RUBBER COMPOUND Russian patent published in 2022 - IPC C08L9/00 C08L9/02 C08L11/00 C08L13/00 C08L33/02 C08K3/06 C08K5/372 C08K5/09 C08K5/521 C08K5/3435 C08K5/20 C08K7/02 

FIELD: rubber industry.

SUBSTANCE: invention relates to the rubber industry, in particular to the production of elastomeric materials for sealing purposes, and can be used for sealing elements as part of water-swellable packers used in the oil and gas industry. Rubber compound for water-swelling sealing elements consists of components, wt.pts.: butadiene-nitrile rubber with an acrylic acid nitrile content of 17-20% 17.0-23.0, chloroprene rubber 36.0-42.0, acrylate rubber AR22 19.0-23.0, butadiene rubber SKD 18.0-22.0, polyisobutylene P-200 8,0-10,0 , sulfur 1,2-1,7, 2,2'- dibenztiazoldisulfide 1,5-2,0, diphenylguanidine 0,8-1,2, zinc oxide 3.0-4.0, magnesium oxide 4.0-5.0, acetonanyl N 1.5-2.0, carbon black Π 514 28.0-33.0, fiber "Extelint" 9.5-10.5, paraffin 4.0-5.0, technological additive CD-12 1,5-2,0 , trichloroethyl phosphate 18.0-20.0, household soap 2.0-3.0, acrylamide 27.0-32.0, sodium polyacrylate 38,0-43,0.

EFFECT: ensuring good swelling ability both in distilled and reservoir (10% aqueous solution of sodium chloride NaCl) water, including at high temperatures (up to 90°C), expanding the arsenal of tools for this purpose.

1 cl, 2 tbl, 4 ex