Composition for conditioning hair

Abstract

The present invention relates to a composition for conditioning hair comprising: a) at least one tertiary amido amine surfactant; b) at least one beta hydroxy acid; and c) optionally a C16-C22 fatty alcohol wherein the molar ratio of tertiary amido amine surfactant to beta hydroxy acid is from 1: 1 to 1: 0.01, the pH of the composition is at least 6.5, and the total amount of C16-C22 fatty alcohol, if present, is less than 1% by weight. The invention also relates to a method of caring for the hair, comprising at least a step of applying a composition according to the invention to the hair.

Description

Technical Field

[0001] The present invention belongs to the field of cosmetology. In particular, the present invention relates to a composition for conditioning hair. The present invention also relates to a cosmetic method for conditioning hair. Background Art

[0002] The appearance and / or condition of keratin fibers is often affected by extrinsic and intrinsic factors such as aging.

[0003] Keratin fibers, especially hair, are often exposed to harsh external conditions, such as sunlight, chemical damage, for example from detergents, bleaching, relaxing, dyeing and permanent curling, heat, for example from hair dryers or curling irons, and mechanical stress or abrasion, for example from brushing or combing activities. In addition, any type of hair can decrease in quality and / or quantity over time and / or due to factors such as natural oils, sweat, skin cells shed from the scalp, pollution, dirt and extreme humidity conditions.

[0004] The above factors can lead to thinning of hair and / or impair the visual look and feel of hair, and result in dull hair and reduced volume.

[0005] For example, hair can dry out and lose its luster or color, or become frizzy and unmanageable under low and high humidity conditions. Under low humidity conditions, hair can dry out, and dry hair tends to be less shiny and more brittle. Conversely, under high humidity conditions, hair tends to absorb water, causing the hair to lose its shape and become unmanageable and unattractive.

[0006] In addition, due to physical stress on the hair, such as brushing and applying heat, the hair can lose its desirable properties.Thus, these factors usually cause damage to the keratin fibers by affecting the protective materials on the surface of the hair (cuticle) or by changing the interior of the hair fiber (cortex).

[0007] Therefore, it is highly desirable to have products that provide hair conditioning benefits.

[0008] Hair washing conditioners are usually based on a combination of a cationic surfactant, usually a quaternary ammonium compound, and a fatty alcohol. This combination creates a gel network structure that provides smoothness to the hair, providing a composition with a thick, creamy rheology and that will build up on the hair.

[0009] Therefore, there is a need to formulate cosmetic compositions for conditioning hair that can provide smoothness to the hair without creating build-up on the hair. Summary of the invention

[0010] It was therefore an object of the present invention to develop a composition for conditioning hair which provides hair softness without causing build-up on the hair.

[0011] Thus, according to a first aspect, the present invention provides a composition for conditioning hair comprising:

[0012] a) at least one tertiary amidoamine surfactant;

[0013] b) at least one beta hydroxy acid; and

[0014] c) optionally C16-C22 fatty alcohol,

[0015] in

[0016] The molar ratio of the tertiary amidoamine surfactant to the beta hydroxy acid is 1:1 to 1:0.01,

[0017] The pH of the composition is at least 6.5,

[0018] If present, the total amount of C16-C22 fatty alcohols is less than 1 wt%.

[0019] The compositions according to the present invention provide smoothness and softness to the hair without causing build-up on the hair.

[0020] Furthermore, the composition according to the invention is nevertheless easy to apply owing to its compact texture.

[0021] Furthermore, in some embodiments, compositions according to the present invention exhibit a desirable pearlescent appearance.

[0022] According to a second aspect, the present invention provides a method of conditioning hair comprising applying to the hair a composition as described above.

[0023] Other characteristics and advantages of the invention will appear more clearly on reading the following description and examples.

[0024] Detailed description of the invention

[0025] As used herein, unless otherwise indicated, the limits of a numerical range are included in that range, particularly in the expressions "between ... and ..." and "from ... to ...".

[0026] As used herein, the term "comprising" should be interpreted as including all the specifically mentioned features as well as optional, additional, unspecified features.

