Patent ID: 7776434
Filing Date: 2010-08-17
Classification: B32B,Y10T

Abstract:
1. An article comprising: an organic matrix composite substrate; and a thermal oxidative barrier coating on at least one surface of the substrate; wherein the organic matrix composite substrate comprises a first polyimide matrix formed by curing under suitable cure conditions, a polyimide precursor blend comprising a first prepolymer component and a second prepolymer component, wherein the first and second prepolymer components independently comprise a monomeric mixture, a reaction product of a monomeric mixture, or a combination thereof, wherein each monomeric mixture includes a diamine component, a dianhydride component, and an end group component; wherein the thermal oxidative barrier coating includes at least a bond coat disposed on the at least one surface of the substrate and at least one thermal barrier layer substantially overlying the bond coat; wherein the bond coat comprises nano-particles carried in a second polyimide matrix; and wherein the at least one thermal barrier layer comprises at least one member selected from the group consisting of a silsesquioxane and an inorganic polymer.