Organosilicone adhesive composition, optical transparent film and preparation method and application thereof

Abstract

The invention discloses an organic silicon adhesive composition, an optical transparent film as well as a preparation method and application of the optical transparent film, and belongs to the technical field of organic silicon adhesives. The organic silicon adhesive composition comprises a component A and a component B, the component A comprises the following raw materials: first vinyl silicone oil, vinyl silicone resin, a silane coupling agent and a catalyst; the component B comprises the following raw materials: second vinyl silicone oil, a chain extender, a cross-linking agent, an inhibitor and an ultraviolet light blocking agent; the chain extender comprises end hydrogen-containing silicone oil; the cross-linking agent comprises end-side hydrogen-containing silicone oil. According to the organic silicon adhesive composition, the ultraviolet blocking agent is used for the organic silicon adhesive composition, meanwhile, the cross-linking agent is added, formation of a cross-linked network in an organic silicon system is promoted, the organic silicon adhesive composition with excellent ultraviolet blocking performance, optical performance and mechanical performance can be prepared, and the organic silicon adhesive composition can be used for a display screen and meets the outdoor use requirement of the display screen.

Description

Technical Field

[0001] The present application relates to the technical field of organic silicone adhesives, and in particular to an organic silicone adhesive composition, an optically transparent film, and a preparation method and application thereof. Background Art

[0002] Silicone optical adhesive has extremely high light transmittance, with a total light transmittance of up to 99%; good weather resistance and temperature resistance, able to maintain stable performance under a wide range of environmental conditions and not prone to yellowing; and high adhesion, playing an important role in the manufacture of touch screens and other optical components.

[0003] With the development of society, electronic display screens have spread to various fields, including automobiles, industrial control, medical treatment, military, ships, aviation, etc. Display screens are usually used in display screens, such as OLED, LCD, TFT, etc. When the display screen is used outdoors, the ultraviolet rays in the sunlight will accelerate the aging of the polarizer, causing the screen brightness to decrease and become black and red. In order to delay or avoid the degradation of performance caused by the aging of the polarizer, the traditional method is generally to stick an anti-UV protective film on the surface of the screen. However, sticking an anti-UV protective film will affect the visual effect, and its ability to resist ultraviolet light will slowly decay as the use time increases. Summary of the invention

[0004] Based on this, the main purpose of this application is to provide an organic silicone adhesive composition with excellent ultraviolet blocking properties, optical properties and mechanical properties, which can be used for display screens to meet their outdoor use requirements.

[0005] In a first aspect of the present application, there is provided an organic silicone adhesive composition, comprising component A and component B;

[0006] The component A comprises the following raw materials: a first vinyl silicone oil, a vinyl silicone resin, a silane coupling agent and a catalyst;

[0007] The component B comprises the following raw materials: a second vinyl silicone oil, a chain extender, a cross-linking agent, an inhibitor and an ultraviolet light blocking agent;

[0008] The chain extender includes terminal hydrogen-containing silicone oil; the cross-linking agent includes terminal side hydrogen-containing silicone oil.

[0009] In some embodiments, the component A comprises the following raw materials in parts by weight: 20-80 parts of a first vinyl silicone oil, 5-30 parts of a vinyl silicone resin, 1-5 parts of a silane coupling agent, and 1-2 parts of a catalyst;

[0010] The component B comprises the following raw materials in parts by weight: 10-40 parts of a second vinyl silicone oil, 10-30 parts of a chain extender, 1-10 parts of a cross-linking agent, 1-2 parts of an inhibitor and 0.5-5 parts of an ultraviolet light blocking agent.

[0011] In some embodiments, the vinyl content of the first vinyl silicone oil and the second vinyl silicone oil is independently 0.06-0.43 wt %;

[0012] and / or the vinyl content of the vinyl silicone resin is 0.9-1.9wt%;

[0013] and / or the hydrogen content of the hydrogen-terminated silicone oil is 0.02-0.5wt%;

[0014] And / or the hydrogen content of the end side hydrogen-containing silicone oil is 0.6-1wt%.

[0015] In some embodiments, the silane coupling agent includes at least one of triethoxy(1-phenylvinyl)silane, γ-aminopropyltriethoxysilane, γ-(2,3-epoxypropyloxy)propyltrimethoxysilane, and γ-methacryloxypropyltrimethoxysilane.

[0016] In some embodiments, the catalyst comprises a Custer catalyst and / or a Wilkinson catalyst.

