Superabsorbent polymers and sunscreen actives for use in skin care compositions
US9549891B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Jan 24, 2017 |
| Priority date | — |
| Expiry date | Sep 4, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q19/08
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A skin care composition having from about 0.01% to about 5%, by weight, of an superabsorbent polymer which is a sodium polyacrylate, sodium polacrylate starch, sodium acrylates crosspolymer-2 or mixtures of these and a portion of the polymer comprises a grafted starch material. The superabsorbent polymer is particulate where the particles have an average particle size in the range of from about 5μ-30μ, and the individual particles in their dry or un-swollen condition are substantially non-spherical, flat, platelet, or elongated in shape. The particles have an absorption capacity of at least about 1000 times their initial dry or un-swollen volume. Additionally, the skin care composition contains from about 0.01-10% of a dry powder that is either starch or silicone based and wherein the dry powder is coated with a silicone based material. Further there is provided a UV active.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.