A kind of heat-resistant and reagent-resistant adhesive and preparation method thereof

Abstract

The present invention relates to the technical field of adhesives, and discloses a heat-resistant and reagent-resistant adhesive and a preparation method thereof, including 100 parts by weight of a polyurethane solution, 2-10 parts by weight of an aromatic epoxy-modified silicone oil, and 0.3-0.8 parts by weight of a defoamer; the aromatic epoxy-modified silicone oil contains an epoxy group, and during high-temperature curing, a ring-opening reaction occurs with a carboxyl group in a polyurethane molecular chain, thereby cross-linking and curing the aromatic epoxy-modified silicone oil with the polyurethane, which is beneficial to improving the peel strength, bonding performance, and high temperature resistance of the adhesive. The aromatic epoxy-modified silicone oil contains a flexible polysiloxane molecular chain and a rigid polyaryl structure, and reacts chemically with polyurethane, enhancing the interfacial compatibility between the two, and playing a better toughening and strengthening role. The adhesive prepared by the present invention has good heat resistance, water resistance, and solvent resistance.

Description

Technical Field

[0001] The invention relates to the technical field of adhesives, in particular to a temperature-resistant and chemical-resistant adhesive and a preparation method thereof. Background Art

[0002] Adhesives are mainly divided into room temperature curing adhesives, thermosetting adhesives, thermoplastic adhesives, etc. Among them, polyurethane adhesives are green and environmentally friendly, have good mechanical properties, excellent bonding properties, and are widely used in packaging, footwear, construction, wood processing, electrical and electronic fields. However, polyurethane has poor high temperature resistance, water resistance and solvent resistance, which limits the practical application of polyurethane adhesives.

[0003] Silicone oil is a polysiloxane polymer with strong chemical stability, high insulation, good hydrophobicity, and excellent resistance to solvent agents. It is widely used in polymer materials such as polyurethane, phenolic resin, and polyethylene, and can improve the mechanical properties, water resistance, and solvent resistance of materials. The invention patent with announcement number CN112920409B discloses that the reaction of alkyl silicon triol-terminated polysiloxane with dibasic acid can obtain a star-shaped polyester-modified polysiloxane with a stronger effect on polyurethane, and multiple polyester chains can be more firmly embedded in polyurethane, which can improve the durability, compatibility, and other properties of polyurethane synthetic leather. However, polyurethane materials do not show good high temperature resistance, water resistance, and solvent resistance. Summary of the invention

[0004] The technical problem solved by the invention is to provide a heat-resistant and reagent-resistant adhesive and a preparation method thereof, thereby solving the problem that the polyurethane adhesive has poor temperature resistance, water resistance and solvent resistance.

[0005] The technical scheme of the present invention is: a heat-resistant and reagent-resistant adhesive, comprising 100 parts by weight of a polyurethane solution, 2-10 parts by weight of an aromatic epoxy-modified silicone oil, and 0.3-0.8 parts by weight of a defoamer.

[0006] The preparation method of the aromatic epoxy modified polysiloxane is as follows: nitrogen is introduced into a reaction container, toluene, hydrogen-terminated silicone oil, bis(phenylvinyl glycidyl ether), and platinum water catalyst are added, heated to 90-100° C., reacted for 2-4 hours, distilled under reduced pressure, washed with methanol, and dried to obtain aromatic epoxy modified silicone oil.

[0007] The structural formula of bis(vinyl)glycidyl ether is formula (I):

[0008]

[0009] Furthermore, the molar ratio of the hydrogen-terminated silicone oil to the bis(phenylvinyl) glycidyl ether is 1:(1-1.2); the mass of Pt in the platinum water catalyst is 0.0015-0.003% of the mass of the hydrogen-terminated silicone oil.

