Adhesive applicable to adhesion of ethylene propylene rubber and polyester fibers and preparation method of adhesive

Abstract

The invention belongs to the technical field of adhesive preparation, and particularly relates to an adhesive applicable to adhesion of ethylene propylene rubber and polyester fibers and a preparation method of the adhesive. 11 to 12 parts of gallic acid; 10 to 30 parts of glucose; 10 to 20 parts of acetone / ethyl acetate; 8-10 parts of a silane coupling agent solution; 1-3 parts of a catalyst; and 100 to 150 parts of a solvent. The EPDM latex comprises the following components in parts by weight: 100 parts of ethylene propylene rubber; 30 to 60 parts of isocyanate; 10 to 15 parts of zinc oxide; 8-12 parts of rosin resin; 20-25 parts of light calcium carbonate; 25 to 30 parts of carbon black; 30 to 50 parts of white carbon black; 2-6 parts of an anti-aging agent; and 8-12 parts of a vulcanizing agent. The method has the advantages that a bridge effect is achieved between the ethylene propylene rubber and the polyester fiber material, and the bonding performance of the composite material is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of adhesive preparation, and in particular relates to an adhesive suitable for bonding ethylene-propylene rubber and polyester fiber and a preparation method thereof. Background Art

[0002] EPDM is a copolymer synthesized from ethylene and propylene as the basic monomers, so it has excellent aging resistance such as ozone resistance and heat resistance. Polyester fiber has good strength and stability. By combining with EPDM, it can significantly improve the physical properties of EPDM, and at the same time, improve its durability and service life. It is very common to use polyester fiber as a skeleton material in common EPDM products.

[0003] However, the main chain of EPDM is composed of chemically stable saturated hydrocarbons, and there are no active groups in the molecule that can participate in the reaction. At the same time, the polarity of EPDM and polyester fiber is very different, which makes the product easy to delaminate and slip during use, affecting the comprehensive performance and service life of the material. Therefore, it is very important to improve the interfacial adhesion between the two. In traditional industry, adhesives are often used to improve the interfacial adhesion between the two. Currently, most adhesives used in the market contain carcinogens such as formaldehyde, which are very harmful and have a long release cycle, which is very unfavorable to human health and environmental safety. Therefore, while improving the interfacial adhesion between the two, achieving the requirements of green environmental protection is a research topic that needs to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is to provide an adhesive suitable for bonding EPDM rubber and polyester fiber and a preparation method thereof, which overcomes the shortcomings of the prior art, can bond EPDM rubber and polyester fiber, two materials with very different properties, and play a bridging role between EPDM rubber and polyester fiber materials, thereby improving the performance of the composite material, so that the bonded EPDM rubber-polyester fiber composite material not only maintains the traditional excellent performance, but also has better bonding performance.

[0005] To achieve the above object, the present invention is implemented through the following technical solutions:

[0006] Technical solution 1: An adhesive suitable for bonding EPDM rubber and polyester fiber, wherein the components thereof are as follows in parts by weight: 100 parts of EPDM latex; 11-12 parts of gallic acid; 30 parts of glucose; 10-20 parts of acetone / ethyl acetate; 8-10 parts of silane coupling agent solution; 1-3 parts of catalyst; and 100-150 parts of solvent.

[0007] The components of the EPDM latex are as follows in parts by weight: 100 parts of ethylene-propylene rubber; 30-60 parts of isocyanate; 10-15 parts of zinc oxide; 8-12 parts of rosin resin; 20-25 parts of light calcium carbonate; 25-30 parts of carbon black; 30-50 parts of white carbon black; 2-6 parts of antioxidant; and 8-12 parts of vulcanizing agent.

[0008] The catalyst is any one of palladium carbon, tetrabutyl titanate, dibutyltin dilaurate, stannous oxide, stannous iodide, stannous acetate, stannous oxalate and stannous octoate.

[0009] The weight ratio of silane, alcohol and water in the silane coupling agent solution is 20:75:8, wherein the silane is aminosilane, and the alcohol is any one of methanol, ethanol and isopropanol or a combination of any two or more thereof.

