Cosmetic composition

Abstract

A aqueous cosmetic composition is disclosed comprising i)at least one of amphoteric or zwitterionic surfactant; ii)at least one of O-acyl methyl isethionate anionic surfactants; and iii)an additional surfactant selected from N-acyl sarcosinates, N-acyl glutmates, N-acyl glycinates, N- acyl taurates, sulfonates, N-acyl glucosides, and mixtures thereof; wherein the composition comprises at least 70% of said amphoteric or zwitterionic surfactant by weight of the total amount of the surfactant; wherein said composition comprises less than 1.5% of inorganic salt by weight of the composition; wherein the composition is substantially free from sulphate-based surfactants.

Description

[0001] P0000889W01 CPL

[0002] 1

[0003] COSMETIC COMPOSITION

[0004] Field of the Invention

[0005] 5 This invention relates to aqueous cosmetic compositions, preferably haircare compositions.

[0006] More particularly the invention relates to sulphate free shampoos.

[0007] Background of the Invention

[0008] Hair care compositions are formulated for specific purposes, such as cleansing or conditioning benefits or a combination of the two. Preferred hair care composition will provide more benefits than simple cleansing and conditioning. Such compositions typically comprise one or more cleansing surfactants which generally aid in cleaning the hair and the scalp free of undesirable soil, particles and fatty matter.

[0009] 15 In recent years, sulphate-free shampoos have gained popularity among consumers because sulphate-free shampoos use milder surfactant and gentler cleansing action helps maintain the scalp's natural moisture balance, reducing the risk of dryness and irritation.

[0010] WO 2013 / 150300 A2 (IN NOSPEC LTD) discloses low irritating shampoo composition

[0011] 20 comprising betaine, sodium lauroyl methyl isethionate and sodium methyl oleoyl taurate.

[0012] However, the composition comprises only 50% of betaine of the total amount of surfactant.

[0013] US 2022 / 257487 A1 (LAURENT MARIE-AGNES [FR] ET AL) discloses concentrated shampoo composition comprising cocamidopropyl betaine, sodium lauroyl methyl isethionate and sodium 25 lauroyl sarcosinate. However, the composition comprises lower than 70% of cocamidopropylbetaine based on the total amount of surfactant.

[0014] However, there remains a need to develop a stable sulphate free shampoo with improved sensory.

[0015] The present inventors have now found unexpectedly a stable composition comprising the specific sulphate free surfactant system with improved sensory, particularly improved foaming performance.

[0016] 35P0000889W01 CPL

[0017] 2

[0018] of the Invention

[0019] In a first aspect, the present invention is directed to a cosmetic composition comprising:

[0020] i) at least one of amphoteric or zwitterionic surfactant;

[0021] ii) at least one of isethionate anionic surfactants; and

[0022] 5 iii) an additional surfactant selected from N-acyl sarcosinates, N-acyl glutmates, N- acyl glycinates, N-acyl taurates,, sulfonates, N-acyl glucosides, and mixtures thereof;

[0023] wherein the composition comprises at least 70% of said amphoteric or zwitterionic surfactant by weight of the total amount of the surfactant; wherein said composition comprises less than 1.5% of inorganic salt by weight of the composition; wherein the composition is substantially free from sulphate-based surfactants

[0024] All other aspects of the present invention will more readily become apparent upon considering the detailed description and examples which follow.

[0025] 15

[0026] Detailed Description of the Invention

[0027] Cosmetic Composition

[0028] By ‘a cosmetic composition’ as used herein, is meant to include a composition for topical application to skin, hair and / or scalp of mammals, especially human beings. Such a

[0029] 20 composition is generally applied on to the desired topical surface of the body for a period of time from a few seconds to up to 24 hours. When the period of time of application is low say of the order of a few seconds to a few minutes after which the composition is rinsed off with water or wiped away, such a composition is known as a cleansing composition or a wash-off composition. On the other hand, When the composition is applied for longer period of time say from several minutes to up to 24 hours and washed off usually during the process of normal personal cleaning, such a composition is known as a leave-on composition. The composition as per the present invention includes any product applied to a human body for also improving appearance, cleansing, odor control or general aesthetics. It is preferably the cosmetic composition is a rinse-off composition.

[0030] 30

[0031] Hair Care Composition

[0032] “Hair care composition”, as used herein, is meant to include a composition for topical application to hair and / or scalp of mammals, especially humans. Such a composition may be generally classified as leave-on or rinse off, and includes any product applied to a human bodyP0000889W01 CPL

[0033] 3

[0034] for also improving appearance, cleansing, odor control or general aesthetics. The composition of the present invention can be in the form of a liquid, lotion, cream, foam, scrub, gel, or bar. Non-limiting examples of such compositions include leave-on hair lotions, creams, and rinse-off shampoos, conditioners, shower gels, or toilet bar.

[0035] 5

[0036] Molecular weight

[0037] “Molecular weight”, as used herein, refers to the weight average molecular mass of a given polymer. The weight average molecular weight (WAVG MW) of a given polymer can be determined by SEC (Size Exclusion Chromatography) analysis using absolute calibration.

[0038]

[0039] “Charge density”, as used herein, refers to the number of cationic charges per weight unit of a given polymer. Cationic charge density can be calculated from the degree of substitution as described in WO 2013 / 011122, the disclosure of which is hereby incorporated by reference in 15 its entirety but especially page 8 lines 8-17. The degree of substitution is measured by 1H NMR in a solvent of deuterium oxide (D2O) and deuterium chloride (DCI) mixture. The degree of substitution measurement is generally taken without extraction. For example, for cationic guar polymer obtained by reacting with 2,3-epoxypropyltrimethylammonium chloride, the cationic charge density may be calculated from the degree of substitution using the following equation: 20

[0040] Cationic charge density in milhequivalents per gram (meq / g)= — 162 —+1 —5 —1X—DS

[0041]

[0042] The transparency of the composition is measured by Ultra-Violet / Visible ("LIV / VIS")

[0043] 25 spectrophotometry at room temperature, which determines the absorption or transmission of LIV / VIS light by a sample, using a Cary Series UV-Vis Spectrophotometer (Agilent Technologies). A lightwavelength of 600 nm has been shown to be adequate for characterizing the degree of clarity of cleansing compositions.

[0044] Miscellaneous

[0045] Except in the examples, or where otherwise explicitly indicated, all numbers in this description indicating amounts of material or conditions of reaction, physical properties of materials and / or use may optionally be understood as modified by the word “about”.

