Soap bars comprising insoluble multivalent ion soap complexes

• US 20060270572A1
• Filed: 05/31/2005
• Published: 11/30/2006
• Est. Priority Date: 05/31/2005
• Status: Active Grant

• Current Assignee: Conopco (Unilever PLC)
• Original Assignee: Conopco (Unilever PLC)
• Inventors: Subramanian, Vivek, Shah, Pravin
• Granted Patent: US 7,662,761 B2
• Time in Patent Office: Days
• US Class Current: 510/141
• CPC Class Codes: C11D 17/006 containing mainly surfactants, but no builders, e.g. syndet bar
• CPC Class Codes: C11D 9/002 Non alkali-metal soaps
• CPC Class Codes: C11D 9/10 Salts

Abstract

The invention relates to novel bar compositions comprising complexes formed from interaction of multivalent ions and soap. The insoluble complexes permit greater solid contents which counterintuitively, enhance lather (i.e., even if soluble soap is complexed, it is believed more can be used). Further, the complexes enhance rate of wear, hardness, mildness and deposition. The invention further comprises process for enhancing benefits by adding multivalent ions to soap stock during processing.

Claims

1. A bar composition comprising:

(a) 40 to 80% by wt. fatty acid soap;

(b) less than 3% by wt. synthetic surfactant;

(c) 0 to 30% by wt. structurant;

(d) 5 to 16% by wt. water;

wherein 8 to 60% by wt. of said bar comprises a complex formed from the interaction of soluble soap and multivalent ion;

wherein composition comprises less than 2% by wt. builder;

wherein compositions is substantially enzyme free;

wherein said multivalent ion does not comprise magnesium.

3. A bar composition according to claim 1, wherein fatty acid soap comprises mixture of C₁₆ to C₂₄ long chain length C₈-C₁₄ and short chain length soaps.

5. A bar composition according to claim 1, wherein said soluble soap which interacts with multivalent ion is soluble, saturated C₈ to C₁₄ soap and/or unsaturated soap.

6. A process to enhance lather, mildness, rate of wear and hardness in a bar which process comprises adding complex inducing multivalent ion to bar compositions of claim 1.

2. (canceled)

4. (canceled)