[0010] Further, the preparation method of bisphenylethylene glycidyl ether is:

[0011] Step (1): nitrogen is introduced into a reaction vessel, tetrahydrofuran, 3,5-dibromophenol, 4-vinylbenzeneboronic acid, bis(1,2-bis(diphenylphosphine)ethane)palladium, potassium carbonate and water are added, and then the reaction vessel is placed in a reaction chamber of a microwave reactor, the power of the microwave reactor is controlled to be 150-300 W, and the reaction is carried out at 80-90° C. for 1-2 h. After cooling, the tetrahydrofuran is removed by distillation under reduced pressure, a precipitate is precipitated, and the precipitate is filtered. The product is recrystallized in ethyl acetate to obtain an intermediate A.

[0012] Step (2): introduce nitrogen into a reaction vessel, add intermediate A, tetrabutylammonium bromide and ethanol, stir to dissolve, then add sodium hydroxide, heat to 40-50°C, add epichlorohydrin dropwise, stir to react for 3-4h, remove ethanol and unreacted epichlorohydrin by distillation under reduced pressure, add an aqueous solution of sodium hydroxide, stir to react at 40-45°C for 2-3h, filter, wash with water and methanol, and recrystallize the product from ethyl acetate to obtain bis(phenylvinyl) glycidyl ether.

[0013] Furthermore, in step (1), the molar ratio of 3,5-dibromophenol, 4-vinylbenzeneboronic acid, bis(1,2-bis(diphenylphosphine)ethane)palladium and potassium carbonate is 1:(1.8-2.2):(0.014-0.018):(3.4-4).

[0014] Furthermore, in step (2), the molar ratio of intermediate A, epichlorohydrin, and tetrabutylammonium bromide is 1:(7-8):(0.022-0.026).

[0015] Furthermore, the preparation method of the polyurethane solution is as follows: add polyester polyol to a reaction container, dry and remove water, then introduce nitrogen, add isocyanate compound, react at 70-75°C for 2-3h, then add 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate, react for 30-40min, add triethylamine for neutralization, then add acetone, stir, then add 1,4-butanediol at 40-50°C, react for 30-40min, and obtain a polyurethane solution.

[0016] Furthermore, the isocyanate compound is toluene-2,4-diisocyanate, isophorone diisocyanate or hexamethylene diisocyanate.

[0017] Furthermore, a method for preparing the heat-resistant and reagent-resistant adhesive is as follows: a polyurethane solution, a defoaming agent, and an aromatic epoxy-modified silicone oil are added into a container, and the mixture is stirred to obtain the heat-resistant and reagent-resistant adhesive.

[0018] The technical effect of the present invention is as follows: the present invention adopts microwave-assisted reaction, and under the catalytic action of bis(1,2-bis(diphenylphosphine)ethane)palladium and potassium carbonate, 3,5-dibromophenol and 4-vinylbenzene boronic acid are subjected to Suzuki coupling reaction, and then ring-opening and ring-closing reactions are carried out with epichlorohydrin to obtain bisphenylethylene glycidyl ether, and finally under the action of platinum water catalyst, the double-terminal alkenyl group thereof is subjected to hydrosilylation reaction with terminal hydrogen silicone oil to obtain aromatic epoxy modified silicone oil.

[0019] The present invention uses polyurethane as the main agent of the adhesive, and the added aromatic epoxy modified silicone oil contains epoxy groups. During the high temperature curing process, the neutralizer triethylamine in the polyurethane can play a role as a catalyst, catalyzing the epoxy groups and the carboxyl groups in the polyurethane molecular chain to undergo a ring-opening reaction, thereby causing the aromatic epoxy modified silicone oil to undergo a cross-linking and curing reaction with the polyurethane to form a stable curing and cross-linking effect, which is beneficial to improving the peel strength and bonding performance of the adhesive. In addition, the aromatic epoxy modified silicone oil contains a heat-resistant polysiloxane molecular chain and a polyaryl structure, and is cured with the polyurethane to form a heat-resistant chemical cross-linking network, which is beneficial to improving the high temperature resistance of the adhesive. After a heat treatment at 180°C, the polyurethane adhesive still has a high peel strength and excellent bonding performance.

