J3733
FORM - 2
THE PATENTS ACT, 1970
(39 of 1970)
&
The Patents Rules, 2003
COMPLETE SPECIFICATION
(See Section 10 and Rule 13)
COMPOSITIONS FOR WASHING AND CONDITIONING HAIR
HINDUSTAN LEVER LIMITED, a company incorporated under
the Indian Companies Act, 1913 and having its registered office
at Hindustan Lever House, 165/166, Backbay Reclamation,
Mumbai -400 020, Maharashtra, India
The following specification particularly describes the invention and the manner in which it is to be performed.

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COMPOSITIONS FOR WASHING AND CONDITIONING HAIR
Technical Field 5
The invention is concerned with rinse-off hair-conditioning compositions which are applied to the hair or body and then substantially rinsed away. It is particularly concerned
with hair shampoo compositions and shower gels, which both
10 clean the hair and provide conditioning benefit to the hair.
More specifically, it is concerned with hair-washing
compositions which have the effect of providing low friction
and ease of combing to the hair when dry.
15 Background and Prior Art
-
Compositions which provide a combination of cleansing and
conditioning to the hair are know in the art. Such shampoo
or shower-gel compositions typically comprise one or more
20 surfactants for shampooing or cleansing purposes and one or more conditioning agents. Typically, these conditioning agents are water-insoluble oily materials, cationic polymers or cationic surfactants. One purpose of the conditioning agent is to make the hair easier to comb when wet and more
25 manageable when dry, e.g. less static and fly-away. Another important role, especially for water-insoluble oily conditioning agents, is to provide low friction and ease of combing for dry hair.
30 It is known to incorporate cationic- polymers in hair-washing compositions. For instance. US 6,444,628 discloses an

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aqueous shampoo comprising, in addition to water, an anionic cleansing surfactant, a cationic polymer and a monoalkyl quaternary ammonium compound.
5 Such cationic polymers are often used in combination with water-insoluble conditioning oils in order to improve the deposition of the conditioning oils onto the hair. US Patent 3,753,916 discloses the use of cationic polymers as deposition aids.
10
It has now been found that by using a specific combination of cationic polymers in a hair-washing compositions which comprise small droplets of a water-insoluble oily conditioning agent, problems encountered with prior art
15 washing and conditioning compositions can be overcome. In particular, improved low friction and ease of combing can be obtained for the hair after drying, with a reduction in the heavy, greasy feel that many consumers experience when high charge density cationic polymers and oily conditioning
20 agents are combined in shampoos.
Summary of the Invention
In a first aspect, the invention provides a hair-washing 25 composition comprising
a) from 1 to 50% by weight of a cleansing surfactant,
b) from 0.01| to 0.5% by weight of a first cationic
30 polymer having a mean charge density at pH7 from 0.2
to 1.0 meg per gram,

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c) from 0.01 to 0.4% by weight of a second cationic
polymer having a mean charge density at pH7 from 1.3 to 3.0. meq per gram,

5 d) more than; 40% by weight of water, and
e) from 0.1 ,to 10% by weight of discrete, dispersed

droplets

of a water-insoluble conditioning oil with

10

a mean diameter (D3/2) of 4 micrometres or less,
characterised in that both the first cationic polymer and the second cationic polymer consist essentially of the same monomeric units.

15 Detailed Description of the Invention
By water-insoluble, it is meant that the material so described has a solubility in water at 25°C of 0.1% by weight or less. ,
20
All viscosities mentioned are kinematic viscosities unless otherwise specified, and are to be measured at 25 °C using calibrated capillary glass viscometers under gravity flow conditions.
25
All molecular weights referred to are weight average (Mw)
molecular weights unless otherwise specified. The compositions provided by the invention are aqueous compositions, used by massaging them into the hair followed
30 by rinsing with clean water prior to drying the hair.

