Water-borne epoxy resin, water-borne OP protective agent and preparation methods thereof
A water-based epoxy resin, epoxy resin technology, applied in the direction of epoxy resin coating, coating, etc., can solve the problems of poor performance of water-based OP protective agent, high cost of water-based OP protective agent, heat resistance and adhesion gap, etc. , to achieve the effect of stable performance, reasonable cost and high heat resistance
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[0043] The preparation process of waterborne epoxy resin is as follows: figure 1 As shown, follow the steps below:
[0044] Step S1, prepare 45-80 parts of methyl methacrylate, 20-50 parts of butyl acrylate, 8-15 parts of hydroxyethyl acrylate, 10-18 parts of acrylic acid, 1-5 parts of initiator and 1-5 parts of silane The joint agent is mixed evenly;
[0045] Step S2, add 4 to 15 parts of epoxy resin and 50 to 100 parts of solvent in a four-neck flask equipped with a stirrer, condenser tube, thermometer and dropping funnel, the solvent is isopropanol, n-propanol or absolute ethanol , heat up to 60-85°C and stir to dissolve until transparent;
[0046] Step S3, adding the mixed solution prepared in step S1 to the four-necked bottle of step S2 within 1 to 3 hours, and introducing nitrogen protection, and then insulated and refluxed for 40 to 80 minutes;
[0047] The prepared mixed solution is added to the reaction bottle within 1-3 hours. Direct addition will cause the reacti...
Embodiment 1
[0075] Water-based epoxy resin, according to the number of parts by mass, consists of 45 parts of methyl methacrylate, 20 parts of butyl acrylate, 8 parts of hydroxyethyl acrylate, 10 parts of acrylic acid, 1 part of silane coupling agent, 1 part of initiator, epoxy Composed of 15 parts of resin, 20 parts of neutralizer, and 300 parts of water.
[0076] The water-based OP protective agent prepared by water-based epoxy resin is composed of 550 parts of water-based epoxy resin, 65 parts of curing agent, 1 part of catalyst, 3 parts of leveling agent, 50 parts of cosolvent, and 3 parts of neutralizing agent according to the mass parts , 1 part of defoamer, and 250 parts of water.
Embodiment 2
[0078] Water-based epoxy resin, according to the number of parts by mass, consists of 62.5 parts of methyl methacrylate, 35 parts of butyl acrylate, 11.5 parts of hydroxyethyl acrylate, 14 parts of acrylic acid, 3 parts of silane coupling agent, 3 parts of initiator, epoxy It consists of 9.5 parts of resin, 15 parts of neutralizer and 215 parts of water.
[0079]The water-based OP protective agent prepared by water-based epoxy resin is composed of 600 parts of water-based epoxy resin, 77.5 parts of curing agent, 5.5 parts of catalyst, 1.5 parts of leveling agent, 35 parts of cosolvent, and 1.5 parts of neutralizing agent according to the mass parts , 0.5 parts of defoamer, and 225 parts of water.
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