COMPOUNDED RUBBER BASED ON BUTADIENE-NITRILE RUBBER Russian patent published in 1999 - IPC

FIELD: rubber industry. SUBSTANCE: invention, in particular, relates to development of wear-resistant rubbers for manufacturing sealing parts used in mobile assemblies of mechanisms. Rubber mixture based on butadiene- nitrile rubber with acrylonitrile content 17-23 wt % and containing, wt %: sulfur 2.45-2.65, zinc oxide 7.40-7.60, carbon black with specific geometric surface 12-18 sq.m/g 128-132, and stearic acid 0.80-0.20, is distinguished by supplementary containing, wt %: N,N'-diphenylguanidine 0.20-0.30, di(2-benzothiazolyl) disulfide 2.60-2.80, alpha- naphthylamine aldol 3.80-4.20, N-(4-hydroxyphenyl)-2-naphthylamine 0.90-1.10, N-(1,3-dimethylbutyl)-1,4-phenylenediamine 0.80-1.20, dibutyl phthalate 18.0-22.0, and diamond-containing superdispersed powder. EFFECT: improved resilient-elastic characteristics and preserved high frost resistance and hardness and low residual compression deformation after heat ageing. 2 tbl