A water-oil universal adhesion promoter and preparation method thereof

Abstract

The present invention relates to the field of coatings, and in particular to a water-oil universal adhesion promoter and a preparation method thereof. The water-oil universal adhesion promoter, in terms of mass percentage, comprises raw materials including: 5-10% acid agent, 25-35% base resin, 10-15% modified resin, 5-10% auxiliary agent, and the remainder of solvent. The present invention provides a water-oil universal adhesion promoter, which not only has excellent adhesion promotion effect and coating film mechanical property enhancement effect, but also can effectively improve the weather resistance and waterproof performance of the coating film. More importantly, it can be used in both water-oil and two-type coating products at the same time, reducing the specific selectivity of the previous adhesion promoter for the coating film substrate, and has very excellent applicability in the coating industry and broad market application prospects.

Description

Technical Field

[0001] The invention relates to the field of coatings, and in particular to a water-oil universal adhesion promoter and a preparation method thereof. Background Art

[0002] Good adhesion between the hardened coating and the substrate is the basis for coating film products to obtain the required characteristics. The degree of adhesion is not only related to the surface state of the substrate, the surface material composition and the density of the material itself, but also to the shrinkage stress, surface tension, crystallinity and volume size of the polar functional groups of the film-forming substances in the coating film. Over the years, people have not only been committed to improving the tensile strength of the coating film itself, but also tried to find ways to continuously improve the adhesion of the coating to extend the adhesion time of the coating, so as to achieve long-term protection of the substrate by the coating and maintain its characteristics.

[0003] Adhesion promoter is one of the most commonly used methods in the coating industry to improve the coating performance of materials and enhance the adhesion of the coating film on the substrate. It is easy to use and has significant effects. Currently, commonly used adhesion promoters are divided into silanes, titanates, zirconates, zirconium-aluminate, metal organic compounds, phenolic resins, etc. according to molecular types. However, no matter which type of adhesion promoter is used, it has obvious selectivity for the substrate and the paint film, and the effects are different, which brings many inconveniences to practical industrial applications.

[0004] Therefore, in order to solve the above problems, the present invention provides a universal water-oil adhesion promoter, which not only can play an excellent adhesion promoting role and enhance the mechanical properties of the coating, but also can effectively improve the weather resistance and waterproof performance of the coating. More importantly, it can be used in both water- and oil-based paint products, reducing the specific selectivity of previous adhesion promoters for the coating matrix, and has excellent applicability in the coating industry and broad market application prospects. Summary of the invention

[0005] In order to solve the above problems, the first aspect of the present invention provides a universal water-oil adhesion promoter, which comprises, by mass percentage, 5-10% acid agent, 25-35% base resin, 10-15% modified resin, 5-10% auxiliary agent, and the remainder is supplemented by solvent.

[0006] As a preferred solution, the acid agent is at least one of phosphoric acid, acetic acid, hydrochloric acid and hypophosphorous acid.

[0007] As a preferred solution, the acid agent is phosphoric acid or hypophosphorous acid.

[0008] As a preferred solution, the acid agent is hypophosphorous acid.

[0009] As a preferred solution, the preparation method of the matrix resin includes the following steps: S1: adding glycidyl methacrylate, ethyl methacrylate and benzophenone into a reaction container and irradiating the reaction under air for 1 to 2 hours. After the reaction is completed, the precipitate is filtered to obtain a prepolymer monomer; S2: placing the prepolymer monomer into acetone, adding 3-aminopropyltriethoxysilane and heating the mixture to 60 to 65° C. and stirring the mixture for 1 to 2 hours; S3: mixing the product of S2 with pyromellitic acid, malonic acid, hydroxymethyl bisphenol A diglycidyl ether and triphenylphosphine and heating the mixture to 60 to 80° C. and stirring the mixture in a sealed manner for 10 to 14 hours to obtain the matrix resin.

[0010] As a preferred solution, the mass ratio of glycidyl methacrylate, ethyl methacrylate and benzophenone is (15-20):(4-6):(0.5-1.5).

