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US 4,491,611 AGranted
Process for the preparation of self-cross-linking resinous binders and their use in surface coating compositions
AssigneeShell Oil Company
InventorsAdrianus J. M. Barnhoorn, Werner T. Raudenbusch
Life of this patent
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Abstract
Catalytically self-cross-linking resinous binders are prepared by (a) addition reaction of a primary amine to a beta-hydroxyalkyl ester of an alpha, beta-ethylenically unsaturated acid, and (b) reaction of this secondary amine adduct, optionally in combination with other amines, with an epoxy resin. Curing catalysts are transesterification-promoting metal compounds. Protonized binders can be used in a cathodic electrodeposition bath.
Claims9
An aqueous paint composition suitable for cathodic electrodeposition comprising:
- (1) a resinous binder composition prepared by a process which comprises
- (a) reacting a beta-hydroxyalkyl ester of an alpha, beta-ethylenically unstaturated carboxylic acid with a primary mono- or polyamine in such molar ratios that the resulting product has on average from 1 to 2 aminohydrogen atoms per molecule;
- (b) reacting the product of (a) with a polyglycidyl ether of a polyhydric phenol in such amounts that there is not more than one aminohydrogen atom per epoxy group, and that the final adduct has on average more than one beat-hydroxyalkyl ester group per molecule, and optionally, together with one or more other amines each having from 1 to 2 aminohydrogen atoms per molecule;
- and
- (c) protonizing the resulting product by at least partial neutralization of the amino functions with an acid;
- and
- (2) from 0.1 to 6.0 percent by weight of the resinous binder of (1) of one or more transesterification-promoting metal compounds.
4 more elements
Dependencies are inferred from the claim text.