Cosmetic composition comprising bilberry leaf extract
Patent Information
- Application Number
- PCT/CN2025/083037
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-03-20
- Filing Date
- 2025-03-18
- Publication Date
- 2025-11-27
AI Technical Summary
Cosmetic compositions containing Bilberry seed extract tend to form precipitates upon storage at lower temperatures, causing turbidity and stability issues.
A cosmetic composition comprising a Bilberry seed extract and an oily cosmetic base, which includes specific emollients and emulsifiers such as polar esters, ethers, and alcohols, along with emulsifiers like dipentaerythrityl fatty acid esters and polysorbate fatty acid esters, is formulated to maintain uniformity and clarity over extended periods and at reduced temperatures.
The composition remains stable and clear, preventing precipitation and clouding, while providing skin benefits such as improved hydration, barrier function, and anti-inflammatory effects.
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Figure CN2025083037_27112025_PF_FP_ABST
Abstract
Description
Cosmetic Composition
[0001] The present disclosure relates to a cosmetic composition comprising a Bilberry seed extract and an oily cosmetic base.
[0002] The desire to appear attractive is naturally rooted in modern consumers. Even as the ideal of attractiveness undergoes change over the course of time, it is universally accepted that the condition and appearance of our skin and hair is a significant contributor to an attractive outward appearance.
[0003] Today’s consumers are offered a multitude of cosmetic products for the care of skin. Generally, these products are in the form of creams and lotions, containing water for moisturizing the skin, and fats and lipids for re-greasing it, and their effects are mostly exerted on the outer-most layer of the skin. There is a wide variety of cosmetic actives for skin care available on the market, offering benefits such as moisturization or hydration, anti-ageing, UV protection, soothing, lightening or darkening, etc.
[0004] The skin represents our natural barrier to external threats. It has the unique characteristics of being “permeable” to the good and “impermeable” to the bad, preventing water loss while protecting against chemical and mechanical damage and pathogenic microorganisms. This barrier function takes place thanks to a sophisticated structure, the skin being mainly composed of lipids (mostly ceramides) , which require polyunsaturated fatty acids (PUFA) to be produced, and corneocytes immersed in the lipidic matrix, which are the result of the terminal differentiation of keratinocytes.
[0005] If the skin’s barrier function is impaired, excessive water loss takes place and conditions like skin dryness, itching, eczema and dermatitis may occur, resulting in unhealthy skin that has lost its primary defence function. In order to restore the skin barrier, it is essential to supply skin with essential PUFA (omega-3 fatty acid like α-linolenic acid and omega-6 fatty acid like linoleic acid) , in order to allow the formation of ceramides, promote keratinocytes differentiation for the formation of corneocytes, and activate peroxisome proliferator-activated receptors (PPAR) for the restoration of the homeostasis.
[0006] PUFA have also been reported to play a role in decreasing the hair fiber permeability, hence protecting the hair structure.
[0007] Bilberry, or Vaccinium myrtillus L., is a small shrub growing on hilly heaths and under bush throughout Central and Northern Europe. Differently from blueberries, its fruits are not produced in clusters but only as single fruits, which need to be hand-picked, as they are delicate and easily susceptible to mechanical damage. Bilberries are used to extract anthocyanidins from the pulp and fruit skin.
[0008] The tiny seeds of the berries contain up to 20%of linoleic acid (LA) and α-linolenic acid (ALA) in an optimal ratio. These classes of lipids, very important to our skin, are extracted by a CO2 supercritical extraction in an upcycling process in order to obtain OmegablueTM, a cosmetic active developed by Givaudan.
[0009] OmegablueTM is an upcycled active ingredient from bilberry seeds, containing the essential fatty acids crucial for the formation of our skin barrier like linoleic acid and α-linolenic acid, also known as PUFA (PolyUnsaturated Fatty Acids) . The bilberry seeds are obtained as a by-product of a major extraction of anthocyanins from the fruit skin and pulp.
[0010] When applied to the skin in cosmetic formulations, OmegablueTM improves hydration and skin barrier functionality. Due to the fact that it contains essential PUFA relevant for the anti-inflammatory cascade, it is also able to effectively sooth challenged skin.
[0011] More specifically, OmegablueTM has been shown to increase keratinocytes proliferation in vitro by 44%, hence mimicking the potentiality of EGF (Epidermal Growth Factor) and providing the basis for an ameliorated skin barrier function, and to improve PPAR-α activation up to 26-fold, hence demonstrating its ability to stimulate keratinocytes differentiation in view of skin barrier function improvement. It has also been found to fully restore skin barrier function after surfactant-induced depletion in a clinical test.
[0012] There are specific skin conditions where the skin barrier function is impaired and this leads to discomfort like itchy, flaky skin: Psoriasis is a specific skin condition in which the skin cells’ cycle is highly accelerated, resulting in itchy patches of skin covered with flakes; and eczema is a specific skin condition, which is characterised by skin redness and itching. OmegablueTM has been shown to decrease skin erythema severity by 27%and scales formation by 28%in psoriasis cases, and to reduce skin erythema severity by 37.5%and itching rating by 42.8%in eczema cases. In addition, the PASI (Psoriasis Area Severity Score) and EASI (Eczema Area Severity Score) were markedly ameliorated by 27%and 35%respectively.
[0013] On hair, OmegablueTM exhibits an anti-fragility effect and makes the hair fiber less permeable. The recommended dosage for Bilberry seed extract in cosmetic compositions is 2-10%. It is an oily, dark green substance, which is generally expected to be oil-soluble.
[0014] However, in oily cosmetic compositions, it tends to form precipitates upon longer storage and / or at lower temperature, causing turbidity of the compositions. This causes significant issues, as cosmetic compositions tend to be stored at lower temperature, in particular if stored over extended periods of time.
[0015] There is therefore a need to provide a cosmetic composition comprising Bilberry seed extract and an oily cosmetic base, which composition is fully stable and remains uniform and clear even after storage for an extended period of time and / or at reduced temperature.
[0016] This problem has been solved by the cosmetic composition of the present invention, its preparation method and its applications in cosmetics.
[0017] In a first aspect, the present invention provides a cosmetic composition comprising a cosmetic active ingredient and an oily cosmetic base, wherein the cosmetic active ingredient comprises or consists of a Bilberry seed extract, and wherein the oily cosmetic base comprises or consists of an emollient, an emulsifier, or a mixture of one or more emollients and one or more emulsifiers.