[0010] The vulcanizing agent is any one of benzoyl peroxide, maleimide, N,N'-m-phenylene bismaleimide and N,N-ethylene bismaleimide.

[0011] The antioxidant is any one of antioxidant 4010, antioxidant 4010NA, and antioxidant MBP, or a combination of any two or more thereof.

[0012] The carbon black is any one of N330, N550, N660, N774 and N990 or a combination of any two or more thereof.

[0013] Technical solution 2: A method for preparing an adhesive suitable for bonding EPDM rubber and polyester fiber, specifically comprising the following steps:

[0014] 1) Preparation of EPDM latex: First, ethylene propylene rubber is plasticized on an open mill under the condition of turning on condensed water, and after three thin passes, the roller spacing is widened, isocyanate is added for mixing, and then antioxidant, zinc oxide, rosin resin, and light calcium carbonate are added in sequence for uniform mixing, carbon black and white carbon black are added for mixing after uniform mixing, and finally a vulcanizing agent is added for mixing, and the rubber is tapped and triangularly packaged, and finally thin passes are made to obtain EPDM rubber mixture, and the EPDM rubber mixture is cut into small pieces and put into a beaker containing a solvent, and sealed and left to stand for 4 hours, and then stirred by a high-speed lifting mixer to obtain EPDM latex;

[0015] 2) Preparation of adhesive: at room temperature, gallic acid and glucose are added to a solvent in proportion and stirred evenly, a catalyst is added, and the mixture is fully reacted at 200-210° C. for 2-4 hours, and the mixture is diluted with acetone after cooling to obtain a stable gallic acid tannin slurry; EPDM latex is added to the gallic acid tannin slurry, and stirred for 2-3 hours under a nitrogen atmosphere, and finally a silane coupling agent is added thereto, and stirred for 20-40 minutes to obtain an adhesive.

[0016] The solvent is any one of N-methylpyrrolidone, N,N-dimethylformamide, dichloromethane, tetrahydrofuran, and toluene, or a combination of any two or more thereof.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1) The adhesive of the present invention is added with a silane coupling agent, which can connect two materials with very different properties through its special molecular structure, and play a bridging role between the EPDM rubber and the polyester fiber material, thereby improving the performance of the composite material and having good bonding performance, so that the EPDM rubber-polyester fiber composite material after bonding has high bonding strength and H extraction force while maintaining the traditional excellent performance;

[0019] 2) The present invention uses biomass gallic acid and glucose to replace harmful substances in traditional adhesives, which reduces costs, reduces the release of harmful substances, improves safety, and complies with contemporary environmental protection concepts; isocyanate is added to the EPDM rubber compound for grafting modification, so that the EPDM latex and the gallic acid in the adhesive undergo a cross-linking reaction to form a three-dimensional network structure, thereby improving the bonding performance of the EPDM and polyester fiber composite materials; the use of biomass gallic acid and glucose to participate in the reaction has considerable bonding performance, so that the bonded EPDM-polyester fiber composite material has both high bonding performance and complies with contemporary environmental protection concepts;

[0020] 3) The present invention adds isocyanate to the EPDM latex formula, which gives the prepared latex stronger adhesive properties. At the same time, it can undergo a cross-linking reaction with gallic acid to generate a three-dimensional network structure, thereby improving the adhesive properties. After the polyester fiber is pre-activated by the adhesive, the expected adhesive effect can be achieved. The prepared adhesive is suitable for many fields such as electrical transmission and aviation transportation. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the specific embodiments required to be used in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some implementation methods of the present invention. For ordinary technicians in this field, other specific embodiments can be obtained based on these specific embodiments without paying creative work.

[0023] The components of the embodiments of the present invention generally described and shown in the specific embodiments herein can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the invention claimed, but merely represents selected embodiments of the present invention.

