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`UTILITY
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`PATENT APPLICATION
`David Scott Dunlap et a . _"
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`TRANSMITTAL
`Title
`SI—LAMPOOS PROVIDING A SUPERIOR COMBINATIO mg: 5
`ANTI-DANDRUFF EFFICACY AND CONDITIONING 010 E .
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`NAME Andrew A Paul--Box 325
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`"Express Mail" mailing label number E K449213021US
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`"LVPI'CSS Mall" mailing label number IIKé-WZ erUZIUS
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`Signature of Person mallin_ application
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`P&G Case7546M
`
`SHAMPOOS PROVIDING A SUPERIOR COMBINATION
`
`OF ANTI-DANDRUFF EFFICACY AND CONDITIONING
`
`David Scott Dunlop
`
`Roberta Atwood Boyd
`
`Susan Marie Guskey
`
`James Robert Schwartz
`
`Anthony Raymond Marchetta
`
`TECHNICAL FIELD OF THE INVENTION
`
`The present invention relates to shampoo compositions which provide a superior combination
`
`of anti—dandruff efficacy and conditioning.
`
`These compositions contain anionic surfactants,
`
`conditioning agents, anti-dandruff agents, cationic polymers, and water. These anti-dandruff and
`
`conditioning shampoo compositions exhibit (a) at least a certain bioavailability/coverage index value,
`
`(b)
`
`less than or equal
`
`to a certain first conditioning index value,
`
`(c) at
`
`least a certain second
`
`conditioning index value, and (d) at least a certain minimal inhibitory concentration index value, as
`defined herein.
`
`BACKGROUND OF THE INVENTION
`
`Shampoo compositions comprising various combinations of detersive surfactants and
`
`conditioning agents, especially silicone conditioning agents, are known in the art and are commercially
`
`available. Many of these compositions have been found to provide excellent hair cleansing and
`
`conditioning performance. For example, Pantene® Shampoo Plus Pro~Vitamin Conditioner-in-One
`
`formulas which contain anionic surfactants, a cationic polymer and silicone conditioning agents provide
`
`excellent cleaning, conditioning and hair feel benefits upon application to hair.
`
`Anti-dandruff shampoos are also well known in the art and are also commercially available.
`
`Anti—dandruff shampoos typically incorporate an anti-dandruff active and detersive surfactants. Among
`
`the preferred type of anti—dandruff agents are particulate, crystalline anti-dandruff agents, such as
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`sulfur, selenium disulfide and heavy metal salts of pyridinethione. Soluble anti-dandruff agents, such
`
`as ketoconazole, are also known in the art,
`
`Anti—dandruff shampoos which also provide conditioning benefits are likewise known in the
`
`art.
`
`For example, U.S. Pat. No. 5,624,666 exemplifies and claims shampoo compositions, which
`
`contain anionic surfactants, cationic polymers and zinc pyridinethione, as an anti—dandruff agent. U.S.
`
`Pat. No. 5,624,666 teaches that conditioning agents such as silicone fluids can optionally be
`
`incorporated into the compositions therein. Head & Shoulders® Dandruff Shampoo Plus Conditioner
`
`is an example of a marketed product which provides both anti-dandruff and conditioning benefits upon
`
`application of the shampoo to hair.
`
`Nevertheless, some consumers desire a shampoo which provides a superior combination of
`
`anti—dandruff efficacy and conditioning performance versus currently marketed products.
`
`Such a
`
`superior combination of efficacy and conditioning can be difficult to achieve.
`
`For example, one way to achieve excellent conditioning benefits is to employ a fairly high
`
`level of cationic polymer in the shampoo composition. However, the use of high levels of cationic
`
`polymer can affect the characteristics of the coacervate formed between the cationic polymer and the
`
`anionic surfactant in a manner which negatively impacts the deposition of the anti—dandruff active on
`
`the hair and scalp. Thus,
`
`it has heretofore been believed that the level of cationic polymer had to be
`
`balanced to provide the best balance of conditioning and anti-dandruff efficacy.
`
`Also by way of example, it was previously believed that excellent anti-dandruff efficacy could
`
`be achieved by utilizing a coacervate to deposit anti-dandruff actives on the hair and scalp.
`
`Unfortunately, the use of coacervates to deposit anti—dandruff actives on the hair or scalp can negatively
`
`affect conditioning, specifically clean hair feel.
