C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
117/31, 403/64,
C08J 9/04 (2006.01) B32B 5/18 (2006.01) B32B 7/10 (2006.01) C08J 5/12 (2006.01) C08J 5/18 (2006.01) C09J 7/00 (2006.01) C09J 7/02 (2006.01) C09J 133/08 (2006.01) C08L 33/06 (2006.01)
Patent
CA 2031601
ABSTRACT Phase-separated, polymerized, cellular pressure- sensitive adhesive membranes possessing a high degree of compression recovery comprising from about 70 parts to about 98 parts of an acrylic polymer containing at least about 75 parts of an alkyl acrylate monomer, the alkyl groups of which have an average of 4 to 12 carbon atoms, and from 0 to about 25 parts of a monoethylenically unsaturated polar copolymerizable monomer, and corres- pondingly, from about 30 parts to about 2 parts of a saturated hydrocarbon elastomer or blend of hydrocarbon elastomers containing at least one segment having a lower glass transition temperature than the acrylic copolymer. The adhesive has at least a first phase and a second phase, the first phase consisting primarily of the elastomer, and at least one phase is a continuous phase. Cellular pressure-sensitive adhesive membranes of the invention have improved low temperature shock resistance over otherwise identical cellular pressure-sensitive adhesive membranes containing no elastomer.
Klingen Jurgen
Landin Donald T.
Vesley George F.
Minnesota Mining And Manufacturing Company
Smart & Biggar
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