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Optionally, a separate conditioning formulation may be applied after rinsing and before drying, but this may not be necessary as the compositions of the invention are intended to provide both cleansing and conditioning to the hair.
5
The compositions provided by the invention comprise more
i
than 40% by weight of water, preferably more than 50%, more preferably more than 65%.
10 Cleansing Surfactant
Hair-washing compositions according to the invention comprise one or more cleansing surfactants from the group which is cosmetically acceptable and suitable for topical
15 application to the hair.
Suitable cleansing surfactants, which may be used singularly or in combination,; are selected from anionic, nonionic, amphoteric and zwitterionic surfactants, and mixtures
20 thereof.
Anionic Cleansing Surfactant
Shampoo compositions according to the invention will
25 typically comprise one or more anionic cleansing surfactants which are cosmetically acceptable and suitable for topical application to the hair.
Examples of suitable anionic cleansing surfactants are the
30 alkyl sulphates, alkyl ether sulphates, alkaryl sulphonates, alkanoyl isethionates, alkyl succinates, alkyl

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sulphosuccinates, N-alkyl sarcosinates, alkyl phosphates,
alkyl ether phosphates, alkyl ether carboxylates, and alpha-
olefin sulphonates, especially their sodium, magnesium,
ammonium and mono-, di- and triethanolamine salts. The
5 alkyl and acyl groups generally contain from 8 to 18 carbon
atoms and may be unsaturated. The alkyl ether sulphates,
alkyl ether phosphates and alkyl ether carboxylates may
contain from 1 to 10 ethylene oxide or propylene oxide units
per molecule.
10
Typical anionic cleansing surfactants for use in shampoo compositions of the invention include sodium oleyl succinate,
ammonium lauryl sulphosuccinate, ammonium lauryl sulphate,
sodium dodecylbenzene sulphonate, triethanolamine
15 dodecylbenzene sulphonate, sodium cocoyl isethionate, sodium
lauryl isethionate and sodium N-lauryl sarcosinate. The most
preferred anionic surfactants are sodium lauryl sulphate, sodium lauryl ether sulphate(n)EO, (where n is from 1 to 3), ammonium lauryl sulphate and ammonium lauryl ether
20 sulphate (n)E0, (where n is from 1 to 3) .
Mixtures of any of the foregoing anionic cleansing surfactants may also be suitable.

25 The total amount of anionic cleansing surfactant in shampoo compositions of the invention is generally from generally from 0.5 to 45, preferably from 1.5 to 35, more preferably from 5 to 20 percent, by weight of the composition.

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Co-surfactant
The composition can include co-surfactants, to help impart aesthetic, physical or cleansing properties to the
5 composition.
t A preferred example is an amphoteric or zwitterionic
surfactant, which can be included in an amount ranging from 0
to about 8, preferably from 1 to 4 percent by weight of the
10 composition.
Examples of amphoteric and zwitterionic surfactants include alkyl amine oxides, alkyl betaines, alkyl amidopropyl betaines, alkyl sulphobetaines (sultaines) , alkyl glycinates,
15 alkyl carboxyglycinates, alkyl amphopropionates,
alkylamphoglycinates, alkyl amidopropyl hydroxysultaines, acyl taurates and |acyl glutamates, wherein the alkyl and acyl groups have from 8 to 19 carbon atoms. Typical amphoteric and zwitterionic surfactants for use in shampoos of the
20 invention include lauryl amine oxide; cocodimethyl sulphopropyl betaine and preferably lauryl betaine, cocamidopropyl betaine and sodium cocamphopropionate.
Another preferred example is a nonionic surfactant, which can
25 be included in an amount ranging from 0 to 8, preferably from 2 to 5 percent by weight of the composition.
For example, representative nonionic surfactants that can be included in shampoo compositions of the invention include
30 condensation products of aliphatic (C8 – C18) primary or
secondary linear or branched chain alcohols or phenols with

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alkylene oxides, usually ethylene oxide and generally having from 6 to 30 ethylene oxide groups.
Other representative nonionic surfactants include mono- or
5 di-alkyl alkanolamides. Examples include coco mono- or di-ethanolamide and coco mono-isopropanolamide.
Further nonionic surfactants which can be included in shampoo
compositions of the invention are the alkyl polyglycosides
10 (APGs). Typically, the APG is one which comprises an alkyl
group connected (optionally via a bridging group) to a block
of one or more glycosyl groups. Preferred APGs are defined
by the following formula:
15 RO - (G)n
wherein R is a branched or straight chain alkyl group which may be saturated or unsaturated and G is a saccharide group.
20 R may represent a mean alkyl chain length of from about C5 to
about C20. Preferably R represents a mean alkyl chain length
of from about C8 to about C12. Most preferably the value of R
lies between about 9.5 and about 10.5. G may be selected
from C5 or C6 monosaccharide residues, and is preferably a
25 glucoside. G may be selected from the group comprising
glucose, xylose, lactose, fructose, mannose and derivatives thereof. Preferably G is glucose.

