Hair oil comprising a low viscosity dimethicone, dimethiconol, and a branched alkane having 8 to 16 carbon atoms

Abstract

The presently claimed invention relates to a hair oil comprising as components optionally (A) at least one dimethicone of the formula (I), (B) at least one dimethicone of the formula (II), (C) at least one dimethiconol, and (D) at least one branched alkane having 8 to 16 carbon atoms, wherein the hair oil is essentially free of dimethicones, having a viscosity higher than 0.01 m2 / s (10 000 cSt). Another aspect of the presently claimed invention relates to a process for the cosmetic treatment of keratin fibers, preferably human hair, comprising the step of applying the hair oil to the keratin fibers, preferably to the human hair. Yet another aspect of the presently claimed invention is the use of the hair oil for conditioning keratin fibers, preferably for conditioning the human hair.

Description

[0001] Hair Oil comprising a low viscosity dimethicone, dimethiconol, and a branched alkane having 8 to 16 carbon atoms

[0002] Description

[0003] The presently claimed invention relates to a hair oil comprising as components optionally (A) at least one dimethicone of the formula (I), (B) at least one dimethicone of the formula (II), (C) at least one dimethiconol, and (D) at least one branched alkane having 8 to 16 carbon atoms, wherein the hair oil is essentially free of dimethicones, having a viscosity higher than 0.01 m2 / s (10 000 cSt). Another aspect of the presently claimed invention relates to a process for the cosmetic treatment of keratin fibers, preferably human hair, comprising the step of applying the hair oil to the keratin fibers, preferably to the human hair. Yet another aspect of the presently claimed invention is the use of the hair oil for conditioning keratin fibers, preferably for conditioning the human hair.

[0004] Background of the invention

[0005] Keratin fibers, like human hair, are generally damaged and weakened by the action of external agents. Such agents may be atmospheric agents like sunlight, bad weather, and mechanical or chemical treatments, like brushing, dyeing, combing, bleaching, permanent-waving and / or straightening the keratin fibers, like human hair. Also repeated washing of the keratin fibers, like human hair, may damaged and weaken the fibers.

[0006] Human hair is thus damaged by the above-mentioned various factors. The human hair may, overtime, become dry, coarse, brittle, or dull, especially in fragile areas, like the ends of the hair and the hair tips. To overcome these drawbacks, it is common practice to resort to haircare products. Such haircare products are intended to condition the hair, given it satisfactory cosmetic properties, like smoothness, shine, softness, lightness, suppleness, a natural feel, and good combing and disentangling properties.

[0007] Haircare compositions are normally applied regularly to the hair. Such haircare compositions may be hair conditioners, masks, gels, hair lotions or care creams which are more or less thick. FR 2 854 798 A1 discloses an aerosol spray comprising 85 % by weight of isobutane, having a boiling point of -11.4 °C, and silicones like cyclopentasiloxane.

[0008] WO 2020 / 201410 A1 discloses a haircare composition comprising one or more branched alkanes having from 8 to 16 carbon atoms, one or more dimethiconols and two different dimethicones, having different viscosities. The first dimethicone has a viscosity below 200 cSt, the second dimethicone has a viscosity in the range of 10 000 to 1 000 000 cSt.

[0009] A drawback of the haircare compositions disclosed in WO 2020 / 201410 A1 is the fact, that this these compositions in some cases result in excessive greasing which results in the human hair having a greasy feel and a charged visual appearance.

[0010] It is an object of the presently claimed invention to provide a hair oil, which does not have the drawbacks mentioned above, and which is capable of conditioning keratin fibers, like human hair in a long-lasting manner, and giving the keratin fibers, like human hair, good cosmetic properties.

[0011] This object has been solved by a hair oil comprising as components#

[0012] (A) optionally at least one dimethicone of the formula (I) (CH3)3SiO[Si(CH3)2O]ni Si(CH3)3wherein n1 is 0, 1 , or 2,

[0013] (B) at least one dimethicone of the formula (II) (CH3)3SiO[Si(CH3)2O]n2Si(CH3)3 wherein n2 is an integer in the range from 3, 4, or 5,

[0014] (C) at least one dimethiconol, and

[0015] (D) at least one branched alkane having 8 to 16 carbon atoms, wherein the hair oil is essentially free of dimethicones, having a viscosity higher than 0.01 m2 / s (10 000 cSt). The hair oil according to the presently claimed invention makes it possible to condition keratin fibers, like human, hair very satisfactorily. It makes it possible to improve dry combability, curl definition, curl uniformity, frizz, elasticity, dry feel, coating evenness and hair shine. It, moreover, makes it possible to nourish and repair damaged hair.