[0017] In some embodiments, the inhibitor includes at least one of tetramethyldivinyldisiloxane, tetramethyltetravinylcyclotetrasiloxane, 2-methyl-3-butyn-2-ol, ethynylcyclohexanol, diallyl maleate, and diisooctyl maleate.

[0018] In some embodiments, the ultraviolet light blocking agent includes at least one of a liquid benzotriazole ultraviolet light absorber, a benzophenone ultraviolet light shielding agent, and ethylhexyl methoxycinnamate.

[0019] The second aspect of the present application provides a method for preparing the organic silicone adhesive composition described in the first aspect, comprising the following steps:

[0020] The raw materials of the component A and the component B are respectively mixed to prepare the component A and the component B.

[0021] The third aspect of the present application provides an optically transparent film, the raw materials of which include the organic silicone adhesive composition described in the first aspect.

[0022] The fourth aspect of the present application provides the use of the organic silicone adhesive composition described in the first aspect or the optically transparent film described in the third aspect in a display screen.

[0023] The fifth aspect of the present application provides a display screen, the raw materials of which include the organic silicone adhesive composition described in the first aspect or the optically transparent film described in the third aspect.

[0024] The beneficial effects of this application are:

[0025] The present application uses a UV blocker in an organic silicone adhesive composition, and at the same time adds a cross-linking agent to promote the formation of a cross-linked network in the organic silicone system, effectively enhancing the mechanical strength, environmental corrosion resistance and UV light blocking ability of the product, and reducing the migration and precipitation of the UV blocker, further improving the stability under ultraviolet irradiation, thereby preparing an organic silicone adhesive composition with excellent UV blocking properties, optical properties and mechanical properties, which can be used in display screens to meet their outdoor use needs. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present application, the present application will be described more comprehensively below in conjunction with specific embodiments. Preferred embodiments of the present application are provided hereinafter. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] In this article, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0029] In this article, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0030] In the description herein, "at least one" means more than one, including one or more than two, for example, one, two, three, etc., unless otherwise clearly defined.

[0031] Herein, when it comes to numerical ranges, unless otherwise specified, the numerical ranges are deemed to be continuous and include the minimum and maximum values ​​of the range, as well as every value between such minimum and maximum values. Further, when a range refers to an integer, every integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges included therein.

[0032] In this article, when referring to the unit of a data range, if there is a unit only after the right endpoint, it means that the units of the left and right endpoints are the same. For example, 500-600rpm means that the units of the left endpoint "500" and the right endpoint "600" are both rpm (revolutions per minute).

[0033] The temperature parameters herein, unless otherwise specified, allow for both constant temperature treatment and treatment within a certain temperature range. The constant temperature treatment allows for temperature fluctuations within the precision range of instrument control.

[0034] The viscosity of each raw material herein refers to the viscosity at 25°C.

[0035] In a first aspect of the present application, there is provided an organic silicone adhesive composition, comprising component A and component B;

[0036] The component A comprises the following raw materials: a first vinyl silicone oil, a vinyl silicone resin, a silane coupling agent and a catalyst;

[0037] The component B comprises the following raw materials: a second vinyl silicone oil, a chain extender, a cross-linking agent, an inhibitor and an ultraviolet light blocking agent;

[0038] The chain extender includes terminal hydrogen-containing silicone oil; the cross-linking agent includes terminal side hydrogen-containing silicone oil.

[0039] The present application uses a UV blocker in an organic silicone adhesive composition, and at the same time adds a cross-linking agent to promote the formation of a cross-linked network in the organic silicone system, effectively enhancing the mechanical strength, environmental corrosion resistance and UV light blocking ability of the product, and reducing the migration and precipitation of the UV blocker, further improving the stability under ultraviolet irradiation, thereby preparing an organic silicone adhesive composition with excellent UV blocking properties, optical properties and mechanical properties, which can be used in display screens to meet their outdoor use needs.

[0040] Specifically, the component A comprises the following raw materials in parts by weight: 20-80 parts of a first vinyl silicone oil, 5-30 parts of a vinyl silicone resin, 1-5 parts of a silane coupling agent, and 1-2 parts of a catalyst;

[0041] The component B comprises the following raw materials in parts by weight: 10-40 parts of a second vinyl silicone oil, 10-30 parts of a chain extender, 1-10 parts of a cross-linking agent, 1-2 parts of an inhibitor and 0.5-5 parts of an ultraviolet light blocking agent.