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The degree of polymerisation; n, may have a value of from about 1 to about 10 or more. Preferably, the value of n lies from about 1.1 to about 2. Most preferably the value of n lies from about 1.3 to about 1.5.
5
Suitable alkyl polyglycosides for use in the invention are
commercially available and include for example those

materials identified as: Oramix NS10 ex Seppic; Plantaren

1200 and Plantaren 2000 ex Henkel.
10
Other sugar-derived nonionic surfactants which can be

included in compositions of the invention include the C10-C18
N-alkyl (C1-C6) polyhydroxy fatty acid amides, such as the
C12-C18 N-methyl glucamides, as described for example in
15 WO 92 06154 and US, 5 194 639, and the N-alkoxy polyhydroxy fatty acid amides, such as C10-C18 N- (3-methoxypropyl) glucamide.
The composition according to the invention can also
20 optionally include, one or more cationic co-surfactants
included in an amount ranging from 0.01 to 10, more preferably from 0.05 to 5, most preferably from 0.05 to 2 percent by weight of the composition.
25 The total amount of cleansing surfactant (including any co surfactant, and/or any emulsifier) in compositions of the invention is generally from 1 to 50, preferably from 2 to 40, more preferably from 10 to 25 percent by weight of composition.
30

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A preferred blend of cleansing surfactants is a combination of ammonium lauryl ether sulphate, ammonium lauryl sulphate, PEG 5 cocamide and cocamide MEA (CTFA designations) .
5 Cationic Polymer
Compositions according to the invention comprise from 0.01 to 0.5% by weight of a first cationic polymer having a mean charge density at pH7 from 0.2 to 1.0 meq per gram, and
10 from 0.01 to 0.4% by weight of a second cationic polymer
having a mean charge density at pH7 from 1.3 to 3.0 meq per
gram.
It is essential for the invention that both the first and
15 second cationic polymer consist essentially of the same
monomers and cationic substituents, by which it is meant
that the polymers comprise 95% or more by weight of the same
monomers. When the polymers are cationically substituted
homopolymers or copolymers, then the cationic substituent
20 must be essentially the same for each polymer, but the
degree of substitution will be different for the first and
the second homopolymer in order to give the required charge
densities for the: two cationic polymers.

25 The cationic polymers may be homopolymers which are
cationically substituted or may be formed from two or more
types of monomers. The molecular weight of each polymer will
generally be between 100 000 and 2 000 000 Dalton. The
polymers will have cationic nitrogen containing groups such
30 as quaternary ammonium or protonated amino groups, or a
mixture thereof. .If the molecular weight of the polymer is

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too low, then the conditioning effect is poor. If too high, then there may be problems of high extensional viscosity leading to stringiness of the composition when it is poured.
5 The cationic nitrogen-containing group will generally be present as a substituent on a fraction of the total monomer units of the cationic polymer. Thus when the polymer is not a homopolymer it can contain spacer non-cationic monomer units. Such polymers are described in the CTFA Cosmetic
10 Ingredient Directory, 3rd edition. The ratio of the cationic to non-cationic monomer units is selected to give polymers having a cationic charge density in the required range for
each of the first and second cationic polymers.

15 Suitable cationic polymers include, for example, copolymers of vinyl monomers having cationic amine or quaternary ammonium functionalities with water soluble spacer monomers such as (meth)acrylamide, alkyl and dialkyl (meth)acrylamides, alkyl (meth)acrylate, vinyl caprolactone
20 and vinyl pyrrolidine. The alkyl and dialkyl substituted
monomers preferably have C1-C7 alkyl groups, more preferably C1-3 alkyl groups., Other suitable spacers include vinyl esters, vinyl alcohol, maleic anhydride, propylene glycol and ethylene glycol.
25

The cationic amines can be primary, secondary or tertiary amines, depending upon the particular species and the pH of the composition. In general secondary and tertiary amines, especially tertiary, are preferred.
30