[0027] As used herein, use of the term "comprising" also discloses embodiments in which features other than those specifically mentioned are absent (ie, "consisting of") .

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the invention belongs. When the definition of a term in this specification conflicts with the meaning commonly understood by those skilled in the art to which the invention belongs, the definition described herein shall apply.

[0029] Unless otherwise indicated, all numerical values ​​expressing quantities of ingredients and the like used in the specification and claims are to be understood as modified by the term “about.” Accordingly, unless indicated to the contrary, the numerical values ​​and parameters set forth herein are approximations that can vary depending upon the desired properties sought to be obtained.

[0030] As used herein, the expression "at least one" used in this specification is equivalent to the expression "one or more" and can replace it.

[0031] According to a first aspect of the present invention, a composition for conditioning hair comprises:

[0032] a) at least one tertiary amidoamine surfactant;

[0033] b) at least one beta hydroxy acid; and

[0034] c) Optional C16-C22 fatty alcohol.

[0035] Tertiary amidoamine surfactant

[0036] According to a first aspect, the composition of the present invention comprises at least one tertiary amidoamine surfactant.

[0037] Amidoamines are a class of compounds formed from fatty acids and diamines.

[0038] Preferably, the tertiary amidoamine surfactant is selected from 10 -C 30 Tertiary amidoamines of alkyl chains.

[0039] More preferably, the tertiary amidoamine surfactant is selected from (C 10 -C 30 ) alkylamido (C 1 -C 8 )alkyl(di)(C 1 -C 6 )alkylamine.

[0040] (C 10 -C 30 ) alkylamido (C 1 -C 8 )alkyl(di)(C 1 -C 6)alkylamine, it must be understood that the alkyl group can be straight-chain or branched, and acylamino, it must be understood that the group -C(O)-N(R)- or -N(R)-C(O)-, wherein R represents a hydrogen atom or a straight-chain or branched (C 1 -C 6 )alkyl.

[0041] More preferably, the tertiary amidoamine surfactant is selected from those of the formula:

[0042] R 1 -C(O)-N(H)-R 2 -NR 3 R 4 (A)

[0043] in:

[0044] R 1 For C 10 -C 30 Alkyl or alkenyl carbon chains,

[0045] R 2 For straight chain C 1 -C 6 Alkylene, and

[0046] R 3 and R 4 Same or different, is with C 1 -C 4 A straight-chain alkyl group.

[0047] Preferably, in formula (A),

[0048] R 1 Contains C 12 -C 24 A straight-chain alkyl group of carbon chain,

[0049] R 2 For straight chain C 1 -C 4 Alkylene, and

[0050] R 3 and R 4 The same means a methyl group or an ethyl group.

[0051] More preferably, in formula (A), R 2 For -(CH 2 ) 3 -, and R 3 and R 4 -CH 3 Group.

[0052] Non-limiting examples of tertiary amidoamine surfactants include oleamidopropyl dimethylamine, stearamidopropyl dimethylamine, isostearamidopropyl dimethylamine, stearamidoethyl dimethylamine, lauramidopropyl dimethylamine, myristamidopropyl dimethylamine, behenamidopropyl dimethylamine, dimeroleamidopropyl dimethylamine, palmitoylamidopropyl dimethylamine, ricinoleamindopropyl dimethylamine, soyaamidopropyl dimethylamine, wheatgermamidopropyl dimethylamine, sunflower seedamidopropyl dimethylamine, almondamidopropyl dimethylamine, avocadoamidopropyl dimethylamine, carnaubaamidopropyl dimethylamine, cocoamidopropyl dimethylamine, minkamidopropyl dimethylamine, oatamidopropyl dimethylamine, sesamidopropyldimethylamine, tallowamidopropyl dimethylamine. dimethylamine), brassica amidopropyl dimethylamine, olive amidopropyl dimethylamine, palmitamidopropyl dimethylamine, stearamidoethyl diethylamine, and combinations thereof.

[0053] Preferably, the tertiary amidoamine surfactant is selected from brassica amidopropyl dimethylamine, stearyl amidopropyl dimethylamine, behenamidopropyl dimethylamine and combinations thereof.

