A method of Preparation carboxyl nitrile rubber emulsion

The present invention relates to a process for preparing carboxylated nitrile rubber emulsion polymerization employed. By the portionwise addition of emulsifiers, conditioning agents different timings and adding a crosslinking agent, a titanate Precrosslinker such carboxylated nitrile rubber of high microgel content, low gel content, acid index in conjunction with controlled during processing shape structure of three-dimensional network is easily formed, carboxyl groups uniformly distributed over the molecular chain, the structure is formed in the vulcanization and processing of relatively uniform product during stress relaxation slightly, so the good dimensional stability of the article. Where the application of the present invention obtained rubber products physical and mechanical properties, enhance the Mooney viscosity, the product of the compression permanent deformation, Shore A hardness, tear strength, tensile strength, elongation at break, 100% modulus ratio Common carboxy rubber increased accordingly.