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Amine substituted vinyl monomers and amines can be polymerized in the amine form and then converted to ammonium by quaternization.
5 The cationic conditioning polymers can comprise mixtures of monomer units derived from amine- and/or quaternary ammonium-substituted monomer and/or compatible spacer monomers.
10 Suitable cationic conditioning polymers include, for example:
cationic diallyl quaternary ammonium-containing polymers
including, for example, dimethyldiallyammonium chloride
15 homopolymer and copolymers of acrylamide and
dimethyldiallylammonium chloride, referred to in the
industry (CTFA) as Polyquaternium 6 and Polyquaternium
7, respectively;
20 - mineral acid salts of amino-alkyl esters of homo-and copolymers of unsaturated carboxylic acids having from 3 to 5 carbon atoms, (as described in U.S. Patent 4,009,256) ;
25 - cationic polyacrylamides(as described in W095/22311) .
Other cationic conditioning polymers that can be used include
cationic polysaccharide polymers, such as cationic cellulose
derivatives, cationic starch derivatives, and cationic guar
30 gum derivatives.

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Cationic polysaccharide polymers suitable for use in compositions of the invention include momomers of the formula:
5 A-O-[R-N+ (R1) (R2) (R3)X-];
wherein: A is an anhydroglucose residual group, such as a starch or cellulose anhydroglucose residual. R is an alkylene, oxyalkylene, polyoxyalkylene, or hydroxyalkylene
10 group, or combination thereof. R , R and R independently
represent alkyl, aryl, alkylaryl, arylalkyl, alkoxyalkyl, or alkoxyaryl groups,, each group containing up to about 18
carbon atoms. The total number of carbon atoms for each
cationic moiety (i.e., the sum of carbon atoms in R1 , R2 and
15 R3) is preferably about 2 0 or less, and X is an anionic counterion.
Another type of cationic cellulose includes the polymeric
quaternary ammonium salts of hydroxyethyl cellulose reacted
20 with lauryl dimethyl ammonium-substituted epoxide, referred
to in the industry (CTFA) as Polyquaternium 24. These
materials are available from Amerchol Corp. (Edison, NJ,
USA) for instance under the tradename Polymer LM-200.
25 Other suitable cationic polysaccharide polymers include
quaternary nitrogen-containing cellulose ethers (e.g. as
described in U.S. Patent 3,962,418), and copolymers of
etherified cellulose and starch (e.g. as described in
U.S. Patent 3,958,581).
30

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A particularly suitable type of cationic polysaccharide polymer that can be used is a cationic guar gum derivative, such as guar hydroxypropyltrimonium chloride (commercially available from Rhone-Poulenc in their JAGUAR trademark
5 series).
The first cationic polymer will generally be present in
compositions of the invention at levels of from 0.01 to 0.5,
preferably from 0.05 to 0.4, more preferably from 0.1 to 0.3
10 percent by weight of the composition.

The second cationic polymer will generally be present in
compositions of the invention at levels of from 0.01 to 0.4,
preferably from 0.'05 to 0.35, more preferably from 0.1 to 0.3
15 percent by weight of the composition.
The cationic charge density of the polymer is suitably determined via the Kjeldahl method as described in the US Pharmacopoeia under chemical tests for nitrogen
20 determination.
It is preferred if the first and cationic polymers are both cationically substituted guar gums, both cationically substituted hydroxyethylcelluloses or both cationic
25 polyacrylamides, because of the relative ease of manufacture and wide availability of these polymers.
It is particularly preferred if both the first and second cationic polymers ,are guar hydroxypropyltrimethylammonium
30 chlorides.

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The first cationic polymer has a mean charge density from 0.2 to 1.0 meq/gm, preferably from 0.3 to 0.9 meq/gm.
The second cationic polymer has a mean charge density from
5 1.3 to 3 meq/gm, preferably from 1.4 to 2.5, more preferably from 1.5 to 1.8.
If the charge density of the second cationic polymer is higher than the specified range, it is found that the hair
10 may feel heavy or greasy. This is thought to be due to
excessive deposition of the second polymer. If the charge density of the first polymer is lower than the specified range, it is found that the wet conditioning of the composition may be inadequate.
15
Water-insoluble Conditioning Oil
i
Compositions according to the invention comprise from 0.1 to 10% by weight of a water-insoluble conditioning oil. This
20 may be a non-silicone hydrophobic oil but is more preferably a silicone conditioning agent. Preferably the conditioning agent is non-volatile, meaning that it has a vapour pressure of less than 1000 Pa at 25°C. The conditioning oil is present in the composition as discrete emulsion droplets.
25
The total amount of water-insoluble conditioning oil in compositions of the invention is preferably from 0.2% to 5%, more preferably from 0.5% to 3% by weight of the total composition.

