Preparation method of high-performance waterborne acrylic resin

Abstract

The invention discloses a preparation method of high-performance waterborne acrylic resin. The waterborne acrylic resin is prepared from the raw materials of, by mass, 25-35 parts of unsaturated monomers containing hydroxyls, 20-40 parts of hard monomers, 20-40 parts of soft monomers, 8-15 parts of unsaturated carboxylic acid, 3-5 parts of an initiator, 0.5-2 parts of an organic silicone modifier,0.5-1.5 parts of a chain transfer agent and 80-90 parts of a solvent. The preparation method comprises the steps that colorless and transparent acrylate prepolymers with the hydroxyl content of 2.5 mmol / g and the solid content of 60+ / -1% is synthesized by solution copolymerization, and the high-performance waterborne acrylic resin is obtained through a 'salt forming method'. According to the preparation method, the organic silicone modifier is introduced to the acrylic resin to improve the water resistance, heat resistance and chemical resistance performance of the acrylic resin, a simple method, cheap raw materials which are convenient to obtain and conventional equipment are used for preparing the waterborne acrylic resin with good performance, the glossiness of a product is high, the drying speed is fast, the mechanical performance is excellent, water resistance, weather resistance and solvent resistance are good, and the coating demands of the majority of workpieces are met.

Description

Technical field [0001] The invention relates to a preparation method of high-performance water-based acrylic resin and belongs to the technical field of chemical coatings. Background technique [0002] Water-based acrylic paint has low VOC content and fast drying speed, which meets the national energy conservation and emission reduction requirements. How to maintain the excellent properties of water-based polyacrylate on the basis of environmental protection has become the main direction of current research. With the continuous development of water-based coating research, various high-performance water-based coatings are being continuously developed. [0003] The continuous expansion and deepening of research on water-based acrylic resins is accompanied by diverse synthesis processes, rich selection of raw materials, and functional and professional products. In order to improve the adhesion of paint on nylon, glass fiber and other substrates, CN 102766263 A discloses a met...

AI Technical Summary

Problems solved by technology

[0004] The current research problems of water-based acrylic resins are that many synthetic processes are too complicated and harsh, and the repeatability is poor, which affects the stability of the product. The equipment needs to be specifically improved, and the energy consumption is large, which increases the cost; many raw materials are expensive and cannot be supplied stably. It affects the normal production cycle and product supply; the products obtained are not the mainstream demand of the market, and the competitiveness is not enough