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Method of producing multi-layer coatings

  • US 6,025,033 A
  • Filed: 11/05/1998
  • Issued: 02/15/2000
  • Est. Priority Date: 11/05/1997
  • Status: Expired due to Fees
First Claim
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1. A method of producing a multi-layer coating, comprising the application of a colour- and/or effect-imparting base lacquer coat of an aqueous base lacquer, the-wet-into-wet-application on to the aqueous base lacquer coat of a clear lacquer coat of a two-component polyurethane clear lacquer, which is produced shortly before the application thereof by mixing a master lacquer component, which contains hydroxy-functional binder vehicles and solvents, with a polyisocyanate component, and joint stoving of the aqueous base lacquer and clear lacquer coats, characterised in that the two-component polyurethane clear lacquer which is used contains 0.01 to 1% by weight, with respect to the clear lacquer solids, of one or more additives with a surface tension-lowering effect, wherein at least 25% by weight of the additives with a surface tension-lowering effect is contained in the polyisocyanate hardener component before mixing.

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