[0018] The one or more emollients are selected from the group consisting of a polar ester emollient, a polar ether emollient, a polar alcohol emollient, and a mixture thereof.
[0019] The one or more emulsifiers are selected from the group consisting of:
[0020] (a) a dipentaerythrityl fatty acid ester consisting of a dipentaerythrityl moiety, to which 3-6 C18 fatty acid moieties are covalently attached,
[0021] (b) a fatty acid ester of a polyglycerol consisting of a polyglyceryl backbone with 2-10 polyglyceryl units, to which polyglyceryl backbone 1-10 fatty acid moieties are covalently attached, wherein the fatty acid moieties are C18 fatty acid moieties, and wherein the emulsifier has an HLB value of about 4 to about 8, with the proviso that the emulsifier is not polyglyceryl-2 dipolyhydroxystearate and not polyglyceryl-3 diisostearate,
[0022] (c) a fatty acid ester of a polyethylene glycol consisting of a polyethylene glycol backbone with 4-10 polyethylene glycol units, to which polyethylene glycol backbone one or two fatty acid moieties are covalently attached, wherein the fatty acid moieties are C18 fatty acid moieties,
[0023] (d) a polysorbate fatty acid ester consisting of an ethoxylated sorbitan backbone with 20 oxyethylene units, to which ethoxylated sorbitan backbone a C18 fatty acid moiety is covalently attached,
[0024] (e) a sorbitan fatty acid ester consisting of a sorbitan moiety, to which one or two C18 fatty acid moieties are covalently attached,
[0025] (f) trilaureth-4 phosphate
[0026] (g) laureth-4, and
[0027] (h) a mixture of one or more of the emulsifiers (a) through (g) .
[0028] Surprisingly, it has been found that by including an emollient and / or an emulsifier as defined above in the cosmetic composition, it is possible to maintain a uniform and clear appearance of the composition comprising Bilberry seed oil over an extended period of time and even at lower temperatures, avoiding precipitation or clouding. Furthermore, the cosmetic composition of the present invention is liquid at room temperature.
[0029] In a second aspect, the present invention provides a method of preparing the cosmetic composition of the invention, the method comprising the steps of:
[0030] (i) heating the emollient and / or emulsifier to a temperature of between about 50 ℃ and about 80 ℃;
[0031] (ii) adding the cosmetic active ingredient; and
[0032] (iii) mixing to obtain the cosmetic composition.
[0033] In a third aspect, the present invention provides a method of preventing skin photo-ageing, stimulating keratinocytes proliferation, improving skin barrier, alleviating skin erythema and / or alleviating itching symptoms by applying the cosmetic composition of the invention to human skin.
[0034] In a fourth aspect, the present invention provides a use of the cosmetic composition of the invention for preventing skin photo-ageing, stimulating keratinocytes proliferation, improving skin barrier, alleviating skin erythema and / or alleviating itching symptoms.
[0035] For the avoidance of doubt, preferences, options, particular features and the like indicated for a given aspect, feature or parameter of the invention should, unless the context indicates otherwise, be regarded as having been disclosed in combination with any and all other preferences, options, particular features and the like as indicated for the same or other aspects, features and parameters of the invention.
[0036] For the avoidance of doubt, in this specification when we use the term “comprising” or “comprises” , we mean that the composition or antioxidant or product being described must contain the listed ingredient (s) but may optionally contain additional ingredients. When we use the term “consisting essentially of” or “consists essentially of” , we mean that the composition being described must contain the listed ingredient (s) and may also contain small (for example up to 5%by weight, or up to 1%or 0.1%by weight) of other ingredients, provided that any additional ingredients do not affect the essential properties of the composition. When we use the term “consisting of” or “consists of” , we mean that the composition being described must contain the listed ingredient (s) only. Whenever we use the term “comprises or consists of” , “consists essentially of” is also included, even if not explicitly mentioned.
[0037] It is also intended that the terms “comprise” or “comprises” or “comprising” may be replaced with “consist” or “consisting” or “consisting” throughout the application.
[0038] The cosmetic composition of the invention comprises a cosmetic active ingredient and an oily cosmetic base. In other words, the present invention provides an oily cosmetic composition.
[0039] The cosmetic composition may essentially consist of or consist of the cosmetic active ingredient and the oily cosmetic base.
[0040] The cosmetic active ingredient comprises, essentially consists of or consists of a Bilberry seed extract. Bilberry seed extract is sometimes also called “Bilberry seed oil” , “Vaccinium Martyllus seed extract” or “Vaccinium Martyllus seed oil” , and these expressions are used interchangeably throughout this disclosure. The INCI name is VACCINIUM MYRTILLUS SEED OIL.
[0041] Bilberry seed extract typically comprises more than 80 wt%of fatty acids relative to the total weight of the extract. More specifically, it typically contains about 14-24 wt%of oleic acid, about 27-37 wt%of linoleic acid, and about 25-35 wt%of α-linolenic acid. Overall, it typically comprises more than 50 wt%of polyunsaturated fatty acids.
[0042] In an embodiment, the Bilberry seed extract is a supercritical CO2 extract. In other words, the Bilberry seed extract may be obtained by extraction of Bilberry seeds with supercritical CO2.
[0043] Alternatively or in addition to Bilberry seed extract, the cosmetic active ingredient used in the cosmetic composition of the invention may also comprise, essentially consist of or consist of one or more of the oily components of Bilberry seed extract, such as oleic acid, linoleic acid, α-linolenic acid, and mixtures thereof. In particular, the cosmetic active ingredient used in the cosmetic composition of the invention may comprise about 14-24 wt%of oleic acid, about 27-37 wt%of linoleic acid, and about 25-35 wt%of α-linolenic acid, irrespective of the source.
[0044] The oily cosmetic base comprises or consists of an emollient, an emulsifier, or a mixture of one or more emollients and one or more emulsifiers.
[0045] Optionally, the oily cosmetic base may comprise additional components, for example an antioxidant and / or a UV filter.
[0046] The one or more emollients are selected from the group consisting of a polar ester emollient, a polar ether emollient, a polar alcohol emollient, and a mixture thereof. Thus, the cosmetic composition of the invention may comprise or consist of a single polar emollient, or a mixture of several polar emollients, or a mixture of one or more polar emollients with one or more emulsifiers as defined in the claims.