`
`In order to achieve good conditioning, the level of anti-
`
`dandruff agent could be reduced, resulting in good conditioning, but less than optimal anti-dandruff
`
`efficacy.
`
`Applicants have now discovered, however, that, surprisingly, bioavailabilifl and coverage of
`
`the anti-dandruff active are much more predictive of efficacy than deposition of the active on the hair
`
`or scalp.
`
`In fact, Applicants have found that,
`
`in some cases, even when an anti-dandruff active
`
`deposited very well on the hair and scalp, acceptable anti—dandruff efficacy was not achieved.
`
`Conversely, good anti-dandruff efficacy could be achieved in situations where the anti-dandruff active
`
`had good coverage and was highly bioavailable, but did not deposit superiorly to the hair or scalp.
`
`Thus, in order for a shampoo composition to provide a superior combination of anti-dandruff efficacy
`
`and conditioning compared to known shampoo compositions, it must meet certain criteria with respect
`
`to bioavailability and coverage, but it does not necessarily have to have the ability to deposit the anti-
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`dandruff active superiorly on the hair or scalp.
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`Applicants have found that four requirements must be satisfied in order to provide shampoo
`
`compositions which provide a superior combination of efficacy and conditioning. Particularly, (1)
`
`bioavailability and coverage of the anti—dandruff active are important to anti-dandruff efficacy; (2)
`
`comb-ability of wet hair and (3) clean hair feel are important to the consumer perception of well-
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`conditioned hair; and (4) the inherent ability of the anti-dandruff active to inhibit the growth of
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`microorganisms has an impact on the anti—dandruff efficacy as well as overall consumer acceptance of
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`the shampoo product.
`
`Whether or not the requisite criteria are met for a given shampoo composition depends on a
`
`number of aspects of the shampoo formulation including, for example, the level and type of cationic
`
`polymer employed in the composition, the type of anti-dandruff agent employed, the amount of anionic
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`surfactant employed, the level and type of polyalkylene glycol employed, if any, and the rheological
`characteristics of the coacervate’.
`
`It is an object of the present invention to provide shampoo compositions, which provide a
`
`superior combination of anti-dandruff efficacy and conditioning.
`
`It is also an object of the present
`
`invention to provide a method for cleansing and conditioning the hair. These, and other objects, will
`
`become readily apparent from the detailed description below.
`
`SUMMARY OF THE INVENTION
`
`The present invention relates to a shampoo composition comprising: (A) from about 5% to
`
`about 50%, by weight, of an anionic surfactant; (B) from about 0.01% to about 10%, by weight, of a
`
`non~volatile conditioning agent; (C) from about 0.1% to about 4%, by weight, of an anti-dandruff
`
`agent; (D) from about 0.02% to about 5%, by weight, of at least one cationic polymer; and (E) water.
`
`The composition (A) has a bioavailability/coverage index value, as defined herein, of at least about
`
`1.25; (B) has a first conditioning index value, as defined herein, of less than or equal to about 1.0; (C)
`
`has a second conditioning index value, as defined herein, of at least about 1.5; and (D) has a minimal
`
`inhibitory concentration index value, as defined herein, of at least about 0.125.
`
`The present invention further relates to a method for providing anti-dandruff efficacy and
`
`conditioning hair comprising applying to the hair and scalp an amount of the above—described
`
`composition which is effective to provide such benefits.
`
`DETAILED DESCRIPTION OF THE INVENTION
`
`The shampoo compositions of the present invention provide a superior combination of anti-
`
`dandruff efficacy and conditioning. Such anti-dandruff and conditioning shampoo compositions can
`
`comprise, consist of, or consist essentially of the essential elements and limitations of the invention
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`described herein, as well as any of the additional or optional ingredients, components or limitations
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`described herein.
`
`Particularly,
`
`these compositions comprise anionic surfactants, conditioning agents, anti-
`
`dandruff agents, cationic polymers, and water. More particularly, these compositions exhibit certain
`
`characteristics which are measured by four indecies, defined herein.
`
`The shampoo compositions of the present invention have a bioavailability/coverage index value
`
`of at least about 1.25, preferably at least about 1.5, more preferably at least about 2.0. This index is
`
`indicative of anti-dandruff efficacy. Generally, the higher the index value of the composition, the better
`
`its anti-dandruff efficacy, due to more bioavailable anti-dandruff agent,
`
`increased coverage of anti-
`
`dandruff agent, or both. Applicants have discovered that, surprisingly, bioavailability and coverage of the
`
`anti-dandruff active are much more predictive of efficacy than deposition of the active on the hair or
`
`scalp.
