Dispersions comprising polyurethanes having carbonyl groups...

C - Chemistry – Metallurgy – 08 – G

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C08G 18/38 (2006.01) C08G 18/08 (2006.01) C08G 18/12 (2006.01) C08G 18/50 (2006.01) C08G 18/65 (2006.01) C08G 18/83 (2006.01) C08L 75/04 (2006.01) C09D 11/10 (2006.01) C09D 175/04 (2006.01) C14C 11/00 (2006.01)

Patent

CA 2230827

The invention concerns aqueous dispersions containing a polyurethane (A), containing structural units derived from compounds of formula (I), in which the substituents have the following meanings: R1, R2, R3 each designate hydrogen, C1-C24 alkyl or C6 - C24 alkenyl; R4 designates hydrogen; R5, R6 a) together designate C4-C10 alkane-diyl, b) each designate C2-C10 alkyl, C5-C8 cycloalkyl or C7-C20 aralkyl, c) each designate a hydroxyl-terminated poly(C2- C4 alkylene oxide), or d) designate an R5 or R6 group with the meaning given in (a) to (c) and the other group designating hydrogen or a group of formula (II), in which X designates C2-C6 alkane-diyl; and R7 has the same meaning as R5 or R6 with the exception that R7 is not a group of formula II, R5 and R6 carrying a total of between 2 and 5 hydroxyl groups bonded to aliphatic carbon atoms; and R5 and/or R6 optionally carrying 1 or 2 aromatically bonded hydroxyl groups or 1 nitrile, tertiary amino, carboxylic acid or sulphonic acid group which are optionally present in the form of their salts.

L'invention concerne des dispersions aqueuses qui contiennent un polyuréthane (A), comprenant des unités structurales dérivées de composés de la formule (I) dans laquelle les substituants ont la notation suivante: R?1¿,RE?2¿, R?3¿ désignent chacun hydrogène, alkyle C¿1? à C¿24? ou alkényle C¿6? à C¿24?, R?4¿ désigne hydrogène, R?5¿, R?6¿ désignent a) conjointement, alcanediyle C¿4? à C¿10?, b) chacun, alkyle C¿2? à C¿10?, cycloalkyle C¿5? à C¿8? ou aralkyle C¿7? à C¿20?, c) chacun, un poly(oxyde d'alkyle) C¿2? à C¿4? terminé par hydroxyle, d) un reste R?5¿ ou R?6¿ ayant la notation mentionnée sous a) jusqu'à c), l'autre reste désignant hydrogène ou un reste de la formule (II) dans laquelle X désigne alcanediyle C¿2? à C¿6?, R?7¿ a la même notation que R?5¿ ou R?6¿, sous réserve que R?7¿ ne désigne pas un reste de la formule (II), les restes R?5¿ et R?6¿ portent au total 2 à 5 groupes hydroxyle liés à des atomes aliphatiques de carbone et éventuellement le reste R?5¿ et/ou R?6¿ porte 1 ou 2 groupes hydroxyle liés de manière aromatique ou 1 groupe nitrile, 1 groupe amino tertiaire, 1 groupe acide carboxylique ou un groupe acide sulfonique, éventuellement présents sous la forme de leurs sels.

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