[0046] 35 All amounts are by weight of the final hair care composition, unless otherwise specified.P0000889W01 CPL

[0047] 4

[0048] It should be noted that in specifying any ranges of values, any particular upper value can be associated with any particular lower value.

[0049] For the avoidance of doubt, the word “comprising” is intended to mean “including” but not 5 necessarily “consisting of’ or “composed of”. In other words, the listed steps or options need not be exhaustive.

[0050] The disclosure of the invention as found herein is to be considered to cover all embodiments as found in the claims as being multiply dependent upon each other irrespective of the fact that claims may be found without multiple dependency or redundancy.

[0051] Where a feature is disclosed with respect to a particular aspect of the invention (for example a composition of the invention), such disclosure is also to be considered to apply to any other aspect of the invention (for example a method of the invention) mutatis mutandis.

[0052] 15

[0053] Amphoteric or zwitterionic surfactant

[0054] The composition in accordance with this invention comprises at least one of amphoteric or zwitterionic surfactant.

[0055] 20 The composition of the invention may comprise an amphoteric or zwitterionic surfactant, selected from an alkyl betaine of general formula (I)

[0056] R2-N+(CH3)2-CH2-COO- M+(I)

[0057] 25 wherein R2= C12 (Lauryl), Cocamidopropyl or Coco derived;

[0058] an alkyl hydroxy sultaine of general formula (II),

[0059] R3-N+(CH3)2-CH2-CH(OH)-CH2-SO3- M+(II)

[0060] wherein R3= C12 (Lauryl) or Coco derived;

[0061] an alkyl aminopropyl hydroxy sultaine of general formula (III),

[0062] 35 R4-CO-NH-(CH2)3-N+(CH3)2-CH2-CH(OH)-CH2-SO3- M+(III)P0000889W01 CPL

[0063] 5

[0064] wherein R4= C12 (Lauryl) or Coco derived;

[0065] an alkyl amphoacetate of general formula (IV),

[0066] 5

[0067] R5-CO-NH-(CH2)2-N(CH2-CH2-OH)(CH2-COQ- M+) (IV)

[0068] wherein R5= C12 (Lauryl) or Coco derived;

[0069] and mixtures thereof.

[0070] The amphoteric or zwitterionic surfactant may be selected from a group consisting of alkyl amine oxides, alkyl betaines, alkyl amidopropyl betaines, alkyl sulphobetaines (sultaines), alkyl amphoacetates, alkyl amphopropionates, alkyl amidopropyl hydroxysultaines, preferably wherein the alkyl group has from 8 to 19 carbon atoms.

[0071] 15

[0072] The amphoteric or zwitterionic surfactant may comprise one of betaines selected from coco dimethyl carboxymethyl betaine, cocoamidopropyl betaine (CAPB), cocobetaine, lauryl amidopropyl betaine (LAPB), oleyl betaine, lauryl dimethyl carboxymethyl betaine, lauryl dimethyl alphacarboxyethyl betaine, cetyl dimethyl carboxymethyl betaine, lauryl bis-(2- 20 hydroxyethyl) carboxymethyl betaine, steryl bis-(2-hydroxypropyl) carboxymethyl betaine, oleyl dimethyl gamma-carboxypropyl betaine, lauryl bis-(2-hydroxypropyl)alpha-carboxyethyl betaine, and mixtures thereof.

[0073] It is more preferred that the amphoteric or zwitterionic surfactant is an alkyl betaine of general 25 formula (II), preferably selected from cocoamidopropyl betaine (CAPB), lauryl amidopropyl betaine (LAPB) and mixture thereof, more preferably is lauryl amidopropyl betaine (LAPB).

[0074] The composition of the invention comprises at least 70% of the amphoteric or zwitterionic surfactant, preferably higher than 71%, by weight of the total amount of the surfactant.

[0075] It is preferred that the composition comprises from 70% to 75%, preferably from 71 to 75% of the amphoteric or zwitterionic surfactant by weight of the total amount of the surfactant.

[0076] It is preferred that the composition comprises from 3 to 20% of said amphoteric or zwitterionic 35 surfactant, preferably from 5 to 15% by weight of the composition.P0000889W01 CPL

[0077] O-acyl methyl isethionate anionic surfactants

[0078] The composition in accordance with this invention comprises at least one of O-acyl methyl isethionate anionic surfactants.

[0079] 5 O-acyl methyl isethionate anionic surfactant of the present invention can be made from single alkyl or alkene chain, or they can be mixtures of more than one alkyl or alkene chains. It has a surfactant of general formula (V).

[0080] CH;

[0081]

[0082] (V)

[0083] Preferably, R=C6-C18, more preferably C 12-C18

[0084] Suitable isethionate anionic surfactants may include sodium lauroyl methyl isethionate, sodium hydrogenated cocoyl methyl isethionate, sodium cocoyl methyl isethionate, sodium oleyl methyl isethionate, sodium stearoyl methyl isethionate, and mixture thereof.

[0085] 15 It is preferred that the isethionate anionic surfactant comprises sodium lauroyl methyl isethionate, sodium hydrogenated cocoyl methyl isethionate, sodium cocoyl methyl isethionate, and mixture thereof.

[0086] It is more preferred that the isethionate anionic surfactant comprises sodium lauroyl methyl 20 isethionate. It is furthermore preferred that the isethionate anionic surfactant is sodium lauroyl methyl isethionate.

[0087] It is preferred that the weight ratio of the amphoteric or zwitterionic surfactant to the amount of the O-acyl methyl isethionate anionic surfactant is from 1:1 to 10:1, preferably from 1:1 to 5:1, preferably from 5:4 to 5:1.

[0088] It is preferred that the weight ratio of lauryl amidopropyl betaine to the amount of sodium lauroyl methyl isethionate is from 1 : 1 to 10: 1 , preferably from 1:1 to 5: 1 , preferably from 5:4 to 5: 1.

[0089] 30 It is preferred that the weight ratio of cocoamidopropyl betaine to the amount of sodium lauroyl methyl isethionate is from 1 : 1 to 10: 1 , preferably from 1:1 to 5: 1 , preferably from 5:4 to 5: 1.P0000889W01 CPL

[0090] 7

[0091] It is preferred that the composition of the present invention comprises from 0.3 to 8.5%, preferably from 1 to 8%, more preferably from 1 to 6% of the isethionate anionic surfactant by weight of the composition.

