| 摘要 |
A composition which comprises a mixture of (a) an unvulcanized elastomeric block copolymer having the general configuration A - B - A, where A is a non-elastomeric styrene polymer block and B is an elastomeric diene polymer block of 1,3-butadiene and (b) a tackifying resin containing carbon-to-carbon unsaturation, characterized by having a softening point of about 60 DEG C. to about 110 DEG C. and comprising about 30 to about 55 weight percent units derived from piperylene, about 20 to about 45 weight percent units derived from 2-methyl-2-butene, about 15 to about 30 weight percent units derived from dicyclopentadiene and about 20 to about 35 weight percent units derived from alpha -methyl styrene. The composition has particular utility as a pressure-sensitive adhesive.
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