Water-based two-component photocureable coating as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of coatings, and discloses a water-based bi-component photocureable coating as well as a preparation method and application thereof. The water-based bi-component photocureable coating is prepared from the following raw materials: an acrylic monomer, an acrylate monomer, an initiator, an isocyanate monomer, hydroxyl vinyl ether, a bio-based material, a hydrophilic modifier, epoxy resin, an acrylamide monomer and a neutralizer. In the preparation raw materials, the bio-based material is vegetable oil containing more than three epoxy groups, and the epoxy resin is epoxy resin containing more than three epoxy groups; a double-bond-containing component of the water-based two-component photocureable coating is a polyacrylate dispersion containing vinyl ether double bonds and acrylamide double bonds, and an epoxy group-containing component of the water-based two-component photocureable coating is hydrophilic modified epoxy resin. A paint film of the water-based bi-component photocureable coating has the characteristics of high flexibility, good chemical resistance, excellent adhesion to various substrates and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of coatings, and particularly relates to a water-based two-component light-curing coating and a preparation method and application thereof. Background Art

[0002] Waterborne coatings mainly include waterborne single-component coatings, waterborne polyurethane two-component coatings, and waterborne photocurable coatings that have developed rapidly in recent years. The film properties of single-component waterborne coatings, such as water resistance, chemical resistance and hardness, are quite different from those of solvent-based coatings, which seriously limits the promotion and application of waterborne coatings. The mechanical properties, water resistance and chemical resistance of waterborne polyurethane two-component coatings are close to those of solvent-based coatings, but due to the problem of activation period, they are not suitable for reciprocating mechanical spraying and electrostatic spraying, and their drying speed is slow, which affects the construction efficiency. The mechanical properties, water resistance and chemical resistance of waterborne photocurable coatings are better than those of solvent-based products. There is no activation period, which makes them suitable for various mechanical spraying. After construction, they are dried for 0.5 to 2 hours and cured by UV curing machine before they can be packaged off the line. The main component of waterborne photocurable coatings is waterborne photocurable resin. At present, the main products on the market are free radical photocurable polyurethane dispersions, which are mainly obtained by capping polyurethane prepolymers with hydroxyl-containing acrylic monomers. The end-capping process limits the molecular weight of the prepolymer, and the double bonds are only at the two ends of the polymer. This process characteristic causes the products on the market to have problems such as poor storage stability and low reactivity. In addition, the paint film shrinkage rate of free radical photocuring is large and the adhesion to many substrates is poor. The above shortcomings have greatly limited the promotion and application of water-based photocuring coatings.

[0003] Therefore, it is necessary to develop water-based photocurable resins with good storage stability and good adhesion to a variety of substrates. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the above-mentioned prior art. To this end, the present invention provides a water-based two-component light-curing coating and a preparation method and application thereof. The paint film of the water-based two-component light-curing coating has the advantages of high gloss, high transparency, excellent water resistance and chemical resistance, high cross-linking density, high flexibility and excellent adhesion to various substrates, and can be applied to high-grade wood coatings, automotive coatings, metal anticorrosive coatings and other industrial protective coatings.

[0005] The invention also provides a water-based two-component light-curing coating.

[0006] The present invention also provides an application of a water-based two-component light-curing coating in the fields of wood product preparation, automobile manufacturing or metal product corrosion protection.

[0007] The first aspect of the present invention provides a method for preparing a water-based two-component photocurable coating, wherein the raw materials for preparing the water-based two-component photocurable coating include: a cationic photocurable polyacrylate dispersion containing a double bond component and a hydrophilic modified epoxy resin containing an epoxy group component;

[0008] The preparation method of the cationic light-curable polyacrylate dispersion containing double bond components comprises:

[0009] A1. The acrylic acid monomer, the acrylate monomer, the vinyl monomer, and the initiator are uniformly mixed to form a mixed solution A;

[0010] A2. reacting diisocyanate and hydroxy vinyl ether to obtain a prepolymer B containing a vinyl group and an isocyanate group;

[0011] A3. reacting the bio-based material and the hydrophilic modifier to obtain a hydrophilic modified bio-based material C;

[0012] A4. The blocked cationic thermal initiator, the cationic photoinitiator, and the free radical photoinitiator are mixed to form a mixture D;

[0013] A5. The hydrophilic modified bio-based material C, the mixed solution A, the polymerization inhibitor, the acrylamide monomer, the prepolymer B containing vinyl and isocyanate groups, the mixture D, and the neutralizer are mixed, dispersed, and filtered to obtain a cationic light-curable polyacrylate dispersion containing a double bond component;

[0014] The preparation method of the hydrophilic modified epoxy resin containing epoxy group component comprises:

[0015] B1. Mixing epoxy resin, hydrophilic modifier and neutralizer to form hydrophilic modified epoxy resin containing epoxy group component.

[0016] The embodiments according to the first aspect of the present invention have at least the following beneficial effects:

[0017] The present invention introduces a cationic photocuring system and an epoxy group, reduces the shrinkage rate of the paint film, and improves the adhesion of the paint film to various substrates; the cationic photocuring polyacrylate dispersion containing a double bond component and the hydrophilic modified epoxy resin containing an epoxy group are packaged separately, which not only ensures the storage stability of the photocuring coating, but also can adjust the addition ratio of the epoxy group-containing component according to performance requirements during use.

[0018] The present invention disperses a blocked cationic thermal initiator, a cationic photoinitiator and a photocurable polyacrylate resin together. Since this component does not contain a highly active epoxy group, this part of the initiator can make the photocurable groups inside the latex particles react more fully under the premise of ensuring storage stability. The initiator added during the preparation of the coating can induce the polymerization of the photocurable groups at the interface of the latex particles, which can further increase the reaction degree of the photocurable groups, thereby improving the resistance of the paint film. The addition of the blocked cationic thermal initiator can provide another curing method for the paint film curing while ensuring storage stability.

[0019] In some embodiments of the present invention, the method for preparing the cationic light-curable polyacrylate dispersion containing double bond components comprises:

[0020] A1. In parts by mass, 1.5 to 2.5 parts of acrylic acid monomer, 20 to 30 parts of acrylate monomer, 5 to 11 parts of vinyl monomer and 0.4 to 0.6 parts of initiator are mixed to form a mixed solution A;

[0021] A2. In parts by mass, 18 to 30 parts of diisocyanate and 12 to 20 parts of hydroxy vinyl ether are reacted to obtain a prepolymer B containing a vinyl group and an isocyanate group;

[0022] A3. By weight, 18 to 26 parts of a bio-based material and 5 to 6 parts of a hydrophilic modifier are reacted to obtain a hydrophilic modified bio-based material C;

[0023] A4. In parts by mass, 0.3 to 0.5 parts of a blocked cationic thermal initiator, 0.3 to 0.6 parts of a cationic photoinitiator and 0.3 to 0.5 parts of a free radical photoinitiator are mixed to form a mixture D;

[0024] A5. By weight, the hydrophilic modified bio-based material C, the mixed solution A, the polymerization inhibitor, 6 to 10 parts of acrylamide monomer, the prepolymer B containing vinyl and isocyanate groups, the mixture D, and the neutralizer are mixed, dispersed, and filtered to obtain a cationic light-curable polyacrylate dispersion containing a double bond component;

[0025] The preparation method of the hydrophilic modified epoxy resin containing epoxy group component comprises:

[0026] B1. By weight, 12 to 20 parts of epoxy resin, 8 to 15 parts of hydrophilic modifier and neutralizer are mixed and reacted to form a hydrophilic modified epoxy resin containing an epoxy group component.

[0027] In some embodiments of the present invention, the molar ratio of the hydrophilic modifier to the neutralizer is 1:0.7 to 0.9.

[0028] In some embodiments of the present invention, the method for preparing the cationic light-curable polyacrylate dispersion containing double bond components comprises:

[0029] A1. In parts by mass, 1.5 to 2.5 parts of acrylic acid monomer, 20 to 30 parts of acrylate monomer, 5 to 11 parts of vinyl monomer, and 0.4 to 0.6 parts of initiator are mixed to form a mixed solution A;

[0030] A2. When 18 to 30 parts of diisocyanate are heated to 50 to 70°C, 12 to 20 parts of hydroxy vinyl ether are added dropwise at a constant pressure within 15 to 30 minutes, and the reaction is continued for 0.8 to 1.5 hours to obtain a prepolymer B containing vinyl and isocyanate groups;

[0031] A3. In a four-necked flask equipped with a thermometer, a condenser and a stirring paddle, 18 to 26 parts of a bio-based material are added, stirred and heated to 55 to 75°C, 5 to 6 parts of a hydrophilic modifier are added, and the reaction is carried out for 30 to 90 minutes to obtain a hydrophilic modified bio-based material C;

[0032] A4. In parts by mass, 0.3 to 0.5 parts of a blocked cationic thermal initiator, 0.3 to 0.6 parts of a cationic photoinitiator and 0.3 to 0.5 parts of a free radical photoinitiator are mixed to form a mixture D;

[0033] A5. In terms of mass fractions, the hydrophilic modified bio-based material C1 is heated to 130-150°C and then dripped into the mixed solution A at a constant pressure within 3-4 hours. After dripping, the mixture is stirred and kept warm for 20-40 minutes, cooled to 60-80°C, 0.01 parts of polymerization inhibitor are added, 6-10 parts of acrylamide monomer are added, the reaction is continued for 30-60 minutes, the temperature is cooled to 45-55°C, the prepolymer B is added, the reaction is continued for 30-40 minutes, the mixture D is added, 2-3.5 parts of neutralizer are added after stirring for 5-10 minutes, 135-180 parts of deionized water are added after stirring for 3-5 minutes, and the mixture is dispersed at high speed for 10-20 minutes. The material is filtered to obtain a cationic light-curable polyacrylate dispersion containing a double bond component;

[0034] The preparation method of the hydrophilic modified epoxy resin containing epoxy group component comprises:

[0035] B1. By weight, 12 to 20 parts of epoxy resin and 8 to 15 parts of hydrophilic modifier are mixed, the reaction temperature is controlled to be 40 to 45°C, the reaction is carried out for 1 to 2 hours, 3 to 5 parts of neutralizing agent are added and stirred for 3 to 5 minutes to form a hydrophilic modified epoxy resin containing an epoxy group component.

