Polymer compositions and alkaline zinc electroplating baths
AssigneeMcGean-Rohco, Inc.
InventorWilliam J. Willis
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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 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) an epihalohydrin, glycerolhalohydrin or mixtures thereof, and (B) reacting said intermediate with at least one amidine compound 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.
Claims29
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) an epihalohydrin, glycerolhalohydrin or mixtures thereof, and
- (B) reacting said intermediate with at least one amidine compound 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) an epihalohydrin in a mole ratio of from about 1:0.2 to about 1:5, and
- (B) reacting said intermediate with an amidine compound characterized by the formula
- R.sup.1 C(NR.sup.2) N (R.sup.3).sub.2
- wherein R.sup.1 is hydrogen, lower alkyl, aryl or N(R.sup.3).sub.2, R.sup.2 is hydrogen or a cyano group, and each R.sup.3 is hydrogen or a lower alkyl group, the molar ratio of amidine to imidazole or alkyl-substituted imidazole being from about 0.05:1 to about 2:1 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) epichlorohydrin in the presence of water, the molar ratio of imidazole to epichlorohydrin being within the range of from about 1:0.2 to about 1:5, and
- (B) reacting said intermediate with an amidine compound characterized by the formula
- R.sup.1 C(NR.sup.2)N(R.sup.3).sub.2
- wherein R.sup.1 is hydrogen, methyl, N (R.sup.3).sub.2 and each R.sup.3 is hydrogen or a methyl group, or the acid salts thereof, the molar ratio of amidine compound to imidazole being from about 0.05:1 to about 2:1.
Dependencies are inferred from the claim text.