Glossy coating compositions from copolymers of vinylidene fluoride
AssigneePPG Industries, Inc.
InventorsGlenn W. Luckock, William V. Warnick
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Abstract
Continuous, glossy coatings are provided by compositions comprising a copolymer of vinylidene fluoride and tetrafluoroethylene or perfluoropropene and an acrylate polymer dispersed in a gloss enhancing solvent comprising 2-nitropropane, cyclohexanone or dimethylacetamide, or a combination of such solvents. The coatings obtained have the outstanding resistance and weatherability properties characteristic of fluoropolymer coatings.
Claims14
A coating composition which dries in air at ambient temperature to form a high gloss, continuous film, comprising:
- A. from about 20 percent to about 70 percent, based on the total weight of (A) and (B), of a fluorocarbon polymer comprising from about 95 percent to about 60 percent by weight of vinylidene fluoride and from about 5 percent to about 40 percent by weight of tetrafluoroethylene or perfluoropropene;
- B. from about 30 percent to about 80 percent, based on the total weight of (A) and (B), of an acrylate polymer;
- wherein Components (A) and (B) are dissolved in gloss-enhancing solvent comprising a member selected from the class consisting of 2-nitropropane, cyclohexanone, dimethylacetamide, and combinations thereof.
A method of coating a substrate to form a high gloss, continuous film thereon consisting of:
- 1. applying to said substrate a composition comprising:
- A. from about 20 percent to about 70 percent, based on the total weight of (A) and (B), of a fluorocarbon polymer comprising from about 95 percent to about 60 percent by weight of vinylidene fluoride and from about 5 percent to about 40 percent by weight of tetrafluoroethylene or perfluoropropene;
- B. from about 30 percent to about 80 percent, based on the total weight of (A) and (B), of an acrylate polymer;
- wherein components (A) and (B) are dissolved in a gloss-enhancing solvent selected from the class consisting of 2-nitropropane, cyclohexanone and dimethylacetamide, and combinations thereof;
- and
- 2. drying said composition in air at ambient temperature to form said high gloss, continuous film.
Dependencies are inferred from the claim text.