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Emulsified hydrophobic conditioning oils for use in the shampoo or shower gel compositions of the invention suitably have Sauter mean droplet diameter (03,2) in the composition of 4 micrometres or less, preferably 2 micrometres or less,
5 more preferably 1 micrometre or less.
A suitable method for measuring the Sauter 03,2 mean diameter is by laser light scattering using an instrument such as a Malvern Mastersizer.
10
Silicone Conditioning Oil
It is preferred if the water-insoluble conditioning oil of compositions of the invention is emulsified droplets
15 comprising, preferably consisting essentially of, a silicone conditioning oil.
Suitable silicones include polydiorganosiloxanes, in particular polydimethylsiloxanes which have the CTFA
20 designation dimethicone. Also suitable for use compositions of the invention (particularly shampoos and conditioners) are polydimethyl siloxanes having hydroxyl end groups, which have the CTFA designation dimethiconol. Also suitable for use in compositions of the invention are silicone gums having a
25 slight degree of cross-linking, as are described for example in WO 96/31188.
The viscosity of the silicone itself (not the emulsion or the final hair conditioning composition) is typically from 350 to
30 200,000,000 mm sec" at 25°C. Preferably the viscosity is at

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least 5,000 mm2 sec-1 at 25 °C, more preferably at least 10,000

mm2 sec-1. Preferably the viscosity does not exceed 20,000,000

mm2 sec-1, more preferably 10,000,000 mm2 sec-1 , most preferably
5,000,000 mm2 sec-1.
5

Viscosities are generally provided by suppliers of silicones,
either as measured or as deduced from their molecular weight.

It is preferred if the silicone oil also comprises a
10 functionalised silicone. Suitable functionalised silicones include, amino-, carboxy-, betaine-, quaternary ammonium-, carbohydrate-, hydroxy- and alkoxy-substituted silicones. Preferably, the functionalised silicone contains multiple substitutions.
15

For the avoidance of doubt, as regards hydroxyl-substituted silicones, a polydimethylsiloxane merely having hydroxyl end groups (which have the CTFA designation dimethiconol) is not
considered a functionalised silicone within the definition
20 of the present invention. However, a polydimethylsiloxane having hydroxyl substitutions along the polymer chain is considered a functionalised silicone.
A preferred class of functionalised silicone for inclusion
25 in compositions of the invention is amino functional
silicone. By "amino functional silicone" is meant a
silicone containing at least one primary, secondary or
tertiary amine group, or a quaternary ammonium group.
Examples of suitable amino functional silicones include:
30 polysiloxanes having the CTFA designation "amodimethicone",

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Specific examples of amino functional silicones suitable for
use in the invention are the aminosilicone oils DC2-8220,
DC2-8166, DC2-8466, and DC2-8950-114 (all ex Dow Corning),

and GE 1149-75, (ex General Electric Silicones).
5 Suitable quaternary silicone polymers are described in EP-A-
0 530 974. A preferred quaternary silicone polymer is
K3474, ex Goldschmidt.
Another preferred functional silicone for use as a component 10 in the hydrophobic conditioning oil is an alkoxy-substituted
silicone. Such molecules are known as silicone copolyols
and have one or more polyethyleneoxide or polypropyleneoxide
groups bonded to the silicone polymer backbone, optionally
through an alkyl linking group.
15
An example of a type of silicone copolyol useful in
compositions of the invention has a molecular structure
according to the formula depicted below:
20 Si(CH3)3 [0-Si(CH3) (A)]p - [O-Si (CH3)(B)]q - 0 - Si (CH3)3
In this formula, A is an alkylene chain with from 1 to 22 carbon atoms, preferably 4 to 18, more preferably 10 to 16.
B is a group with the structure: -(R)-(EO)r(PO)s-OH wherein
25 R is a linking group, preferably an alkylene group with 1
to 3 carbon atoms. Preferably R is -(CH2)2~- The mean
values of r and s| are 5 or more, preferably 10 or more, more preferably 15 or more. It is preferred if the mean values of r and s are 100 or less. In the formula, the value of p
30 is suitably 10 or more, preferably 20 or more, more

