Patent ID: 11952512
Assignee: THE BOEING COMPANY
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 17:
18. A method of employing a surfacer as a barrier layer when chemically stripping a surface of a composite part, the method comprising:
providing a composite part that comprises a surfacer layer between the composite part and an outer layer disposed on the composite part; and
applying a chemical stripping agent to a surface of the outer layer thereby chemically removing at least a portion of the outer layer to expose the surfacer layer, wherein the surfacer layer is not removed to expose the composite, the surfacer layer thereby protecting the composite from the stripped agent;
wherein the chemical stripping agent comprises hydrogen peroxide, benzyl alcohol, or a combination thereof;
wherein the sealant is chemically resistant to the stripping agent; and
wherein applying the surfacer layer comprises mixing a sealant precursor with a curing agent to form a sealant composition, depositing the sealant composition on at least a portion of the surface of the composite part, and allowing the sealant composition to cure while air drying.