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Hydroxyl acrylic acid dispersion and synthetic method thereof

A technology of hydroxyacrylic acid and dispersion, applied in the field of coatings, can solve the problems of restricting the development of hydroxyacrylic acid dispersion, unstable and poor stability of hydroxyacrylic acid dispersion, and achieve the effects of moderate molecular weight, narrow molecular weight distribution and high stability

Active Publication Date: 2018-09-28
GUANGDONG HENGGUANG CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, a large amount of solvent needs to be added in the synthesis process of this type of acrylic dispersion, and the VOC emission is far greater than that of the acrylic emulsion. In order to reduce the VOC emission, the existing technology includes adding polyether polyol and polyester polyol during the synthesis process to act as a reactive diluent. When curing, polyether polyols and polyester polyols participate in the crosslinking reaction and do not generate VOC emissions. However, these reactive diluents have a defect of poor stability, which makes the prepared hydroxyacrylic acid dispersion unstable and easy to separate. Limits the development of hydroxyacrylic dispersions

Method used

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  • Hydroxyl acrylic acid dispersion and synthetic method thereof
  • Hydroxyl acrylic acid dispersion and synthetic method thereof
  • Hydroxyl acrylic acid dispersion and synthetic method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 10 parts of air-drying resin and 2 parts of ethylene glycol butyl ether were added to the reaction vessel, heated to 115°C to dissolve, 3 parts of acrylic acid, 20 parts of butyl acrylate, 10 parts of hydroxyethyl methacrylate, methyl methacrylate 22 parts of ester, 22 parts of styrene, and 3 parts of tert-butyl peroxybenzoate were mixed evenly, and added dropwise to the reaction vessel for 3-4 hours. , and the final reaction was incubated for 1 h. The temperature was lowered to 80° C., 4 parts of neutralizing agent N,N-dimethylethanolamine were added, 2 parts of drier were dispersed in 140 parts of water, and then cooled to room temperature to obtain a hydroxyacrylic acid dispersion.

[0031] The air-drying resin used in this example is prepared by the following method:

[0032] The four-hole flask was equipped with nitrogen, mechanical stirring, thermocouple, and reflux condenser respectively. 878 parts of linseed oil were added to the flask, the temperature was rais...

Embodiment 2

[0034] 10 parts of air-drying resin and 2 parts of ethylene glycol butyl ether were added to the reaction vessel, heated to 115°C to dissolve, 3 parts of acrylic acid, 20 parts of butyl acrylate, 10 parts of hydroxyethyl methacrylate, methyl methacrylate 22 parts of ester, 22 parts of styrene, and 3 parts of tert-butyl peroxybenzoate were mixed evenly, and added dropwise to the reaction vessel for 3-4 hours. , and the final reaction was incubated for 1 h. The temperature was lowered to 80° C., 4 parts of a neutralizing agent dimethylethanolamine was added, and 2 parts of a drier was dispersed in 140 parts of water, and cooled to room temperature to obtain a hydroxyacrylic acid dispersion.

[0035] The air-drying resin used in this example is prepared by the following method:

[0036] The four-hole flask was equipped with nitrogen, mechanical stirring, thermocouple, and reflux condenser respectively. 878 parts of linseed oil were added to the flask, the temperature was raised ...

Embodiment 3

[0038] A hydroxyacrylic acid dispersion, in parts by weight, comprising 7 parts of air-drying resin, 1 part of acrylic acid, 6 parts of hydroxyethyl methacrylate, 25 parts of isobornyl methacrylate, 25 parts of styrene, peroxide 9 parts of benzoic acid, 2 parts of ethylene glycol butyl ether, 4 parts of triethylamine, 2 parts of drier, and 100 parts of deionized water. The air-drying resin includes polyethylene glycol lauryl ether, triglyceride, and cinnamic acid.

[0039] Prepared by:

[0040] A. Add air-drying resin and solvent, stir to dissolve and heat up to 110°C;

[0041] B. Add 8 parts of the mixture of acrylic carboxyl monomer, acrylic hydroxyl monomer, other acrylic monomers and initiator at a uniform speed for 3h. After dropping, add 0.5 part of initiator and continue the reaction for 1h;

[0042] C. Cool down to 80°C, add neutralizer and drier, and disperse in deionized water to obtain a low-solvent hydroxyacrylic acid dispersion.

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Abstract

The invention discloses a hydroxyl acrylic acid dispersion and a synthetic method thereof, and belongs to the technical field of coatings. The hydroxyl acrylic acid dispersion comprises the followingcomponents in parts by weight: 7-25 parts of air drying type resin, 1-6 parts of an acrylic carboxyl monomer, 6-12 parts of an acrylic hydroxyl monomer, 50-70 parts of other acrylic monomers, 1-10.5 parts of an initiator, 1-3 parts of a solvent, 3-6 parts of a neutralizing agent, 1-3 parts of a drier, and 100-200 parts of deionized water. The invention also disclosed the synthetic method of the above hydroxyl acrylic acid dispersion. The hydroxyl acrylic acid dispersion disclosed by the invention has a content of the solvent of 0.5-1%, and the content is far lower than that of a similar hydroxyl acrylic acid dispersion; and the synthetic method disclosed by the invention is simple and easy to operate, and can obtain the hydroxyl acrylic acid dispersion with a low content of solvent.

Description

technical field [0001] The invention belongs to the technical field of coatings, and relates to a hydroxyacrylic acid dispersion used in coatings and a synthesis method thereof. The hydroxyacrylic acid dispersion of the invention is stable, can realize thick coating and reduce the amount of solvent. Background technique [0002] Water-based acrylic resins are generally divided into two categories: acrylic emulsions and acrylic dispersions. Acrylic emulsions have low VOC content, are simple to prepare, and meet current environmental protection requirements. They are widely used in architectural coatings, but have certain requirements in industrial fields with high performance requirements. The limitation of acrylic emulsion is that a certain amount of emulsifier is added during the synthesis process of acrylic emulsion, and these emulsifiers remain in the coating, which will reduce the gloss, water resistance and colorability of the coating. The acrylic dispersion is synthes...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F222/06C08F220/06C08F220/14C08F220/20C08F212/08C08F220/18C09D175/04
CPCC09D175/04C08F283/06C08F220/1804C08F220/18
Inventor 田海水杨永全张增飞马志明
Owner GUANGDONG HENGGUANG CHEM CO LTD
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