[0011] As a preferred solution, the mass ratio of the prepolymer monomer to 3-aminopropyltriethoxysilane is (15-20): (1-1.5).

[0012] As a preferred solution, the mass ratio of pyromellitic acid, malonic acid, hydroxymethyl bisphenol A diglycidyl ether and triphenylphosphine is (12-14): (3-5): (10-15): (0.1-0.2).

[0013] As a preferred solution, the mass ratio of pyromellitic acid, malonic acid, hydroxymethyl bisphenol A diglycidyl ether and triphenylphosphine is 13.5:4:12:0.2.

[0014] In the present invention, the addition of the above-mentioned base resin can greatly enhance the promoting effect of the adhesion promoter, and can ensure the applicability of the promoter to both water and oil. The various free groups carried by the above-mentioned base resin and the modified resin can work together to produce a good cross-linking effect with the coating matrix, thereby improving the adhesion and bonding effect between the coating film and the substrate; on the other hand, the large number of active groups such as carboxyl groups carried by the base resin can greatly increase the cross-linking density of the polymer system after being added to the coating system, and enhance the free efficiency of the adhesion promoter itself in the system, thereby uniformly acting on the coating surface, greatly increasing the content of the polymer resin on the surface, thereby having excellent surface density strength and hydrophobic properties.

[0015] As a preferred solution, the preparation method of the modified resin includes the following steps: S1: methacrylate and alcohol ether are mixed and added into a reaction container, and after mixing evenly, organic anhydride is added and the temperature is raised to 50-60°C and kept warm for 1-2 hours; S2: after the insulation is completed, γ-aminopropyltriethoxysilane is added, the temperature is raised to 65-80°C, polyphosphoric acid is added to react for 6-12 hours, and after the reaction is completed, pure water is added and the temperature is lowered to 50-55°C and kept warm for 1-2 hours, and the product is obtained after completion.

[0016] As a preferred solution, the methacrylate is at least one of glycidyl methacrylate, isobutyl methacrylate, and hydroxypropyl methacrylate.

[0017] As a preferred solution, the methacrylate is glycidyl methacrylate.

[0018] As a preferred solution, the alcohol ether is at least one of stearyl alcohol polyoxyethylene ether, cetyl alcohol polyoxyethylene ether, and isomeric tetradecanol ether.

[0019] As a preferred solution, the alcohol ether is stearyl alcohol polyoxyethylene ether.

[0020] As a preferred solution, the mass ratio of the methacrylate to the alcohol ether is (40-45):(5-10).

[0021] As a preferred solution, the organic acid anhydride is at least one of succinic anhydride, maleic anhydride, phthalic anhydride, acrylic anhydride and adipic anhydride.

[0022] As a preferred solution, the organic acid anhydride is succinic anhydride.

[0023] As a preferred solution, the amount of polyphosphoric acid added is 30-50% of the total mass of methacrylate and alcohol ether.

[0024] As a preferred solution, the phosphorus pentoxide content of the polyphosphoric acid is 88%; the viscosity of the polyphosphoric acid is 34000-38000 cP.

[0025] In the present invention, the addition of the modified resin can effectively enhance the effect of the adhesion promoter on improving the mechanical properties of the coating film, reduce the brittleness of the coating film, and enhance the water resistance and weather resistance. In the present invention, the modified resin can react with the base resin and the active groups such as amino and carboxyl groups in the coating system, thereby linking to the long chain of the film-forming resin through coordination, grafting and hydrogen bonding, and this multi-action connection method also greatly reduces the system selectivity of the adhesion promoter for the coating body; on the other hand, after being added to the long chain, the more complex multi-branched long chain structure can better form a dense network structure of the coating, which not only reduces the movement and migration rate and number of active molecules, but also reduces the collision probability between active molecules, thereby avoiding the probability of deterioration reaction, and at the same time can increase the path and resistance of water molecules invading the deep part of the coating, thereby greatly improving the weather resistance and water resistance during the long-term use of the coating.

[0026] As a preferred solution, the auxiliary agent is a combination of polyamine, surfactant and defoamer.

[0027] As a preferred solution, the mass ratio of the polyamine, the surfactant and the defoaming agent is (10-15): (5-10): (1-3).