[0036] In some embodiments of the present invention, the bio-based material contains three or more epoxy groups. The preferred bio-based material of the present invention contains three or more epoxy groups, which can ensure that one hydrophilic modifier and no less than one double bond-containing monomer can be grafted onto each bio-based material.

[0037] In the present invention, the groups that can participate in photocuring include vinyl ether double bonds, acryloyloxy double bonds and epoxy groups. Free radical photoinitiators can initiate polymerization of acryloyloxy double bonds, and cationic photoinitiators can initiate polymerization of vinyl ether double bonds and epoxy groups. When the two types of photoinitiators are added at the same time, the above groups can copolymerize. The polymerization shrinkage rate initiated by free radical photoinitiators is large, oxygen inhibition is obvious, and the adhesion to many substrates is poor, while the polymerization shrinkage rate initiated by cationic photoinitiators is small, there is no oxygen inhibition, and its epoxy group has excellent adhesion to a variety of substrates, which can fully make up for the shortcomings of free radical photocuring.

[0038] In addition, conventional water-based photocurable coatings only add photoinitiators during the coating preparation stage, and this method has the disadvantage that the photocurable groups inside the latex particles cannot fully react. The present invention disperses a blocked cationic thermal initiator, a cationic photoinitiator, a free radical polymerization photoinitiator and a photocurable polyacrylate resin together. Since this component does not contain a highly active epoxy group, this part of the initiator can make the photocurable groups inside the latex particles react more fully under the premise of ensuring storage stability. The initiator added during coating preparation can initiate polymerization of the photocurable groups at the interface of the latex particles, which can further improve the reaction degree of the photocurable groups, thereby improving the resistance of the paint film.

[0039] Third, the addition of a blocked cationic thermal initiator can provide another curing method for the paint film while ensuring storage stability. When the water-based light-curing paint is a solid color paint, ultraviolet rays cannot penetrate the paint film, resulting in the failure of the bottom layer of the paint film to cure. The paint film with a blocked cationic thermal initiator can cure the bottom layer of the paint film after baking. Some woods have a high oil content, such as pine. When baked, the oil will come out of the base material, causing defects such as blistering in the paint film. Since this type of oil contains double bonds and epoxy groups, the blocked cationic thermal initiator can cause the oil to cure during baking, thereby avoiding paint film defects.

[0040] In some embodiments of the present invention, the acrylic acid monomer includes at least one of acrylic acid AA and methacrylic acid MAA.

[0041] In some embodiments of the present invention, the acrylate monomer includes a methacrylate monomer, and the methacrylate monomer includes at least one of methyl methacrylate MMA, butyl acrylate BA, isobornyl acrylate IBOA, cyclohexyl methacrylate CHMA, and benzyl methacrylate BNMA.

[0042] In some embodiments of the present invention, the vinyl monomer includes at least one of styrene St and vinyl acetate VAc.

[0043] In some embodiments of the present invention, the initiator includes at least one of di-tert-amyl peroxide DTAP and di-tert-butyl peroxide DTBP.

[0044] In some embodiments of the present invention, the diisocyanate monomer includes at least one of isophorone diisocyanate IPDI, toluene diisocyanate TDI, hexamethylene diisocyanate HDI, diphenylmethane diisocyanate MDI and 4,4'-dicyclohexylmethane diisocyanate HMDI.

[0045] In some embodiments of the present invention, the hydroxy vinyl ether includes at least one of 4-hydroxybutyl vinyl ether HBVE, triethylene glycol divinyl ether DVE, and cyclohexyl-1,4-dimethanol monovinyl ether.

[0046] In some embodiments of the present invention, the bio-based material includes epoxy soybean oil GreenSoft D, special epoxy soybean oil GreenSoft H and epoxy linseed oil ELO 9-5 TM At least one of .

[0047] In some embodiments of the present invention, the hydrophilic modifier includes at least one of cyclohexylaminoethanesulfonic acid CHES, cyclohexylaminopropanesulfonic acid CAPS and cyclohexylaminobutanesulfonic acid CABS.

[0048] In some embodiments of the present invention, the blocked cationic thermal initiator includes at least one of CTI-100, CTI-200, CTI-300 and Vicbase TC3631.

[0049] In some embodiments of the present invention, the cationic photoinitiator includes at least one of HRcure-9387, HRcure-9392, HRcure-9388, HRcure-262, HRcure-261, HRcure-6992, HRcure-6976 and Omnirad250.

[0050] In some embodiments of the present invention, the acrylamide-based monomer includes at least one of diacetone acrylamide (DAAM), N-butoxymethyl acrylamide and hydroxyethyl acrylamide.

[0051] In some embodiments of the present invention, the neutralizing agent includes at least one of triethylamine TEA, N,N-dimethylethanolamine DMEA and N,N-dimethylcyclohexylamine DMCHA.

[0052] In some embodiments of the present invention, the epoxy resin includes at least one of tetraglycidyl diaminodimethylenebenzene MF-4101, diglycidyl 4,5-epoxytetrahydrophthalate MF-3286, and triglycidyl-p-aminophenol MF-3102.

[0053] In some embodiments of the present invention, the cationic light-curable polyacrylate dispersion containing double bond components has a bio-based content of ≥10%; a pH of 6.5-7.5; a particle size of <110 nm; and a solid content of 38-41%.

[0054] The beneficial effects of the present invention are as follows: the prepared cationic light-cured polyacrylate dispersion has the characteristics of high bio-based content, good storage stability, good appearance, high reactivity, good resistance, excellent adhesion to various substrates, etc.; the prepared hydrophilic modified epoxy resin has the characteristics of being water-dispersible and having high reactivity, etc.

[0055] In some embodiments of the present invention, the preparation method comprises the following steps:

[0056] The cationic light-curing polyacrylate dispersion containing double bonds is dispersed and then mixed with the hydrophilic modified epoxy resin in a ratio of 100:(5-15) to obtain a water-based two-component light-curing coating.

[0057] In some embodiments of the present invention, the raw materials for preparing the bio-based material include plant oil containing three or more epoxy groups;

[0058] The hydrophilic modifier includes a monomer containing a secondary amino group and a sulfonic acid group;

[0059] The epoxy resin includes an epoxy resin containing three or more epoxy groups.

[0060] In some embodiments of the present invention, the neutralizing agent comprises a tertiary amine neutralizing agent.

[0061] In some embodiments of the present invention, the hydroxy vinyl ether includes at least one of 4-hydroxybutyl vinyl ether, triethylene glycol divinyl ether, and cyclohexyl-1,4-dimethanol monovinyl ether.

[0062] In some embodiments of the present invention, the epoxy resin includes at least one of tetraglycidyldiaminodimethylenebenzene, diglycidyl 4,5-epoxytetrahydrophthalate, and triglycidyl-p-aminophenol.

[0063] In some embodiments of the present invention, the raw materials for preparing the water-based two-component light-curing coating further include additives, and the additives include: film-forming additives, dispersants, titanium dioxide, defoamers, thickeners and wetting agents.

[0064] In some embodiments of the present invention, the raw materials for preparing the water-based two-component photocurable coating include: cationic photocurable polyacrylate dispersion, free radical photoinitiator, cationic photoinitiator, water, film-forming aid, dispersant, titanium dioxide, defoamer, thickener and wetting agent.

[0065] In some embodiments of the present invention, the free radical photoinitiator includes at least one of Darocur 1173, Irgacure 2959, Irgacure 500, Lucirin TPO-L, and Irgacure 819-DW.

[0066] In some embodiments of the present invention, the cationic photoinitiator includes at least one of HRcure-9387, HRcure-9392, HRcure-9388, HRcure-262, HRcure-261, HRcure-6992, HRcure-6976 and Omnirad250.

[0067] In some embodiments of the present invention, the film-forming aid includes at least one of propylene glycol methyl ether PM, propylene glycol butyl ether PnB, dipropylene glycol methyl ether DPM and dipropylene glycol butyl ether DPnB.

[0068] In some embodiments of the present invention, the dispersant includes at least one of DISPERBYK-191 and DISPERS 755W.

[0069] In some embodiments of the present invention, the titanium dioxide includes at least one of NTR-606 and Ti-Pure R-902+.

[0070] In some embodiments of the present invention, the defoamer includes at least one of polyether siloxane copolymer defoamers TEGO-800, TEGO-805, TEGO-815, TEGO-825, and modified polysiloxane copolymer solutions BYK-019 and BYK-020.

[0071] In some embodiments of the present invention, the thickener includes at least one of a nonionic polyurethane associative thickener RM-8W, a hydrophobically modified alkali-swellable associative thickener TT-935, an alkali-swellable non-associative thickener ASE-60, and nonionic associative thickeners TEGO ViscoPlus 3000, TEGO ViscoPlus 3030, and TEGO ViscoPlus 3060.

