Hair oil comprising two different low viscosity dimethicones and dimethiconol

Abstract

The presently claimed invention relates to a hair oil comprising as components (A) at least one dimethicone of the formula (I), (B) at least one dimethicone of the formula (II), and (C) at least one dimethiconol. 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 two different low viscosity dimethicones and dimethiconol

[0002] Description

[0003] The presently claimed invention relates to a hair oil comprising as components (A) at least one dimethicone of the formula (I), (B) at least one dimethicone of the formula (II), and (C) at least one dimethiconol. 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. Moreover, it is known practice to use haircare compositions in the form of hair oils, containing silicone oils. A drawback of these compositions is the fact, that such compositions often result in excessive greasing which results in the human hair having a greasy feel and a charged visual appearance. 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 dimethiconol(s) and two different polydimethylsiloxanes, having different viscosities. The first polydimethylsiloxane has a viscosity below 200 cSt, the second polydimethylsiloxane has a viscosity in the range of 10 000 to 1 000 000 cSt.

[0009] The haircare composition disclosed in WO 2020 / 201410 A1 , however, comprises the one or more branched alkanes having from 8 to 16 carbon atoms as a major component.

[0010] There is a need for providing a hair oil that has a reduced content of branched alkanes having from 8 to 16 carbon atoms, preferably a reduced content of mineral oil-based components. It is an object of the presently claimed invention to provide a hair oil having a reduced content of branched alkanes having from 8 to 16 carbon atoms, 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) at least one dimethicone of the formula (I) (CH3)3SiO[Si(CH3)2O]n1Si(CH3)3, wherein n1 is an integer in the range of 0 to 18,

[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 1 to 19, and

[0014] (C) at least one dimethiconol, wherein n1 is smaller than n2, and wherein the hair oil contains, based on the total weight of the hair oil, less than 20 % by weight of branched alkanes having 8 to 16 carbon atoms, and wherein the hair oil contains, based on the total weight of the hair oil, less than 1 % by weight of silicones, other than component (C), having a viscosity higher than 0.01 m2 / s, and wherein the hair oil comprises

[0015] 5 to 50 % by weight of component (A),

[0016] 30 to 90 % by weight of component (B), and

[0017] 2 to 20 % by weight of component (C), based on the total weight of the hair oil.

[0018] 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.

[0019] The presently claimed invention will be described in more detail hereinafter.

[0020] The viscosity of the components (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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] Component (A) 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.

[0025] 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).

[0026] In formula (I)

[0027] (CH3)3SiO[Si(CH3)2O]n1Si(CH3)3n1 is generally an integer in the range of 0 to 18, preferably in the range of 1 to 15, more preferably in the range of 0 to 10, and particularly preferred in the range of 1 to 4.

[0028] 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). If n1 is 3 the dimethicone of formula (I) is dodecamethylpentasiloxane (CAS No. 141-63-9). If n1 is 4 the dimethicone of formula (I) is tetradecamethylhexasiloxane (CAS No- 107-52-8). And so on.

[0029] In a particularly preferred embodiment component (A) is at least one dimethicone selected from the group consisting of hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, and dodecamethylpentasiloxane.

[0030] In an even more preferred embodiment component (A) is at least one dimethicone selected from the group consisting of octamethyltrisiloxane, decamethyltetrasiloxane, and dodecamethylpentasiloxane.

[0031] In the most preferred embodiment component (A) is decamethyltetrasiloxane.

[0032] 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.

[0033] Such a dimethicone has in particular a saturation vapour pressure ranging from 0.13 to 40 000 Pa (10’3to 300 mmHg), in particular ranging from 1.3 to 13 000 Pa (0.01 to 100 mmHg), and more particularly ranging from 1.3 to 1300 Pa (0.01 to 10 mmHg).

[0034] 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 260°C.

[0035] In the hair oil component (A) is generally present in an amount of 5 to 50 wt.%, preferably in an amount of 10 to 40 wt.%, and more preferred in an amount of 15 to 40 wt.%, based on the total weight of the hair oil.

[0036] Component (B)

[0037] 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.

[0038] 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).

[0039] In formula (II)

[0040] (CH3)3SiO[Si(CH3)2O]n2Si(CH3)3 n2 is generally an integer in the range of 1 to 19, preferably in the range of 2 to 16, more preferably in the range of 1 to 11 , and particularly preferred in the range of 2 to 5.

