The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 28, 2000
Filed:
Mar. 26, 1999
Patricia Lemann, Creteil, FR;
Jean-Christophe Simon, Paris, FR;
L'Oreal S.A., Paris, FR;
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.