`
`ln fact, Applicants have found that,
`
`in some cases, even when an antidandruff active deposited
`
`very well on the hair and scalp, acceptable anti—dandruff efficacy was not achieved. Conversely, good
`
`anti—dandruff efficacy could be achieved in situations where the anti-dandruff active had good coverage
`
`and was highly bioavailable, but did not deposit superiorly to the hair or scalp.
`
`Applicants believe that there are a number of ways to increase the bioavailability of the anti—
`
`dandruff active. For example, the composition can be formulated (as hereinafter described) such that the
`
`anti—dandruff active is present on the surface of the coacervate (i.e.,
`
`loosely associated with the
`
`coacervate) rather than integrated into or encapsulated by the coacervate. Another way to increase
`
`bioavailability of the anti-dandruff active is to formulate the composition (as hereinafter described) such
`
`that the coacervate is spreadable or
`
`flowable (rather than elastic) to increase the bioavailability of any
`
`anti-dandruff active that is integrated into or encapsulated by the coacervate.
`
`The shampoo compositions of the present invention have a first conditioning index value of less
`
`than or equal to about 1.0, preferably less than or equal to about 0.96, more preferably less than or equal
`
`to about 0.94, most preferably less than or equal to about 0.91. This index is indicative of conditioning,
`
`as realized by consumers of the shampoo composition. Generally, the lower the index value of the
`
`composition, the better its conditioning, due to easier to comb and less tangled wet hair.
`
`The shampoo compositions of the present invention have a second conditioning index value of
`
`at least about 1.5, preferably at least about 1.75, more preferably at least about 2.0, still more preferably
`
`at least about 2.25, most preferably at least about 2.5. This index is indicative of conditioning, as realized
`
`by consumers of the shampoo composition. Generally, the higher the index value of the composition, the
`
`better its conditioning, due to increased clean hair feel.
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`'55
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`The shampoo compositions of the present invention have a minimal inhibitory concentration
`
`index value of at least about 0.125, preferably at least about 0.25, more preferably at least about 0.5.
`
`This index is
`
`indicative of anti-dandruff efficacy. Generally,
`
`the higher the index value of the
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`composition, the better its anti-dandruff efficacy, due to increased inherent ability of the anti-dandruff
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`agent to inhibit the growth of microorganisms.
`
`The components, including those which may optionally be added, of the shampoo compositions
`
`of the present invention, as well as methods for preparation, methods for use are described in detail
`
`below. Also, methods for assessing the four indecies are described in detail.
`
`The anti-dandruff and conditioning shampoo compositions of the present invention comprise an
`
`anionic surfactant, a conditioning agent, an anti-dandruff agent, a cationic polymer, and water. Each of
`
`I. Components
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`20
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`these ingredients is described in detail below.
`
`A. Anionic surfactant
`
`
`
`The anti-dandruff and conditioning shampoo compositions of the present invention comprise
`
`from about 5% to about 50%, by weight of the composition, preferably from about 8% to about 30%,
`
`more preferably from about l0% to about 25%, most preferably from about 12% to about 18%, of an
`
`anionic detersive surfactant component suitable for application to the hair or skin. The anionic
`
`detersive surfactant
`
`is believed to provide cleaning and lather performance to the composition.
`
`Additionally, the anionic detersive surfactant forms a coacervate, upon aqueous dilution, with the
`
`cationic polymer component (described below) of the present invention. This coacervate is believed to
`
`be important in providing the efficacy and conditioning benefits described herein.
`
`The anionic detersive surfactant component can comprise an anionic detersive surfactant, a
`
`zwitterionic or an amphoteric detersive surfactant having an attached moiety that is anionic at the pH of
`
`40
`
`the composition, or a combination thereof; preferably an anionic detersive surfactant. Such surfactants
`
`should be physically and chemically compatible with the essential components described herein, and
`
`should not otherwise unduly impair product stability, aesthetics or performance. Examples of anionic
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`45
`
`detersive surfactants which may be suitably employed in the shampoo compositions herein include, but
`are not limited to: sulfates, sulfonates, sarcosinates and sarcosine derivatives.
