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Coating stack comprising a layer of barrier coating

  • US 7,232,615 B2
  • Filed: 04/01/2004
  • Issued: 06/19/2007
  • Est. Priority Date: 10/22/2001
  • Status: Expired due to Term
First Claim
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1. A coating composition, on a substrate, wherein the composition comprises:

  • a functional coating comprising an inner layer and an outer layer;

    at least one degradable layer located between the inner layer and the outer layer; and

    at least one layer of barrier coating located between the inner layer and the outer layer,wherein the at least one layer of barrier coating has a permeability to oxygen no greater than 10 grams per m2 per day at a temperature of 900°

    F.

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