[0028] As a preferred solution, the mass ratio of the polyamine, the surfactant and the defoaming agent is (12-14): (6-8): (2-3).

[0029] As a preferred solution, the polyamine is at least one of diethylamine, triethylamine, tetramethylethylenediamine and triethylenediamine.

[0030] As a preferred solution, the polyamine is diethylamine.

[0031] As a preferred solution, the surfactant is lauryl alcohol polyoxyethylene ether.

[0032] As a preferred solution, the hydroxyl value of the lauryl alcohol polyoxyethylene ether is 50 to 200 mgKOH / g.

[0033] As a preferred solution, the hydroxyl value of the lauryl alcohol polyoxyethylene ether is 140-190 mgKOH / g.

[0034] As a preferred solution, the solvent is a combination of alcohol ether and acetone.

[0035] As a preferred solution, the mass ratio of the alcohol ether to acetone is (4-5): (1-1.5).

[0036] As a preferred solution, the alcohol ether is at least one of ethylene glycol methyl ether, ethylene glycol ethyl ether and propylene glycol methyl ether.

[0037] As a preferred solution, the alcohol ether is ethylene glycol methyl ether.

[0038] The second aspect of the present invention provides a method for preparing the above-mentioned universal water-oil adhesion promoter, which comprises the following steps: adding an acid agent, a base resin, a modified resin, and an auxiliary agent to a solvent in sequence, and stirring at 200 to 400 r / min for 1 to 2 hours to obtain the obtained product.

[0039] The present invention has the beneficial effects:

[0040] 1. The present invention provides a universal water-oil adhesion promoter, which not only has excellent adhesion promotion effect and coating mechanical property enhancement effect, but also can effectively improve the weather resistance and waterproof performance of the coating. More importantly, it can be used in both water- and oil-based coating products, reducing the specific selectivity of previous adhesion promoters for coating substrates, and has excellent applicability in the coating industry and broad market application prospects.

[0041] 2. The present invention provides a universal water-and-oil adhesion promoter, which can greatly enhance the promoting effect of the adhesion promoter by adding a base resin, and can ensure the applicability of the promoter to both water and oil. The various free groups carried by the base resin and the modified resin can work together to produce a good cross-linking effect with the coating base, thereby improving the adhesion and bonding effect between the coating film and the substrate. On the other hand, the large number of active groups such as carboxyl groups carried by the base resin can greatly increase the cross-linking density of the polymer system after being added to the coating system, and enhance the free efficiency of the adhesion promoter itself in the system, thereby evenly acting on the coating surface, greatly increasing the content of the polymer resin on the surface, thereby having excellent surface density strength and hydrophobic properties.

[0042] 3. The present invention provides a universal water-oil adhesion promoter. The addition of modified resin can effectively enhance the effect of the adhesion promoter on improving the mechanical properties of the coating film, reduce the brittleness of the coating film and enhance the water resistance and weather resistance. The modified resin can react with the base resin and the active groups such as amino and carboxyl groups in the coating system to form an addition reaction, thereby linking to the long chain of the film-forming resin through coordination, grafting and hydrogen bonding. This multi-action connection method also greatly reduces the system selectivity of the adhesion promoter for the coating body. On the other hand, after being added to the long chain, the more complex multi-branched long chain structure can better form a dense network structure of the coating. This dense structure not only reduces the movement and migration rate and number of active molecules, but also reduces the collision probability between active molecules, thereby avoiding the probability of deterioration reactions. DETAILED DESCRIPTION

[0043] The technical solutions in the above invention contents of the present invention will be further described and demonstrated in the form of specific implementation schemes below. The following embodiments are only practical examples used to illustrate and explain the contents of the technical solutions in the specification and should not limit the scope of the claims to be protected by the present invention. All technical products based on the technical solutions described in the invention contents of the present invention should be included in the scope to be protected by the present invention.

[0044] In the following examples, unless otherwise specified, the raw materials are all commercially available products, or can be prepared by methods well known to those skilled in the art.

