyl polysiloxane is 0.03-0.6 wt %, and more preferably, the vinyl content of the methyl vinyl polysiloxane is 0.05-0.5 wt %.

[0034] In a preferred embodiment of the present application, potassium hydroxide or potassium siloxane alcoholate is used as a catalyst in the preparation process of methyl vinyl polysiloxane. There are two commonly used catalysts for the preparation of methyl vinyl polysiloxane. One is tetramethylammonium hydroxide and its siloxane alcohol salts, which are very easy to absorb water and yellow, resulting in the color of the obtained methyl vinyl silicone rubber being yellowish, and the end groups will have some hydroxyl groups. The polarity of hydroxyl groups is high, which will lead to poor compatibility in silica gel, affecting light transmittance; the other is potassium hydroxide and its siloxane alcohol salts, which have lower water absorption than tetramethylammonium hydroxide and its siloxane alcohol salts. The methyl vinyl silicone rubber obtained has fewer end group hydroxyl groups and will not yellow, so highly transparent silica gel can be obtained. The method for preparing methyl vinyl silicone rubber using potassium siloxane is as follows: 1.5 parts by weight of tetramethyldivinyldisiloxane and 100 parts of octamethylcyclotetrasiloxane are added to a container, the temperature is raised to 50° C., the pressure is reduced to -0.05 MPa for dehydration, and after the dehydration is completed, nitrogen is introduced, the temperature is raised to 120° C., 1 part of 1 wt% potassium siloxane is added, the temperature is further raised to 160-170° C., and the reaction is carried out for 4 hours. A phosphate neutralizer is added for neutralization, and low-boiling substances are removed under reduced pressure to obtain the product.

[0035] More preferably, the methylvinyl polysiloxane of the present application can be treated with dimethylvinyl chlorosilane to reduce the hydroxyl content as much as possible. In the present application, the molecular weight of the methylvinyl polysiloxane is not particularly limited and can be not less than 100,000, and can be in a high viscosity and difficult to flow state at room temperature, commonly known as methylvinyl silicone rubber. It can also be in a liquid state at room temperature, such as a viscosity (25°C) of 1000-6000mPa.s, or further, a viscosity (25°C) of 2000-5000mPa.s. The liquid methylvinyl polysiloxane can be a double-terminal vinyl polysiloxane, that is, the vinyl group is only at the end group of the polysiloxane, not on the side chain.

[0036] In a preferred embodiment of the present application, the viscosity of the hydrogen-containing silicone oil at 25° C. is 200-5000 mPa.s, and the hydrogen content is 0.1-0.8 wt %. More preferably, the viscosity of the hydrogen-containing silicone oil at 25° C. is 500-3500 mPa.s, and the hydrogen content is 0.15-0.6 wt %.

[0037] The high-transmittance silicone rubber of the present application can be prepared as follows: VMQ silicone resin is added to methyl vinyl polysiloxane and dissolved uniformly, hydrogenated silicone oil and an inhibitor are added and mixed uniformly, and finally a Pt catalyst is added and mixed uniformly. When the methyl vinyl polysiloxane is methyl vinyl silicone raw rubber, the high-transmittance silicone rubber can be formed using processes such as extrusion molding and compression molding. When the methyl vinyl silicone raw rubber is liquid at room temperature, the high-transmittance silicone rubber can be formed using an injection molding process.

[0038] Another aspect of this application is a silicone lens comprising the high-transmittance silicone described in any of the aforementioned embodiments and an anti-reflection film, the anti-reflection film being located on the surface of the high-transmittance silicone. Specifically, the silicone lens of this application comprises an anti-reflection film coated on the surface of the high-transmittance silicone, using methods such as PVD, sol-gel, etc. To achieve a smooth surface for the silicone lens, for example, when injection molding is used, the mold cavity surface roughness is preferably between 0.01 and 0.04 μm.

[0039] In a preferred embodiment of the present application, the thickness of the antireflection film is 0.01-1 μm. More preferably, the thickness of the antireflection film is 0.03-0.5 μm.

[0040] In a preferred embodiment of the present application, the material of the antireflection film is one or a combination of silicon dioxide, silicon oxide, aluminum oxide, calcium fluoride and magnesium fluoride.

[0041] The technical solution of the present application will be described in detail below with reference to embodiments and comparative examples.

[0042] Preparation Example 1

[0043] According to the raw material ratio, the weight proportion of hydrochloric acid in the reaction system is 4.2wt%, the weight proportion of anhydrous ethanol in the reaction system is 2wt%, the molar ratio of ω-dodecenyldimethylmethoxysilane and hexamethyldisiloxane is 0.12:1, the ratio of the sum of the moles of ω-dodecenyldimethylmethoxysilane and hexamethyldisiloxane to the mole number of tetraethyl orthosilicate is 1.2:1, and the molar ratio of water to tetraethyl orthosilicate is 0.8:1.

