Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
1999-11-24
2001-01-23
Gupta, Yogendra (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S121000, C510S122000, C510S123000, C510S127000, C510S130000, C510S135000, C510S151000, C510S152000, C510S153000, C510S155000, C510S156000, C510S242000, C510S417000, C510S434000, C510S437000, C510S466000, C510S490000
Reexamination Certificate
active
06177390
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to hair styling shampoo compositions which provide improved styling performance and improved hair feel. More particularly, the present invention relates to styling shampoo compositions which contain a detersive surfactant component and a hair styling polymer. The compositions, once applied to hair, exhibit a Hair Feel Index (HFI) of at least 0.65 and a Curl Retention Value (CRV) of at least 70.
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. Three different types of styling polymers are used to deliver styling performance: dispersible polymers, latex polymers, and hydrophobic styling polymers dispersed in a hydrophobic volatile carrier.
The first type of styling polymer is a polymer which can be dispersed in the aqueous shampoo matrix. This dispersible styling polymer may form a complex, or coacervate phase, with the detersive surfactant component in the shampoo or form a coacervate phase upon dilution. Upon dilution, the coacervate phase deposits on the hair. As the hair dries, the dispersible styling polymer entrapped in the coacervate delivers style achievement and style retention performance to the hair. Unfortunately, these dispersible styling polymers are very similar, if not identical, to the conditioning polymers used in 2-in-1 shampoo applications. As a result, when sufficient quantities are used to deliver styling performance, the resulting hair feel profile is unacceptable. The dispersible styling polymers have no inherent adhesive properties, consequently so much coacervate phase needs to be deposited on the hair to give styling performance that, after repeated usage, the hair is left overconditioned, coated, and dirty feeling.
The second type of styling polymer is a latex polymer. The latex polymer is in the form of a colloidal suspension of polymer particles in the aqueous shampoo matrix. In order to achieve adhesion between hair fibers, the glass transition temperature, or Tg, of the latex styling polymer must be significantly below room temperature. As a result, the latex styling polymers that give good styling performance have unacceptable hair feel which can be characterized as sticky and coated.
The third type of styling polymer is an adhesive, hydrophobic styling polymer. To prepare a styling shampoo with a hydrophobic styling polymer, the styling polymer is first dissolved in a volatile, water-insoluble carrier and then incorporated into the shampoo base. The water insoluble carrier thereafter helps disperse the hydrophobic styling polymer in the shampoo composition, and also helps enhance spreading of the hydrophobic styling polymer onto hair such that the polymer sets and forms welds between hair fibers. The enhanced spreading of the styling polymer onto the hair results in improved styling performance from the shampoo composition.
One method for further improving styling polymer deposition from a shampoo, utilizing either type of styling polymer, 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. The problem has been that excessive amounts of such deposition polymers can result in undesirably coated or oily wet hair feel, and can cause the hair when dry to feel dirty and have less body, less fullness.
Therefore, a need exists for styling shampoo compositions which provide good style achievement and style retention without the disadvantages of overconditioning, coated, or dirty feeling compositions. Surprisingly, the present invention provides hair styling shampoo compositions having good styling performance without being overconditioning, coated, or dirty feeling. The resulting hair styles obtained from using these compositions hold up well under the common stress conditions. Importantly, such compositions provide the benefit of allowing the user to achieve the desired style without separate style achievement products, such as mousses or gels, or to supplement their current style achievement products to more easily achieve the desired style. The styling compositions of the present invention leave the hair both feeling and looking natural. Also, these products do not have the disadvantage of causing the hair to quickly resoil.
It has been found in the present invention that compositions having certain properties, as defined by a Hair Feel Index (HFI) and a Curl Retention Value (CRV), are particularly useful for providing strong styling performance in combination with good hair feel. The hair styling compositions, when evaluated while the hair is still wet, exhibit a Hair Feel Index (HFI) of at least 0.65 and a Curl Retention Value (CRV) of at least 70. The compositions of the present invention provide the recited benefits by utilizing a hair styling polymer.
In view of the foregoing, it is therefore an object of this invention to provide styling shampoo compositions that provide good styling performance without unacceptable hair feel. It is a further object of this invention is to provide styling shampoo compositions containing a detersive surfactant component in combination with a styling polymer. It is another object of this invention to provide methods for evaluating styling performance and hair feel.
SUMMARY OF THE INVENTION
The present invention relates to 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, and combinations thereof; from about 0.1% to about 10% by weight of a hair styling polymer; and from about 40% to about 94.9% by weight of water, wherein the composition is characterized by providing a Hair Feel Index (HFI) of at least 0.65 and a Curl Retention Value (CRV) of at least 70.
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.
As used herein, the symbol “≧” means greater than or equal to.
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.
Detersive Surfactant Component
The styling shampoo compositions of the present invention comprise an detersive surfactant component to provide cleaning performance to the composition. The detersive surfactant component in turn comprises anionic detersive surfactant, zwitterionic or amphoteric detersive surfactant, 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
Desch Teresa Ann
Fritschi Lynne Anne
Guskey Susan Marie
Inman Everett Junior
Killion Stephanie Lynn
Boyer Charles
Elandjian Lucy
Gupta Yogendra
Murphy Stephen T.
Rosnell Tara M.
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