High-refractive and aging-resistant silicone OCA optical adhesive, preparation method and application thereof

Abstract

The application discloses a high-refractive and aging-resistant organic silicon OCA optical adhesive as well as a preparation method and application thereof. The OCA optical adhesive comprises the following raw materials: methyl vinyl polysiloxane, methyl MQ resin, methyl phenyl MQ resin, phenyl vinyl Q type silicone oil, hydrogen-containing silicone oil, platinum gold catalyst, inhibitor and diluent. The application successfully prepares a single-system organic silicon OCA optical adhesive with high refractive index, good weather resistance and high peeling strength by introducing the MQ resin and the phenyl vinyl Q type silicone oil and adjusting the ratio of the MQ resin and the methyl vinyl polysiloxane.

Description

Technical Field

[0001] This invention relates to an organosilicon OCA optical adhesive, and more particularly to an organosilicon OCA optical adhesive with high refractive index and aging resistance, its preparation method, and its application. Background Technology

[0002] With the continuous upgrading of touch screen electronic products, the area of ​​automotive screens, industrial screens and commercial display screens is getting larger and larger, and the demand for OCA optical adhesives used in such products is getting higher and higher. Although the acrylic optical adhesives currently widely used have good optical properties, their weather resistance and compatibility with substrates are poor. In certain specific scenarios, they cannot meet the performance requirements. Therefore, high-performance silicone OCA optical adhesives are needed.

[0003] Compared to acrylic OCA optical adhesives, silicone OCA optical adhesives possess better flexibility and stress absorption capabilities due to the higher bond energy and larger bond angle of the Si-O bonds, resulting in a more flexible Si-O-Si backbone and reducing the likelihood of mura during use. However, silicone materials have a lower refractive index, which degrades the display quality of the screen, thus limiting the widespread application of silicone OCA optical adhesives. Furthermore, while silicone materials offer some weather resistance, the increasingly complex operating environments for OCA adhesives mean that silicone OCA optical adhesives still face challenges regarding their lifespan.

[0004] Chinese patent CN 115521758A discloses a method for preparing a high refractive index organosilicon OCA. By introducing phenyl vinyl silicone resin, the refractive index of the organosilicon OCA is effectively improved. However, the organosilicon OCA prepared by this patent has poor peel strength and poor aging performance.

[0005] Chinese patent CN 117820976A discloses an OCA adhesive film for bonding automotive displays and its preparation method. By blending an organosilicon system with an acrylic system, the shortcomings of poor weather resistance of acrylic products and low refractive index of organosilicon products are compensated. However, the compatibility of the two systems cannot be guaranteed, and there is a certain risk to the service life.

[0006] In light of the above issues, it is necessary to develop an organosilicon OCA optical adhesive with high refractive index, good weather resistance, and good peel strength. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention proposes a high-refractive-index and aging-resistant organosilicon OCA optical adhesive, its preparation method, and its applications. This invention successfully prepares a single-system organosilicon OCA optical adhesive with high refractive index, good weather resistance, and high peel strength by introducing MQ resin and phenyl vinyl Q-type silicone oil, and adjusting the ratio of MQ resin to methyl vinyl polysiloxane.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] A high refractive index and aging-resistant silicone OCA optical adhesive, comprising the following raw materials in parts by weight:

[0010] 5-20 parts of methyl vinyl polysiloxane, preferably 10-16 parts, for example 10, 12, 14, or 16 parts.

[0011] The methyl MQ resin is 15-40 parts, preferably 20-32 parts, for example 20, 24, 28, or 32 parts.

[0012] 2-10 parts of methylphenyl MQ resin, preferably 4-8 parts, for example 4, 6, or 8 parts.

[0013] 1-8 parts of phenyl vinyl type Q silicone oil, preferably 2-6 parts, for example 2, 4, or 6 parts.

[0014] The amount of hydrogen-containing silicone oil is 0.1-1.5 parts, preferably 0.2-0.8 parts, for example, 0.2, 0.4, 0.6, or 0.8 parts.

[0015] The platinum catalyst is 0.1-1 part, preferably 0.2-0.6 parts, for example 0.2, 0.4, or 0.6 parts.

