Patent ID: 7445831
Filing Date: 2008-11-04
Classification: A61F,B32B,C08F,C08L,Y10T

Abstract:
1. A melt-blended radiation-curable material comprising: (a) from about 20 to about 80 wt % of a thermoplastic elastomer (TPE) which is a block copolymer having at least one hard block comprising vinylarenes and at least one soft block comprising dienes; (b) from about 5 to about 60 wt % of a processing oil; and (c) from about 5 to about 60 wt % of a macro photoinitiator having a number average molecular weight of from about 5,000 to about 300,000, wherein the macro photoinitiator is selected from the group consisting of: wherein, after curing, the material has a stress relaxation of less than about 20 percent after 200% elongation at room temperature and a stress relaxation of less than about 45 percent after about 10 hours at 100° F. and 50% elongation.