Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions – Polymer containing
Reexamination Certificate
1996-10-16
2001-03-13
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
Polymer containing
C424S070110, C424S070310, C514S778000, C514S780000, C514S782000
Reexamination Certificate
active
06200554
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to conditioning shampoo compositions which provide improved hair conditioning performance. These compositions comprise a detersive surfactant, select ethoxylated fatty alcohols, and a hair conditioning agent having a selectively large particle size.
BACKGROUND OF THE INVENTION
Conditioning shampoos comprising various combinations of detersive surfactant and hair conditioning agents are known. These shampoo products typically comprise an anionic detersive surfactant in combination with a conditioning agent such as silicone, hydrocarbon oil, fatty esters, or combinations thereof. These shampoos have become more popular among consumers as a means of conveniently obtaining hair conditioning and hair cleansing performance all from a single hair care product.
Many conditioning shampoos, however, do not provide sufficient deposition of conditioning agents onto hair during the shampooing process. Without such deposition, large proportions of conditioning agent are rinsed away during the shampooing process and therefore provide little or no conditioning benefit. Without sufficient deposition of the conditioning agent on the hair, relatively high levels of conditioning agents may be needed in the shampoo composition to provide adequate hair conditioning performance. Such high levels of a conditioning agent can substantially increase raw material cost.
Obtaining good deposition of a conditioning agent onto hair is further complicated by the action of detersive surfactants in the shampoo. Detersive surfactants are designed to carry away or remove, oil, grease, dirt, and particulate matter from the hair and scalp. In doing so, the detersive surfactants can also interfere with deposition of the conditioning agent, and carry away both deposited and non deposited conditioning agent during rinsing. This further reduces deposition of the conditioning agent onto the hair after rinsing, thus further reducing hair conditioning performance.
One known method for improving deposition of a hair conditioning agent onto hair involves the use of certain cationic deposition polymers. These polymers provide improved deposition of the conditioning agent onto hair, and can also inherently provide improved wet hair conditioning independent of such improved deposition. These cationic polymers, however, introduce compatibility problems when formulating with anionic shampoo components, and can also cause wet hair to feel excessively smooth or over conditioned. Moreover, these cationic deposition polymers are most effective when used with smaller particle conditioning agents having an average particle size of less than 5 um, more typically less than about 2 um. Deposition of large particle silicone conditioning systems are not typically improved by the use of cationic polymers.
It has now been found that shampoo compositions containing select ethoxylated fatty alcohols can be used to improve the deposition of a conditioning agent onto hair or skin, without the reliance upon cationic deposition polymers, provided that the hair or skin conditioning agent is in the form of large dispersed particles having an average particle size of at least 5 um. These select ethoxylated fatty alcohols are especially effective at improving deposition of dispersed hair conditioning agents onto hair or skin when used in combination with an anionic detersive surfactant in a shampoo or other surfactant composition. These select fatty alcohol ethoxylates have from about 5 to about 150 moles of ethoxylation, and an attached fatty alcohol moiety having from about 6 to about 30 carbon atoms.
It is therefore an object of the present invention to provide a conditioning shampoo composition for use on hair or skin with improved conditioning performance, and further to provide such a composition with improved deposition of dispersed conditioning agents onto hair or skin without reliance upon cationic deposition polymers, and further to provide such a composition with improved deposition of dispersed conditioning agent particles having an average particle size of from about 5 microns up to about 2000 microns. It is yet another object of the present invention to provide a conditioning shampoo composition with improved conditioning performance using select ethoxylated fatty alcohols.
SUMMARY OF THE INVENTION
The present invention relates to a conditioning shampoo composition for use on hair or skin, which comprises:
(a) from about 5% to about 50% by weight of a detersive surfactant selected from the group consisting of anionic surfactants, nonionic surfactants, amphoteric surfactants, zwitterionic surfactants, and mixtures thereof;
(b) from about 0.1% to about 10% by weight of an ethoxylated fatty alcohol having a fatty alcohol moiety containing from about 6 to about 30 carbon atoms and an ethoxylate chain having from about 5 to about 150 moles of ethoxylation;
(c) from about 0.01% to about 20% by weight of dispersed particles of a nonvolatile conditioning agent having an average particle size of from about 5 um to about 2000 um; and
(d) from about 20% to about 94.85% by weight water.
The present invention also relates to methods of cleansing and conditioning hair or skin by using the composition herein. For hair care applications, the average particle size of the conditioning agent should range from about 5 um to about 500 um, and for skin care applications the average particle size of the conditioning agent preferably ranges from about 500 um to about 2000 um.
DETAILED DESCRIPTION OF THE INVENTION
The shampoo compositions of the present invention are aqueous systems comprising a detersive surfactant, select ethoxylated fatty alcohols, and hair conditioning agents having a selectively large particle size. Each of these components are described in detail hereinafter. 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 as any of the additional or optional ingredients, components, or limitations described herein.
All percentages, parts and ratios are based upon 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.
Detersive Surfactant
The shampoo compositions of the present invention comprise a detersive surfactant suitable for use on hair or skin. Suitable surfactants include anionic surfactants, nonionic surfactants, amphoteric surfactants, zwitterionic surfactants, or mixtures thereof. The purpose of the detersive surfactant is to provide cleansing performance to the composition. The term detersive surfactant, as used herein, is intended to distinguish these surfactants from surfactants which are primarily emulsifying surfactants, i.e. surfactants which provide an emulsifying benefit and which have low cleansing performance. It is recognized that most surfactants have both detersive and emulsifying properties. It is not intended to exclude emulsifying surfactants from the present invention, provided the surfactant also possesses sufficient detersive properties to be useful herein.
Concentrations of the surfactant in the shampoo composition range from about 5% to about 50%, preferably from about 8% to about 30%, and more preferably from about 10% to about 25%, by weight of the composition.
Anionic Surfactants
Anionic surfactants useful herein include alkyl and alkyl ether sulfates. These materials have the respective formulae ROSO
3
M and RO(C
2
H
4
O)
x
SO
3
M, wherein R is alkyl or alkenyl of from about 8 to about 30 carbon atoms, x is 1 to about 10, and M is hydrogen or a cation such as ammonium, alkanolammonium (e.g., triethanolammonium), a monovalent metal cation (e.g., sodium and potassium), or a polyvalent metal cation (e.g., magnesium and calcium). Preferably, M should be chosen such that th
Coffindaffer Timothy Woodrow
Okuyama Yoshinari
Schroeder John Gregory
Uchiyama Hirotaka
Yeoh Thean Yeow
Channavajjala Lakshmi
Elandjian Lucy
Page Thurman K.
The Procter & Gamble & Company
Tucker Joan B.
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