Liquid cleansing composition comprising soluble, lamellar phase inducing structurant and method thereof

• US 5,952,286 A
• Filed: 01/27/1997
• Issued: 09/14/1999
• Est. Priority Date: 08/07/1995
• Status: Expired due to Term

• Current Assignee: Lever Brothers Company (Unilever PLC)
• Original Assignee: Lever Brothers Company (Unilever PLC)
• Inventors: Puvvada, Sudhakar, Kolodziej, Richard, Villa, Virgilio
• Primary Examiner(s): OGDEN JR, NECHOLUS
• Application Number:
  US08/789,726
• Time in Patent Office: 960 Days
• Field of Search: 510/130, 510/131, 510/122, 510/125, 510/123, 510/463, 510/124, 510/424, 510/417, 510/422, 510/426, 510/403, 510/428, 510/466, 424/70, 424/489, 424/562, 424/846, 424/70.1, 134/40
• US Class Current: 510/417
• CPC Class Codes: A61K 2800/596 Mixtures of surface active compounds
• CPC Class Codes: A61K 8/0295 Liquid crystals
• CPC Class Codes: A61K 8/342 Alcohols having more than seven atoms in an unbroken chain
• CPC Class Codes: A61K 8/361 Carboxylic acids having more than seven carbon atoms in an unbroken chain; Salts or anhydrides thereof
• CPC Class Codes: A61K 8/37 Esters of carboxylic acids
• 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: A61Q 19/10 Washing or bathing preparations

Abstract

The present invention relates to lamellar phase compositions comprising defined surfactant systems and a structurant selected from the group consisting of liquid fatty acids liquid alcohols and derivatives thereof which structurant is responsible for inducing the lamellar phrase. The invention also relates to a method of inducing said lamellar phase in such compositions by adding the defined structurant.

Claims

1. A method for inducing a lamellar phase in a liquid cleansing composition comprising:

(a) 5% to 50% by wt. of a surfactant system comprising;

(i) an anionic surfactant selected from the group consisting of acyl isethionates, alkyl sulfates, alkyl carboxylates, alkyl sulfosuccinates, alkyl phosphates and mixtures thereof; and

(ii) an amphoteric and/or zwitterionic surfactant selected from the group consisting of amphoacetates, betaines and mixtures thereof; and

(b) 1 to 20% by wt. emollient, even where said emollient and a structurant defined in (b)(i) and (b)(ii) below are the same;

which method comprises adding about 0.1 to 15% by wt. of a structurant selected from the group consisting of;

(i) C₈ to C₂₄ unsaturated and/or branched liquid fatty acid selected from the group consisting of oleic acid and isostearic acid;

or an ester derivative of said fatty acid selected from the group consisting of propylene glycol isostearate, propylene glycol oleate, glyceryl isostearate, glyceryl oleate, and polyglyceryl diisostearate; and

(ii) oleyl alcohol or ether thereof;

wherein said structurant has a melting point below about 25°

C.

2. A method according to claim 1, wherein the surfactant system further comprises nonionic surfactant or mixture of nonionic surfactants.

3. A method according to claim 1, wherein the emollient is silicone.

4. A method according to claim 1, wherein the emollient is vegetable oil.

5. A method according to claim 1, wherein the emollient is an ester.