[0047] Emollients are commonly used in personal care formulations. The word emollient is derived from the Latin word “mollis” or “molle” , which means soft, pliable, and supple. Emollients are normally defined as ingredients that impart a smooth, soft, or lubricious feeling. A range of chemical structures is generally known for emollients, such as esters, fatty alcohols, fatty acids, ethers, silicones, and hydrocarbons. However, in the context of the present invention, only polar ester emollients, polar ether emollients, and polar alcohol emollients have been found to be useful.
[0048] “Polarity” refers to the physical properties of compounds, and the polarity of bonds is caused due to the interaction of the bonds between molecules and atoms with different electronegativities. Essentially, polarity comes from the unevenness of the net charge distribution. The greater the unevenness, the stronger the polarity, while there is no polarity when the distribution is completely uniform. Dipole moment is the most commonly used indicator to measure the polarity of molecules; and a polar molecule has an overall dipole moment, caused by the different electronegativities of the atoms present in the molecule. Polar solvents are better at dissolving polar substances, and nonpolar solvents are better at dissolving nonpolar substances.
[0049] By “ester emollient” , it is meant that the emollient contains one or more ester moieties.
[0050] By “ether emollient” , it is meant that the emollient contains one or more ether moieties.
[0051] By “alcohol emollient” , it is meant that the emollient contains one or more alcohol moieties.
[0052] The polar emollient may also contain more than one of these functional groups, for example an ester and an ether group, or an ester and an alcohol group, or an ether and an alcohol group, or all three of them. In each case, they may also contain more than one functional group of the respective types.
[0053] The one or more emulsifiers are selected from the emulsifiers (a) through (h) as defined above.
[0054] An emulsifier or emulsifying agent is a compound or substance that acts as a stabilizer for emulsions, preventing liquids that ordinarily don't mix from separating. The word comes from the Latin word meaning "to milk, " in reference to milk as an emulsion of water and fat. Another word for an emulsifier is an emulgent.
[0055] According to (a) , the emulsifier is a dipentaerythrityl fatty acid ester consisting of a dipentaerythrityl moiety, to which 3-6 C18 fatty acid moieties are covalently attached. Dipentaerythritol (2, 2, 2’, 2’-tetrakis (hydroxymethyl) -3, 3’-oxydipropan-1-ol) has the following chemical structure:
[0056] In the dipentaerythrityl fatty acid esters used in the present invention, three, four, five or six of the alcohol groups of dipentaerythritol have been derivatized to form an ester moiety with a C18 fatty acid.
[0057] As used throughout this disclosure, the term “C18 fatty acid” refers to a carboxylic acid containing a total of 18 carbon atoms. The C18 fatty acid can be saturated or unsaturated, i.e. it may comprise 0 (saturated) , 1, 2, 3 or 4 carbon-carbon double bonds (unsaturated) , and the carbon-carbon double bonds, if present, may be independently from one another E or Z. Furthermore, the C18 fatty acid may be linear or branched, and it may optionally contain one or more hydroxy (-OH) substituent (s) attached to one of the carbon atoms. If more than one C18 fatty acid is present in a molecule, then these C18 fatty acids may be all the same or there may be two, three, four, five, six, seven, eight, nine or ten different C18 fatty acids; preferably, the C18 fatty acids within one molecule are all the same.
[0058] Examples of C18 fatty acids that may be used in the embodiments of the present invention include stearic acid, isostearic acid, oleic acid, elaidic acid, vaccenic acid, linoleic acid, linolelaidic acid, α-linolenic acid, γ-linolenic acid, stearidonic acid, and / or hydroxystearic acid. Preferred C18 fatty acids include stearic acid, isostearic acid, hydroxystearic acid, oleic acid, linoleic acid, and / or α-linolenic acid.
[0059] The C18 fatty acids used in the invention may also form part of an oil, for example olive oil, pumpkin seed oil, grape seed oil, almond oil, wheat germ oil, rosa rubiginosa seed oil, apricot kernel oil, or avocado oil.
[0060] According to (b) , the emulsifier is a fatty acid ester of a polyglycerol consisting of a polyglyceryl backbone with 2-10 polyglyceryl units, to which polyglyceryl backbone 1-10 fatty acid moieties are covalently attached, wherein the fatty acid moieties are C18 fatty acid moieties, and wherein the emulsifier has an HLB value of about 4 to about 8. These polyglycerol fatty acid esters have the following general chemical structure:
[0061] wherein n is selected from the group consisting of 1, 2, 3, 4, 5, 6, 7, 8, and 9; each R is independently from the other R groups either H or C=OR’, and R’ is the C18 carbon chain of the C18 fatty acid (s) .
[0062] The hydrophilic–lipophilic balance (HLB) of an emulsifier is a measure of its degree of hydrophilicity or lipophilicity, determined by calculating percentages of molecular weights for the hydrophilic and lipophilic portions of the surfactant molecule, as described by Griffin in 1949 and 1954. In other words, the HLB value is an indication of the balance of the size and strength of the hydrophilic and lipophilic moieties of a molecule.
[0063] Griffin's method for non-ionic surfactants as described in 1954 (Griffin, William C. (1954) , "Calculation of HLB Values of Non-Ionic Surfactants" , Journal of the Society of Cosmetic Chemists, 5 (4) : 249–5) works as follows:
[0064] HLB = 20 *Mh / M
[0065] where MHLB is the molecular mass of the hydrophilic portion of the molecule, and M is the molecular mass of the whole molecule, giving a result on a scale of 0 to 20. An HLB value of 0 corresponds to a completely lipophilic (i.e. hydrophobic) molecule, and a value of 20 corresponds to a completely hydrophilic (i.e. lipophobic) molecule.
[0066] The HLB values for certain emulsifiers mentioned in this disclosure can be found below in the example section.
[0067] According to (c) , the emulsifier is a fatty acid ester of a polyethylene glycol (PEG) consisting of a polyethylene glycol backbone with 4-10 polyethylene glycol units, to which polyethylene glycol backbone one or two fatty acid moieties are covalently attached, wherein the fatty acid moieties are C18 fatty acid moieties. These PEG fatty acid esters have the following general chemical structure:
[0068] wherein m is selected from the group consisting of 4, 5, 6, 7, 8, 9, and 10; and R1 and R2 are independently from each other either H or C=OR’, R’ being the C18 carbon chain of the C18 fatty acid (s) .
