Self-crosslinking, heat-curable grinding resin
AssigneeBASF Farben & Fasern AG
InventorsMichael Geist, Gunther Ott
Life of this patent
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Abstract
The invention relates to a self-crosslinking heat-curable binder, in particular for electrocoating finishes, based on an organic synthetic resin which contains primary and/or secondary hydroxyl groups, esterified carboxyl groups and quaternary ammonium groups and can be diluted with water as a result of partial or complete neutralization with acids. The esterified carboxyl groups are activated in the alcohol component by a substituent which has a negative inductive effect.
Claims12
A self-crosslinking, heat-curable binder, in particular for electrocoating finishes, based on an organic synthetic resin which contains primary and/or secondary hydroxyl groups and esterified carboxyl groups and may contain amino groups, wherein the synthetic resin contains 0.8 to 2.0 quaternary ammonium groups per molecule, and the esterified carboxyl groups are activated in the alcohol component by a substituent which has a negative inductive effect.
A process for the preparation of a binder, in particular for electrocoating finishes, wherein a polyglycidyl ester or ether is reacted with a compound which carries two groups which are reactive toward epoxide groups and at least one carboxylic ester group which is activated in the alcohol component by a substituent which has a negative inductive effect to give an intermediate possessing terminal epoxide groups, and these epoxide groups are reacted with a salt of a tertiary amine, ring-opening taking place.
Dependencies are inferred from the claim text.