[0072] In some embodiments of the present invention, the wetting agent includes at least one of polyether siloxane copolymer TEGO-245, nonionic organic surfactant TEGO-500, and polyether modified polysiloxane solution BYK-346.

[0073] In some embodiments of the present invention, the raw materials for preparing the water-based two-component light-curing coating include, by weight:

[0074] 50-70 parts of cationic light-curable polyacrylate dispersion;

[0075] 1-3 parts of free radical photoinitiator;

[0076] Cationic photoinitiator 0.5-1.5 parts;

[0077] 10-30 parts water;

[0078] 2-4 parts of film-forming aid;

[0079] Dispersant 0.3-1.0 part;

[0080] 10-20 parts of titanium dioxide;

[0081] Defoaming agent 0.05-0.2 parts;

[0082] Thickener 0.5-0.8 parts;

[0083] Wetting agent 0.05-0.2 parts.

[0084] In some embodiments of the present invention, the method for preparing the double bond-containing component of the water-based two-component photocurable coating comprises the following steps:

[0085] After premixing water and film-forming aid into cationic photocurable polyacrylate dispersion, photoinitiator, dispersant, titanium dioxide, defoamer, thickener and wetting agent are added in sequence, dispersed for 10-30 minutes, filtered to obtain the double bond-containing component of the water-based two-component photocurable coating, and the double bond-containing component and hydrophilic modified epoxy resin are uniformly mixed in a ratio of 100:(5-10) to obtain the water-based two-component photocurable coating.

[0086] Here, it is the ratio of the double bond-containing component to the hydrophilic modified epoxy resin, wherein the double bond-containing component includes a double bond-containing cationic light-curing polyacrylate dispersion and other additives.

[0087] The second aspect of the present invention provides a water-based two-component photocurable coating, which is prepared by the preparation method.

[0088] The third aspect of the present invention provides an application of the water-based two-component light-curing coating in the fields of wood product preparation, automobile manufacturing or metal product corrosion protection.

[0089] The paint film of the water-based two-component photocurable paint obtained by the present invention has the advantages of high gloss, high transparency, excellent water resistance and chemical resistance, high crosslinking density, good flexibility, excellent adhesion to various substrates, etc., and can be applied to high-end wood coatings, automotive coatings, metal anticorrosive coatings and other industrial protective coatings. DETAILED DESCRIPTION

[0090] In order to make the technical scheme of the present invention more clearly understood by those skilled in the art, the following embodiments are listed for illustration. It should be pointed out that the following embodiments do not limit the protection scope of the present invention.

[0091] Unless otherwise specified, the raw materials, reagents or devices used in the following examples can be obtained from conventional commercial sources or by existing known methods.

[0092] The following examples are further limited in that the acrylic acid monomer is acrylic acid AA or methacrylic acid MAA from Sanmu Company;

[0093] The methacrylate monomers are methyl methacrylate MMA, butyl acrylate BA, isobornyl acrylate IBOA, cyclohexyl methacrylate CHMA and / or benzyl methacrylate BNMA from Sanmu Company;

[0094] The vinyl monomers are styrene St and vinyl acetate VAc from Sanmu Company;

[0095] The initiator is di-tert-amyl peroxide DTAP or di-tert-butyl peroxide DTBP from Jinjinle Company;

[0096] The diisocyanate monomers are isophorone diisocyanate IPDI, toluene diisocyanate TDI, hexamethylene diisocyanate HDI, diphenylmethane diisocyanate MDI, and 4,4'-dicyclohexylmethane diisocyanate HMDI produced by Wanhua Company;

[0097] The bio-based materials are special epoxy soybean oil GreenSoft D, special epoxy soybean oil GreenSoft H, and epoxy linseed oil ELO from Xingbang Polymer Materials Co., Ltd. 9-5 TM a kind of;

[0098] The hydrophilic modifier is one of cyclohexylaminoethanesulfonic acid CHES, cyclohexylaminopropanesulfonic acid CAPS or cyclohexylaminobutanesulfonic acid CABS of Aladdin Company;

[0099] The blocked cationic thermal initiator is one of CTI-100, CTI-200, CTI-300 of Shenzhen Youyang Company or Vicbase TC3631 of Shenzhen Keyi Applied Materials Co., Ltd.;

[0100] The cationic photoinitiator is one or more of HRcure-9387, HRcure-9392, HRcure-9388, HRcure-262, HRcure-261, HRcure-6992, HRcure-6976 of Huiren Hengtong Company or Omnirad250 of IGM Company;

[0101] It is further defined that the acrylamide-based monomer is one of diacetone acrylamide DAAM, N-butoxymethyl acrylamide or hydroxyethyl acrylamide;

[0102] It is further defined that the neutralizing agent is triethylamine TEA, N,N-dimethylethanolamine DMEA or N,N-dimethylcyclohexylamine DMCHA from Dow Chemical Company;

[0103] It is further defined that the epoxy resin is one of tetraglycidyl diaminodimethylenebenzene MF-4101, 4,5-epoxytetrahydrophthalic acid diglycidyl ester MF-3286, and triglycidyl-p-aminophenol MF-3102 produced by Hubei Zhenzhengfeng New Materials Co., Ltd.

[0104] Example 1

[0105] A two-component light-curing coating 1:

[0106] The cationic light-curable polyacrylate dispersion is prepared by the following steps:

[0107] A1. In parts by mass, in parts by mass, 1.8 parts of acrylic acid AA, 13.8 parts of methyl methacrylate MMA, 5 parts of butyl acrylate BA, 4.3 parts of isobornyl acrylate IBOA, 10.7 parts of styrene St, 0.6 parts of di-tert-amyl peroxide DTAP were mixed to form a mixed solution A1 and set aside;

[0108] A2. In parts by mass, 23.9 parts of isophorone diisocyanate IPDI were heated to 50 ° C, and 14.2 parts of triethylene glycol divinyl ether DVE were added dropwise at a constant pressure within 15 minutes, and the reaction was continued for 1 hour to obtain a prepolymer containing vinyl and isocyanate groups B1 for standby use;

[0109] A3. In a four-necked flask equipped with a thermometer, a condenser and a stirring paddle, 25.2 parts of special epoxy soybean oil GreenSoft D were added, stirred and heated to 73 ° C, 5.6 parts of cyclohexylaminopropanesulfonic acid CAPS were added, and the reaction was carried out for 75 minutes to obtain a hydrophilic modified bio-based material C1 for standby use;

[0110] A4. In parts by mass, 0.4 parts of a blocked cationic thermal initiator CTI-100, 0.5 parts of a cationic photoinitiator HRcure-9387 and 0.4 parts of a free radical photoinitiator Darocur1173 were mixed to form a mixture D1 for standby use;

[0111] A5. In terms of mass fractions, when the hydrophilic modified bio-based material C1 is heated to 150°C, the mixed solution A1 is dripped into it at a constant pressure within 4 hours. After dripping, it is stirred and kept warm for 30 minutes. The temperature is lowered to 80°C, 0.01 parts of polymerization inhibitor MEHQ are added, 9.7 parts of diacetone acrylamide DAAM are added, the reaction is continued for 40 minutes, the temperature is lowered to 50°C, B1 is added, the reaction is continued for 30 minutes, D1 is added, 2.5 parts of triethylamine TEA are added after stirring for 5 minutes, 178 parts of deionized water are added after stirring for 5 minutes, and the mixture is dispersed at high speed for 10 minutes. The material is filtered to obtain a cationic light-cured polyacrylate dispersion containing double bond components, which is set aside.

[0112] The preparation method of the hydrophilic modified epoxy resin containing epoxy group component is as follows:

[0113] B1. By mass, 17.2 parts of MF-4101 and 9.0 parts of cyclohexylaminopropanesulfonic acid CAPS (0.04 mol) were mixed evenly, the reaction temperature was controlled to 40°C, the reaction was carried out for 1.5 hours, 3.3 parts of triethylamine TEA (0.033 mol) were added and stirred for 5 minutes to form a hydrophilic modified epoxy resin containing an epoxy group component, which was set aside.

[0114] Example 2

[0115] A two-component light-curing coating 2:

[0116] The cationic light-curable polyacrylate dispersion is prepared by the following steps:

[0117] A1. In parts by mass, in parts by mass, 2.2 parts of methacrylic acid MAA, 12.5 parts of methyl methacrylate MMA, 6.3 parts of butyl acrylate BA, 7.5 parts of cyclohexyl methacrylate CHMA, 7.5 parts of styrene St, 0.5 parts of di-tert-butyl peroxide DTBP were mixed to form a mixed solution A2 and set aside;

[0118] A2. In parts by mass, 28.2 parts of hydrogenated MDI were heated to 70 ° C, and 18.3 parts of 4-hydroxybutyl vinyl ether cyclohexyl-1,4-dimethanol monovinyl ether were added dropwise at a constant pressure within 30 minutes, and the reaction was continued for 1.5 hours to obtain a prepolymer containing vinyl and isocyanate groups B2, which was set aside;

[0119] A3. In a four-necked flask equipped with a thermometer, condenser and stirring paddle, add 18.5 parts of epoxy linseed oil ELO 9-5TM , stirring and heating, raising the temperature to 65° C., adding 5.9 parts of cyclohexylaminobutanesulfonic acid CABS, reacting for 90 minutes, and obtaining a hydrophilic modified bio-based material C2 for standby use;

[0120] A4. In parts by mass, 0.5 parts of a blocked cationic thermal initiator CTI-200, 0.5 parts of a cationic photoinitiator HRcure-9388 and 0.3 parts of a free radical photoinitiator Irgacure 2959 were mixed to form a mixture D2 for standby use;

[0121] A5. In terms of mass fractions, when the hydrophilic modified bio-based material C2 is heated to 145°C, the mixed solution A2 is dripped into it at a constant pressure within 4 hours. After dripping, it is stirred and kept warm for 40 minutes. The temperature is lowered to 70°C, 0.01 parts of polymerization inhibitor MEHQ is added, 6.6 parts of hydroxyethyl acrylamide are added, the reaction is continued for 50 minutes, the temperature is lowered to 55°C, B2 is added, the reaction is continued for 35 minutes, D2 is added, 2.2 parts of N,N-dimethylethanolamine DMEA are added after stirring for 7 minutes, 176 parts of deionized water are added after stirring for 5 minutes, and the dispersion is dispersed at high speed for 15 minutes. The material is filtered to obtain a cationic light-cured polyacrylate dispersion containing double bond components, which is set aside.