[0016] The inhibitor is administered at a dosage of 0.1-1 part, preferably 0.1-0.6 parts, such as 0.1, 0.2, 0.4, or 0.6 parts.

[0017] The diluent is 10-30 parts, preferably 16-24 parts, for example 16, 20, or 24 parts.

[0018] In some preferred examples, the vinyl content of the methyl vinyl polysiloxane is 0.08-0.24 wt%, for example 0.08 wt%, 0.12 wt%, 0.16 wt%, 0.20 wt%, 0.24 wt%, preferably 0.08-0.12 wt%.

[0019] Preferably, the weight-average molecular weight of the methyl vinyl polysiloxane is 500,000 to 800,000, for example, 500,000, 600,000, 700,000, or 800,000, with 600,000 to 700,000 being the most preferred.

[0020] In some preferred examples, the M / Q value of the methyl MQ resin is 0.6-0.9, for example 0.6, 0.7, 0.8, 0.9;

[0021] Preferably, the molar mass of the methyl MQ resin is 3500-6500 g / mol, for example 3500 g / mol, 4500 g / mol, 5500 g / mol, or 6500 g / mol;

[0022] Preferably, the hydroxyl content of the methyl MQ resin is ≤0.5 wt%.

[0023] In some preferred examples, the phenyl content of the methylphenyl MQ resin is 15-45 wt%, for example 15 wt%, 25 wt%, 35 wt%, 45 wt%.

[0024] Preferably, the M / Q value of the methylphenyl MQ resin is 0.7-1.0, for example 0.7, 0.8, 0.9, 1.0.

[0025] In some preferred examples, the phenyl vinyl Q-type silicone oil has a phenyl content of 5-30 wt%, such as 5 wt%, 15 wt%, 20 wt%, 30 wt%, etc.;

[0026] Preferably, the vinyl content of the phenyl vinyl Q-type silicone oil is 2-10 wt%, for example, 2, 5, 8, 10 wt%.

[0027] Preferably, the viscosity of the phenyl vinyl Q-type silicone oil is 600-1800 mPa·s, for example 600 mPa·s, 1000 mPa·s, 1200 mPa·s, or 1750 mPa·s.

[0028] In some preferred examples, the total hydrogen content of the hydrogen-containing silicone oil is 0.8-1.7 wt%, for example, 0.8 wt%, 1.2 wt%, 1.5 wt%, and 1.7 wt%; the hydrogen-containing silicone oil contains both terminal hydrogen groups and side hydrogen groups.

[0029] Preferably, the viscosity of the hydrogen-containing silicone oil is 30-100 mPa·s, for example 30 mPa·s, 50 mPa·s, 75 mPa·s, or 100 mPa·s.

[0030] In some preferred examples, the platinum catalyst is at least one of tetraethyldiethylenedisilane chloroplatinate complex, cyclopentadienyl platinum catalyst, cyclooctadienyl platinum catalyst, and acetylacetone platinum catalyst.

[0031] Preferably, the mass concentration of platinum in the platinum catalyst is 3000-5000 ppm.

[0032] In some preferred examples, the inhibitor is an alkynyl alcohol inhibitor, preferably at least one of ethynylcyclohexanol, dimethylhexynol, methylbutynol, and methylethynol;

[0033] Preferably, the diluent is at least one selected from benzene solvents, ester solvents, and alkane solvents, and more preferably at least one selected from toluene, ethyl acetate, n-heptane, and toluene.

[0034] This invention also provides a method for preparing a high refractive index and aging-resistant organosilicon OCA optical adhesive as described above, comprising the following steps:

[0035] 1) Mix methyl vinyl polysiloxane, methyl MQ resin, methyl phenyl MQ resin, phenyl vinyl Q type silicone oil, hydrogen-containing silicone oil, inhibitor, and diluent according to the weight parts, and stir evenly;

[0036] 2) Add the platinum catalyst to the premix, stir again until homogeneous, filter and degas to obtain the pre-coated slurry;

[0037] 3) Apply the pre-coated slurry to the base film using a doctor blade, followed by heat curing to obtain the silicone OCA optical adhesive.

[0038] In step 1), the ambient temperature during stirring is 25-35℃, the stirring speed is 400-1000rpm, and the stirring time is 4-6h.

