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US 6,803,109 B2Granted
Water-and oil-repellency imparting urethane oligomers comprising perfluoroalkyl moieties
Assignee3M Innovative Properties Company
InventorsZai-Ming Qiu, John C. Clark, Wayne W. Fan
Life of this patent
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Abstract
Fluorochemical urethane compositions comprising one or more compounds or oligomers having at least on fluorine-containing repeatable unit and at least one fluorine-containing terminal group are described. The compositions are useful as coatings or incorporated as melt additives. The fluorochemical compositions impart oil and water repellency to the substrate. In other aspects, this invention relates to processes for imparting oil and water repellency characteristics to substrates and articles.
Claims29
Fluorochemical urethane composition comprising:
- one or more oligomers comprising (i) at least one fluorine-containing repeatable unit and (ii) at least one fluorine-containing terminal group, and wherein said oligomers comprise the condition reaction product of:
- (a) one or more fluorinated polyols;
- (b) one or more polyisocyanates;
- and
- (c) one or more monofunctional fluorine-containing compounds having one functional group that is reactive with the hydroxyl group of said polyol (a) or with the isocyanate group of the polyisocyanate (b).
2 more elements
Dependencies are inferred from the claim text.