Abrasion-resistant article coated with a coating compositions based on fluorinated monohydric alcohol
AssigneeGenCorp Inc.
InventorsI. Glen Hargis, Russell A. Livigni, Earl G. Melby, Francis J. Vitus
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Abstract
A urethane coating composition is disclosed which uses fluorinated monohydric alcohols to increase abrasion resistance. One specific use of the coating is on vehicle sealing systems which use elastomeric substrates. The coating composition was found to have dramatically improved abrasion resistance in glass run channel applications over similar coatings without the fluorinated component.
Claims11
A laminate comprising a cured coating composition on a substrate, said coating composition being the reaction product of a reaction mixture comprising;
- (a) a fluorinated monohydric alcohol other than fluorinated poly(oxetane), wherein at least 20 percent of the total hydrogen and halogen atoms of said fluorinated monohydric alcohol are fluorine atoms,
- (b) a nonfluorinated polyol, wherein said nonfluorinated polyol is a polyether, a polyester, or a hydrogenated polydiene polyol or a combination thereof;
- and
- (c) a polyisocyanate of the formula R(NCO).sub.n where n is an integer from 2 to 5 and R has from 4 to 100 carbon atoms and R is not a polyether or a polyester, wherein the ratio of isocyanate groups to hydroxyl groups in said reaction mixture is from 1:1 to 50:1.
In a laminated article comprising a shaped elastomeric substrate and a cured abrasion resistant urethane coating thereon, the improvement wherein the urethane coating prior to curing comprises 1 to 60 wt. percent of a fluorinated monohydric alcohol based on the dried coating weight, said monohydric alcohol being other than fluorinated poly(oxetane)s and having at least 20 percent fluorine atoms based on the total hydrogen and halogen atoms of said fluorinated alcohol.
In a method for using a monohydric alcohol in a urethane coating composition, said urethane coating composition comprising a monohydric alcohol reacted with a polyisocyanate and a nonfluorinated polyol reacted with a polyisocyanate, the improvement wherein the monohydric alcohol comprises a fluorinated monohydric alcohol other than fluorinated poly(oxetane)s in an amount from 1 to 60 wt. percent of said coating compositions, wherein at least 20 percent of the total hydrogen and halogen atoms of said fluorinated monohydric alcohol are fluorine atoms and wherein said urethane coating composition is applied as a coating to an elastomeric glass run channel and subsequently cured.
Dependencies are inferred from the claim text.