Stain resistant polyurethane coatings

C - Chemistry – Metallurgy – 08 – G

Patent

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C08G 18/10 (2006.01) C08G 18/12 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2541757

A chemical composition comprises one or more urethane oligomers of at least two polymerized units selected from the group consisting of fluorine- containing urethane oligomers and long-chain hydrocarbon-containing urethane oligomers, wherein said oligomers comprise the reaction product of (a) one or more polyfunctional isocyanate compounds, (b) one or more polyols, (c) one or more monoalcohols selected from the group consisting of fluorocarbon monoalcohols, optionally substituted long-chain hydrocarbon monoalcohols, and mixtures thereof, (d) one or more silanes, and (e) one or more stabilizers comprising one or more reactive groups.

L'invention concerne une composition chimique contenant un ou plusieurs oligomères d'uréthane d'au moins deux unités polymérisées choisies dans le groupe constitué d'oligomères d'uréthane contenant du fluor et d'oligomères d'uréthane contenant des hydrocarbures à longue chaîne, ces oligomères contenant le produit de réaction de (a) un ou plusieurs composés d'isocyanate polyfonctionnel, (b) un ou plusieurs polyols, (c) un ou plusieurs monoalcools choisis dans le groupe constitué de monoalcool de fluorocarbure, de monoalcool d'hydrocarbure à longue chaîne éventuellement substitué, et de mélanges de ceux-ci, (d) un ou plusieurs silanes, et (e) un ou plusieurs stabilisateurs contenant un ou plusieurs groupes réactifs.

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