Patent ID: 8685419
Filing Date: 2014-04-01
Classification: A61K,A61Q,B82Y,C01P,C09B,C09C

Abstract:
1. A cosmetic composition, comprising: a cosmetically acceptable medium; at least one colorant comprising an inorganic fibrous matrix with tunnels; and at least one organic dye compound incorporated at least partially in the tunnels; wherein at least 30 wt % of the total amount of organic dye is included in the channels of the fibrous matrix, the organic dye compound is an indigoid, and a weight ratio of organic dye compound to inorganic fibrous matrix is greater than or equal to 0.028, wherein the inorganic fibrous matrix and the organic dye compounds are submitted to a thermal treatment (1) carried out in a single stage process at a temperature greater than or equal to 320° C. for a total time greater than or equal to 15 minutes; or (2) carried out in a single stage process at a temperature greater than or equal to 250° C. for a total time greater than or equal to 45 minutes; or (3) carried out in a two stage process wherein the first stage is carried out at a temperature greater than or equal to 250° C. for a total time greater than or equal to 10 minutes and the second stage is carried out at a temperature greater than or equal to 250° C. for a total time greater than or equal to 5 minutes; or (4) carried out in three stages each stage being carried out at a temperature greater than or equal to 320° C. for a total time greater than or equal to 4 minutes.