VINYL-FUNCTIONAL RESIN, POLYMER HAVING CHAIN TERMINATED WITH SINGLE VIYL, AND IMPROVED THERMALLY CURABLE ELASTOMER COMPOSITION MAINLY COMPRISING POLYMER HAVING VINYL ON ITS CHAIN

摘要

PURPOSE: To provide a thermally curable elastomeric silicone rubber compsn. which, when thermally cured, exhibits a tear strength higher than 200, a compression set lower than 20%, a high tensile strength, and good resistances to heat aging and an oil. ;CONSTITUTION: A siloxane gum having vinyl groups on its chain in added to a blend comprising 1) a vinyl-terminated organopolysiloxane gum, 2) a silica filler, 3) an MQ resin or an M-D vinyl-M resin or a mixture thereof, and 4) a crosslinking agent, thus giving a silicone elastomer thermally curable in the presence of a peroxide catalyst.;COPYRIGHT: (C)1994,JPO