Dyestuffs of plant origin and use thereof for colouring compositions, in particular cosmetic compositions

Patent metadata

Field	Value
Publication number	US-9839603-B2
Application number	US-201414146985-A
Country	US
Kind code	B2
Filing date	Jan 3, 2014
Priority date	Apr 29, 2008
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

The invention relates to a dyestuff of plant origin, obtained from a colored part of a plant species, the cell tissues of which contain iridisomes responsible for the coloration of said part. It relates most particularly to a blue dyestuff obtained from the arils of the seeds of the plant species Ravenala madagascariensis . It also relates to compositions, in particular cosmetic compositions, especially intended for making up the skin or superficial body growths, containing said dyestuff.

First claim

The invention claimed is:

1. A method for extracting a blue colored wax from a Ravenala madagascariensis plant, said blue colored wax comprising iridisomes producing a blue coloration of said blue colored wax and a wax fraction; the method comprising the steps of:
(a) mixing arils of seeds of the Ravenala madagascariensis plant with an alkaline aqueous medium and forming a basic solution;
(b) adding an organic acid to the basic solution in an amount sufficient for adjusting pH of the mixture to 4 or less and forming a mixture comprising a blue colored wax in the form of precipitated flakes and cellulose-based residues; and
(c) filtering the mixture of step (b), separating the blue colored wax from the cellulose-based residues and recovering the blue colored wax comprising iridisomes and a wax fraction from the mixture.

2. The method of claim 1 , wherein the alkaline aqueous medium comprises ammonia.

3. The method of claim 1 , wherein the organic acid comprises acetic acid.

4. The method of claim 1 , further comprising maintaining the temperature of the basic solution in step (a) at about 60° C.

5. The method of claim 1 , further comprising applying at least one external energy source to the basic solution during step (a).

6. The method of claim 5 , wherein the external energy source comprises mechanical stirring, homogenizing, milling, ultrasound, or a combination thereof.

7. A method for preparing a cosmetic composition comprising extracting a blue colored wax according to the method of claim 1 , further comprising a step of mixing the blue colored wax with an oily phase.

Assignees

• Lvmh Rech

Inventors

• Andre Patrice
• Garcia Michel

Classifications

• A61K8/9794

  Liliopsida [monocotyledons] · CPC title

• C09B67/0096

  Purification; Precipitation; Filtration · CPC title

• A61Q5/065

  Preparations for temporary colouring the hair, e.g. direct dyes · CPC title

• A61Q3/00

  Manicure or pedicure preparations · CPC title

• A61Q19/00

  Preparations for care of the skin · CPC title