[0042] In the present application, the specific parameters of the vinyl-terminated silicone oil are not particularly limited. Optionally, the vinyl content of the first double-terminated vinyl silicone oil and the second double-terminated vinyl silicone oil is 0.06-0.43wt%, such as 0.06wt%, 0.1wt%, 0.15wt%, 0.2wt%, 0.25wt%, 0.3wt%, 0.35wt%, 0.4wt%, etc.; the corresponding viscosity is 500-100000cp, and the appropriate viscosity can be adjusted by selecting vinyl silicone oils of different molecular weights.

[0043] In the present application, the main function of the vinyl silicone resin is to increase the cohesion of the glue and improve the adhesion, and its specific parameters are not particularly limited. Optionally, the vinyl content of the vinyl silicone resin is 0.9-1.9wt%, such as 0.9wt%, 1wt%, 1.1wt%, 1.2wt%, 1.3wt%, 1.4wt%, 1.5wt%, 1.6wt%, 1.7wt%, 1.8wt%, 1.9wt%, etc.; the corresponding viscosity is 5000-60000cp; the vinyl silicone resin includes MQ vinyl silicone resin and / or MT vinyl silicone resin.

[0044] In the present application, the main function of the terminal hydrogen-containing silicone oil is to expand the molecular weight, increase the molecular weight, and improve the cohesion and toughness of the glue. The specific parameters are not particularly limited. Optionally, the hydrogen content of the terminal hydrogen-containing silicone oil is 0.02-0.5wt%, such as 0.02wt%, 0.05wt%, 0.1wt%, 0.2wt%, 0.3wt%, 0.4wt%, 0.5wt%, etc.

[0045] It is understandable that the end side hydrogenated silicone oil refers to the hydrogenated silicone oil containing terminal silicon hydrogen bonds and side silicon hydrogen bonds. Specifically, the hydrogen content of the end side hydrogenated silicone oil is 0.6-1wt%, such as 0.6wt%, 0.7wt%, 0.8wt%, 0.9wt%, 1wt%, etc. The silicon hydrogen groups in the end side hydrogenated silicone oil can react with the vinyl in the vinyl silicone oil and the vinyl silicone resin, and the presence of the side silicon hydrogen groups can promote the formation of the cross-linked network in the organosilicon system, can effectively enhance the overall mechanical strength and environmental corrosion resistance of the material, and improve the stability under ultraviolet irradiation, improve thermal stability, chemical resistance and ultraviolet resistance. Especially in the system of the present application, the presence of the end side hydrogenated silicone oil can also reduce the migration and precipitation of the ultraviolet blocker, and further improve the stability under ultraviolet irradiation.

[0046] In this application, the main function of the silane coupling agent is to improve adhesion, and the specific type is not particularly limited. Optionally, the silane coupling agent includes at least one of triethoxy (1-phenylvinyl) silane, γ-aminopropyl triethoxy silane (KH550), γ-(2,3-epoxypropoxy) propyl trimethoxy silane (KH560) and γ-methacryloxypropyl trimethoxy silane (KH570). Among them, triethoxy (1-phenylvinyl) silane has a strong absorption capacity for ultraviolet rays due to its phenyl group, can absorb the high-energy part of ultraviolet light, and reduce the degradation effect caused by ultraviolet rays (such as oxidation, chain breaking, etc.), so it can effectively increase the material's anti-ultraviolet performance and delay the aging process; at the same time, the presence of phenyl can also increase the scattering of ultraviolet rays, disperse the energy of ultraviolet light, avoid ultraviolet rays directly acting on the main chain of silicone, and reduce the degradation or damage of the main chain caused by ultraviolet rays, so it is more preferred.

[0047] In the present application, the catalyst is not particularly limited, and optionally, the catalyst includes a Custer catalyst and / or a Wilkinson catalyst, wherein the concentration of the Custer catalyst is 1000-5000 ppm, and the concentration of the Wilkinson catalyst is 0.05-0.5%.

[0048] In the present application, the inhibitor functions to reduce the crosslinking speed, and the specific type is not particularly limited. Optionally, the inhibitor includes at least one of tetramethyldivinyldisiloxane, tetramethyltetravinylcyclotetrasiloxane, 2-methyl-3-butyn-2-ol, ethynylcyclohexanol, diallyl maleate, and diisooctyl maleate.

