Restorative coating method for plastic and glass
AssigneeGreat Barrier Systems, Inc.
InventorsRobert H. Black, Yehuda C. Cohen
Life of this patent
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Abstract
A product and method of restoring a defaced or scratched window using a polyurethane film applied prior or subsequent to the damage to the window. The polyurethane fills in the scratches to the window and restores optical clarity. The polyurethane may be an aliphatic polyester polyurethane or aliphatic acrylic polyurethane. A further method is described which provides a protective coating to a window including a polyurethane film applied before the window is defaced. The film may be removed and reapplied easily to provide restored optical clarity.
Claims7
A coated product comprising a window substrate and a coating over said substrate formed by placing a liquid coating over said substrate, said window substrate having scratches formed therein and unscratched portions, said liquid coating filling said scratches to form a substantially equally transmissive medium for light passing through said scratched and said unscratched portions of said window substrate, said liquid coating comprising a two component aliphatic polyester polyurethane, and drying said liquid coating to remove volatile solvents, wherein said liquid coating includes:
- a clear polyester component, having active ingredients, consisting essentially of in wt. %
- a nonvolatile polyester resin:
- 42-46,
- a flow additive:
- 0.8-1.2,
- a catalyst:
- 0.2-0.3,
- an ultraviolet absorber:
- 1.0-1.4, and
- an aliphatic prepolymer activator component, having an active ingredient, consisting essentially of, in wt. %
- 1.6-hexamethylene diisocyanate:
- 20-24,
- and at least one solvent component:
- 27.1-36.
Dependencies are inferred from the claim text.