Abstract: A multi-part rubber compound comprising: (1) a first compound comprising an elastomer (1)(a) and a vulcanizing agent, and having a ts2 of at least 1.5 minutes; (2) a second compound comprising an elastomer (2)(a) and a cure accelerator, and having a ts2 of at least 1.5 minutes; and (3) one or more optional compound comprising an elastomer (3)(a) and having a ts2 of at least 1.5 minutes; wherein: at least one of (1)(a), (2)(a) and (3)(a) has a Mooney viscosity of 20-75 measured at 100° C. (ASTM D1646), the first, second and optional compounds are kept separate until the multi-part compound is used, a blend of equal volumes of the first and second compounds, optionally with an equal volume of the optional compound, has a ts2 of less than 0.7 minutes, ts2 being measured at 190° C.

Abstract: A fast curing vulcanizable multi-part rubber compound comprising: (1) a first rubber compound comprising: (a) an elastomer, and (b) at least one vulcanizing agent, this first rubber compound having a ts2 value of at least 1.5 minutes when measured at 190° C.; (2) a second rubber compound comprising: (a) an elastomer, and (b) at least one cure accelerator, this second rubber compound having a ts2 value of at least 1.5 minutes when measured at 190° C.; and (3) one or more optional additional rubber compound comprising (a) at least one elastomer, this optional additional rubber compound having a ts2 value of at least 1.5 minutes when measured at 190° C.; wherein: at least one elastomer selected from the group consisting of the elastomer (1)(a), the elastomer (2)(a) and the elastomer (3)(a) has a Mooney viscosity in the range of 20-75, preferably 20-50, and more preferably 30-50, as measured at 100° C.

Abstract: Blends of a polyacrylate elastomer with a partially hydrogenated rubber, when peroxide-cured, provide a product which is excellent in resistance to degradation by heat or contact with oil, and which is particularly suitable for making belts, hoses, gaskets and the like for use in automobile engines.

Abstract: A polyacrylate made from a monomer mixture containing alkyl acrylates and optionally ethylene, propylene, and acrylonitrile, and/or an alkoxyl alkyl or alkythioalkyl acrylate is cured with 1,1-bis(t-butylperoxy)-3,3,5-trimethylcyclohexane and m-phenylenediamine maleimide.