[0049] In the present application, the function of the ultraviolet light blocking agent is to absorb ultraviolet light, and the specific type is not particularly limited. Optionally, the ultraviolet light blocking agent includes at least one of a liquid benzotriazole ultraviolet light absorber, a benzophenone ultraviolet light shielding agent, and ethylhexyl methoxycinnamate.

[0050] The second aspect of the present application provides a method for preparing the organic silicone adhesive composition described in the first aspect, comprising the following steps:

[0051] The raw materials of the component A and the component B are respectively mixed to prepare the component A and the component B.

[0052] The third aspect of the present application provides an optically transparent film, the raw materials of which include the organic silicone adhesive composition described in the first aspect.

[0053] Specifically, the mass ratio of the component A to the component B is 1:0.5-2.

[0054] The optically transparent film of the present application has excellent ultraviolet blocking performance, optical performance and mechanical properties, and can be used for display screens to meet their outdoor use requirements.

[0055] The fourth aspect of the present application provides the use of the organic silicone adhesive composition described in the first aspect or the optically transparent film described in the third aspect in a display screen.

[0056] The organic silicone adhesive composition or optically transparent film of the present application has excellent ultraviolet blocking performance, optical performance and mechanical properties, and can be used in display screens to meet their outdoor use requirements.

[0057] The fifth aspect of the present application provides a display screen, the raw materials of which include the organic silicone adhesive composition described in the first aspect or the optically transparent film described in the third aspect.

[0058] The display screen of the present application adopts an organic silicone adhesive composition or an optically transparent film with excellent ultraviolet blocking properties, optical properties and mechanical properties, has better visual effects and ultraviolet blocking properties, and can meet the needs of outdoor use.

[0059] It is worth noting that the raw materials used in the examples of the present application are all common commercially available products, and their sources are not specifically limited.

[0060] The following is an exemplary description of some raw materials:

[0061] .

[0062] The following are specific embodiments.

[0063] Example 1

[0064] Component A:

[0065] Vinyl silicone oil: 20 parts with a vinyl content of 0.06wt%, 20 parts with a vinyl content of 0.12wt%, 5 parts with a vinyl content of 0.32wt%;

[0066] Vinyl silicone resin: 10 parts with a vinyl content of 0.96wt%;

[0067] Silane coupling agent (MR040187 and KH570 mass ratio is 1:1) 1 part;

[0068] 1 part of catalyst;

[0069] Component B:

[0070] Vinyl silicone oil: 10 parts with a vinyl content of 0.12wt%, 5 parts with a vinyl content of 0.43wt%;

[0071] Chain extender: 10 parts with a hydrogen content of 0.18wt%, 5 parts with a hydrogen content of 0.045wt%;

[0072] Cross-linking agent: 2 parts with a hydrogen content of 0.8wt%;

[0073] 1 part of inhibitor;

[0074] 0.5 parts of UV blocker.

[0075] Example 2

[0076] Component A:

[0077] Vinyl silicone oil: 30 parts with a vinyl content of 0.06wt%, 10 parts with a vinyl content of 0.12wt%, and 10 parts with a vinyl content of 0.32wt%;

[0078] Vinyl silicone resin: 8 parts with a vinyl content of 0.96wt%;

[0079] Silane coupling agent (MR040187 and KH570 mass ratio is 1:1) 1 part;

[0080] 1 part of catalyst;

[0081] Component B:

[0082] Vinyl silicone oil: 10 parts with a vinyl content of 0.12wt%, 5 parts with a vinyl content of 0.43wt%;

[0083] Chain extender: 10 parts with a hydrogen content of 0.18wt%, 5 parts with a hydrogen content of 0.045wt%;

[0084] Cross-linking agent: 2 parts with a hydrogen content of 0.8wt%;

[0085] 1 part of inhibitor;

[0086] 1 part of UV blocker.

[0087] Example 3

[0088] Component A:

[0089] Vinyl silicone oil: 25 parts with a vinyl content of 0.06wt%, 10 parts with a vinyl content of 0.12wt%, and 10 parts with a vinyl content of 0.43wt%;

[0090] Vinyl silicone resin: 12 parts with a vinyl content of 0.96wt%;

[0091] Silane coupling agent (MR040187 and KH570 mass ratio is 1:1) 1 part;

[0092] 1 part of catalyst;

[0093] Component B:

[0094] Vinyl silicone oil:

[0095] 10 parts with a vinyl content of 0.12 wt%, 5 parts with a vinyl content of 0.43 wt%;

[0096] Chain extender: 10 parts with a hydrogen content of 0.18wt%, 5 parts with a hydrogen content of 0.045wt%;

[0097] Cross-linking agent: 2 parts with a hydrogen content of 0.8wt%;

[0098] 1 part of inhibitor;

[0099] 1 part of UV blocker.

