Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions
Reexamination Certificate
1999-06-25
2001-05-22
Dodson, Shelley A. (Department: 1616)
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
C424S070190, C424S070270, C424S070280, C424S401000, C514S937000
Reexamination Certificate
active
06235275
ABSTRACT:
BACKGROUND OF THE INVENTION
Traditionally hair conditioners have used a combination of cationic surfactants and long chain fatty alcohols to provide a desirable viscosity and an opaque appearance. It is generally believed that the conditioning benefit is mainly due to the deposition of lamellar gel phase formed by a mixture of alkyl cationic quaternary ammonium compound and fatty alcohol. In most U.S. conditioners dialkyl cationic quat is used, whereas monoalkyl quat is used in most European formulations. The difference between these two systems is that the dialkyl quat can form a lamellar gel phase by itself while the monoquat is too water soluble to do so alone and requires the addition of fatty alcohol to create the lamellar gel structure.
Recent results suggest that to achieve the best instrumental wet combing for conditioners, less fatty alcohol is preferred. However, it is also known that taking fatty alcohol out of the dialkyl-based conditioners results in a translucent and thin product. These attributes are considered negatives by consumers. Therefore a problem in the art has been to thicken and opacify the non-fatty alcohol containing lamellar system. In the present invention, the compositions have both high viscosity and opacity through the use of a high internal phase water-in-oil emulsion with the lamellar gel particles dispersed inside the internal water phase.
The following is a list of patents in this field.
U.S. Pat. No. 4,057,622;
U.S. Pat. No. 5,539,021;
U.S. Pat. No. 5,534,246;
EP 0435483;
JP 10137576;
U.S. Pat. No. 5,688,831;
U.S. Pat. No. 4,784,844;
EP 160430;
JP 7165529;
Japanese Patent Application Kokai 3-193718 (published Aug. 23, 1991); and
JP 2068137
The present invention is directed to new opaque conditioning water in oil emulsion compositions that are esthetically acceptable to consumers, improve the wet combing and dry combing properties of hair, leave the dry hair with satisfactory cosmetic and physical properties. These compositions are easy to rinse, and leave the hair with a soft dry feel.
SUMMARY OF THE INVENTION
The invention relates to opaque hair conditioner compositions that have a lamellar dispersion in the internal aqueous phase.
The purpose of the invention is to provide a conditioner with improved performance, that is opaque and thick, and contains no fatty alcohol to thicken and opacify system.
More specifically, the present invention relates to opaque hair conditioner compositions which are water in oil emulsions which comprise
a) about 40 to 95% aqueous phase comprising (i) water and (ii) a cationic surfactant, capable of forming lamellar dispersion, typically about 0.1 to about 10% of the aqueous phase
b) about 0.5 to about 30% oil, comprising a volatile silicone compound, a nonvolatile silicone compound, a volatile hydrocarbon compound, a nonvolatile hydrocarbon compound, or a mixture thereof.
c) about 0.1 to about 20% silicone surfactant.
d) optional compounds are those compounds that cannot form a lamellar phase alone, but can participate in the formation of a lamellar phase in the presence of cationic surfactants, in a amount of 0 to about 10%, and preferably about 0.1 to 5% by weight of the aqueous phase. Exemplary classes of such compounds includes di-long chain alkyl amines (i.e. C
10
to C
22
), long chain fatty alcohols (i.e. C
10
to C
22
), ethoxylated fatty alcohols.
The cationic surfactant is present at a most preferred range of about 1 to about 5% of the aqueous phase.
The aqueous phase is present in a range of about 70 to about 92%, most preferably at about 75 to about 90%.
Component b is present at about 3 to about 20% of the aqueous phase, most preferably at about 5 to about 15% of the aqueous phase.
The silicone surfactant is present preferably at about 0.1-15% of the aqueous phase, most preferably at about 0.1-10% of the aqueous phase.
The compositions of the invention have the following viscosity ranges measured at 80° F.: using Brookfield at T-spindle (TA or TB) at 0.5 rpm 20,000 cps to 600,000 cps; RV 4 to 6 spindle, 20 rpm, 100 cps to 20,000 cps.
Most preferably, the present invention relates to opaque hair conditioner compositions which are water in oil emulsions which comprise:
a) about 1 to about 6% cationic surfactant in the aqueous phase
b) about 0 to about 10% silicone oil or about 0 to about 10% hydrocarbon oil with the proviso that the silicone oil and the hydrocarbon oil cannot both be 0.
c) about 0.4 to about 7% silicone surfactant
The oil phase of these compositions comprises ingredients b and c. The aqueous phase comprises ingredient a.
As noted above, in the present invention, the compositions have both high viscosity and opacity through the use of a high internal phase water-in-oil emulsion with the lamellar gel particles dispersed inside the internal water phase. These compositions deliver lamellar gel phase onto the hair.
Another aspect of the invention is to provide a method of treating the hair to yield well-conditioned hair having esthetically pleasing physical properties by contacting the hair with an opaque conditioner of the present invention.
Another aspect of the invention is to provide a conditioning composition which is easy to rinse from the hair. The compositions of the invention are easy to rinse from the hair due to the presence of the lamellar dispersion.
REFERENCES:
patent: 4057622 (1977-11-01), Hase et al.
patent: 4784844 (1988-11-01), Thimineur et al.
patent: 4910013 (1990-03-01), Kanamaru et al.
patent: 5534246 (1996-07-01), Herb et al.
patent: 5539021 (1996-07-01), Pate et al.
patent: 5610187 (1997-03-01), Manning et al.
patent: 5641480 (1997-06-01), Vermeer
patent: 5658557 (1997-08-01), Bolich, Jr. et al.
patent: 5688831 (1997-11-01), El-Nokaly et al.
patent: 5753216 (1998-05-01), Leitch et al.
patent: 5951991 (1999-09-01), Wagner et al.
patent: 0160430 (1985-11-01), None
patent: 0435483 (1994-10-01), None
Chen Liang Bin
Sun Wei-Mei
Boxer Matthew
Dodson Shelley A.
Lamm Marina
Unilever Home & Personal Care USA a division of Conopco, Inc.
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