RUBBER COMPOUND BASED ON BUTYL RUBBER Russian patent published in 2023 - IPC C08K3/04 C08K5/1539 C08L9/00 C08K3/22 C08K5/09 

FIELD: rubber industry.

SUBSTANCE: invention relates in particular to rubber compounds based on butyl rubber for manufacturing of diaphragms of shaper vulcanizers. The rubber compound based on butyl rubber includes ingredients in the following ratio, in parts by weight: butyl rubber BK-1675 100, ethylene propylene diene rubber with a viscosity of 40 Mooney units at 100°C 5÷10, halogenated butyl rubber 4÷10, octyl-phenol resole resin SP 1045 H 6÷8, zinc oxide 3÷5, stearic acid 1.5÷3, carbon black N330 or N550 40÷50, phthalic anhydride 0÷0.5, rubber SKTN brand A 2÷4.

EFFECT: reducing viscosity of the rubber mixture and improving the dynamic endurance after thermal aging of rubber from this rubber mixture.

1 cl, 4 tbl, 2 ex