Anti-yellowing and anti-aging epoxy screen glue and preparation method thereof

Abstract

The invention discloses an anti-yellowing and anti-aging epoxy screen adhesive and a preparation method thereof. The anti-yellowing and anti-aging epoxy screen adhesive comprises the following raw material components in percentage by mass: 30-40% of an alicyclic epoxy resin prepolymer; 20 to 30% of toughened resin; 1.8-2% of a latent thermal initiator; 1-2% of fumed silica; 30-40% of silica powder; 0.1 to 0.2 percent of an antioxidant; and 0.2-0.3% of an anti-ultraviolet agent. The alicyclic epoxy resin prepolymer, the toughening resin and other components are reasonably matched, so that the product has the advantages of good cold and hot impact resistance, relatively good substrate bonding force and the like, and meanwhile, the yellowing resistance and the aging resistance of the product are greatly improved; according to the preparation method of the anti-yellowing and anti-aging epoxy screen glue, the reaction time and the reaction temperature in each step are just right by accurately controlling the technological parameters of the reaction, the high-quality product can be obtained, and the preparation method is simple and low in cost.

Description

Technical Field

[0001] The invention belongs to the technical field of adhesives and relates to an epoxy adhesive, in particular to an anti-yellowing and aging-resistant epoxy screen adhesive and a preparation method thereof. Background Art

[0002] A screen is a device or appliance used to display images and colors. It is divided into a silver screen and a screen, also known as a display screen. It is widely used in mobile phones, computers, monitors, televisions, and devices with image or text display functions. Screen glue is the glue used to stick the screen, which needs to have good resistance to cold and heat shock, anti-aging and anti-yellowing properties.

[0003] The Chinese invention patent with application number 201510481688.4 discloses a room temperature curing ultra-low temperature epoxy sealant and a preparation method thereof. The epoxy sealant includes 40 to 60 parts of polyurethane modified bisphenol S type glycidyl ether epoxy resin, 40 to 60 parts of 680 epoxy resin, 20 to 33 parts of alicyclic amine curing agent, and 10 to 30 parts of T-31 curing agent. The prepared epoxy sealant has good low-temperature bonding and sealing properties, but the water absorption rate is high. The Chinese invention patent with application number 202310783641.8 discloses an epoxy sealant for flexible display screens and a preparation method thereof. The epoxy sealant has the characteristics of low water absorption and high oxygen barrier rate, and can effectively protect flexible display screens. The preparation method comprises the following steps: mixing epoxy resin, polyetheramine, hydrotalcite composite material, dispersant and curing agent uniformly, then rolling them into a paste on a grinder, and then vacuum degassing to obtain epoxy sealant. However, the above epoxy sealants cannot satisfy the excellent yellowing resistance and aging resistance performance. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide an anti-yellowing and aging resistant epoxy screen adhesive.

[0005] In order to achieve the above object, the present invention provides an anti-yellowing and anti-aging epoxy screen adhesive, which comprises the following raw material components in percentage by mass:

[0006] Alicyclic epoxy resin prepolymer 30-40%;

[0007] Toughened resin 20-30%;

[0008] Latent thermal initiator 1.8-2%;

[0009] Fumed silica 1-2%;

[0010] Silica powder 30-40%;

[0011] Antioxidant 0.1-0.2%;

[0012] Anti-ultraviolet agent 0.2~0.3%.

[0013] Optimally, it is composed of the following raw material components in percentage by weight:

[0014] Alicyclic epoxy resin prepolymer 30-40%;

[0015] Toughened resin 20-30%;

[0016] Latent thermal initiator 1.8-2%;

[0017] Fumed silica 1-2%;

[0018] Silica powder 30-40%;

[0019] Antioxidant 0.1-0.2%;

[0020] Anti-ultraviolet agent 0.2~0.3%.

[0021] Furthermore, it is composed of the following raw material components in percentage by mass: 38% of alicyclic epoxy resin prepolymer, 22% of toughening resin, 1.8% of latent thermal initiator, 2% of fumed silica, 35.8% of silica powder, 0.15% of antioxidant and 0.25% of anti-ultraviolet agent.

[0022] Optimally, the alicyclic epoxy resin prepolymer is polymerized from an alicyclic epoxy resin, and the epoxide equivalent of the alicyclic epoxy resin is 100 to 190 g / mol.

