Pressure sensitive adhesives preparation technology

There are four main categories of pressure sensitive adhesives used in industry:

• solvent-based pressure sensitive adhesives
• emulsion pressure sensitive adhesives
• hot melt pressure sensitive adhesives
• ray curing pressure sensitive adhesives

According to their polymer, pressure sensitive adhesives are divided into rubber pressure sensitive adhesives, polyacrylate pressure sensitive adhesives, polyethylene resin, polyurethane resin, and polyisobutene emulsion, and other emulsion types occupy an absolute advantage position. It is a key feature of pressure sensitive latex industry in our country. Pressure sensitive adhesives emulsion, especially pressure sensitive acrylic latex, plays special importance in our country.

Acrylate pressure sensitive adhesives

Acrylate pressure sensitive adhesive is currently second only to rubber, the most used pressure sensitive adhesive, it is a copolymer of acrylic monomer and another ethylene monomer, and can be roughly divided into crosslinked and non-crosslinked type two. Due to the low glass transition temperature (Tg: -20—700C) of the homopolymer, it is generally composed of flexible monomers that play the adhesive role, and hard monomers that can be endowed with adhesivity and cohesion at the high glass transition temperature, as well as a small number of monomers containing functional groups are copolymerized. The purpose of adding functional monomers is to further improve the viscosity, cohesion, and heat resistance creep of pressure-sensitive adhesives through cross-linking.