Three-layer metal pipe coating compositions and process for the exterior coating or metal pipes by a three-layer method
AssigneeBASF Coatings GmbH
InventorsWerner Blömer, Udo Reiter, Josef Rademacher
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Abstract
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.
Claims13
A three-layer metal pipe coating composition comprising a first layer that is applied to the pipe and is a powder primer, a second layer that is a thermoplastic hard adhesive, and a third, outer layer that is a polyolefin cladding, wherein the powder primer contains epoxidized novolak resins, phenolic crosslinking agents, and crystalline silicic acid modifications.
A process for the exterior coating of metal pipes by a three-layer method, comprising applying a powder primer to a metal pipe, applying a thermoplastic hard adhesive to the powder primer, and subsequently applying a polyolefin cladding, wherein the powder primer contains epoxidized novolak resins, phenolic crosslinking agents, and crystalline silicic acid modifications.
Dependencies are inferred from the claim text.