Patent ID: 7491434
Filing Date: 2009-02-17
Classification: B32B,C08F,C08L,C09J,Y10T

Abstract:
1. A pressure sensitive adhesive article comprising: a backing having first and second major surfaces; and a pressure sensitive adhesive on at least a portion of at least one of the major surfaces of said backing, at least one of said backing and said adhesive has a rubber phase and comprises: wherein said polymodal asymmetric elastomeric block copolymer has the formula Q n Y and comprises from about 4 to about 40 percent by weight of a polymerized monovinyl aromatic compound and from about 96 to about 60 percent by weight of polymerized conjugated diene, wherein: Q represents an individual arm of said block copolymer and has the formula S-B; n represents the number of arms Q in said block copolymer and is a whole number of at least 3; and Y is the residue of a multifunctional coupling agent; and further wherein: wherein when said adhesive comprises said block copolymer, wherein said adhesive comprises a foam having at least one substantially smooth major surface having an Ra value less than about 75 micrometers, as measured by laser triangulation profilometry, and said foam comprises a plurality of microspheres, at least one of which is an at least partially expanded expandable polymeric microsphere.