[0020] The aromatic epoxy modified silicone oil of the present invention undergoes a crosslinking and curing reaction with polyurethane, which is beneficial to increasing the degree of crosslinking between polyurethane molecular chains, preventing solvents such as water and ethanol from entering the adhesive film, thereby reducing the swelling rate and improving the reagent and solvent resistance of the adhesive.

[0021] The aromatic epoxy modified silicone oil of the present invention contains a flexible polysiloxane molecular chain and a rigid polyaryl structure, has the characteristics of good flexibility and high strength, and reacts chemically with polyurethane to enhance the interfacial compatibility between the two, so that the aromatic epoxy modified silicone oil plays a better toughening and strengthening role, and significantly improves the tensile strength and elongation at break of the adhesive film. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The Pt content of the platinum water catalyst of the present invention is 1000ppm; Shenzhen Sicheng Silica Gel Co., Ltd.

[0024] Example 1

[0025] (1): Nitrogen was introduced into the reaction vessel, 30 mL tetrahydrofuran, 5 mmol 3,5-dibromophenol, 10 mmol 4-vinylbenzene boronic acid, 0.07 mmol bis(1,2-bis(diphenylphosphine)ethane)palladium, 20 mmol potassium carbonate and 30 mL water were added, and then the reaction vessel was placed in the reaction chamber of the microwave reactor, the power of the microwave reactor was controlled to 300 W, and the reaction was carried out at 90°C for 1 h. After cooling, tetrahydrofuran was removed by vacuum distillation, and the precipitate was filtered. The product was recrystallized in ethyl acetate to obtain intermediate A. The yield was 1.37 g, gray solid. The reaction formula is as follows:

[0026]

[0027] (2): Nitrogen is introduced into the reaction vessel, 5 mmol of intermediate A, 0.11 mmol of tetrabutylammonium bromide, and 8 mL of ethanol are added, and 6 mmol of sodium hydroxide is added after stirring and dissolving, and the mixture is heated to 40°C, and 40 mmol of epichlorohydrin is added dropwise, and the mixture is stirred and reacted for 4 hours. The ethanol and unreacted epichlorohydrin are removed by distillation under reduced pressure, and 30 mL of an aqueous solution containing 5 mmol of sodium hydroxide is added, and the mixture is stirred and reacted at 40°C for 3 hours, filtered, washed with water and methanol, and the product is recrystallized from ethyl acetate to obtain bis(phenylvinyl) glycidyl ether. The yield is 1.09 g, and the product is a yellow solid. The reaction formula is as follows:

[0028]

[0029] Example 2

[0030] (1): Nitrogen was introduced into the reaction vessel, 40 mL of tetrahydrofuran, 5 mmol of 3,5-dibromophenol, 11 mmol of 4-vinylbenzene boronic acid, 0.09 mmol of bis(1,2-bis(diphenylphosphine)ethane)palladium, 17 mmol of potassium carbonate and 25 mL of water were added, and then the reaction vessel was placed in the reaction chamber of a microwave reactor, the power of the microwave reactor was controlled to be 150 W, and the reaction was carried out at 80° C. for 2 h. After cooling, tetrahydrofuran was removed by distillation under reduced pressure, and the precipitate was filtered. The product was recrystallized in ethyl acetate to obtain intermediate A. The yield was 1.28 g, gray solid.

[0031] (2): Nitrogen was introduced into the reaction vessel, 5 mmol of intermediate A, 0.13 mmol of tetrabutylammonium bromide, and 10 mL of ethanol were added, and 5 mmol of sodium hydroxide was added after stirring and dissolving, and the mixture was heated to 50°C, and 35 mmol of epichlorohydrin was added dropwise, and the mixture was stirred and reacted for 3 hours. The ethanol and unreacted epichlorohydrin were removed by distillation under reduced pressure, and 40 mL of an aqueous solution containing 6 mmol of sodium hydroxide was added, and the mixture was stirred and reacted at 45°C for 2 hours, and the mixture was filtered, washed with water and methanol, and the product was recrystallized from ethyl acetate to obtain bis(phenylvinyl) glycidyl ether. The yield was 1.21 g, and the mixture was a yellow solid.