[0054] In some embodiments, the compositions of the present invention include brassamidopropyldimethylamine.

[0055] Brassinoylaminopropyldimethylamine can be represented by the following formula (A1):

[0056] RC(O)-N(H)-(CH 2 ) 3 -N(CH 3 ) 2 (A1)

[0057] RC(O) is a fatty acid derived from campestris seed oil (rapeseed oil), mainly behenyl (C 22 ).

[0058] As the brassinoylaminopropyl dimethylamine used in the composition of the present invention, there can be mentioned PROCONDITION TM twenty two.

[0059] In some embodiments, the compositions of the present invention comprise stearamidopropyl dimethylamine.

[0060] Stearylaminopropyl dimethylamine can be represented by the following formula (A2):

[0061] CH 3 -(CH 2 ) 16 -C(O)-N(H)-(CH 2 ) 3 -N(CH 3 ) 2 (A2)

[0062] As stearamidopropyl dimethylamine used in the composition of the present invention, particular mention may be made of stearamidopropyl dimethylamine from Evonik AMID S 18 and Clarient SPA.

[0063] Advantageously, the tertiary amidoamine surfactant is present in the composition of the invention in an amount ranging from 0.1% to 10% by weight, preferably from 2% to 8% by weight, more preferably from 2.4% to 5% by weight, relative to the total weight of the composition.

[0064] Beta-Hydroxy Acids

[0065] According to a first aspect, the composition of the invention comprises at least one beta-hydroxy acid.

[0066] According to the invention, the term "β-hydroxy acid" is understood to mean a carboxylic acid having a hydroxyl function and a carboxyl function separated by two carbon atoms.

[0067] Preferably, the β-hydroxy acid is selected from salicylic acid and its derivatives of the following formula:

[0068]

[0069] wherein R is a linear, branched or cyclic saturated aliphatic group, or an aliphatic unsaturated group containing one or more double bonds, which may or may not be conjugated, and which contains 2 to 22 carbon atoms, preferably 3 to 11 carbon atoms, and which may be substituted by, for example, at least one substituent selected from: (a) a halogen atom; (b) a trifluoromethyl group; (c) a hydroxyl group in free form or esterified with an acid having 1 to 6 carbon atoms; or (d) a free carboxyl functional group or a carboxyl functional group esterified with a lower alcohol having 1 to 6 carbon atoms;

[0070] R' is a hydroxyl group or an ester functional group of the formula:

[0071]

[0072] Among them, R 1 is a linear or branched saturated or unsaturated aliphatic group having 1 to 18 carbon atoms.

[0073] Preferred salicylic acid derivatives include 5-n-octanoylsalicylic acid (octanoylsalicylic acid), 5-n-decanoylsalicylic acid, 5-n-dodecanoylsalicylic acid, 5-n-heptyloxysalicylic acid and 4-n-heptyloxysalicylic acid.

[0074] More preferably, the β-hydroxy acid is selected from salicylic acid, 5-n-octanoyl salicylic acid, 5-n-decanoyl salicylic acid, 5-n-dodecanoyl salicylic acid, 5-n-heptyloxy salicylic acid, 4-n-heptyloxy salicylic acid, and combinations thereof.

[0075] Most preferably, the beta-hydroxy acid is salicylic acid.

[0076] Salicylic acid or 2-hydroxybenzoic acid is provided to a chemical peel composition to provide enhanced penetration of the composition into the skin. Salicylic acid penetrates deeper into the skin than alpha-hydroxy acids (eg, lactic acid).

[0077] Advantageously, the beta-hydroxy acid is present in the composition according to the invention in an amount ranging from 0.05% to 1% by weight, preferably from 0.1% to 0.5% by weight and more preferably from 0.15% to 0.3% by weight relative to the total weight of the composition.