[0023] Furthermore, the alicyclic epoxy resin is selected from a mixture of one or more of bis((3,4-epoxycyclohexyl)methyl)adipate, poly[(2-epoxyethylene)-1,2-cyclohexanediol]2-ethyl-2-(hydroxymethyl)-1,3-propylene glycol ether (3:1), 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexylmethyl ester, and (3,4,3',4'-diepoxy)dicyclohexane, and is copolymerized in proportion.

[0024] Furthermore, the alicyclic epoxy resin prepolymer comprises the following raw materials in percentage by weight:

[0025] Bis((3,4-epoxycyclohexyl)methyl)adipate: 40% to 50%;

[0026] Poly[(2-ethylene oxide)-1,2-cyclohexanediol]2-ethyl-2-(hydroxymethyl)-1,3-propylene glycol ether (3:1): 30% to 40%;

[0027] 3,4-Epoxycyclohexylmethyl-3',4'-epoxycyclohexylmethyl ester: 10% to 20%;

[0028] (3,4,3',4'-diepoxy)bicyclohexane: 5% to 15%;

[0029] Polycarbonate diol: 5%~15%.

[0030] Specifically, the preparation method of the alicyclic epoxy resin prepolymer is: add the formulated amount of the bis((3,4-epoxycyclohexyl)methyl)adipate, poly[(2-epoxyethylene)-1,2-cyclohexanediol]2-ethyl-2-(hydroxymethyl)-1,3-propylene glycol ether (3:1), 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexylmethyl ester and (3,4,3',4'-diepoxy)dicyclohexane into a container, heat up and stir to mix evenly; then add the formulated amount of the polycarbonate diol, stir and cool for use.

[0031] Optimally, the toughening resin is a mixture of one or more selected from Zhongyuan MX553, EPOTUF37-151, Junqiao HEF750, Junqiao HEF751, Junqiao CEF-2210 and Junqiao CEF-2810;

[0032] The latent thermal initiator is a mixture of one or more selected from blocked fluoromethanesulfonic acid, amine blocked hexafluoroantimonate, Lewis acid and complex;

[0033] The fumed silica is precipitated silica or fumed silica;

[0034] The antioxidant is a mixture of one or more selected from tris(2,4-di-tert-butylphenyl)phosphite, pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, triethylene glycol bis-β-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate, and β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate.

[0035] The anti-ultraviolet agent is a mixture of one or more selected from 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole, 2-(2'-hydroxy-5'-tert-octyl)phenylbenzotriazole, 4-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine-2-yl]-1,3-benzenediol, [(dodecyloxy)methyl]ethylene oxide and ethylene oxide mono[(C10-16 alkoxy)methyl] derivatives.

[0036] The silicon micropowder is a mixture of one or more selected from Silverbond925, Silverbond706, Silverbond S4, Minex 7 and Unispar X7.

[0037] Another object of the present invention is to provide a method for preparing the above-mentioned anti-yellowing and aging-resistant epoxy screen adhesive, comprising the following steps:

[0038] The alicyclic epoxy resin prepolymer, toughening resin, latent thermal initiator, fumed silica, silica powder, antioxidant and anti-ultraviolet agent in the formula amount are uniformly mixed and then ground to obtain a ground mixture;

[0039] The ground mixture is added into a centrifuge for centrifugal treatment, and then added into a planetary reactor and stirred until no bubbles are generated, and then allowed to stand and vent.

[0040] Optimally, the distances between the front and rear rollers of the grinding are 20 μm and 10 μm respectively, and the grinding is performed 3 to 5 times;

[0041] The centrifuge speed is 2000-5000 r / min, and the centrifugation time is 2-5 min.

[0042] The vacuum degree of the planetary reactor is -0.09 MPa and the temperature is 15°C-20°C.

[0043] The anti-yellowing and aging-resistant epoxy screen glue of the present invention adopts alicyclic epoxy resin prepolymer, toughening resin and other components for reasonable combination, so that the product has the advantages of good resistance to cold and heat shock, good substrate adhesion and the like, and greatly improves its anti-yellowing and aging resistance. The preparation method of the anti-yellowing and aging-resistant epoxy screen glue can precisely control the process parameters of the reaction so that the reaction time and reaction temperature in each step are just right, which is conducive to obtaining high-quality products, and the preparation method is simple and low in cost. DETAILED DESCRIPTION

[0044] The anti-yellowing and anti-aging epoxy screen glue of the present invention comprises the following raw material components in percentage by mass: 30-40% of alicyclic epoxy resin prepolymer; 20-30% of toughening resin; 1.8-2% of latent thermal initiator; 1-2% of fumed silica; 30-40% of silicon micropowder; 0.1-0.2% of antioxidant; and 0.2-0.3% of anti-ultraviolet agent. By adopting alicyclic epoxy resin prepolymer, toughening resin and other components for reasonable matching, the product has the advantages of good cold and heat shock resistance, good substrate bonding force and the like, and greatly improves its anti-yellowing and anti-aging properties.