[0032] Example 3

[0033] (1): nitrogen was introduced into the reaction vessel, 30 mL toluene, 20 mmol of hydrogen-terminated silicone oil, 22 mmol of bis(vinyl) glycidyl ether (prepared according to the method of Example 1), and platinum water catalyst were added, and the mass of Pt in the platinum water catalyst was controlled to be 0.0015% of the mass of hydrogen-terminated silicone oil; heated to 100°C, reacted for 3 hours, vacuum distilled, washed with methanol, and dried to obtain aromatic epoxy modified silicone oil. The reaction formula is as follows:

[0034]

[0035] (2) Add 50 mmol of polyester polyol 2000 with a total hydroxyl content in a reaction container, dry and remove water, then introduce nitrogen, add 130 mmol of isophorone diisocyanate, react at 75°C for 2 hours, then add 50 mmol of 2,2-dihydroxymethylpropionic acid and 0.12 mmol of dibutyltin dilaurate, react for 30 minutes, add triethylamine for neutralization, then add 150 mL of acetone, stir, then add 15 mmol of 1,4-butanediol at 50°C, react for 40 minutes, and obtain a polyurethane solution.

[0036] (3) Add 1000 g of polyurethane solution, 3 g of defoamer Sago-1900, and 20 g of aromatic epoxy modified silicone oil into a container, stir and mix to obtain a heat-resistant and reagent-resistant adhesive.

[0037] Example 4

[0038] (1) Nitrogen was introduced into a reaction vessel, and 40 mL of toluene, 20 mmol of terminal hydrogen silicone oil, 22 mmol of bis(vinyl) glycidyl ether (prepared according to the method of Example 1), and a platinum water catalyst were added, wherein the mass of Pt in the platinum water catalyst was controlled to be 0.002% of the mass of the terminal hydrogen silicone oil; the reaction was heated to 90° C., reacted for 4 h, and distilled under reduced pressure, washed with methanol, and dried to obtain an aromatic epoxy-modified silicone oil.

[0039] (2): Add 50 mmol of polyester polyol 2000 with a total hydroxyl content in a reaction container, dry and remove water, then introduce nitrogen, add 140 mmol of hexamethylene diisocyanate, react at 75°C for 2 hours, then add 50 mmol of 2,2-dihydroxymethylpropionic acid and 0.11 mmol of dibutyltin dilaurate, react for 30 minutes, add triethylamine for neutralization, then add 150 mL of acetone, stir, then add 20 mmol of 1,4-butanediol at 50°C, react for 40 minutes, and obtain a polyurethane solution.

[0040] (3) Add 1000 g of polyurethane solution, 8 g of defoamer Sago-1900, and 20 g of aromatic epoxy modified silicone oil into a container, stir and mix to obtain a heat-resistant and reagent-resistant adhesive.

[0041] Example 5

[0042] (1) Nitrogen was introduced into a reaction vessel, and 40 mL of toluene, 20 mmol of terminal hydrogen silicone oil, 20 mmol of bis(vinyl) glycidyl ether (prepared according to the method of Example 1), and a platinum water catalyst were added, wherein the mass of Pt in the platinum water catalyst was controlled to be 0.003% of the mass of the terminal hydrogen silicone oil; the reaction was heated to 100° C., reacted for 2 h, and vacuum distilled, washed with methanol, and dried to obtain an aromatic epoxy modified silicone oil.

[0043] (2) Add 50 mmol of polyester polyol 2000 with a total hydroxyl content in a reaction container, dry and remove water, then introduce nitrogen, add 140 mmol of toluene-2,4-diisocyanate, react at 70°C for 3 hours, then add 50 mmol of 2,2-dihydroxymethylpropionic acid and 0.12 mmol of dibutyltin dilaurate, react for 30 minutes, add triethylamine for neutralization, then add 150 mL of acetone, stir, then add 20 mmol of 1,4-butanediol at 40°C, react for 40 minutes, and obtain a polyurethane solution.

