US 11,707,428 B2
Dye composition comprising a combination of two plant extracts of Lawsonia inermis
Christel Fiorini-Puybaret, Toulouse (FR); and Philippe Joulia, Villenouvelle (FR)
Assigned to PIERRE FABRE DERMO-COSMETIQUE, Boulogne-Billancourt (FR)
Appl. No. 17/608,432
Filed by PIERRE FABRE DERMO-COSMETIQUE, Boulogne-Billancourt (FR)
PCT Filed Jun. 12, 2020, PCT No. PCT/EP2020/066331
§ 371(c)(1), (2) Date Nov. 2, 2021,
PCT Pub. No. WO2020/249748, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. 1906266 (FR), filed on Jun. 12, 2019.
Prior Publication US 2022/0192971 A1, Jun. 23, 2022
Int. Cl. A61Q 5/10 (2006.01); A61K 8/9789 (2017.01); A61Q 5/06 (2006.01); C09B 61/00 (2006.01); C09B 67/22 (2006.01)
CPC A61K 8/9789 (2017.08) [A61Q 5/065 (2013.01); C09B 61/00 (2013.01); C09B 67/0033 (2013.01); A61K 2800/43 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for preparing a dye composition comprising the following steps:
providing an extract A of the aerial parts of Lawsonia inermis containing from 7 to 60% by weight of lawsone relative to the total weight of the dry extract, wherein the lawsone results notably from enzymatic hydrolysis of glycosylated lawsone derivatives; and
providing an extract B of the aerial parts of Lawsonia inermis containing less than 0.6% by weight of lawsone, at least 15% by weight of phenol compounds and at least 60% by weight of saccharide compounds, including polysaccharides, relative to the total weight of the dry extract;
mixing extract A and extract B;
obtaining a dye composition.