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Acrylic resin used for high-solid-content stoving varnish and preparation method thereof

An acrylic resin, high solid technology, applied in the direction of coating, etc., to achieve the effect of low viscosity and low VOC content

Inactive Publication Date: 2016-03-23
JIANGMEN PAINT FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the preparation of high solids coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In terms of mass percentage, 0.2% of acrylic acid, 5% of methyl methacrylate, 5% of styrene, 35% of butyl acrylate, 4% of hydroxyethyl acrylate and 6% of hydroxypropyl acrylate were added to the In monomer tank A, add 6.8% 3,5,5-trimethylhexanoic acid tert-butyl peroxide into monomer tank B, stir evenly, cool down to 35°C with cooling water, and set aside. Add 10% xylene, 8% methyl ethyl ketone and 20% glycidyl tertiary carbonic acid ester into the reactor, seal the reactor, vacuumize the air in the reactor, then repress to normal pressure with nitrogen, and again After vacuuming to 0.07-0.09MPa, repressurize to normal pressure with nitrogen. Start stirring, after stirring evenly, the temperature of the reaction kettle is raised to 140°C, and the pressure in the reaction kettle is kept between 0.02-0.1MPa. After the addition, continue to react for 2 hours, lower the temperature and cool down, filter with a filter bag of 10 microns or less, and the product obtained afte...

Embodiment 2

[0027] By mass percentage, 0.4% of acrylic acid, 0.4% of methacrylic acid, 5% of methyl methacrylate, 5% of styrene, 10% of isobornyl methacrylate, 30% of isooctyl acrylate , 3% hydroxyethyl methacrylate and 2% hydroxypropyl methacrylate were added to monomer tank A, 1% peroxy-2-ethylhexanoic acid tert-butyl, 1.5% peroxide Add tert-butyl benzoate, 1.2% benzoyl peroxide, 0.5% di-tert-butyl peroxide and 1% di-tert-amyl peroxide into monomer tank B, stir evenly, and cool down with cooling water to 20°C and set aside. Add 5% xylene, 3% methyl ethyl ketone, 3% methyl ethyl ketone, 5% butyl acetate, 3% toluene and 20% glycidyl tertiary carbonate to the reaction kettle, seal the reaction kettle, and evacuate Evacuate the air in the reaction kettle, then repressurize to normal pressure with nitrogen, and then repressurize to 0.07-0.09MPa with nitrogen, then repressurize to normal pressure with nitrogen. Start stirring, after stirring evenly, the temperature of the reaction kettle is...

Embodiment 3

[0029] By mass percentage, 0.2% of acrylic acid, 0.5% of methacrylic acid, 0.3% of fumaric acid, 0.5% of itaconic acid, 30% of methyl methacrylate, 5% of butyl acrylate, 10% Isooctyl acrylate and 10% hydroxyethyl acrylate were added to monomer tank A, 2% 3,5,5-trimethylhexanoic acid tert-butyl peroxide, 4% tert-benzoic acid peroxide Add butyl ester and 2% dicumyl peroxide into monomer tank B, stir evenly, cool down to 10°C with cooling water, and set aside. Add 10% methyl ethyl ketone, 5% butyl acetate, 5% toluene and 15.5% glycidyl tert-carbonate into the reaction kettle, seal the reaction kettle, evacuate the air in the reaction kettle, and then repress with nitrogen To normal pressure, vacuum again to 0.07-0.09MPa, then repressurize to normal pressure with nitrogen. Start stirring, after stirring evenly, the temperature of the reaction kettle is raised to 170°C, and the pressure in the reaction kettle is kept between 0.02-0.1MPa. After the addition, continue to react for ...

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Abstract

The invention provides a preparation method of acrylic resin used for high-solid-content stoving varnish. The acrylic resin includes, by weight, 18-22% of a solvent, 0.2-2% of a carboxyl monomer, 10-30% of a hard monomer, 15-35% of a soft monomer, 5-10% of a hydroxyl acrylic monomer, 10-20% of glycidyl tertiary carboxylic ester and 2-8% of an initiator. The acrylic resin is more than 80% in solid content, is low in viscosity and is concentrated in molecular weight distribution. In application of spray coating on automobiles, the acrylic resin is free of addition of a solvent for dilution, is low in VOC content which satisfies national standard of emission standard of VOC content in coatings and has wide application in the field of automobile spray coating.

Description

technical field [0001] The invention relates to the field of acrylic coatings, in particular to an acrylic resin for high-solid baking varnishes and a preparation method thereof. Background technique [0002] With the increasingly stringent environmental protection requirements worldwide and the collection of VOC consumption tax in China, new demands have been put forward for traditional coating products. In this case, how to improve the durability of coatings, improve their acid resistance and gloss retention, develop environmentally friendly coatings and coating technologies, reduce volatile organic compounds in production and construction, and rationalize production costs have become domestic issues. Outside the design center of most paint and resin developers. [0003] At present, the research directions for reducing VOC emissions from coatings at home and abroad mainly include water-based coatings, powder coatings and high-solid coatings. Since water-based coating pro...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F220/28C08F220/14C08F212/08C08F220/06C09D133/08C09D133/10C09D133/12
CPCC08F220/14C08F220/18C08F220/1804C08F220/1808C09D133/08C09D133/10C09D133/12C08F212/08C08F220/281C08F220/06C08F222/02
Inventor 黄晓昌
Owner JIANGMEN PAINT FACTORY
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