Method for coating light alloy rims
AssigneeBASF SE
InventorsKlaus Menzel, Erich Beck, Judith Pietschmann
Life of this patent
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Abstract
Described is a method for coating light alloy rims, coating materials for use in this method, and the coated light alloy rims obtained in this way. More specifically, described is a method for coating light alloy rims with at least three layers comprising a primer layer (A), a base coat layer (B), and a clear coat layer (C), each of which are a layer of different coating materials. The method comprises providing a substrate; applying the primer layer (A) directly to the substrate; applying the base coat (B) layer; applying the clear coat layer (C); and curing the layers of different coating materials by high-energy radiation.
Claims9
A method for coating light alloy rims with at least four layers comprising a first primer layer (A1), a second primer layer (A2), a base coat layer (B), and a clear coat layer (C), each layer being of different coating materials, the method comprising
- providing a substrate comprising a machined light alloy rim blank comprising a cast aluminum alloy;
- applying the first primer layer (A1) directly to the substrate, the first primer layer (A1) comprising at least one radiation-curable coating material having an acid number in accordance with DIN EN ISO 3682 (by potentiometry) of 10 to 120 mg KOH/g;
- applying the second primer layer (A2);
- applying the base coat layer (B);
- applying the clear coat layer (C) to the machined light alloy rim blank, the dear coat layer (C) comprising a radiation-curable clear coat layer having at least 1 mol of free-radically polymerizabie double-bond reactive groups per kg of coating material;
- and
- curing the layers of different coating materials by radiation.
Dependencies are inferred from the claim text.