[0092] 5 It is preferred that the composition comprises from 15 to 45%, preferably from 17 to 40% of the O-acyl methyl isethionate anionic surfactant by weight of the total amount of the surfactant.

[0093] Additional surfactant

[0094] The composition in accordance with this invention comprises an additional surfactant selected from N-acyl taurates, sulfonates, N-acyl-glucosides, , , N-acyl sarcosinates, N-acyl glutmates, N-acyl glycinates, and mixtures thereof, preferably selected from N-acyl taurates, sulfonates, N- acyl-glucosides, N-acyl sarcosinates, N-acyl glutmates and mixture thereof, more preferably selected from N-acyl taurates, sulfonates, N-acyl-glucosides, N-acyl glutmates and mixturethereof. The acyl group can be typically C8 to C18. Such surfactant is different from the 15 surfactants described above. It’s not an amphoteric or zwitterionic surfactant, or O-acyl methyl isethionate anionic surfactant.

[0095] The additional surfactant can preferably comprise N-acyl taurates. The acyl group can be typically C8 to C18.

[0096] 20

[0097] When it comprises N-acyl taurates, it is preferably including sodium methyl cocoyl taurate, sodium methyl lauroyl taurate, sodium methyl oleoyl taurate and combination thereof, more preferably sodium methyl lauroyl taurate.

[0098] 25 When it comprises N-acyl glutamates, it can include sodium cocoyl glutamate, disodium cocoyl glutamate, ammonium cocoyl glutamate, diammonium cocoyl glutamate, sodium lauroyl glutamate, disodium lauroyl glutamate, sodium cocoyl hydrolyzed wheat protein glutamate, disodium cocoyl hydrolyzed wheat protein glutamate, potassium cocoyl glutamate, dipotassium cocoyl glutamate, potassium lauroyl glutamate, dipotassium lauroyl glutamate, potassium cocoyl hydrolyzed wheat protein glutamate, dipotassium cocoyl hydrolyzed wheat protein glutamate, sodium capryloyl glutamate, disodium capryloyl glutamate, potassium capryloyl glutamate, dipotassium capryloyl glutamate, sodium undecylenoyl glutamate, disodium undecylenoyl glutamate, potassium undecylenoyl glutamate, dipotassium undecylenoyl glutamate, disodium hydrogenated tallow glutamate, sodium stearoyl glutamate, disodium 35 stearoyl glutamate, potassium stearoyl glutamate, dipotassium stearoyl glutamate, sodiumP0000889W01 CPL

[0099] 8

[0100] myristoyl glutamate, disodium myristoyl glutamate, potassium myristoyl glutamate, dipotassium myristoyl glutamate, sodium cocoyl / hydrogenated tallow glutamate, sodiumcocoyl / palmoyl / sunfloweroyl glutamate, sodium hydrogenated tallowoyl Glutamate, sodiumolivoyl glutamate, disodium olivoyl glutamate, sodium palmoyl glutamate, 5 disodium palmoylGlutamate, TEA-cocoyl glutamate, TEA-hydrogenated tallowoyl glutamate, TEA-lauroylglutamate,and mixtures thereof. Preferably, it comprises sodium cocoyl glutamate, sodium lauroyl glutamate, and mixture thereof, more preferably sodium lauroyl glutamate.

[0101] When it comprises N-acyl sarcosinates, non-limiting examples of sarcosinates can be selected from the group consisting of sodium lauroyl sarcosinate, sodium cocoyl sarcosinate, sodium myristoyl sarcosinate, TEA-cocoylsarcosinate, ammonium cocoyl sarcosinate, ammonium lauroyl sarcosinate, dimer dilinoleyl bis-lauroylglutamate / lauroylsarcosinate,d isodium lauroamphodiacetate lauroyl sarcosinate, isopropyllauroyl sarcosinate, potassium cocoyl sarcosinate, potassium lauroyl sarcosinate, sodium cocoylsarcosinate, sodium lauroyl

[0102] 15 sarcosinate, sodium myristoyl sarcosinate, sodium oleoyl sarcosinate, sodium palmitoyl sarcosinate, TEA-cocoyl sarcosinate, TEA-lauroyl sarcosinate, TEA-oleoylsarcosinate, TEA- palm kernel sarcosinate. Preferably, it comprises sodium lauroyl sarcosinate, sodium cocoyl sarcosinate, and mixture thereof, more preferably sodium lauroyl sarcosinate.

[0103] 20 The additional surfactant can comprise sulfonates, including alpha olefin sulfonates, linear alkylbenzene sulfonates, sodium lauryl glucosides hydroxypropyl sulfonate and combination thereof. Preferably, the additional surfactant comprises alpha olefin sulfonates. Such alpha olefin sulfonates preferably have a general formula R1-CH=CH-CH2-SO3'M+in which R1 is selected from linear or branched alkyl groups having from 11 to 13 carbon atoms and mixtures 25 thereof, and M is a solubilizing cation. Preferably M in this general formula is selected from alkali metal cations (such as sodium or potassium), ammonium cations and substituted ammonium cations (such as alkylammonium, alkanolammonium or glucammonium).

[0104] Commercially produced alpha olefin sulfonate anionic surfactants of this general formula may be made by sulfating C14-16 olefins derived from natural gas. The process can also yield mixtures of homologues and low levels of unreacted olefins. Particularly preferred is alpha olefin sulfonate with an average of 14-16 carbons. A suitable example of such a material is Bioterge AS40 (ex Stepan).

[0105] The additional surfactant can comprise N-acyl glucosides, non-limited examples including decyl 35 glucoside.P0000889W01 CPL

[0106] 9

[0107] It is preferred that the additional surfactant is selected from alpha olefin sulfonates, sodium methyl cocoyl taurate, sodium methyl lauroyl taurate, sodium methyl oleoyl taurate, sodium cocoyl glutamate, sodium lauroyl glutamate, sodium lauroyl sarcosinate, sodium cocoyl sarcosinate, and mixture thereof, more preferably selected from alpha olefin sulfonates, , 5 sodium methyl lauroyl taurate, sodium lauroyl glutamate, sodium lauroyl sarcosinate, and mixture thereof.

[0108] In a preferred embodiment, the composition comprises from 0.1 to 10%, preferably 0.5 to 5%, more preferably 1 to 3% of the additional surfactant by weight of the composition.