`1. Sulfates
`
`Preferred anionic detersive surfactants for use in the anti-dandruff and conditioning shampoo
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`50
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`compositions of the present invention are the alkyl and alkyl ether sulfates. These surfactants have the
`
`respective formulae ROSOSM and R(CZH40)XOSOSM, wherein R is alkyl or alkenyl from about C3 to
`
`about C‘s, x is an integer having a value from 1
`
`to 10, and M is a cation selected from the group
`
`55
`
`consisting of electropositive covalently bonded moieties (e.g. ammonium), alkanolamines (e.g.
`
`triethanolamine), monovalent metals (e.g. sodium or potassium), polyvalent metal cations (cg.
`
`magnesium and calcium) and mixtures thereof. The cation M should be selected such that the anionic
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`detersive surfactant component is water soluble. Solubility of the surfactant will depend upon the
`
`particular anionic detersive surfactants and cations chosen.
`
`Preferably, R is from about C8 to about C”, more preferably from about C10 to about C16, most
`
`preferably from about C12 to about C”,
`
`in both the alkyl and alkyl ether sulfates. The alkyl ether
`
`sulfates are typically made as condensation products of ethylene oxide and monohydric alcohols from
`
`about C8 to about C34. The alcohols can be synthetic or they can be derived from fats, e.g., coconut oil,
`
`palm kernel oil, and tallow. Lauryl alcohol and straight chain alcohols derived from coconut oil or
`
`palm kernel oil are preferred. Such alcohols are reacted with from 0 to about 10, preferably from about
`
`2 to about 5, most preferably about 3, moles of ethylene oxide. The resulting mixture of molecular
`
`species will have, for example, an average of 3 moles of ethylene oxide per mole of alcohol, and is
`sulfated and neutralized.
`
`Non—limiting examples of alkyl ether sulfates which may be used in the shampoo compositions
`
`of the present invention include sodium and ammonium salts of coconut alkyl triethylene glycol ether
`
`sulfate,
`
`tallow alkyl
`
`triethylene glycol ether sulfate, and tallow alkyl hexaoxyethylene sulfate.
`
`Preferred alkyl ether sulfates are those comprising a mixture of individual compounds, wherein the
`
`compounds in the mixture have an average alkyl chain length from about Clo to about C,6 and an
`
`average degree of ethoxylation of from about 1 to about 4 moles of ethylene oxide.
`
`Specific examples of preferred alkyl sulfates include, but are not limited to, ammonium lauryl
`
`sulfate, ammonium cocoyl sulfate, potassium lauryl sulfate, potassium cocoyl sulfate, sodium lauryl
`
`sulfate, sodium cocoyl sulfate, monoethanolamine lauryl sulfate, monoethanolamine cocoyl sulfate,
`
`diethanolamine lauryl sulfate, triethanolamine lauryl sulfate, triethylamine lauryl sulfate, and mixtures
`
`thereof. Especially preferred is ammonium lauryl sulfate.
`
`Specific examples of preferred alkyl ether sulfates include, but are not limited to, ammonium
`
`laureth sulfate, potassium laureth sulfate, sodium laureth sulfate, monoethanolamine laureth sulfate,
`
`diethanolamine laureth sulfate,
`
`triethanolamine laureth sulfate,
`
`triethylamine laureth sulfate, and
`
`mixtures thereof. Especially preferred is ammonium laureth sulfate.
`
`Still another class of sulfate surfactants suitable for use in the for use in the anti-dandruff and
`
`conditioning shampoos of the present
`
`invention are the sulfated glycerides, an example of which
`
`includes, but is not limited to, lauric monoglyceride sodium sulfate.
`2. Sulfonates
`
`Also suitable for use in the anti-dandruff and conditioning shampoos of the present invention
`
`are those anionic detersive surfactants known as olefin sulfonates. As used herein, the term "olefin
`
`sulfonates" refers to compounds which can be produced by the sulfonation of oc-olefins by means of
`
`uncomplexed sulfur trioxide, followed by neutralization of the acid reaction mixture in conditions such
`
`that any sulfones which have been formed in the reaction are hydrolyzed to give the corresponding
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`hydroxy-alkanesulfonates. The sulfur trioxide can be liquid or gaseous, and is usually, but not
`
`necessarily, diluted by inert diluents, for example by liquid SOZ, chlorinated hydrocarbons, and the like,
`
`when used in the liquid form, or by air, nitrogen. gaseous 803, and the like, when used in the gaseous
`
`form. The or—olefins from which the olefin sulfonates are derived are mono-olefins which are from
`
`about Clo to about C24, preferably from about C12 to about C [6‘ Preferably, they are straight chain
`
`olefins.
