Acrylic adhesives are a class of adhesives with unique […]
Acrylic adhesives are a class of adhesives with unique properties and a wide range of applications. According to the form and application characteristics of the adhesive, it can be divided into solvent type, emulsion type, reactive type, pressure sensitive type, instantaneous dry type, anaerobic type, photosensitive type and hot melt type. It is easy to see from this classification that the application range of the two-acid acid adhesive is very wide, and it can be said that all metal non-metal materials can be bonded with an acrylic adhesive. Among them, pressure-sensitive adhesives, anaerobic adhesives, photosensitive adhesives, hot melt adhesives, etc., have basically been self-contained. The following mainly describes solvent-based, emulsion-type, reactive acrylic and a-cyanoacrylate adhesives.
Acrylic emulsion adhesive can be used in non-woven fabrics, fabrics, planting lines, polyurethane foams, composite films, carpet backings, etc. It can also be used in construction as a masonry adhesive, decorative adhesive and sealant. The composition of the emulsion polymerization of the acrylate includes a monomer, water, an initiator, an emulsifier, a buffer, a protective colloid, and the like. The initiator may be a peroxide system or a redox system. Emulsifiers include anionic and nonionic emulsifiers. The buffer is a non-acid salt such as sodium bicarbonate added to maintain the pH. Representative protective colloids include polyvinyl alcohol, methyl cellulose, and the like.