Acrylic resin and preparation method and application thereof

A technology of acrylic resin and acrylate, which is applied in coatings, polyurea/polyurethane coatings, etc., and can solve problems such as poor mechanical properties and water resistance, low VOC content, poor water resistance and mechanical properties of coating films, etc.

Active Publication Date: 2019-03-12
WUXI ACRYL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the coating film water resistance and mechanical property of described coating are relatively poor
[0006] CN105925157A discloses a two-component water-based polyurethane floor paint and a preparation method thereof. The floor paint is composed of components A and B, wherein, component A contains a hydroxyacrylic emulsion, and the hydroxyl content of the hydroxyacrylic emulsion is 1.2 ~1.5%, component B contains self-emulsifying polydiisocyanate, the mass ratio of components A and B is 6~10:1, and the two-component water-based polyurethane floor paint can be normally applied under low temperature conditions, has high hardness and is resistant to freezing and thawing. Good stability, but poor water resistance
Using acrylic latex polyol as component A and hydrophilic modified HDI trimer as component B, the two are mixed and cured to form a film, and a two-component waterborne polyurethane coating film is obtained, whose comprehensive properties are close to the corresponding two-component Solvent-based polyurethane coating film, but its VOC content is low, which meets environmental protection requirements, but its mechanical properties and water resistance are poor

Method used

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  • Acrylic resin and preparation method and application thereof
  • Acrylic resin and preparation method and application thereof
  • Acrylic resin and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0086] The acrylic resin 1 that this preparation example obtains is made up of following structural unit:

[0087]

[0088] where n 1 is 10, n 2 is 40, n 3 is 15, n 4 is 10, namely n 1 / n 0 is 0.13.

[0089] The preparation method of acrylic resin is as follows:

[0090] (1) Solution polymerization: put 60% of the total amount of propylene glycol monomethyl ether into a reactor equipped with a stirring device, a condenser, a temperature control system and a monomer dropping device, slowly heat up to the boiling point of the solvent, and start dripping after reflux add Methyl methacrylate, butyl acrylate, 2-ethylhexyl methacrylate, hydroxyethyl methacrylate, acrylic acid, remaining 40% propylene glycol monomethyl ether, 75% tert-butyl peroxybenzoate And the mixed solution of mercaptoethanol is added dropwise within 5 hours, kept warm for 1 hour, added the remaining 25% tert-butyl peroxybenzoate, kept warm for 1 hour, and stopped heating to obtain a hydroxyacrylate co...

preparation example 2

[0096] The difference with Preparation Example 1 is that in acrylic resin 2 n 1 is 1, n 2 is 55, n 3 is 25, n 4 is 20, namely n 1 / n 0 is 0.01.

preparation example 3

[0098] The difference with Preparation Example 1 is that the n in acrylic resin 3 1 is 16, n 2 is 40, n 3 is 15, n 4 is 10, namely n 1 / n 0 is 0.2.

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Abstract

The invention discloses acrylic resin and a preparation method and application thereof. The acrylic resin comprises at least one structural unit (A), at least one structural unit (B), at least one structural unit (C) and at least one structural unit (D). The acrylic resin is obtained by subjecting o-hydroxyl type bridge ring structure acrylate and other acrylate monomers to solution polymerizationand neutralizing dispersion. In addition, the invention further provides a film forming composition comprising polyisocyanate and the acrylic resin and a bi-component waterborne polyurethane coatingcomprising the film forming composition or the acrylic resin. A compact grid structure is formed after curing crosslinking, hydrophobic polycyclic ester group containing bridge ring structure of the acrylic resin endows a coating with higher waterproofness and better physical and mechanical performance.

Description

technical field [0001] The invention relates to the field of polyurethane coatings, in particular to an acrylic resin and its preparation method and application. Background technique [0002] Two-component solvent-based polyurethane coatings have excellent properties such as low film-forming temperature, good abrasion resistance, high hardness, good chemical resistance and weather resistance, and are widely used as industrial protection, wood furniture and automotive coatings. [0003] The two-component water-based polyurethane is composed of the hydroxyl component of the polymer rich in hydroxyl groups in the molecular chain and the isocyanate curing agent. The isocyanate is used as a crosslinking agent, which can react with the hydroxyl group to form a cured crosslinked network structure. The hydroxyl component is used as the coating. The main body plays a major role in the performance of the coating film, affecting the dispersion of the curing agent in the water phase, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/18C08F220/20C08F220/06C09D175/04
CPCC09D175/04C08F220/14C08F220/18C08F220/1804C08F220/1818C08F220/20C08F220/06C08F220/1806
Inventor 施英张文泉黄佳斯
Owner WUXI ACRYL TECH
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