BAR COMPOSITION COMPRISING THERMOCHROMIC PIGMENT OR DYE SIGNALLING BENEFIT AGENT RELEASE OR OTHER USE

• US 20080261843A1
• Filed: 04/18/2007
• Published: 10/23/2008
• Est. Priority Date: 04/18/2007
• Status: Active Grant

• Current Assignee: Conopco, Inc. (Unilever PLC)
• Original Assignee: Conopco, Inc. (Unilever PLC)
• Inventors: Subramanian, Vivek, Lee, Christine Marie Nixon, Brennan, Michael Augustine
• Granted Patent: US 7,659,236 B2
• Time in Patent Office: Days
• US Class Current: 510/146
• CPC Class Codes: C11D 1/02 Anionic compounds C11D1/002, C11D1/004, C11D1/008 take precedence
• CPC Class Codes: C11D 1/38 Cationic compounds C11D1/002, C11D1/004, C11D1/008 take precedence
• CPC Class Codes: C11D 1/65 Mixtures of anionic with cationic compounds
• CPC Class Codes: C11D 1/66 Non-ionic compounds C11D1/002, C11D1/004, C11D1/008 take precedence
• CPC Class Codes: C11D 1/83 Mixtures of non-ionic with anionic compounds
• CPC Class Codes: C11D 1/835 Mixtures of non-ionic with cationic compounds
• CPC Class Codes: C11D 1/86 Mixtures of anionic, cationic, and non-ionic compounds
• CPC Class Codes: C11D 17/0047 Detergents in the form of bars or tablets
• CPC Class Codes: C11D 17/006 containing mainly surfactants, but no builders, e.g. syndet bar
• CPC Class Codes: C11D 3/40 Dyes ; Pigments
• CPC Class Codes: C11D 9/267 containing free fatty acids
• CPC Class Codes: C11D 9/444 Dyes; Pigments

Abstract

The invention relates to bar compositions comprising thermochromatic pigment or dye signaling temperature and/or benefit agent release. In a preferred embodiment, the pigment is introduced in the form of a separate domain (e.g., separate chips) which separate chip or chips is combined with a surfactant-containing chips to form the final bar.

Claims

1. Solid bar composition comprising:

(a) 5 to 85% by vt. of a surfactant selected from the group consisting of anionic surfactant, nonionic surfactant, amphoteric surfactant, cationic surfactant and mixtures thereof;

(b) 0 to 50% by wt. bar structurant;

(c) 0 to 30% by wt. free fatty acid;

(d) 0.1 to 10% by wt. thermochromatic pigment or dye; and

(e) 0 to 25% benefit agent.

2. A composition according to claim 1, wherein said pigment is dispersed uniformly throughout the bar.

3. A composition according to claim 1, wherein said pigment is found in localized or concentrated regions or domains through the bar.

4. A composition according to claim 1, additionally comprising 1-25% mildness enhancer.

5. A composition according to claim 4, wherein said enhancer is alkali metal isethionate.

6. A composition according to claim 3, wherein said concentrated regions are in the form of one or more dye-containing chips used in the production of said bar.

7. A bar composition made by combining chip compositions comprising:

(a) 5 to 40% by wt. chips comprising concentrated amounts of dye; and

(b) 95 to 60% chips comprising surfactant, wherein said chips (a) and (b) are combined to form a final bar composition in which the dye is found in the final bar in concentrated regions defined by the chips of (a).

8. A composition according to claim 7, wherein the chip of subparagraph 7(a) comprises:

(a) 40 to 99.9% by wt. chip composition soluble structurant material;

(b) 0 to 40% by wt. chip composition of a benefit agent;

(c) 0.1 to 25% by wt. chip composition thermochromatic pigment (dye); and

(d) 0 to 10% by wt. chip composition water.

9. A composition according to claim 7, wherein the surfactant-containing chips of subparagraph 7(b) comprise substantially no thermochromatic pigment surfactant-containing.