Personal product compositions comprising structured benefit agent premix or delivery vehicle and providing enhanced effect of hydrophobic material separate from the structured benefit agent

• US 7,776,347 B2
• Filed: 05/22/2003
• Issued: 08/17/2010
• Est. Priority Date: 05/22/2003
• Status: Active Grant

• Current Assignee: Unilever Home & Personal Care Usa Division Of Conopco, Inc.
• Original Assignee: Unilever Home & Personal Care Usa Division Of Conopco, Inc.
• Inventors: Kerschner, Judith Lynne, O'Connor, Stephen M.
• Primary Examiner(s): Padmanabhan; Sreeni
• Assistant Examiner(s): Soroush; Layla
• Application Number:
  US10/443,394
• Publication Number:
  US 20040234468A1
• Time in Patent Office: 2,644 Days
• Field of Search: 424/401
• US Class Current: 424/401
• CPC Class Codes: A61K 8/31 Hydrocarbons
• CPC Class Codes: A61K 8/345 containing more than one hydroxy group
• CPC Class Codes: A61K 8/922 of vegetable origin
• CPC Class Codes: A61Q 13/00 Formulations or additives for perfume preparations essential oils or perfumes per se C11B9/00
• CPC Class Codes: A61Q 19/10 Washing or bathing preparations

Abstract

The present invention comprises a structured premix or “delivery vehicle” composition designed as a carrier to enhance the benefit (e.g., via enhanced deposition or other mechanism) of a separate hydrophobic benefit agent(s) (for example, perfumes, skin lightening agents, etc.), from personal product compositions (e.g., liquid and bar cleansers, creams, emulsions, hair composition, deodorant etc.). When the structured benefit agent composition is separately prepared and combined with the personal product composition (preferably while structured, premix composition is still in molten or liquid state), the personal product composition with structured benefit agent carrier provides enhanced deposition of the structured benefit agent and enhanced effect of the separate hydrophobic benefit agent(s) in or on the carrier or in the presence of structured benefit agent carrier.

Claims

1. Personal liquid wash composition comprising

(1) 1 to 99% by wt. of a surfactant material selected from the group consisting of anionic, nonionic, amphoteric, cationic surfactants and mixtures thereof;

and

(2) 0.1 to 90% of structured benefit agent composition consisting essentially of;

(a) 50.0 to 99.9% by wt. of structured benefit agent composition of one or more benefit agents wherein said benefit agent is a fat or oil selected from the group consisting of natural fats and oils;

cocao fat;

beef tallow;

lard;

hardened oil obtained by hydrogenating said oil;

synthetic, mono-, di- and triglycerides, and mixtures thereof

(b) 0.1 to 50.0% of structured benefit agent of structuring material selected from the group consisting of crystalline structurant selected from the group consisting of natural crystalline wax, synthetic crystalline waxes, and mixtures thereof,

wherein the crystal in said crystalline structuring material has an aspect ratio defined by A/B>

1, the length A being understood as the longer of the two dimensions when considering length and width, B; and

(3) separate hydrophobic benefit agent, wherein said benefit agent is a fragrance molecule;

wherein, when said structured benefit agent composition is separately formed and separately combined with said surfactant material in which the structured benefit agent composition will be used to deliver said benefit agent to a substrate there is provided enhanced benefit of the separate hydrophobic fragrance molecule benefit agent of at least 5% relative to the effect provided by the same separate hydrophobic benefit agent in the absence of structured benefit agent in the final composition.

2. A composition according to claim 1, wherein said benefit agent is sunflower seed oil.

3. A composition according to claim 1, wherein said structuring material of 2(b) is natural crystalline wax and said natural crystalline wax is selected from the group consisting of mineral waxes, petroleum based waxes, plant or vegetable waxes, animal waxes and mixtures thereof.

4. A composition according to claim 3, wherein said petroleum based wax is paraffin or microcrystalline wax.

5. A composition according to claim 3, wherein said structuring material of 2(b) is synthetic crystalline wax and said synthetic crystalline wax is selected from the group consisting of polyethylene, polymethylene, a chemically modified wax, polymerized α

-olefins and synthetic animal waxes and mixtures thereof.

6. A composition according to claim 1, wherein said structured benefit agent carrier composition is formed by combining benefit agent, and crystalline structurant at temperatures above melting point of structurant to form a molten solution prior to cooling or to combining said molten solution with said surfactant material.

7. A composition according to claim 1, wherein a large droplet is not required for high deposition.

8. A composition according to claim 7, wherein said droplet weight average diameter is less than 500 μ

m.

9. A composition according to claim 1 comprising 1 to 75% surfactant.

10. A process for forming a personal liquid product composition comprising:

(1) 1 to 99% surfactant selected from the group consisting of anionic, nonionic, amphoteric, cationic surfactants and mixtures thereof; and

(2) a structured benefit agent composition consisting essentially of;

(c) 50.0 to 99.9% by wt. of oil carrier composition of one or more benefit agents wherein said benefit agent is a fat or oil selected from the group consisting of natural fats and oils;

cocao fat;

beef tallow;

lard;

hardened oil obtained by hydrogenating said oil;

synthetic mono-, di- and triglycerides, and mixtures thereof,

with 50.0 to 0.1% structuring material selected from the group consisting of crystalline structurant selected from the group consisting of natural crystalline wax, synthetic crystalline waxes, and mixtures thereof, and

(3) separate hydrophobic benefit agent, wherein said benefit agent is a fragrance molecule

wherein the crystal in said crystalline structuring material has an aspect ratio defined by A/B>

1, the length A being understood as the longer of the two dimensions when considering length and width, B; and

wherein, when said structured benefit agent composition is separately formed and separately combined with said surfactant material in which the structured benefit agent composition will be used to deliver said benefit agent to a substrate there is provided enhanced benefit of the separate hydrophobic fragrance molecule benefit agent of at least 5% relative to the effect provided by the same separate hydrophobic benefit agent in the absence of structured benefit agent in the final composition.