[0069] According to (d) , the emulsifier is a polysorbate fatty acid ester consisting of an ethoxylated sorbitan backbone with 20 oxyethylene units, to which ethoxylated sorbitan backbone a C18 fatty acid moiety is covalently attached. These polysorbate fatty acid esters have the following general chemical structure:
[0070] wherein a, b, c and d are integers and the sum of a+b+c+d is 20; and one of R3, R4, R5 and R6 is C=OR’, R’ being the C18 carbon chain of the C18 fatty acid (s) , and the other three are H. Preferably, R6 is C=OR’.
[0071] According to (e) , the emulsifier is a sorbitan fatty acid ester consisting of a sorbitan moiety, to which one or two C18 fatty acid moieties are covalently attached. These sorbitan fatty acid esters have the following general chemical structure:
[0072] wherein R7 is C=OR’, R’ being the C18 carbon chain of the C18 fatty acid.
[0073] According to (f) , the emulsifier is trilaureth-4 phosphate. Trilaureth-4 phosphate has the following chemical structure:
[0074] wherein e, f, and g are integers and the sum of e+f+g is 4.
[0075] According to (g) , the emulsifier is laureth-4. Laureth-4 has the following chemical structure:
[0076] According to (h) , the emulsifier is a mixture of one or more of the emulsifiers (a) through (g) . Thus, the cosmetic composition of the invention may comprise more than one emulsifier from one of groups (a) through (g) , or one emulsifier each from more than one of groups (a) through (g) , or it may also comprise one emulsifier each from one or more of groups (a) through (g) and more than one emulsifier from one or more of groups (a) through (g) or more than one emulsifier from more than one of groups (a) through (g) .
[0077] Surprisingly, it has been found that by including one or more of the above emollients and / or emulsifiers in the cosmetic composition, it is possible to obtain a homogenous formulation of Bilberry seed extract and to avoid clouding and precipitation.
[0078] In an embodiment, the cosmetic composition of the invention comprises the Bilberry seed extract in a concentration of about 0.01 wt%to about 10 wt%, more preferably in a concentration of about 0.1 wt%to about 5 wt%, still more preferably in a concentration of about 1 wt%to about 3 wt%; and most preferably in a concentration of about 2 wt%. These concentrations are sufficiently high to ensure the desired cosmetic activity, while avoiding drawbacks such as reduced stability, discolouration, interference with other ingredients, higher costs, and unwanted side-effects upon application.
[0079] Throughout this disclosure, concentrations are usually indicated in weight percent (wt%) relative to the total weight of the cosmetic composition, unless otherwise indicated.
[0080] The term “about” as used herein, e.g. when referring to a measurable value (such as an amount of weight of a particular component in the composition) , refers to variations of ±20%, ±10%, ±5%, ±1%, ±0.5%, or particularly, ±0.1%, of the specified amount.
[0081] In order to achieve optimal solubilization of the Bilberry seed extract, it may be beneficial to select a certain ratio between the Bilberry seed extract and the emollient (s) and / or emulsifier (s) .
[0082] In an embodiment, the mass ratio of the Bilberry seed extract to the one or more emollients is about 1: 1 to about 1: 99, more preferably about 1: 2 to about 1: 50, still more preferably about 1: 5 to about 1: 30, and most preferably about 1: 10 to about 1: 20.
[0083] In an embodiment, the mass ratio of the Bilberry seed extract to the one or more emulsifiers is about 20: 1 to about 1: 10, more preferably about 15: 1 to about 1: 5, still more preferably about 10: 1 to about 1: 1, and most preferably about 5: 1 to about 2: 1.
[0084] It has been found that these ratios are particularly advantageous.
[0085] The skilled person will appreciate that, depending on the specific emollient (s) and / or emulsifier (s) used, these ratios may slightly vary. Also, if combinations are used, the ratios may also have to be adjusted.
[0086] Advantageously, the emollient (s) and / or emulsifier (s) is / are uniform and liquid or paste-like at room temperature and standard pressure.
[0087] In an embodiment, the one or more emollients are selected from the group consisting of octyldodecyl lactate, dimethyl isosorbide, isostearyl isostearate, isononyl isononanoate, dicapryl carbonate, neopentyl glycol dicaprate, triethylhexanoin, diethylhexyl carbonate, hexyldecanol, octyldodecanol, and mixtures thereof. These emollients have been found to be particularly efficient for the present purpose.
[0088] In an embodiment, the one or more emulsifiers are selected from the group consisting of dipentaerythrityl tri-polyhydroxystearate, dipentaerythrityl tetraisostearate, dipentaerythrityl tetrahydroxystearate, dipentaerythrityl pentaisostearate, dipentaerythrityl hexaisostearate, dipentaerythrityl hexahydroxystearate, polyglyceryl-4 isostearate, polyglyceryl-5 trioleate, polyglyceryl-10 nonaisostearate, polyglyceryl-10 decaisostearate, olive oil PEG-7 ester, polysorbate 60, polysorbate 80, sorbitan stearate, sorbitan distearate, sorbitan sesquistearate, trilaureth-4 phosphate, laureth-4, and mixtures thereof. Dipentaerythrityl tripolyhydroxystearate and polyglyceryl-5 trioleate were found to be particularly useful for forming a uniform formulation of Bilberry seed extract.
[0089] Alternatively or in addition, in the above emulsifiers, one or more of the C18 fatty acid substituents may also be replaced by another C18 fatty acid substituent.
[0090] As is well-known to the skilled person, a sesquistearate is a mixture of a monostearate and a distearate; polysorbate 60 corresponds to polyoxyethylene (20) sorbitan monostearate or 60;and polysorbate 80 corresponds to polyoxyethylene (20) sorbitan monooleate or 80; for example, and dipentaerythrityl tri-polyhydroxystearate under the tradename SALACOS WO-6 (Kowa Europe GmbH) ; olive oil typically comprises oleic acid, linoleic acid, palmitic acid, stearic acid, α-linolenic acid.
[0091] Alternatives to olive oil PEG-7 ester include, without being limited to, triisostearin PEG-6 ester, olive oil PEG-6 ester and olive oil PEG-8 ester; as well as the PEG-6, PEG-7 and PEG-8 esters of pumpkin seed oil, grape seed oil, almond or sweet almond oil, wheat germ oil, rosa rubiginosa seed oil, apricot kernel oil, and avocado oil.
