Composite structure having an inorganic coating adhered thereto and method of making same
AssigneeThe Boeing Company
InventorJames Frank Cordaro
Life of this patent
Estimating the term…
Abstract
The present disclosure provides a composite structure and associated method for preparing a composite substrate comprising an inorganic coating that is adhered to an organic-based substrate via an adhesion promoting agent comprising a molecule having a urea moiety at one end of the molecule and an alkoxysilane moiety at the other end of the molecule. The use of adhesion promoting agent having at least one of an amine or imine moiety and an alkoxysilane moiety promotes tight adhesion of the inorganic coating to the substrate.
Claims20
A method of preparing a composite structure comprising:
- providing a substrate comprising an epoxy-based matrix;
- humidifying an outer surface of the substrate to form chemisorbed water on or near said outer surface;
- applying a solution containing an adhesion promoting agent to said outer surface of the epoxy-based matrix, the adhesion promoting agent having the following formula:
- wherein X is an alkoxy group having from 1 to 3 carbon atoms;
- and
- n is a number from 1 to 5;
- drying the solution to form a layer containing the adhesion promoting agent;
- applying an inorganic coating over the layer of the adhesion promoting agent;
- and
- curing the inorganic coating to provide a composite substrate in which the inorganic coating layer is tightly adhered to the substrate.
A method of preparing a composite structure comprising:
- providing a substrate comprising an epoxy-based matrix;
- humidifying an outer surface of the substrate to form chemisorbed water on or near said outer surface;
- applying a solution containing an adhesion promoting agent to said outer surface of the epoxy-based matrix, the adhesion promoting agent having the following formula:
- wherein X is an alkoxy group having from 1 to 3 carbon atoms;
- and
- n is a number from 1 to 5;
- drying the solution to form a layer containing the adhesion promoting agent;
- applying an inorganic coating over the layer of the adhesion promoting agent;
- and
- curing the inorganic coating to provide a composite substrate in which the inorganic coating layer is tightly adhered to the substrate, wherein the adhesion promoting agent layer is disposed between and separates the outer surface of the substrate from the inorganic coating layer.
Dependencies are inferred from the claim text.