Polymer compositions and alkaline zinc electroplating baths
US4730022A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 6, 1987 |
| Grant date | Mar 8, 1988 |
| Priority date | — |
| Expiry date | Mar 6, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D3/22
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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 PA0 (A) preparing an intermediate by reacting PA1 (A-1) at least one nitrogen-containing heterocyclic compound with PA1 (A-2) an epihalohydrin, glycerolhalohydrin or mixtures thereof, and PA0 (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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.