VINYL POLYMER-BASE ADHESIVE COMPOSITION AND A METHOD OF REPAIR OF METALLIC PIPE-LINE POLYMERIC COATING Russian patent published in 1995 - IPC

FIELD: repair of plastic coatings. SUBSTANCE: adhesive composition, wt. -%: static propyleneethylene copolymer containing 4 wt.-% ethylene or propyleneethylene-1-butylene copolymer containing 2 wt.-% ethylene and 5 wt.-% butylene, or their mixture with polymer taken from the group: copolymer of ethylene and vinyl acetate containing 45 wt.-% vinyl acetate, low-density polyethylene 69.23-87.35; ethylenepropylene rubber containing 44-45 wt.-% propylene 10-28; polypropylene modified with 4-5 wt.-% maleic anhydride 2.5-3.0. Composition is applied on the pipe-line metallic surface which is worked preliminary mechanically and heated up to 80 C. Cover plate, ribbon or cover plate and ribbon made of product of stereospecific propylene and ethylene copolymerization with heat shrinkage 20% and containing 8 wt.-% ethylene can be applied additionally. EFFECT: enhanced quality of adhesive. 1 tbl