[0092] Preferably, the cosmetic composition of the invention is uniform, in particular at room temperature and standard pressure. More preferably, it is also uniform at reduced pressure and / or after having been frozen and thawed.
[0093] In an embodiment, cosmetic composition of the invention is liquid or paste-like, in particular at room temperature and standard pressure. More preferably, it is also liquid or paste-like at reduced pressure (e.g. at about 4 ℃) and / or after having been frozen and thawed.
[0094] In an embodiment, the cosmetic composition of the invention is a skin care composition. It may be formulated in any form useful for application to the skin topically or by transdermal application. Such formulations include, but are not restricted to, creams, multiple emulsions, such as and not restricted to, oil and / or silicone in water emulsions, water-in-oil and / or silicone emulsions, water / oil / water or water / silicone / water type emulsions, and oil / water / oil or silicone / water / silicone type emulsions, micro-emulsions, emulsions and / or solutions, liquid crystals, anhydrous compositions, dispersions, oils, milks, butters, balsams, foams, lotions, gels, creams, solutions, liniments, sera, face masks, serums, ointments, mousses, pomades, and pastes, including leave-on and rinse-off formulations.
[0095] The cosmetic composition of the invention may optionally one or more additional ingredients commonly used in cosmetic compositions, for example stabilizers, antioxidants, moisturizers, humectants, skin care agents, conditioning agents, colorants, skin tone agents, skin anti-aging agents, anti-inflammatory agents, antimicrobials, sunscreen agents, self-tanning agents, fragrance, combinations of these and the like.
[0096] In an embodiment, the cosmetic composition of the invention further comprises capric / caprylic triglyceride in a concentration of about 0.01 wt%to about 98 wt%, more preferably in a concentration of about 1 wt%to about 95 wt%, still more preferably in a concentration of about 20 wt%to about 90 wt%, and most preferably in a concentration of about 70 wt%. As is well-known in the art, capric / caprylic triglyceride corresponds to a mixture of capric triglyceride and caprylic triglyceride.
[0097] In an embodiment, the cosmetic composition of the invention further comprises an antioxidant, more preferably a natural antioxidant, in a concentration of about 0.001 wt%to about 10 wt%, more preferably of about 0.05 wt%to about 1 wt%, still more preferably of about 0.1 wt%to about 0.5 wt%, and most preferably of about 0.3%.
[0098] In an embodiment, the antioxidant is selected from the group consisting of dimethylmethoxy chromanol, tocopheryl acetate (vitamin E acetate) , pentaerythritol tetrakis (3, 5-di-tert-butyl-4-hydroxyhydrocinnamate) , octadecyl di-tert-butyl-4-hydroxyhydrocinnamate, butylated hydroxytoluene (BHT) , Rosmarinus officinalis (rosemary) leaf extract. In particular, dimethylmethoxy chromanol was found to be highly effective.
[0099] The cosmetic composition of the invention may also comprise further cosmetic actives.
[0100] In an embodiment, the cosmetic composition of the invention further comprises comprising one or more components selected from the group consisting of squalene, bisabolol, Simmondsia chinensis (Jojoba) seed oil, and mixtures thereof.
[0101] In an embodiment, the cosmetic composition of the invention is a lipophilic composition.
[0102] In an embodiment, the cosmetic composition of the invention comprises less than 70 wt%of water, more preferably less than 30 wt%water, still more preferably less than 10 wt%of water, and most preferably no water or essentially no water.
[0103] In order to achieve optimal results, a suitable concentration of the emollient (s) and / or emulsifier (s) should be selected. As the skilled person will appreciate, the concentration will typically be higher if only one emollient or one emulsifier is used, whereas a lower concentration each will be suitable if several emollients and / or emulsifiers are used.
[0104] For example, suitable concentrations if only one emollient or one emulsifier are used may be as described in the embodiments below:
[0105] In an embodiment, the cosmetic composition of the invention comprises octyldodecyl lactate at a concentration of about 1 wt%to about 99.9 wt%, more preferably about 10 wt%to about 99 wt%, still more preferably about 50 wt%to about 98 wt%, and most preferably about 97.7 wt%.
[0106] In an embodiment, the cosmetic composition of the invention comprises dimethyl isosorbide at a concentration of about 1 wt%to about 99.9 wt%, more preferably about 10 wt%to about 99 wt%, still more preferably about 50 wt%to about 98 wt%, and most preferably about 97.7 wt%.
[0107] In an embodiment, the cosmetic composition of the invention comprises isostearyl isostearate at a concentration of about 1 wt%to about 99.9 wt%, more preferably about 10 wt%to about 90 wt%, still more preferably about 20 wt%to about 50 wt%, and most preferably about 32 wt%.
[0108] In an embodiment, the cosmetic composition of the invention comprises isononyl isononanoate at a concentration of about 0.1 wt%to about 20 wt%, more preferably about 0.5 wt%to about 10 wt%, still more preferably about 1 wt%to about 5 wt%, and most preferably about 2 wt%.
[0109] In an embodiment, the cosmetic composition of the invention comprises dicapryl carbonate at a concentration of about 0.1 wt%to about 20 wt%, more preferably about 0.5 wt%to about 10 wt%, still more preferably about 1 wt%to about 5 wt%, and most preferably about 2 wt%.
[0110] In an embodiment, the cosmetic composition of the invention comprises neopentyl glycol dicaprate at a concentration of about 0.1 wt%to about 20 wt%, more preferably about 0.5 wt%to about 10 wt%, still more preferably about 1 wt%to about 5 wt%, and most preferably about 2 wt%.
[0111] In an embodiment, the cosmetic composition of the invention comprises triethylhexanoin at a concentration of about 0.1 wt%to about 20 wt%, more preferably about 0.5 wt%to about 10 wt%, still more preferably about 1 wt%to about 5 wt%, and most preferably about 2 wt%.
[0112] In an embodiment, the cosmetic composition of the invention comprises diethylhexyl carbonate at a concentration of about 0.1 wt%to about 20 wt%, more preferably about 0.5 wt%to about 10 wt%, still more preferably about 1 wt%to about 5 wt%, and most preferably about 2 wt%.
[0113] In an embodiment, the cosmetic composition of the invention comprises hexyldecanol at a concentration of about 0.1 wt%to about 50 wt%, more preferably about 0.5 wt%to about 20 wt%, still more preferably about 1 wt%to about 5 wt%, and most preferably about 2.5 wt%.
