Surface treating mineral particles to reduce halide adsorption
US4781982A · kind A · utility
20Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1987 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | Nov 27, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2993
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Mineral particles are surface treated with an alkali metal silicate, hydrogen peroxide, an acid, or an organophosphorus compound. A preferred surface treating method utilizes sodium silicate in aqueous solution at pH greater than 9, followed by neutralization with acid to precipitate a silica coating onto surface portions of the particles. The mineral particles are preferably alumina particles. The surface-treated alumina particles may be incorporated into fluoride dentifrices or compounded with halogenated hydrocarbons and polymeric resins to form flame-retardant polymer compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.