ACID-ACTIVATED RUBBER MIXTURE FOR MAKING WATER-SWELLABLE RUBBER ARTICLES Russian patent published in 2024 - IPC C08L9/02 C08L29/02 C08L101/14 

FIELD: chemistry; oil, gas and coke-chemical industry.

SUBSTANCE: present invention relates to the field of elastomeric materials used in oil production for isolation of formations and reduction of water content of oil and gas condensate wells. Described is an acid-activated rubber mixture for making water-swellable rubber articles based on hydrogenated butadiene-nitrile rubber, containing a vulcanising system and process additives, characterized by that the rubber mixture additionally contains a hydrolysable organic polymer compound in amount of 20.00–50.00 wt.pts. per 100 wt.pts. rubber and at least one polymer alcohol in amount of 10.00–30.00 wt.pts. per 100 wt.pts. rubber.

EFFECT: obtaining a rubber mixture, from which articles are made, having high rate and degree of swelling in the presence of acids, as well as stability under conditions of high concentrations of acids.

8 cl, 7 dwg, 3 tbl, 5 ex