[0039] Preferably, in step 2), the ambient temperature during stirring is 25-35℃, the stirring speed is 400-1000 rpm, and the stirring time is 15-30 min.

[0040] Preferably, the platinum catalyst is added slowly in step 2), with an addition time of 2-5 minutes;

[0041] Preferably, the filtration in step 2) involves filtering the slurry using a 400-mesh stainless steel filter screen;

[0042] Preferably, the degassing in step 2) is carried out in a high-speed degassing machine at a degassing speed of 2000-4000 r / min;

[0043] Preferably, the base film in step 3) is a fluoroplastic film, and the release force of the base film is 3-5 g / inch;

[0044] Preferably, the heat curing time in step 3) is 1.5-3 min and the curing temperature is 135-165℃.

[0045] Preferably, after heat curing in step 3), a fluoroplastic film with a relatively light release force (1-3 g / inch) is applied to the surface of the silicone OCA optical adhesive to obtain an optical tape.

[0046] The present invention also provides an application of the high refractive index and aging resistant organosilicon OCA optical adhesive as described above in the field of screen display, especially in mobile phone screens and automotive screens.

[0047] The silicone OCA optical adhesive described in this invention has the following advantages compared to existing silicone OCA optical adhesives:

[0048] 1. The silicone OCA optical adhesive described in this invention has a higher refractive index, which gives it better display performance;

[0049] 2. By introducing phenyl vinyl Q-type silicone oil, this invention increases the overall crosslinking density of the organosilicon OCA optical adhesive, thereby improving the weather resistance, anti-aging properties, and yellowing resistance of the OCA adhesive, enabling the organosilicon OCA optical adhesive to be used normally in more demanding environments.

[0050] 3. By adding MQ resin and adjusting its ratio with vinyl raw rubber, the present invention enables the optical adhesive to maintain a high peel strength even with a high crosslinking density, reaching the level of the current market-available silicone OCA optical adhesive, but with better display performance and weather resistance. Detailed Implementation

[0051] The present invention will be further illustrated below with specific embodiments. These embodiments are merely illustrative and do not limit the scope of the invention.

[0052] The main raw materials used in the embodiments and comparative examples of this invention are as follows. Unless otherwise specified, other raw materials and reagents were obtained through commercial channels or through in-house synthesis:

[0053] Methyl vinyl polysiloxane-1, weight average molecular weight 500,000, vinyl content 0.24 wt%, Hoshine Silicon Industry Co., Ltd.

[0054] Methyl vinyl polysiloxane-2, weight average molecular weight 600,000, vinyl content 0.16 wt%, Hoshine Silicon Industry Co., Ltd.

[0055] Methyl vinyl polysiloxane-3, weight average molecular weight 700,000, vinyl content 0.12 wt%, Hoshine Silicon Industry Co., Ltd.

[0056] Methyl vinyl polysiloxane-4, weight average molecular weight 800,000, vinyl content 0.08 wt%, Hoshine Silicon Industry Co., Ltd.

[0057] Methyl MQ resin-1, M / Q value 0.6, molar mass 3500 g / mol, hydroxyl content ≤0.5 wt%, product structural formula is (R3SiO 1 / 2 ) 21(SiO 4 / 2 ) 30 R represents hydroxyl or methyl; Hubei Longsheng Sihai;

[0058] Methyl MQ resin-2, M / Q value 0.7, molar mass 4500 g / mol, hydroxyl content ≤0.5 wt%, product structural formula is (R3SiO 1 / 2 ) 26 (SiO 4 / 2 ) 37 R represents hydroxyl or methyl; Hubei Longsheng Sihai;

[0059] Methyl MQ resin-3, M / Q value 0.8, molar mass 5500 g / mol, hydroxyl content ≤0.5 wt%, product structural formula is (R3SiO 1 / 2 ) 32 (SiO 4 / 2 ) 41 R represents hydroxyl or methyl; Hubei Longsheng Sihai;

[0060] Methyl MQ resin-4, M / Q value 0.9, molar mass 6500 g / mol, hydroxyl content ≤0.5 wt%, product structural formula is (R3SiO 1 / 2 ) 36 (SiO 4 / 2 ) 45 R represents hydroxyl or methyl; Hubei Longsheng Sihai;

