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
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Authors
Dates
2019-04-24—Published
2018-09-04—Filed