[0114] In an embodiment, the cosmetic composition of the invention comprises octyldodecanol at a concentration of about 1 wt%to about 99.9 wt%, more preferably about 10 wt%to about 99 wt%, still more preferably about 50 wt%to about 98 wt%, and most preferably about 97.7 wt%.
[0115] In an embodiment, the cosmetic composition of the invention comprises dipentaerythrityl tri-polyhydroxystearate at a concentration of about 0.1 wt%to about 20 wt%, more preferably about 0.5 wt%to about 10 wt%, still more preferably about 1 wt%to about 5 wt%, and most preferably about 2 wt%.
[0116] In an embodiment, the cosmetic composition of the invention comprises dipentaerythrityl tetraisostearate at a concentration of about 0.1 wt%to about 10 wt%, more preferably about 0.2 wt%to about 5 wt%, still more preferably about 0.3 wt%to about 1 wt%, and most preferably about 0.5 wt%.
[0117] In an embodiment, the cosmetic composition of the invention dipentaerythrityl tetrahydroxystearate at a concentration of about 0.1 wt%to about 10 wt%, more preferably about 0.2 wt%to about 5 wt%, still more preferably about 0.3 wt%to about 1 wt%, and most preferably about 0.5 wt%.
[0118] In an embodiment, the cosmetic composition of the invention comprises dipentaerythrityl pentaisostearate at a concentration of about 0.1 wt%to about 10 wt%, more preferably about 0.2 wt%to about 5 wt%, still more preferably about 0.3 wt%to about 1 wt%, and most preferably about 0.5 wt%.
[0119] In an embodiment, the cosmetic composition of the invention comprises dipentaerythrityl hexaisostearate at a concentration of about 0.1 wt%to about 10 wt%, more preferably about 0.2 wt%to about 5 wt%, still more preferably about 0.3 wt%to about 1 wt%, and most preferably about 0.5 wt%.
[0120] In an embodiment, the cosmetic composition of the invention comprises dipentaerythrityl hexahydroxystearate at a concentration of about 0.1 wt%to about 10 wt%, more preferably about 0.2 wt%to about 5 wt%, still more preferably about 0.3 wt%to about 1 wt%, and most preferably about 0.5 wt%.
[0121] In an embodiment, the cosmetic composition of the invention comprises polyglyceryl-4 isostearate at a concentration of about 0.1 wt%to about 5 wt%, more preferably about 0.2 wt%to about 1 wt%, still more preferably about 0.25 wt%to about 0.75 wt%, and most preferably about 0.5 wt%.
[0122] In an embodiment, the cosmetic composition of the invention comprises polyglyceryl-5 trioleate at a concentration of about 0.1 wt%to about 8 wt%, more preferably about 0.15 wt%to about 1 wt%, still more preferably about 0.2 wt%to about 0.5 wt%, and most preferably about 0.25 wt%.
[0123] In an embodiment, the cosmetic composition of the invention comprises polyglyceryl-10 nonaisostearate at a concentration of about 0.1 wt%to about 8 wt%, more preferably about 0.15 wt%to about 1 wt%, still more preferably about 0.2 wt%to about 0.5 wt%, and most preferably about 0.25 wt%.
[0124] In an embodiment, the cosmetic composition of the invention comprises polyglyceryl-10 decaisostearate at a concentration of about 0.1 wt%to about 8 wt%, more preferably about 0.15 wt%to about 1 wt%, still more preferably about 0.2 wt%to about 0.5 wt%, and most preferably about 0.25 wt%.
[0125] In an embodiment, the cosmetic composition of the invention comprises olive oil PEG-7 ester at a concentration of about 0.3 wt%to about 1 wt%, more preferably about 0.4 wt%to about 0.9 wt%, still more preferably about 0.5 wt%to about 0.8 wt%, and most preferably about 0.7 wt%.
[0126] In an embodiment, the cosmetic composition of the invention comprises polysorbate 60 at a concentration of about 0.01 wt%to about 0.2 wt%, more preferably about 0.05 wt%to about 0.15 wt%, still more preferably about 0.075 wt%to about 0.125 wt%, and most preferably about 0.1 wt%.
[0127] In an embodiment, the cosmetic composition of the invention comprises polysorbate 80 at a concentration of about 0.01 wt%to about 0.2 wt%, more preferably about 0.05 wt%to about 0.15 wt%, still more preferably about 0.075 wt%to about 0.125 wt%, and most preferably about 0.1 wt%.
[0128] In an embodiment, the cosmetic composition of the invention comprises sorbitan stearate at a concentration of about 0.1 wt%to about 1.25 wt%, more preferably about 0.2 wt%to about 1 wt%, still more preferably about 0.25 wt%to about 0.75 wt%, and most preferably about 0.5 wt%.
[0129] In an embodiment, the cosmetic composition of the invention comprises sorbitan distearate at a concentration of about 0.1 wt%to about 1.25 wt%, more preferably about 0.2 wt%to about 1 wt%, still more preferably about 0.25 wt%to about 0.75 wt%, and most preferably about 0.5 wt%.
[0130] In an embodiment, the cosmetic composition of the invention comprises sorbitan sesquistearate at a concentration of about 0.1 wt%to about 1.25 wt%, more preferably about 0.2 wt%to about 1 wt%, still more preferably about 0.25 wt%to about 0.75 wt%, and most preferably about 0.5 wt%.
[0131] In an embodiment, the cosmetic composition of the invention comprises trilaureth-4 phosphate at a concentration of about 0.1 wt%to about 10 wt%, more preferably about 0.2 wt%to about 5 wt%, still more preferably about 0.5 wt%to about 1 wt%, and most preferably about 0.75 wt%.
[0132] In an embodiment, the cosmetic composition of the invention comprises laureth-4 at a concentration of about 0.1 wt%to about 10 wt%, more preferably about 0.2 wt%to about 5 wt%, still more preferably about 0.5 wt%to about 1 wt%, and most preferably about 0.75 wt%.
[0133] In an embodiment, the cosmetic composition of the invention comprises squalene at a concentration of about 0.01 wt%to about 50 wt%, more preferably about 0.1 wt%to about 40 wt%, still more preferably about 10 wt%to about 30 wt%, and most preferably about 20 wt%.
[0134] In an embodiment, the cosmetic composition of the invention comprises bisabolol at a concentration of about 0.000001 wt%to about 5 wt%, more preferably about 0.01 wt%to about 1 wt%, still more preferably about 0.1 wt%to about 0.5 wt%, and most preferably about 0.2 wt%.
