Personal cleansing composition

Patent metadata

Field	Value
Publication number	US-2021069079-A1
Application number	US-201816640824-A
Country	US
Kind code	A1
Filing date	Aug 22, 2018
Priority date	Aug 25, 2017
Publication date	Mar 11, 2021
Grant date	—

Abstract

Disclosed are water-based personal cleansing compositions having an isotropic surfactant phase, the compositions containing (a) cationic surfactant that includes a quaternary ammonium compound and/or an amidoamine, (b) cleansing surfactant and (c) water, the cleansing surfactant containing 85 to 100% by weight of a combination of betaine surfactant and taurate surfactant in particular ratios; also disclosed are methods of thickening such compositions by the addition of electrolyte.

First claim

1 . A personal cleansing composition comprising:
a) a cationic surfactant comprising a quaternary ammonium compound and/or an amidoamine b) 5 to 15 wt. % cleansing surfactant, and c) water, wherein: the cleansing surfactant contains from 85 to 100% by weight of a combination of betaine surfactant and taurate surfactant, and wherein: when the composition contains 5 to 6 weight percent of cleansing surfactant, the weight ratio of betaine surfactant to taurate surfactant is from 55:45 to 45:55; when composition contains from greater than 6 weight percent to up to 10 weight percent of cleansing surfactant, the weight ratio of betaine surfactant to taurate surfactant is from 80:20; to 40:60; and when the composition contains greater than 10 weight percent of cleansing surfactant, the weight ratio of betaine surfactant to taurate surfactant is from 80:20: to 20:80.

2 . The personal cleansing composition according to claim 1 wherein the quaternary ammonium compound includes one to three long chain alkyl groups having an ester, ether or amido inter-chain linkage, wherein said alkyl groups are saturated or unsaturated.

3 . The personal cleansing composition according to claim 1 wherein the quaternary ammonium compound comprises a mono- and/or dialkyl quat.

4 . The personal cleansing composition according to claim 1 wherein the betaine surfactant is an amidobetaine and the taurate surfactant is an acyl taurate.

5 . The personal cleansing composition according to claim 1 wherein the betaine surfactant comprises cocamidopropyl betaine and the taurate surfactant comprises sodium methyl cocoyl taurate.

6 . The personal cleansing composition according to claim 1 wherein the composition comprises from 6 to 12 wt. % of cleansing surfactant, based on the total weight of the composition.

7 . The personal cleansing composition according to claim 1 wherein the composition has an isotropic surfactant phase.

8 . The personal cleansing composition according to claim 1 wherein the composition is essentially free of sulfate surfactant.

9 . The personal cleansing composition according to claim 1 that is transparent.

10 . The personal cleansing composition according to claim 1 that has a pH of 4 to 6.

11 . The personal cleansing composition according to claim 1 that is essentially free of (meth)acrylate polymers and copolymers.

12 . The personal cleansing composition according to claim 1 that further comprises electrolyte.

13 . A method of adjusting the viscosity of a composition, the method comprising the steps of:
I) providing a composition according to claim 1 ; and II) adding electrolyte to the composition, wherein the addition of electrolyte increases the viscosity of the resulting composition.

14 . The personal cleansing composition according to claim 1 wherein the quaternary ammonium compound is of the formula:
N + R 1 R 2 R 3 R 4 X −   (I)

wherein R 1 , R 2 , R 3 and R 4 are independently, hydrogen, benzyl or C1 to C30 alkyl, and wherein one, two or three of R 1 , R 2 , R 3 and R 4 are independently C6 to C30 alkyl and the remaining R 1 , R 2 , R 3 and R 4 group or groups are hydrogen, benzyl or C1 to C4 alkyl, and
X is a solubilizing anion.

15 . The personal cleansing composition according to claim 1 wherein the cationic surfactant is an amidoquat of the formula:
CH 3 (CH 2 ) r C(O)NH(CH 2 ) t N + R 13 R 14 R 15 X 1−   (IA)

where r is 5 to 24,
t is 2 or 3, and
R 13 , R 14 , and R 15 are independently C1 to C4 alkyl, and
X 1 is a solubilizing anion.

16 . The personal cleansing composition according to claim 1 wherein the cationic surfactant is an amidoamine of the formula:
R 5 R 6 N—(CH 2 ) x —NHC(O)R 7   (II)

where R 5 and R 6 are independently methyl or ethyl,
x is 2 or 3, and
R 7 is C6 to C30 alkyl.

17 . The personal cleansing composition according to claim 1 wherein the taurate surfactant is an acyl taurate represented by the general formula:
R 8 C(O)N(R 9 )(CH 2 ) y SO 3 M  (IIIa)

where R 8 is C6 to C30 alkyl,
y is 2 or 3,
R 9 is hydrogen or methyl, and
M is a solubilizing cation.

18 . The personal cleansing composition according to claim 17 wherein y is 2.

19 . The personal cleansing composition according to claim 1 wherein the betaine surfactant is represented by the general formula:
R 10 [C(O)NH—(CH 2 ) y ] z —N + (R 11 )(R 12 )CH 2 CO 2 −   (IV)

where R 10 is C6 to C30 alkyl,
z is 0 or 1,
R 11 and R 12 are independently alkyl, hydroxyalkyl or carboxyalkyl of 1 to 3 carbon atoms, and
y is 2 or 3; and salts thereof.

20 . The personal cleansing composition according to claim 19 wherein R 11 and R 12 are methyl.

Assignees

• Conopco Inc Dba Unilever

Inventors

• Trentini Massimiliano
• Thompson Helen Diane
• Bentley Christopher David
• Coan Lynsey Joanne

Classifications

• C11D1/90

  Betaines · CPC title

• C11D1/645

  Mixtures of compounds all of which are cationic · CPC title

• C11D1/62

  Quaternary ammonium compounds · CPC title

• A61K8/416 Primary

  Quaternary ammonium compounds (A61K8/35 takes precedence) · CPC title

• A61K8/466

  containing sulfonic acid derivatives; Salts · CPC title