[0122] The preparation method of the hydrophilic modified epoxy resin containing epoxy group component is as follows:

[0123] B1. By mass, mix 15.2 parts of MF-3286 and 10.6 parts of cyclohexylaminoethanesulfonic acid CHES evenly, control the reaction temperature to 40°C, react for 2 hours, add 3.6 parts of N,N-dimethylethanolamine DMEA and stir for 3 minutes to form a hydrophilic modified epoxy resin containing epoxy components, and set aside.

[0124] Example 3

[0125] A two-component light-curing coating 3:

[0126] The cationic light-curable polyacrylate dispersion is prepared by the following steps:

[0127] A1. In parts by mass, in parts by mass, 1.8 parts of acrylic acid AA, 11.2 parts of methyl methacrylate MMA, 7.5 parts of butyl acrylate BA, 6.3 parts of Bian methacrylate BNMA, 8.7 parts of styrene St, 0.4 parts of di-tert-butyl peroxide DTBP were mixed to form a mixed solution A3 and set aside;

[0128] A2. In parts by mass, 18.1 parts of hexamethylene diisocyanate HDI were heated to 60 ° C, and 12.5 parts of 4-hydroxybutyl vinyl ether HBVE were added dropwise at a constant pressure within 25 minutes, and the reaction was continued for 1.3 hours to obtain a prepolymer containing a vinyl group and an isocyanate group B3, set aside;

[0129] A3. In a four-necked flask equipped with a thermometer, a condenser and a stirring paddle, 24.2 parts of special epoxidized soybean oil GreenSoft H were added, stirred and heated to 70 ° C, 5.2 parts of cyclohexylaminoethanesulfonic acid CHES were added, and the reaction was carried out for 60 minutes to obtain a hydrophilic modified bio-based material C3 for standby use;

[0130] A4. In parts by mass, 0.3 parts of a blocked cationic thermal initiator CTI-300, 0.6 parts of a cationic photoinitiator Omnirad250 and 0.3 parts of a free radical photoinitiator Irgacure 500 were mixed to form a mixture D3 and set aside;

[0131] A5. In terms of mass fractions, when the hydrophilic modified bio-based material C3 is heated to 140°C, the mixed solution A3 is dripped into it at a constant pressure within 4 hours. After dripping, it is stirred and kept warm for 40 minutes. The temperature is lowered to 75°C, 0.01 parts of polymerization inhibitor MEHQ is added, 9.0 parts of N-butoxymethyl acrylamide are added, the reaction is continued for 45 minutes, the temperature is lowered to 50°C, B3 is added, the reaction is continued for 30 minutes, D3 is added, 3.2 parts of N,N-dimethylcyclohexylamine DMCHA are added after stirring for 5 minutes, 164 parts of deionized water are added after stirring for 5 minutes, and the mixture is dispersed at high speed for 20 minutes. The material is filtered to obtain a cationic light-cured polyacrylate dispersion containing double bond components, which is set aside.

[0132] The preparation method of the hydrophilic modified epoxy resin containing epoxy group component is as follows:

[0133] B1. By mass, 12.4 parts of MF-3102 and 10.5 parts of cyclohexylaminobutanesulfonic acid CABS were mixed evenly, the reaction temperature was controlled to 45°C, the reaction was carried out for 1.5 hours, 4.5 parts of N,N-dimethylcyclohexylamine DMCHA were added, and the mixture was stirred for 5 minutes to form a hydrophilic modified epoxy resin containing an epoxy group component, which was set aside.

[0134] Example 4

[0135] Example A water-based two-component photocurable coating 1 was prepared. The cationic photocurable polyacrylate dispersion 1 and the hydrophilic modified epoxy resin 1 were prepared in Example 1. The specific steps were as follows:

[0136] The double bond-containing component of the water-based two-component light-curing coating is composed of the following components in parts by weight:

[0137]

[0138] The preparation method of the water-based two-component photocurable coating is as follows: adding the cationic photocurable polyacrylate dispersion 1 into a stirring kettle at a rotation speed of 700 rpm, premixing water, dipropylene glycol butyl ether and dipropylene glycol methyl ether and adding them into the stirring kettle, sequentially adding Darocur 1173, Lucirin TPO-L, Omnirad250, DISPERS 755W, titanium dioxide NTR-606, TEGO-800, RM-8W and TEGO-245, dispersing for 20 minutes, filtering to obtain the double bond-containing component of the water-based two-component photocurable coating, and uniformly mixing the double bond-containing component and the hydrophilic modified epoxy resin prepared in Example 1 at a ratio of 100:6 to obtain the water-based two-component photocurable coating 1;

[0139] The paint film prepared by the water-based two-component light-curing coating 1 was dried at 50°C for 2 hours, and the light curing machine was turned on with a mercury lamp and the UVV energy was adjusted to 600 mJ / cm 2 Curing, and baking at 100℃ for 2h after curing.

[0140] Example 5

[0141] Example A water-based two-component photocurable coating 2 was prepared. The cationic photocurable polyacrylate dispersion 2 and the hydrophilic modified epoxy resin 2 were prepared in Example 2. The specific steps were:

[0142] The double bond-containing component of the water-based two-component light-curing coating is composed of the following components in parts by weight:

[0143]

[0144]

[0145] The preparation method of the water-based two-component photocurable coating is as follows: adding the cationic photocurable polyacrylate dispersion 2 into a stirring kettle at a rotation speed of 700 rpm, premixing water, propylene glycol butyl ether and propylene glycol methyl ether and adding them into the stirring kettle, sequentially adding Irgacure 2959, Irgacure 819-DW, HRcure-6992, DISPERBYK-191, titanium dioxide Ti-PureR-902+, TEGO-805, TT-935 and BYK-346, dispersing for 20 minutes, filtering to obtain the double bond-containing component of the water-based two-component photocurable coating, and uniformly mixing the double bond-containing component and the hydrophilic modified epoxy resin prepared in Example 2 at a ratio of 100:6 to obtain the water-based two-component photocurable coating 2;

[0146] The paint film prepared by the water-based two-component light-curing coating 2 was dried at 50°C for 2 hours, and the light curing machine was turned on with a mercury lamp and the UVV energy was adjusted to 600 mJ / cm 2 Curing, and baking at 100℃ for 2h after curing.

[0147] Example 6

[0148] Example A water-based two-component photocurable coating 3 was prepared. The cationic photocurable polyacrylate dispersion 3 and the hydrophilic modified epoxy resin 3 were prepared in Example 3. The specific steps were as follows:

[0149] The double bond-containing component of the water-based two-component light-curing coating is composed of the following components in parts by weight:

[0150] 360 parts of cationic light-curable polyacrylate dispersion;

[0151]

[0152] TEGO-500 0.2 parts;

[0153] The preparation method of the water-based two-component photocurable coating is as follows: adding the cationic photocurable polyacrylate dispersion 3 into a stirring kettle at a rotation speed of 700 rpm, premixing water, dipropylene glycol butyl ether and propylene glycol methyl ether and adding them into the stirring kettle, sequentially adding Irgacure 500, Irgacure 819-DW, Omnirad250, DISPERBYK-191, titanium dioxide NTR-606, TEGO-815, TEGO ViscoPlus 3000 and TEGO-500, dispersing for 20 minutes, filtering to obtain the double bond-containing component of the water-based two-component photocurable coating, and uniformly mixing the double bond-containing component and the hydrophilic modified epoxy resin prepared in Example 3 at a ratio of 100:6 to obtain the water-based two-component photocurable coating 3;

[0154] The paint film prepared by the water-based two-component light-curing coating 3 was dried at 50°C for 2 hours, and the light curing machine was turned on with a mercury lamp and the UVV energy was adjusted to 600 mJ / cm 2 Curing, and baking at 100℃ for 2h after curing.