[0135] Typically, if several emollients are used, their respective concentrations will be adapted such that the sum of the concentrations corresponds to those mentioned above. Similarly, if several emulsifiers are used, their respective concentrations will be adapted such that the sum of the concentrations corresponds to those mentioned above. Analogously, this also applies to mixtures of one or more emollient (s) with one or more emulsifier (s) .
[0136] In an embodiment, the cosmetic composition of the invention comprises Simmondsia chinensis (Jojoba) seed oil at a concentration of about 1 wt%to about 98 wt%, more preferably about 10 wt%to about 90 wt%, still more preferably about 15 wt%to about 60 wt%, and most preferably about 20 wt%to about 40 wt%.
[0137] In an embodiment, the cosmetic composition of the invention comprises dimethylmethoxy chromanol at a concentration of about 0.001 wt%to about 5 wt%, more preferably about 0.01 wt%to about 2 wt%, still more preferably about 0.03 wt%to about 1 wt%, and most preferably about 0.05 wt%to about 0.1 wt%.
[0138] In a further aspect, the present invention also provides a method of preparing the cosmetic composition of the invention. This method comprises the steps of:
[0139] (i) heating the emollient and / or emulsifier to a temperature of between about 50 ℃ and about 80 ℃;
[0140] (ii) adding the cosmetic active ingredient; and
[0141] (iii) mixing to obtain the cosmetic composition.
[0142] In an embodiment, one or more further ingredients are added. Preferably, these further ingredients are added between steps (i) and (ii) .
[0143] In an embodiment, one or more antioxidants are added. Preferably, the antioxidant (s) are added in step (ii) . Alternatively, it / they may also be added between steps (i) and (ii) .
[0144] Preferably, excessive heating of the Bilberry seed extract should be avoided. For example, in an embodiment, the Bilberry seed extract is heated for no longer than 10 min, more preferably for no longer than 5 min.
[0145] Bilberry seed extracts has a number of advantageous cosmetic benefits, as is shown in the examples below.
[0146] The present invention also provides a method of preventing skin photo-ageing by applying the cosmetic composition of the invention to human skin.
[0147] The present invention also provides a method of stimulating keratinocytes proliferation by applying the cosmetic composition of the invention to human skin.
[0148] The present invention also provides a method of improving skin barrier by applying the cosmetic composition of the invention to human skin.
[0149] The present invention also provides a method of alleviating skin erythema by applying the cosmetic composition of the invention to human skin.
[0150] The present invention also provides a method of alleviating itching symptoms by applying the cosmetic composition of the invention to human skin.
[0151] The present invention also relates to the use of the cosmetic composition of the invention for preventing skin photo-ageing.
[0152] The present invention also relates to the use of the cosmetic composition of the invention for stimulating keratinocytes proliferation.
[0153] The present invention also relates to the use of the cosmetic composition of the invention for improving skin barrier.
[0154] The present invention also relates to the use of the cosmetic composition of the invention for alleviating skin erythema.
[0155] The present invention also relates to the use of the cosmetic composition of the invention for alleviating itching symptoms.Brief description of drawings:
[0156] Figure 1 shows entries #1 through #10 of Example 2;
[0157] Figure 2 shows entries #11 through #20 of Example 2;
[0158] Figure 3 shows entries #21 through #30 of Example 2;
[0159] Figure 4 shows entries #31 through #35 of Example 2;
[0160] Figure 5 shows Base FT and Base RT of Example 2;
[0161] Figure 6 shows the cosmetic composition of example 4;
[0162] Figure 7 shows the composition D1 of comparative example 5; and
[0163] Figure 8 shows the composition D2 of comparative example 5.
[0164] The present invention is further illustrated by means of the following non-limiting examples:
[0165] Example 1: General Testing Method
[0166] In order to assess the suitability of a chemical substance, in particular of an emollient and / or emulsifier, for solubilizing Bilberry seed extract and for providing a uniform cosmetic composition, the following general testing method was applied, while adapting the respective amounts of the ingredients depending on the amounts to be tested:
[0167] The emollient and / or emulsifier (x wt%) and CAPRYLIC / CAPRIC TRIGLYCERIDE ( (97.7-x) wt%) were placed in a vial and heated to about 60-70 ℃. 2 wt%of Bilberry seed extract and optionally 0.3 wt%of an antioxidant (usually tocopheryl acetate) were pre-mixed and the resulting mixture was added to the heated emollient and / or emulsifier. After stirring for another 5-7 min at about 60-70 ℃, the resulting composition was cooled to room temperature and then stored at -20 ℃ ± 2 ℃for 24 hours. Subsequently, the vial with the composition was stored in a water bath at 25 ℃ ±0.5 ℃ for another 24 hours.
[0168] The composition was then visually inspected for uniformity / clouding / precipitation.
[0169] Example 2: Test Results
[0170] The results of the visual testing according to the general procedure described in example 1 are summarized in the table below. Each of these samples consisted of 2 wt%of Bilberry seed extract, 0.3 wt%of tocopheryl acetate, the indicated concentrations of the emollient / emulsifier, and q. s. p. 100 wt%of capric / caprylic triglyceride.
[0171] In addition, where an entry number (e.g. #14) is provided, there is also a photograph of the respective sample provided in the Figures. More specifically:
[0172] Figure 1 shows entries #1 through #10;
[0173] Figure 2 shows entries #11 through #20;
[0174] Figure 3 shows entries #21 through #30;
[0175] Figure 4 shows entries #31 through #35; and
[0176] Figure 5 shows Base FT and Base RT.
[0177] As can be seen from the photographs of entries #1 through #35, some of these samples were completely uniform while others were cloudy or even contained a precipitate.
[0178] For Base FT and Base RT, 2 wt%of Bilberry seed extract and 0.3 wt%of tocopheryl acetate were mixed with 97.7 wt%of capric / caprylic triglyceride. Base RT was then kept at room temperature (25 ℃) , while Base FT was stored in a freezer (-20 ℃) for 24 hours and then in a water bath at 25 ℃ for another 24 hours before taking the photo. That same freezing-thawing procedure was also conducted for the other samples marked with FT.
[0179] Example 3: Evaluation of MMP1 Release Activity
[0180] The aim of this study was to evaluate the protective effect of Bilberry seed oil against photo-ageing.
