Rhamnolipids as deposition aid

Patent metadata

Field	Value
Publication number	US-2022183958-A1
Application number	US-202017436104-A
Country	US
Kind code	A1
Filing date	Feb 21, 2020
Priority date	Mar 7, 2019
Publication date	Jun 16, 2022
Grant date	—

Abstract

Rhamnolipids are used for the deposition of at least one substance from a medium onto a surface.

First claim

1 . A method comprising:
depositing at least one substance from a medium onto a surface, wherein the medium comprises a rhamnolipid.

2 . The method according to claim 1 , wherein the at least one substance is a polymer.

3 . The method according to claim 1 , wherein the at least one substance is selected from the group consisting of a siloxane, a carbohydrate, a peptide, a protein, a protein hydrolysate, a polyallylamine, a polyimine, a polyacrylate, and a polymethacrylate.

4 . The method according to claim 1 , wherein the at least one substance has at least one substituent selected from the group consisting of an ionic substituent, an ionisable substituent, and a protonatable substituent.

5 . The method according to claim 1 , wherein the at least one substance is quaternized.

6 . The method according to claim 1 , wherein the at least one substance is selected from the group of consisting of a guar quat, a siloxane quat, and a cellulose quat.

7 . The method according to claim 1 , wherein the medium is selected from the group consisting of a surfactant mixture, an emulsion, and a microemulsion.

8 . The method according to claim 1 , wherein the medium is selected from the group consisting of cosmetic formulations.

9 . The method according to claim 1 , wherein the rhamnolipid is present in the medium at a concentration of 0.1% by weight to 30% by weight, of the total medium.

10 . The method according to claim 1 , wherein the at least one substance is present in the medium at a concentration of 0.05% by weight to 5% by weight, of the total medium.

11 . The method according to claim 1 , wherein a weight ratio of all di-rhamnolipids used to all mono-rhamnolipids used is greater than 51:49.

12 . The method according to claim 1 , wherein a pH of the medium at 25° C. is in a range from 3.5 to 9.0.

13 . The method according to claim 1 , wherein the surface is selected from the group consisting of skin and hair.

14 . The method according to claim 5 , wherein the at least one substance contains at least one selected from the group consisting of protonatable nitrogen and permanently quaternized nitrogen.

15 . The method according to claim 7 , wherein the medium is selected from the group consisting of an oil in water (O/W) emulsion, a water in oil (W/O) emulsion, a water-in-silicone emulsion, a silicone-in water emulsion, an oil in water (O/W) microemulsion, a water in oil (W/O) microemulsion, a water-in-silicone microemulsion, a silicone-in-water microemulsion, and a dispersion.

16 . The method according to claim 9 , wherein the rhamnolipid is present in the medium at a concentration of 1.0% by weight to 12% by weight, of the total medium.

17 . The method according to claim 10 , wherein the at least one substance is present in the medium at a concentration of 0.15% by weight to 1.5% by weight, of the total medium.

18 . The method according to claim 11 , wherein the weight ratio of all di-rhamnolipids used to all mono-rhamnolipids used is greater than 98:2.

19 . The method according to claim 12 , wherein the pH of the medium at 25° C. is in a range from 4.4 to 6.6.

20 . The method according to claim 13 , wherein the surface is hair.

Assignees

• Evonik Operations Gmbh

Inventors

• Kleinen Jochen
• Brandt Kathrin Daniela
• Schulz Meike
• Muss Alina

Classifications

• A61Q5/12 Primary

  Preparations containing hair conditioners · CPC title

• A61K8/60 Primary

  Sugars; Derivatives thereof · CPC title

• A61K8/90 Primary

  Block copolymers (A61K8/89 takes precedence) · CPC title