Silicone polymer-coated, hydrophobized metal oxides
US5756788A · kind A · utility
18Cited by
8References
52Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Oct 7, 1996 |
| Grant date | May 26, 1998 |
| Priority date | — |
| Expiry date | Oct 7, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/412
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A process for making metal oxide hydrophobic by coating the metal oxide with a silicone polymer is disclosed. The hydrophobic metal oxide is prepared by contacting the metal oxide with a reactive silicone compound and then in a subsequent step the coated metal oxide is heated to 40.degree. to 100.degree. C. for between 1 and 10 hours. The resulting metal oxide is hydrophobic, non-reactive, not affected by water and can be applied to the skin for protection from ultraviolet light of the sun.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.