Composition for care of skin

Abstract

The present invention relates to an anhydrous composition for caring for the skin, in particular the scalp, comprising: (i) at least one ester oil of a fatty acid containing 14-20 carbon atoms and glycerol; (ii) at least one ester oil of fatty acid containing from 6 to 10 carbon atoms and glycerol; and (iii) a combination of hydrogenated rapeseed oil and hydrogenated palm oil, wherein the weight ratio of hydrogenated rapeseed oil to hydrogenated palm oil is from 45: 55 to 90: 10. The invention also relates to a non-therapeutic method for caring for the skin, in particular the scalp, comprising applying the composition to the skin, in particular the scalp.

Description

Technical Field

[0001] The present invention relates to a composition. In particular, the present invention relates to a composition for caring for the skin, especially the scalp. The present invention also relates to a non-therapeutic method for caring for the skin, especially the scalp. Background Art

[0002] The skin forms a physical barrier between the body and its surroundings. It is composed of two types of tissue: the epidermis and the dermis.

[0003] The dermis provides a solid support for the epidermis. The dermis is also a nourishing element for the epidermis. The dermis is mainly composed of fibroblasts and an extracellular matrix, which is mainly composed of collagen, elastin, and a substance called ground substance, which are synthesized by fibroblasts. Leukocytes, mast cells, or tissue macrophages are also found in the dermis. The dermis also contains blood vessels and nerve fibers.

[0004] The epidermis is a desquamating multilayer epithelium with an average thickness of 100 μm, and it is conventionally divided into a basal layer of keratinocytes constituting the germinal layer of the epidermis, a spinous layer consisting of several layers of polyhedral cells located on the germinal cells, a granular layer consisting of flat cells containing different cytoplasmic inclusions, transparent keratin granules, and an upper layer called the stratum corneum (or stratum corneum) consisting of the keratinocytes (called keratinocytes) in its terminal differentiation stage. These are mummified anucleated cells derived from keratinocytes. The stacking of these keratinocytes constitutes the stratum corneum, which is particularly responsible for the barrier function of the epidermis, that is, it constitutes a barrier against external attacks (especially chemical, mechanical or infectious attacks), and it also makes it possible to protect the body from dehydration.

[0005] In order to change the appearance of hair, many products have been developed for treating hair during dyeing, bleaching, perming and / or straightening.

[0006] During the application of products for dyeing the hair, the scalp may be stained by the applied product.

[0007] Therefore, there is a need to formulate cosmetic compositions for caring for the skin, particularly the scalp, which protect the scalp from stains.

[0008] Additionally, it is desirable that the composition be stable and have a suitable viscosity. SUMMARY OF THE INVENTION

[0010] An object of the present invention is to provide a composition for caring for the skin (especially the scalp) which can prevent the skin (especially the scalp) from being stained and is stable and has a suitable viscosity.

[0011] Thus, in a first aspect, the present invention provides an anhydrous composition for caring for the skin, in particular the scalp, comprising:

[0012] (i) at least one ester oil of a fatty acid containing 14 to 20 carbon atoms and glycerol;

[0013] (ii) at least one ester oil of a fatty acid containing 6 to 10 carbon atoms and glycerol; and

[0014] (iii) a combination of hydrogenated rapeseed oil and hydrogenated palm oil,

[0015] The weight ratio of hydrogenated rapeseed oil to hydrogenated palm oil is 45:55 to 90:10.

[0016] The composition according to the invention may be in the form of an oil gel or an oil balm.

[0017] In a second aspect, the present invention provides a non-therapeutic method for caring for the skin, particularly the scalp, comprising applying to the skin, particularly the scalp, a composition according to the first aspect of the invention.

[0018] It was found that the compositions according to the invention make it possible to avoid staining of the scalp by treatments on the hair.

[0019] It has also been found that the compositions according to the invention are stable and have a suitable viscosity.

[0020] Other subjects and features, aspects and advantages of the invention will emerge even more clearly on reading the detailed description and examples which follow. DETAILED DESCRIPTION OF THE INVENTION

[0022] In the following text and unless otherwise indicated, the upper and lower limits of a numerical range are included in the range, especially in the expressions "between ... and ..." and "ranging from ... to ...".