[0100] Example 4

[0101] Component A:

[0102] Vinyl silicone oil: 30 parts with a vinyl content of 0.06wt%, 20 parts with a vinyl content of 0.12wt%, 5 parts with a vinyl content of 0.32wt%;

[0103] Vinyl silicone resin: 12 parts with a vinyl content of 0.96wt%;

[0104] Silane coupling agent (MR040187 and KH570 mass ratio is 1:1) 1 part;

[0105] 1 part of catalyst;

[0106] Component B:

[0107] Vinyl silicone oil: 10 parts with a vinyl content of 0.12wt%, 5 parts with a vinyl content of 0.43wt%;

[0108] Chain extender, 10 parts with a hydrogen content of 0.18 wt%, 5 parts with a hydrogen content of 0.045 wt%;

[0109] Cross-linking agent: 2 parts with a hydrogen content of 0.8wt%;

[0110] 1 part of inhibitor;

[0111] 2 parts of UV blocker.

[0112] Example 5

[0113] Component A:

[0114] Vinyl silicone oil: 30 parts with a vinyl content of 0.06wt%, 20 parts with a vinyl content of 0.12wt%, 5 parts with a vinyl content of 0.32wt%;

[0115] Vinyl silicone resin: 12 parts with a vinyl content of 0.96wt%;

[0116] Silane coupling agent (MR040187 and KH570 mass ratio is 1:1) 1 part;

[0117] 1 part of catalyst;

[0118] Component B:

[0119] Vinyl silicone oil: 10 parts with a vinyl content of 0.12wt%, 5 parts with a vinyl content of 0.43wt%;

[0120] Chain extender, 10 parts with a hydrogen content of 0.18 wt%, 5 parts with a hydrogen content of 0.045 wt%;

[0121] Cross-linking agent: 2 parts with a hydrogen content of 0.8wt%;

[0122] 1 part of inhibitor;

[0123] 4 parts of UV blocker.

[0124] Comparative Example 1

[0125] Except that no ultraviolet light blocking agent is added, the rest is the same as Example 5.

[0126] Comparative Example 2

[0127] Except that no cross-linking agent is added, the rest is the same as Example 5.

[0128] The preparation methods of the organic silicone adhesive composition and the optically transparent film of the embodiment and the comparative example are as follows:

[0129] 1) Glue preparation:

[0130] Mix the raw materials except the catalyst in component A, stir at 2000 rpm for 2 minutes using a vacuum degassing stirring device, add the catalyst after cooling, and stir at 1500 rpm for 1 minute using a vacuum degassing stirring device to obtain component A;

[0131] Mix the raw materials except the inhibitor in component B, stir at 2000 rpm for 2 minutes using a vacuum degassing stirring device, add the inhibitor after cooling, and then stir at 1500 rpm using a vacuum degassing stirring device for 1 minute to obtain component B;

[0132] 2) Mixing: Mix component A and component B in a ratio of 1:1, and stir at 1500 rpm for 2 minutes using a vacuum degassing stirring device to obtain a glue mixture;

[0133] 3) Curing and coating: Pour the obtained glue mixture onto a release film that can be released, pad the two ends of the release film with pads of the thickness of the glue to be coated, use a scraper to flatten it, place it on a glass plate, put it in an oven at 85°C for curing, and bake for 15 minutes; take it out after baking, cool it down, and cover the surface with the release film to obtain an optically transparent film that can block ultraviolet rays.

[0134] Test Case

[0135] The performance of the optically transparent films of the embodiments and comparative examples was characterized, and the performance before and after the QUV test was tested respectively. The specific QUV test conditions were: two stages: the first stage lasted for 8 hours: heating temperature 42°C, light 0.68w / m²; the second stage lasted for 4 hours: condensation temperature 50°C; the two stages were cycled to 1000 hours. The results are shown in Table 1-2. The specific test standards are as follows:

[0136] Transmittance: Test standard is JIS K7105-81;

[0137] Volume shrinkage: Test standard is ASTM C1241-14;

[0138] Haze: Test standard is JIS K 7136;

[0139] Tensile strength: Test standard is JIS K 6815-1;

[0140] Table 1 Summary of performance of examples and comparative examples

[0141]

[0142] Peel strength: test standard is GB / T 2792-2014;

[0143] Ultraviolet light absorption rate: The standard is GB / T 25274-2010.