[0061] Methylphenyl MQ resin-1, M / Q value 0.7, phenyl content 15wt%, product structural formula is (R3SiO 1 / 2 ) 21 (SiO 4 / 2 ) 30 R is phenyl or methyl, prepared according to Example 3 of patent CN104140535B;

[0062] Methylphenyl MQ resin-2, M / Q value 0.8, phenyl content 25wt%, product structural formula is (R3SiO 1 / 2 ) 26 (SiO 4 / 2 ) 32 R is phenyl or methyl, prepared according to Example 1 of patent CN104140535B;

[0063] Methylphenyl MQ resin-3, M / Q value 0.9, phenyl content 35wt%, product structural formula is (R3SiO 1 / 2 ) 30 (SiO 4 / 2 ) 35 R is phenyl or methyl, prepared according to Example 4 of patent CN104140535B;

[0064] Methylphenyl MQ resin-4, M / Q value 1.0, phenyl content 45wt%, product structural formula is (R3SiO 1 / 2 ) 34 (SiO 4 / 2 ) 37 R is phenyl or methyl, prepared according to Example 2 of patent CN104140535B;

[0065] Phenylvinyl Q-type silicone oil-1, with a viscosity of 620 mPa·s, vinyl content of 10 wt%, and phenyl content of 5 wt%, was prepared with reference to Comparative Example 2 of patent CN113321810A;

[0066] Phenylvinyl Q-type silicone oil-2: viscosity of 1000 mPa·s, vinyl content of 8 wt%, phenyl content of 10 wt%, prepared according to Example 6 of patent CN113321810A;

[0067] Phenylvinyl Q-type silicone oil-3: viscosity of 1200 mPa·s, vinyl content of 5 wt%, phenyl content of 20 wt%, prepared according to Example 4 of patent CN113321810A;

[0068] Phenylvinyl Q-type silicone oil-4: viscosity of 1750 mPa·s, vinyl content of 2 wt%, phenyl content of 30 wt%, prepared according to Example 7 of patent CN113321810A;

[0069] Hydrogen-containing silicone oil-1, viscosity 30 mPa·s, total hydrogen content 1.7 wt%, Runhe Organosilicon New Materials Co., Ltd.

[0070] Hydrogen-containing silicone oil-2, viscosity 50 mPa·s, total hydrogen content 1.4 wt%, Runhe Organosilicon New Materials Co., Ltd.

[0071] Hydrogen-containing silicone oil-3, viscosity 80 mPa·s, total hydrogen content 1.2 wt%, Runhe Organosilicon New Materials Co., Ltd.

[0072] Hydrogen-containing silicone oil-4, viscosity 100 mPa·s, total hydrogen content 1.7 wt%, Runhe Organosilicon New Materials Co., Ltd.

[0073] Platinum catalyst, trimethylcyclopentadienylplatinum, platinum metal concentration of 5000ppm, Wuhan Beileye Co., Ltd.;

[0074] (1,5-Cyclooctadiene)dimethylplatinum, platinum concentration 5000 ppm, Sigma, USA;

[0075] Platinum acetylacetonate, with a platinum concentration of 5000 ppm, Shanghai Fuli Hydrogen Company

[0076] Tetraethyldiethylenedisilane chloroplatinate complex, with a platinum concentration of 5000 ppm, Wanhua Chemical;

[0077] Inhibitors: etynylcyclohexanol, dimethylhexynol, methylbutynol, methylethynol; Wanhua Chemical.

[0078] Diluents: xylene, Inokai;

[0079] High-release-force fluoroplastic film, model 5061, release force 6g / inch, original color;

[0080] Light-release fluoroplastic film, model X18, release force 2g / inch, Heryu.

[0081]

Example 1

[0082] Prepare silicone OCA optical adhesive according to the following formula and method:

[0083] 1) Take 10g of methylvinylsiloxane-1, 20g of methylMQ resin-1, 4g of methylphenylMQ resin-1, 4g of phenylvinyl Q-type silicone oil-1, 0.6g of hydrogen-containing silicone oil-1, 0.4g of dimethylhexynol, and 16g of ethyl acetate and put them into a disperser. Turn on the disperser, turn the speed at 500 rpm, and stir for 4 hours to ensure that the components are fully dispersed.