[0045] Example 1

[0046] Embodiment 1 The first aspect provides a universal water-oil adhesion promoter, wherein the raw materials include, by mass percentage: 8% acid agent, 32% base resin, 12% modified resin, 8% auxiliary agent, and the remainder is supplemented by solvent.

[0047] The acid agent is hypophosphorous acid.

[0048] The preparation method of the matrix resin comprises the following steps, calculated by mass: S1: adding 18 parts of glycidyl methacrylate, 5 parts of ethyl methacrylate and 1 part of benzophenone into a reaction container, irradiating with light of a wavelength of 320nm under air for reaction for 1.5 hours, filtering the hexane precipitate after the reaction, and obtaining a prepolymer monomer; S2: placing 16 parts of the prepolymer monomer into 80 parts of acetone, adding 1.2 parts of 3-aminopropyltriethoxysilane, heating to 65°C and stirring for reaction for 2 hours; S3: mixing the product of S2 with 13.5 parts of pyromellitic acid, 4 parts of malonic acid, 12 parts of hydroxymethyl bisphenol A diglycidyl ether and 0.2 parts of triphenylphosphine, heating to 70°C, and stirring in a closed manner for reaction for 13 hours to obtain the matrix resin.

[0049] The preparation method of the modified resin includes the following steps, calculated by mass: S1: 42 parts of methyl acrylate and 8 parts of alcohol ether are mixed and added into a reaction container, and after mixing evenly, 10 parts of organic anhydride are added and the temperature is raised to 55°C and kept warm for 1 to 2 hours; S2: after the insulation is completed, 6.2 parts of γ-aminopropyltriethoxysilane are added, the temperature is raised to 70°C, 21 parts of polyphosphoric acid are added and reacted for 10 hours, after the reaction is completed, 3 parts of pure water are added and the temperature is lowered to 52°C and kept warm for 1.5 hours, and the product is obtained after completion.

[0050] The methacrylate is glycidyl methacrylate; the alcohol ether is stearyl alcohol polyoxyethylene ether, which is purchased from the A-23 model product sold by Jiangsu Haian Petrochemical.

[0051] The phosphorus pentoxide content of the polyphosphoric acid is 88%; the viscosity of the polyphosphoric acid is 35000 cP, and the polyphosphoric acid is an industrial-grade product purchased from Changzhou Chuanlin Chemical Co., Ltd.

[0052] The auxiliary agent is a composition of polyamine, surfactant and defoamer, and the mass ratio of the three is 12:8:2.

[0053] The polyamine is diethylamine; the surfactant is lauryl alcohol polyoxyethylene ether, purchased from Hai'an Guoyun Chemical Industry, MOA-4, with a hydroxyl value of 155 mgKOH / g; and the defoaming agent is BYK-052.

[0054] The solvent is a composition of ethylene glycol methyl ether and acetone, and the mass ratio of the two is 4:1.

[0055] The second aspect of this embodiment provides a method for preparing the above-mentioned universal water-oil adhesion promoter, which comprises the following steps: adding an acid agent, a base resin, a modified resin, and an auxiliary agent to a solvent in sequence, and stirring at 250 r / min for 2 hours to obtain the obtained product.

[0056] Example 2

[0057] Example 2 The first aspect provides a universal water-oil adhesion promoter, in which the raw materials include, by mass percentage: 10% acid agent, 35% base resin, 15% modified resin, 6% auxiliary agent, and the remainder is made up of solvent.

[0058] The acid agent is hypophosphorous acid.

[0059] The preparation method of the matrix resin comprises the following steps, calculated by mass: S1: adding 18 parts of glycidyl methacrylate, 5 parts of ethyl methacrylate and 1 part of benzophenone into a reaction container, irradiating with light of wavelength 320nm under air for reaction for 1.5 hours, filtering the hexane precipitate after the reaction, and obtaining a prepolymer monomer; S2: placing 16 parts of the prepolymer monomer into 80 parts of acetone, adding 1.2 parts of 3-aminopropyltriethoxysilane, heating to 65°C and stirring for reaction for 2 hours; S3: mixing the product of S2 with 13.5 parts of pyromellitic acid, 4 parts of malonic acid, 12 parts of hydroxymethyl bisphenol A diglycidyl ether and 0.2 parts of triphenylphosphine, heating to 70°C, and stirring in a closed manner for reaction for 13 hours to obtain the matrix resin.

