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US Patent 7968669 Fluoropolymer compositions and treated substrates

Patent 7968669 was granted and assigned to E.I. Du Pont De Nemours And Company on June, 2011 by the United States Patent and Trademark Office.

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Patent abstract

A polymer having at least one carbamate linkage prepared by: (i) reacting (a) at least one diisocyanate, polyisocyanate, or mixture thereof, and (b) at least one fluorinated compound selected from the formula (I):Rf(CH2)x[(CF2CF2)y(CH2CH2)z]m(R1)r-xH  (I)wherein Rf is a perfluoroalkyl group having 1 to about 6 carbon atoms;the total number of carbons in said formula (I) excluding (R1)r-XH ranges from about 8 to about 22;and (ii) optionally reacting with (c) water, a linking agent, or a mixture thereof.

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