[0078] The inventors have found that in the absence of fatty alcohol and at a pH of at least 6.5 (which can be achieved by the molar ratio of tertiary amidoamine surfactant to beta-hydroxy acid described below), the composition of the present invention forms a tighter and more dense lamellar structure compared to conventional conditioners having a lamellar structure, thereby delivering improved smoothness of dry and wet hair. At the same time, this tighter and denser lamellar structure can provide a unique pearlescent appearance without the need for any additional pearlescent agent, and does not produce the fatty alcohol "piling up" phenomenon commonly associated with conventional conditioners.

[0079] Advantageously, the molar ratio of the tertiary amidoamine surfactant to the beta-hydroxy acid is from 1:1 to 1:0.01, preferably from 1:0.6 to 1:0.05, more preferably from 1:0.5 to 1:0.09.

[0080] In some embodiments, the composition according to the present invention comprises stearamidopropyl dimethylamine and salicylic acid, and the molar ratio of stearamidopropyl dimethylamine to salicylic acid is 1:1 to 1:0.01, preferably 1:0.6 to 1:0.05, and more preferably 1:0.5 to 1:0.2.

[0081] In some embodiments, the composition according to the present invention comprises brassamidopropyldimethylamine and salicylic acid, and the molar ratio of brassamidopropyldimethylamine to salicylic acid is 1:1 to 1:0.03, preferably 1:0.4 to 1:0.06, and more preferably 1:0.2 to 1:0.09.

[0082] Fatty alcohol

[0083] According to a first aspect, the composition of the present invention optionally comprises a C16-C22 fatty alcohol.

[0084] If present, the amount of C16-C22 fatty alcohol in the composition according to the invention is less than 1% by weight.

[0085] Preferably, the composition according to the invention is free of C16-C22 fatty alcohols.

[0086] More preferably, the composition according to the invention does not contain fatty alcohols containing more than 8 carbon atoms, preferably more than 10 carbon atoms.

[0087] pH

[0088] Preferably, the pH of the composition according to the invention is at least 7.3.

[0089] More preferably, the pH of the composition according to the invention is between 7.3 and 8.

[0090] Additional cosmetic active ingredients

[0091] Depending on the end purpose, the compositions according to the invention may comprise one or more additional cosmetically active ingredients.

[0092] As cosmetic active ingredients that can be used in the composition of the present invention, examples that may be mentioned include silicones, humectants, cationic conditioning agents, and the like.

[0093] The cationic conditioning agent is not particularly limited. For example, it can be any commonly used in the art, such as a cationic surfactant, such as distearyl dimethyl ammonium chloride, cetyl trimethyl ammonium chloride, behenyl trimethyl ammonium chloride, behentrimontum chloride, cetyl trimethyl ammonium chloride, oleocetyl dimethyl hydroxyethyl ammonium chloride, stearamidopropyl dimethyl (myristyl acetate) ammonium chloride, di (C 1 -C 2 Alkyl)(C 12 -C 22 Alkyl)hydroxyl (C 1 -C 2alkyl) ammonium salts, such as dialkyldimethylammonium salts or alkyltrimethylammonium salts, wherein the alkyl group preferably contains 12 to 24 carbon atoms, propane tallow diammonium dichloride, behentrimethylammonium methylsulfate, Quaternium-87, and combinations thereof.

[0094] Cationic polymers such as polymeric quaternary ammonium salts, for example, Polyquaternium-7 copolymer of acrylamide and diallyldimethylammonium chloride, Polyquaternium-10 quaternized hydroxyethylcellulose, Polyquaternium-11 copolymer of vinyl pyrrolidone and quaternized dimethylaminoethyl methacrylate, Polyquaternium-22 copolymer of acrylic acid and diallyldimethylammonium chloride, and combinations thereof, can be used as cationic conditioning agents (containers) in the compositions according to the present invention.