[0155] Comparative Example 1

[0156] A two-component light-curing coating 4:

[0157] In this comparative example, the amount of prepolymer containing vinyl and isocyanate groups is reduced by half, wherein the cationic light-curable polyacrylate dispersion is prepared by the following steps:

[0158] A1. In parts by mass, in parts by mass, 1.8 parts of acrylic acid AA, 13.8 parts of methyl methacrylate MMA, 5 parts of butyl acrylate BA, 4.3 parts of isobornyl acrylate IBOA, 10.7 parts of styrene St, 0.6 parts of di-tert-amyl peroxide DTAP were mixed to form a mixed solution A4 and set aside;

[0159] A2. In parts by mass, 11.9 parts of isophorone diisocyanate IPDI were heated to 50 ° C, and 7.1 parts of triethylene glycol divinyl ether DVE were added dropwise at a constant pressure within 15 minutes, and the reaction was continued for 1 hour to obtain a prepolymer containing a vinyl group and an isocyanate group B4, set aside;

[0160] A3. In a four-necked flask equipped with a thermometer, a condenser and a stirring paddle, 25.2 parts of special epoxy soybean oil GreenSoft D were added, stirred and heated to 73 ° C, 5.6 parts of cyclohexylaminopropanesulfonic acid CAPS were added, and the reaction was carried out for 75 minutes to obtain a hydrophilic modified bio-based material C4 for standby use;

[0161] A4. In parts by mass, 0.4 parts of a blocked cationic thermal initiator CTI-100, 0.5 parts of a cationic photoinitiator HRcure-9387 and 0.4 parts of a free radical photoinitiator Darocur1173 were mixed to form a mixture D4 for standby use;

[0162] A5. In terms of mass fractions, when the hydrophilic modified bio-based material C4 is heated to 150°C, the mixed solution A4 is dripped into it at a constant pressure within 4 hours. After dripping, it is stirred and kept warm for 30 minutes. The temperature is lowered to 80°C, 0.01 parts of polymerization inhibitor MEHQ is added, 9.7 parts of diacetone acrylamide DAAM are added, the reaction is continued for 40 minutes, the temperature is lowered to 50°C, 19 parts of B4 are added, the reaction is continued for 30 minutes, 1.3 parts of D4 are added, 2.5 parts of triethylamine TEA are added after stirring for 5 minutes, 149 parts of deionized water are added after stirring for 5 minutes, and the mixture is dispersed at high speed for 10 minutes. The material is filtered to obtain a cationic light-curing polyacrylate dispersion containing double bond components, which is set aside.

[0163] The preparation method of the hydrophilic modified epoxy resin containing epoxy group component is as follows:

[0164] B1. By mass, 17.2 parts of MF-4101 and 9 parts of cyclohexylaminopropanesulfonic acid CAPS were mixed evenly, the reaction temperature was controlled to 40°C, the reaction was carried out for 1.5 hours, 3.3 parts of triethylamine TEA were added and stirred for 5 minutes to form a hydrophilic modified epoxy resin containing an epoxy group component, which was set aside.

[0165] Comparative Example 2

[0166] A two-component light-curing coating 5:

[0167] In this comparative example, a hydrophilic modified epoxy resin and a polyacrylate prepolymer are co-dispersed, wherein a cationic light-curable polyacrylate dispersion is prepared by the following steps:

[0168] A1. In parts by mass, in parts by mass, 1.8 parts of acrylic acid AA, 13.8 parts of methyl methacrylate MMA, 5 parts of butyl acrylate BA, 4.3 parts of isobornyl acrylate IBOA, 10.7 parts of styrene St, 0.6 parts of di-tert-amyl peroxide DTAP were mixed to form a mixed solution A5 and set aside;

[0169] A2. In parts by mass, 23.9 parts of isophorone diisocyanate IPDI were heated to 50 ° C, and 14.2 parts of triethylene glycol divinyl ether DVE were added dropwise at a constant pressure within 15 minutes, and the reaction was continued for 1 hour to obtain a prepolymer containing vinyl and isocyanate groups B5, set aside;

[0170] A3. In a four-necked flask equipped with a thermometer, a condenser and a stirring paddle, 25.2 parts of special epoxy soybean oil GreenSoft D were added, stirred and heated to 73 ° C, 5.6 parts of cyclohexylaminopropanesulfonic acid CAPS were added, and the reaction was carried out for 75 minutes to obtain a hydrophilic modified bio-based material C5 for standby use;

[0171] A4. In parts by mass, 17.2 parts of MF-4101 and 9.0 parts of cyclohexylaminopropanesulfonic acid CAPS were mixed uniformly, the reaction temperature was controlled to 40 ° C, and the reaction was carried out for 1.5 hours to form a mixture D5, which was set aside;

[0172] A5. By mass, 0.4 parts of blocked cationic thermal initiator CTI-100, 0.5 parts of cationic photoinitiator HRcure-9387 and 0.4 parts of free radical photoinitiator Darocur1173 were mixed evenly to form a mixture E5 for standby use.

[0173] The preparation method of the hydrophilic modified epoxy resin containing epoxy group component is as follows:

[0174] B1. In terms of mass fractions, when the hydrophilic modified bio-based material C5 is heated to 150°C, the mixed solution A5 is dripped into it at a constant pressure within 4 hours. After the dripping is completed, the mixture is stirred and kept warm for 30 minutes, the temperature is lowered to 80°C, 0.01 parts of polymerization inhibitor MEHQ are added, 9.7 parts of diacetone acrylamide DAAM are added, the reaction is continued for 40 minutes, the temperature is lowered to 50°C, B5 is added, the reaction is continued for 30 minutes, D5 is added, E5 is added after stirring for 5 minutes, 5.8 parts of triethylamine TEA is added after stirring for 5 minutes, 222 parts of deionized water are added after stirring for 10 minutes, and the material is filtered to obtain a cationic light-curable polyacrylate dispersion for standby use.

[0175] Comparative Example 3

[0176] A two-component light-curing coating 6:

[0177] This comparative example does not add acrylamide monomer and is prepared by the following steps:

[0178] A1. In parts by mass, in parts by mass, 1.8 parts of acrylic acid AA, 13.8 parts of methyl methacrylate MMA, 5 parts of butyl acrylate BA, 4.3 parts of isobornyl acrylate IBOA, 10.7 parts of styrene St, 0.6 parts of di-tert-amyl peroxide DTAP were mixed to form a mixed solution A6 and set aside;

[0179] A2. In parts by mass, 11.1 parts of isophorone diisocyanate IPDI were heated to 50 ° C, and 6.6 parts of triethylene glycol divinyl ether DVE were added dropwise at a constant pressure within 15 minutes, and the reaction was continued for 1 hour to obtain a prepolymer containing a vinyl group and an isocyanate group B6, set aside;

[0180] A3. In a four-necked flask equipped with a thermometer, a condenser and a stirring paddle, 25.2 parts of special epoxy soybean oil GreenSoft D were added, stirred and heated to 73 ° C, 5.6 parts of cyclohexylaminopropanesulfonic acid CAPS were added, and the reaction was carried out for 75 minutes to obtain a hydrophilic modified bio-based material C6 for standby use;

[0181] A4. In parts by mass, 0.4 parts of a blocked cationic thermal initiator CTI-100, 0.5 parts of a cationic photoinitiator HRcure-9387 and 0.4 parts of a free radical photoinitiator Darocur1173 were mixed to form a mixture D6 for standby use;

[0182] A5. In terms of mass fractions, when the hydrophilic modified bio-based material C6 is heated to 150°C, the mixed liquid A6 is dripped into it at a constant pressure within 4 hours. After the dripping is completed, the mixture is stirred and kept warm for 30 minutes. The temperature is lowered to 50°C, 0.01 parts of polymerization inhibitor MEHQ is added, B6 is added, the reaction is continued for 30 minutes, D6 is added, 2.5 parts of triethylamine TEA are added after stirring for 5 minutes, 133 parts of deionized water are added after stirring for 5 minutes, and the mixture is dispersed at high speed for 10 minutes. The material is filtered to obtain a cationic light-cured polyacrylate dispersion containing double bond components, which is set aside.

[0183] The preparation method of the hydrophilic modified epoxy resin containing epoxy group component is as follows:

[0184] B1. By mass, 17.2 parts of MF-4101 and 9 parts of cyclohexylaminopropanesulfonic acid CAPS were mixed evenly, the reaction temperature was controlled to 40°C, the reaction was carried out for 1.5 hours, 3.3 parts of triethylamine TEA were added and stirred for 5 minutes to form a hydrophilic modified epoxy resin containing an epoxy group component, which was set aside.

[0185] Comparative Example 4

[0186] A two-component light-curing coating 7:

[0187] This comparative example does not add a blocked cationic thermal initiator and is prepared by the following steps:

[0188] A1. In parts by mass, in parts by mass, 1.8 parts of acrylic acid AA, 13.8 parts of methyl methacrylate MMA, 5 parts of butyl acrylate BA, 4.3 parts of isobornyl acrylate IBOA, 10.7 parts of styrene St, 0.6 parts of di-tert-amyl peroxide DTAP were mixed to form a mixed solution A7 and set aside;

[0189] A2. In parts by mass, 23.9 parts of isophorone diisocyanate IPDI were heated to 50 ° C, and 14.2 parts of triethylene glycol divinyl ether DVE were added dropwise at a constant pressure within 15 minutes, and the reaction was continued for 1 hour to obtain a prepolymer containing a vinyl group and an isocyanate group B7, set aside;

[0190] A3. In a four-necked flask equipped with a thermometer, a condenser and a stirring paddle, 25.2 parts of special epoxy soybean oil GreenSoft D were added, stirred and heated to 73 ° C, 5.6 parts of cyclohexylaminopropanesulfonic acid CAPS were added, and the reaction was carried out for 75 minutes to obtain a hydrophilic modified bio-based material C7 for standby use;

[0191] A4. In parts by mass, 0.5 parts of cationic photoinitiator HRcure-9387 and 0.4 parts of free radical photoinitiator were mixed to form a mixture D7 for standby use;

[0192] A5. In terms of mass fractions, the hydrophilic modified bio-based material C7 was heated to 150°C and the mixed solution A7 was dripped into it at a constant pressure within 4 hours. After the dripping was completed, the mixture was stirred and kept warm for 30 minutes, cooled to 80°C, 0.01 parts of polymerization inhibitor MEHQ were added, 9.7 parts of diacetone acrylamide DAAM were added, the reaction was continued for 40 minutes, the temperature was cooled to 50°C, B7 was added, the reaction was continued for 30 minutes, D7 was added, 2.5 parts of triethylamine TEA were added after stirring for 5 minutes, 177 parts of deionized water were added after stirring for 5 minutes, and the mixture was dispersed at high speed for 10 minutes. The material was filtered to obtain a cationic light-curable polyacrylate dispersion containing a double bond component, which was set aside;

[0193] The preparation method of the hydrophilic modified epoxy resin containing epoxy group component is as follows:

[0194] B1. By mass, 17.2 parts of MF-4101 and 9.0 parts of cyclohexylaminopropanesulfonic acid CAPS were mixed evenly, the reaction temperature was controlled to 40°C, the reaction was carried out for 1.5 hours, 3.3 parts of triethylamine TEA were added and stirred for 5 minutes to form a hydrophilic modified epoxy resin containing an epoxy group component, which was set aside.