[0023] In addition, the expression "at least one" used in the present specification is equivalent to the expression "one or more".

[0024] Throughout this application, the term "comprising / includes" should be interpreted as covering all specifically mentioned features as well as optional, additional, unspecified features. As used herein, the use of the term "comprising / includes" also discloses embodiments in which there are no features other than the specifically mentioned features (i.e., "consisting of ...").

[0025] 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.” Therefore, unless indicated to the contrary, the numerical values ​​and parameters described herein are approximations that can be varied as required depending on the desired purpose.

[0026] 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 in this article shall apply.

[0027] Unless otherwise indicated, all percentages in the present invention are by weight.

[0028] For the purposes of the present invention, the term "anhydrous" means that the composition according to the invention contains less than 2% by weight and preferably less than 0.5% by weight of water relative to the total weight of the composition. Where appropriate, such small amounts of water may be provided by ingredients of the composition that contain water in residual amounts but not intentionally. In particular, no water is present in the composition.

[0029] According to a first aspect, the present invention provides an anhydrous composition for caring for the skin, in particular the scalp, comprising:

[0030] (i) at least one ester oil of a fatty acid containing 14 to 20 carbon atoms and glycerol;

[0031] (ii) at least one ester oil of a fatty acid containing 6 to 10 carbon atoms and glycerol; and

[0032] (iii) a combination of hydrogenated rapeseed oil and hydrogenated palm oil;

[0033] The weight ratio of hydrogenated rapeseed oil to hydrogenated palm oil is 45:55 to 90:10.

[0034] Contains esters of fatty acids with 14 to 20 carbon atoms and glycerol

[0035] According to a first aspect, the composition according to the invention comprises at least one ester oil of a fatty acid containing from 14 to 20 carbon atoms and of glycerol.

[0036] The fatty acids containing 14-20 carbons may be saturated or unsaturated. As examples of fatty acids containing 14-20 carbons, palmitic acid, stearic acid and arachidic acid may be mentioned.

[0037] Advantageously, the fatty acid contains from 14 to 18 carbon atoms, preferably from 16 to 18 carbon atoms.

[0038] Preferably, the ester oil of fatty acids containing 14 to 20 carbon atoms and glycerol is selected from vegetable oils.

[0039] More preferably, the ester oil of fatty acids containing 14 to 20 carbon atoms and glycerol is selected from vegetable oils, which contain at least one ester oil of fatty acids containing 14 to 20 carbon atoms (preferably 16 to 18 carbon atoms) and glycerol, such as sunflower oil, corn oil, soybean oil, zucchini oil, grape seed oil, sesame seed oil, hazelnut oil, apricot oil, macadamia oil, castor oil, olive oil; avocado oil; argan oil; camellia oil, palm oil, corn germ oil, cottonseed oil, peanut oil, pumpkin seed oil, wheat germ oil, babassu oil, coconut oil, rapeseed oil, almond oil, linseed oil, safflower oil and mixtures thereof.

[0040] Most preferably, the ester oil of fatty acids containing 14 to 20 carbon atoms and glycerol is chosen from sunflower seed oil, jojoba seed oil, argania spinosa kernel oil, coconut oil, corn oil, soybean oil, zucchini oil, grape seed oil, sesame seed oil, hazelnut oil, apricot oil, macadamia oil, castor oil and avocado oil.

[0041] As commercial products of vegetable oils suitable for the composition according to the invention, mention may be made of helianthus annuus (sunflower) seed oil sold under the name REFINED SUNFLOWER OIL by the company AAK KAMANIPRIVATE, simmondsia chinensis (jojoba) seed oil sold under the name JD FFL JOJOBA GOLDEN OIL by the company JOJOBA DESERT, cocos nucifera (coconut) oil sold under the name ACTIVATED VIRGIN COCONUT OIL by the company BIOTROPICS, argania spinosa kernel oil sold under the name LIPOFRUCTYL ARGAN BE LS 9779 by the company BASF BEAUTY CARE SOLUTION and prunus armeniaca (apricot) kernel oil sold under the name APRICOT KERNEL OIL REFINED DAC by the company GUSTAVHEESS.