[0109] It is preferred that the composition of the present invention comprises from 0.1 to 20%, preferably from 0.2 to 17%, more preferably from 1 to 15% of the additional surfactant by weight of the total amount of surfactant in the composition.

[0110] 15 Cationic polymer

[0111] In a preferred embodiment, the composition of the present invention comprises a cationic polymer.

[0112] It is preferred that the cationic polymer has a molecular weight of from 50,000 to 5,000,000 20 g / mol and a charge density of from 0.1 to 7meg / g. It is preferred that the cationic deposition polymer has a molecular weight of from 100,000 to 4,500,000 g / mol, more preferably from 1,200,000 to 4,500,000 g / mol, furthermore preferably from 1,500,000 to 2,500,000. It is preferred that the cationic deposition polymer has a charge density of from 0.25 to 7meq / g, preferably from 0.8 to 3meq / g, more preferably from 1.5 to 2.2 meq / g.

[0113] 25

[0114] It is preferred that the cationic polymer has a molecular weight of 100,000 to 4,500,000 g / mol and a charge density of from 0.5 to 7meq / g, preferably cationic deposition polymer has a molecular weight from 1 ,200,000 to 4,500,000 g / mol and a charge density of from 0.8 to 3meq / g, preferably cationic deposition polymer has a molecular weight of from 1,200,000 to 4,500,000 g / mol and a charge density of from 1.5 to 2.2meq / g, more preferably cationic deposition polymer has a molecular weight of from 1 ,500,000 to 2,200,000 g / mol and a charge density of from 1.5 to 2.2meq / g.

[0115] It is preferred that the cationic polymer of the present invention has a molecular weight of from 35 50,000 to 5,000,000 g / mol, preferably from 100,000 to 4,500,000 g / mol, more preferably fromP0000889W01 CPL

[0116] 10

[0117] 500,000 to 4,500,000 g / mol, furthermore preferably from 1,000,000 to 2,500,000. It is preferred that the cationic polymer has a charge density of from 0.1 to 7meq / g, preferably from 0.2 to 5meq / g, preferably from 0.2 to 3meq / g, more preferably from 0.5 to 3 meq / g, preferably from 0.8 to 2.5 meq / g.

[0118] 5

[0119] It is preferred that the cationic polymer is selected from a group consisting of cationic galactomannans, cationic cellulose, dialkyldiallylammonium halide homopolymers and copolymers, (meth)acrylamidopropyl trialkylammonium halide homopolymers and copolymers, trialkylammonioethyl (meth)acrylate homopolymers and copolymers, preferably selected from a group consisting of cationic galactomannans, and (meth)acrylamidopropyl trialkylammonium halide homopolymers and copolymers, more preferably is (meth)acrylamidopropyl trialkylammonium halide homopolymers and copolymers.

[0120] When the cationic polymer is a cationic galactomannan, it can be selected from the

[0121] 15 group consisting of cationic guar, tara, cassia, locust bean and fenugreek gums, preferably cationic galactomannan gum is fenugreek gums, more preferably is cationic guar. And the cationic guar is preferably guar hydroxypropyltrimonium chloride.

[0122] The cationic polymer can be a cationic cellulose. Cationic cellulose is available, for example, 20 from the Dow Chemical Company in their LICARE JR (trademark) and LR (trademark) series of polymers, as salts of hydroxyethyl cellulose reacted with trimethyl ammonium substituted epoxide, referred to in the industry (CTFA) as Polyquaternium 10. Another type of cationic cellulose includes the polymeric quaternary ammonium salts of hydroxyethyl cellulose reacted with lauryl dimethyl ammonium-substituted epoxide, referred to in the industry (CTFA) as Polyquaternium 24. These materials are available from the Dow Chemical Company under the tradename Polymer LM-200. Most preferred is Polyquaternium 10, especially Polyquaternium 10 with a molecular weight (weight average by GPC) in the range 0.5 to 3 million Daltons and charge density in the range 0.5 to 3 meq / g. The preferred Polyquaternium 10 is available, for example, as LICARE™ JR30M from Dow Chemical.

[0123] 30

[0124] The cationic polymer can be one of dialkyldiallylammonium halide homopolymers. It comprises the repeating units (VI) as below:P0000889W01 CPL

[0125]

[0126] R1 , R2: methyl or other alkyls; Y: Cl, Br or I

[0127] Preferably, it can be one of Polyquaternium-6 (PDADMAC), Polyquaternium-7, Polyquaternium- 5 4, Polyquaternium-22 and Polyquaternium-39. More preferably it is Polyquaternium-6 (PDADMAC).

[0128] The cationic polymer can be one of (meth)acrylamidopropyl trialkylammonium halide homopolymers and copolymers. It comprises the repeating units (VII) as below:

[0129] Rs T

[0130] LHN / Jm

[0131] 7- R / " I R6

[0132]

[0133] Z (VII)

[0134] R3: H or methyl

[0135] R4, R5, R6: methyl or other alkyls

[0136] Z: Cl, Bror l

[0137] Preferably, it can be one of polyacrylamidopropyltrimonium chloride, acrylamidopropyltrimonium 15 chloride / acrylamide copolymer, polyquaternium-28, polyquaternium-43, polyquaternium-47, polyquaternium-53, polyquaternium-55, polyquaternium-69, polyquaternium-74, polyquaternium-113. Preferably it is copolymer comprising acrylamidopropyltrimonium chloride.

[0138] More preferably, it is acrylamidopropyltrimonium chloride / acrylamide copolymer. An example of a suitable copolymer is commercially available from Ashland under the trade name N-Hance SP-100®. N-Hance SP-100® has a charge density of from 1.8 to 2.2 meq / g and a molecular weight of from 1 ,800,000 to 2,200,000 g / mol.

[0139] The cationic polymer can be one of trialkylammonioethyl (meth)acrylate homopolymers and 25 copolymers. It comprises the repeating units (VIII) as below:P0000889W01 CPL

[0140] R7

[0141] ..

[0142] HNp

[0143] )

[0144] Rtf I Rio

[0145] R9 (VIII)

[0146] R7: H or methyl

[0147] R8, R9, R10: methyl or other alkyls

[0148] L: Cl, Br, I orCH3SO3

[0149] 5 Preferably, it can be one of Polyquaternium-5, Polyquaternium-11, Polyquaternium-37.