[0016] The presently claimed invention will be described in more detail hereinafter.

[0017] The viscosity of the components, like (A), (B), and (C), which is the kinematic viscosity, is measured at 25°C and at atmospheric pressure (1 atm, 1.013x105Pa) according to ASTM 445 Appendix C.

[0018] In the present case the viscosity of components (A), (B) and (C) in the unit cSt (centi Stoke). 1 cSt equals 1 mm2 / s or 1.0 x 10’6m2 / s.

[0019] The weight-average molecular weight of components (A), (B) and (C), if applicable, may be measured by gel permeation chromatography (GPC) at 25°C, as polystyrene equivalent. As columns p-styragel columns are used. The solvent is tetrahydrofuran (THF) and the flow rate is 1 ml / min. Typically 200 p / l of a 0.5% by weight solution of the component in THF is injected. Detection is typically performed by refractometry and UV-metry. In a preferred embodiment a hair oil is an oil-based cosmetic product intended to improve the condition of hair. Various types of oils may be included in hair oil products.

[0020] Component (A)

[0021] Component (A) is an optional component. In one embodiment the hair oil according to the invention does not contain component (A). In a preferred embodiment the hair oil according to the invention is essentially free of hexamethyldisiloxane, octamethyltrisiloxane, and decamethyltetrasiloxane.

[0022] In the present case “essentially free” means that the hair oil comprises less than 1 % by weight of, preferably less than 0.5 % by weight of, more preferably less than 0.1 % by weight of and particularly preferred less than 0.05 % by weight of dimethicones, selected from the group consisting of hexamethyldisiloxane, octamethyltrisiloxane, and decamethyltetrasiloxane. In an especially preferred embodiment, the hair oil does not contain hexamethyldisiloxane, octamethyltrisiloxane, and decamethyltetrasiloxane.

[0023] In the present case the terms “(A)”, “component (A)”, and “at least one dimethicone of the formula (I)” are used synonymously, and therefore preferably have the same meaning.

[0024] The term “at least one dimethicone of the formula (I)” in the present case means exactly one dimethicone of the formula (I), and mixtures of two or more different dimethicones of the formula (I).

[0025] In formula (I)

[0026] (CH3)3SiO[Si(CH3)2O]m Si(CH3)3n1 is 0, 1 , or 2, preferably n1 1 or 2, and more preferably n1 is 2.

[0027] If n1 is 0 the dimethicone of formula (I) is hexamethyldisiloxane (CAS No. 107- 46-0). If n1 is 1 the dimethicone of formula (I) is octamethyltrisiloxane (CAS No. 107-51-7). If n1 is 2 the dimethicone of formula (I) is decamethyltetrasiloxane (CAS No. 141 -62-8).

[0028] In a particularly preferred embodiment component (A) is at least one dimethicone selected from the group consisting of hexamethyldisiloxane, octamethyltrisiloxane, and decamethyltetrasiloxane.

[0029] In an even more preferred embodiment component (A) is at least one dimethicone selected from the group consisting of octamethyltrisiloxane, and decamethyltetrasiloxane.

[0030] In the most preferred embodiment component (A) is decamethyltetrasiloxane.

[0031] In a preferred embodiment the dimethicones of formula (I) that can be used as component (A) are chosen from volatile dimethicones. In the present case, the term "volatile dimethicones" is intended to mean a dimethicone that is capable of evaporating on contact with the skin or the hair in less than one hour, at ambient temperature and at atmospheric pressure. In another preferred embodiment the dimethicones suitable for component (A) are more preferably chosen from those with a boiling point ranging from 100°C to 200°C, preferably in the range of 100°C to 194°C.

