Nitrile rubber and preparation method thereof

Abstract

The invention relates to a nitrile rubber and a preparation method thereof. The nitrile rubber is prepared from the following polymerization monomers by mass percent: 50-78% of C4-C5 aliphatic conjugate diene monomer, 20-48% of vinyl nitrile monomer and 1.0-5.0% of unsaturated amine or phenolic antioxidant monomer. By adopting a low-temperature polymerization way, an organic peroxide rongalite is used for oxidizing and reducing an initiating system, by increasing the addition of an emulsion system and a molecular weight regulator, the polymerization reaction is carried out smoothly, and molecular parameters of a polymer can be effectively regulated. The preparation method is simple in process and high in polymerization rate, and improves the stability of mucilage in the polymerization process. The content of N-(p-anilino phenyl) unsaturated amide or imide in the polymer is higher, and effective copolymerization of an antiager monomer of the N-(p-anilino phenyl) unsaturated amide or imide and C4-C5 aliphatic conjugate dienes and cyanoethylene is realized.

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