Functionalized aqueous resins

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/54 (2006.01) C08G 18/08 (2006.01) C08G 18/10 (2006.01) C08G 18/40 (2006.01)

Patent

CA 2573724

Disclosed are aqueous, functionalized resin dispersions obtained by reacting or proportionately reacting A) hydroxy group-containing ketone resins, ketone/aldehyde resins, urea/aldehyde resins, or the hydrogenated resultant products thereof, B) at least one modified isocyanate and/or polyisocyanate which comprises at least one free NCO group and is obtained by reacting at least one isocyanate and/or polyisocyanate with compounds containing at least one hydrophilic group and/or a potentially hydrophilic group in addition to being provided with at least one function that is reactive towards isocyanate groups, and C) at least one compound which is provided with a function reactive to isocyanate groups and contains additional functional groups, whereupon the optionally neutralized resin is mixed with water. Also disclosed is a method for producing said aqueous, functionalized resin dispersions.

L'invention concerne des dispersions aqueuses de résines fonctionnalisées obtenues par réaction ou réaction partielle de A) résines urée/aldéhyde, cétone/aldéhyde, cétone contenant des groupes hydroxyle ou leurs produits de réaction hydrogénés et B) au moins un isocyanate et/ou polyisocyanate modifié comportant au moins un groupe NCO libre, pouvant être obtenu par réaction d'au moins un isocyanate et/ou d'un polyisocyanate avec des composés qui possèdent, outre un groupe hydrophile ou potentiellement hydrophile, au moins une fonction réactive vis-à-vis des groupes isocyanate, ainsi qu'au moins un groupe hydrophile et/ou un groupe potentiellement hydrophile, C) au moins un composé présentant une fonction réactive vis-à-vis des groupes isocyanate et d'autres groupes fonctionnels, puis par mélange de la résine éventuellement neutralisée avec de l'eau. L'invention concerne également un procédé pour la production desdites dispersions de résines.

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