[0044] Water, anhydrous ethanol, hexamethyldisiloxane, ω-dodecenyldimethylmethoxysilane and concentrated hydrochloric acid were mixed and stirred thoroughly, and ethyl orthosilicate was slowly added dropwise at room temperature. The mixture was reacted at 75-80°C for 3 hours after the addition was completed. Hexamethyldisiloxane with a volume of 50 times that of anhydrous ethanol was added for extraction, and the aqueous layer was removed. The organic layer was washed with water until neutral, and the mixture was heated under reflux for 2 hours. The hexamethyldisiloxane was removed under normal pressure and the low-boiling substances were removed under reduced pressure to obtain a colorless transparent liquid second VMQ silicone resin. The viscosity (25°C) was measured to be 7600 mPa.s and the alkenyl content was 1.18 wt%.

[0045] Preparation Example 2

[0046] In Preparation Example 1, the molar ratio of ω-dodecenyldimethylmethoxysilane and hexamethyldisiloxane was adjusted to 0.05:1, and the other steps remained unchanged to obtain a colorless, transparent liquid second VMQ silicone resin with a measured viscosity (25°C) of 9200 mPa.s and an alkenyl content of 0.53 wt%.

[0047] Preparation Example 3

[0048] In Preparation Example 1, ω-dodecenyldimethylmethoxysilane was replaced by ω-eicosenyldimethylchlorosilane, the molar ratio of ω-eicosenyldimethylchlorosilane to hexamethyldisiloxane was 0.2: 1, and the other steps remained unchanged to obtain a colorless, transparent liquid second VMQ silicone resin, the viscosity (25 ° C) was measured to be 3700 mPa.s, and the alkenyl content was 1.76 wt%.

[0049] Preparation Example 4

[0050] In Preparation Example 3, the molar ratio of ω-eicosenyldimethylsilyl chloride and hexamethyldisiloxane was adjusted to 0.03:1, and the other steps remained unchanged to obtain a colorless transparent liquid second VMQ silicone resin with a measured viscosity (25°C) of 12200 mPa.s and an alkenyl content of 0.32 wt%.

[0051] Example 1

[0052] According to 100 parts of vinyl-terminated liquid polydimethylsiloxane (vinyl content 0.21 wt%, potassium siloxane is used as a catalyst in the preparation), 25 parts of hydrogenated silicone oil (viscosity 1260 mPa.s at 25°C, hydrogen content 0.15 wt%), 20 parts of vinyl VMQ silicone resin (viscosity 4200 cP at 25°C, vinyl content 1.0 wt%), 20 parts of the second VMQ silicone resin of Preparation Example 1, 0.3 parts of Karstedt catalyst, and 0.1 parts of 2-methyl-3-butyn-2-ol, the vinyl VMQ and the second VMQ silicone resin are added to the vinyl-terminated liquid polydimethylsiloxane, stirred to dissolve completely, the hydrogenated silicone oil and 2-methyl-3-butyn-2-ol are added, mixed evenly, and finally the Karstedt catalyst is added and mixed evenly to obtain liquid silica gel.

[0053] Example 2

[0054] In Example 1, the second VMQ silicone resin of Preparation Example 1 was replaced by the second VMQ silicone resin of Preparation Example 3 in equal parts by weight, the molar ratio of Si—H and vinyl groups was maintained unchanged, and the remaining steps remained unchanged.

[0055] Example 3

[0056] In Example 1, the second VMQ silicone resin of Preparation Example 1 was replaced by the second VMQ silicone resin of Preparation Example 4 in equal parts by weight, the molar ratio of Si—H and vinyl groups was maintained unchanged, and the remaining steps remained unchanged.

[0057] Example 4

[0058] The vinyl-terminated liquid polydimethylsiloxane in Example 1 was pre-treated with vinyldimethylsilyl chloride, and the remaining steps remained unchanged. The specific treatment process was as follows: vinyl-terminated liquid polydimethylsiloxane and vinyldimethylsilyl chloride were added to a kneader at a weight ratio of 100:0.2, stirred at room temperature for 2 hours, heated to 80°C, and stirred for another hour. The pressure was then reduced to below -0.099 MPa, low-boiling substances were removed, and the mixture was cooled to obtain the product.

[0059] Comparative Example 1

[0060] In Example 1, the vinyl VMQ silicone resin was replaced by an equal weight portion of a second VMQ silicone resin, the molar ratio of Si—H to vinyl was maintained unchanged, and the remaining steps remained unchanged.

[0061] Comparative Example 2

[0062] In Example 1, the second VMQ silicone resin was replaced by an equal weight portion of vinyl VMQ silicone resin, the molar ratio of Si—H to vinyl was maintained unchanged, and the remaining steps remained unchanged.

[0063] The liquid silicone rubbers of Examples 1-4 and Comparative Examples 1 and 2 were molded using an injection molding process, and the surface roughness of the mold cavity was 0.2 μm.

[0064] Example 5

[0065] A thin silicon dioxide layer with an average thickness of 0.086 μm was attached to the surface of the molded silica gel in Example 1 by using a PVD vapor deposition method.

[0066] Example 6

[0067] A magnesium fluoride thin layer with an average thickness of 0.092 μm was attached to the surface of the molded silica gel in Example 2 by using a PVD vapor deposition method.

