OIL-RESISTANT RUBBER COMPOSITION Russian patent published in 2015 - IPC C08L9/02 C08K3/04 C08K3/06 C08K3/22 C08K3/36 C08K5/09 C08K5/18 C08K5/40 C08K5/43 C08K5/44 

FIELD: chemistry.

SUBSTANCE: invention relates to preparation of a rubber composition based on hydrogenated butadiene-nitrile rubber with high content of acrylonitrile and low unsaturation and can be used in the rubber and industrial rubber industry to produce multilayer rubber-cord articles, used in conditions with dynamic loads, fuels and oils at high temperatures for a long period of time. The technical result is achieved by using, in the formulation of the rubber composition, a polymer base in the form of hydrogenated butadiene-nitrile rubber with high content of acrylonitrile (49-50%) and low unsaturation (5-7%), a vulcanising agent - sulphur donor in the form of N,N'-dithiodimorpholine, coupled with a dual system of high-activity vulcanisation accelerators, with the following ratio of components, pts.wt: hydrogenated butadiene-nitrile rubber with high content of acrylonitrile of 49-50% and low unsaturation (5-7%) - 100.0; ground sulphur - 0.1-0.3; technical carbon - 40.0-50.0; zinc oxide - 5.0-8.0; white soot - 5.0-20.0; plasticiser - 10.0-18.0; stearic acid - 0.5-1.5; diaphene FP-n/b 2.0; acetonanyl N - n/b 1.0; N,N'-dithiodimorpholine - 0.5-2.0; thiuram D - 0.6-1.5; sulphenamide C - 0.8-2.0. The invention increases oil and heat resistance and dynamic endurance of multilayer rubber-cord articles.

EFFECT: obtaining a rubber composition with high oil and heat resistance, high dynamic endurance, which enables rubber-cord articles to retain operational properties in aggressive media at high temperatures for a long period of time.

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