[0032] In the hair oil component (A) is generally present in an amount of 0 to 30 wt.%, preferably in an amount of 4 to 25 wt.%, and more preferred in an amount of 0 to 20 wt.%, based on the total weight of the hair oil.

[0033] In another embodiment in the hair oil component (A) is generally present in an amount of 3 to 30 wt.%, preferably in an amount of 4 to 25 wt.%, and more preferred in an amount of 5 to 20 wt.%, based on the total weight of the hair oil.

[0034] Component (B)

[0035] In the present case the terms “(B)”, “component (B)”, and “at least one dimethicone of the formula (II)” are used synonymously, and therefore preferably have the same meaning.

[0036] The term “at least one dimethicone of the formula (II)” in the present case means exactly one dimethicone of the formula (II), and mixtures of two or more different dimethicones of the formula (II).

[0037] In formula (II)

[0038] (CH3)3SiO[Si(CH3)2O]n2Si(CH3)3 n2 is 3, 4, or 5, preferably n2 is 3 or 4, and more preferably in 2 is 3.

[0039] If n2 is 3 the dimethicone of formula (II) is dodecamethylpentasiloxane (CAS No. 141-63-9). If n2 is 4 the dimethicone of formula (II) is tetradecamethylhexasiloxane (CAS No- 107-52-8). If n2 is 4 the dimethicone of formula (II) is hexadecamethylheptasiloxane (CAS No. 541 -01-5).

[0040] In a preferred embodiment component (B) is at least one dimethicone selected from the group consisting of dodecamethylpentasiloxane, tetradecamethylhexasiloxane, and hexadecamethylheptasiloxane. In a particularly preferred embodiment component (B) is at least one dimethicone selected from the group consisting of dodecamethylpentasiloxane and tetradecamethylhexasiloxane.

[0041] In the most preferred embodiment component (B) is dodecamethylpentasiloxane.

[0042] In a preferred embodiment the dimethicones of formula (II) that can be used as component (B) are also chosen from volatile dimethicones. In the present case, the term "volatile dimethicones" is intended to mean a dimethicone that is capable of evaporating on contact with the skin or the hair in less than one hour, at ambient temperature and at atmospheric pressure, wherein the above made descriptions and preferences in view of component (A) hold true accordingly.

[0043] In the hair oil component (B) is generally present in an amount of 3 to 94.9 wt.%, preferably in an amount of 5 to 89.5 wt.%, and more preferred in an amount of 10 to 84 wt.%, based on the total weight of the hair oil.

[0044] In another embodiment in the hair oil component (B) is generally present in an amount of 3 to 65 wt.%, preferably in an amount of 5 to 60 wt.%, and more preferred in an amount of 10 to 55 wt.%, based on the total weight of the hair oil.

[0045] Component (C)

[0046] In the present case the terms “(C)”, “component (C)”, and “at least one dimethiconol” are used synonymously, and therefore preferably have the same meaning.

[0047] The term “at least one dimethiconol” in the present case means exactly one dimethiconol, and mixtures of two or more different dimethiconols.

[0048] The name dimethiconol is known per se by the skilled person and denotes a polydimethylsiloxane comprising dimethylsilanol end groups.

[0049] In a preferred embodiment the at least one dimethiconol which can be used as component (C) has a weight-average molecular weight (Mw) in the range of 300 000 to 1 300 000 g / mol, more preferred in the range of 400 000 to 1 000 000 g / mol and particularly preferred in the range of 500 000 to 800 000 g / mol.

[0050] In the hair oil component (C) is generally present in an amount of 0.1 to 20 wt.%, preferably in an amount of 0.5 to 15 wt.%, and more preferred in an amount of 1 to 10 wt.%, based on the total weight of the hair oil.

[0051] Component (D)

[0052] In the present case the terms “(D)”, “component (D)”, and “at least one branched alkane having 8 to 16 carbon atoms” are used synonymously, and therefore preferably have the same meaning.

[0053] The term “at least one branched alkane having 8 to 16 carbon atoms” in the present case means exactly one branched alkane having 8 to 16 carbon atoms, and mixtures of two or more different branched alkanes having 8 to 16 carbon atoms.

