Patent ID: 9579527
Date: 2017-02-28
CPC Classifications: A61K,A61Q

Claim:
1. Process for manufacturing a solid anhydrous cosmetic compact powder, comprising: (a) from 70% to 99% by weight of at least one particulate solid phase made of pigments and fillers, (b) from 0.1% to 30% by weight of at least one non-volatile liquid phase comprising an oil, an alcohol chosen from C3-C5 polyols, glycol ethers, and mixtures thereof, and (c) from 0.01% to 4% by weight of at least one block copolymer obtained from a first monomer of 2-acrylamidomethylpropanesulphonic acid or a salt thereof, and from a vinyl second monomer having a nitrogenous side chain, said process comprising: (i) mixing the particulate solid phase, the non-volatile liquid phase, the block copolymer and water so as to obtain a homogenous slurry, (ii) placing the slurry in a mould, and (iii) removing water present in the slurry, wherein the slurry is devoid of a surfactant, and said pigments and fillers are devoid of surface treatment that renders them hydrophobic or hydrophilic.