POLYMER COMPOSITION FOR PARTICULARLY DIFFICULT OPERATING CONDITIONS Russian patent published in 2019 - IPC C08L9/00 C08L9/06 C08L23/08 C08K13/02 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to production of industrial rubber articles which are used in conditions of high mechanical loads and friction, aggressive media and difficult climatic conditions, and can be used for making sealing devices of movable and fixed connections such as rings, collars, membranes used, for example, in braking systems of railway rolling stock. Polymer composition contains butadiene-nitrile rubber, butadiene-methylstyrene rubber SKMS-30 AKRM-15, ethylene-propylene-diene rubber SKEPT-50, ethylene-propylene rubber SKEP-40, copolymer of ethylene with vinyl acetate, content of vinyl acetate 18–33 %, dioctyl phthalate, dibutyl sebacate, dibutyl phthalate, triphenyl phosphate, technical carbon, sulfur, thiuram D, dithiomorpholine, sulfenamide, captax, zinc oxide, magnesium oxide, stearic acid and zinc stearate.

EFFECT: invention increases absolute value of limit of brittleness of composition, high frost resistance, resistance to action of lubricating fluids and deformation-strength parameters.

1 cl, 7 ex, 2 tbl