Polyvinyl ultraviolet light absorbers for personal care
US7989572B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | Jan 17, 2008 |
| Grant date | Aug 2, 2011 |
| Priority date | — |
| Expiry date | Dec 28, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/005
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
UV-absorbing polymers and copolymers suitable for Composition into sunscreens for the protection of human skin. The UV-absorbing chromophoric monomers chosen are simple and easily synthesized. With the correct choice of chromophoric monomer or mixture of monomers, protection against UV-A radiation or against both UV-A and UV-B radiation can be achieved. With the correct choice of comonomer, copolymers produced as aqueous latex emulsions or as Polyethylene Glycol solutions can also be achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.