[0042] Advantageously, the ester oil of fatty acids containing 14 to 20 carbon atoms and glycerol is present in an amount ranging from 10% to 90%, preferably from 30% to 80% and more preferably from 60% to 80% by weight relative to the total weight of the composition.

[0043] Oil containing esters of fatty acids with 6 to 10 carbon atoms and glycerol

[0044] According to a first aspect, the composition according to the invention comprises at least one ester oil of a fatty acid containing from 6 to 10 carbon atoms and glycerol.

[0045] The fatty acids containing 6 to 10 carbon atoms of the ester oils may be saturated or unsaturated, linear or branched.

[0046] For example, the fatty acid can be caproic acid, heptanoic acid, caprylic acid, nonanoic acid, capric acid, and combinations thereof.

[0047] In some embodiments, the at least one ester oil of a fatty acid containing 6-10 carbon atoms and glycerol is selected from triglycerides of caproic acid, heptanoic acid, caprylic acid, nonanoic acid, capric acid, and combinations thereof.

[0048] Preferably, the ester oil of fatty acids containing 6 to 10 carbon atoms and glycerol is caprylic / capric triglyceride.

[0049] As commercial product of caprylic / capric triglycerides, mention may be made of that sold under the name MASESTER E7000 LR01-1 / MB by the company PT MUSIM MAS.

[0050] Advantageously, the ester oil of fatty acids containing 6-10 carbon atoms and glycerol is present in an amount ranging from 5% to 35%, preferably from 10% to 30% and more preferably from 15% to 20% by weight relative to the total weight of the composition.

[0051] Hydrogenated Oil

[0052] According to a first aspect, a composition according to the invention comprises a combination of hydrogenated rapeseed oil and hydrogenated palm oil.

[0053] For the purposes of the present invention, the weight ratio of hydrogenated rapeseed oil to hydrogenated palm oil is from 45:55 to 90:10.

[0054] Preferably, the weight ratio of hydrogenated rapeseed oil to hydrogenated palm oil is 50:50 to 80:20.

[0055] More preferably, the weight ratio of hydrogenated rapeseed oil to hydrogenated palm oil is 50:50 to 70:30.

[0056] In some embodiments, the composition according to the present invention comprises a combination of hydrogenated rapeseed oil and hydrogenated palm oil, wherein the weight ratio of hydrogenated rapeseed oil to hydrogenated palm oil is 50:50.

[0057] As a commercial product of a combination of hydrogenated rapeseed oil and hydrogenated palm oil in which the weight ratio of hydrogenated rapeseed oil to hydrogenated palm oil is 50:50, mention may be made of that sold under the name DERMOFEEL VISCOLID MB by the company EVONIK.

[0058] Advantageously, the combination of hydrogenated rapeseed oil and hydrogenated palm oil is present in an amount ranging from 1% to 20% by weight, preferably from 3% to 17% by weight, more preferably from 5% to 10% by weight relative to the total weight of the composition.

[0059] Additional adjuvants or additives

[0060] The composition of the present invention may contain conventional cosmetic adjuvants or additives, such as fragrances, chelating agents (such as disodium EDTA), preservatives (such as chlorphenesin and phenoxyethanol) and bactericides, fillers, pH adjusters (such as citric acid, sodium hydroxide, potassium hydroxide) and mixtures thereof.

[0061] A person skilled in the art can select the amount of additional adjuvants or additives so as not to adversely affect the end use of the composition according to the invention.

[0062] According to a particularly preferred embodiment, the present invention provides an anhydrous composition for caring for the skin (especially the scalp), comprising, relative to the total weight of the composition:

[0063] (i) 60% to 80% by weight of at least one vegetable oil comprising at least one ester oil of a fatty acid containing 14 to 20 carbon atoms and glycerol;

[0064] (ii) 15 to 20 wt. % caprylic / capric triglyceride; and

[0065] (iii) 5 to 10 wt. % of a combination of hydrogenated rapeseed oil and hydrogenated palm oil,

[0066] The weight ratio of hydrogenated rapeseed oil to hydrogenated palm oil is 50:50 to 70:30.

