Aqueous concentrates of isethionate, taurate and betaine

• US 20090062406A1
• Filed: 08/29/2008
• Published: 03/05/2009
• Est. Priority Date: 08/30/2007
• Status: Abandoned Application

• Current Assignee: Clariant Finance (Bvi) Limited
• Original Assignee: Clariant International AG (Clariant AG)
• Inventors: Loeffler, Matthias
• Application Number:
  US12/231,209
• Publication Number:
  US 20090062406A1
• Time in Patent Office: Days
• US Class Current: 514/785
• CPC Class Codes: A61K 2800/596 Mixtures of surface active compounds
• CPC Class Codes: A61K 8/44 Aminocarboxylic acids or derivatives thereof, e.g. aminocarboxylic acids containing sulfur; Salts; Esters or N-acylated derivatives thereof
• CPC Class Codes: A61K 8/466 containing sulfonic acid derivatives; Salts
• CPC Class Codes: A61Q 19/10 Washing or bathing preparations
• CPC Class Codes: A61Q 5/02 Preparations for cleaning the hair

Abstract

The invention provides aqueous concentrates comprising, based on the total composition,

• A) 0.1 to 8.0% by weight, preferably 3.0 to 7.0% by weight, of one or more isethionates of formula (1)

RCOOCH₂CH₂SO₃M   (1)

in which

• • R is a linear or branched alkyl group or alkenyl group and
  • M is a counterion,
• B) 0.1 to 8.0% by weight of one or more taurates of formula (2)

R¹CON(CH₃)CH₂CH₂SO₃X   (2)

in which R¹ and X have the same meaning as R and M and

• C) 0.1 to 40.0% by weight of one or more alkylbetaines of formula (3)

in which R² has the same meaning as R, with the proviso that the concentration of the sum of all surfactants with the formula 1, 2 and 3 is more than 20% by weight.

These concentrates are flowable at room temperature and are transparent and also colorless.

Claims

1. An aqueous concentrate comprising, based on the total composition,

A) 0.1 to 8.0% by weight of at least one isethionate of formula (1)

RCOOCH₂CH₂SO₃M  

 

(1)

wherein

R is a linear or branched alkyl group having 6 to 30 carbon atoms or a linear or branched mono- or polyunsaturated alkenyl group having 6 to 30 carbon atoms and

M is a counterion,

B) 0.1 to 8.0% by weight of at least one taurate of formula (2)

R¹CON(CH₃)CH₂CH₂SO₃X  

 

(2)

wherein which

R¹ is a linear or branched alkyl group having 6 to 30 carbon atoms or a linear or branched mono- or polyunsaturated alkenyl group having 6 to 30 carbon atoms and

X is a counterion,

C) 0.1 to 40.0% by weight of at least one alkylbetaine of formula (3)

2. The aqueous concentrate as claimed in claim 1, comprising compounds of formulae (1), (2) and (3), wherein R, R¹ or R² is the alkyl radical of coconut or lauryl acid.

3. The aqueous concentrate as claimed in claim 1, wherein the total amount by weight of all surfactants of formulae (1), (2) and (3) is 20 to 49%.

4. The aqueous concentrate as claimed in claim 1, wherein the total amount by weight of all surfactants of formulae (1), (2) and (3) is 25 to 35%.

5. The aqueous concentrate as claimed in claim 1, wherein the total amount by weight of all surfactants of formulae (1), (2) and (3) is 28 to 32%.

6. The aqueous concentrate as claimed in claim 1, wherein the total solids content, consisting of the surfactants of formulae (1), (2) and (3), and acids and salts, is 35 to 45% by weight.

7. The aqueous concentrate as claimed in claim 1, where the quantitative ratio of the compounds of formulae (1), (2) and (3) is 0.5 to 1.5:

0.5 to 1.5;

4.

8. The aqueous concentrate as claimed in claim 1, which has a color number of at most 60 Hazen.

9. The aqueous concentrate as claimed in claim 1, which has a transparency of at most 10 NTU.

11. A cosmetic, dermatological or pharmaceutical formulation comprising an aqueous concentrate as claimed in claim 1.

10. An aqueous concentrate comprising, based on the total composition,

A) 3.0 to 7.0% by weight of at least one isethionate of formula (1)

RCOOCH₂CH₂SO₃M  

 

(1)

wherein

R is the hydrocarbon radical of coconut acid and

M is an alkali metal ion,

B) 3.0 to 7.0% by weight of at least one taurate of formula (2)

R¹CON(CH₃)CH₂CH₂SO₃X  

 

(2)

wherein

R¹ is the hydrocarbon radical of coconut acid and

X is an alkali metal ion,

C) 15.0 to 25.0% by weight of at least one of alkylbetaine of formula (3)