Abrasive composition and process for polishing
US4929257A · kind A · utility
21Cited by
8References
15Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Mar 30, 1989 |
| Grant date | May 29, 1990 |
| Priority date | — |
| Expiry date | Mar 30, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F3/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An abrasive composition comprising: an aluminous abrasive, preferably having an average particle size of 0.5-10 .mu.m and a concentration of 1 to 25% by weight; nickel sulfamate and/or sulfate, preferably having a concentration of 0.5 to 10% by weight; magnesium nitrate, preferably having a concentration of 0.1 to 12% by weight and water, the composition preferably having a pH of 4 to 7. This abrasive composition produces a superior effect, particularly a reduction of protrusions and pits and deep scratches when used for polishing an aluminum-based substrate for a magnetic recording disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.