Baths and additives for the electrodeposition of bright zinc
US4049510A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 26, 1976 |
| Grant date | Sep 20, 1977 |
| Priority date | — |
| Expiry date | Oct 26, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D3/22
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.