Sunscreen compositions
US5989528A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1998 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Jul 30, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/4946
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to compositions suitable for use as sunscreens which provide excellent stability, efficiency, and UV protection efficacy in a safe, economical and aesthetically appealing manner (on-skin transparency, low skin irritation). Methods of use for these compositions are also disclosed. The compositions comprise: PA1 a) a safe and effective amount of a UVA-absorbing dibenzoylmethane sunscreen active; PA1 b) a safe and effective amount of a stabilizing agent having the formula ##STR1## wherein R.sub.1 and R.sub.1 ' are independently in the para or meta position and are independently a hydrogen atom or a straight- or branched chain C.sub.1 -C.sub.8 alkyl radical, R.sub.2 is a straight- or branched-chain C.sub.1 -C.sub.12 alkyl radical; and R.sub.3 is a hydrogen atom or a --CN radical; PA1 c) a safe and effective amount of a UVB sunscreen selected from the group consisting of organic sunscreen actives, inorganic physical sunblocks, and mixtures thereof, wherein the inorganic physical sunblock is present in a total amount of less than or equal to about 5%; and PA1 d) a carrier suitable for application to the skin wherein the mole ratio of the stabilizing agent to…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.