Patent ID: 8828181

Claim:
A temperature switchable adhesive composition comprising: a) at least one pressure sensitive adhesive, which does not exhibit temperature switchable properties, having a rubbery plateau between a first temperature T1 and a second temperature T2, said pressure sensitive adhesive comprising at least one elastomer selected from the group consisting of thermoplastic rubbers, natural rubbers, butyl rubbers, polyisobutylene polymers, vinyl ether polymers, ethylene/acrylic copolymers, silicone-based rubbers, and acrylics; and b) at least one crystallizable oil having a crystalline melting point between T1 and T2 in an amount of at least about 20% by weight of the composition; wherein the elastomer is an ABA block copolymer, wherein a) A is a thermoplastic polystyrene end-block; and b) B is a rubber mid-block selected from the group consisting of polyisoprene, polybutadiene, and poly(ethylene/butylene); wherein the elastomer has a thermoplastic polystyrene end-block content of about 14% to about 30% by weight of the block copolymer; and wherein if the elastomer is selected from the group consisting of thermoplastic rubbers, natural rubbers, butyl rubbers, polyisobutylene polymers, vinyl ether polymers, ethylene/acrylic copolymers, and silicone-based rubbers, the pressure sensitive adhesive further comprises at least one tackifier.