[0067] Galenic Forms and Uses

[0068] The composition according to the invention may be in the form of an oil gel or an oil balm.

[0069] The viscosity of the composition according to the invention can be measured at 25°C using a ProRheo R180 viscometer equipped with a spindle M4 rotating at 200 rpm.

[0070] According to a preferred embodiment, the viscosity of the composition of the invention is 2.4*10 3 mpa·s to 19.2*10 3 mpa·s, preferably 2.4*10 3 mpa·s to 12*10 3mpa·s.

[0071] The composition according to the invention is stable, ie the composition can be kept unchanged at 4°C or 45°C for at least 2 months without oil leakage.

[0072] According to a second aspect, the present invention provides a non-therapeutic method for caring for the skin, particularly the scalp, comprising applying to the skin, particularly the scalp, a composition according to the first aspect of the invention.

[0073] The composition according to the invention protects the skin, in particular the scalp, from staining.

[0074] The following examples serve to illustrate the invention but are non-limiting in nature. Example

[0075] The main raw materials used, their trade names and suppliers are listed in Table 1.

[0076] Table 1

[0077]

[0078] Inventive Example (IE.1) 1 and Comparative Examples 1-3

[0079] Compositions according to Inventive Example (IE) 1 and compositions according to Comparative Examples (CE) 1-3 were prepared according to the contents given in Table 2 (the contents are expressed as weight percentages of active material relative to the total weight of the respective composition unless otherwise indicated).

[0080] Table 2

[0081]

[0082] *: The weight ratio of hydrogenated rapeseed oil to hydrogenated palm oil is 50:50.

[0083] **: A combination of hydrogenated rapeseed oil and hydrogenated palm oil, wherein the weight ratio of hydrogenated rapeseed oil to hydrogenated palm oil is 40:60.

[0084] Preparation method:

[0085] Taking the composition of Inventive Example 1 as an example, the composition listed above was prepared as follows:

[0086] 1). Mix helianthus annuus (sunflower) seed oil and caprylic / capric triglyceride to obtain an oil phase, and heat the mixture to 80° C. and homogenize the oil phase by stirring;

[0087] 2). Add hydrogenated rapeseed oil (and) hydrogenated palm oil to the oil phase and homogenize by stirring; and

[0088] 3). Discharge at 35℃.

[0089] The composition of Inventive Example 1 is an oil gel.

[0090] Evaluate

[0091] Each of the compositions prepared above was characterized for viscosity, stability and protective ability.

[0092] Viscosity

[0093] The viscosity is measured at 25° C. using a Rheomat R180 viscometer equipped with an M4 spindle, the measurement being carried out after the spindle has been rotated in the composition at a shear rate of 200 rpm for 30 seconds (after which time a stabilization of the viscosity and the spindle rotation speed is observed).

[0094] The viscosity results are summarized in Table 3.

[0095] Table 3

[0096]

[0097] stability

[0098] The appearance of each composition prepared above when stored at 4° C. or 45° C. for 2 months was observed to evaluate the stability of the composition.

[0099] The stability results are summarized in Table 4.

[0100] Table 4

[0101]

[0102] Protection

[0103] The in vitro protective effects of the composition of Inventive Example 1 and the compositions of Comparative Examples 1 to 3 were evaluated as follows.

[0104] 1. 4cm 2 The pigskin was washed with conventional shampoo without conditioning and dried.

[0105] 2. The composition to be tested is 2 Apply to pig skin.

[0106] 3. An oxidative hair coloring product (a mixture of a black coloring paste and a developer containing 30% by volume of H2O2 mixed in a volume ratio of 1:1.5) was then added to the mixture at 75 μ / cm 2 Apply on pig skin for 30 minutes.

[0107] 4. Rinse the pigskin with regular shampoo without conditioning,

[0108] 5. Collect images and assess scalp staining.

[0109] The results of scalp staining are summarized in Table 5.

