Process for repairing plastic coatings on metal tubing

Details Process for repairing plastic coatings on metal tubing Process for repairing plastic coatings on metal tubing

B - Operations, Transporting

29

C

117/31, 117/7, 1

B29C 73/10 (2006.01) B05D 5/00 (2006.01) B05D 7/14 (2006.01) B29C 73/02 (2006.01) C09D 123/10 (2006.01) C09J 123/10 (2006.01) F16L 55/17 (2006.01) F16L 55/175 (2006.01) F16L 55/18 (2006.01) B05D 3/02 (2006.01)

Patent

CA 2035504

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: A) from 59% to 94% of polypropylene, propylene/ethylene random copolymer, propylene/ethylene/l-butane 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; B) from 5% to 40% of a polymer or a mixture of elastomeric polymers selected from the group consisting of EPR, EPDM, SEBS block copolymer, SBS block copolymers and ethylene/ethyl acrylate copolymer; C) from 1% to 10% of polypropylene modified with from 1 to 10% of maleic anhydride, isophorone bismaleamic acid or acrylic acid; and D) from 0% to 3% of carbon black.

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