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preferably 50 or more and most preferably 100 or more. The value of q is suitably from 1 to 20 wherein the ratio p/q is preferably 10 or more, more preferably 20 or more. The value of p + q is a number from 11 to 500, preferably from
5 50 to 300.
Suitable silicone copolyols have an HLB of 10 or less, .
preferably 7 or less, more preferably 4 or less. A suitable
silicone copolyol material is DC5200, known as Lauryl
10 PEG/PPG - 18/18 methicone (INCI name), available from Dow
Corning.
Hydrophile/Lipophile balance or HLB is a well known parameter used by those skilled in the art to characterise
15 surface active molecules and emulsifiers. Suitable methods
for the experimental determination of HLB are in Griffin
W.C, Journal of the Society of Cosmetic Chemists, volume 1 page 311 (1949). The commercially available silicone copolyols are supplied along with a value of their HLB by 20 Dow Corning.
It is preferred to use a combination of amino and nonfunctional silicones. In particular, when the water-
insoluble oil is a1 silicone oil blend, it is preferred if
25 the silicone oil blend comprises
(i) from 50 to 95% by weight of the total weight of silicone oil of a polydimethylsiloxane gum having a molecular weight of 2.00,000 unified mass units or more and

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(ii) from 5 to 50% by weight of the total weight of
silicone oil a second silicone which is an amino-
functionalised polydimethylsiloxane having a
molecular weight of less than 200,000 unified mass
5 units.
Suitable amino-functionalised silicones for such a blend are
described in EP 455,185 (Helene Curtis) and include
trimethylsilylamodimethicone as depicted below, and are
10 sufficiently water-insoluble so as to be useful in
compositions of the invention:
Si(CH3)3 - 0 - [Si(CH3)2 -O - ]x - [Si (CH3) (R - NH -CH2CH2 NH2) - 0 -]y - Si (CH3)3
15 :
i
wherein x + y is a number from about 50 to about 500, and
the mole percent amine functionality is from 0.3% to 8%, and wherein R is an alkylene group having from 2 to 5 carbon atoms. Preferably, the number x + y is from 100 to 300, and
20 the mole percent amine functionality is from 0.3% to 8%.
As expressed here, the weight percent amine functionality is measured by titrating a sample of the amino-functionalised silicone against alcoholic hydrochloric acid to the
25 bromocresol green end point. The mole percent amine is
calculated using a molecular weight of 45 (corresponding to
CH3- CH2-NH2).

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Suitably/ the mole percent amine functionality measured and calculated in this way is from 0.3% to 8%, preferably from 0.5% to 4%.
5 An example of a commercially available amino-functionalised silicone useful in the silicone component of the composition
of the invention is DC-8220 available from Dow Corning,
2 -1 which has a viscosity of 150 mm s at 25 °C and a mole
percent amine functionality of 2.0%. 10
Polydimethylsiloxane silicone gums are also a component of the preferred silicone oil blend described above.
The polydimethylsiloxane gum is present at a level of at
15 least 50 wt%, preferably at least 60 wt% based on the total weight of the silicone component.
The polydimethylsiloxane gum suitably has a viscosity of at least 5007000 mm2/sec, preferably at least 600,000 mm2/sec,
20 more preferably at least 1,000,000 mm2/sec at 25°C.
Suitably, the first silicone has a molecular weight of at least 200,000 Dalton preferably at least 400,000 Dalton, more preferably at least 500,000 Dalton.
25
Suitable silicone gums include SE30, SE54 and SE76 (ex General Electric Silicones).
The silicones may be added to the composition as a fluid and 30 subsequently emulsified, but preferably are added as pre-