[0150] It is preferred that the cationic polymer is selected from copolymer comprising acrylamidopropyltrimonium chloride, cationic guar, and mixture thereof. More preferably the cationic polymer is acrylamidopropyltrimonium chloride / acrylamide copolymer, guar hydroxypropyltrimonium chloride, and mixture thereof, more preferably guar hydroxypropyltrimonium chloride.

[0151] The cationic polymer is preferably present in an amount of from 0.01 to 5%, more preferably from 0.05 to 2%, furthermore preferably 0.05 to 1%, most preferably from 005 to 0.5% , more 15 preferably from 0.05 to 0.25% by weight of the composition.

[0152] Inorganic salt

[0153] The composition of the present invention comprises less than 1.5% of inorganic salt by weight of the composition.

[0154] It is preferred that the composition comprises not higher than 1% of inorganic salt, preferably less than 1% by weight of the composition.

[0155] The composition may be substantially free from inorganic salt. “Substantially free from”, as used 25 herein, means that, preferably inorganic salt is present in an amount less than 0.5%, preferably less than 0.1%, more preferably less than 0.05%, and most preferably absent in the composition, by weight of the composition.P0000889W01 CPL

[0156] 13

[0157]

[0158] of

[0159] It is preferred that the composition has a percent transparency (% T) of at least 50% transmittance at 600 nm, more preferably at least 80%, even more preferably at least 90%. Preferably, it is a transparent composition.

[0160] 5

[0161]

[0162] of

[0163] It is preferred that pH of the composition of the present invention is from 3 to 7, preferably from 3.5 to 6.5.

[0164] Cosmetic composition

[0165] The composition of the invention preferably comprises a cosmetically acceptable carrier. The cosmetically acceptable carrier is such that the composition can be prepared, e.g., as a shampoo, conditioner, body wash, hand wash or face wash product, cream, lotion, gel, powder, ointment, deodorant, hand sanitiser or a soap bar and the rest of the ingredients would vary 15 accordingly. It is preferred that the cosmetically acceptable carrier comprises water.

[0166] It is preferred that the viscosity of the composition is from 1000 to 8000 mPa.s, preferably from 1000 to 6000 mPa.s, preferably from 1000 to 4000 mPa.s, when measured using a Brookfield V2 viscometer (spindle RTV5, 1 minute, 20rpm) at 30°C.

[0167] 20

[0168] It is preferred that the composition is a rinse-off composition, more preferably a hair care composition.

[0169] The composition of the present invention is substantially free from sulphate-based surfactant.

[0170] 25 “Substantially free from”, as used herein, means that, preferably sulphate-based surfactant is present in an amount less than 0.5%, preferably less than 0.1%, more preferably less than 0.05%, and most preferably absent in the composition, by weight of the composition.

[0171] It is preferred that the composition is free from cleansing surfactants which are not defined above.

[0172] Hair care

[0173] It is preferred that the cosmetic composition of the present invention is a hair care composition, more preferably is a shampoo.

[0174] 35P0000889W01 CPL

[0175] 14

[0176] Shampoo compositions for use in the invention are generally aqueous, i.e. they have water or an aqueous solution or a lyotropic liquid crystalline phase as their major component. Suitably, the shampoo composition will comprise from 50 to 98%, preferably from 60 to 92% water by weight based on the total weight of the composition. Such compositions are referred to as 5 having an aqueous base.

[0177] The hair care composition may comprise a scalp health agent to provide scalp benefits. This group of materials is varied and provides a wide range of benefits including moisturization, barrier improvement, anti-fungal, anti-microbial and anti-oxidant, anti-itch, sensates, and antidandruff, etc. It is preferred that the scalp health agent is antidandruff agent.

[0178] The anti-dandruff agents can be selected from pyridinethione salts, zinc pyrithione, copper pyrithione, coal tar, sulfur, charcoal, zinc carbonate, hydroxy pyridines such as piroctone olamine, azoles such as ketoconazole or climbazole, selenium sulfide, hinokitiol, salicylic acid, 15 and mixtures thereof.

[0179] The anti-microbial active can be selected from a group consisting of zinc pyrithione, copper pyrithione, sulfur, zinc carbonate, selenium sulfide, hinokitiol, hydroxamic acid such as caprylhydroxamic acid and benzohydroxamic acid, triclosan, whitfield's ointment, castellani's 20 paint, aluminium chloride, gentian violet, hydroxyl pyridine and wherein the hydroxyl pyridine may be piroctone olamine, ciclopirox olamine, rilopirox, MEA-Hydroxyoctyloxypyridinone, strobilurins such as azoxystrobin and metal chelators such as 1,10-phenanthroline, potassium permanganate, sodium thiosulfate, propylene glycol, oil of bitter orange, urea preparations, griseofulvin, 8-hydroxyquinoline ciloquinol, thiobendazole, thiocarbamates, haloprogin, polyenes, hydroxypyridone, morpholine, benzylamine, allylamines (such as terbinafine), tea tree oil, clove leaf oil, coriander, palmarosa, berberine, thyme red, cinnamon oil, rosemary oil, cinnamic aldehyde, citronellic acid, ichthyol pale, Sensiva SC-50, Elestab HP-100, azelaicacid, lyticase, iodopropynyl butylcarbamate (IPBC), isothiazalinones such as octyl isothiazalinone, azoles such as ketoconazole or climbazole, benzimidazole, benzothiazole, bifonazole,

[0180] 30 butaconazole nitrate, clotrimazole, croconazole, eberconazole, econazole, elubiol, fenticonazole, fluconazole, flutimazole, isoconazole, lanoconazole, metronidazole, miconazole, neticonazole, omoconazole, oxiconazole nitrate, sertaconazole, sulconazole nitrate, tioconazole, thiazole, triazoles such as terconazole and itraconazole and mixtures thereof.P0000889W01 CPL

[0181] 15

[0182] Other scalp health agents may include but are not limited to: niacinamide, glycerin, glycine, alanine, vitamin E and F, caffeine, panthenol, glycols, glycolic acid, PCA, PEGs, erythritol, lactates, hyaluronates, allantoin and other ureas, betaines, sorbitol, glutamates, xylitols, menthol, menthyl lactate, iso cyclomone, benzyl alcohol, natural extracts / oils including

[0183] 5 peppermint, spearmint, argan, jojoba and aloe.