[0060] The preparation method of the modified resin includes the following steps, calculated by mass: S1: 42 parts of methyl acrylate and 8 parts of alcohol ether are mixed and added into a reaction container, and after mixing evenly, 10 parts of organic anhydride are added and the temperature is raised to 55°C and kept warm for 1 to 2 hours; S2: after the insulation is completed, 6.2 parts of γ-aminopropyltriethoxysilane are added, the temperature is raised to 70°C, 21 parts of polyphosphoric acid are added and reacted for 10 hours, after the reaction is completed, 3 parts of pure water are added and the temperature is lowered to 52°C and kept warm for 1.5 hours, and the product is obtained after completion.

[0061] The methacrylate is glycidyl methacrylate; the alcohol ether is stearyl alcohol polyoxyethylene ether, which is purchased from the A-23 model product sold by Jiangsu Haian Petrochemical.

[0062] The phosphorus pentoxide content of the polyphosphoric acid is 88%; the viscosity of the polyphosphoric acid is 35000 cP, and the polyphosphoric acid is an industrial-grade product purchased from Changzhou Chuanlin Chemical Co., Ltd.

[0063] The auxiliary agent is a composition of polyamine, surfactant and defoamer, and the mass ratio of the three is 12:8:2.

[0064] The polyamine is diethylamine; the surfactant is lauryl alcohol polyoxyethylene ether, purchased from Hai'an Guoyun Chemical Industry, MOA-4, with a hydroxyl value of 155 mgKOH / g; and the defoaming agent is BYK-052.

[0065] The solvent is a composition of ethylene glycol methyl ether and acetone, and the mass ratio of the two is 4:1.

[0066] The second aspect of this embodiment provides a method for preparing the above-mentioned universal water-oil adhesion promoter, which comprises the following steps: adding an acid agent, a base resin, a modified resin, and an auxiliary agent to a solvent in sequence, and stirring at 250 r / min for 2 hours to obtain the obtained product.

[0067] Comparative Example 1

[0068] The specific implementation of this comparative example is basically the same as that of Example 1, except that: the preparation method of the base resin comprises the following steps, calculated by mass: S1: 18 parts of glycidyl methacrylate, 5 parts of ethyl methacrylate and 1 part of benzophenone are added into a reaction container and irradiated with light of a wavelength of 320 nm under air for 1.5 hours. After the reaction, the hexane precipitate is filtered to obtain a prepolymer monomer; S2: 16 parts of the prepolymer monomer are mixed with 13.5 parts of pyromellitic acid, 4 parts of malonic acid, 12 parts of hydroxymethyl bisphenol A diglycidyl ether and 0.2 parts of triphenylphosphine, heated to 70°C, and reacted in a closed manner with stirring for 13 hours to obtain the product.

[0069] Comparative Example 2

[0070] The specific implementation of this comparative example is basically the same as that of Example 1, except that: the preparation method of the base resin comprises the following steps, calculated by mass: S1: 35 parts of glycidyl methacrylate, 5 parts of ethyl methacrylate and 1 part of benzophenone are added into a reaction container and irradiated with light of a wavelength of 320 nm under air for 1.5 hours. After the reaction, the hexane precipitate is filtered to obtain a prepolymer monomer; S2: 20 parts of the prepolymer monomer are placed into 80 parts of acetone, 0.6 parts of 3-aminopropyltriethoxysilane are added, and the temperature is raised to 65°C and stirred for reaction for 2 hours; S3: the product of S2 is mixed with 13.5 parts of pyromellitic acid, 4 parts of malonic acid, 12 parts of hydroxymethyl bisphenol A diglycidyl ether and 0.2 parts of triphenylphosphine, and the temperature is raised to 70°C and stirred in a closed manner for reaction for 13 hours to obtain the product.