[0195] Comparative Example 5

[0196] A two-component light-curing coating 8:

[0197] In this comparative example, the hydrophilic modified epoxy resin neutralizer is added in excess, wherein the cationic light-curable polyacrylate dispersion is prepared by the following steps:

[0198] A1. In parts by mass, in parts by mass, 1.8 parts of acrylic acid AA, 13.8 parts of methyl methacrylate MMA, 5 parts of butyl acrylate BA, 4.3 parts of isobornyl acrylate IBOA, 10.7 parts of styrene St, 0.6 parts of di-tert-amyl peroxide DTAP were mixed to form a mixed solution A8 and set aside;

[0199] A2. In parts by mass, 23.9 parts of isophorone diisocyanate IPDI were heated to 50 ° C, and 14.2 parts of triethylene glycol divinyl ether DVE were added dropwise at a constant pressure within 15 minutes, and the reaction was continued for 1 hour to obtain a prepolymer containing a vinyl group and an isocyanate group B8, set aside;

[0200] A3. In a four-necked flask equipped with a thermometer, a condenser and a stirring paddle, 25.2 parts of special epoxy soybean oil GreenSoft D were added, stirred and heated to 73 ° C, 5.6 parts of cyclohexylaminopropanesulfonic acid CAPS were added, and the reaction was carried out for 75 minutes to obtain a hydrophilic modified bio-based material C8 for standby use;

[0201] A4. In parts by mass, 0.4 parts of a blocked cationic thermal initiator CTI-100, 0.5 parts of a cationic photoinitiator HRcure-9387 and 0.4 parts of a free radical photoinitiator were mixed to form a mixture D8 for standby use;

[0202] A5. In terms of mass fractions, when the hydrophilic modified bio-based material C8 is heated to 150°C, the mixed liquid A8 is dripped into it at a constant pressure within 4 hours. After dripping, it is stirred and kept warm for 30 minutes, cooled to 80°C, 0.01 parts of inhibitor MEHQ are added, 9.7 parts of diacetone acrylamide DAAM are added, the reaction is continued for 40 minutes, the temperature is cooled to 50°C, B8 is added, the reaction is continued for 30 minutes, D8 is added, 2.5 parts of triethylamine TEA are added after stirring for 5 minutes, 178 parts of deionized water are added after stirring for 5 minutes, and the dispersion is dispersed at high speed for 10 minutes. The material is filtered to obtain a cationic light-cured polyacrylate dispersion containing double bond components, which is set aside.

[0203] The preparation method of the hydrophilic modified epoxy resin containing epoxy group component is as follows:

[0204] B1. By mass, 16.8 parts of MF-4101 and 8.8 parts of cyclohexylaminopropanesulfonic acid CAPS were mixed evenly, the reaction temperature was controlled to 40°C, the reaction was carried out for 1.5 hours, 4 parts of triethylamine TEA were added and stirred for 5 minutes to form a hydrophilic modified epoxy resin containing an epoxy group component, which was set aside.

[0205] Comparative Example 6

[0206] A two-component light-curing coating 9:

[0207] In this comparative example, the addition ratio of the hydrophilic modified epoxy resin is different from that in the embodiment, wherein the cationic light-curable polyacrylate dispersion is prepared by the following steps:

[0208] A1. In parts by mass, in parts by mass, 1.8 parts of acrylic acid AA, 13.8 parts of methyl methacrylate MMA, 5 parts of butyl acrylate BA, 4.3 parts of isobornyl acrylate IBOA, 10.7 parts of styrene St, 0.6 parts of di-tert-amyl peroxide DTAP were mixed to form a mixed solution A9 and set aside;

[0209] A2. In parts by mass, 23.9 parts of isophorone diisocyanate IPDI were heated to 50 ° C, and 14.2 parts of triethylene glycol divinyl ether DVE were added dropwise at a constant pressure within 15 minutes, and the reaction was continued for 1 hour to obtain a prepolymer containing a vinyl group and an isocyanate group B9, set aside;

[0210] A3. In a four-necked flask equipped with a thermometer, a condenser and a stirring paddle, 25.2 parts of special epoxy soybean oil GreenSoft D were added, stirred and heated to 73 ° C, 5.6 parts of cyclohexylaminopropanesulfonic acid CAPS were added, and the reaction was carried out for 75 minutes to obtain a hydrophilic modified bio-based material C9 for standby use;

[0211] A4. In parts by mass, 0.4 parts of blocked cationic thermal initiator CTI-100, 0.5 parts of cationic photoinitiator HRcure-9387 and 0.4 parts of free radical photoinitiator were mixed to form a mixture D9 for standby use;

[0212] A5. In terms of mass fractions, when the hydrophilic modified bio-based material C9 is heated to 150°C, the mixed liquid A9 is dripped into it at a constant pressure within 4 hours. After dripping, it is stirred and kept warm for 30 minutes. The temperature is lowered to 80°C, 0.01 parts of polymerization inhibitor MEHQ are added, 9.7 parts of diacetone acrylamide DAAM are added, the reaction is continued for 40 minutes, the temperature is lowered to 50°C, B9 is added, the reaction is continued for 30 minutes, D9 is added, 2.5 parts of triethylamine TEA are added after stirring for 5 minutes, 178 parts of deionized water are added after stirring for 5 minutes, and the dispersion is dispersed at high speed for 10 minutes. The material is filtered to obtain a cationic light-cured polyacrylate dispersion containing double bond components, which is set aside.

[0213] The preparation method of the hydrophilic modified epoxy resin containing epoxy group component is as follows:

[0214] B1. By mass, 8.6 parts of MF-4101 and 4.5 parts of cyclohexylaminopropanesulfonic acid CAPS were mixed evenly, the reaction temperature was controlled to 40 ° C, the reaction was carried out for 1.5 hours, 1.6 parts of triethylamine TEA were added and stirred for 5 minutes to form a hydrophilic modified epoxy resin containing an epoxy group component, and the epoxy resin was set aside;

[0215] Comparative Example 7

[0216] A two-component light-curing coating 10:

[0217] In this comparative example, the addition ratio of the hydrophilic modified epoxy resin is different from that in the embodiment, wherein the cationic light-curable polyacrylate dispersion is prepared by the following steps:

[0218] A1. In parts by mass, in parts by mass, 1.8 parts of acrylic acid AA, 13.8 parts of methyl methacrylate MMA, 5 parts of butyl acrylate BA, 4.3 parts of isobornyl acrylate IBOA, 10.7 parts of styrene St, 0.6 parts of di-tert-amyl peroxide DTAP were mixed to form a mixed solution A10 and set aside;

[0219] A2. In parts by mass, 23.9 parts of isophorone diisocyanate IPDI were heated to 50 ° C, and 14.2 parts of triethylene glycol divinyl ether DVE were added dropwise at a constant pressure within 15 minutes, and the reaction was continued for 1 hour to obtain a prepolymer containing vinyl and isocyanate groups B10, set aside;

[0220] A3. In a four-necked flask equipped with a thermometer, a condenser and a stirring paddle, 25.2 parts of special epoxy soybean oil GreenSoft D were added, stirred and heated to 73 ° C, 5.6 parts of cyclohexylaminopropanesulfonic acid CAPS were added, and the reaction was carried out for 75 minutes to obtain a hydrophilic modified bio-based material C10 for standby use;

[0221] A4. In parts by mass, 0.4 parts of a blocked cationic thermal initiator CTI-100, 0.5 parts of a cationic photoinitiator HRcure-9387 and 0.4 parts of a free radical photoinitiator were mixed to form a mixture D10 for standby use;

[0222] A5. In terms of mass fractions, the hydrophilic modified bio-based material C10 was heated to 150°C and the mixed solution A10 was dripped into it at a constant pressure within 4 hours. After the dripping was completed, the mixture was stirred and kept warm for 30 minutes, cooled to 80°C, 0.01 parts of polymerization inhibitor MEHQ was added, 9.7 parts of diacetone acrylamide DAAM were added, the reaction was continued for 40 minutes, the temperature was cooled to 50°C, B10 was added, the reaction was continued for 30 minutes, D10 was added, 2.5 parts of triethylamine TEA were added after stirring for 5 minutes, 178 parts of deionized water were added after stirring for 5 minutes, and the mixture was dispersed at high speed for 10 minutes. The material was filtered to obtain a cationic light-curable polyacrylate dispersion containing a double bond component, which was set aside;

[0223] The preparation method of the hydrophilic modified epoxy resin containing epoxy group component is as follows:

[0224] B1. By mass, 34.5 parts of MF-4101 and 18.1 parts of cyclohexylaminopropanesulfonic acid CAPS were mixed evenly, the reaction temperature was controlled to 40 ° C, the reaction was carried out for 1.5 hours, 6.6 parts of triethylamine TEA were added and stirred for 5 minutes to form a hydrophilic modified epoxy resin containing an epoxy group component, and the mixture was set aside;

[0225] Comparative Example 8

[0226] Comparative Example A water-based two-component photocurable coating 4 was prepared. The cationic photocurable polyacrylate dispersion 4 and the hydrophilic modified epoxy resin 4 were prepared in Comparative Example 1. The specific steps were:

[0227] The double bond-containing component of the water-based two-component light-curing coating is composed of the following components in parts by weight:

[0228] 460 parts of cationic light-curable polyacrylate dispersion;

[0229] 0.5 parts of free radical photoinitiator Darocur 1173;

[0230] 1.0 part of free radical photoinitiator Lucirin TPO-L;

[0231]

[0232] The preparation method of the water-based two-component photocurable coating is as follows: adding the cationic photocurable polyacrylate dispersion 4 into a stirring kettle at a rotation speed of 700 rpm, premixing water, dipropylene glycol butyl ether and dipropylene glycol methyl ether and adding them into the stirring kettle, sequentially adding Darocur 1173, Lucirin TPO-L, Omnirad250, DISPERS 755W, titanium dioxide NTR-606, TEGO-800, RM-8W, TEGO-245, dispersing for 20 minutes, filtering to obtain the double bond-containing component of the water-based two-component photocurable coating, and uniformly mixing the double bond-containing component and the hydrophilic modified epoxy resin prepared in Comparative Example 1 at a ratio of 100:6 to obtain the water-based two-component photocurable coating 4;

[0233] The paint film prepared by the water-based two-component light-curing coating 4 was dried at 50°C for 2 hours, and the light curing machine was turned on with a mercury lamp and the UVV energy was adjusted to 600 mJ / cm 2 Curing, and baking at 100℃ for 2h after curing.

[0234] Comparative Example 9

[0235] A water-based photocurable coating 5 was prepared in the comparative example. The cationic photocurable polyacrylate dispersion 5 was prepared in the comparative example 2. The specific steps were as follows:

[0236] The double bond-containing component of the waterborne light-curing coating is composed of the following components in parts by weight:

[0237]

[0238]

[0239] The preparation method of the water-based photocurable coating is as follows: adding the cationic photocurable polyacrylate dispersion 5 into a stirring kettle at a rotation speed of 700 rpm, premixing water, dipropylene glycol butyl ether and dipropylene glycol methyl ether and adding them into the stirring kettle, adding Darocur 1173, Lucirin TPO-L, Omnirad250, DISPERS 755W, titanium dioxide NTR-606, TEGO-800, RM-8W and TEGO-245 in sequence, dispersing for 20 minutes, and filtering to obtain the water-based photocurable coating 5;

[0240] The paint film prepared by water-based light-curing coating 5 was dried at 50°C for 2 hours, and the light curing machine was turned on with a mercury lamp and the UVV energy was adjusted to 600 mJ / cm 2 Curing, and baking at 100℃ for 2h after curing.

[0241] Comparative Example 10

[0242] Comparative Example A water-based two-component photocurable coating 6 was prepared. The cationic photocurable polyacrylate dispersion 6 and the hydrophilic modified epoxy resin 6 were prepared in Comparative Example 3. The specific steps were:

[0243] The double bond-containing component of the water-based two-component light-curing coating is composed of the following components in parts by weight:

[0244]

[0245] The preparation method of the water-based two-component photocurable coating is as follows: adding the cationic photocurable polyacrylate dispersion 6 into a stirring kettle at a rotation speed of 700 rpm, premixing water, dipropylene glycol butyl ether and dipropylene glycol methyl ether and adding them into the stirring kettle, sequentially adding Darocur 1173, Lucirin TPO-L, Omnirad250, DISPERS 755W, titanium dioxide NTR-606, TEGO-800, RM-8W, TEGO-245, dispersing for 20 minutes, filtering to obtain the double bond-containing component of the water-based two-component photocurable coating, and uniformly mixing the double bond-containing component and the hydrophilic modified epoxy resin prepared in Comparative Example 3 at a ratio of 100:6 to obtain the water-based two-component photocurable coating 6;

[0246] The paint film prepared by the water-based two-component light-curing coating 6 was dried at 50°C for 2 hours, and the light curing machine was turned on with a mercury lamp and the UVV energy was adjusted to 600 mJ / cm 2 Curing, and baking at 100℃ for 2h after curing.

[0247] Comparative Example 11

[0248] Comparative Example A water-based two-component photocurable coating 7 was prepared. The cationic photocurable polyacrylate dispersion 7 and the hydrophilic modified epoxy resin 7 were prepared in Comparative Example 4. The specific steps were:

[0249] The double bond-containing component of the water-based two-component light-curing coating is composed of the following components in parts by weight:

[0250]

[0251] The preparation method of the water-based two-component photocurable coating is as follows: adding the cationic photocurable polyacrylate dispersion 7 into a stirring kettle at a rotation speed of 700 rpm, premixing water, dipropylene glycol butyl ether and dipropylene glycol methyl ether and adding them into the stirring kettle, sequentially adding Darocur 1173, Lucirin TPO-L, Omnirad250, DISPERS 755W, titanium dioxide NTR-606, TEGO-800, RM-8W, TEGO-245, dispersing for 20 minutes, filtering to obtain the double bond-containing component of the water-based two-component photocurable coating, and uniformly mixing the double bond-containing component and the hydrophilic modified epoxy resin prepared in Comparative Example 4 at a ratio of 100:6 to obtain the water-based two-component photocurable coating 7;

[0252] The paint film prepared by the water-based two-component light-curing coating 7 was dried at 50°C for 2 hours, and the light curing machine was turned on with a mercury lamp and the UVV energy was adjusted to 600 mJ / cm 2 Curing, and baking at 100℃ for 2h after curing.

[0253] Comparative Example 12

[0254] Comparative Example A water-based two-component photocurable coating 8 was prepared. The cationic photocurable polyacrylate dispersion 8 and the hydrophilic modified epoxy resin 8 were prepared in Comparative Example 5. The specific steps were:

[0255] The double bond-containing component of the water-based two-component light-curing coating is composed of the following components in parts by weight:

[0256]

[0257] The preparation method of the water-based two-component photocurable coating is as follows: adding the cationic photocurable polyacrylate dispersion 8 into a stirring kettle at a rotation speed of 700 rpm, premixing water, dipropylene glycol butyl ether and dipropylene glycol methyl ether and adding them into the stirring kettle, sequentially adding Darocur 1173, Lucirin TPO-L, Omnirad250, DISPERS 755W, titanium dioxide NTR-606, TEGO-800, RM-8W, TEGO-245, dispersing for 20 minutes, filtering to obtain the double bond-containing component of the water-based two-component photocurable coating, and uniformly mixing the double bond-containing component and the hydrophilic modified epoxy resin prepared in Comparative Example 5 at a ratio of 100:6 to obtain the water-based two-component photocurable coating 8;

[0258] The paint film prepared by the water-based two-component light-curing coating 8 was dried at 50°C for 2 hours, and the light curing machine was turned on with a mercury lamp and the UVV energy was adjusted to 600 mJ / cm 2 Curing, and baking at 100℃ for 2h after curing.

[0259] Comparative Example 13

[0260] Comparative Example A water-based two-component photocurable coating 9 was prepared. The cationic photocurable polyacrylate dispersion 9 and the hydrophilic modified epoxy resin 9 were prepared in Comparative Example 6. The specific steps were:

[0261] The double bond-containing component of the water-based two-component light-curing coating is composed of the following components in parts by weight:

[0262]

[0263]

[0264] The preparation method of the water-based two-component photocurable coating is as follows: adding the cationic photocurable polyacrylate dispersion 9 into a stirring kettle at a rotation speed of 700 rpm, premixing water, dipropylene glycol butyl ether and dipropylene glycol methyl ether and adding them into the stirring kettle, sequentially adding Darocur 1173, Lucirin TPO-L, Omnirad250, DISPERS 755W, titanium dioxide NTR-606, TEGO-800, RM-8W, TEGO-245, dispersing for 20 minutes, filtering to obtain the double bond-containing component of the water-based two-component photocurable coating, and uniformly mixing the double bond-containing component and the hydrophilic modified epoxy resin prepared in Comparative Example 6 at a ratio of 100:3 to obtain the water-based two-component photocurable coating 9;

[0265] The paint film prepared by the water-based two-component light-curing coating 9 was dried at 50°C for 2 hours, and the light curing machine was turned on with a mercury lamp and the UVV energy was adjusted to 600 mJ / cm 2 Curing, and baking at 100℃ for 2h after curing.

[0266] Comparative Example 14

[0267] Comparative Example A water-based two-component photocurable coating 10 was prepared. The cationic photocurable polyacrylate dispersion 10 and the hydrophilic modified epoxy resin 10 were prepared in Comparative Example 7. The specific steps were:

[0268] The double bond-containing component of the water-based two-component light-curing coating is composed of the following components in parts by weight:

[0269]

[0270]

[0271] The preparation method of the water-based two-component photocurable coating is as follows: a cationic photocurable polyacrylate dispersion 10 is added to a stirring kettle at a rotation speed of 700 rpm, water, dipropylene glycol butyl ether and dipropylene glycol methyl ether are premixed and added to the stirring kettle, Darocur 1173, Lucirin TPO-L, Omnirad250, DISPERS 755W, titanium dioxide NTR-606, TEGO-800, RM-8W, and TEGO-245 are added in sequence, dispersed for 20 minutes, filtered to obtain a double bond-containing component of the water-based two-component photocurable coating, and the double bond-containing component and the hydrophilic modified epoxy resin prepared in Comparative Example 7 are uniformly mixed in a ratio of 100:20 to obtain a water-based two-component photocurable coating 10;

[0272] The paint film prepared by the water-based two-component light-curing coating 10 was dried at 50°C for 2 hours, and the light curing machine was turned on with a mercury lamp and the UVV energy was adjusted to 600 mJ / cm 2 Curing, and baking at 100℃ for 2h after curing.

