A kind of preparation technology of anticorrosion water-based acrylic acid emulsion

Abstract

The invention discloses a process for preparing an anti-corrosion waterborne acrylic emulsion, and belongs to the field of waterborne industrial paint coatings. The process comprises the following steps: (1) pre-preparing a monomer emulsion, namely, sequentially adding 100-150 parts of water, 2-8 parts of an emulsifier containing polymerizable phosphate, 50-150 parts of styrene, 10-50 parts of n-butyl acrylate, 50-200 parts of iso-octyl acrylate, 20-100 parts of methyl methacrylate, 2-10 parts of methacrylic acid and 0-50 parts of acrylonitrile into a first emulsified liquid reaction kettle, and performing stirring for 1-3 hours so as to obtain the monomer emulsion for later use; (2) pre-preparing an initiator, namely, dissolving ammonium persulfate into 30-50 parts of water, and performing stirring so as to obtain an initialize solution for later use; and (3) performing synthesis, namely, performing a synthesis process of temperature-variable polymerization. Overall performance evaluation shows that the prepared anti-corrosion waterborne acrylic emulsion is excellent in comprehensive properties, and outstanding in water resistance, salt mist resistance and adhesion properties.

Description

Technical field [0001] The invention belongs to the technical field of water-based industrial paint coatings, and relates to a preparation process of an anticorrosive water-based acrylic emulsion. Background technique [0002] In recent years, the number of steel scraps caused by corrosion and rust has increased every year, which has brought irreversible losses to the economy. The problem of metal corrosion has also seriously affected the natural environment, energy and human health. Therefore, the research on steel corrosion prevention is of great significance. In the world, due to the constraints of resources and environmental protection, more and more anti-corrosion coatings are becoming water-based. In my country, the demand for water-based coatings is also increasing year by year. [0003] In the practical application of water-based industrial paint, salt spray resistance and adhesion to metal substrates are two very important properties. The level of salt spray resistance ...

AI Technical Summary

Problems solved by technology

[0004] The acrylic emulsion synthesized by conventional methods has a single structure, and often the salt spray resistance and adhesion cannot be effectively combined.

In addition, after being mixed with pigments, the overall porosity of the paint film is relatively high, and it is easily attacked by other substances, resulting in a serious decline in performance