[0045] It is preferably composed of the following raw material components in percentage by mass: 30-40% of alicyclic epoxy resin prepolymer; 20-30% of toughening resin; 1.8-2% of latent thermal initiator; 1-2% of fumed silica; 30-40% of silicon micropowder; 0.1-0.2% of antioxidant; 0.2-0.3% of anti-ultraviolet agent. When it is composed of the following raw material components in percentage by mass: 38% of alicyclic epoxy resin prepolymer, 22% of toughening resin, 1.8% of latent thermal initiator, 2% of fumed silica, 35.8% of silicon micropowder, 0.15% of antioxidant and 0.25% of anti-ultraviolet agent, the product has the best performance.

[0046] The above-mentioned alicyclic epoxy resin prepolymer is polymerized by alicyclic epoxy resin, and the epoxy equivalent of the alicyclic epoxy resin is 100 to 190 g / mol. The alicyclic epoxy resin is preferably selected from a mixture of one or more of bis((3,4-epoxycyclohexyl)methyl)adipate, poly[(2-oxirane)-1,2-cyclohexanediol]2-ethyl-2-(hydroxymethyl)-1,3-propylene glycol ether (3:1), 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexylmethyl ester, and (3,4,3',4'-diepoxy)bicyclohexane, and is copolymerized in proportion, specifically as follows: bis(( 3,4-Epoxycyclohexyl)methyl)adipate: 40% to 50%; Poly[(2-epoxyethylene)-1,2-cyclohexanediol]2-ethyl-2-(hydroxymethyl)-1,3-propylene glycol ether (3:1): 30% to 40%; 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexylmethyl ester: 10% to 20%; (3,4,3',4'-diepoxy)bicyclohexane: 5% to 15%; Polycarbonate diol: 5% to 15%.

[0047] The preparation method of the above-mentioned alicyclic epoxy resin prepolymer is as follows: add the formulated amount of the bis((3,4-epoxycyclohexyl)methyl)adipate, poly[(2-epoxyethylene)-1,2-cyclohexanediol]2-ethyl-2-(hydroxymethyl)-1,3-propylene glycol ether (3:1), 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexylmethyl ester and (3,4,3',4'-diepoxy)dicyclohexane into a container, heat up (preferably to 80-95°C) to stir and mix evenly; then cool down (preferably to 50-65°C), add the formulated amount of the polycarbonate diol, stir and cool (to room temperature) for use.

[0048] The toughened resin is required to comply with ROHS / REACH, such as a mixture of one or more selected from Zhongyuan MX553, EPOTUF37-151, Junqiao HEF750, Junqiao HEF751, Junqiao CEF-2210 and Junqiao CEF-2810. The latent thermal initiator refers to a curing agent that is added to the epoxy resin and the single-component system formed therewith has a certain storage stability at room temperature, and can rapidly undergo a curing reaction under conditions such as heating, light, moisture, and pressure. In a specific embodiment of the present invention, the latent curing agent used is one or a combination of several of blocked fluoromethanesulfonic acid, amine-blocked hexafluoroantimonate, Lewis acid and complex. The fumed silica is precipitated silica or fumed silica; preferably, the fumed silica is selected from Degussa fumed silica AEROSIL 200 with an original particle size of <300nn. The antioxidant is a mixture of one or more selected from tris(2,4-di-tert-butylphenyl)phosphite, tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]pentaerythritol, triethylene glycol bis-β-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate, and β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate isooctyl alcohol. The anti-ultraviolet agent is a mixture of one or more selected from 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole, 2-(2'-hydroxy-5'-tert-octyl)phenylbenzotriazole, 4-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine-2-yl]-1,3-benzene, [(dodecyloxy)methyl]ethylene oxide, and ethylene oxide mono[(C10-16 alkoxy)methyl] derivatives. The silicon micropowder is a mixture of one or more selected from Silverbond925, Silverbond706, Silverbond S4, Minex 7 and Unispar X7.

