RUBBER MIXTURE Russian patent published in 2019 - IPC C08L9/00 C08L9/02 C08L31/04 C08L33/02 C08L33/26 C08K3/04 C08K3/06 C08K3/22 C08K3/36 C08K5/09 C08K5/31 C08K5/3437 C08K5/47 C08K7/02 

FIELD: technological processes.

SUBSTANCE: invention relates to rubber industry, in particular to production of elastomeric materials for sealing purposes, and can be used for outer layer of sealing elements in water-oil-swellable packers used in oil and gas industry. Rubber mixture contains butadiene-nitrile rubber with nitrile of acrylic acid content of 17–20 %, isoprene rubber SKI-3, butadiene rubber SKD, sevilen 11808-340, sulfur, 2,2'-dibenzthiazole disulphide, guanide F, zinc white, stearic acid, acetonyl H, carbon black P 514, rosil 175, talc, finely powdered mineral powder of schungite, colophony, needle-felt fabric "Oxipan", polyacrylamide AK 639, reagent "Comet-R" and sodium salt of polyacrylic acid PAN-1.

EFFECT: invention improves relative elongation at rupture of rubber and increases degree of its volumetric swelling in mixture of oil and water 1:1 by weight.

1 cl, 2 tbl