[0044] (3) Add 1000 g of polyurethane solution, 3 g of defoamer Sago-1900, and 20 g of aromatic epoxy modified silicone oil into a container, stir and mix to obtain a heat-resistant and reagent-resistant adhesive.

[0045] Comparative Example 1

[0046] The difference between this comparative example and Example 3 is that no aromatic epoxy-modified silicone oil is added to the adhesive.

[0047] (1) Add 1000 g of polyurethane solution and 3 g of defoamer Sago-1900 into a container, stir and mix to obtain a heat-resistant and reagent-resistant adhesive.

[0048] Comparative Example 2

[0049] The difference between this comparative example and Example 3 is that terminal hydrogen silicone oil is used instead of aromatic epoxy modified silicone oil.

[0050] (1) Add 1000 g of polyurethane solution, 3 g of defoamer Sago-1900, and 20 g of terminal hydrogen silicone oil into a container, stir and mix to obtain a heat-resistant and reagent-resistant adhesive.

[0051] Comparative Example 3

[0052] The difference between this comparative example and Example 3 is that, when preparing the modified silicone oil, intermediate A is used instead of bis(phenylvinyl) glycidyl ether.

[0053] (1): nitrogen is introduced into a reaction vessel, 30 mL of toluene, 20 mmol of terminal hydrogen silicone oil, 22 mmol of intermediate A, and platinum water catalyst are added, and the mass of Pt in the platinum water catalyst is controlled to be 0.0015% of the mass of the terminal hydrogen silicone oil; heating to 100° C., reacting for 3 h, vacuum distillation, methanol washing, and drying to obtain aromatic modified silicone oil.

[0054] (2) Add 1000 g of polyurethane solution, 3 g of defoamer Sago-1900, and 20 g of aromatic modified silicone oil into a container, stir and mix to obtain a heat-resistant and reagent-resistant adhesive.

[0055] The heat-resistant and chemical-resistant adhesive was applied to the surfaces of two PET substrates at a dosage of 6 g / m 2 , bonded to make a sample. Then placed in a heating box, heat cured at 100℃ for 3h; test the T-peel strength of the sample according to GB / T 2791-1995 method.

[0056] The bonded sample was placed in an oven and heat treated at 180°C for 48 hours, then cooled to room temperature, and the T-peel strength of the sample was tested.

[0057] Table 1 Adhesive peel strength test

[0058]

[0059] As can be seen from the table above, compared with Comparative Example 1, aromatic epoxy-modified silicone oil is added to the polyurethane adhesives of Examples 3, 4, and 5, which contain epoxy groups. During the high-temperature curing process, the neutralizer triethylamine in the polyurethane solution can act as a catalyst to catalyze the ring-opening reaction between the epoxy groups and the carboxyl groups in the polyurethane molecular chain, thereby causing the aromatic epoxy-modified silicone oil to undergo a cross-linking and curing reaction with the polyurethane to form a stable curing cross-linking effect, which is beneficial to improving the peel strength and bonding performance of the adhesive. In addition, the aromatic epoxy-modified silicone oil contains heat-resistant polysiloxane molecular chains and polyaryl structures. The heat-resistant chemical cross-linking network formed by curing with polyurethane is beneficial to improving the high temperature resistance of the adhesive. After heat treatment at 180°C, the polyurethane adhesive still has high peel strength, excellent bonding performance and good temperature resistance.

[0060] In the polyurethane adhesive of Comparative Example 2, hydrogen-terminated silicone oil is added, which does not contain epoxy groups; in Comparative Example 3, intermediate A is used instead of bis(phenylvinyl) glycidyl ether, and the prepared aromatic modified silicone oil does not contain epoxy groups and cannot react with the carboxyl group of polyurethane, resulting in the inability of silicone oil to crosslink and cure with polyurethane, resulting in low peel strength of the adhesive and poor bonding performance. In addition, the high temperature resistance is poor. After heat treatment at 180°C, the peel strength of the polyurethane adhesive decreases by a small amount, and the retention rate is low.