[0024] In the following embodiments, the catalyst palladium carbon can be replaced by any one of tetrabutyl titanate, dibutyltin dilaurate, stannous oxide, stannous iodide, stannous acetate, stannous oxalate, and stannous octoate. The weight ratio of silane, alcohol, and water in the silane coupling agent solution is 20:75:8, wherein the silane is aminosilane, and the alcohol is any one of methanol, ethanol, and isopropanol or any combination of two or more. The vulcanizing agent is any one of benzoyl peroxide, maleimide, N,N'-m-phenylene bismaleimide, and N,N-ethylene bismaleimide. The antioxidant is any one of antioxidant 4010, antioxidant 4010NA, and antioxidant MBP or any combination of two or more. Carbon black is any one of N330, N550, N660, N774, and N990 or any combination of two or more. The solvent is any one of N-methylpyrrolidone, N,N-dimethylformamide, dichloromethane, tetrahydrofuran, toluene or any combination of two or more thereof. Glucose in the components of the present invention can also be replaced by fructose / galactose / mannose / maltose within the same aldehyde ratio.

[0025] Example 1

[0026] A method for preparing an adhesive suitable for bonding ethylene-propylene rubber and polyester fiber, specifically comprising the following steps:

[0027] 1) Preparation of EPDM latex: First, with condensed water turned on, 100 parts of ethylene propylene diene monomer rubber are plasticized on an open mill. After three thin passes, the roller spacing is widened, 30 parts of isocyanate are added for uniform mixing, and then 0.5 parts of antioxidant 4010, 0.5 parts of antioxidant 4010NA, 1 part of antioxidant MBP, 10 parts of zinc oxide, 8 parts of rosin resin, 20 parts of light calcium carbonate are added in sequence, and mixed for 5 minutes. After mixing evenly, 10 parts of carbon black N330, 15 parts of N660, and 30 parts of white carbon black are added and mixed for 5 minutes, and finally 8 parts of benzoyl peroxide are added and mixed for 3 minutes. After tapping, triangle packages are made, and finally thin passes are made to obtain EPDM rubber mixture. Cut the EPDM rubber mixture into small pieces and put them into a beaker containing 230 parts of cyclohexane. After sealing and standing for 4 hours, stir it with a high-speed lifting mixer for 8 hours to obtain EPDM latex;

[0028] 2) Preparation of adhesive: At room temperature, add 11 parts of gallic acid and 30 parts of glucose to 100 parts of N-methylpyrrolidone and stir evenly, then add 1 part of palladium carbon, fully react at 200°C for 2 hours, cool and dilute with 10 parts of acetone to stabilize. Add 100 parts of EPDM latex to the above gallic acid tannin slurry and stir for 2 hours in the presence of nitrogen. Finally, add 8 parts of silane coupling agent (wherein the alcohol is methanol) and stir for 20 minutes to obtain an adhesive.

[0029] Example 2

[0030] A method for preparing an adhesive suitable for bonding ethylene-propylene rubber and polyester fiber, specifically comprising the following steps:

[0031] 1) Preparation of EPDM latex: First, 100 parts of ethylene propylene diene monomer rubber were plasticized on an open mill under the condition of turning on condensed water. After three thin passes, the roller spacing was widened, 60 parts of isocyanate were added for uniform mixing, and then 0.5 parts of antioxidant 4010, 0.5 parts of antioxidant 4010NA, 1 part of antioxidant MBP, 15 parts of zinc oxide, 12 parts of rosin resin, 25 parts of light calcium carbonate were added in sequence, and mixed for 5 minutes. After mixing evenly, 10 parts of carbon black N330, 15 parts of N660, and 30 parts of white carbon black were added and mixed for 5 minutes, and finally 12 parts of benzoyl peroxide were added and mixed for 3 minutes. After tapping, triangular packages were made, and finally thin passes were made to obtain EPDM rubber mix. The EPDM rubber mix was cut into small pieces and placed in a beaker containing 230 parts of cyclohexane. After being sealed and allowed to stand for 4 hours, it was stirred for 8 hours using a high-speed lifting mixer to obtain EPDM latex.