[0273] Test Example 1

[0274] Basic performance tests include: light-cured bio-based polyurethane dispersions are tested in accordance with GB / T11175-2002 "Test Methods for Synthetic Resin Emulsions", and the appearance, pH, solid content, and viscosity of the emulsion are tested. The double bond / epoxy concentration is obtained by theoretical calculation. The double bond / epoxy concentration is the ratio of the amount of double bond / epoxy substance to the mass of the emulsion or coating solid content, in mol / 100g. The average particle size of the emulsion is measured using a nanoparticle size analyzer (ZS Nano S).

[0275] Table 1 Performance parameters of cationic light-cured polyacrylate dispersion and hydrophilic modified epoxy resin

[0276]

[0277]

[0278] As can be seen from the above table, compared with Example 1, the amount of prepolymer containing vinyl and isocyanate groups is halved in Comparative Example 1, and there is no obvious difference in the dispersion; compared with Example 1, hydrophilic modified epoxy resin and polyacrylate prepolymer are co-dispersed in Comparative Example 2 to obtain a single-component dispersion, and the storage stability is poor; compared with Example 1, no acrylamide monomer is added in Comparative Example 3, and the storage stability of the dispersion is poor; compared with Example 1, no blocked cationic thermal initiator is added in Comparative Example 4, and there is no obvious difference in the dispersion; compared with Example 1, excessive addition of hydrophilic modified epoxy resin neutralizer is added in Comparative Example 5, which makes the storage stability of the epoxy resin worse; compared with Example 1, only the proportion of hydrophilic modified epoxy resin is different in Comparative Examples 6 and 7; as can be seen from Examples 1, 2, and 3, the present invention discloses a method for preparing an epoxy-modified light-curable polyacrylate dispersion and a hydrophilic modified epoxy resin, and the prepared epoxy-modified light-curable polyacrylate dispersion and hydrophilic modified epoxy resin have good storage stability.

[0279] Test Example 2

[0280] The paint film made of water-based two-component light-curing coating was dried at 50°C for 2 hours, and the light curing machine was turned on with a mercury lamp and the UVA energy was adjusted to 600mJ / cm 2 The properties are shown in Table 2.

[0281] The test standards are:

[0282] Coating appearance: visual inspection;

[0283] Pencil hardness: GB / T6739-2006;

[0284] Coating gloss / (60°,%): GB / T9754-2007;

[0285] Water resistance (25℃, 24h): GB / T4893.1-2020;

[0286] Dry heat resistance (70±2℃, 15h): GB / T4893.3-2020;

[0287] Ethanol resistance (50%, 1h): GB / T4893.1-2020;

[0288] Adhesion: GB / T9286-2021.

[0289] Table 2 Performance parameters of water-based two-component light-curing coatings

[0290]

[0291]

[0292]

[0293]

[0294] As can be seen from the above table, compared with Example 4, the amount of prepolymer containing vinyl and isocyanate groups in Comparative Example 8 is halved, the double bond concentration is reduced, the residual hydroxyl group is increased, and the paint film resistance is poor; compared with Example 4, Comparative Example 9 is a single-component coating, the paint film performance is close, but the storage stability is poor; compared with Example 4, no acrylamide monomer is added in Comparative Example 10, the free radical photocuring is reduced, the residual epoxy group, and the paint film resistance is poor; compared with Example 4, no blocked cationic thermal initiator is added in Comparative Example 11, and the paint film resistance and adhesion to substrates such as pine and glass are slightly poor. Compared with Example 4, there is no obvious difference in the paint film performance of Comparative Example 12, but the storage stability of its epoxy component is poor. Compared with Example 4, the addition ratio of hydrophilic modified epoxy resin in Comparative Example 13 is reduced, and the paint film resistance, pine wood adhesion, and melamine board adhesion are poor; compared with Example 4, the addition ratio of hydrophilic modified epoxy resin in Comparative Example 14 is too high, and the paint film has poor adhesion on glass, tiles and melamine boards. It can be seen from Examples 4, 5, and 6 that the paint film made of the water-based two-component photocurable coating disclosed in the present invention has the advantages of good flexibility, good water resistance and chemical resistance, excellent adhesion to various substrates, etc., and can be applied to high-end wood coatings, automotive coatings, metal anti-corrosion coatings and other industrial protective coatings.

[0295] The above is a detailed description of the embodiments of the present invention, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A method for preparing a water-based two-component light-curing coating, characterized in that: The raw materials for preparing the water-based two-component light-curing coating include: a cationic light-curing polyacrylate dispersion containing a double bond component and a hydrophilic modified epoxy resin containing an epoxy group component; The preparation method of the cationic light-curable polyacrylate dispersion containing double bond components comprises: A1. The acrylic acid monomer, the acrylate monomer, the vinyl monomer, and the initiator are uniformly mixed to form a mixed solution A; A2. reacting diisocyanate and hydroxy vinyl ether to obtain a prepolymer B containing a vinyl group and an isocyanate group; A3. reacting the bio-based material and the hydrophilic modifier to obtain a hydrophilic modified bio-based material C; A4. The blocked cationic thermal initiator, the cationic photoinitiator, and the free radical photoinitiator are mixed to form a mixture D; A5. The hydrophilic modified bio-based material C, the mixed solution A, the polymerization inhibitor, the acrylamide monomer, the prepolymer B containing vinyl and isocyanate groups, the mixture D, and the neutralizer are mixed, dispersed, and filtered to obtain a cationic light-curable polyacrylate dispersion containing a double bond component; The preparation method of the hydrophilic modified epoxy resin containing epoxy group component comprises: B1. Mixing epoxy resin, hydrophilic modifier and neutralizer to form hydrophilic modified epoxy resin containing epoxy group component.

2. The preparation method according to claim 1, characterized in that: The preparation method of the cationic light-curable polyacrylate dispersion containing double bond components comprises: A1. In parts by mass, 1.5 to 2.5 parts of acrylic acid monomer, 20 to 30 parts of acrylate monomer, 5 to 11 parts of vinyl monomer and 0.4 to 0.6 parts of initiator are mixed to form a mixed solution A; A2. In parts by mass, 18 to 30 parts of diisocyanate and 12 to 20 parts of hydroxy vinyl ether are reacted to obtain a prepolymer B containing a vinyl group and an isocyanate group; A3. By weight, 18 to 26 parts of a bio-based material and 5 to 6 parts of a hydrophilic modifier are reacted to obtain a hydrophilic modified bio-based material C; A4. In parts by mass, 0.3 to 0.5 parts of a blocked cationic thermal initiator, 0.3 to 0.6 parts of a cationic photoinitiator and 0.3 to 0.5 parts of a free radical photoinitiator are mixed to form a mixture D; A5. By weight, the hydrophilic modified bio-based material C, the mixed solution A, the polymerization inhibitor, 6 to 10 parts of acrylamide monomer, the prepolymer B containing vinyl and isocyanate groups, the mixture D, and the neutralizer are mixed, dispersed, and filtered to obtain a cationic light-curable polyacrylate dispersion containing a double bond component; The preparation method of the hydrophilic modified epoxy resin containing epoxy group component comprises: B1. By weight, 12 to 20 parts of epoxy resin, 8 to 15 parts of hydrophilic modifier and 3 to 5 parts of neutralizer are mixed and reacted to form a hydrophilic modified epoxy resin containing an epoxy group component.

3. The preparation method according to claim 1, characterized in that: The preparation method comprises the following steps: The cationic light-curing polyacrylate dispersion containing double bond components is dispersed and then mixed with the hydrophilic modified epoxy resin in a weight ratio of 100:(5-15) to obtain a water-based two-component light-curing coating.

4. The preparation method according to claim 1, characterized in that: The raw materials for preparing the bio-based material include vegetable oil containing more than three epoxy groups; The hydrophilic modifier includes a monomer containing a secondary amino group and a sulfonic acid group; The epoxy resin includes an epoxy resin containing three or more epoxy groups.

5. The preparation method according to claim 1, characterized in that: The neutralizing agent includes a tertiary amine neutralizing agent.

6. The preparation method according to claim 1, characterized in that: The hydroxy vinyl ether includes at least one of 4-hydroxybutyl vinyl ether, triethylene glycol divinyl ether and cyclohexyl-1,4-dimethanol monovinyl ether.

7. The preparation method according to claim 1, characterized in that: The epoxy resin includes at least one of tetraglycidyl diaminodimethylene benzene, diglycidyl 4,5-epoxytetrahydrophthalate, and triglycidyl-p-aminophenol.

8. The preparation method according to claim 1, characterized in that: The raw materials for preparing the water-based two-component light-curing coating also include auxiliary agents, and the auxiliary agents include: film-forming auxiliary agent, dispersant, titanium dioxide, defoamer, thickener and wetting agent.

9. A water-based two-component light-curing coating, characterized in that: The method is prepared according to any one of claims 1 to 8.

10. Use of the water-based two-component light-curing coating according to claim 9 in the fields of wood product preparation, automobile manufacturing or metal product corrosion protection.

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