Alumina abrasive particles used for automotive finishing compositions
US11130682B2 · kind B2 · utility
0Cited by
5References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2018 |
| Grant date | Sep 28, 2021 |
| Priority date | — |
| Expiry date | Feb 3, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/16
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present disclosure is directed to an alpha alumina powder having a specific surface area, a specific crystallite size, and a specific particle size distribution for use in abrasive polishes, and method of making such powder. The method of making the alpha alumina powder can include calcining an aluminum oxide precursor powder at a temperature of 800-1500° C. and milling the calcined powder to the specific particle size distribution. The alpha alumina powder disclosed herein can quickly enable high removal rate with undiminished aesthetic quality when used in abrasive polishes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.