Organic silicon compounds and cosmetic compositions
US5254542A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1991 |
| Grant date | Oct 19, 1993 |
| Priority date | — |
| Expiry date | Sep 25, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/57
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Novel organic silicon compounds having a UV absorbing benzotriazole or benzophenone skeleton are provided comprising R.sup.1.sub.3 SiO.sub.1/2 and SiO.sub.2 units as essential units, 0 to 20 mol % of R.sup.2 SiO.sub.3/2 and R.sup.3.sub.2 SiO units, and 0 to 20 mol % of R.sup.3.sub.2 SiO units. The siloxane units are present in a molar ratio: (R.sup.1.sub.3 SiO.sub.1/2 +R.sup.2 SiO.sub.3/2 +R.sup.3.sub.2 SiO)/SiO.sub.2 of from 0.5 to 1.5. At least one group of formulae (1) through (7) constitutes 1 to 33 mol % of the total quantity of the organic groups represented by R.sup.1, R.sup.2 and R.sup.3 while the remainder is a monovalent saturated or unsaturated organic group or groups having 1 to 18 carbon atoms. Cosmetic compositions containing the same compounds have improved UV absorbing capacity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.