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formed emulsions for ease of processing. Preferably, the pre-formed silicone emulsions additionally comprise a suitable emulsifier such as dodecylbenzenesulphonic acid, or are emulsified using the surface active block copolymer as
5 the emulsifier. A preferred form of silicone oil emulsion
is one which has been preferred by mechanical emulsification using a high shear mixer.
Non-silicone Conditioning Oil
10
Compositions according to the present invention may comprise
a dispersed, non-volatile, water-insoluble oily non-silicone
conditioning agent as the water-insoluble conditioning oil.
15 Suitable oily or fatty materials are selected from
hydrocarbon oils, fatty esters and mixtures thereof.
Straight chain hydrocarbon oils will preferably contain from about 12 to about 30 carbon atoms. Also suitable are
20 polymeric hydrocarbons of alkenyl monomers, such as C2-C6 alkenyl monomers.
Specific examples of suitable hydrocarbon oils include
paraffin oil, mineral oil, saturated and unsaturated
25 dodecane, saturated and unsaturated tridecane, saturated and unsaturated tetradecane, saturated and unsaturated pentadecane, saturated and unsaturated hexadecane, and mixtures thereof.. Branched-chain isomers of these compounds, as well as of higher chain length hydrocarbons,
30 can also be used. Another suitable material is polyisobutylene.

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Suitable fatty esters are characterised by having at least 10 carbon atoms, and include esters with hydrocarbyl chains derived from fatty acids or alcohols, Monocarboxylic acid esters include esters of alcohols and/or acids of the
5 formula R' COOR in which R' and R independently denote alkyl
or alkenyl radicals and the sum of carbon atoms in R1 and R
is at least 10, preferably at least 20. Di- and trialkyl and alkenyl esters of carboxylic acids can also be used.
10 Particularly preferred fatty esters are mono-, di- and
triglycerides, more specifically the mono-, di-, and tri-esters of glycerol and long chain carboxylic acids such as C1-C22 carboxylic acids. Preferred materials include cocoa butter, palm stearin, sunflower oil, soyabean oil and
15 coconut oil.
Preferably, the viscosity of the non-silicone conditioning
oil itself is from 350 to 10,000,000 mm2 sec-1 at 25°C. More
preferably the viscosity is at least 5,000 mm2 sec-1 at 25 °C,
20 most preferably at least 10,000 mm2 sec-1 . Preferably the
viscosity does not exceed 500,000 mm2 sec-1
Other Ingredients
25 Compositions according to the invention may contain other
ingredients suitable for use in hair cleansing and
conditioning compositions. Such ingredients include but are
not limited to fragrance, suspending agents, amino acids -

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and protein derivatives, viscosity modifiers and preservatives.
The invention will now be further illustrated by reference

5 to the following, non-limiting example

Examples
Compositions were prepared according to the formulations
10 detailed in tables 1 and 2. All ingredients are expressed

in the tables by

weight percent of the total formulation,

and as level of active ingredient.
Table 1

Ingredient Weight Percent Active
An inn-in Snrf artarlt. 10

Amphoteric Surfactant (CAPB) 3
Cationic Guar {See table 2) 0.2
Emulsified siliconei 1.5
Minors and Water to 100
15
The anionic surfactant is an Ether Sulphate (1EO), CAPB is coco amidopropylibetaine. The cationic guar is either Jaguar C17 or Jaguar C13S or a combination of the two as
detailed below in table 2. The emulsified silicone is
20 droplets of a aminosilicone (mol wt 32,000 and mole % amine
content of about 1.75%) and polydimethylsiloxane gum (mol wt 700,000 u) with a mean D3 2 droplet diameter of 1 micron.

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Table 2

Example JaguarC13S JaguarC17 Friction Deposition
A 0.2 0 25643 108
1 0.175 0.025 22827 301
2 0.15 0.05 18896 515
3 0.125 0.075 16284 583
4 0.1 0.1 18098 615
B 0 0.2 15576 659
0.25g/5 cm switches of hair which had been cleaned with a
5 solution of 14% SLES 2E0 and 2% cocoamidopropyl betaine in
water followed by[extensive rinsing; were used as the basis
for the following[analysis. The test shampoo was diluted to 1 in 10 by weight with distilled water and stirred throughout with a magnetic stirrer. 5 switches were placed in one half
10 of a petri dish. 1.5 mls of diluted shampoo was placed along the length of the switches which were then agitated in the dish for 30 seconds, followed by a rinse for 30 seconds under tap water (12° French hard) at 40°C, with a flow rate set at 3-4 litres per minute. The washing process using the test
15 shampoo solution was repeated followed again by rinsing. The switches were then allowed to dry naturally at 25° C and a relative humidity of 45 to 60%.
The amount of silicone deposited on the hair samples was
20 measured using X-ray fluorescence spectrometry (measured in parts per million I (ppm) of elemental silicon.

