POLYMER-CONTAINING ADHESIVE PRIMER Russian patent published in 2013 - IPC F16L58/10 F16L58/12 F16L58/00 C08L95/00 

FIELD: chemistry.

SUBSTANCE: primer contains butadiene-nitrile rubber as thermoplastic, chlorinated polyvinyl chloride as a modifier, phenol-formaldehyde resin or epoxy-diane resin as an adhesive additive, ethyl acetate, toluene, isopropyl alcohol and acetone as solvents, as well as polyethylene polyamine and can contain EDOS plasticiser, bitumen and technical carbon. Components are in the following ratio, wt %: butadiene-nitrile rubber - 5.0-15.0; technical carbon - 0.0-0.5; ethyl acetate - 25.0-50.0; toluene - 5.0-25.0; polyethylene polyamine - 0.1-0.5; isopropyl alcohol -5.0-15.0; chlorinated polyvinyl chloride - 0.5-5.0; phenol-formaldehyde resin or epoxy-diane resin - 5.0-20.0; EDOS plasticiser - 0.0-5.0; acetone - 2.0-10.0; bitumen - 0.0-50.0.

EFFECT: improved protective properties of the primer due to high adhesion to the coated surface of the pipe, reliability of the coating due to high resistance to cathodic disbonding during use.

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