COPOLYMERS OF ACRYL ESTERS, VINYL ACETATE AND ETHYLENE, PROCESS FOR THEIR PREPARATION AND THEIR USE AS ADHESIVES

摘要

A copolymer having good properties for use as a pressure-sensitive adhesive from an aqueous dispersion comprising: (a) from 10% to 30% by weight of ethylene units, (b) from 29% to 69% by weight of acrylic ester units, (c) from 20% to 55% by weight of vinyl acetate units, (d) from 0.2% to 8% by weight of (meth)acrylamide units, and (e) from 0 to 12% of other olefinically-unsaturated monomer units copolymerizable with the above, said copolymer having a glass transition temperature of from -20 DEG C. to -60 DEG C. and a K-value according to Fikentscher, measured in tetrahydrofuran, of from 50 to 180; as well as processes to make the same and aqueous dispersions of the same for use as pressure-sensitive adhesives.