Protecting metallic layers on substrates
US5009935A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1989 |
| Grant date | Apr 23, 1991 |
| Priority date | — |
| Expiry date | Sep 12, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of producing an article comprises applying a non-ferrous metal layer on a substrate and protecting metal layer by applying thereto a compound having a nitrogen atom which is linked to the remainder of the compound by three single bonds and which has an accessible electron lone pair, such that the electron lone pair bonds to the metal to form a complex which is insoluble or substantially insoluble in water and which protects the metal layer. The compound is preferably 1,4-Diazobicyclo (2,2,2) octane. The method is of particular use in the production of mirrors comprising a transparent substrate on which is deposited a silver layer followed by a copper layer, the compound being bonded to the copper layer by formation of the complex. The invention also provides an article made according to the method described above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.