| abstract |
Disclosed is a process for repairing removed or damaged parts of plastic coating on metal tubing characterized in that the coating material or the adhesive for patches or bands is an adhesive polymer composition comprising by weight: n A) from 59% to 94% of polypropylene, propylene/ethylene random copolymer, propylene/ethylene/1-butene random copolymer or mixtures thereof with one or more plastomeric polymers selected from the group consisting of ethylene/vinyl acetate copolymers, LDPE, HDPE, polyamides and polyurethane; n B) from 5% to 40% of a polymer or a mixture of elastomeric polymers selected from the group consisting of EPR, EPDM, SEBS block copolymers, SBS block copolymers and ethylene/ethyl acrylate copolymers; n C) from 1% to 10% of polypropylene modified with from 1 to 10% of maleic anhydride, isophorone bismaleamic acid or acrylic acid; and n D) from 0% to 3% of carbon black. |