| abstract |
The present invention relates to a method for preparing a vulcanizable polymer composition with improved vulcanization time characterized by mixing a carboxylated nitrile rubber, the rubber is a copolymer of butadiene, acrylonitrile and one or more alpha, beta-unsaturated carboxylic acids chosen from acids acrylic, methacrylic, fumaric, maleic and itaconic, one or more polyvalent metal oxides and one or more alkali metal salts chosen from lithium, sodium and potassium salts of alkanoic acids with 12 to 18 carbon atoms. |