Polar solvent-in-oil emulsions and multiple emulsions

• US 6,221,927 B1
• Filed: 09/08/2000
• Issued: 04/24/2001
• Est. Priority Date: 11/08/1999
• Status: Expired due to Term

• Current Assignee: Dow, Inc.
• Original Assignee: Dow, Inc.
• Inventors: Lin, Zuchen, Schulz, William James Jr., Smith, Janet Mary
• Primary Examiner(s): Foelak, Morton
• Application Number:
  US09/657,555
• Time in Patent Office: 228 Days
• Field of Search: 521/64, 424/78.03, 524/261, 524/379, 524/386, 524/387, 524/589, 514/725
• US Class Current: 521/64
• CPC Class Codes: A61K 31/74 Synthetic polymeric materials
• CPC Class Codes: A61K 8/066 Multiple emulsions, e.g. water-in-oil-in-water
• CPC Class Codes: A61K 8/345 containing more than one hydroxy group
• CPC Class Codes: A61K 8/585 Organosilicon compounds
• CPC Class Codes: A61K 8/894 modified by a polyoxyalkylene group, e.g. cetyl dimethicone copolyol
• CPC Class Codes: A61Q 15/00 Anti-perspirants or body deodorants deodorisation of air A61L9/00
• CPC Class Codes: A61Q 19/00 Preparations for care of the skin
• CPC Class Codes: A61Q 5/00 Preparations for care of the hair

Abstract

One composition is a non-aqueous polar solvent-in-oil emulsion containing a non-aqueous polar solvent phase dispersed in a silicone oil continuous phase by an emulsifier. A second composition is a non-aqueous polar solvent-in-oil-in-water multiple emulsion of the type PS₁/O/W which contains a non-aqueous polar solvent phase PS₁ dispersed in a silicone oil as a first continuous phase of a primary emulsion PS₁/O by an emulsifier. The primary emulsion PS₁/O is dispersed in a second continuous aqueous phase W to form multiple emulsion PS₁/O/W. A third composition is a non-aqueous polar solvent-in-oil-in-non-aqueous polar solvent multiple emulsion of the type PS₁/O/PS₂ which contains a non-aqueous polar solvent phase PS₁ dispersed in a silicone oil as a first continuous phase of a primary emulsion PS₁/O by an emulsifier. The primary emulsion PS₁/O is dispersed in a second continuous non-aqueous polar solvent phase PS₂ to form multiple emulsion PS₁/O/PS₂.

Claims

1. A composition comprising a non-aqueous polar solvent-in-oil-in-non-aqueous polar solvent multiple emulsion of the type PS₁/O/PS₂ which contains a non-aqueous polar solvent phase PS₁ dispersed in a silicone oil as a first continuous phase of a primary emulsion PS₁/O by an emulsifier, the primary emulsion PS₁/O being dispersed in a second continuous non-aqueous polar solvent phase PS₂ to form the multiple emulsion PS₁/O/PS₂, the emulsifier being a crosslinked elastomeric silicone polyether constituting polymeric molecules crosslinked together to form a gel consisting of three-dimensional molecular polymeric networks containing crosslinking units between and among the polymeric molecules, the crosslinked elastomeric silicone polyether further containing and being swollen by about 65 to about 98 percent by weight of the silicone oil.

2. A composition according to claim 1 in which the non-aqueous polar solvents PS₁ and PS₂ are selected from the group consisting of monohydroxy alcohols, diols, triols, esters, and polyglycols.

3. A composition according to claim 1 in which one or both of the non-aqueous polar solvent phases PS₁ and PS₂ contain a non-aqueous polar solvent soluble active ingredient, or the first continuous phase contains an oil soluble active ingredient.

4. A composition according to claim 3 in which the non-aqueous polar solvent soluble active ingredients in the non-aqueous polar solvent phases PS₁ and PS₂ are selected from the group consisting of polar solvent soluble Vitamins, polar solvent soluble drugs, activated antiperspirant salts, and α

-hydroxy acids; and

the oil soluble active ingredient in the first continuous phase is selected from the group consisting of volatile polydimethylsiloxanes, nonvolatile polydimethylsiloxanes, fragrances, oil soluble Vitamins, oil soluble drugs, and natural oils derived from animal, vegetable, and mineral sources.

5. A product containing the composition according to claim 1, the product being selected from the group consisting of antiperspirants, deodorants, skin creams, skin care lotions, moisturizers, acne removers, wrinkle removers, facial cleansers, bath oils, perfumes, colognes, sachets, sunscreens, pre-shave lotions, after-shave lotions, liquid soaps, shaving soaps, shaving lathers, hair shampoos, hair conditioners, hair sprays, mousses, permanents, depilatories, cuticle coats, make-up, color cosmetics, foundations, blushes, lipsticks, lip balms, eyeliners, mascara, oil removers, color cosmetic removers, pharmaceuticals, biocides, herbicides, pesticides, wet-wipes, and tissue wipes.

6. A method of treating hair, skin, or underarm comprising applying to the hair, skin, or underarm, the composition according to claim 1.