Title: Baths and additives for the electrodeposition of bright zinc

Abstract: A zinc brightener additive comprises a polymeric amine selected from the class consisting of a linear aliphatic amine polymer, an aminated polyepichlorohydrin, a polyethylenimine, and combinations thereof, and a propylene oxide-ethylene oxide block copolymer prepared by the sequential addition of propylene oxide followed by ethylene oxide, or vice versa, to a residue of an organic compound containing active hydrogen atoms such as propylene glycol or an amine base. Additionally, an aqueous acid electroplating bath containing the polymeric amine compound in combination with the propylene oxide-ethylene oxide and block copolymer provides bright, lustrous electrodepositions of zinc. Moreover, aromatic aldehydes and ketones may be utilized to provide extremely bright electrodepositions of zinc.

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Inventors: Rosenberg, William E. (Strongsville, OH, US)

Application Number: 735420
Filing Date: 1976-10-26
Publication_date: 1977-09-20
Assignee: Columbia Chemical Corporation (Cleveland, OH)
Primary Class(es): 205/312 205/311, 205/314
Other Classes:
US Patent Ref:

3729394	Apr, 1973	Hsu et al.	204/55.
3928149	Dec, 1975	Steeg	204/55.
3988219	Oct, 1976	Rosenberg	204/55.
4007098	Feb, 1977	Rosenberg	204/55.

Other Refs:
Primary Examiner: Kaplan, G. L.
Assistant Examiner:
Attorney: Oldham & Oldham Co.