`
`in addition to the true alkene sulfonates and a proportion of hydroxy-alkanesulfonates, the
`
`olefin sulfonates can contain minor amounts of other materials, such as alkene disulfonates depending
`
`upon the reaction conditions, proportion of reactants, the nature of the starting olefins and impurities in
`
`the olefin stock and side reactions during the sulfonation process. A non-limiting example of such an
`
`or-olefin sulfonate mixture is described in US. Pat. No. 3,332,880, which description is incorporated
`
`herein by reference.
`
`Another class of sulfonates suitable for use in the anti—dandruff and conditioning shampoo
`
`compositions of the present
`
`invention are those anionic detersive surfactants known as B-alkyloxy
`
`alkane sulfonates. These surfactants conform to the general Formula (1):
`
`0R2 H
`
`R1
`
`503M
`
`where R' is a straight chain alkyl group from about C6 to about C20, R2 is a lower alkyl group from
`
`about C , to about C3, preferably C1, and M is a water-soluble cation, as described above.
`
`Still other sulfonates suitable for use in the anti-dandruff and conditioning shampoo
`
`compositions of the present
`
`invention are those anionic detersive surfactants known as alkyl aryl
`
`sulfonates. Non-limiting examples of alkyl aryl sulfonates include sodium tridecyl benzene sulfonate,
`
`sodium dodecyl benzene sulfonate, and mixtures thereof.
`
`Other suitable sulfonates for use in the anti-dandruff and conditioning shampoos of the present
`
`invention are the water-soluble salts of organic, sulfuric acid reaction products conforming to the
`
`formula [ R’-SO3-M ] where R' is a straight or branched chain, saturated, aliphatic hydrocarbon radical
`
`from about C8 to about C24, preferably about C,0 to about Cm; and M is a cation described above. Non-
`
`limiting examples of such anionic detersive surfactants are the salts of an organic sulfuric acid reaction
`
`product of a hydrocarbon of the methane series, including ism, new, and n—paraffins, and a sulfonating
`
`55
`
`agent, e.g., 503, H2504, obtained according to known sulfonation methods. The sulfonation methods
`
`may include bleaching and hydrolysis. The salts are preferably from about C8 to about C24; more
`
`9
`
`

`

`preferably from about C,2 to about Cm. Preferred are alkali metal and ammonium sulfonated Cl0 to CH5
`
`n-paraffins.
`
`Still other suitable sulfonates for use in the anti-dandruff and conditioning shampoo
`
`compositions of the present invention are the reaction products of fatty acids, which are esterified with
`
`isethionic acid, and then neutralized with sodium hydroxide. Preferred fatty acids are those derived
`
`from coconut oil or palm kernel oil. Also suitable are the sodium or potassium salts of fatty acid
`
`amides of methyl tauride in which the fatty acids are derived from coconut oil or palm kernel oil. Other
`
`similar anionic surfactants are described in US. Pat. No. 2,486,921; US. Pat. No. 2,486,922; and US.
`
`Pat. No. 2,396,278, which descriptions are incorporated herein by reference.
`
`Other sulfonates suitable for use in the antivdandruff and conditioning shampoo compositions
`
`of the present invention are the succinnates, examples of which include, but are not limited to, disodium
`
`N-octadecylsulfosuccinate, disodium lauryl
`
`sulfosuccinate, diammonium lauryl
`
`sulfosuccinate,
`
`tetrasodium N-(1,2-dicarboxyethyl)-N-octadecylsulfosuccinnate, diamyl ester of sodium sulfosuccinic
`
`acid, dihexyl ester of sodium sulfosuccinic acid, dioctyl esters of sodium sulfosuccinic acid, and
`mixtures thereof.
`
`3. Sarcosinates and sarcosine derivatives
`
`Also suitable for use in the anti-dandruff and conditioning shampoos of the present invention
`
`are those anionic detersive surfactants known as sarcosinates and sarcosine derivatives. Sarcosinates
`
`are the derivatives of sarcosine and N-methyl glycine, acylated with a fatty acid chloride, They conform
`
`to the general Formula (11):
`
`O I
`
`l
`R—— C— 114—— CH2— (3— o— o— x
`CH3
`
`wherein RC0- is a fatty acid radical and wherein X is either hydrogen (acid form) or a cationic species,
`
`such as Na+ or TEA+ (salt form). Non-limiting examples of sarcosinates and sarcosine derivatives
`
`include: sodium lauryl sarcosinate,
`
`lauryl sarcosine, cocoyl sarcosine, and mixtures thereof. A
`
`preferred sarcosinate is sodium lauryl sarcosinate.
