Hydrophilic polyurethane-polyurea dispersions

Details Hydrophilic polyurethane-polyurea dispersions Hydrophilic polyurethane-polyurea dispersions

C - Chemistry, Metallurgy

08

G

C08G 18/80 (2006.01) C08G 18/08 (2006.01) C08G 18/12 (2006.01) C08G 18/66 (2006.01)

Patent

CA 2510552

The present invention relates to hydrophilic polyurethane (PU) prepolymers comprising a polymer backbone with structural units of formula (I), (see formula I) in which R1 and R2 independently of one another the radicals H, C1-C20-(cyclo)alkyl, C6- C24-aryl, C1-C20-(cyclo)alkyl ester or amide, C6-C24-aryl ester or amide, mixed aliphatic/aromatic radicals having 1 to 24 carbon atoms, which may also be part of a 4 to 8-membered ring, and X is an electron-withdrawing group, n is an integer from 0 to 5, and also having structural units of polymeric polyols from the average molar weight range from 400 to 600, the polymer backbone possessing ionic or potentially ionic and/or nonionically hydrophilicizing groups.

L'invention concerne de nouveaux prépolymères de polyuréthanne hydrophiles ainsi que leurs dispersions aqueuses de (PUR)-polyuréthanne-polyurée.

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