[0054] Component (D) according to the present invention is at least one branched alkane comprising from 8 to 16 carbon atoms, preferably from 10 to 16 carbon atoms, more preferably from 10 to 14 carbon atoms.

[0055] For the present invention the invention, the term "alkane" is intended to mean a saturated acyclic compound formed solely from carbon and hydrogen atoms.

[0056] The branched alkanes suitable to be used as component (D) preferably correspond to the formula CnH2n+2, wherein n is an integer ranging from 8 to 16, preferably from 10 to 16, more preferably from 10 to 14.

[0057] In a preferred embodiment component (D) is at least one branched alkane selected from the group consisting of isohexadecane (CAS No. 93685-80-4), isododecane (CAS No. 31807-55-3), isodecane (CAS No. 34464-38-5) and isooctane (CAS No. 540-84-1 ).

[0058] Particularly preferably, the branched alkane(s) used as component (D) comprise(s) 12 carbon atoms.

[0059] In an especially preferred embodiment component (D) is isododecane. In a preferred embodiment component (D) is produced from renewable organic raw materials. The conversion of biomass into highly branched paraffins (component (D)) is carried out by fermentation and chemical conversion.

[0060] Especially preferred is bio-based isododecane.

[0061] In the hair oil component (D) is generally present in an amount of 5 to 70 wt.%, preferably in an amount of 10 to 65 wt.%, and more preferred in an amount of 15 to 60 wt.%, based on the total weight of the hair oil.

[0062] The hair oil in one embodiment may comprise as component (E) at least one alcohol. Suitable alcohols may be selected from the group consisting of ethanol, n-propanol and isopropanol. The hair oil comprises component (E), if present, generally in an amount of 0.1 to 15 %by weight, more preferred in an amount of 1 to 10 % by weight, based on the total weight of the hair oil.

[0063] In another embodiment the hair oil may comprise as component (F) at least one natural oil. Suitable natural oils may be selected from the group consisting of olive oil, argania spinosa kernel oil, sweet almond oil, and camellia oleifera oil. The hair oil comprises component (F), if present, generally in an amount of 0.005 to 1.5 % by weight, more preferred in an amount of 0.01 to 1.0 % by weight, based on the total weight of the hair oil.

[0064] The hair oil may comprise further components, like fragrances, vitamins, fatty substances, preservatives, emulsifiers, and the like.

[0065] Hair oil composition

[0066] The hair oil composition comprises components (A), (B), (C), and (D) as described above.

[0067] In a one embodiment the hair oil comprises

[0068] 0 to 30 %by weight of component (A),

[0069] 3 to 94.9 %by weight of component (B),

[0070] 0.1 to 20 %by weight of component (C), and

[0071] 5 to 70 %by weight of component (D), based on the total weight of the hair oil. In a preferred embodiment the hair oil comprises

[0072] 0 to 25 %by weight of component (A),

[0073] 5 to 89.5 %by weight of component (B),

[0074] 0.5 to 15 %by weight of component (C), and

[0075] 10 to 65 %by weight of component (D), based on the total weight of the hair oil.

[0076] In a more preferred embodiment, the hair oil comprises

[0077] 0 to 20 %by weight of component (A),

[0078] 10 to 84 %by weight of component (B),

[0079] 1 to 10 %by weight of component (C), and

[0080] 15 to 60 %by weight of component (D), based on the total weight of the hair oil.

[0081] In a one embodiment the hair oil comprises

[0082] 3 to 30 %by weight of component (A),

[0083] 3 to 65 %by weight of component (B),

[0084] 0.1 to 20 %by weight of component (C), and

[0085] 5 to 70 %by weight of component (D), based on the total weight of the hair oil.

[0086] In a preferred embodiment the hair oil comprises

[0087] 4 to 25 %by weight of component (A),

[0088] 5 to 60 %by weight of component (B),

[0089] 0.5 to 15 %by weight of component (C), and

[0090] 10 to 65 %by weight of component (D), based on the total weight of the hair oil.

[0091] In a more preferred embodiment, the hair oil comprises

[0092] 5 to 20 %by weight of component (A),

[0093] 10 to 55 %by weight of component (B),

[0094] 1 to 10 %by weight of component (C), and

[0095] 15 to 60 %by weight of component (D), based on the total weight of the hair oil.

