Patent ID: 7125928

Claim:
An adhesive composition comprising a copolymer of methylmethacrylate, butylmethacrylate and styrene, wherein Tg of the copolymer is 40° C. to 100° C. and the weight average molecular weight of the copolymer is 20000 to 150000, and wherein the adhesive composition is heat sensitive and allows one or more portions of a substrate to which the adhesive composition is applied to substantially avoid adherence, when the one or more portions are in overlying position with one another, and wherein the copolymer has a ratio by weight of acrylic monomer including a methylmethacrylate and a butylmethacrylate to a styrene monomer (acrylic monomer:styrene monomer) is in a range of 25 to 30:1 to 5.