Abstract: Adhesive composition comprising a blend consisting essentially of (1) an adhesive composition comprising a tacky pressure-sensitive adhesive, said adhesive preferably selected from rubber-based adhesives, e.g., the thermoplastic elastomers, and (2) a pressure-sensitive adhesive composition comprising a polymer having in its backbone at least a major portion by weight of polymerized monomeric acrylic or methacrylic acid ester of a non-tertiary alcohol having from 1 to 14 carbon atoms with the average number of carbon atoms being about 4 to about 12, and grafted to the backbone, polymeric moieties having a Tg greater than about 20.degree. C. and a weight average molecular weight above about 2,000. The pressure-sensitive adhesive of adhesive composition (1) has moieties, e.g., blocks or grafts, that associate with the polymeric moieties grafted to the backbone of the polymer of adhesive composition (2).
Type:
Grant
Filed:
May 17, 1990
Date of Patent:
September 1, 1992
Assignee:
Minnesota Mining and Manufacturing Company