US 11,944,695 B2
Coated colouring solid particles comprising at least one direct dye and/or one oxidation dye precursor
Frédéric Guerin, Saint Ouen (FR)
Assigned to L'Oreal, Paris (FR)
Appl. No. 17/772,487
Filed by L'OREAL, Paris (FR)
PCT Filed Oct. 27, 2020, PCT No. PCT/EP2020/080194
§ 371(c)(1), (2) Date Apr. 27, 2022,
PCT Pub. No. WO2021/083903, PCT Pub. Date May 6, 2021.
Claims priority of application No. 1912067 (FR), filed on Oct. 28, 2019.
Prior Publication US 2023/0047506 A1, Feb. 16, 2023
Int. Cl. A61Q 5/10 (2006.01); A61K 8/02 (2006.01); A61K 8/41 (2006.01); A61K 8/44 (2006.01); A61K 8/46 (2006.01); A61K 8/73 (2006.01); A61K 8/81 (2006.01)
CPC A61K 8/0245 (2013.01) [A61K 8/415 (2013.01); A61K 8/44 (2013.01); A61K 8/463 (2013.01); A61K 8/731 (2013.01); A61K 8/8152 (2013.01); A61K 8/8176 (2013.01); A61Q 5/10 (2013.01); A61K 2800/432 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A coloring solid particle (1), having a volume of between 25 mm3 and 125 mm3, and comprising:
a. a core (2) containing one or more dyes chosen from direct dyes and/or oxidation dye precursors; and
b. an upper coating layer (3) covering said core (2), and containing one or more cellulose ethers.