Characteristics and uses of styrene-acrylic emulsion

Styrene and acrylate copolymer emulsion paint, also known as styrene-acrylic emulsion paint, is a styrene-modified acrylate copolymer emulsion paint. It uses styrene to partially or completely replace the methacrylic acid in the pure acrylic emulsion. Methyl ester. Due to the introduction of styrene segments in the copolymer, the water resistance, alkali resistance, hardness, stain resistance and chalking resistance of the coating film can be improved. Styrene-acrylic emulsion is milky white liquid with blue light. The solid content is 40-45%, the viscosity is 80-1500mPa·s, the monomer residue is 0.5%, and the pH value is 8-9. Styrene-acrylic emulsion has good adhesion, transparent film, good water resistance, oil resistance, heat resistance, and aging resistance. It can be used as a paper adhesive, and can also be used in conjunction with adhesives such as starch, polyvinyl alcohol, and sodium carboxymethyl cellulose. Stored in a warehouse at 5-30 ℃, the storage period is generally 1 year.

This kind of coating has gloss retention, color retention, outdoor durability, stain resistance, and high bonding strength to fillers; high gloss emulsion coatings can be formulated; its cost is lower than that of pure acrylic emulsion coatings. This kind of coating can be used for the coating of cement mortar, mortar mortar, wood and concrete substrates. It can also be used for the preparation of mortar spray paint and cement-based coatings, which are widely used as exterior wall coatings. This type of coating has various uses and occupies a large proportion of the total output of emulsion coatings. It is a type of emulsion coating with a promising future.

Especially in recent years, it has been used as a water-based anti-rust latex coating. It has the advantages of non-toxic, odorless, non-combustible, less pollution, weathering resistance, light aging resistance, chemical corrosion resistance, and adjustable gloss. It overcomes the flammability of oil-based anti-rust coatings. , Explosive, toxic, and serious environmental pollution, and by adding a small amount of functional monomers (accounting for less than 3% of the total monomers), choosing different types and proportions of emulsifiers, especially for particle design, such as The shell and core composition design and polymerization process can make it have certain specific properties, which can be used for some different special purposes. As a styrene-acrylic emulsion used as a coating film-forming material, although it has been developed and produced at home and abroad, it has been developed and produced for a long time. Compared with actual application requirements, there are still some problems, especially there is still a considerable gap with foreign excellent varieties.