BUTADIENE-NITRILE RUBBER BASED RUBBER MIXTURE Russian patent published in 2013 - IPC C08L9/02 C08K3/04 C08K5/14 C08K5/16 C08K13/02 

FIELD: chemistry.

SUBSTANCE: invention relates to rubber industry, particularly production of rubber mixtures used to make articles for various purposes, including packer elements (rubber sealers in oil or gas wells), used in production of packer and anchor equipment. The rubber mixture contains the following ingredients, pts.wt (per 100.00 pts.wt rubber): paraffinate butadiene-nitrile rubber BNKS-40 AMN 100.00, with weight content of acrylonitrile of up to 41%, dicumyl peroxide (Perkadox BC-FF) - 3.0-4.0, vulcanisation coagent Deltagran HVA 2 70 GT - 1.0-3.0, zinc oxide - 3.0-5.0, antioxidant Irganox 1010 - 2.0-3.0, oligoester acrylates TGM-3 - 6.0-10.0, active technical carbon H-220 - 50.0-70.0, technical carbon T-900 - 10.0-30.0, dispersant zincolet BB 222 1.0-3.0, anti-scorch Santogard PVI - 0.3-0.5.

EFFECT: invention improves physical and mechanical properties of the rubber mixture, processability thereof by high-pressure casting, with improved elastic-strength properties, high aggressive heat resistance and low relative compression set, operating capacity under high loads.

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