[0184] The hair care composition may comprise from 0.01 to 10%, preferably from 0.1 to 5%, more preferably from 0.5 to 2% of the scalp health agent by weight of the composition.

[0185] The hair care composition may additionally comprise a conditioning agent to provide conditioning benefit. Preferably, the hair care composition comprises discrete dispersed droplets of a water-insoluble conditioning agent, which has a mean droplet diameter (D3,2) of less than 15 microns, preferably less than 10 microns, more preferably less than 5 microns, most preferably less than 3 microns. The mean droplet diameter (D3,2) of a water-insoluble 15 conditioning agent may be measured by means of a laser light scattering technique, for example using a 2600D Particle Sizer from Malvern Instruments.

[0186] The water-insoluble conditioning agent may include non-silicone conditioning agent comprising non-silicone oily or fatty materials such as hydrocarbon oils, fatty esters and mixtures thereof.

[0187] 20 Preferably, the water-insoluble conditioning agent is emulsified silicone oil.

[0188] Suitable silicones include polydiorganosiloxanes, in particular polydimethylsiloxanes which have the CTFA designation dimethicone. Also suitable for use in compositions of this invention (particularly shampoos and conditioners) are polydimethyl siloxanes having hydroxyl end 25 groups, which have the CTFA designation dimethiconol. Also suitable for use in compositions of this invention are silicone gums having a slight degree of cross-linking, as are described for example in WO 96 / 31188. Preferably, the silicone oil comprises dimethicone, dimethiconol or a mixture thereof.

[0189] Suitable emulsified silicones for use in the hair care compositions of this invention are available as pre-formed silicone emulsions from suppliers of silicones such as Dow Corning and GE silicones. The use of such pre-formed silicone emulsion is preferred for ease of processing and control of silicone particle size. Such pre-formed silicone emulsions will typically additionally comprise a suitable emulsifier and may be prepared by a chemical emulsification process such 35 as emulsion polymerisation, or by mechanical emulsification using a high shear mixer.P0000889W01 CPL

[0190] 16

[0191] Examples of suitable pre-formed silicone emulsions include DC1785, DC1788, DC7128, all available from Dow Corning. These are emulsions of dimethiconol / dimethicone.

[0192] Another class of silicones which may be used are functionalized silicones such as amino 5 functional silicones, meaning a silicone containing at least one primary, secondary or tertiary amine group, or a quaternary ammonium group. Examples of suitable amino functional silicones include polysiloxanes having the CTFA designation “amodimethicone.”

[0193] The water-insoluble conditioning agent is generally present in hair care composition of this invention in an amount from 0.05 to 15%, preferably from 0.1 to 10%, more preferably from 0.5 to 8%, most preferably from 1 to 5%, based on total weight of the hair care composition.

[0194] Preferably the composition of the invention further comprises a suspending agent. Suitable suspending agents are selected from polyacrylic acids, cross-linked polymers of acrylic acid, 15 copolymers of acrylic acid with a hydrophobic monomer, copolymers of carboxylic acidcontaining monomers and acrylic esters, cross-linked copolymers of acrylic acid and acrylate esters, heteropolysaccharide gums and crystalline long chain acyl derivatives. The long chain acyl derivative is desirably selected from ethylene glycol stearate, alkanolamides of fatty acids having from 16 to 22 carbon atoms and mixtures thereof. Ethylene glycol distearate and 20 polyethylene glycol 3 distearate are preferred long chain acyl derivatives, since these impart pearlescence to the composition. Polyacrylic acid is available commercially as Carbopol 420, Carbopol 488 or Carbopol 493. Polymers of acrylic acid cross-linked with a polyfunctional agent may also be used; they are available commercially as Carbopol 910, Carbopol 934, Carbopol 941 and Carbopol 980. An example of a suitable copolymer of a carboxylic acid containing monomer and acrylic acid esters is Carbopol 1342. All Carbopol (trademark) materials are available from Goodrich.

[0195] Suitable cross-linked polymers of acrylic acid and acrylate esters are Pemulen TR1 or Pemulen TR2. A suitable heteropolysaccharide gum is xanthan gum, for example that available as 30 Kelzan mu.

[0196] Mixtures of any of the above suspending agents may be used. Preferred is a mixture of crosslinked polymer of acrylic acid and crystalline long chain acyl derivative.P0000889W01 CPL

[0197] 17

[0198] The suspending agent is generally present in hair care composition of this invention in an amount of from 0.1 to 10%, more preferably from 0.2 to 6%, and most preferably from 0.3 to 4%, based on total weight of the hair care composition and including all ranges subsumed therein.

[0199] 5

[0200] Preservatives may also be incorporated into the hair care composition of this invention to protect against the growth of potentially harmful microorganisms. Suitable traditional preservatives include alkyl esters of parahydroxybenzoic acid, hydantoin derivatives, propionate salts, and a variety of quaternary ammonium compounds. Illustrative yet non-limiting examples of the types of preservatives that may be used in this invention include, for examples, phenoxyethanol, sodium salicylate, methyl paraben, butyl paraben, propyl paraben, diazolidinyl urea, sodium dehydroacetate, benzyl alcohol, sodium benzoate, iodopropynyl butylcarbamate, caprylyl glycol, disodium EDTA or mixtures thereof. In an especially preferred embodiment, the preservative is sodium benzoate, phenoxyethanol, sodium salicylate ora mixture thereof.

[0201] 15 Preservatives are preferably employed in amounts ranging from 0.01 to 2% by weight of the hair care composition.

[0202] It is further preferred that the hair care composition of the invention comprises a cosmetic ingredient. Preferably the cosmetic ingredient is selected from the group consisting of a silicone, 20 an antibacterial agent other than antidandruff agents, a foam booster, a perfume, encapsulates (for example encapsulated fragrance) a dye, a colouring agent, a pigment, a preservative, a thickener, a protein, a phosphate ester, a buffering agent, a pH adjusting agent, a pearlescer (for example; mica, titanium dioxide, titanium dioxide coated mica, ethylene glycol distearate (INCI glycol distearate)) and / or opacifier, a viscosity modifier, an emollient, a sunscreen, an emulsifier, a sensate active (for example menthol and menthol derivatives), vitamins, mineral oils, essential oils, lipids, natural actives, glycerin, natural hair nutrients such as botanical extracts, fruit extracts, sugar derivatives and amino acids, microcrystalline cellulose and mixtures thereof.

