Method of obtaining electroless nickel coated filled epoxy resin article
US4113899A · kind A · utility
41Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 1977 |
| Grant date | Sep 12, 1978 |
| Priority date | — |
| Expiry date | May 23, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/025
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Electroless nickel coating of epoxy resin foundry patterns and core boxes can be carried out without a palladium chloride/stannous chloride activation of the surface, if the pattern or core box contains a high density of metal particles which act as "keying" sites, and if the metal-filled resin surface is properly prepared. The preparation steps include a very light abrading with a fine (minus 60 U.S. mesh and preferably even finer) grit and a very brief acid pickling step. The electroless-plated article has a continuous coating of nickel bonded essentially directly to the resin through the metallic "keying" sites.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.