TOPICAL COMPOSITION

Abstract

The present invention relates to topical compositions comprising a saccharide isomerate and at least one acryloyldimethyltaurate polymer comprising alkali metal ions and/or ammonium ions, characterized in that the ratio of alkali metal ions to ammonium ions in the acryloyldimethyltaurate moieties in the at least one polymer is at least 1 as well as to the use of an alkali metal acryloyldimethyltaurate polymer to suppress discoloration in topical compositions comprising a saccharide isomerate and an ammonium acryloyldimethyltaurate polymer.

Claims

1. A topical composition comprising a saccharide isomerate and at least one acryloyldimethyltaurate polymer comprising alkali metal ions and/or ammonium ions, characterized in that the ratio of alkali metal cations to ammonium ions in the acryloyldimethyltaurate moieties in the at least one polymer is at least 1.

2. The topical composition according to claim 1, wherein the amount of the saccharide isomerate is selected in the range from 0.01 to 10 wt.-%, preferably in the range from 0.1 to 7.5 wt.-%, most preferably in the range from 0.2 to 5 wt.-%, based on the total weight of the topical composition.

3. The topical composition according to claim 1, wherein the amount of the at least one acryloyldimethyltaurate polymer is selected in the range from 0.01 to 10 wt.-%, preferably in the range from 0.1 to 5 wt.-%, most preferably in the range from 0.2 to 3 wt.-%, based on the total weight of the topical composition.

4. The topical composition according to claim 1, wherein the alkali metal ion is a sodium cation.

5. The topical composition according to claim 1, wherein the at least one acryloyldimethyltaurate polymer is a mixture of a sodium acryloyldimethyltaurate polymer and an ammonium acryloyldimethyltaurate polymer.

6. The topical composition according to claim 5, wherein the ratio (w/w) of the sodium acryloyldimethyltaurate polymer to the ammonium acryloyldimethyltaurate polymer is in the range from 50:1 to 1:1, preferably in the range from 25:1 to 1:1, most preferably in the range from 10:1 to 1:1.

7. The topical composition according to claim 1, wherein the acryloyldimethyltaurate polymer is selected from the group of copolymers of sodium and/or ammonium acryloyldimethyltaurate with a vinylic monomer.

8. The topical composition according to claim 7, wherein the vinylic monomer is selected from the group consisting of vinylpyrrolidone, beheneth-25 methacrylate, vinylformamide and hydroxyethylacrylate as well as mixtures thereof.

9. The topical composition according to claim 1, wherein the at least one acryloyldimethyltaurate polymer is a mixture of Hydroxyethylacrylate/Sodium Acryloyldimethyltaurate Copolymer and Ammonium Acryloyldimethyltaurate/Beheneth-25 Methacrylate Crosspolymer.

10. The topical composition according to claim 1, wherein the composition is an O/W emulsion, a W/O emulsion, a gel, a shampoo preparation or a hair conditioner.

11. The topical composition according to claim 10, wherein the composition is gel, preferably a cream gel comprising at least 60 wt.-%, more preferably at least 70 wt.-%, most preferably at least 80 wt.-% of water, based on the total weight of the topical composition.

12. A method of treating the skin and/or the scalp of a human, said method comprising the steps of contacting the skin and/or scalp with a topical composition according to claim 1.

13. Use of at least one sodium acryloyldimethyltaurate polymer to suppress discoloration in topical compositions, whereby the topical composition comprises a saccharide isomerate and an ammonium acryloyldimethyltaurate polymer.

14. A method of suppressing the discoloration in a topical composition comprising a saccharide isomerate and an ammonium acryloyldimethyltaurate polymer, said method comprising the addition of a sodium acryloyldimethyltaurate polymer to said topical composition

Description

EXAMPLE

[0067] All trials have been performed in the cream-gel base formula shown in table 1 which has been prepared according to standard methods in the art. The pH of all formulations was adjusted to pH 5.5. Afterwards all samples were stored at 40 C. and 50 C. for 3 months. Then the colour stability was assessed by calculating the b* values by measuring the L*a*b* values (CIELAB system) at t0 and after 3 months storage, which is an indicator of the discoloration of the sample.

[0068] The viscosity has been determined by Brookfield viscometer, at 25 C., 10 rpm.

TABLE-US-00001 TABLE 1 Phase Ingredient trade Name INCI Name % A WATER DEM AQUA Add 100 A Glycerin 1,23 (86.5%) Ph. Eur GLYCERIN 3.00 A Euxyl PE 9010 PHENOXYETHANOL; ETHYLHEXYLGLYCERIN 1.00 A PENTAVITIN SACCHARIDE ISOMERATE; AQUA; CITRIC 3.00 ACID; SODIUM CITRATE B Myritol 318 CAPRYLIC/CAPRIC TRIGLYCERIDE 5.00 Polymers (see Table 2) X % (see table 2) C Natriumhydroxid 10% Solution SODIUM HYDROXIDE; AQUA Up to pH 5.5 C Citric Acid 25% solution CITRIC ACID; AQUA Up to pH 5.5

TABLE-US-00002 TABLE 2 Concentration of polymers used in the formula (table 1) and results Trial 1 Trial 2 Trial 4 Trial 5 Trial 6 Trial 7 Polymers INCI % Aristoflex AVC AMMONIUM ACRYLOYLDIMETHYL- 1 0.5 0.3 TAURATE/VP COPOLYMER Aristoflex HMB AMMONIUM 1 0.5 0.3 ACRYLOYLDIMETHYLTAURATE/ BEHENETH-25 METHACRYLATE CROSSPOLYMER Sepinov EMT 10 HYDROXYETHYL ACRYLATE/ 0.5 0.5 0.7 0.7 SODIUM ACRYLOYLDIMETHYL- TAURATE COPOLYMER Viscosity 25 C. 29400 23100 21720 16160 17000 12800 (mPa .Math. s) b* 40 C. 2.49 1.27 1.22 1.17 0.97 0.89 b* 50 C. 5.47 3.02 2.85 2.76 2.55 2.33

[0069] As can be retrieved from the data outlined in table 2, the partly replacement of an ammonium acryloyldimethyltaurate polymer by a sodium acryloyldimethyltaurate polymer results in a significantly reduced discoloration of the respective composition.