[0041] If n2 is 1 the dimethicone of formula (II) is octamethyltrisiloxane (CAS No. 107- 51-7). If n2 is 2 the dimethicone of formula (I) is decamethyltetrasiloxane (CAS No. 141-62-8). 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). And so on.

[0042] In a particularly preferred embodiment component (B) is at least one dimethicone selected from the group consisting of dodecamethylpentasiloxane and tetradecamethylhexasiloxane.

[0043] In the most preferred embodiment component (B) is dodecamethylpentasiloxane.

[0044] In in the at least one dimethicone of the formula (II) used as component (B) n2 is an integer higher than n1 in formula (I). In other words, in formula (I) n1 is an integer smaller than n2 in formular (II).

[0045] In case as component (A) a mixture of two or more dimethicones of formular (I) is used, as component (B) at least one dimethicone o formula (II) is used, wherein n2 is an integer higher than the highest integer n1 of the dimethicone used in component (A).

[0046] 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.

[0047] In the hair oil component (B) is generally present in an amount of 30 to 90 wt.%, preferably in an amount of 45 to 85 wt.%, and more preferred in an amount of 45 to 80 wt.%, based on the total weight of the hair oil.

[0048] Component (C)

[0049] In the present case the terms “(C)”, “component (C)”, and “at least one dimethiconol” are used synonymously, and therefore preferably have the same meaning.

[0050] The term “at least one dimethiconol” in the present case means exactly one dimethiconol, and mixtures of two or more different dimethiconols. The name dimethiconol is known per se by the skilled person and denotes a polydimethylsiloxane comprising dimethylsilanol end groups.

[0051] 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.

[0052] In the hair oil component (C) is generally present in an amount of 2 to 20 wt.%, preferably in an amount of 3 to 15 wt.%, and more preferred in an amount of 4 to 15 wt.%, based on the total weight of the hair oil.

[0053] The hair oil in one embodiment may comprise as component (D) at least one alcohol. Suitable alcohols may be selected from the group consisting of ethanol, n-propanol and isopropanol. The hair oil comprises component (D), 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.

[0054] In another embodiment the hair oil may comprise as component (E) 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 (E), 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.

[0055] The hair oil may comprise further components, like fragrances, vitamins, fatty substances, preservatives, emulsifiers, and the like.

[0056] Hair oil composition

[0057] The hair oil composition comprises components (A), (B), and (C) as described above.

[0058] In one embodiment the hair oil, comprises 5 to 50 %by weight of component (A), 30 to 90 %by weight of component (B), and 2 to 20 %by weight of component (C), based on the total weight of the hair oil.

[0059] In a preferred embodiment the hair oil, comprises

[0060] 10 to 40 %by weight of component (A),

[0061] 45 to 85 %by weight of component (B), and

[0062] 3 to 15 %by weight of component (C), based on the total weight of the hair oil.

[0063] In a more preferred embodiment the hair oil, comprises

[0064] 15 to 40%by weight of component (A),

[0065] 45 to 80 %by weight of component (B), and

[0066] 4 to 15 %by weight of component (C), based on the total weight of the hair oil.

[0067] In another embodiment the hair oil comprises based on the total weight of the hair oil, less than 10 %by weight, more preferred less than 5 %by weight, and particularly preferred less than 1 % by weight of branched alkanes having 8 to

[0068] 16 carbon atoms.

[0069] In an especially preferred embodiment, the hair oil does not contain branched alkanes having 8 to 16 carbon atoms.

[0070] 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 cyclomethicone(s).

[0071] 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.

[0072] 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). 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.

[0073] 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 (0.01 m2 / s). 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 (0.01 m2 / s), based on the total weight of the hair oil.

[0074] 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 (0.01 m2 / s).

[0075] The hair oil according to the invention is advantageously in the form of a clear to translucent, more preferred clear, fluid.

[0076] 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.

[0077] 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 irn) geometry; rotational speed 200 revolutions / min; measurements carried out at 25°C, 1 atm.

[0078] 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.