[0095] In some embodiments, the compositions according to the present invention comprise a cationic conditioning agent selected from the group consisting of distearyl dimethyl ammonium chloride, cetyl trimethyl ammonium chloride, behenyl trimethyl ammonium chloride, behenyl trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, oleyl cetyl dimethyl hydroxyethyl ammonium chloride, stearamidopropyl dimethyl (myristyl acetate) ammonium chloride, di(C 1 -C 2 Alkyl)(C 12 -C 22 Alkyl)hydroxyl (C 1 -C 2 alkyl) ammonium salts, such as dialkyldimethylammonium salts or alkyltrimethylammonium salts, wherein the alkyl group preferably contains 12 to 24 carbon atoms, propane tallow diammonium dichloride, behentrimonium methylsulfate, quaternium-87, polyquaternium-7 copolymer of acrylamide and diallyldimethylammonium chloride, polyquaternium-10 quaternized hydroxyethylcellulose, polyquaternium-11 copolymer of vinyl pyrrolidone and quaternized dimethylaminoethyl methacrylate, polyquaternium-22 copolymer of acrylic acid and diallyldimethylammonium chloride, and combinations thereof.

[0096] The inventors have discovered that in the presence of a cationic surfactant such as Quaternium-87, the composition can deliver a softer feel to both wet and dry hair.

[0097] A person skilled in the art can easily adjust the amount of additional cosmetic active ingredients based on the final use of the composition according to the invention.

[0098] Additional auxiliaries or additives

[0099] The compositions according to the invention may contain conventional cosmetic adjuvants or additives, such as preservatives and bactericides, hydrophilic thickeners and perfumes.

[0100] A person skilled in the art will be able to select the amount of additional auxiliaries or additives so as not to adversely affect the end use of the composition according to the invention.

[0101] Water Phase

[0102] The composition according to the invention comprises an aqueous phase.

[0103] Preferably, the aqueous phase is the continuous phase.

[0104] The aqueous phase of the present invention comprises water.

[0105] The aqueous phase may also contain water-miscible organic solvents (at room temperature of 20-25° C.), for example polyols such as C2-C6 polyols, more particularly glycerol, hexylene glycol; glycol ethers (especially containing 3 to 16 carbon atoms), for example mono-, di- or tripropylene glycol (C2-C6 polyols); 1 -C 4 ) alkyl ether, mono-, di- or tri-ethylene glycol (C 1 -C 4 ) alkyl ethers, and combinations thereof.

[0106] Advantageously, the aqueous phase is present in an amount ranging from 70% to 99% by weight and preferably from 80% to 95% by weight relative to the total weight of the composition.

[0107] According to a preferred embodiment, the present invention provides a composition for conditioning hair, comprising, relative to the total weight of the composition:

[0108] a) 2.4 to 5 wt. % of at least one tertiary amidoamine surfactant selected from (C 10 -C 30 ) alkylamido (C 1 -C 8 )alkyl(di)(C 1 -C 6 ) alkylamines; and

[0109] b) 0.1% to 0.5% by weight of salicylic acid,

[0110] in

[0111] The molar ratio of the tertiary amidoamine surfactant to the p-hydroxy acid is 1:0.5 to 1:0.09,

[0112] The pH of the composition is at least 7.3,

[0113] The composition contains no C16-C22 fatty alcohols.

[0114] Preparation and use

[0115] The composition according to the invention can be prepared by mixing the components contained therein.

[0116] The compositions according to the present invention may be used to provide hair conditioning benefits, such as providing hair softness without buildup on the hair and causing scalp roughness and irritation.

[0117] Application of the composition can be carried out on wet or dry hair.

[0118] According to a second aspect of the present invention there is provided a method of conditioning hair comprising applying to the hair a composition as described above.

[0119] The following examples are given to illustrate the present invention and should not be construed as limiting the scope. Example

[0120] The main raw materials used, their trade names and their suppliers are listed in Table 1.

[0121] Table 1

[0122]

[0123] Inventive Examples 1-7 and Comparative Examples 1-6

[0124] The compositions according to Inventive Examples (IE.) 1-7 and Comparative Examples 1-6 were prepared using the ingredients listed in Tables 2-4 (content expressed in weight %):

[0125] Table 2

[0126]

[0127]

[0128] Table 3

[0129]

[0130] Table 4

[0131]

[0132] The compositions of Inventive Examples 1 to 7 are compositions according to the present invention.

[0133] The compositions of Comparative Examples 1, 2 and 5 had a pH lower than 6.5.

[0134] The compositions of Comparative Examples 3 and 4 contained alpha-hydroxy acids instead of beta-hydroxy acids.

