LAMINATES OF CHLORINATED LOW UNSATURATED RUBBERS AND HIGHLY UNSATURATED RUBBERS,METHOD OF MAKING SAME AND BLENDS OF SUCH RUBBERS

摘要

A curable rubbery composition comprises a blend of a vulcanizable low unsaturated halogenated rubber with an unvulcanized high unsaturated rubber, the low unsaturated halogenated rubber having been compounded with 1 to 50 parts of zinc oxide, zinc peroxide or cuprous oxide and 0.1 to 15 parts of a quinone, both parts being per 100 parts rubber. By "quinone" is meant (1) p-benzoquinone, (2) 1,4-naphthoquinone, (3) 9,10-anthraquinone and products of these compounds in which the carbonyl group remains intact and unchanged. Specified low unsaturated rubbers are butyl rubber and ethylenepropylene-diene terpolymers while natural rubber, polyisoprene, butadiene-styrene rubber, butadiene-acrylonitrile rubber and polybutadiene are specified high unsaturated rubbers; a blend of 50/50 natural rubber/butadiene-styrene rubber may also be used. There may be present in the compounded rubbers a filler, e.g. clay, silica, silica-alumina or carbon black as well as other usual compounding and vulcanizing agents. The compositions when used as cements will also contain solvents.