Fluorochemical water and oil repellents

Details Fluorochemical water and oil repellents Fluorochemical water and oil repellents

C - Chemistry, Metallurgy

08

G

C08G 18/08 (2006.01) C08G 18/38 (2006.01) C14C 9/00 (2006.01)

Patent

CA 2378229

A polymer having at least one urea linkage derived by contacting (1) at least one polyisocyanate, or mixture of polyisocyanates, (2) at least one fluorocarbon alcohol, fluorocarbon thiol or fluorocarbon amine, (3) at least one straight or branched chain alcohol, amine or thiol, and (4) at least one alcohol containing a sulfonic acid group or its salt, and then (5) optionally at least one linking agent useful for imparting oil repellency and water repellency to substrates.

L'invention concerne un polymère comportant au moins une liaison urée, qu'on obtient en mettant en contact (1) au moins un polyisocyanate ou un mélange de polyisocyanates, (2) au moins un alcool fluorocarboné, un thiol fluorocarboné ou une amine fluorocarbonée, (3) au moins un alcool, une amine ou un thiol à chaîne droite ou ramifiée, et (4) au moins un alcool contenant un groupe acide sulfonique ou son sel, et (5) éventuellement au moins un agent de liaison. Ce polymère sert à conférer des propriétés oléofuges et hydrofuges à des substrats.

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