Three-layer metal pipe coating composition and process for...

Details Three-layer metal pipe coating composition and process for... Three-layer metal pipe coating composition and process for...

B - Operations, Transporting

32

B

B32B 1/08 (2006.01) B05D 7/00 (2006.01) B05D 7/14 (2006.01) C09D 163/04 (2006.01) F16L 58/10 (2006.01)

Patent

CA 2158657

Three-layer metal pipe coating compositions and process for the exterior coating of metal pipes by a three-layer method The invention relates to three-layer metal pipe coating compositions based on a powder primer, on a thermoplastic hard adhesive and on a polyolefin cladding. The powder primer contains epoxidized novolak resins, phenolic crosslinking agents and fillers based on crystalline silicic acid modifications. The invention likewise relates to a process for the exterior coating of metal pipes by a three-layer method, in which the powder primer described is applied to the metal pipe, a thermoplastic hard adhesive is applied to the powder primer, and subsequently a polyolefin cladding is applied.

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