Polymeric sunscreens
US4524061A · kind A · utility
20Cited by
8References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1983 |
| Grant date | Jun 18, 1985 |
| Priority date | — |
| Expiry date | Apr 22, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/57
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The polymeric sunscreen agents of the present invention comprise interpolymers of PA1 (a) an olefinic p-aminobenzoate devoid of hydroxy substitution; PA1 (b) N-vinylpyrrolidone; PA1 (c) a monomer selected from the group consisting of a vinyl lactam having a number average molecular weight of at least 125, an acrylate or methacrylate or any mixture thereof and optionally PA1 (d) acrylic or methacrylic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.