[0049] The method for preparing the above-mentioned anti-yellowing and anti-aging epoxy screen glue is characterized in that it includes the following steps: mixing the alicyclic epoxy resin prepolymer, toughening resin, latent thermal initiator, gas phase white carbon black, silicon powder, antioxidant and anti-ultraviolet agent in the formula amount and grinding them to obtain a grinding mixture; adding the grinding mixture into a centrifuge for centrifugal treatment, then adding it into a planetary reactor and stirring until no bubbles are generated, standing and exhausting. The front and rear roller spacings of the grinding are 20μm and 10μm respectively, and the grinding is 3 to 5 times; the centrifuge speed is 2000 to 5000r / min, and the centrifugal time is 2 to 5min; the vacuum degree of the planetary reactor is -0.09MPa and the temperature is 15℃-20℃.

[0050] In order to enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only embodiments of a part of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained under the premise of equivalent changes and modifications made by ordinary technicians in the field should belong to the scope of protection of the present invention.

[0051] Example 1

[0052] This embodiment provides an alicyclic epoxy resin prepolymer and a preparation method thereof, which are specifically as follows:

[0053] (a) bis((3,4-epoxycyclohexyl)methyl)adipate (45 kg, UVR-6128), poly[(2-oxiranyl)-1,2-cyclohexanediol]2-ethyl-2-(hydroxymethyl)-1,3-propylene glycol ether (3:1) (30 kg, CAS No. 244772-00-7), 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexylmethyl ester (15 kg, UVR-6110) and (3,4,3',4'-diepoxy)bicyclohexane (5 kg, TTA800) were weighed according to the corresponding mass and added into a container;

[0054] (b) heating the container in an oil bath (set at 90° C.), and stirring after heating to 90° C. to mix the raw resins evenly;

[0055] (c) The temperature was lowered to 60° C., polycarbonate diol (5 kg, Asahi Kasei 5650J) was added, and the mixture was kept warm and stirred for 1 hour; the mixture was then cooled to room temperature for later use.

[0056] Example 2

[0057] This embodiment provides an anti-yellowing and anti-aging epoxy screen adhesive, the raw materials of which are as follows:

[0058] 38 g of alicyclic epoxy resin prepolymer (used in Example 1), 22 g of toughening resin (MX553), 1.8 g of latent thermal initiator (Vicbase TC3632), 2 g of fumed silica (AEROSIL 200), and 2 g of antioxidant ( 1726) 0.15g, UV protection agent ( UV-1130) 0.25g and silica powder (Silverbond925) 35.8g.

[0059] The preparation method of the above-mentioned anti-yellowing and aging-resistant epoxy screen glue is as follows:

[0060] (S1) After uniformly mixing the above-mentioned amounts of alicyclic epoxy resin prepolymer, toughening resin, fumed silica, antioxidant, UV inhibitor, latent thermal initiator and silicon micropowder, adding the mixture to a grinder (the spacing between the front and rear rollers of the grinder is 20 μm and 10 μm, respectively) for grinding (grinding 3 to 5 times) to obtain a ground mixture; then adding the mixture to a centrifuge, adjusting the centrifuge speed to 3000 r / min, and centrifuging for 3 minutes.

[0061] (S2) Add the mixture obtained by centrifugation into a planetary reactor, adjust the vacuum degree of the planetary reactor to -0.09 MPa and the temperature to 15-20° C., stir until no bubbles are generated, let it stand and exhaust.

[0062] Example 3

[0063] This embodiment provides an anti-yellowing and anti-aging epoxy screen adhesive and a preparation method thereof, which is basically the same as that in Example 2, except that: 30 g of alicyclic epoxy resin prepolymer (used in Example 1), 30 g of toughening resin (MX553), 2.0 g of latent thermal initiator (Vicbase TC3632), 1.5 g of fumed silica (AEROSIL 200), and 1.5 g of antioxidant ( 1726) 0.20g, UV protection agent ( UV-1130) 0.20g and silica powder (Silverbond925) 36.1g.