[0061] Pour the heat-resistant and chemical-resistant adhesive into the mold, then place it in a heating box and heat cure it at 100°C for 3 hours to make a film. Cut the film into 8cm×8cm×0.4cm specimens, weigh them (m0), and then place them in water, ethanol and toluene respectively, soak them for 24 hours, take out the film, wipe off the residual solvent on the surface, weigh them (m1), and calculate the swelling ratio Q. Q=(m1-m0) / m0×100%. The results are shown in Table 2.

[0062] Table 2 Solvent resistance test of heat-resistant and reagent-resistant adhesives

[0063]

[0064]

[0065] The aromatic epoxy-modified silicone oil added in Examples 3, 4, and 5 undergoes a crosslinking and curing reaction with the polyurethane, which is beneficial to increasing the degree of crosslinking between polyurethane molecular chains, preventing solvents such as water and ethanol from entering the adhesive film, thereby reducing the swelling rate and improving the reagent resistance of the adhesive.

[0066] The tensile properties of adhesive films were tested according to GB / T 528-2009.

[0067] Table 3 Tensile properties test of film

[0068] Tensile strength(MPa) Elongation at break (%) Example 3 12.3 588.3 Example 4 14.0 563.5 Example 5 12.8 580.6 Comparative Example 1 9.7 549.1 Comparative Example 2 9.2 512.7 Comparative Example 3 10.5 474.0

[0069] Aromatic epoxy-modified silicone oil is added to the polyurethane adhesive of Examples 3, 4, and 5. The aromatic epoxy-modified silicone oil contains a flexible polysiloxane molecular chain and a rigid polyaryl structure, and has the characteristics of good flexibility and high strength. It also reacts chemically with the polyurethane to enhance the interfacial compatibility between the two, so that the aromatic epoxy-modified silicone oil plays a better toughening and strengthening role, and significantly improves the tensile strength and elongation at break of the adhesive film.

[0070] The hydrogen-terminated silicone oil added in Comparative Example 2 and the aromatic-modified silicone oil added in Comparative Example 3 cannot react chemically with polyurethane, have poor compatibility with polyurethane, and have poor toughening and strengthening effects, making it difficult to effectively improve the tensile strength and elongation at break of the film.

[0071] Example 6

[0072] The difference between this embodiment and embodiment 3 is that the amount of the aromatic epoxy-modified silicone oil used is 40 g.

[0073] (1) Add 1000 g of polyurethane solution, 3 g of defoamer Sago-1900, and 40 g of aromatic epoxy modified silicone oil into a container, stir and mix to obtain a heat-resistant and reagent-resistant adhesive.

[0074] Example 7

[0075] The difference between this embodiment and embodiment 3 is that the amount of the aromatic epoxy-modified silicone oil used is 70 g.

[0076] (1) Add 1000 g of polyurethane solution, 3 g of defoamer Sago-1900, 70 g of aromatic epoxy modified silicone oil, and 20 g of aromatic epoxy modified silicone oil into a container, stir and mix to obtain a heat-resistant and reagent-resistant adhesive.

[0077] Example 8

[0078] The difference between this embodiment and embodiment 3 is that the amount of the aromatic epoxy-modified silicone oil used is 100 g.

[0079] (1): Add 1000 g of polyurethane solution, 3 g of defoamer Sago-1900, 100 g of aromatic epoxy modified silicone oil, and 20 g of aromatic epoxy modified silicone oil into a container, stir and mix to obtain a heat-resistant and reagent-resistant adhesive.

[0080] The T-peel strength, solvent swelling ratio and tensile properties of the adhesive were tested according to the above methods.

[0081] Table 4 Performance test of heat-resistant and reagent-resistant adhesive

[0082]

[0083]

[0084] After testing, it was found that when the dosage of aromatic epoxy modified silicone oil was different, the polyurethane adhesive showed good peel strength and high temperature resistance, as well as excellent resistance to solvent reagents and excellent tensile properties.