[0135] The composition of Comparative Example 5 contained 3 wt% of cetearyl alcohol.

[0136] Preparation Procedure:

[0137] Taking the composition of Inventive Example 1 as an example, the composition is prepared as follows:

[0138] 1) Pour salicylic acid and water into a main container and heat to 80°C. Mix gently until salicylic acid is completely dissolved to obtain a clear liquid.

[0139] 2) heating stearamidopropyl dimethylamine to 80° C. and melting it into a liquid;

[0140] 3) Pour the melted stearamidopropyl dimethylamine into the main container at 80°C and homogenize for 15 minutes;

[0141] 4) Cool the main container to 30°C with gentle mixing to obtain the composition.

[0142] evaluate

[0143] The appearance and texture of the compositions of Inventive Examples 1-6 and Comparative Examples 1-6 were observed.

[0144] The compositions of Inventive Examples 1 and 2 comprise stearamidopropyl dimethylamine and salicylic acid, and the molar ratio of stearamidopropyl dimethylamine to salicylic acid is the same. The composition of Inventive Example 1 exhibits a lotion texture with a strong pearlescent appearance. The composition of Inventive Example 2 exhibits a cream texture with a strong pearlescent appearance.

[0145] The compositions of Inventive Examples 3 and 4 comprise brassamidopropyl dimethylamine and salicylic acid, and the molar ratio of brassamidopropyl dimethylamine to salicylic acid is the same. The composition of Inventive Example 3 exhibits a lotion texture with a strong pearlescent appearance. The composition of Inventive Example 4 exhibits a cream texture with a strong pearlescent appearance.

[0146] The compositions of Inventive Examples 1-4 demonstrate the effect of the absolute amount of tertiary amidoamine surfactant in the composition on the final texture.

[0147] The composition of Inventive Example 5 comprises brassamidopropyl dimethylamine, salicylic acid and cetearyl alcohol. The composition of Inventive Example 5 exhibits a cream texture having a pearlescent appearance.

[0148] The compositions of Comparative Examples 1 and 2 comprise stearamidopropyl dimethylamine / brassicaamidopropyl dimethylamine and salicylic acid, wherein the molar ratio of the tertiary amidoamine surfactant to salicylic acid is outside the claimed range. The compositions of Comparative Examples 1 and 2 exhibit a transparent liquid texture without a pearlescent appearance.

[0149] The composition of Comparative Example 3 includes stearamidopropyl dimethylamine and citric acid. It exhibits a white, uneven, thin cream texture. The composition of Comparative Example 4 includes brassica amidopropyl dimethylamine and citric acid. It exhibits a phase-separated texture.

[0150] The composition of Comparative Example 5 comprises brassamidopropyldimethylamine, salicylic acid and lactic acid. It exhibits a phase separation texture.

[0151] The composition of Comparative Example 6 comprises brassamidopropyl dimethylamine, salicylic acid and cetearyl alcohol. It shows a white cream without a pearlescent appearance.

[0152] The compositions of Inventive Examples 1 to 5 have denser layered structures than the composition of Comparative Example 6. However, the other Comparative Examples cannot form a layered structure.

[0153] Furthermore, the compositions of Inventive Examples 1-5 exhibited a pearlescent appearance, whereas the compositions of Comparative Examples 1-6 did not exhibit a pearlescent appearance.

[0154] Wet and dry hair sensory

[0155] For the inventive examples and comparative examples, 6 g of Chinese natural hair (length: 27 cm, diameter: 2.5 cm) was dyed twice using a standard method, and dry and wet hair sensory tests were performed.

[0156] Wet Hair Sensation

[0157] First, hair samples were processed as follows.

[0158] 1. Pre-wash the hair sample with 2.4 g of silicone-free shampoo and massage the hair sample for 1 minute;

[0159] 2. Rinse the hair sample with water at a fixed flow rate at 36.5°C for 30 seconds;

[0160] 3. Use two fingers to squeeze out the water once;

[0161] 4. Apply 2.4 g of the sample to be evaluated to the pre-washed hair sample and massage for 1 minute;

[0162] 5. Rinse the hair sample with water at a fixed flow rate at 36.5°C for 30 seconds;

[0163] 6. Use two fingers to squeeze out the water once and hang up the hair sample.