[0071] Comparative Example 3

[0072] The specific implementation of this comparative example is basically the same as that of Example 1, except that: the preparation method of the modified resin comprises the following steps, calculated by mass: S1: 20 parts of methacrylate and 8 parts of alcohol ether are mixed and added to a reaction container, and after mixing evenly, 10 parts of organic anhydride are added and the temperature is raised to 55°C and kept warm for 1 to 2 hours; S2: after the insulation is completed, 6.2 parts of γ-aminopropyltriethoxysilane are added, the temperature is raised to 70°C, 24 parts of polyphosphoric acid are added and reacted for 10 hours, after the reaction is completed, 3 parts of pure water are added and the temperature is lowered to 52°C and kept warm for 1.5 hours, and the product is obtained after completion.

[0073] Comparative Example 4

[0074] The specific implementation of this comparative example is basically the same as that of Example 1, except that the methacrylate is ethyl methacrylate and the alcohol ether is isomeric 13-alcohol ether.

[0075] Comparative Example 5

[0076] The specific implementation of this comparative example is basically the same as that of Example 1, except that the phosphorus pentoxide content of the polyphosphoric acid is 84%; the viscosity of the polyphosphoric acid is 30,000 cP, and the industrial-grade product purchased from Ruiyang Chemical Co., Ltd.

[0077] Comparative Example 6

[0078] The specific implementation method of this comparative example is basically the same as that of Example 1, except that the auxiliary agent is a composition of polyamine, surfactant and defoamer, and the mass ratio of the three is 4:15:1; the surfactant is cetearyl alcohol polyoxyethylene ether, O-9 purchased from Hai'an Guoyun Chemical, and the hydroxyl value is 86 mgKOH / g.

[0079] Performance Evaluation

[0080] A coating was prepared by uniformly mixing, in parts by mass, 55 parts of acrylic resin 1206, 10 parts of the adhesion promoter of the present invention, 0.8 parts of DP101 dispersant, 0.3 parts of BYK-052 defoamer, 0.2 parts of BYK-333 leveling agent and 3 parts of xylene, and controlling the average fineness to be 15 μm. The coating was sprayed on a stainless steel plate and the coating thickness was controlled to be 100 μm. A control group was set, and the adhesion promoter in the control group was BASF Loxanol MI 6730.

[0081] Adhesion test: The adhesion of the coating samples containing the adhesion promoters obtained in the embodiments and comparative examples and the control group was tested with reference to GB / T1720-1979, and the measured results are recorded in Table 1.

[0082] Impact strength: The impact strength of the coating samples containing the adhesion promoters obtained in the embodiments and comparative examples and the control group were tested with reference to GB / T1732-1993. The average value of 10 tests was recorded in Table 1.

[0083] Boiling resistance: After the coating samples containing the adhesion promoters obtained in the embodiments and comparative examples and the control group were boiled in wastewater at 100°C for 6 hours, the adhesion strength was tested again and recorded. The results are recorded in Table 1.

[0084] Table 1 Performance evaluation

[0085] Example Adhesion grade Impact strength (kg cm) Boiling resistance Example 1 Level 1 54 Level 1 Example 2 Level 1 52 Level 1 Comparative Example 1 Level 1 44 Level 2 Comparative Example 2 Level 2 46 Level 2 Comparative Example 3 Level 2 47 Level 2 Comparative Example 4 Level 1 48 Level 1 Comparative Example 5 Level 1 43 Level 1 Comparative Example 6 Level 1 44 Level 2 Control group Level 1 49 Level 2

[0086] It can be seen from the data results of the embodiments and comparative examples of the present invention and Table 1 that embodiments 1 and 2 using the specific technical solution of the present invention are significantly superior to the control group and comparative examples 1 to 6 in terms of adhesion strength, impact strength and water resistance. This is mainly because the specific combination of the base resin and the modified resin used in the present invention can work together to react with the active groups such as amino and carboxyl groups in the coating system to form an addition reaction, thereby linking to the long chain of the film-forming resin through coordination, grafting and hydrogen bonding. This multi-action connection method also greatly reduces the system selectivity of the adhesion promoter for the coating body; on the other hand, after being added to the long chain, the more complex multi-branched long chain structure can better form a dense network structure of the coating. This dense structure not only reduces the movement and migration rate and number of active molecules, but also reduces the collision probability between active molecules, thereby avoiding the probability of deterioration reactions and improving various performances.