[0064] Example 4

[0065] This embodiment provides an anti-yellowing and anti-aging epoxy screen adhesive and a preparation method thereof, which is basically the same as that in Embodiment 2, except that:

[0066] 40 g of alicyclic epoxy resin prepolymer (used in Example 1), 20 g of toughening resin (MX553), 1.9 g of latent thermal initiator (Vicbase TC3632), 1.0 g of fumed silica (AEROSIL 200), and 1.0 g of antioxidant ( 1726) 0.10g, UV protection agent ( UV-1130) 0.30g and silica powder (Silverbond925) 36.7g.

[0067] Comparative Example 1

[0068] This embodiment provides an anti-yellowing and aging-resistant epoxy screen glue and a preparation method thereof, which is basically the same as that in Example 2, except that the alicyclic epoxy resin prepolymer is prepared according to the method in Example 1, but poly [(2-ethylene oxide)-1,2-cyclohexanediol] 2-ethyl-2-(hydroxymethyl)-1,3-propylene glycol ether (3:1) is not used.

[0069] Comparative Example 2

[0070] This embodiment provides an anti-yellowing and anti-aging epoxy screen adhesive and a preparation method thereof, which is basically the same as that in Example 2, except that the alicyclic epoxy resin prepolymer uses commercially available TTA21.

[0071] Comparative Example 3

[0072] This embodiment provides an anti-yellowing and anti-aging epoxy screen adhesive and a preparation method thereof, which is basically the same as that in Example 2, except that: 45g of alicyclic epoxy resin prepolymer (used in Example 1), 16g of toughening resin (MX553), 1.5g of latent thermal initiator (Vicbase TC3632), 3g of fumed silica (AEROSIL 200), and 10g of antioxidant ( 1726) 0.3g, UV protection agent ( UV-1130) 0.6g and silica powder (Silverbond925) 33.6g.

[0073] Comparative Example 4

[0074] This embodiment provides an anti-yellowing and anti-aging epoxy screen adhesive and a preparation method thereof, which is basically the same as that in Example 2, except that: 26.7 g of alicyclic epoxy resin prepolymer (used in Example 1), 45 g of toughening resin (MX553), 1.5 g of latent thermal initiator (Vicbase TC3632), 3 g of fumed silica (AEROSIL 200), and 10 g of antioxidant ( 1726) 0.3g, UV protection agent ( UV-1130) 0.6g and silica powder (Silverbond925) 22.9g.

[0075] The performance of the epoxy screen adhesives in Examples 2-4 and Comparative Examples 1-4 was tested, and the results are shown in Table 1.

[0076] Table 1 Performance data of epoxy screen glue in Examples 2-4 and Comparative Examples 1-4

[0077]

[0078] Note: The specific environmental characteristics are: Restriction of Hazardous Substances Directive (RoHS) 2011 / 65 / EU and REACHSVHC 169 items issued by REACH.

[0079] At the same time, in order to more intuitively see the characteristics of the anti-yellowing and aging-resistant epoxy screen glue described in the present invention, the yellowing coefficient test was also carried out after baking at different temperatures for 24 hours. The results are shown in Table 2.

[0080] Table 2 Yellowing coefficient data of epoxy screen glue in Examples 2-4 and Comparative Examples 1-4

[0081]

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. At the same time, the above description should be understandable and implementable for those with ordinary knowledge in the relevant technical field. Therefore, other equivalent changes or modifications that do not deviate from the concepts disclosed in the present invention should be included in the scope of protection of the present invention.

Claims

1. An anti-yellowing and anti-aging epoxy screen adhesive, characterized in that: It includes the following raw material components in percentage by weight: Alicyclic epoxy resin prepolymer 30~40%; Toughened resin 20~30%; Latent thermal initiator 1.8~2%; Fumed silica 1~2%; Silica powder 30~40%; Antioxidant 0.1~0.2%; Anti-ultraviolet agent 0.2~0.3%.

2. The anti-yellowing and anti-aging epoxy screen adhesive according to claim 1, characterized in that: It is composed of the following raw material components in percentage by mass: Alicyclic epoxy resin prepolymer 30~40%; Toughened resin 20~30%; Latent thermal initiator 1.8~2%; Fumed silica 1~2%; Silica powder 30~40%; Antioxidant 0.1~0.2%; Anti-ultraviolet agent 0.2~0.3%.

3. The anti-yellowing and anti-aging epoxy screen adhesive according to claim 2, characterized in that: It is composed of the following raw material components in percentage by mass: 38% of alicyclic epoxy resin prepolymer, 22% of toughening resin, 1.8% of latent thermal initiator, 2% of fumed silica, 35.8% of silica powder, 0.15% of antioxidant and 0.25% of anti-ultraviolet agent.

