Organosilicon compounds
US5403944A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1993 |
| Grant date | Apr 4, 1995 |
| Priority date | — |
| Expiry date | Jan 7, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/57
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Novel organosiloxane compounds have at least one unit ##EQU1## any other units being present in this organosiloxane are ##EQU2## wherein R is a C.sub.1-8 alkyl or aryl, R.sup.1 is H or a C.sub.1-5 alkyl, R.sup.2 is H, C.sub.1-5 alkyl or OR.sup.1, R.sup.3 is a C.sub.1-5 alkyl, R" is H, a monovalent C.sub.1-8 hydrocarbon or halogenated hydrocarbon group, a is 0, 1 or 2, b 0, 1, 2 or 3 and n 1 to 6, provided the EQU --C(R.sup.1).dbd.CH--(CR.sup.1.sub.2).sub.n --O-- group and the two R.sup.2 groups are linked to the aromatic ting at the para- and meta-positions in relation to the group --CH.dbd.C[C(O)OR.sup.3 ].sub.2. The compounds are useful as UV sunscreens. Compositions containing them are also included.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.