Claims

1. A universal water-oil adhesion promoter, characterized in that: In terms of mass percentage, the raw materials include: 5-10% of acid agent, 25-35% of base resin, 10-15% of modified resin, 5-10% of auxiliary agent, and the balance of solvent. The acid agent is at least one of phosphoric acid, acetic acid, hydrochloric acid and hypophosphorous acid; The preparation method of the matrix resin comprises the following steps: S1: adding glycidyl methacrylate, ethyl methacrylate and benzophenone into a reaction container and irradiating the reaction under air for 1 to 2 hours, filtering the precipitate after the reaction is completed, and obtaining a prepolymer monomer; S2: placing the prepolymer monomer into acetone, adding 3-aminopropyltriethoxysilane, heating the mixture to 60 to 65° C. and stirring the mixture for 1 to 2 hours; S3: mixing the product of S2 with pyromellitic acid, malonic acid, hydroxymethyl bisphenol A diglycidyl ether and triphenylphosphine, heating the mixture to 60 to 80° C. and stirring the mixture in a sealed manner for 10 to 14 hours, and obtaining the matrix resin; The mass ratio of glycidyl methacrylate, ethyl methacrylate and benzophenone is (15-20):(4-6):(0.5-1.5); The mass ratio of the prepolymer monomer to 3-aminopropyltriethoxysilane is (15-20): (1-1.5); The mass ratio of pyromellitic acid, malonic acid, hydroxymethyl bisphenol A diglycidyl ether and triphenylphosphine is (12-14): (3-5): (10-15): (0.1-0.2); The preparation method of the modified resin comprises the following steps: S1: adding methacrylate and alcohol ether to a reaction container, adding organic anhydride after mixing evenly, and heating to 50-60° C. and keeping warm for 1-2 hours; S2: after the insulation is completed, adding γ-aminopropyltriethoxysilane, heating to 65-80° C., adding polyphosphoric acid to react for 6-12 hours, adding pure water after the reaction is completed, cooling to 50-55° C. and keeping warm for 1-2 hours, and obtaining the modified resin after the reaction is completed; The methacrylate is at least one of glycidyl methacrylate, isobutyl methacrylate, and hydroxypropyl methacrylate; The alcohol ether is at least one of stearyl alcohol polyoxyethylene ether, cetyl alcohol polyoxyethylene ether, and isomeric tetradecanol ether; The mass ratio of the methacrylate to the alcohol ether is (40-45):(5-10); The auxiliary agent is a composition of a polyamine, a surfactant and a defoamer; the mass ratio of the polyamine, the surfactant and the defoamer is (10-15): (5-10): (1-3); The surfactant is lauryl alcohol polyoxyethylene ether.

2. The water-oil universal adhesion promoter according to claim 1, characterized in that: The added amount of the polyphosphoric acid is 30-50% of the total mass of the methacrylate and the alcohol ether.

3. The water-oil universal adhesion promoter according to claim 2, characterized in that: The phosphorus pentoxide content of the polyphosphoric acid is 88%; the viscosity of the polyphosphoric acid is 34000-38000 cP.

4. The water-oil universal adhesion promoter according to claim 1, characterized in that: The hydroxyl value of the lauryl alcohol polyoxyethylene ether is 50 to 200 mgKOH / g.

5. The water-oil universal adhesion promoter according to claim 1, characterized in that: The solvent is a composition of alcohol ether and acetone; the mass ratio of the alcohol ether to acetone is (4-5): (1-1.5).

6. A method for preparing the water-oil universal adhesion promoter according to any one of claims 1 to 5, characterized in that: The preparation method comprises the following steps: adding an acid agent, a base resin, a modified resin and an auxiliary agent into a solvent in sequence, stirring at 200 to 400 r / min for 1 to 2 hours, and obtaining the product.