[0032] 2) Preparation of adhesive: At room temperature, add 11 parts of gallic acid and 30 parts of glucose to 150 parts of N-methylpyrrolidone and stir evenly, then add 2 parts of palladium carbon, fully react at 210°C for 2 hours, cool and dilute with 20 parts of ethyl acetate to stabilize. Add 100 parts of EPDM latex to the above gallic acid tannin slurry and stir for 2 hours in the presence of nitrogen. Finally, add 8 parts of silane coupling agent (wherein the alcohol is methanol) and stir for 20 minutes to obtain an adhesive.

[0033] Example 3

[0034] A method for preparing an adhesive suitable for bonding ethylene-propylene rubber and polyester fiber, specifically comprising the following steps:

[0035] 1) Preparation of EPDM latex: First, 100 parts of ethylene propylene diene monomer rubber were plasticized on an open mill under the condition of turning on condensed water. After three thin passes, the roller spacing was widened, 30 parts of isocyanate were added for uniform mixing, and then 2 parts of antioxidant 4010, 4 parts of antioxidant 4010NA, 10 parts of zinc oxide, 8 parts of rosin resin, 20 parts of light calcium carbonate were added in sequence, and mixed for 5 minutes. After mixing evenly, 10 parts of carbon black N330, 15 parts of N660, and 30 parts of white carbon black were added for mixing for 5 minutes, and finally 8 parts of N, N'-m-phenylene bismaleimide were added for mixing for 3 minutes. After tapping, the rubber was triangularly packaged, and finally thin passes were made to obtain EPDM rubber mix. The EPDM rubber mix was cut into small pieces and placed in a beaker containing 230 parts of cyclohexane. After being sealed and allowed to stand for 4 hours, it was stirred for 8 hours using a high-speed lifting mixer to obtain EPDM latex.

[0036] 2) Preparation of adhesive: At room temperature, add 11 parts of gallic acid and 30 parts of glucose to 100 parts of N-methylpyrrolidone and stir evenly, then add 1 part of tetrabutyl titanate, fully react at 210°C for 2 hours, cool and dilute with 10 parts of acetone to stabilize. Add EPDM latex to the above gallic acid tannin slurry and stir for 2 hours in the presence of nitrogen. Finally, add 8 parts of silane coupling agent (wherein the alcohol is methanol) and stir for 20 minutes to obtain an adhesive.

[0037] Example 4

[0038] A method for preparing an adhesive suitable for bonding ethylene-propylene rubber and polyester fiber, specifically comprising the following steps:

[0039] 1) Preparation of EPDM latex: First, 100 parts of ethylene propylene diene monomer rubber were plasticized on an open mill under the condition of turning on condensed water. After three thin passes, the roller spacing was widened, 30 parts of isocyanate were added for uniform mixing, and then 0.5 parts of antioxidant 4010, 0.5 parts of antioxidant 4010NA, 1 part of antioxidant MBP, 10 parts of zinc oxide, 6 parts of rosin resin, 20 parts of light calcium carbonate were added in sequence, and mixed for 5 minutes. After mixing evenly, 15 parts of carbon black N330, 10 parts of N660, and 30 parts of white carbon black were added and mixed for 5 minutes, and finally 12 parts of maleimide were added and mixed for 3 minutes. After tapping, triangular packages were made, and finally thin passes were made to obtain EPDM rubber mix. The EPDM rubber mix was cut into small pieces and placed in a beaker containing 230 parts of cyclohexane. After being sealed and allowed to stand for 4 hours, it was stirred for 8 hours using a high-speed lifting mixer to obtain EPDM latex.

[0040] 2) Preparation of adhesive: At room temperature, add 11 parts of gallic acid and 30 parts of glucose to 100 parts of N-methylpyrrolidone and stir evenly, then add 1 part of palladium carbon, fully react at 200°C for 2 hours, cool and dilute with 10 parts of acetone to stabilize it. Add EPDM latex to the above gallic acid tannin slurry and stir for 3 hours in the presence of nitrogen. Finally, add 10 parts of silane coupling agent (wherein the alcohol is methanol and ethanol, the ratio is 1:1) and stir for 20 minutes to obtain an adhesive.

