Abrasive composition and process for polishing plastic article
US4935039A · kind A · utility
17Cited by
4References
11Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Apr 14, 1989 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Apr 14, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K3/1463
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An effective abrasive composition is provided for polishing a plastic article, particularly a plastic lens, to give a mirror surface thereto. This abrasive composition comprises water, an aluminous abrasive and at least one polishing accelerator selected from the group consisting of aluminum oxalate and aluminum lactate, optionally with at least one sedimentation preventing agent selected from the group consisting of crystalline cellulose and colloidal alumnia.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.