C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/2055, 117/31
C08L 53/02 (2006.01) A61L 15/58 (2006.01) C09J 153/02 (2006.01)
Patent
CA 1235542
ABSTRACT A hot melt pressure sensitive adhesive composition is provided comprising an A-B-A- block co- polymer wherein the B midblock comprises polyolefins and the A endblock comprises polystyrene and having a number average molecular weight of the individual A blocks of from about 7,000 to about 30,000. The com- position also comprises a tackifying resin present in the proportions of from about 200 to about 300 parts by weight per 100 parts by weight of the block copolymer; a plasticizer present in the proportions of from about 80 to about 150 parts by weight per 100 parts by weight of said block copolymer; the block copolymer, tackify- ing resin, and plasticizer, being chosen and being present in the proportions such that the adhesive com- position exhibits critical rheological properties which manifest themselves into the desired performance criteria of tenacious bonding and clean release.
435282
Chen Franklin M.c.
Jones Archie L.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Personal Products Company
LandOfFree
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