[0203] 30 Preferably, the composition of the present invention includes from 0.01 to 20 wt% of the at least one cosmetic ingredient, more preferably from 0.05 to 10 wt%, still more preferably from 0.075 to 7.5 wt% and most preferably, from 0.1 to 5 wt% of the at least one cosmetic ingredient, by weight of the total composition.P0000889W01 CPL

[0204] 18

[0205] Mode of Use

[0206] The compositions of the invention are primarily intended for topical application to scalp and / or at least a portion of the hair or skin of an individual, in rinse-off compositions.

[0207] 5

[0208] When the composition is a shampoo, it is topically applied to the hair and then massaged into the hair and scalp. Then it is rinsed with water prior to drying the hair.

[0209] The invention will be further illustrated by the following, non-limiting Examples, in which all 10 percentages quoted are by weight based on total weight unless otherwise stated.

[0210] The examples are intended to illustrate the invention and are not intended to limit the invention to those examples perse.

[0211] Examples

[0212] Example 1

[0213] This example demonstrated the surfactant system within the scope of the present invention can improve stability. The compositions according to the formulations detailed in Table 1 are 20 prepared. All ingredients are expressed by weight percent of the total formulation, and as level of active ingredient.

[0214] TABLE 1

[0215] Ingredient % Samples

[0216] A 1

[0217] Water To 100 To 100 Lauryl amidopropyl betaine 10.00 10.00 Sodium lauroyl isethionate 3.00 - Sodium lauroyl methyl - 3.00 isethionate

[0218] Sodium methyl lauroyl 1.00 1.00 ta urate

[0219] Polyquaternium-10 0.20 0.20

[0220]

[0221] P0000889W01 CPL

[0222] Guar 0.15 0.15 hydroxypropyltrimonium

[0223] chloride

[0224] Piroctone olamine 0.50 0.50 Preservative 0.80 0.80 pH adjuster 0.30 0.30 Fragrance 0.75 0.75

[0225]

[0226] Stability test

[0227] The samples of the table above were stored in the incubator with temperature at-15°C, 4°C, 25°C, 37°C, 45°C and 50°C for 12 weeks, or with temperature at -15°C and 50°C for 4 weeks. The 5 appearance of the samples was observed.

[0228] Results:

[0229] The observation is summarized in Table 2.

[0230] 10 TABLE 2

[0231] Samples -15°C 4°C 25°C 37°C 45°C 50°C

[0232] A Turbid Turbid Clear Clear Clear Clear 1 Clear Clear Clear Clear Clear Clear

[0233]

[0234] The observations tabulated in Tables 2 clearly indicate that Samples 1 comprising the surfactant system within the scope of the present invention showed improved stability as compared to Samples A is outside the scope of the present invention.

[0235] Example 2

[0236] This example demonstrated the surfactant system within the scope of the present invention can improve the sensory, particularly foaming performance. The compositions according to the formulations detailed in Table 3 are prepared. All ingredients are expressed by weight percent 20 of the total formulation, and as level of active ingredient.P0000889W01 CPL

[0237] 20

[0238] TABLE 3

[0239] Ingredient % Samples

[0240] B 2

[0241] Water To 100 To 100 Lauryl amidopropyl betaine 10.00 10.00 Sodium lauroyl methyl 4 3.00 isethionate

[0242] Sodium methyl lauroyl - 1.00 taurate

[0243] Polyquaternium-10 0.20 0.20 Guar 0.15 0.15 hydroxypropyltrimonium

[0244] chloride

[0245] Piroctone olamine 0.50 0.50 Preservative 0.80 0.80 pH adjuster 0.30 0.30 Fragrance 0.75 0.75

[0246]

[0247] Method

[0248] 5 Foam Tester R-2000 was used to test the speed of foaming and the amount of foam. 1g sample of the table above was diluted 10 times to prepare the dilution. Then 10g dilution was added to the machine (350g deionized water was added), rotated with 800rpm, and the foal amount was tested every 10 seconds.

[0249] 10 Each sample was tested for 3 times.

[0250] Results:

[0251] The average amount of the foam (mL) is summarized in Table 4.

[0252] 15 TABLE 4

[0253] Samples B 2

[0254] After- 10s 122.3mL 132.3 mL

[0255] After ~20s 154 mL 163.7 mL

[0256]

[0257] P0000889W01 CPL

[0258] 21

[0259] The observations tabulated in Tables 4 clearly indicate that Samples 2 comprising the surfactant system within the scope of the present invention showed improved sensory particularly foaming performance (including foaming speed and volume) as compared to Sample B which are outside the scope of the present invention.

[0260] 5

[0261] Example 3

[0262] This example demonstrated the surfactant system within the scope of the present invention can improve the sensory, particularly foaming performance (volume and stability of the foam). The 10 compositions according to the formulations detailed in Table 5 are prepared. All ingredients are expressed by weight percent of the total formulation, and as level of active ingredient.

[0263] TABLE 5

[0264] Ingredient % Samples

[0265] C 3

[0266] Water To 100 To 100 Lauryl amidopropyl 8.4 9.8 betaine(LAPB)

[0267] Sodium lauroyl methyl 4.2 3.15 isethionate

[0268] Sodium methyl lauroyl 1.4 1.05 taurate

[0269] Polyquaternium-10 0.20 0.20 Guar 0.15 0.15 hydroxypropyltrimonium

[0270] chloride

[0271] Piroctone olamine 0.50 0.50 Preservative 0.80 0.80 pH adjuster 0.30 0.30 Fragrance 0.75 0.75 wt% of LAPB (based on total 60% 70% surfactant)

[0272]

[0273] P0000889W01 CPL

[0274] 22

[0275] Method

[0276] Foam Tester R-2000 was used to test the amount of foam. 1g sample of the table above was diluted 10 times to prepare the dilution. Then 10g dilution was added to the machine (350g deionized water was added), rotated with 800rpm, and the foal amount was tested after 40 5 seconds and 70seconds.

[0277] Each sample was tested for 3 times.

[0278] Results:

[0279] The average amount of the foam (mL) is summarized in Table 6.

[0280] TABLE 6

[0281] Samples C 3

[0282] After ~40s 167mL 168 mL

[0283] After -70s 166mL 173 mL

[0284]

[0285] 15 The observations tabulated in Tables 6 clearly indicate that Samples 3 comprising the surfactant system within the scope of the present invention showed improved sensory particularly foaming performance (including volume and stability of the foam) as compared to Sample C which are outside the scope of the present invention.