[0164] Then, six panelists were invited to score the two test samples from -2' to 2' (increased by 0.25'). The scores of the baseline sensory attributes were normalized to zero. Based on this scoring standard, scores between ±0.5 and ±0.75 showed slight differences. Scores equal to or greater than ±1 indicated significant differences.

[0165] Dry Hair Sensation

[0166] Repeat the above steps 1-6, and then leave the hair sample to dry at room temperature.

[0167] Then, six panelists were invited to score the two test samples from -2' to 2' (increased by 0.25'). The scores of the baseline sensory attributes were normalized to zero. Based on this scoring standard, scores between ±0.5 and ±0.75 showed slight differences. Scores equal to or greater than ±1 indicated significant differences.

[0168] Table 5 shows the results of the evaluation of the compositions of Inventive Examples 1-5. As can be seen from Table 5, the compositions of Inventive Examples 2, 4 and 5 provide significantly better smoothness and slightly improved softness with significantly less coating on wet and dry hair compared to the baseline composition of Comparative Example 6.

[0169] Table 5

[0170]

[0171] Table 6 shows the results obtained from the softness ratings of the compositions of Inventive Examples 6 and 7.

[0172] Table 6

[0173]

Claims

1. A composition for conditioning hair, comprising: a) at least one tertiary amidoamine surfactant; b) at least one beta hydroxy acid; and c) optionally C16-C22 fatty alcohol, in The molar ratio of the tertiary amidoamine surfactant to the beta hydroxy acid is 1:1 to 1:0.01, The pH of the composition is at least 6.5, and If present, the total amount of C16-C22 fatty alcohols is less than 1 wt%.

2. The composition according to claim 1, wherein the tertiary amidoamine surfactant is selected from (C 10 -C 30 ) alkylamido (C 1 -C 8 )alkyl(di)(C 1 -C 6 )alkylamine.

3. The composition of claim 1, wherein the tertiary amidoamine surfactant is selected from those of the formula: R 1 -C(O)-N(H)-R 2 -NR 3 R 4 (A) in ： R 1 For C 10 -C 30 Alkyl or alkenyl carbon chains, R 2 For straight chain C 1 -C 6 Alkylene, and R 3 and R 4 Same or different, is with C 1 -C 4 A linear alkyl carbon chain, Preferably, in formula (A), R 1 For C 12 -C 24 A linear alkyl carbon chain, R 2 For straight chain C 1 -C 4 Alkylene, and R 3 and R 4 The same means a methyl group or an ethyl group.

4. The composition according to claim 1, wherein the tertiary amidoamine surfactant is selected from oleamidopropyl dimethylamine, stearamidopropyl dimethylamine, isostearamidopropyl dimethylamine, stearamidoethyl dimethylamine, lauroylamidopropyl dimethylamine, myristamidopropyl dimethylamine, behenamidopropyl dimethylamine, dimerized linoleamidopropyl dimethylamine, palmitoylamidopropyl dimethylamine, ricinamidopropyl dimethylamine, soyaamidopropyl dimethylamine, wheat germ Amidopropyl dimethylamine, sunflower seed amidopropyl dimethylamine, almond amidopropyl dimethylamine, avocado amidopropyl dimethylamine, carnauba amidopropyl dimethylamine, cocoamidopropyl dimethylamine, minkamidopropyl dimethylamine, oatamidopropyl dimethylamine, sesame amidopropyl dimethylamine, tallowamidopropyl dimethylamine, brassica amidopropyl dimethylamine, olive amidopropyl dimethylamine, palmitamidopropyl dimethylamine, stearamidoethyl diethylamine, and combinations thereof.

5. The composition according to any one of claims 1 to 4, wherein the tertiary amidoamine surfactant is selected from the group consisting of brassica amidopropyl dimethylamine, stearamidopropyl dimethylamine, behenamidopropyl dimethylamine, and combinations thereof.

