Multifunctional waterborne epoxy acrylic resin composition and preparation method thereof

A technology of epoxy acrylic resin and resin composition, which is applied in the field of coatings, can solve the problems of water-based acrylic resin application field limitations, water resistance is not long-term, poor anti-sticking property, etc., to improve storage stability, easy to water-based, excellent performance effect

Inactive Publication Date: 2020-11-17
JIANGSU HUAXIA PAINT MAKING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, water-based acrylic resin is more favored by people; water-based acrylic resin has the advantages of non-polluting, non-toxic, non-irritating, good gloss, good chemical resistance, high stability, safe production, and low price. It also has its own shortcomings that cannot be eliminated, mainly manifested in hot stickiness and cold brittleness after the resin film is dried, poor back-adhesion resistance, poor heat resistance, not long-term water resistance, poor impact resistance, etc., thus limiting the use of water-based acrylic resins. The field of application is limited

Method used

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  • Multifunctional waterborne epoxy acrylic resin composition and preparation method thereof
  • Multifunctional waterborne epoxy acrylic resin composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of multifunctional water-based epoxy acrylic resin composition, prepared by the following steps:

[0022] Step 1: Mix bisphenol A epoxy resin with a molar ratio of 1:0.8 and a monobasic acid or a dibasic acid, use a mixture of propylene glycol ether and cyclohexanone with a mass ratio of 1:1 as a solvent, add a catalyst, and reflux Heating the material to 160°C under the state, keeping it warm for 2.5h, when the acid value drops below 1mgKOH / g, stop heating, and obtain the modified bisphenol A epoxy resin;

[0023] Step 2: Add 7 parts of acrylic acid, 5 parts of styrene, 4 parts of acrylonitrile and 45 parts of water into the reaction kettle in sequence, add emulsifier to emulsify for 28 minutes; add 1.5 parts of initiator into water to dissolve, add 30% of the initiator solution mass dropwise Into the reaction kettle, add dropwise for 1.5 hours, and at the same time heat the material to 75°C, stir and react for 1.5 hours to obtain emulsion A;

[0...

Embodiment 2

[0027] A preparation method of multifunctional water-based epoxy acrylic resin composition, prepared by the following steps:

[0028] Step 1: Mix bisphenol A type epoxy resin with a molar ratio of 1:1.0 and a monobasic acid or a dibasic acid, use a mixture of propylene glycol ether and cyclohexanone with a mass ratio of 1:1 as a solvent, add a catalyst, and reflux Heating the material to 155°C under the state, keeping it warm for 3 hours, when the acid value drops below 1mgKOH / g, stop heating, and obtain the modified bisphenol A epoxy resin;

[0029] Step 2: Add 8 parts of acrylic acid, 6 parts of styrene, 5 parts of acrylonitrile and 55 parts of water into the reaction kettle in sequence, add emulsifier to emulsify for 25 minutes; add 2 parts of initiator into water to dissolve, add 30% of the initiator solution mass Into the reaction kettle, add dropwise for 1 hour, heat the material to 80°C at the same time, stir and react for 1.2 hours to obtain emulsion A;

[0030] Step ...

Embodiment 3

[0033] A preparation method of multifunctional water-based epoxy acrylic resin composition, prepared by the following steps:

[0034] Step 1: Mix bisphenol A type epoxy resin with a molar ratio of 1:1.0 and a monobasic acid or a dibasic acid, use a mixture of propylene glycol ether and cyclohexanone with a mass ratio of 1:1 as a solvent, add a catalyst, and reflux Heating the material to 170°C under the state, keeping it warm for 3.5h, when the acid value drops below 1mgKOH / g, stop heating, and obtain the modified bisphenol A epoxy resin;

[0035] Step 2: Add 6 parts of acrylic acid, 4 parts of styrene, 4 parts of acrylonitrile and 60 parts of water into the reaction kettle in sequence, add emulsifier to emulsify for 26 minutes; add 1.5 parts of initiator into water to dissolve, add 30% of the initiator solution mass dropwise Into the reaction kettle, add dropwise for 1.5 hours, and at the same time heat the material to 80°C, stir and react for 1.0 hours to obtain emulsion A; ...

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Abstract

The invention discloses a multifunctional waterborne epoxy acrylic resin composition and a preparation method thereof. The composition is obtained by copolymerization of modified bisphenol A epoxy resin and a core-shell structure acrylic prepolymer, and is prepared by the following steps: (1) mixing bisphenol A epoxy resin with monobasic acid or dibasic acid to obtain modified bisphenol A epoxy resin; (2) sequentially adding acrylic acid, styrene, acrylonitrile and water into a reaction kettle to obtain an emulsion A; (3) adding acrylic acid, styrene, acrylonitrile and a molecular weight regulator into the emulsion A, and conducting reacting to obtain an acrylic prepolymer with a core-shell structure; and (4) mixing the acrylic prepolymer with the modified bisphenol A epoxy resin for reaction to obtain a multifunctional waterborne epoxy acrylic resin composition. The acrylic resin is modified by the epoxy resin, and excessive crosslinking of the epoxy resin and the acrylic resin is prevented by adopting a two-step reaction, so that the resin composition has high water solubility, excellent adhesive force, high hydrolysis resistance, high film-forming strength and excellent wear resistance, acid resistance and alkali resistance.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a multifunctional water-based epoxy acrylic resin composition and a preparation method thereof. Background technique [0002] Coatings used for metal materials or inorganic non-metallic materials occupy the largest share in the coating market. The original solvent-based coatings have always been diluted with organic solvents such as toluene, xylene, trimethylbenzene, ethyl acetate, butyl acetate, and cyclohexanone. Chemicals, strong smell, harmful to human health, environmental pollution, etc. The discharge of pollutants is strictly controlled by the environmental protection department. From manufacturing to coating application, once the management is negligent, it is easy to cause combustion and explosion, and it belongs to the hazardous chemical supervision product. Water-soluble coatings avoid these risks, greatly reducing VOC emissions, and replacing solvents wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D151/00C09D163/00C09D5/08C08F265/02C08F220/06C08F212/08C08F220/46
CPCC08F265/02C09D5/08C09D151/003C08L63/00C08F220/06C08F212/08C08F220/46
Inventor 解宝盛解峰窦亚澄蒋启荣花海军
Owner JIANGSU HUAXIA PAINT MAKING
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