[0110] Table 5

[0111] Ngc* IE.1 CE.1 CE.2 CE.3 Scalp stains (%) 90 10 30 50 70

[0112] Ngc* means no protective composition was applied.

[0113] 80% to 100% scalp staining indicates complete black staining on pig skin.

[0114] 60% to 80% scalp staining indicates mostly black staining on pig skin.

[0115] 40-60% scalp staining indicates that approximately half of the staining on pig skin is black.

[0116] 10-30% scalp staining indicates less black staining on pig skin.

[0117] As can be seen from Table 5, compared with the compositions of Comparative Examples 1-3, the composition of Inventive Example 1 can provide better protection.

Claims

1. An anhydrous composition for caring for the skin, especially the scalp, comprising: (i) at least one ester oil of a fatty acid containing 14 to 20 carbon atoms and glycerol; (ii) at least one ester oil of a fatty acid containing 6 to 10 carbon atoms and glycerol; and (iii) a combination of hydrogenated rapeseed oil and hydrogenated palm oil, The weight ratio of hydrogenated rapeseed oil to hydrogenated palm oil is 45:55 to 90:

10.

2. The composition according to claim 1, wherein the ester oil of fatty acids containing 14 to 20 carbon atoms and glycerol is chosen from vegetable oils comprising at least one ester oil of fatty acids containing 14 to 20 carbon atoms, preferably 16 to 18 carbon atoms, and glycerol, such as sunflower oil, jojoba seed oil, argania spinosa kernel oil, coconut oil, corn oil, soybean oil, zucchini oil, grape seed oil, sesame seed oil, hazelnut oil, apricot oil, macadamia oil, castor oil and avocado oil.

3. A composition according to claim 1 or 2, wherein the ester oil of fatty acids containing 14-20 carbon atoms and glycerol is present in an amount ranging from 10% to 90% by weight, preferably from 30% to 80% by weight, more preferably from 60% to 80% by weight, relative to the total weight of the composition.

4. The composition according to any one of claims 1 to 3, wherein the fatty acids containing 6 to 10 carbon atoms of the ester oil may be saturated or unsaturated, linear or branched.

5. The composition according to any one of claims 1 to 4, wherein the at least one ester oil of a fatty acid containing 6-10 carbon atoms and glycerol is selected from triglycerides of caproic acid, heptanoic acid, caprylic acid, nonanoic acid, capric acid and combinations thereof, preferably, the at least one is caprylic / capric triglyceride.

6. A composition according to any one of claims 1 to 5, wherein the ester oil of fatty acids containing 6-10 carbon atoms and glycerol is present in an amount ranging from 5% to 35% by weight, preferably from 10% to 30% by weight, more preferably from 15% to 20% by weight, relative to the total weight of the composition.

7. The composition according to any one of claims 1 to 6, wherein the weight ratio of hydrogenated rapeseed oil to hydrogenated palm oil is from 50:50 to 80:20, preferably from 50:50 to 70:

30.

8. A composition according to any one of claims 1 to 7, wherein the combination of hydrogenated rapeseed oil and hydrogenated palm oil is present in an amount ranging from 1% to 20% by weight, preferably from 3% to 17% by weight, more preferably from 5% to 10% by weight, relative to the total weight of the composition.

9. The cosmetic composition according to claim 1, comprising, relative to the total weight of the composition: (i) 60% to 80% by weight of at least one vegetable oil comprising at least one ester oil of a fatty acid containing 14 to 20 carbon atoms and glycerol; (ii) 15 to 20 wt. % caprylic / capric triglyceride; and (iii) 5 to 10 wt. % of a combination of hydrogenated rapeseed oil and hydrogenated palm oil, The weight ratio of hydrogenated rapeseed oil to hydrogenated palm oil is 50:50 to 70:

30.

10. The composition according to any one of claims 1 to 9, wherein the composition of the invention is in the form of an oil gel or an oil balm.

11. A non-therapeutic method for caring for the skin, in particular the scalp, comprising applying to the skin, in particular the scalp, a composition according to any one of claims 1 to 10.

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