[0084] 2) Add 0.4g of trimethylcyclopentadienylplatinum to the disperser, turn on the stirrer again, the speed is 500rpm, the stirring time is 15min. After stirring, filter the slurry with a 400-mesh stainless steel filter screen, and place the filtered slurry in a high-speed degassing machine for degassing at a speed of 3000r / min. Then the pre-coated slurry is obtained.

[0085] 3) Apply the pre-coated slurry onto the heavy-duty fluoroplastic film using a stainless steel scraper, followed by heat curing at 130°C for 3 minutes to obtain the silicone OCA optical adhesive.

[0086] 4) Cover the optical adhesive surface obtained in step 3) with a light release fluoroplastic film to obtain an organosilicon OCA optical tape.

[0087]

Example 2

[0088] Prepare silicone OCA optical adhesive according to the following formula and method:

[0089] 1) Take 12g of methylvinylsiloxane-2, 24g of methylMQ resin-2, 6g of methylphenylMQ resin-2, 2g of phenylvinyl Q-type silicone oil-2, 0.2g of hydrogen-containing silicone oil-2, 0.1g of methylbutyninol, and 20g of ethyl acetate and put them into a disperser. Turn on the disperser, turn the speed at 700 rpm, and stir for 5 hours to ensure that the components are fully dispersed.

[0090] 2) Add 0.2g of (1,5-cyclooctadiene)dimethylplatinum to the disperser, start stirring again at 700rpm for 20min. After stirring, filter the slurry with a 400-mesh stainless steel filter and place the filtered slurry in a high-speed degassing machine for degassing at 3500r / min to obtain the pre-coated slurry.

[0091] 3) Apply the pre-coated slurry onto the heavy-duty fluoroplastic film using a stainless steel scraper, followed by heat curing at 140°C for 2 minutes to obtain the silicone OCA optical adhesive.

[0092] 4) Cover the optical adhesive surface obtained in step 3) with a light release fluoroplastic film to obtain an organosilicon OCA optical tape.

[0093]

Example 3

[0094] Prepare silicone OCA optical adhesive according to the following formula and method:

[0095] 1) Take 14g of methylvinylsiloxane-3, 28g of methylMQ resin-3, 6g of methylphenylMQ resin-3, 3g of phenylvinyl Q-type silicone oil-3, 0.4g of hydrogen-containing silicone oil-3, 0.2g of methylethynol, and 20g of n-heptane, and put them into a disperser. Turn on the disperser, turn on the speed at 1000 rpm, and stir for 4 hours to ensure that the components are fully dispersed.

[0096] 2) Add 0.3g of acetylacetone platinum to the disperser, turn on the stirrer again, the speed is 800rpm, the stirring time is 20min. After stirring, filter the slurry with a 400-mesh stainless steel filter screen, and put the filtered slurry into a high-speed degassing machine for degassing at a speed of 2500r / min. Then the pre-coated slurry is obtained.

[0097] 3) Apply the pre-coated slurry onto the heavy-duty fluoroplastic film using a stainless steel scraper, followed by heat curing at 150°C for 1.5 minutes to obtain the silicone OCA optical adhesive.

[0098] 4) Cover the optical adhesive surface obtained in step 3) with a light release fluoroplastic film to obtain an organosilicon OCA optical tape.

[0099]

Example 4

[0100] Prepare silicone OCA optical adhesive according to the following formula and method:

[0101] 1) Take 16g of methylvinylsiloxane-4, 32g of methyl MQ resin-4, 8g of methyl phenyl MQ resin-4, 6g of phenyl vinyl Q-type silicone oil-4, 0.8g of hydrogen-containing silicone oil-4, 0.6g of ethynylcyclohexanol, and 24g of xylene, and put them into a disperser. Turn on the disperser, turn the speed at 700 rpm, and stir for 6 hours to ensure that the components are fully dispersed.

