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US 6,001,923 AGranted
Transparent fluorinated polyurethane coating compositions and methods of use thereof
AssigneePilkington Aerospace Inc.
InventorsMarlowe V. Moncur, Lin H. Hoo, E. John Houghton
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Abstract
In accordance with the present invention, there are provided coating compositions for preparing crosslinked fluorinated polyurethane coatings and liners that exhibit high optical clarity and transparency, as well as resilience against adverse environmental effects. The present invention also provides methods for coating solid substrates with transparent, environmentally-resistant crosslinked, fluorinated polyurethane coatings, as well as the resulting coated articles.
Claims55
A composition comprising:
- (A) an aliphatic polyisocyanate;
- (B) a non-fluorinated polyol;
- and
- (C) a saturated, iodine-free, aliphatic, fluorinated hydroxy-functional compound and selected from the group consisting of a primary fluorinated alcohol, a fluorinated polyol containing at least one primary alcohol group, and mixtures thereof,
- wherein said aliphatic fluorinated polyol is selected from the group consisting of a fluoroalkane polyol, a fluoroether polyol, a fluoro-sulfonamide polyol and combinations of any two or more thereof,
- wherein said fluoroether polyol is selected from the group consisting of polyols having the formulas:
- ##STR6## wherein r is an integer selected from 1 or 2, wherein n, m, p, and q are selected such that the molecular weight of compounds embraced by said formulas is between about 500 and about 5,000 g/mole, and wherein m/q is at least about 0.9;
- wherein said composition is either solventless or substantially solventless;
- and wherein upon application to a substrate and subsequent curing, said composition forms a weather-resistant, transparent, crosslinked, fluorinated polyurethane coating or liner having a glass transition temperature of at least about -30.degree. C.
6 more elements
Dependencies are inferred from the claim text.