METHOD FOR PRODUCTION OF IMPACT POLYSTYRENE Russian patent published in 1996 - IPC

FIELD: production of construction materials. SUBSTANCE: mixture of polybutadiene rubber and piperylene-styrene block star-shaped copolymer (its quantity being 1-5 % of total mass) or polypiperylene-butadiene-styrene block star-shaped copolymer is affected by block suspension polymerization, said mixture being used as styrene solution. Mentioned above piperylene-styrene copolymer contains 25-42 mass % of styrene as polystyrene block having molecular weight (8-15) •10³ and 58-75 mass % of piperylene as piperylene block having molecular weight (32-40) •10³; number of beam in said copolymer is 4-9. Mentioned above polypiperylene-butadiene-styrene copolymer contains 25-35 mass % of styrene as polystyrene block having molecular weight (8-15) 10³ and 75-65 mass % of elastomer blocks which contain 34-40 % of polypiperylene and 31-40 % of butadiene, molecular weight of said copolymer is (30-40) 10³; number of beam in said copolymer being 4-9. EFFECT: improves performance of desired material. 2 tbl