FIELD: chemistry.
SUBSTANCE: glass-like blocks contain 25-50 mol % alpha-methylstyrene and have glass transition temperature ranging from 120 to 140°C. Polymerisation is carried out at temperature from 35 to 60°C, and relatively high content of solid substance while continuously adding styrene, which leads to high degree of conversion of alpha-methylstyrene. The invention also describes elastomeric compositions with high operating temperature, containing a block-copolymer and an olefin polymer or a copolymer, a selectively hydrogenated elastomeric block-copolymer and an article made therefrom, which is a film, fibre, nonwoven film or multilayer sheet.
EFFECT: improved characteristics.
25 cl, 1 dwg, 9 tbl, 9 ex
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