Back to results
US 3,974,045 AGranted
Method for electroplating bright zinc
AssigneeDipsol Chemicals Co., Ltd.
InventorsAkio Takahashi, Atsushi Fukuda, Toshio Igarashi
Life of this patent
Estimating the term…
Abstract
A brightener additive for zinc electroplating baths, which comprises: a water-soluble polymer prepared by the reaction of an epihalohydrin with a nitrogen heterocyclic compound such as the compounds of imidazole, pyrrole, cyclic amine of the formula: ##EQU1## and piperazine in the presence of a nitrogen compound such as the compounds of aliphatic amines, hexamethylenetetramine and ammonia.
Claims9
A method for the electrodeposition of a bright zinc, which comprises:
- electrodepositing the zinc from an aqueous zinc electrode depositing bath comprising an aqueous solution containing a source of zinc ions and an effective amount, sufficient to yield a bright zinc electrodeposit, of a water soluble polymer prepared by the reaction of at least one epihalohydrin with at least one nitrogen heterocyclic compound selected from the group consisting of imidazole, pyrrole, piperazine and compounds thereof, and at least one compound selected from the group consisting of aliphatic amines, hexamethylene tetramine and ammonia, wherein 0.2 - 5 moles of said epihalohydrin is reacted with 0.2 - 10 moles of said aliphatic amine, ammonia or hexamethylene tetramine per mole of said nitrogen heterocyclic compound at 50.degree.- 100.degree.C.
Dependencies are inferred from the claim text.