HIGHLY STRETCHABLE VULCANIZED RUBBER

摘要

PROBLEM TO BE SOLVED: To provide a highly stretchable vulcanized rubber consisting essentially of an ethylene-α-olefinic copolymer rubber, imparting pressure-sensitive adhesion by compounding a specific pressure-sensitive adhesion imparting agent and having excellent breaking elongation even in a high-hardness region. SOLUTION: The highly stretchable vulcanized rubber is obtained by vulcanizing a rubber composition containing at least the following components (A) and (B) and has≥65 hardness measured according to JIS K6253 and≥200% breaking elongation measured according to JIS K6251. (A) an ethylene-α-olefinic copolymer rubber and (B) a rosin-containing compound having 90-120°C softening temperature and 90-120 acid value. The highly stretchable vulcanized rubber having≥80 hardness measured according to the JIS K6253 and≥300% breaking elongation measured according to the JIS K6251 can be cited as a preferred embodiment. COPYRIGHT: (C)2005,JPO&NCIPI