[0096] In yet another embodiment the hair oil is essentially free of decamethylcyclopentasiloxane, and preferably is essentially free of cyclopentasiloxane(s), and even more preferably is essentially free of cyclomethicones. In the present case “essentially free” means that the hair oil comprises less than 1 % by weight of, preferably less than 0.5 % by weight of, more preferably less than 0.1 % by weight of and particularly preferred less than 0.05 % by weight of decamethylcyclopentasiloxane, preferably of cyclopentasiloxane(s), and more preferably of cyclomethicone(s), based on the total weight of the hair oil.

[0097] In an especially preferred embodiment, the hair oil does not contain decamethylcyclopentasiloxane, preferably does not contain cyclopentasiloxane(s), and even more preferably does not contain cyclomethicone(s).

[0098] In another embodiment the hair oil is essentially free of water. In the present case “essentially free” means that the hair oil comprises less than 2 % by weight of, preferably less than 1 .0 % by weight of, more preferably less than 0.5 % by weight of and particularly preferred less than 0.1 % by weight of water, based on the total weight of the hair oil.

[0099] In another preferred embodiment the hair oil is essentially free of dimethicones, having a viscosity higher than 0.01 m2 / s (10 000 cSt), preferably free of dimethicones having a viscosity higher than 0.001 m2 / s (1 000 cSt), more preferably free of dimethicones having a viscosity higher than 0.0001 m2 / s (100 cSt), most preferably free of dimethicones having a viscosity higher than 50 x 10’6m2 / s (50 cSt), and particularly preferred free of dimethicones having a viscosity higher than 20 x 10’6m2 / s (20 cSt).

[0100] In the present case “essentially free” means that the hair oil comprises less than 1 % by weight of, preferably less than 0.5 % by weight of, more preferably less than 0.1 % by weight of and particularly preferred less than 0.05 % by weight of dimethicones, having a viscosity higher than 10 000 cSt, preferably having a viscosity higher than 1 000 cSt, more preferably having a viscosity higher than 100 cSt, most preferably having a viscosity higher than 50 cSt, and particularly preferred having a viscosity higher than 20 cSt, based on the total weight of the hair oil.

[0101] In an especially preferred embodiment, the hair oil does not contain dimethicones having a viscosity higher than 1 000 cSt, more preferably having a viscosity higher than 100 cSt, most preferably having a viscosity higher than 50 cSt, and particularly preferred having a viscosity higher than 20 cSt.

[0102] In yet another embodiment the hair oil is essentially free of silicones, other than dimethiconol (component (C)) having a viscosity higher than 10 000 cSt, preferably having a viscosity higher than 1 000 cSt, more preferably having a viscosity higher than 100 cSt, most preferably having a viscosity higher than 50 cSt and particularly preferred having a viscosity higher than 20 cSt.

[0103] In the present case “essentially free” means that the hair oil comprises less than 1 % by weight of, preferably less than 0.5 % by weight of, more preferably less than 0.1 % by weight of and particularly preferred less than 0.05 % by weight of silicones, other than dimethiconol (component (C)) having a viscosity higher than 10 000 cSt, preferably having a viscosity higher than 1 000 cSt, more preferably having a viscosity higher than 100 cSt, most preferably having a viscosity higher than 50 cSt and particularly preferred having a viscosity higher than 20 cSt, based on the total weight of the hair oil.

[0104] In an especially preferred embodiment, the hair oil does not contain silicones, other than dimethiconol (component (C)) having a viscosity higher than 10 000 cSt, preferably having a viscosity higher than 1 000 cSt, more preferably having a viscosity higher than 100 cSt, most preferably having a viscosity higher than 50 cSt, and particularly preferred having a viscosity higher than 20 cSt.

[0105] The hair oil according to the invention is advantageously in the form of a clear to translucent, more preferred clear, fluid.

[0106] Preferably, the hair oil according to the invention has a dynamic viscosity at ambient pressure and temperature (25°C; 1 atm) of less than 1000 mPa / s, in particular in the range of from 80 to 500 mPa / s, more preferred in the range of 90 to 400 mPa / s, better still and even more preferred in the range of 100 to 300 mPa / s.