[0041] Example 5

[0042] A method for preparing an adhesive suitable for bonding ethylene-propylene rubber and polyester fiber, specifically comprising the following steps:

[0043] 1) Preparation of EPDM latex: First, 100 parts of EPDM rubber were plasticized on an open mill under the condition of turning on condensed water. After three thin passes, the roller spacing was widened, 30 parts of isocyanate were added for uniform mixing, and then 0.5 parts of antioxidant 4010, 0.5 parts of antioxidant 4010NA, 1 part of antioxidant MBP, 10 parts of zinc oxide, 6 parts of rosin resin, 20 parts of light calcium carbonate were added in sequence, and mixed for 5 minutes. After mixing evenly, 10 parts of carbon black N330, 15 parts of N660, and 30 parts of white carbon black were added for mixing for 5 minutes, and finally 8 parts of N,N-ethylene bismaleimide were added for mixing for 3 minutes. After tapping, the rubber was triangularly packaged, and finally thinly passed to obtain EPDM rubber compound. The EPDM rubber compound was cut into small pieces and placed in a beaker containing 230 parts of cyclohexane. After being sealed and allowed to stand for 4 hours, it was stirred for 8 hours using a high-speed lifting mixer to obtain EPDM latex.

[0044] 2) Preparation of adhesive: At room temperature, add 11 parts of gallic acid and 30 parts of glucose to 100 parts of N-methylpyrrolidone and stir evenly, then add 1 part of palladium carbon, fully react at 200°C for 4 hours, cool and dilute with 10 parts of acetone to stabilize. Add EPDM latex to the above gallic acid tannin slurry and stir for 3 hours in the presence of nitrogen. Finally, add 8 parts of silane coupling agent (wherein the alcohol is ethanol) and stir for 20 minutes to obtain an adhesive.

[0045] Example 6

[0046] A method for preparing an adhesive suitable for bonding ethylene-propylene rubber and polyester fiber, specifically comprising the following steps:

[0047] 1) Preparation of EPDM latex: First, 100 parts of ethylene propylene diene monomer rubber were plasticized on an open mill under the condition of turning on condensed water. After three thin passes, the roller spacing was widened, 30 parts of isocyanate were added for uniform mixing, and then 0.5 parts of antioxidant 4010, 0.5 parts of antioxidant 4010NA, 1 part of antioxidant MBP, 10 parts of zinc oxide, 6 parts of rosin resin, 20 parts of light calcium carbonate were added in sequence, and mixed for 5 minutes. After mixing evenly, 15 parts of carbon black N330, 15 parts of N660, and 30 parts of white carbon black were added and mixed for 5 minutes, and finally 4 parts of benzoyl peroxide and 8 parts of maleimide were added and mixed for 3 minutes. After tapping, triangle packages were made, and finally thin passes were made to obtain EPDM mixed rubber. The EPDM rubber mixture was cut into small pieces and put into a beaker containing 230 parts of cyclohexane. After being sealed and allowed to stand for 4 hours, it was stirred for 8 hours using a high-speed lifting stirrer to obtain EPDM latex.

[0048] 2) Preparation of adhesive: At room temperature, add 12 parts of gallic acid and 30 parts of glucose to 100 parts of N-methylpyrrolidone and stir evenly, then add 1.5 parts of palladium carbon, fully react at 200°C for 4 hours, cool and dilute with 10 parts of acetone to stabilize it. Add EPDM latex to the above gallic acid tannin slurry and stir for 2 hours in the presence of nitrogen. Finally, add 10 parts of silane coupling agent (wherein the alcohol is ethanol and isopropanol, the ratio is 1:1) and stir for 20 minutes to obtain an adhesive.