[0079] Embodiments Hair oil comprising as components

[0080] (A) at least one dimethicone of the formula (I) (CH3)3SiO[Si(CH3)2O]n1Si(CH3)3wherein n1 is an integer in the range of 0 to 18,

[0081] (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 1 to 19, and

[0082] (C) at least one dimethiconol, wherein n1 is smaller than n2, and wherein the hair oil contains, based on the total weight of the hair oil, less than 20 % by weight of branched alkanes having 8 to 16 carbon atoms, and wherein the hair oil contains, based on the total weight of the hair oil, less than 1 % by weight of silicones, other than component (C), having a viscosity higher than 0.01 m2 / s, and wherein the hair oil comprises

[0083] 5 to 50 % by weight of component (A),

[0084] 30 to 90 % by weight of component (B), and

[0085] 2 to 20 % by weight of component (C), based on the total weight of the hair oil. Hair oil according to embodiment 1 , wherein n1 is an integer in the range of 1 to 15, and n2 is an integer in the range of 2 to 16. Hair oil according to embodiment 1 or 2, wherein component (C) has a weight average molecular weight in the range of 400 000 to 1 300 000 g / mol. Hair oil according to any of embodiments 1 to 3, wherein the hair oil contains, based on the total weight of the hair oil, less than 10 %by weight, and more preferred less than 5 %by weight of branched alkanes having 8 to 16 carbon atoms. 5. Hair oil according to any of embodiments 1 to 4, wherein the hair oil is essentially free of decamethylcyclopentasiloxane.

[0086] 6. Hair oil according to any of embodiments 1 to 5, wherein the hair oil is essentially free of cyclomethicone(s).

[0087] 7. Hair oil according to any of embodiments 1 to 6, wherein the hair oil is essentially free of water.

[0088] 8. Hair oil according to any of embodiments 1 to 7, wherein the hair oil comprises as component (D) at least one alcohol.

[0089] 9. Hair oil according to any of embodiments 1 to 8, wherein the hair oil comprises as component (E) at least one natural oil.

[0090] 10. Hair oil according to any of embodiments 1 to 9, wherein component (A) has a viscosity in the range of 1 .0 to 5 cSt (1.0 to 5 x 10’6m2 / s).

[0091] 11. Hair oil according to any of embodiments 1 to 10, wherein component (B) has a viscosity in the range of 1 .5 to 10 cSt (1 .5 to 10 x 10’6m2 / s.

[0092] 12. Hair oil according to any of embodiments 1 to 11 , wherein component (B) has a higher viscosity than component (A).

[0093] 13. Hair oil according to any of embodiments 1 to 12, wherein the hair oil is essentially free of silicones, other than dimethiconol (component (C)) having a viscosity higher than 10 000 cSt (0.01 m2 / s).

[0094] 14. Hair oil according to any of embodiments 1 to 13, wherein component (D) is at least one alcohol selected from the group consisting of ethanol, n- propanol and isopropanol.

[0095] 15. 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 14 to the keratin fibers, preferably to the human hair.

[0096] 16. Use of the hair oil according to any of embodiments 1 to 14 for conditioning keratin fibers, preferably for conditioning the human hair. Examples

[0097] 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.

[0098] Different hair oils were produced. The composition of these hair oils is shown in table 1 below. Comparative examples C1 , C2, and C3 are hair oils similar to those described in examples A, C and E of WO 2020 / 201410 A1 . Example 1 shows a hair oil according to the presently claimed invention.

[0099] Table 1 :

[0100] Half Head Comparison

[0101] The ability of the foregoing hair oil examples to condition the hair is examined by a 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 hair oil according to the present invention (Example), the other section is treated with the comparative hair oils (Comparative examples; examples A, C, E of WO 2020 / 201410 A1). 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.). The application amount of the hair oil examples 1 and the comparative hair oils (comparative examples 1 , 2, and 3) was 0.4 to 1g, depending on the hair length and hair amount of the panelists.

[0102] The following hair care criteria were judged by experienced stylists: dry combability, curl definition, frizz, elasticity, dry feel, coating evenness, hair shine, and dry heaviness.

[0103] Evaluation Criteria for Half Head Examination:

[0104] Dry Combability:

[0105] 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. This test is carried out on dry hair. The evaluation is conducted manually and is compared to the combability of the hair with reference hair oil.

