Peel and paint temporary protective composition surface coating
View Patent ↗The present invention is directed to a method of preparing a surface to accept paint or coating finish, including the surface of a cured polymer or polymer composite, without the need for additional treatment. The method may be used on flat or curved surfaces, including external and internal surfaces such as those used in the construction of aircraft surfaces.
1. A method for preparing a surface for the application of paint comprising:
(a) providing a substrate comprising at least one curable substrate polymer composition;
(b) applying to said substrate a curable surface coating composition comprising a fabric or film with a curable laminating adhesive resin composition;
(c) exposing the substrate of (a) and the curable surface coating composition of (b) to thermal or radiative conditions sufficient to permit co-curing thereof and formation of a bond therebetween; and
(d) removing the fabric or film so as to leave behind a layer of the cured laminating adhesive resin composition on the surface as a site for application of a paint.
2. The method of claim 1 wherein the substrate is a laminate.
3. The method of claim 1 wherein the curable substrate polymer composition comprises an epoxy.
4. The method of claim 1 wherein the curable substrate polymer composition further comprises reinforcing fibers.
5. The method of claim 1 wherein the fabric or film comprises a fluorinated or perfluorinated polymer, a polyester, a polyamide, a polyethylene, a polypropylene, a polyethylenenaphthalate, a polyethylenterephthalate, a polybutylenterephthalate, a polyether etherketone, a polyaryletherketone, a polyethersulfone, a polyethylenenimine, a poly (p-phenylene sulfide), a polyacrylate, a polymethacrylate, a polyvinyl chloride, or a co-polymer or mixture thereof.
6. The method of claim 5 wherein the fabric or film comprises a polyester, a nylon, a fluorinated or perfluorinated polymer, or a mixture thereof.
7. The method of claim 1 wherein the curable surface coating composition has a thickness in the range of 1 to 10 mils.
8. The method of claim 1 wherein the curable surface coating composition substantially conforms to the contour shape of the substrate.
9. The method of claim 1 wherein the fabric or film has a thickness in the range of 1 to 5 mils.
10. The method of claim 1 wherein the fabric is a woven fabric.
11. The method of claim 10 wherein the woven fabric comprises woven multifilament tows.
12. The method of claim 10 wherein the woven fabric comprises a plain weave, a harness satin weave, a crow-foot satin weave, or a twill.
13. The method of claim 12 wherein the fabric is woven in a crow-foot satin weave style.
14. The method of claim 10 wherein the fabric is woven with at least 80 warp ends per inch and at least 40 fill ends per inch.
15. The method of claim 14 wherein the fabric is woven with at least 120 warp ends per inch and at least 60 fill ends per inch.
16. The method of claim 10 wherein the fabric is scoured, heat set, and calendared to create a smooth tightly woven surface.
17. The method of claim 1 wherein the laminating adhesive resin composition comprises a curable epoxy resin.
18. The method of claim 1 wherein the cured surface coating composition has a total thickness in the range of 1 to 5 mils.
19. The method of claim 1 wherein the fabric or film is removed from the cured laminating adhesive without leaving behind individual filament strands.
20. The method of claim 1 further comprising applying paint.
21. The method of claim 1 wherein the surface is painted without additional surface conditioning or treatment.