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US 9,556,358 B2Granted
Coated metallic article
AssigneeEvonik Degussa GmbH
InventorsJan Berger, Klaus Gahlmann, Harald Haeger, Markus Hartmann, Jasmin Nitsche
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Abstract
A method for coating of a metallic article is provided. According to the method, the metal surface is coated with a composition which comprises a polymer or comprises a two-component system that reacts to form a polymer following application to the metal surface. The composition comprises 70-2700 meq/kg olefinic double bonds which leads to stronger adhesion and to increased corrosion resistance.
Claims7
A metallic article, comprising:
- a surface;
- and
- a coating applied to the surface,
- wherein
- the coating comprises at least one component having an olefinic double bond selected from the group consisting of:
- a polyamide which comprises polymerized ethylenically unsaturated dicarboxylic monomer units, a polyurethane which comprises polymerized ethylenically unsaturated dicarboxylic monomer units, and
- an unsaturated compound having a number average molecular weight (Mn) of 38,000 g/mol or less as determined by vapour pressure osmometry selected from the group consisting of a polyalkenylene, an ester of an unsaturated carboxylic acid, and an ester of an unsaturated alcohol, and
- a content of olefinic double bonds in the coating is from 70-2700 meq/kg of the coating.
5 more elements
Dependencies are inferred from the claim text.