[0049] Example 7

[0050] A method for preparing an adhesive suitable for bonding ethylene-propylene rubber and polyester fiber, specifically comprising the following steps:

[0051] 1) Preparation of EPDM latex: First, 100 parts of ethylene propylene diene monomer rubber were plasticized on an open mill under the condition of turning on condensed water. After three thin passes, the roller spacing was widened, 30 parts of isocyanate were added for uniform mixing, and then 40106 parts of antioxidant, 10 parts of zinc oxide, 6 parts of rosin resin, 20 parts of light calcium carbonate were added in sequence, and mixed for 5 minutes. After mixing evenly, 25 parts of carbon black N330 and 50 parts of white carbon black were added and mixed for 5 minutes, and finally 8 parts of benzoyl peroxide were added and mixed for 3 minutes. After tapping, triangle packages were made, and finally thin passes were made to obtain EPDM rubber mix. The EPDM rubber mix was cut into small pieces and placed in a beaker containing 230 parts of cyclohexane. After being sealed and allowed to stand for 4 hours, it was stirred for 8 hours using a high-speed lifting mixer to obtain EPDM latex.

[0052] 2) Preparation method of adhesive: At room temperature, add 12 parts of gallic acid and 30 parts of glucose to 150 parts of N-methylpyrrolidone and stir evenly, then add 2 parts of palladium carbon, fully react at 200°C for 4 hours, cool and dilute with 10 parts of acetone to stabilize it. Add EPDM latex to the above gallic acid tannin slurry and stir for 2 hours in the presence of nitrogen. Finally, add 8 parts of silane coupling agent (wherein the alcohol is methanol and isopropanol, the ratio is 1:1) and stir for 20 minutes to obtain an adhesive.

[0053] Example 8

[0054] A method for preparing an adhesive suitable for bonding ethylene-propylene rubber and polyester fiber, specifically comprising the following steps:

[0055] 1) Preparation of EPDM latex: Same as Example 1

[0056] 2) Preparation of adhesive: At room temperature, add 12 parts of gallic acid and 30 parts of glucose to 150 parts of N-methylpyrrolidone and stir evenly, then add 1 part of palladium carbon, fully react at 200°C for 2 hours, cool and dilute with 20 parts of acetone to stabilize it. Add EPDM latex to the above gallic acid tannin slurry and stir for 2 hours in the presence of nitrogen. Finally, add 10 parts of silane coupling agent (wherein the alcohol is methanol, ethanol, isopropanol, the ratio is 1:1:1) and stir for 20 minutes to obtain an adhesive.

[0057] Comparative Example

[0058] Commercially available resorcinol-formaldehyde adhesive

[0059] The adhesives of Examples 1 to 8 and the comparative example were used for the bonding strength test and H pull-out force test of EPDM rubber and polyester fiber. The bonding strength was tested according to the method of GB / T 532-2008; the H pull-out force was tested according to GB / T 2942-2009. The experimental results are shown in Table 1.

[0060] Table 1 Adhesion strength and H pull-out force test results

[0061] H Extraction force (N) Adhesion strength (N / cm) Example 1 106.2 12.6 Example 2 137.8 19.7 Example 3 95.4 12.5 Example 4 92.0 11.7 Example 5 104.9 12.7 Example 6 125.2 16.4 Example 7 86.7 10.83 Example 8 111.0 15.8 Comparative Example 74.5 9.22

[0062] It can be seen from the above experimental data that: compared with the comparative example, the adhesives prepared in Examples 1 to 8 of the present invention maintain a relatively high bonding strength and H extraction force when applied to the bonding of EPDM rubber and polyester fiber, especially Example 2, that is, the addition of silane coupling agent in the adhesive plays a bridging role between EPDM rubber and fiber material, and the isocyanate added to the EPDM rubber compound causes the EPDM latex to undergo a cross-linking reaction with the gallic acid in the adhesive to form a three-dimensional network structure, so that the bonded EPDM rubber-polyester fiber composite material not only ensures the traditional excellent performance, but also has good bonding performance. The present invention starts with improving the interfacial bonding performance, solves the technical problems in the industrial composite pipe industry that the industrial composite pipe products are prone to delamination and slippage during use due to the large difference in polarity between EPDM rubber and polyester fiber, and makes the comprehensive performance of industrial composite pipe products better and the service life longer.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adhesive suitable for bonding EPDM rubber and polyester fiber, characterized in that: The components are as follows in parts by weight: 100 parts of EPDM latex; 11-12 parts of gallic acid; 30 parts of glucose; 10-20 parts of acetone / ethyl acetate; 8-10 parts of silane coupling agent solution; 1-3 parts of catalyst; and 100-150 parts of solvent.