[0102] 2) Add 0.6g of tetraethyldiethylenedisilane chloroplatinate complex to the disperser, start stirring again at 700rpm for 30min. After stirring, filter the slurry with a 400-mesh stainless steel filter and place the filtered slurry in a high-speed degassing machine for degassing at a speed of 4000r / min to obtain the pre-coated slurry.

[0103] 3) Apply the pre-coated slurry onto the heavy-duty fluoroplastic film using a stainless steel scraper, followed by heat curing at 165°C for 2 minutes to obtain the silicone OCA optical adhesive.

[0104] 4) Cover the optical adhesive surface obtained in step 3) with a light release fluoroplastic film to obtain an organosilicon OCA optical tape.

[0105] Comparative Example 1

[0106] Organosilicon OCA optical adhesive was prepared using a formulation and method essentially the same as in Example 4, except that the phenyl vinyl Q-type silicone oil-4 in the formulation raw materials was replaced with an equal mass of methyl phenyl vinyl silicone oil (viscosity 1500 mPa·s, vinyl content 1.1 wt%, phenyl content 20 wt%, Wuhan Kemic Co., Ltd.).

[0107] Comparative Example 2

[0108] Organosilicon OCA optical adhesive was prepared using a formula and method that were essentially the same as in Example 4, except that the 32g of methyl MQ resin-4 and 8g of methyl phenyl MQ resin-4 in the formula were replaced with only 15g of methyl MQ resin-4.

[0109] Comparative Example 3

[0110] Organosilicon OCA optical adhesive was prepared using a formula and method that were essentially the same as in Example 4, except that the 32g of methyl MQ resin-4 and 8g of methyl phenyl MQ resin-4 in the formula were replaced with 41g of methyl MQ resin-4 and 8g of methyl phenyl MQ resin-4.

[0111] The organosilicon OCA optical adhesives prepared using Examples 1-4 and Comparative Examples 1-3 were tested for light transmittance, haze, bond strength, aging resistance, damp heat resistance, and yellowing resistance. The test methods are as follows:

[0112] (1) Transmittance and haze: Cut a 1mm thick transparent glass into two pieces, clean them, and use a Kejian transmittance / haze tester to test the transmittance and haze of the blank transparent glass. The test data is used as the test value of the blank sample. Then, use OCA optical tape to stick the two pieces of transparent glass together and perform high-pressure degassing for 10 minutes at a temperature of 30℃ and a pressure of 3kgf to obtain the test sample. Then test the transmittance and haze of the test sample, and subtract the value of the blank sample to obtain the value of the sample.

[0113] (2) Refractive index: Measured according to national standard GB / T 6448—2008;

[0114] (3) Adhesive strength: According to GB / T 2792-1998 on the specific method for determining the 180° peel strength of pressure-sensitive tape, each OCA optical adhesive sample was cut into 25mm×150mm pieces and continuously peeled at a testing machine speed of 300mm / min for testing.

[0115] (4) Aging test: The OCA optical adhesive was placed at a temperature of 85°C and a humidity of 85% for 3000 hours to test its optical properties, bonding strength and resistance to yellowing.

[0116] The performance test data of the organosilicon OCA pressure-sensitive adhesives prepared in the above embodiments and comparative examples are shown in Table 1 below:

[0117] Table 1. Performance Test Results

[0118]

[0119] According to the performance test results, the organosilicon OCA optical adhesive prepared by this invention has a higher refractive index than that of normal organosilicon OCA adhesive, resulting in a better display effect after being bonded to glass. In addition, it also has excellent aging resistance. It can still maintain its appearance characteristics after being treated in a high temperature and high humidity environment for 3000 hours, without bubbles, whitening or yellowing. Moreover, its optical performance and peel strength remain at a relatively good level after aging, making it suitable for a variety of application scenarios.

[0120] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and additions without departing from the method of the present invention, and these improvements and additions should also be considered within the scope of protection of the present invention.

Claims

1. A high refractive index and aging-resistant organosilicon OCA optical adhesive, characterized in that, Including the following parts by weight of raw materials: 5-20 parts of methyl vinyl polysiloxane 15-40 parts of methyl MQ resin 2-10 parts of methyl phenyl MQ resin 1-8 parts of phenyl vinyl type Q silicone oil Hydrogen-containing silicone oil, 0.1-1.5 parts. Platinum catalyst 0.1-1 part, Inhibitor 0.1-1 part, 10-30 parts of diluent.

2. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to claim 1, characterized in that, Including the following parts by weight of raw materials: 10-16 parts of methyl vinyl polysiloxane 20-32 parts of methyl MQ resin, 4-8 parts of methyl phenyl MQ resin, 2-6 parts of phenyl vinyl type Q silicone oil Hydrogen-containing silicone oil, 0.2-0.8 parts. Platinum catalyst 0.2-0.6 parts, Inhibitor 0.1-0.6 parts, Diluent 16-24 parts.

3. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to claim 1, characterized in that, The vinyl content of the methyl vinyl polysiloxane is 0.08-0.24 wt%.

4. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to claim 3, characterized in that, The vinyl content of the methyl vinyl polysiloxane is 0.08-0.12 wt%.

5. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to claim 3, characterized in that, The weight-average molecular weight of the methyl vinyl polysiloxane is 500,000 to 800,000.

6. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to claim 5, characterized in that, The weight-average molecular weight of the methyl vinyl polysiloxane is 600,000 to 700,000.

7. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to claim 1, characterized in that, The M / Q value of the methyl MQ resin is 0.6-0.

9.

8. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to claim 7, characterized in that, The molar mass of the methyl MQ resin is 3500-6500 g / mol.

9. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to claim 7, characterized in that, The hydroxyl content of the methyl MQ resin is ≤0.5wt%.

10. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to any one of claims 1-9, characterized in that, The phenyl content of the methylphenyl MQ resin is 15-45 wt%.

11. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to claim 10, characterized in that, The M / Q value of the methylphenyl MQ resin is 0.7-1.

0.

12. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to any one of claims 1-9, characterized in that, The phenyl content of the phenyl vinyl Q-type silicone oil is 5-30 wt%.

13. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to claim 12, characterized in that, The vinyl content of the phenyl vinyl Q-type silicone oil is 2-10 wt%.

14. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to claim 12, characterized in that, The viscosity of the phenyl vinyl Q-type silicone oil is 600-1800 mPa·s.

15. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to any one of claims 1-9, characterized in that, The total hydrogen content of the hydrogen-containing silicone oil is 0.8-1.7 wt%, and the hydrogen-containing silicone oil contains both terminal hydrogen groups and side hydrogen groups.

16. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to claim 15, characterized in that, The viscosity of the hydrogen-containing silicone oil is 30-100 mPa·s.

17. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to any one of claims 1-9, characterized in that, The platinum catalyst is at least one of tetraethyldiethylenedisilane chloroplatinate complex, cyclopentadienyl platinum catalyst, cyclooctadienyl platinum catalyst, and acetylacetone platinum catalyst.

18. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to claim 17, characterized in that, The platinum catalyst has a platinum metal concentration of 3000-5000 ppm.

19. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to any one of claims 1-9, characterized in that, The inhibitor is an alkynyl alcohol inhibitor.

20. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to claim 19, characterized in that, The inhibitor is at least one of ethynylcyclohexanol, dimethylhexynol, methylbutynol, and methylethynol.

21. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to claim 19, characterized in that, The diluent is at least one selected from benzene solvents, ester solvents, and alkane solvents.

22. The high refractive index and aging-resistant organosilicon OCA optical adhesive according to claim 21, characterized in that, The diluent is at least one of toluene, ethyl acetate, n-heptane, and toluene.

23. A method for preparing a high refractive index and aging-resistant organosilicon OCA optical adhesive as described in any one of claims 1-22, characterized in that, The steps include the following: 1) Mix methyl vinyl polysiloxane, methyl MQ resin, methyl phenyl MQ resin, phenyl vinyl Q type silicone oil, hydrogen-containing silicone oil, inhibitor, and diluent according to the weight parts, and stir evenly; 2) Add the platinum catalyst to the premix, stir again until homogeneous, filter and degas to obtain the pre-coated slurry; 3) Apply the pre-coated slurry to the base film using a doctor blade, followed by heat curing to obtain the silicone OCA optical adhesive.

24. The application of a high refractive index and aging-resistant silicone OCA optical adhesive as described in any one of claims 1-22 in the field of screen display.

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