[0286] Example 4

[0287] This example demonstrated the surfactant system within the scope of the present invention have good sensory, particularly foaming performance (volume and stability of the foam). The compositions according to the formulations detailed in Table 7 are prepared. All ingredients are expressed by weight percent of the total formulation, and as level of active ingredient.

[0288] 25

[0289] TABLE 7

[0290] Ingredient Samples

[0291] 4 5 6 7 8 Water To 100 To 100 To 100 To 100 To 100 Lauryl amidopropyl 10.00 10.00 10.00 10.00 10.00 betaine

[0292]

[0293] P0000889W01 CPL

[0294] 23

[0295] Sodium lauroyl methyl 3.00 3.00 3.00 3.00 3.00 isethionate

[0296] Sodium C14-16 Olefin 1.00 - - - - Sulfonate

[0297] Decyl glucoside - 1.00 - - - Sodium lauroyl - - 1.00 - - glutamate

[0298] Sodium Lauroyl - - - 1.00 - Sarcosinate

[0299] Sodium methyl lauroyl - - - - 1.00 taurate

[0300] Polyquaternium-10 0.20 0.20 0.20 0.20 0.20 Guar 0.15 0.15 0.15 0.15 0.15 hydroxypropyltrimonium

[0301] chloride

[0302] Piroctone olamine 0.50 0.50 0.50 0.50 0.50 Preservative 0.80 0.80 0.80 0.80 0.80 pH adjuster 0.30 0.30 0.30 0.30 0.30 Fragrance 0.75 0.75 0.75 0.75 0.75

[0303]

[0304] Method

[0305] Foam Tester R-2000 was used to test the amount of foam. 1g sample of the table above was diluted 10 times to prepare the dilution. Then 10g dilution was added to the machine (350g 5 deionized water was added), rotated with 800rpm, and the foal amount was tested after 40 and 50 seconds.

[0306] Each sample was tested for 3 times.

[0307] 10 Results:

[0308] The average amount of the foam (mL) is summarized in Table 8.P0000889W01 CPL

[0309] 24

[0310] TABLE 8

[0311] Samples 4 5 6 7 8 After ~40s 172mL 174.5mL 174mL 169mL 173mL After ~50s 173mL 178 mL 176mL 171mL 174mL

[0312]

[0313] The observations tabulated in Tables 8 clearly indicate that Samples 4-8 comprising the 5 surfactant system within the scope of the present invention showed improved sensory particularly foaming performance (including volume and stability of the foam).

Claims

P0000889W01 CPL25CLAIMS1. An aqueous cosmetic composition comprising:i) at least one of amphoteric or zwitterionic surfactant;ii) at least one of O-acyl methyl isethionate anionic surfactants; andiii) an additional surfactant selected from N-acyl sarcosinates, N-acyl glutmates, N- acyl glycinates, N-acyl taurates, sulfonates, N-acyl glucosides, and mixtures thereof;wherein the composition comprises at least 70% of said amphoteric or zwitterionic surfactant by weight of the total amount of the surfactant; wherein said composition comprises less than 1.5% of inorganic salt by weight of the composition; wherein the composition is substantially free from sulphate-based surfactants.

2. A composition as claimed in claim 1 wherein the weight ratio of said amphoteric or zwitterionic surfactant to the amount of said isethionate anionic surfactant is from 1:1 to 10:1.

3. A composition as claimed in claim 1 or 2 wherein said amphoteric or zwitterionic surfactant comprises betaines, sultaines, hydroxysultanes, amphohydroxypropyl sulfonates, alkyl amphoactates, alkyl amphodiacetates, and combination thereof4. A composition as claimed in any of claims 1 to 3 wherein said amphoteric or zwitterionic surfactant comprises one of betaines selected from coco dimethyl carboxymethyl betaine, cocoamidopropyl betaine, cocobetaine, lauryl amidopropyl betaine, oleyl betaine, lauryl dimethyl carboxymethyl betaine, lauryl dimethyl alphacarboxyethyl betaine, cetyl dimethyl carboxymethyl betaine, lauryl bis-(2-hydroxyethyl) carboxymethyl betaine, steryl bis-(2- hydroxypropyl) carboxymethyl betaine, oleyl dimethyl gamma-carboxypropyl betaine, lauryl bis-(2-hydroxypropyl)alpha-carboxyethyl betaine and mixtures thereof, preferably comprises lauryl amidopropyl betaine.

5. A composition as claimed in any of claims 1 to 4 wherein said isethionate anionic surfactant comprises sodium lauroyl methyl isethionate, sodium hydrogenated cocoylP0000889W01 CPL26methyl isethionate, sodium cocoyl methyl isethionate, sodium oleyl methyl isethionate, sodium stearoyl methyl isethionate and mixtures thereof, preferably comprises sodium lauroyl methyl isethionate.

6. A composition as claimed in any of claims 1 to 5 wherein said additional surfactant is a N- acyl amino acid surfactant.

7. A composition as claimed in any of claims 1 to 6 wherein said composition comprises from 3 to 20 % of said amphoteric or zwitterionic surfactant by weight of the composition.

8. A composition as claimed in any of claims 1 to 7 wherein said composition comprises from 0.3 to 8.5% of said isethionate anionic surfactant by weight of the composition.

9. A composition as claimed in any of claims 1 to 8 wherein said composition comprises from 0.1 to 10% of said additional surfactant of by weight of the composition.

10. A composition as claimed in any of claims 1 to 9 wherein the composition comprises a cationic polymer.

11. A composition as claimed in claim 10 wherein said cationic polymer has a molecular weight of 50,000 to 5,000,000 g / mol and a charge density of from 0.1 to 7.0 meq / g as measured using the method of measurement of molecular weight and charge density as disclosed herein.

12. A composition as claimed in any of claims 1 to 11 wherein the composition comprises a scalp health agent.

13. A composition as claimed in any of claims 1 to 12 wherein the composition is free from cleansing surfactants not defined in claim 1.

14. A composition as claimed in any of claims 1 to 13 wherein the composition is a shampoo composition.P0000889W01 CPL2715. A composition as claimed in any of claims 1 to 14 wherein the composition has a percent transparency (% T) of at least 50% transmittance at 600 nm as measured using the method of measurement of %Transmittance as disclosed herein.

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