`
`B. Conditioning agent
`
`The anti-dandruff and conditioning shampoo compositions of the present invention comprise
`
`from about 0.01% to about 10%, by weight of the composition, preferably from about 0.1% to about
`
`8%, more preferably from about 0.1% to about 5%, most preferably from about 0.2% to about 3.5%, of
`
`
`
`10
`
`15
`
`20
`
`25
`
`9.) VI
`
`40
`
`45
`
`50
`
`55
`
`10
`
`10
`
`

`

`10
`
`15
`
`
`
`40
`
`45
`
`50
`
`55
`
`a conditioning agent suitable for application to the hair or skin.
`
`It is believed that the conditioning
`
`agent provides improved conditioning benefits to the hair, particularly clean hair feel and wet rinse feel.
`
`The conditioning agent comprises a water insoluble, water dispersible, non-volatile, liquid that
`
`forms emulsified, liquid particles or are solubilized by the surfactant micelles. in the anionic detersive
`
`surfactant component (described above). Suitable conditioning agents for use in the shampoo
`
`composition are those conditioning agents characterized generally as silicones (e.g. silicone oils,
`
`cationic silicones, silicone gums, high refractive silicones, and silicone resins), organic conditioning
`
`oils (e.g. hydrocarbon oils, polyolefins, and fatty esters) or combinations thereof, or those conditioning
`
`agents which otherwise form liquid, dispersed, particles in the aqueous surfactant matrix herein. Such
`
`conditioning agents should be physically and chemically compatible with the essential components of
`
`the composition, and should not otherwise unduly impair product stability, aesthetics or performance.
`
`The concentration of the conditioning agent in the shampoo composition should be sufficient
`
`to provide the desired conditioning benefits, and as will be apparent to one of ordinary skill in the art.
`
`Such concentration can vary with the conditioning agent, the conditioning performance desired, the
`
`average size of the conditioning agent particles, the type and concentration of other components, and
`other like factors.
`
`1. Silicones
`
`The conditioning agent of the anti-dandruff and conditioning shampoo compositions of the
`
`present invention is preferably an insoluble silicone conditioning agent. The silicone conditioning agent
`
`particles may comprise volatile silicone, non-volatile silicone, or combinations thereof. Preferred are
`
`non~volati1e silicone conditioning agents. If volatile silicones are present, it will typically be incidental
`
`to their use as a solvent or carrier for commercially available forms of non-volatile silicone materials
`
`ingredients, such as silicone gums and resins. The silicone conditioning agent particles may comprise a
`
`silicone fluid conditioning agent and may also comprise other ingredients, such as a silicone resin to
`
`improve silicone fluid deposition efficiency or enhance glossiness of the hair (especially when high
`
`refractive index (e.g. above about 1.46) silicone conditioning agents are used (e.g. highly phenylated
`
`silicones).
`
`The concentration of the silicone conditioning agent typically ranges from about 0.01% to
`
`about 10%, by weight of the composition, preferably from about 0.1% to about 8%, more preferably
`
`from about 0.1% to about 5%, most preferably from about 0.2% to about 3%. Non~limiting examples
`
`of suitable silicone conditioning agents, and optional suspending agents for the silicone, are described
`
`in US. Reissue Pat. No. 34,584, US. Pat. No. 5,104,646, and US. Pat. No. 5,106,609, which
`
`descriptions are incorporated herein by reference. The silicone conditioning agents for use in the anti—
`
`dandruff and conditioning shampoo compositions of the present invention preferably have a viscosity,
`
`as measured at 25°C, from about 20 to about 2,000,000 centistokes (“csk”), more preferably from about
`
`11-
`
`11
`
`

`

`10
`
`1,000 to about 1,800,000 csk, even more preferably from about 50,000 to about 1,500,000 csk, most
`
`preferably from about 100,000 to about 1,500,000 csk.
`
`The dispersed, silicone conditioning agent particles typically have a number average particle
`
`diameter ranging from about 0.01pm to about 50pm. For small particle application to hair, the number
`
`average particle diameters typically range from about 0.01pm to about 4pm, preferably from about
`
`0.01pm to about 2pm, more preferably from about 0.01pm to about 0.5pm.
`
`For larger particle
`
`application to hair, the number average partic