Abstract: A case or cover for a hard bound book is formed by bonding the formed by bonding the cover boards to the book cover stock using a hot melt pressure sensitive adhesive composition comprising:(a) 20 to 35% by weight of an A-B-A block or A-B-A-B-A-B multi-block copolymer where the A component is styrene and the B component is butadiene or hydrogenated butadiene and the copolymer contains at least 28 parts styrene per 100 parts copolymer;(b) 45 to 70% by weight of a compatible tackifying resin;(c) 5 to 30% by weight of a plasticizing oil;(d) 0 to 5% by weight of a petroleum derived wax; and(e) 0.1 to 2% by weight of a stabilizer.
Type:
Grant
Filed:
February 19, 1986
Date of Patent:
February 2, 1988
Assignee:
National Starch and Chemical Corporation