2. The adhesive for bonding EPDM rubber and polyester fiber according to claim 1, characterized in that: The components of the EPDM latex are as follows in parts by weight: 100 parts of ethylene-propylene rubber; 30-60 parts of isocyanate; 10-15 parts of zinc oxide; 8-12 parts of rosin resin; 20-25 parts of light calcium carbonate; 25-30 parts of carbon black; 30-50 parts of white carbon black; 2-6 parts of antioxidant; and 8-12 parts of vulcanizing agent.

3. The adhesive for bonding EPDM rubber and polyester fiber according to claim 1, characterized in that: The gallic acid and glucose are added in an amount according to a ratio of hydroxyl group to aldehyde group of 1.1:1 to 1.2:

1.

4. The adhesive for bonding EPDM rubber and polyester fiber according to claim 1, characterized in that: The catalyst is any one of palladium carbon, tetrabutyl titanate, dibutyltin dilaurate, stannous oxide, stannous iodide, stannous acetate, stannous oxalate and stannous octoate.

5. The adhesive for bonding EPDM rubber and polyester fiber according to claim 1, characterized in that: The weight ratio of silane, alcohol and water in the silane coupling agent solution is 20:75:8, wherein the silane is aminosilane, and the alcohol is any one of methanol, ethanol and isopropanol or a combination of any two or more thereof.

6. The adhesive for bonding EPDM rubber and polyester fiber according to claim 2, characterized in that: The vulcanizing agent is any one of benzoyl peroxide, maleimide, N,N'-m-phenylene bismaleimide and N,N-ethylene bismaleimide.

7. The adhesive for bonding EPDM rubber and polyester fiber according to claim 2, characterized in that: The antioxidant is any one of antioxidant 4010, antioxidant 4010NA, and antioxidant MBP, or a combination of any two or more thereof.

8. The adhesive for bonding EPDM rubber and polyester fiber according to claim 2, characterized in that: The carbon black is any one of N330, N550, N660, N774 and N990 or a combination of any two or more thereof.

9. A method for preparing an adhesive suitable for bonding ethylene-propylene rubber and polyester fiber, characterized in that: The specific steps include: 1) Preparation of EPDM latex: First, ethylene propylene rubber is plasticized on an open mill under the condition of turning on condensed water, and after three thin passes, the roller spacing is widened, isocyanate is added for mixing, and then antioxidant, zinc oxide, rosin resin, and light calcium carbonate are added in sequence for uniform mixing, carbon black and white carbon black are added for mixing after uniform mixing, and finally a vulcanizing agent is added for mixing, and the rubber is tapped and triangularly packaged, and finally thin passes are made to obtain EPDM rubber mixture, and the EPDM rubber mixture is cut into small pieces and put into a beaker containing a solvent, and sealed and left to stand for 4 hours, and then stirred by a high-speed lifting mixer to obtain EPDM latex; 2) Preparation of adhesive: at room temperature, gallic acid and glucose are added to a solvent in proportion and stirred evenly, a catalyst is added, and the mixture is fully reacted at 200-210° C. for 2-4 hours, and the mixture is diluted with acetone after cooling to obtain a stable gallic acid tannin slurry; EPDM latex is added to the gallic acid tannin slurry, and stirred for 2-3 hours under a nitrogen atmosphere, and finally a silane coupling agent is added thereto, and stirred for 20-40 minutes to obtain an adhesive.

10. The method for preparing an adhesive suitable for bonding EPDM rubber and polyester fiber according to claim 9, characterized in that: The solvent is any one of N-methylpyrrolidone, N,N-dimethylformamide, dichloromethane, tetrahydrofuran, and toluene, or a combination of any two or more thereof.