[0107] The dynamic viscosity can be measured using a MCR 502 rotational rheometer from Anton Paar, with a cone / plate diameter 50 mm / 1 ° (sanded steel at 5 pm) geometry; rotational speed 200 revolutions / min; measurements carried out at 25°C, 1 atm. In the following, there is provided a list of embodiments to further illustrate the present disclosure without intending to limit the disclosure to the specific embodiments listed below.

[0108] Embodiments

[0109] 1. Hair oil comprising as components

[0110] (A) optionally at least one dimethicone of the formula (I) (CH3)3SiO[Si(CH3)2O]m Si(CH3)3wherein n1 is 0, 1 , or 2,

[0111] (B) at least one dimethicone of the formula (II) (CH3)3SiO[Si(CH3)2O]n2Si(CH3)3 wherein n2 is an integer in the range from 3, 4, or 5,

[0112] (C) at least one dimethiconol, and

[0113] (D) at least one branched alkane having 8 to 16 carbon atoms. wherein the hair oil is essentially free of dimethicones, having a viscosity higher than 0.01 m2 / s (10 000 cSt).

[0114] 2. Hair oil according to embodiment 1 , wherein component (C) has a weight average molecular weight in the range of 400 000 to 1 300 000 g / mol.

[0115] 3. Hair oil according to embodiment 1 or 2, wherein the hair oil comprises

[0116] 0 to 30 %by weight of component (A),

[0117] 3 to 94.5 %by weight of component (B),

[0118] 0.1 to 20 %by weight of component (C), and

[0119] 5 to 70 %by weight of component (D), based on the total weight of the hair oil.

[0120] 4. Hair oil according to any of embodiments 1 to 3, wherein the hair oil comprises

[0121] 0 to 25 %by weight of component (A),

[0122] 5 to 89.5 %by weight of component (B),

[0123] 0.5 to 15 %by weight of component (C), and 10 to 65 %by weight of component (D), based on the total weight of the hair oil.

[0124] 5. Hair oil according to any of claims 1 to 4, wherein the hair oil comprises 0 to 20 %by weight of component (A),

[0125] 10 to 84 %by weight of component (B),

[0126] 1 to 10 %by weight of component (C), and

[0127] 15 to 60 %by weight of component (D), based on the total weight of the hair oil.

[0128] 6. Hair oil according to any of embodiments 1 to 5, wherein the hair oil is essentially free of decamethylcyclopentasiloxane.

[0129] 7. Hair oil according to any of embodiments 1 to 6, wherein the hair oil is essentially free of cyclomethicones.

[0130] 8. Hair oil according to any of embodiments 1 to 7, wherein the hair oil is essentially free of water.

[0131] 9. Hair oil according to any of embodiments 1 to 8, wherein the hair oil comprises as component (E) at least one alcohol.

[0132] 10. Hair oil according to any of embodiments 1 to 9, wherein component (A) has a viscosity in the range of 1.0 to < 2 x 10’6m2 / s (1 .0 to < 2 cSt).

[0133] 11. Hair oil according to any of embodiments 1 to 10, wherein component (B) has a viscosity in the range of 1.0 to < 5 x 10’6m2 / s (2.0 to < 5 cSt).

[0134] 12. Hair oil according to any of embodiments 1 to 11 , wherein the hair oil comprises as component (F) at least one natural oil.

[0135] 13. Hair oil according to any of embodiments 1 to 12, wherein component (E) is at least one alcohol selected from the group consisting of ethanol, n- propanol and isopropanol.

[0136] 14. Hair oil according to any of embodiments 1 to 13, wherein the hair oil is essentially free of dimethicones, selected from the group consisting of hexamethyldisiloxane, octamethyltrisiloxane, and decamethyltetrasiloxane. 15. Hair oil according to any of embodiments 1 to 14, wherein the hair oil does not contain component (A).

[0137] 16. Hair oil according to any of embodiments 1 to 15, wherein the hair oil does not contain hexamethyldisiloxane, octamethyltrisiloxane, and decamethyltetrasiloxane.

