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Two layer protective coatings

  • US 6,312,815 B1
  • Filed: 06/12/1997
  • Issued: 11/06/2001
  • Est. Priority Date: 05/01/1992
  • Status: Expired due to Fees
First Claim
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1. A two layer protective coating for protecting a substrate comprising:

  • a primer layer formed on the substrate from a water-based primer composition obtained by mixing an acrylic copolymer and water;

    said primer layer being clear; and

    a saturated, aliphatic urethane protective topcoat formed on the primer layer by application of a topcoat composition obtained by mixing a polyol and an aliphatic polyisocyanate;

    said topcoat being clear;

    said primer layer being characterized by the ability to prevent the topcoat from causing the substrate to appear darkened after the topcoat has hardened on the primer layer compared to the appearance of the substrate before application of the primer layer and the topcoat.

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