Polymer compositions and alkaline zinc electroplating baths and processes
AssigneeMcGean-Rohco, Inc.
InventorWilliam I. Willis
Life of this patent
Estimating the term…
Abstract
Compositions are described which are useful particularly in improving the electrodeposition of zinc from aqueous alkaline plating baths. In one embodiment, the new composition comprises the reaction product of (A-1) at least one nitrogen-containing heterocyclic compound with (A-2) at least one hydroxyamine; (A-3) an epihalohydrin, glycerolhalohydrin or mixtures thereof; and (A-4) at least one amino compound containing at least one N--H group to form the desired polymeric composition. Aqueous alkaline zinc electroplating baths containing the compositions of the invention with or without cyanide present, deposit a bright and lustrous zinc coating on metal over a wide range of current densities.
Claims53
A polymeric composition which comprises the reaction product of
- (A-1) at least one nitrogen-containing heterocyclic compound;
- (A-2) at least on alkanolamine
- (A-3) an epihalohydrin, glycerolhalohydrin or mixtures thereof;
- and
- (A-4) at least one amino compound containing at least one N--H group.
A polymeric composition prepared by the process which comprises the steps of
- (A) preparing a mixture comprising
- (A-1) at least one nitrogen-containing heterocyclic compound;
- (A-2) at least one alkanolamine;
- and
- (A-4) at least one amino compound containing at least one N--H group;
- and
- (B) reacting said mixture with
- (A-3) and epihalohydrin, glycerolhalohydrin or mixtures thereof to form the desired polymeric composition.
A polymeric composition prepared by the process which comprises the steps of
- (A) preparing an intermediate by reacting
- (A-1) at least one nitrogen-containing heterocyclic compound with
- (A-2) at least one alkanolamine, and
- (A-3) an epihalohydrin, glycerolhalohydrin or mixtures thereof, and
- (B) reacting said intermediate with
- (A-4) at least one amino compound containing at least one N--H group to form the desired polymeric composition.
A polymeric composition prepared by the process which comprises the steps of
- (A) preparing an intermediate by reacting
- (A-1) imidazole or an alkyl-substituted imidazole with
- (A-2) at least one alkanolamine, and
- (A-3) an epihalohydrin in a mole ratio of from about 1:0.1:1 to about 1:2:5
- (B) reacting said intermediate with (A-4) ammonia, an aliphatic amine or polyamine containing at least one N--H group to form the desired polymeric compound.
A polymeric composition prepared by the process which comprises the steps of
- (A) preparing an intermediate by reacting
- (A-1) imidazole with
- (A-2) an ethanolamine, and
- (A-3) epichlorohydrin in the presence of water, the molar ratio of imidazole to ethanolamine to epichlorohydrin being within the range of from about 1:0.1:1 to about 1:2:5, and
- (B) reacting said intermediate with an aliphatic diamine, the molar ratio of aliphatic diamine to imidazole being from about 0.1:1 to about 2:1.
Dependencies are inferred from the claim text.