[0068] Example 7

[0069] According to 100 parts of methyl vinyl silicone rubber (vinyl content 0.15 wt%, potassium siloxane is used as a catalyst in the preparation), 36 parts of hydrogenated silicone oil (viscosity 1260 mPa.s at 25°C, hydrogen content 0.15 wt%), 40 parts of vinyl VMQ silicone resin (viscosity 5000 cP at 25°C, vinyl content 1.5 wt%), 20 parts of the second VMQ silicone resin of Preparation Example 2, 0.4 parts of Karstedt catalyst, and 0.1 parts of 2-methyl-3-butyn-2-ol, the vinyl VMQ and the second VMQ silicone resin are added to the methyl vinyl silicone rubber, and the mixture is mixed evenly on a three-roll mill. The hydrogenated silicone oil and 2-methyl-3-butyn-2-ol are added and mixed evenly. Finally, the Karstedt catalyst is added and mixed evenly to obtain solid silica gel.

[0070] Example 8

[0071] In Example 7, the vinyl VMQ silicone resin was adjusted to 30 parts, the second VMQ silicone resin was adjusted to 30 parts, the molar ratio of Si-H and vinyl was maintained unchanged, and the other steps remained unchanged.

[0072] Example 9

[0073] In Example 7, the vinyl VMQ silicone resin was adjusted to 20 parts, the second VMQ silicone resin was adjusted to 40 parts, the molar ratio of Si-H and vinyl was maintained unchanged, and the other steps remained unchanged.

[0074] Example 10

[0075] In Example 7, the vinyl VMQ silicone resin was adjusted to 12 parts, the second VMQ silicone resin was adjusted to 48 parts, the molar ratio of Si-H and vinyl was maintained unchanged, and the other steps remained unchanged.

[0076] Comparative Example 3

[0077] In Example 7, the vinyl VMQ silicone resin was adjusted to 7 parts, the second VMQ silicone resin was adjusted to 53 parts, the molar ratio of Si-H and vinyl was maintained unchanged, and the other steps remained unchanged.

[0078] Comparative Example 4

[0079] In Example 7, the vinyl VMQ silicone resin was adjusted to 53 parts, the second VMQ silicone resin was adjusted to 7 parts, the molar ratio of Si-H and vinyl was maintained unchanged, and the other steps remained unchanged.

[0080] The solid silica gels of Examples 7-10 and Comparative Examples 3 and 4 were formed using an extrusion molding process.

[0081] Performance Testing

[0082] Tensile strength: tested according to the method of GB / T528-2009.

[0083] Tear strength: tested according to the method of GB / T529-2008.

[0084] Light transmittance: 1mm thick sample, tested by UV-Vis spectrophotometer, test wavelength 500nm.

[0085] The results are shown in Table 1 below.

[0086] Table 1

[0087]

[0088]

[0089] It can be seen from the results in Table 1 that the high-transmittance silicone rubber of the present application has good tensile strength, transmittance and tear resistance, and after adding an anti-reflection film on the high-transmittance silicone rubber, the transmittance can be further improved.

[0090] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A highly transparent silica gel, characterized in that: The invention comprises the following raw materials in parts by weight: 100 parts of methyl vinyl polysiloxane, 10-100 parts of hydrogenated silicone oil, 10-100 parts of VMQ silicone resin, 0.1-1 part of Pt catalyst and 0.01-1 part of inhibitor; the VMQ silicone resin is composed of a first VMQ silicone resin and a second VMQ silicone resin in a weight ratio of 1:5-5:1, wherein the V chain segment in the first VMQ silicone resin is CH2=CHCH3CH3SiO 1 / 2 , the vinyl content of the first VMQ silicone resin is 0.3-5wt%; The V chain segment in the second VMQ silicone resin is R 1 CH3CH3SiO 1 / 2 , R 1 The general formula is CH2=CH(CH2) n -, n=5-28, the carbon-carbon unsaturated double bond content in the second VMQ silicone resin is 0.1-2wt%; The second VMQ silicone resin is of the general formula CH2=CH(CH2) n (CH3)2Si(OR 2 ) is obtained by hydrolysis condensation reaction of silane, hexamethyldisiloxane and water glass, R 2 Selected from C1-C4 alkyl, n=5-28; The difference between the vinyl content in the first VMQ silicone resin and the carbon-carbon unsaturated double bond content in the second VMQ silicone resin is not less than 0.6 wt %; The vinyl content of the methyl vinyl polysiloxane is 0.03-0.6wt%; In the preparation process of the methyl vinyl polysiloxane, potassium hydroxide or potassium siloxane alcohol is used as a catalyst; The hydrogen-containing silicone oil has a viscosity of 200-5000 mPa·s at 25° C. and a hydrogen content of 0.1-0.8 wt %.

2. A silicone lens, characterized in that: It is composed of the high-transmittance silicone rubber according to claim 1 and an anti-reflection film, and the anti-reflection film is located on the surface of the high-transmittance silicone rubber.

3. The silicone lens according to claim 2, characterized in that: The thickness of the antireflection film is 0.01-1 μm.

4. The silicone lens according to claim 2, wherein: The material of the antireflection film is one or a combination of silicon dioxide, aluminum oxide, calcium fluoride and magnesium fluoride.

Images