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The friction was measured using a laboratory technique with a commercially available texture analyser TA XT2i ex Stable
Microsystems.
5 Compositions according to Examples B and 3 were each
compared in. a home-use test against a benchmark formulation with only 0.2% Jaguar C13S corresponding to formula A. Each formulation was scored by the users for a set of performance attributes.
10
Both the examples: B and 3 were significantly preferred over the benchmark in the home-use test for the attribute "smooth feel" of the hair! (90% and 95% significance respectively). However, Example B gave a significantly (90%) poorer score
15 than the benchmark for "Greasy Scalp". By contrast; example
7 wag preferred over the benchmark (directionally but not
significantly) on greasy scalp.

The home-use test results, and the friction and deposition
20 test results, demonstrate that compositions according to the
invention are able to achieve conditioning performance
equivalent to compositions with a high charge density cationic polymer alone, yet without the negative of greasy scalp feel.

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CLAIMS
1. A hair-washing composition comprising

a) from 1 to 50% by weight of a cleansing surfactant,
b) from 0.01 to 0.5% by weight of a first cationic polymer having a mean charge density at pH7 -from 0.2 to 1.0 meg per gram,
10
c) from 0.01 to 0.4% by weight of a second cationic polymer having a mean charge density at pH7 from 1.3 to 3.0 meg per gram,
15 d) more than 40% by weight of water, and
e) from 0.1 to 10% by weight of discrete, dispersed
droplets bf a water-insoluble conditioning oil with
a mean diameter (03,2) of 4 micrometres or less,
20
characterised in that both the first cationic polymer and
the second cationic polymer consist essentially of the same
monomeric units and cationic substituents.

25 2. A composition according to claim 1 wherein the first and
second cationic polymers are both cationically substituted guar gums.

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3. A composition according to claim 2 wherein the first and second cationic polymers are both guar hydroxypropyltrimethylammonium chlorides.
5 4. A composition according to claim 1 wherein the first and second cationic polymers are both cationically substituted hydroxyethyl celluloses.
5. A composition according to claim 1 wherein the first and
10 second cationic polymers are both cationic polyacrylamides.
6. A composition according to any preceding claim wherein
the cleansing surfactant is selected from the group
consisting of anionic surfactants, amphoteric surfactants,
15 zwitterionic surfactants, nonionic surfactants and mixtures
thereof._______________________________________________________
7. A composition 'according to any preceding claim wherein
the water-insoluble conditioning oil comprises a silicone
20 oil.
8. A composition [according to claim 7 wherein the silicone
oil comprises
25 (i) from 50 to 95% by weight of the total weight of
silicone oil of a polydimethylsiloxane gum having a molecular weight of 2 00,000 unified mass units or more and
30 (ii) from 5 to 50% by weight of the total weight of
silicone oil of a second silicone which is an

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amino-functionalised polydimethylsiloxane having a molecular weight of less than 200,000 unified mass units.
5 9. A composition according to claim 8, in which the
polydimethylsiloxane gum has a viscosity of 500,000 mm2/sec
or more at 25°C
10 A composition according to claims or claim 8, in which
10 the amino-functional polydimethylsiloxane has a viscosity of
less than 500, 000 mm2/sec at 25°C.
11 A composition according to any one of claims 8 to 10, in
which the amino-functionalised silicone has a mole percent
15 amino functionality from 0.3 to 8.
12 A composition according to any of claims 8 to 11, in . which the weight ratio of the polysdimethylsiloxane gum to the amino-functional polydimethylsiloxane is from 15:1 to
20 1:1-
13. A composition according to any preceding claim, in which the water-insoluble conditioning oil is in the form of a mechanically generated emulsion.

25

14. A method of washing and conditioning hair by massaging a composition according to any preceding claim into the hair followed by rinsing prior to drying the hair.
Dated this 11th. day of May 2005