FIELD: chemistry.
SUBSTANCE: rubber mixture for making moulded articles contains a peroxide curable butyl rubber composition prepared from a butyl rubber polymer, a polybutadiene rubber polymer with 70-95% vinyl groups in a 1,2-microstructure, a ternary ethylene-propylene-diene copolymer with weight ratio of ethylene links to propylene ranging from 40:60 to 65:35 and 1-10 parts of peroxide curing agent per 100 parts of the rubber mixture.
EFFECT: disclosed rubber articles have high Shore hardness, good extension and low gas and moisture permeability.
11 cl, 2 dwg, 2 tbl, 4 ex
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