FIELD: chemistry.
SUBSTANCE: invention relates to rubber industry, in particular to production of elastomer materials for sealing purposes, and can be used for inner 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 %, butadiene-methylstyrene rubber SKMS-30ARK, butadiene rubber SKD, Savilen 11808-340, sulfur, 2,2'-dibenzothiazole disulphide, Guanide F, zinc oxide, stearic acid, acetonanil H, technical carbon P 514, Rosil 175, talc, finely powdered mineral powder of schungite, colophony, polyacrylamide AK 639, reagent "Comet-R" and sodium salt of polyacrylic acid PAN-1.
EFFECT: improvement of relative elongation at rupture of rubber and increase of degree of volumetric swelling in mixture of oil and water (1:1 wt%).
1 cl, 2 tbl
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Authors
Dates
2019-05-21—Published
2018-09-12—Filed