CONCENTRATE OF RUBBER ACTIVE FILLER Russian patent published in 1995 - IPC

FIELD: rubber industry. SUBSTANCE: concentrate of rubber active filler used for making shock-resistant composition involves rubber as particles containing grafting copolymer of styrene and acrylonitrile (grafting coefficient is above 0.1) and continuous phase of nongrafting copolymer of styrene with acrylonitrile (intrinsic viscosity is above 0.15 dl/g) on particle surface. The source of rubber in concentrate: grafting rubber (grafting coefficient (K₁) 0.4-1.0) and nongrafting rubber (grafting coefficient (K₁) 0.4-1.0); continuous phase: copolymer of styrene and acrylonitrile with intrinsic viscosity K₁·η 0.2-0.9 dl/g, and product value η is 0.2-0.5 at the following ratio of components, wt.-% grafting rubber 60-90; copolymer of styrene and acrylonitrile 10-40. Concentrate is used for preparing and modification of shock-resistant copolymers. EFFECT: enhanced quality of concentrate. 3 tbl