4. The anti-yellowing and anti-aging epoxy screen adhesive according to claim 1, characterized in that: The alicyclic epoxy resin prepolymer is prepared by polymerizing an alicyclic epoxy resin, and the epoxide equivalent of the alicyclic epoxy resin is 100-190 g / mol.

5. The anti-yellowing and anti-aging epoxy screen adhesive according to claim 4, characterized in that: The alicyclic epoxy resin is selected from a mixture of one or more of bis((3,4-epoxycyclohexyl)methyl)adipate, poly[(2-epoxyethylene)-1,2-cyclohexanediol] 2-ethyl-2-(hydroxymethyl)-1,3-propylene glycol ether (3:1), 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexylmethyl ester, and (3,4,3',4'-diepoxy)bicyclohexane, and is copolymerized in proportion.

6. The anti-yellowing and anti-aging epoxy screen adhesive according to claim 5, characterized in that: The alicyclic epoxy resin prepolymer comprises the following raw materials in percentage by weight: Bis((3,4-epoxycyclohexyl)methyl)adipate: 40%~50%; Poly[(2-ethylene oxide)-1,2-cyclohexanediol] 2-ethyl-2-(hydroxymethyl)-1,3-propylene glycol ether (3:1): 30%~40%; 3,4-Epoxycyclohexylmethyl-3',4'-epoxycyclohexylmethyl ester: 10%~20%; (3,4,3',4'-diepoxy)bicyclohexane: 5%~15%; Polycarbonate diol: 5%~15%.

7. The anti-yellowing and anti-aging epoxy screen adhesive according to claim 5 or 6, characterized in that: The preparation method of the alicyclic epoxy resin prepolymer is as follows: adding the formulated amount of the bis((3,4-epoxycyclohexyl)methyl)adipate, poly[(2-epoxyethylene)-1,2-cyclohexanediol] 2-ethyl-2-(hydroxymethyl)-1,3-propylene glycol ether (3:1), 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexylmethyl ester and (3,4,3',4'-diepoxy)dicyclohexane into a container, heating up to stir and mix evenly; then adding the formulated amount of the polycarbonate diol, stirring and cooling for later use.

8. The anti-yellowing and anti-aging epoxy screen adhesive according to claim 1, characterized in that: The toughening resin is a mixture of one or more selected from Zhongyuan MX553, EPOTUF37-151, Junqiao HEF750, Junqiao HEF751, Junqiao CEF-2210 and Junqiao CEF-2810; The latent thermal initiator is a mixture of one or more selected from blocked fluoromethanesulfonic acid, amine blocked hexafluoroantimonate, Lewis acid and complex; The fumed silica is precipitated silica or fumed silica; The antioxidant is a mixture of one or more selected from tris(2,4-di-tert-butylphenyl)phosphite, pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, triethylene glycol bis-β-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate, and β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate. The anti-ultraviolet agent is a mixture of one or more selected from 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole, 2-(2'-hydroxy-5'-tert-octyl)phenylbenzotriazole, 4-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine-2-yl]-1,3-benzenediol, [(dodecyloxy)methyl]ethylene oxide and ethylene oxide mono[(C10-16 alkoxy)methyl] derivatives. The silicon powder is a mixture of one or more selected from Silverbond925, Silverbond706, Silverbond S4, Minex 7 and Unispar X7.

9. The method for preparing the anti-yellowing and anti-aging epoxy screen adhesive according to any one of claims 1 to 8, characterized in that: The following steps are involved: The alicyclic epoxy resin prepolymer, toughening resin, latent thermal initiator, fumed silica, silica powder, antioxidant and anti-ultraviolet agent in the formula amount are uniformly mixed and then ground to obtain a ground mixture; The ground mixture is added into a centrifuge for centrifugal treatment, and then added into a planetary reactor and stirred until no bubbles are generated, and then allowed to stand and vent.

10. The method for preparing the anti-yellowing and anti-aging epoxy screen adhesive according to claim 9, characterized in that: The distances between the front and rear rollers of the grinding are 20 μm and 10 μm respectively, and the grinding is performed 3 to 5 times; The centrifuge speed is 2000-5000 r / min, and the centrifugation time is 2-5 min. The vacuum degree of the planetary reactor is -0.09 MPa and the temperature is 15°C-20°C.

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