[0085] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A heat-resistant and chemical-resistant adhesive, characterized in that: The heat-resistant and chemical-resistant adhesive comprises 100 parts by weight of a polyurethane solution, 2-10 parts by weight of an aromatic epoxy-modified silicone oil, and 0.3-0.8 parts by weight of a defoamer; The preparation method of the aromatic epoxy modified silicone oil is as follows: nitrogen is introduced into a reaction container, toluene, hydrogen-terminated silicone oil, bis(phenylvinyl) glycidyl ether, and platinum water catalyst are added, heated to 90-100° C., reacted for 2-4 hours, distilled under reduced pressure, washed, and dried to obtain the aromatic epoxy modified silicone oil; The structural formula of the bis(vinyl)glycidyl ether is formula (I): The preparation method of the polyurethane solution comprises the following steps: adding polyester polyol to a reaction container, drying and removing water, then introducing nitrogen, adding an isocyanate compound, reacting at 70-75° C. for 2-3 hours, then adding 2,2-dihydroxymethylpropionic acid and dibutyltin dilaurate, reacting for 30-40 minutes, adding triethylamine for neutralization, then adding acetone, stirring, then adding 1,4-butanediol at 40-50° C., reacting for 30-40 minutes, and obtaining a polyurethane solution.

2. The heat-resistant and chemical-resistant adhesive according to claim 1, characterized in that: The molar ratio of the hydrogen-terminated silicone oil to the bis(phenylvinyl) glycidyl ether is 1:(1-1.2); the mass of Pt in the platinum water catalyst is 0.0015-0.003% of the mass of the hydrogen-terminated silicone oil.

3. The heat-resistant and chemical-resistant adhesive according to claim 1, characterized in that: The preparation method of the bisphenylethylene glycidyl ether is as follows: Step (1): introducing nitrogen into a reaction vessel, adding tetrahydrofuran, 3,5-dibromophenol, 4-vinylphenylboronic acid, bis(1,2-bis(diphenylphosphine)ethane)palladium, potassium carbonate and water, and then placing the reaction vessel in a reaction chamber of a microwave reactor to react, and after cooling, removing tetrahydrofuran by distillation under reduced pressure to precipitate a precipitate, filtering the precipitate, and recrystallizing the product in ethyl acetate to obtain an intermediate A; Step (2): introduce nitrogen into a reaction vessel, add intermediate A, tetrabutylammonium bromide and ethanol, stir to dissolve, then add sodium hydroxide, heat to 40-50°C, add epichlorohydrin dropwise, stir to react for 3-4h, remove ethanol and unreacted epichlorohydrin by distillation under reduced pressure, add an aqueous solution of sodium hydroxide, stir to react at 40-45°C for 2-3h, filter, wash with water and methanol, and recrystallize the product from ethyl acetate to obtain bis(phenylvinyl) glycidyl ether.

4. The heat-resistant and chemical-resistant adhesive according to claim 3, characterized in that: In the step (1), the molar ratio of 3,5-dibromophenol, 4-vinylbenzeneboronic acid, bis(1,2-bis(diphenylphosphine)ethane)palladium and potassium carbonate is 1:(1.8-2.2):(0.014-0.018):(3.4-4).

5. The heat-resistant and chemical-resistant adhesive according to claim 3, characterized in that: In the step (1), during the reaction, the power of the microwave reactor is controlled to be 150-300 W, the reaction temperature is 80-90° C., and the reaction time is 1-2 h.

6. The heat-resistant and chemical-resistant adhesive according to claim 3, characterized in that: In the step (2), the molar ratio of intermediate A, epichlorohydrin and tetrabutylammonium bromide is 1:(7-8):(0.022-0.026).

7. The heat-resistant and chemical-resistant adhesive according to claim 1, characterized in that: The isocyanate compound is toluene-2,4-diisocyanate, isophorone diisocyanate or hexamethylene diisocyanate.

8. A method for preparing the heat-resistant and chemical-resistant adhesive according to any one of claims 1 to 7, characterized in that: The preparation method comprises the following steps: adding a polyurethane solution, a defoaming agent, and an aromatic epoxy-modified silicone oil into a container, stirring and mixing the mixture, and obtaining a heat-resistant and reagent-resistant adhesive.

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