Process of producing hydrophobic titanium oxide fine particle
US5411761A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1993 |
| Grant date | May 2, 1995 |
| Priority date | — |
| Expiry date | Feb 17, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/62
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process of producing hydrophobic titanium oxide fine particles, comprising the steps of dispersing titanium oxide fine particles in an aqueous alkaline solution, adding a trialkoxysilane to the resulting dispersion in an amount of 1 to 1,000 parts by weight per 100 parts by weight of the titanium oxide fine particles, and carrying out the hydrolysis, whereby a film of a hydrolysis condensation product of the trialkoxysilane is formed on the surface of the titanium oxide fine particles. According to the present invention, titanium oxide fine particles can be treated quite effectively to be rendered hydrophobic without damaging the powdery nature of the titanium oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.