[0144] It can be seen from Table 1 that Examples 1-5 all have good UV light blocking performance, and have excellent optical properties, adhesive properties and elongation at break.

[0145] In contrast, in Example 1, no UV blocking agent was added, and not only the UV blocking performance was significantly deteriorated, but also the optical properties, bonding strength and elongation at break also decreased to a certain extent, especially after aging, the deterioration was more obvious.

[0146] Comparative Example 2 does not add a crosslinking agent, and even if a UV blocker is added, ideal UV blocking performance, optical performance, bonding performance and elongation at break cannot be obtained. It can be seen that the present application uses a UV blocker in the organic silicone adhesive composition, and at the same time adds a crosslinking agent to promote the formation of a crosslinked network in the organic silicone system, so that an optically transparent film with excellent UV blocking performance, optical performance and mechanical properties can be prepared.

[0147] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0148] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. An organic silicone adhesive composition, characterized in that: Comprising component A and component B; The component A comprises the following raw materials: a first vinyl silicone oil, a vinyl silicone resin, a silane coupling agent and a catalyst; The component B comprises the following raw materials: a second vinyl silicone oil, a chain extender, a cross-linking agent, an inhibitor and an ultraviolet light blocking agent; The chain extender includes terminal hydrogen-containing silicone oil; the cross-linking agent includes terminal side hydrogen-containing silicone oil.

2. The organic silicone adhesive composition according to claim 1, characterized in that: The component A comprises the following raw materials in parts by weight: 20-80 parts of the first vinyl silicone oil, 5-30 parts of the vinyl silicone resin, 1-5 parts of the silane coupling agent and 1-2 parts of the catalyst; The component B comprises the following raw materials in parts by weight: 10-40 parts of a second vinyl silicone oil, 10-30 parts of a chain extender, 1-10 parts of a cross-linking agent, 1-2 parts of an inhibitor and 0.5-5 parts of an ultraviolet light blocking agent.

3. The organic silicone adhesive composition according to claim 1 or 2, characterized in that: The vinyl content of the first vinyl silicone oil and the second vinyl silicone oil is independently 0.06-0.43wt%; and / or the vinyl content of the vinyl silicone resin is 0.9-1.9wt%; and / or the hydrogen content of the hydrogen-terminated silicone oil is 0.02-0.5wt%; And / or the hydrogen content of the end side hydrogen-containing silicone oil is 0.6-1wt%.

4. The organic silicone adhesive composition according to claim 1 or 2, characterized in that: The silane coupling agent includes at least one of triethoxy(1-phenylvinyl)silane, γ-aminopropyltriethoxysilane, γ-(2,3-epoxypropyloxy)propyltrimethoxysilane and γ-methacryloxypropyltrimethoxysilane.

5. The organic silicone adhesive composition according to claim 1 or 2, characterized in that: The catalyst comprises a Custer catalyst and / or a Wilkinson catalyst; And / or, the inhibitor includes at least one of tetramethyldivinyldisiloxane, tetramethyltetravinylcyclotetrasiloxane, 2-methyl-3-butyn-2-ol, ethynylcyclohexanol, diallyl maleate, and diisooctyl maleate.

6. The organic silicone adhesive composition according to claim 1 or 2, characterized in that: The ultraviolet light blocking agent includes at least one of a liquid benzotriazole ultraviolet light absorber, a benzophenone ultraviolet light shielding agent and ethylhexyl methoxycinnamate.

7. The method for preparing the organic silicone adhesive composition according to any one of claims 1 to 6, characterized in that: The steps include: The raw materials of the component A and the component B are respectively mixed to prepare the component A and the component B.

8. An optically transparent film, characterized in that: The raw materials include the organic silicone adhesive composition as described in any one of claims 1 to 6.

9. Use of the organic silicone adhesive composition according to any one of claims 1 to 6 or the optically transparent film according to claim 8 in a display screen.

10. A display screen, characterized in that: The raw materials include the organic silicone adhesive composition described in any one of claims 1 to 6 or the optically transparent film described in claim 8.

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