Cosmetic composition comprising a novel pigment
US6042842A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1999 |
| Grant date | Mar 28, 2000 |
| Priority date | — |
| Expiry date | Mar 26, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/522
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to cosmetic compositions, in particular make-up cosmetic compositions, comprising a novel red pigment with an intense and saturated color which does not generate free radicals. This novel pigment is a diketopyrrolopyrrole (DPP) of formula: ##STR1## in which R.sub.1 and R.sub.2 independently represent a hydrogen atom, a C.sub.1 to C.sub.18 alkyl radical, a C.sub.3 to C.sub.12 alkenyl radical, a C.sub.2 to C.sub.5 alkoxycarbonyl radical or a phenyl radical which is optionally substituted by a halogen and R.sub.3 and R.sub.4 independently represent a hydrogen atom, a C.sub.1 to C.sub.18 alkyl radical, a C.sub.1 to C.sub.4 alkoxy radical, a halo radical or a phenyl radical, or a --SO.sub.3 M group with M being a hydrogen atom, a metal atom or an ammonium group, it being possible for the alkyl, alkenyl and alkoxy radicals to be linear or branched. By virtue of this pigment, it is possible to protect the skin, lips and keratinous fibers from free radicals without using antioxidizing agents in the composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.