[0138] 17. Process for the cosmetic treatment of keratin fibers, preferably human hair, comprising the step of applying the hair oil according to any of embodiments 1 to 16 to the keratin fibers, preferably to the human hair.

[0139] 18. Use of the hair oil according to any of embodiments 1 to 16 for conditioning keratin fibers, preferably for conditioning the human hair.

[0140] Examples

[0141] The following examples illustrate the hair oil and the performance of the hair oil according to the presently claimed invention. These examples are not intended to be inclusive of all aspects of the subject matter disclosed herein, but rather to illustrate representative compositions and results. These examples are not intended to exclude equivalents and variations of the presently claimed invention, which are apparent to one skilled in the art.

[0142] Different hair oils were produced. The compositions of these hair oils are shown in table 1 below. Comparative examples C1 , C2, and C3 are reproductions of the hair oils as described in examples A, C and E of WO 2020 / 201410 A1. Examples 1 and 2 show a hair oils according to the presently claimed invention.

[0143] Table 1 :

[0144] Half Head Examination

[0145] The ability of the foregoing hair oil examples to condition the hair is examined by an half head comparison. The hair of panelists is parted in the middle into two sections from brow to neck. One of the sections is treated with the compositions of the present invention (examples 1 and 2), the other section is treated with the comparison hair oils (examples A, C, E of WO / 20201410). This examination is termed half-head comparison because the test and reference samples are applied to one half of the head respectively, thus enabling a direct comparison under identical test conditions (identical hair structure, degree of damage, hair color etc.).

[0146] The application amount of examples 1 , 2 and the reference hair oil (comparative examples C1 , C2, and C3) was 0.4 - 1g, depending on the hair length and hair amount of the panelists.

[0147] The following hair care criteria were judged by experienced stylists: dry combability, curl definition, frizz, elasticity, dry feel, coating evenness and hair shine.

[0148] Evaluation Criteria for Half Head Examination: Frizz:

[0149] Hair Frizz is evaluated optically - on straight hair styles via assessing if short strands sticking up at the part and throughout the hair length that "project away from the main body of hair", and on curly hair via assessing how much strands of wavy or curly hair do not align with others to form a defined wave or curl. The less hair sticking up on straight hair and the more defined / less unruly curls or waves are observed, the less frizzy the hair is.

[0150] Hair Shine:

[0151] Hair shine is evaluated by looking at the reflection of light on the hair under standard conditions (natural daylight or a daylight lamp). From a 0.5 m distance, and with slight head movements by the model, the light reflection or shine is evaluated as more / less.

[0152] Curl Definition:

[0153] The curl definition of the hair is evaluated by making a visual comparison of the two sections when the hair is dry. If the hair is more closely grouped this is evaluated as more curl definition. If the hair is more open this is evaluated as less curl definition.

[0154] Curl Uniformity:

[0155] The curl uniformity of the hair is evaluated by making a visual comparison of the two sections when the hair is dry. If the hair is evenly rounded from roots to the tips this is evaluated as more curl uniformity. If the curls are more inconsistent (straight at the roots / length and ends rounded) his is evaluated as less curl uniformity.

[0156] Lasting Curl Definition:

[0157] The lastingness of the curls is evaluated by touching the hair and going through the hair with the fingers for 3 times. If the given style shape / curl definition are still clearly recognizable and if the hair falls back into shape (curls are still bundled), this is described as more lastingness of the curls, if the curl bundle opens it is described as less lastingness of the curl definition.

[0158] Combability of the hair is assessed by placing an aluminum comb parallel to the middle parting and running it through the hair to the shoulder. The comb must remain at a 90° angle throughout and remain in contact with the scalp throughout combing to avoid varying comb angles. The amount of resistance / effort needed during combing is the basis for evaluating the product as easier to comb / more difficult to comb.

[0159] Feel:

[0160] When the hair is completely dry, the evaluating stylist assesses the dry feel of the hair. This is assessed by running the hair from root to end between the thumb and middle and index fingers, while simultaneously applying light pressure; or alternatively, by running lightly outspread fingers through the hair from root to end. If the hair runs easily through the fingers, this is referred to as a smooth feel; if the hair is impeded from running easily through the fingers, this is referred to as a coarse feel.

