Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions – Cationic surfactant containing
Reexamination Certificate
1996-10-25
2001-06-19
Webman, Edward J. (Department: 1617)
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
Cationic surfactant containing
C424S070120, C424S070130
Reexamination Certificate
active
06248317
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to hair styling shampoo compositions which provide improved styling performance. More particularly, the present invention relates to styling shampoo compositions which contain a cationic deposition polymer and select spreading agents to improve the styling performance.
BACKGROUND OF THE INVENTION
Many hair shampoo compositions provide acceptable cleaning but provide little or no styling benefits, e.g. body, hold, stiffness. To realize such benefits, separate cleaning and styling products are often used.
Recently, hair shampoo compositions have been developed which can provide cleaning and styling performance from a single product. Many of these products contain styling polymers in a compatible shampoo base. To prepare such products, styling polymers can be dissolved in an organic solvent and then incorporated into the shampoo base. The organic solvent thereafter helps disperse the styling polymer in the shampoo composition, and also helps enhance spreading of the styling polymer onto hair such that the polymer sets and forms a thin film onto the surface of the hair shaft. The enhanced spreading of the styling polymer onto the hair results in improved styling performance from the shampoo composition.
Another method for further improving polymer deposition from a shampoo involves the use of cationic deposition polymers. These cationic deposition polymers improve the deposition efficiency of the styling polymers, which in turn also improves styling performance. The improved deposition from the cationic polymer can also allow for reduction of the amount of styling polymer formulated into the shampoo composition, thus reducing raw material costs. Cationic deposition polymers, however, can cause compatibility problems with other materials in the formulation, especially when used at higher concentrations or at relatively high cationic charge densities. Moreover, excessive amounts of such deposition polymers can result in undesirably slick or oily wet hair feel, and can cause the hair when dry to feel dirty and have less body, less fullness.
It has now been found that these water-insoluble styling polymers in volatile solvents can be rendered more effective, and potentially used at lower concentrations, when used in combination with select cationic spreading agents. It has also been found that the select cationic spreading agents provide this deposition benefit only when used in combination with these cationic deposition polymers. It is believed that the select cationic spreading agents help reduce surfactant micelle size in the shampoo composition, which either forces more of the volatile solvent out of the micelle or prevents the initial solubilization of the volatile solvent into the micelle to make it more readily available to help deposit and spread the styling polymer onto the hair. Moreover, more volatile solvent for the styling polymer is being deposited with the styling polymer, thus resulting in a less viscous droplet which spreads better. This improves the character or mophology of the deposit of the styling polymer onto the hair, while also allowing for minimal concentrations of cationic deposition polymer to be present in the composition.
In view of the foregoing, it is therefore an object of the present invention to provide a styling shampoo composition with improved styling performance. It is a further object of the present invention to improve the spreading efficiency of styling polymer from a shampoo composition containing a cationic deposition polymer, and further to provide for the improved spreading efficiency using select cationic spreading agents in combination with a water-insoluble styling polymer and a volatile solvent for the styling polymer.
SUMMARY OF THE INVENTION
The present invention is directed to hair styling shampoo compositions which comprise from about 5% to about 50% by weight of a surfactant selected from the group consisting of anionic surfactants, zwitterionic or amphoteric surfactants having an attached group that is anionic at the pH of the composition, and combinations thereof; from about 0.025% to about 3% by weight of an organic cationic polymer having a cationic charge density of from about 0.2 meq/gm to about 7 meq/gm and a molecular weight of from about 5,000 to about 10 million; from about 0.1% to about 10% by weight of a water-insoluble hair styling polymer; from about 0.1% to about 10% by weight of a solvent having a boiling point of less than about 300° C. and a water solubility at 25° C. of preferably less than about 0.2% by weight; and from about 0.05% to about 5% by weight of a non-polymeric, cationic spreading agent; and from about 22% to about 94.3% by weight of water.
It has been found that the shampoo composition of the present invention provides improved spreading efficiency of the styling polymer onto hair, thus providing improved styling performance from the shampoo composition. It has been found that the cationic spreading agent, when used in combination with the cationic deposition polymer, water-insoluble styling polymer, water-insoluble volatile solvent, and anionic surfactant, provides for improved spreading of the water-insoluble styling polymer on hair relative to comparable formulations that do not contain the cationic compound. It is believed that more volatile solvent is deposited with the water insoluble styling polymer onto the hair, but only to the extent that the solvent is available outside the surfactant micelle during the shampooing and rinsing process. It is believed that the cationic spreading agent inhibits the solubilization of the volatile solvent into the surfactant micelles, thus providing more volatile solvent outside the surfactant micelles to help with improved spreading of the styling polymer onto hair. The improved spreading of the polymer then results in improved styling performance.
DETAILED DESCRIPTION OF THE INVENTION
The shampoo compositions of the present invention can comprise, consist of, or consist essentially of the essential elements and limitations of the invention described herein, as well any of the additional or optional ingredients, components, or limitations described herein.
As used herein, the term “water-insoluble” refers to any material that has a solubility in water at 25° C. of less than about 0.5%, preferably less than about 0.3%, even more preferably less than about 0.2% by weight.
All percentages, parts and ratios are based on the total weight of the shampoo compositions of the present invention, unless otherwise specified. All such weights as they pertain to listed ingredients are based on the active level and, therefore, do not include carriers or by-products that may be included in commercially available materials, unless otherwise specified.
The styling shampoo compositions of the present invention, including the essential and some optional components thereof, are described in detail hereinafter.
Anionic Detersive Surfactant Component
The styling shampoo compositions of the present invention comprise an anionic detersive surfactant component to provide cleaning performance to the composition. The anionic detersive surfactant component in turn comprises anionic detersive surfactant, zwitterionic or amphoteric detersive surfactant which has an attached group that is anionic at the pH of the composition, or a combination thereof. Such surfactants should be physically and chemically compatible with the essential components described herein, or should not otherwise unduly impair product stability, aesthetics or performance.
Suitable anionic detersive surfactant components for use in the shampoo composition herein include those which are known for use in hair care or other personal care cleansing compositions. The concentration of the anionic surfactant component in the shampoo composition should be sufficient to provide the desired cleaning and lather performance, and generally range from about 5% to about 50%, preferably from about 8% to about 30%, more preferably from about 10% to about 25%, even more preferably fro
Guskey Susan Marie
Hill Burt Landford
Inman Everett Junior
Snyder Michael Albert
Wells Robert Lee
Matthews Armina E.
Sivik Linda M.
The Procter & Gamble & Company
Webman Edward J.
Winter William J.
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