Aqueous surfactant compositions with a high viscosity

• US 6,008,261 A
• Filed: 04/29/1997
• Issued: 12/28/1999
• Est. Priority Date: 05/03/1996
• Status: Expired due to Term

• Current Assignee: Condea Augusta S.p.A. (Sasol Limited)
• Original Assignee: Condea Augusta S.p.A. (Sasol Limited)
• Inventors: Bozzeda, Edy, Montesion, Filippo, Genova, Calogero
• Primary Examiner(s): Lovering, Richard D.
• Assistant Examiner(s): Metzmaier, Daniel S.
• Application Number:
  US08/848,191
• Time in Patent Office: 973 Days
• Field of Search: 252/354, 516/58, 516/64, 516/70, 516/73, 516/74, 516/75, 516/909, 516/913, 516/918, 516/920, 510/535, 510/536, 510/126, 510/127, 510/130, 510/138, 510/235, 510/237, 424/70.19, 424/70.21, 424/70.24, 424/70.31
• US Class Current: 516/58
• CPC Class Codes: A61K 2800/596 Mixtures of surface active compounds
• CPC Class Codes: A61K 8/37 Esters of carboxylic acids
• CPC Class Codes: A61K 8/442 substituted by amido group(s)
• CPC Class Codes: A61K 8/463 containing sulfuric acid derivatives, e.g. sodium lauryl sulfate
• CPC Class Codes: A61Q 19/10 Washing or bathing preparations
• CPC Class Codes: A61Q 5/02 Preparations for cleaning the hair
• CPC Class Codes: C11D 1/02 Anionic compounds C11D1/002, C11D1/004, C11D1/008 take precedence
• CPC Class Codes: C11D 1/90 Betaines
• CPC Class Codes: C11D 1/94 Mixtures with anionic, cationic or non-ionic compounds
• CPC Class Codes: C11D 17/003 Colloidal solutions, e.g. gels; Thixotropic solutions or pastes
• CPC Class Codes: C11D 3/2086 Hydroxy carboxylic acids-salts thereof
• CPC Class Codes: Y10S 516/909 The agent contains organic compound containing sulfoxy*
• CPC Class Codes: Y10S 516/918 The compound contains carboxylic acid ester group

Abstract

Aqueous surfactant compositions, with a high viscosity, comprising an anionic surfactant or a mixture of anionic surfactants, an alkyl ester of lactic acid or a mixture of alkyl esters of lactic acid and, optionally, an electrolyte. The above compositions can be used for the preparation of liquid detergents, either transparent or translucent, opaque or pearly, for use as "personal care" products, domestic detergents, car detergents.

Claims

1. Aqueous surfactant compositions consisting of:

(a) 4%-50% by weight of an anionic surfactant, alkyl betaines or mixtures thereof;

(b) 0.1%-10% by weight of an alkyl ester of lactic acid or a mixture of alkyl esters of lactic acid having the formula (I);

##STR5## wherein R represents a C₄ -C₂₀ alkyl group, linear or branched;

an aryl group having the formula (II);

##STR6## wherein R'"'"' represents a C₄ -C₂₀ alkyl group, linear or branched;

an alkylethoxylic group having the formula (III);

space="preserve" listing-type="equation">R"--(--O--CH.sub.2 --CH.sub.2 --).sub.n -- (III)

wherein R" represents a C₆ -C₂₀ alkyl group, linear or branched and n is an integer or an average number from 1 to 20;

(c) 0%-2.5% by weight of an electrolyte;

the complement to 100% by weight consisting of water.