6. The composition according to any one of claims 1 to 5, wherein the tertiary amidoamine surfactant is present in an amount of 0.1 wt % to 10 wt %, preferably 2 wt % to 8 wt %, more preferably 2.4 wt % to 5 wt %, relative to the total weight of the composition.

7. A composition according to any one of claims 1 to 6, wherein the beta hydroxy acid is selected from salicylic acid and its derivatives of the following formula: wherein R is a linear, branched or cyclic saturated aliphatic group or an aliphatic unsaturated group containing one or more double bonds, which may be conjugated or unconjugated, which contains 2 to 22, preferably 3 to 11 carbon atoms and can be substituted by, for example, at least one substituent selected from the group consisting of: (a) a halogen atom, (b) a trifluoromethyl group, (c) a hydroxyl group in free form or a hydroxyl group esterified with an acid having 1 to 6 carbon atoms, or (d) a free carboxyl function or a carboxyl function esterified with a lower alcohol having 1 to 6 carbon atoms; R' is a hydroxyl group or an ester functional group having the formula: Where R 1 is a straight or branched saturated or unsaturated aliphatic group having 1 to 18 carbon atoms, Preferably, the beta hydroxy acid is selected from salicylic acid, 5-n-octanoyl salicylic acid, 5-n-decanoyl salicylic acid, 5-n-dodecanoyl salicylic acid, 5-n-heptyl salicylic acid, 4-n-heptyl salicylic acid and combinations thereof, More preferably, the beta hydroxy acid is salicylic acid.

8. The composition according to any one of claims 1 to 7, wherein the beta hydroxy acid is present in an amount of 0.05% to 1% by weight, preferably 0.1% to 0.5% by weight, and more preferably 0.15% to 0.3% by weight relative to the total weight of the composition.

9. The composition according to any one of claims 1-8, wherein the pH of the composition is at least 7.3, preferably, the pH of the composition is 7.3 to 8.

10. The composition according to claim 1, comprising, relative to the total weight of the composition: a) 2.4 to 5 wt. % of at least one tertiary amidoamine surfactant selected from (C 10 -C 30 ) alkylamido (C 1 -C 8 )alkyl(di)(C 1 -C 6 ) alkylamines; and b) 0.1% to 0.5% by weight of salicylic acid, in The molar ratio of the tertiary amidoamine surfactant to the beta hydroxy acid is 1:0.5 to 1:0.09, The pH of the composition is at least 7.3, The composition contains no C16-C22 fatty alcohols.

11. The composition according to any one of claims 1 to 10, further comprising a cosmetic active ingredient selected from silicones, moisturizers; cationic conditioning agents and combinations thereof.

12. The composition according to claim 11, wherein the cationic conditioning agent is selected from the group consisting of distearyl dimethyl ammonium chloride, cetyl trimethyl ammonium chloride, behenyl trimethyl ammonium chloride, behenyl trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, oleyl cetyl dimethyl hydroxyethyl ammonium chloride, stearamidopropyl dimethyl (myristyl acetate) ammonium chloride, di(C 1 -C 2 Alkyl)(C 12 -C 22 Alkyl)hydroxyl (C 1 -C 2 alkyl) ammonium salts, such as dialkyldimethylammonium salts or alkyltrimethylammonium salts, wherein the alkyl group preferably contains 12 to 24 carbon atoms, propane tallow diammonium dichloride, behentrimonium methylsulfate, quaternium-87, polyquaternium-7 copolymer of acrylamide and diallyldimethylammonium chloride, polyquaternium-10 quaternized hydroxyethylcellulose, polyquaternium-11 copolymer of vinyl pyrrolidone and quaternized dimethylaminoethyl methacrylate, polyquaternium-22 copolymer of acrylic acid and diallyldimethylammonium chloride, and combinations thereof.

13. The composition of any one of claims 1 to 12, which is free of C16-C22 fatty alcohols, preferably free of fatty alcohols containing more than 8 carbon atoms, preferably more than 10 carbon atoms.

14. A method of conditioning hair comprising applying to the hair a composition according to any one of claims 1 to 13.

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