Polyacrylate emulsion adhesive and preparation method thereof

Abstract

The invention provides a polyacrylate emulsion adhesive. The polyacrylate emulsion adhesive is prepared from 100 parts by weight of a polymerized monomer, 0.1 to 0.3 parts by weight of a polymerization regulator, 140 to 160 parts by weight of water, 0.37 to 0.75 parts by weight of a reactive emulsifier, 0.37 to 0.75 parts by weight of a nonionic emulsifier, 0.3 to 0.8 parts by weight of an initiator, 1 to 5 parts by weight of gamma-glycidoxypropyltrimethoxysilane and 0.5 to 1 part by weight of a stabilizer. The reactive emulsifier is ammonium 1-allyloxy-3-(4-nonylphenol)-2-propanol polyoxyethylene (10) ether sulfate. The nonionic emulsifier is an APEO-containing nonionic emulsifier. Through synergism of the gamma-glycidoxypropyltrimethoxysilane, reactive emulsifier and nonionic emulsifier, the polyacrylate emulsion has high stability. The emulsion particles have uniform sizes, regular shapes, good alkali resistance, organic solvent resistance and water resistance.

Description

technical field [0001] The invention relates to the field of polymer material synthesis, and more specifically relates to a polyacrylate emulsion adhesive and a preparation method thereof. Background technique [0002] my country is one of the earliest countries where humans discovered and used natural adhesives. With the development of modern industry and the improvement of people's living standards, adhesives have been widely used in various fields. At present, the application range of adhesives has been expanded from the field of wood processing to the construction industry, paper products and packaging, automobiles, electronics, and even aerospace, medical and health fields. This also makes the quality and performance requirements of adhesives increasingly stringent in all walks of life. [0003] Polyacrylate emulsion adhesives have the advantages of excellent performance, wide range of uses, low price, and environmental friendliness, which makes its application expandi...

AI Technical Summary

Problems solved by technology

Polyacrylate emulsion adhesives in the prior art are usually prepared by emulsion polymerization, because in the traditional emulsion polymerization process, small molecule emulsifiers will migrate to the surface of the film over time and absorb water, resulting in adhesion of the film , whitening, foaming or even falling off. Therefore, in recent years, more and more researchers have modified polyacrylate emulsion adhesives by introducing silicon-containing and fluorine-containing functional monomers or polyurethane and other polymers, thereby improving product quality. For example, the Chinese patent with the publication number CN103045113A discloses a preparation method of a self-crosslinking interpenetrating network type silicone-acrylate copolymer emulsion pressure-sensitive adhesive, which has achieved a good modification effect

[0004] However, the polyacrylate emulsion adhesives in the prior art still have defects in alkali resistance and chemical stability, and cannot meet the applications in some special fields requiring high alkali resistance and chemical stability.

Moreover, researchers have also made slow progress in improving the alkali resistance and chemical stability of polyacrylate emulsion adhesives.

For example, the Chinese patent with publication number CN104804118A reports a method for preparing a high solid content and strong alkali-resistant acrylate emulsion adhesive, which combines some functionalized monomers with crosslinking effects with pure styrene-acrylic emulsion. Functionalized styrene-acrylic emulsion can improve the alkali resistance and water resistance by increasing the cross-linking density, but the improvement is not large, and the polymerization stability, monomer conversion rate and comprehensive performance of the emulsion are not improved. Big

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