[0106] Curl Definition:

[0107] Curl definition of hair is evaluated visually, by comparing the curl result of the two sections against each other when the hair is in the dry state. If the hair on one side appears to be more closely grouped, this is evaluated as more / less curl definition / texture.

[0108] Curl Uniformity:

[0109] 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. Lasting Curl Definition:

[0110] 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.

[0111] Frizz:

[0112] 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.

[0113] Elasticity:

[0114] The elasticity of the hair is assessed by first brushing through the hair with a normal salon brush, and then combing through using a wide toothed comb. If the hair falls faster / better into the given style shape, this is described as more / less elasticity.

[0115] Dry Feel:

[0116] 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.

[0117] Coating evenness:

[0118] Coating is assessed by sliding the fingers through the hair from the roots to the ends. Apply light pressure. If an even / uneven film can be felt throughout the entire length this is defined as coating. An even respectively homogeneous coating is preferred.

[0119] Hair Shine:

[0120] 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 distance of 0.5 m, and with slight head movements by the model, the light reflection or shine is evaluated as more / less.

[0121] Dry Heaviness:

[0122] Dry heaviness of hair is evaluated by sliding the fingers through the dry hair from the roots to the ends with light pressure. If the hair feels clean / pure we refer to a not heavy feel, if the hair feels coated / heavy we refer to a heavy feel.

[0123] Examination Results

[0124] Half head comparison examination was carried out with 5 test persons, the numbers indicated how many test persons were judged for each criterion.

[0125] Table 2:

[0126] *These half head tests were carried out among two panelists.

[0127] Table 3:

[0128] *These half head tests were carried out among two panelists.

[0129] Table 4:

[0130] *These half head tests were carried out among two panelists

[0131] The results of the half head examination indicate clearly that the inventive hair oil 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 1 , 2, and 3. 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 isododecane and silicones having a viscosity higher than 10 000 cSt (0.01 m2 / s).

Claims

Claims1. Hair oil comprising as components(A) at least one dimethicone of the formula (I) (CH3)3SiO[Si(CH3)2O]n1Si(CH3)3wherein n1 is an integer in the range of 0 to 18,(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 1 to 19, and(C) at least one dimethiconol, wherein n1 is smaller than n2, and wherein the hair oil contains, based on the total weight of the hair oil, less than 20 % by weight of branched alkanes having 8 to 16 carbon atoms, and wherein the hair oil contains, based on the total weight of the hair oil, less than 1 % by weight of silicones, other than component (C), having a viscosity higher than 0.01 m2 / s, and wherein the hair oil comprises5 to 50 % by weight of component (A),30 to 90 % by weight of component (B), and2 to 20 % by weight of component (C), based on the total weight of the hair oil.

2. Hair oil according to claim 1 , wherein n1 is an integer in the range of 1 to 15, and n2 is an integer in the range of 2 to 16.

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

4. Hair oil according to any of claims 1 to 3, wherein the hair oil contains, based on the total weight of the hair oil, less than 10 %by weight, and more preferred less than 5 %by weight of branched alkanes having 8 to 16 carbon atoms.

5. Hair oil according to any of claims 1 to 4, wherein the hair oil is essentially free of decamethylcyclopentasiloxane, and preferably is essentially free of cyclopentasiloxane(s), and even more preferably is essentially free of cyclomethicone.

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

7. Hair oil according to any of claims 1 to 6, wherein the hair oil comprises as component (D) at least one alcohol.

8. Hair oil according to any of claims 1 to 7, wherein the hair oil comprises as component (E) at least one natural oil.

9. Hair oil according to any of claims 1 to 8, wherein component (A) has a viscosity in the range of 1 .0 to 5 x 10’6m2 / s .

10. Hair oil according to any of claims 1 to 9, wherein component (B) has a viscosity in the range of 1 .5 to 10 x 10’6m2 / s.

11. Hair oil according to any of claims 1 to 10, wherein component (B) has a higher viscosity than component (A).

12. Hair oil according to any of claims 1 to 11 , wherein component (D) is at least one alcohol selected from the group consisting of ethanol, n-propanol and isopropanol.

13. 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 12 to the keratin fibers, preferably to the human hair.

14. Use of the hair oil according to any of claims 1 to 12 for conditioning keratin fibers, preferably for conditioning the human hair.

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