Cosmetic composition containing a mixture of metal oxide nanopigments and melanine pigments
AssigneeL'oreal
InventorsSerge Forestier, Isabelle Hansenne
Life of this patent
Estimating the term…
Abstract
The invention relates to a cosmetic composition comprising, in a mixture, 0.10 to 15% by weight of metal oxide nanopigments chosen from titanium, zinc, cerium or zirconium oxide or mixtures thereof, with a mean diameter of less than 100 nm, and 0.001 to 2% by weight of melanin pigments derived from natural or synthetic sources with a mean diameter of between 10 and 20,000 nm, in a cosmetically acceptable carrier. This composition is useful as a composition for protecting the human epidermis or the hair against UV rays or as make-up.
Claims21
A cosmetic composition for application to the hair or skin comprising in a cosmetically acceptable carrier, a mixture of at least one metal oxide nanopigment selected from the group consisting of titanium oxide, zinc oxide, cerium oxide, zirconium oxide and mixtures thereof, said metal oxide nanopigment having a mean diameter in the range of 5 to 50 nm, and being present in said composition in an amount ranging from 0.1 to 15 percent by weight relative to the total weight of said composition, and at least one melanin pigment having a mean diameter ranging from 10 nm to 20,000 nm and being present in an amount ranging from 0.001 to 2 percent by weight relative to the total weight of said composition so as to effectively reduce or inhibit light-induced reaction of said metal oxide nanopigment or reduce whitening of the skin imparted by said metal oxide nanopigment, or both, and wherein the melanin pigment/metal oxide nanopigment weight ratio ranges from 0.00007 to 10.
A method for reducing or inhibiting light-induced reaction of a metal oxide nanopigment exposed to light, said metal oxide nanopigment being selected from the group consisting of titanium oxide, zinc oxide, cerium oxide, zirconium oxide and a mixture thereof and having a mean diameter in the range of 5 to 50 nm, said method comprising combining said nanopigment with a melanin pigment derived from a natural or synthetic source and having a mean diameter ranging from 10 nm to 20,000 nm.
Dependencies are inferred from the claim text.