[0161] Examination Results

[0162] Half head examination was carried out with 5 test persons, the numbers indicated how many test persons were judged for each criterion.

[0163] Table 2:

[0164]

[0165] *These half head tests were carried out among two panelists.

[0166] **These half head tests were carried out among three panelists

[0167] Table 3: *These half head tests were carried out among two panelists. **These half head tests were carried out among three panelists

[0168] Table 4:

[0169] *These half head tests were carried out among four panelists. **These half head tests were carried out among two panelists

[0170] Table 5:

[0171] **These half head tests were carried out among three panelists

[0172] ***This half head test was carried out among two panelists Table 6:

[0173] ‘These half head tests were carried out among five panelists. “These half head tests were carried out among two panelists ***This half head test was carried out among three panelists Table 7:

[0174] **These half head tests were carried out among two panelists ***This half head test was carried out among three panelists The results of the half head examination indicate clearly that the inventive hair oils leads to better hair conditioning performance (frizz, shine, curl definition, curl uniformity and lasting curl definition) at basically equal / comparable dry heaviness versus comparative examples C1 , C2, and C3. Without being bound to a theory the inventors of the present invention assume that this surprising and advantageous effect is connected with the significant reduction of silicones having a viscosity higher than 10 000 cSt (0.01 m2 / s).

Claims

Claims1. Hair oil comprising as components(A) optionally at least one dimethicone of the formula (I) (CH3)3SiO[Si(CH3)2O]n1Si(CH3)3wherein n1 is 0, 1 , or 2,(B) at least one dimethicone of the formula (II) (CH3)3SiO[Si(CH3)2O]n2Si(CH3)3wherein n2 is an integer in the range from 3, 4, or 5,(C) at least one dimethiconol, and(D) at least one branched alkane having 8 to 16 carbon atoms, wherein the hair oil is essentially free of dimethicones, having a viscosity higher than 0.01 m2 / s.

2. Hair oil according to claim 1 , wherein component (C) has a weight average molecular weight in the range of 400 000 to 1 300 000 g / mol.

3. Hair oil according to claim 1 or 2, wherein the hair oil comprises 0 to 30 %by weight of component (A),3 to 94.9 %by weight of component (B),0.1 to 20 %by weight of component (C), and5 to 70 %by weight of component (D), based on the total weight of the hair oil.

4. Hair oil according to any of claims 1 to 3, wherein the hair oil comprises 0 to 25 %by weight of component (A),5 to 89.5 %by weight of component (B),0.5 to 15 %by weight of component (C), and10 to 65 %by weight of component (D), based on the total weight of the hair oil.

5. Hair oil according to any of claims 1 to 4, wherein the hair oil comprises 0 to 20 %by weight of component (A),10 to 84 %by weight of component (B),1 to 10 %by weight of component (C), and15 to 60 %by weight of component (D), based on the total weight of the hair oil.

6. Hair oil according to any of claims 1 to 5, wherein the hair oil is essentially free of decamethylcyclopentasiloxane.

7. Hair oil according to any of claims 1 to 6, wherein the hair oil is essentially free of cyclomethicones.

8. Hair oil according to any of claims 1 to 7, wherein the hair oil is essentially free of water.

9. Hair oil according to any of claims 1 to 8, wherein the hair oil comprises as component (E) at least one alcohol.

10. Hair oil according to any of claims 1 to 9, wherein component (A) has a viscosity in the range of 1 .0 to < 2 x 10’6m2 / s.

11. Hair oil according to any of claims 1 to 10, wherein component (B) has a viscosity in the range of 2.0 to < 5 x 10’6m2 / s.

12. Hair oil according to any of claims 1 to 11 , wherein the hair oil comprises as component (F) at least one natural oil.

13. Hair oil according to any of claims 1 to 12, wherein component (E) is at least one alcohol selected from the group consisting of ethanol, n-propanol and isopropanol.

14. Process for the cosmetic treatment of keratin fibers, preferably human hair, comprising the step of applying the hair oil according to any of claims 1 to 13 to the keratin fibers, preferably to the human hair.

15. Use of the hair oil according to any of claims 1 to 13 for conditioning keratin fibers, preferably for conditioning the human hair.

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