Water-in-oil-in-polar solvent emulsions

• US 6,410,038 B1
• Filed: 06/14/2000
• Issued: 06/25/2002
• Est. Priority Date: 06/14/2000
• Status: Expired due to Fees

• Current Assignee: Dow Corning Corporation (Dow, Inc.)
• Original Assignee: Dow Corning Corporation (Dow, Inc.)
• Inventors: Lin, Zuchen, Schulz, William James Jr.
• Primary Examiner(s): PRYOR, ALTON NATHANIEL
• Application Number:
  US09/593,529
• Time in Patent Office: 741 Days
• Field of Search: 424/402, 424/70.12, 424/401
• US Class Current: 424/402
• CPC Class Codes: A61K 8/066 Multiple emulsions, e.g. water-in-oil-in-water
• CPC Class Codes: A61K 8/894 modified by a polyoxyalkylene group, e.g. cetyl dimethicone copolyol
• CPC Class Codes: A61K 9/113 Multiple emulsions, e.g. oil-in-water-in-oil A61K9/0026 takes precedence
• 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: C09K 23/54 Silicon compounds

Abstract

Water-in-oil-in-non-aqueous polar solvent W/O/PS type multiple emulsion contains a water phase W dispersed in an oil O as the first continuous phase of a primary emulsions W/O by an emulsifier. Primary emulsion W/O is dispersed in a second continuous non-aqueous polar solvent phase PS to form multiple emulsion W/O/PS. The emulsifier is a silicone elastomer containing polyether groups which is a network of polymeric molecules crosslinked with an α,ω-unsaturated hydrocarbon.

Claims

1. A composition comprising a water-in-oil-in-non-aqueous polar solvent W/O/PS multiple emulsion including a water phase W dispersed in an oil O first continuous phase of primary emulsion W/O by an emulsifier, the primary emulsion W/O being dispersed in a second continuous non-aqueous polar solvent phase PS to form multiple emulsion W/O/PS, the emulsifier being a silicone elastomer containing polyether groups which is a network of crosslinked polymeric molecules.

2. A composition according to claim 1 in which the emulsifier is a silicone elastomer containing acrylate/methacrylate grafted polyether groups which is a network of crosslinked polymeric molecules, or a silicone elastomer containing polyether groups and alkyl groups with at least ten carbon atoms which is a network of crosslinked polymeric molecules.

3. A composition according to claim 1 in which the non-aqueous polar solvent is a monohydroxy alcohol, a diol, a triol, a glycerol ester, or a polyglycol.

4. A composition according to claim 1 in which the oil is (i) a volatile polydimethylsiloxane, (ii) a nonvolatile polydimethylsiloxane with a viscosity of 5-1,000 centistoke (mm²/s), (iii) a fragrance, (iv) a natural organic oil derived from an animal, vegetable, or mineral source, or (v) a mixture of oils (i)-(iv).

5. A composition according to claim 1 in which the non-aqueous polar solvent contains a non-aqueous polar solvent soluble active ingredient selected from the group consisting of vitamins, activated antiperspirant salts, drugs, and α

-hydroxy acids;

the oil phase contains an oil soluble active ingredient selected from the group consisting of vitamins and drugs; and

the water phase contains a water soluble active ingredient selected from the group consisting of vitamins, activated antiperspirant salts, drugs, and α

-hydroxy acids.

6. A composition according to claim 1 in which the water phase comprises 20-95 percent by weight of the primary emulsion W/O, the oil phase comprises 15-80 percent by weight of the primary emulsion W/O, and the multiple emulsion W/O/PS comprises 0.1-80 percent by weight of primary emulsion W/O and 20-99.9 percent by weight of the non-aqueous polar solvent PS.

7. 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, facial treatments, acne removers, wrinkle removers, personal cleansers, facial cleansers, bath oils, perfumes, colognes, sachets, sunscreens, pre-shave lotions, after-shave lotions, shaving soaps, shaving lathers, hair shampoos, hair conditioners, hair sprays, mousses, permanents, depilatories, cuticle coats, make-up, color cosmetics, foundations, blushes, lipsticks, eyeliners, mascara, oil removers, color cosmetic removers, bath powders, body powders, pharmaceuticals, biocides, herbicides, pesticides, biologically active substances, cellulosic substrates, synthetic nonwoven substrates, wet-cleansing wipes, tissues, and towels.

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

9. A composition comprising a water-in-oil-in-non-aqueous polar solvent W/O/PS multiple emulsion including a water phase W dispersed in an oil O first continuous phase of primary emulsion W/O by an emulsifier, the primary emulsion W/O being dispersed in a second continuous non-aqueous polar solvent phase PS to form multiple emulsion W/O/PS, the emulsifier being a silicone elastomer containing polyether groups which is a network of polymeric molecules crosslinked with an α

,ω

-unsaturated hydrocarbon.

10. A composition according to claim 9 in which the emulsifier is a silicone elastomer containing acrylate/methacrylate grafted polyether groups which is a network of polymeric molecules crosslinked with an α

,ω

-unsaturated hydrocarbon, or a silicone elastomer containing polyether groups and alkyl groups with at least ten carbon atoms which is a network of polymeric molecules crosslinked with an α

,ω

-unsaturated hydrocarbon.

11. A composition according to claim 9 in which the non-aqueous polar solvent is a monohydroxy alcohol, a diol, a triol, a glycerol ester, or a polyglycol.

12. A composition according to claim 9 in which the oil is (i) a volatile polydimethylsiloxane, (ii) a nonvolatile polydimethylsiloxane with a viscosity of 5-1,000 centistoke (mm²/s), (iii) a fragrance, (iv) a natural organic oil derived from an animal, vegetable, or mineral source, or (v) a mixture of oils (i)-(iv).

13. A composition according to claim 9 in which the non-aqueous polar solvent contains a non-aqueous polar solvent soluble active ingredient selected from the group consisting of vitamins, activated antiperspirant salts, drugs, and α

-hydroxy acids;

the oil phase contains an oil soluble active ingredient selected from the group consisting of vitamins and drugs; and

the water phase contains a water soluble active ingredient selected from the group consisting of vitamins, activated antiperspirant salts, drugs, and α

-hydroxy acids.

14. A composition according to claim 9 in which the water phase comprises 20-95 percent by weight of the primary emulsion W/O, the oil phase comprises 15-80 percent by weight of the primary emulsion W/O, and the multiple emulsion W/O/PS comprises 0.1-80 percent by weight of primary emulsion W/O and 20-99.9 percent by weight of the non-aqueous polar solvent PS.

15. A product containing the composition according to claim 9, the product being selected from the group consisting of antiperspirants, deodorants, skin creams, skin care lotions, moisturizers, facial treatments, acne removers, wrinkle removers, personal cleansers, facial cleansers, bath oils, perfumes, colognes, sachets, sunscreens, pre-shave lotions, after-shave lotions, shaving soaps, shaving lathers, hair shampoos, hair conditioners, hair sprays, mousses, permanents, depilatories, cuticle coats, make-up, color cosmetics, foundations, blushes, lipsticks, eyeliners, mascara, oil removers, color cosmetic removers, bath powders, body powders, pharmaceuticals, biocides, herbicides, pesticides, biologically active substances, cellulosic substrates, synthetic nonwoven substrates, wet-cleansing wipes, tissues, and towels.

16. A method of treating hair, skin, or underarm, comprising applying to hair, skin, or underarm the composition according to claim 9.