[0181] For this purpose, MMP-1 release was assessed after 24 hours of treatment with the Bilberry seed oil followed by an irradiation with UVA.
[0182] Cell culture and treatment
[0183] The cell culture was done on primary cells isolated from fresh biopsies. Normal Human Dermal Fibroblasts (NHDFs) were seeded in a 12-wells plate at 50’000 cells per well, in triplicate.
[0184] After 48 hours of incubation in complete medium (DMEM medium, Gibco) , supplemented with 10%FCS (Biowest) and 1%of antibiotics (Sigma-Aldrich) at 37 ℃ with 5%CO2, the cells were rinsed twice with DMEM and incubated for at least 6 hours in basal medium (DMEM and 1%of antibiotics) . At the end of the incubation, the cells were treated overnight with the Bilberry seed oil (0.01 wt%in basal medium with 0.09 wt%of DMSO) at 37 ℃ with 5%CO2.
[0185] Skin cells untreated and cultivated with medium were used as negative control.
[0186] The next day, the cells were rinsed twice with PBS (Gibco) and treated with HBSS (Gibco) . Then, the cells were irradiated at 10 J / cm2 UVA and incubated for 72 hours in basal medium at 37 ℃with 5%CO2.
[0187] Skin cells untreated but irradiated were treated with HBSS and left at room temperature for the period of irradiation.
[0188] After 72 hours, the cells’ supernatants were collected and stored at -20 ℃ until MMP-1 quantification by ELISA assay. Meanwhile, cells were stained with Crystal Violet solution for assessing viability of the cultured cells.
[0189] The assay was done in triplicate.
[0190] Determination of cell viability
[0191] Cells were stained with the Crystal Violet solution (Sigma) after being attached to the well with methanol. The wells were washed with distilled water three times and the stain was solubilized in 10%acetic acid (Sigma) . Absorbance of each sample was then measured with a spectrophotometer.
[0192] Quantification of MMP-1 release
[0193] The MMP-1 release was quantified using an ELISA Kit (Kit Human Pro-MMP1, R&D systems) following the supplier’s protocol. Absorbance of each sample (including the reference scale) was measured with a spectrophotometer and analysed according to the My Assays website. The obtained concentration values were normalized taking into account the cell viability.
[0194] Statistical analysis
[0195] A Shapiro-Wilk normality test was performed to evaluate whether the data followed the Gaussian Law. The results did follow the Gaussian Law, but replicates were below 8. As a consequence, a non-parametric statistical analysis was performed by Kruskal-Wallis ANOVA followed by Mann Whitney U test.
[0196] Results
[0197] The irradiation of the fibroblast cells significantly increased the percentage of MMP-1 release by 99%(p<0.05) in comparison to the non-irradiated fibroblast cells.
[0198] The cells treated with the Bilberry seed extract at 0.01%showed a significantly lower MMP-1 release (-42% (p<0.1) compared to the untreated irradiated cells) .
[0199] Thus, treatment with Bilberry seed extract led to a significant inhibition of the MMP-1 release, confirming that the Bilberry seed extract is able to prevent photo-ageing.
[0200] Example 4: Cosmetic Composition
[0201] The following is an example of a cosmetic composition of the present invention:
[0202] C13-16 ISOPARAFFIN (e.g. NeossanceTM Hemisqualane from Givaudan) has a low polarity and was found to improve the sensory characteristics of the cosmetic composition, such as e.g. nice haptics when applied to skin, easy absorption, less greasy feeling, and soft residue.
[0203] Stearic acid was also found to improve the sensory characteristics of the cosmetic composition.
[0204] Figure 6 shows the cosmetic composition of example 4 after three freeze-thaw cycles. As can be seen from this photograph, the cosmetic composition is uniform.
[0205] Example 5: Comparative Examples
[0206] Cosmetic compositions comprising a Bilberry seed extract have been described in the past. However, if oily bases are used, these will typically contain a precipitate or be cloudy or turbid or otherwise inhomogeneous.
[0207] For example, CN 109771338 (D1) discloses in example 1 a composition comprising 0.1%Bilberry seed oil, 0.2%bisabolol, 0.1%capric / caprylic triglyceride, 2%polyglyceryl-2 dipolyhydroxystearate, 0.2%polyglyceryl-3-diisostearate, 0.3%tocopheryl acetate, 1.8%cyclopentasiloxane, 1.5%cyclohexasiloxane, and 3%ethylhexyl palmitate.
[0208] And Tadic et al., “Old Plant, New Possibilities: Wild Bilberry (Vaccinium myrtillus L., Ericaceae) in Topical Skin Preparation” (D2) discloses in table 1 a composition comprising 5.50 wt%capric / caprylic triglycerides 8.50 wt%glyceryl stearate and ceteareth-20 and ceteareth-12 and cetearyl alcohol and cetyl palmitate 0.75 wt%cetyl alcohol, 0.75 wt%stearyl alcohol, 2.00 wt%glycerin, 0.50 wt%sodium benzoate, 6.00 wt%Vaccinium myrtillus L., seed oil (wild bilberry oil) , 6.00 wt%Vaccinium myrtillus L. leaves maceration with 70% (v / v) ethanol (wild bilberry extract) , and q.s.p. 100 wt%distilled water.
[0209] For comparison, the present inventors have tested the compositions disclosed in these two documents.
[0210] The composition of D1 was either kept at room temperature overnight (sample “RT” ) , or subjected to a freeze-thaw cycle by keeping it at -20 ℃ overnight and then letting it warm to room temperature (sample “FT” ) . As can be seen from Figure 7, both samples were turbid.
[0211] The composition of D2 consists of an oily phase (capric / caprylic triglycerides, glyceryl stearate and ceteareth-20 and ceteareth-12 and cetearyl alcohol and cetyl palmitate, cetyl alcohol, stearyl alcohol, and Vaccinium myrtillus L. seed oil) and an aqueous phase (glycerin, sodium benzoate, Vaccinium myrtillus L. leaves maceration with 70% (v / v) ethanol, and water) . Vaccinium myrtillus L. leaves maceration with 70% (v / v) ethanol was not available to the present inventors; but it is an aqueous extract and was therefore replaced by water.
[0212] First, only the oily phase was investigated. Keeping it overnight at room temperature or preforming a freeze-thaw cycle (-20 ℃ to room temperature) afforded a light green, cloudy solid (RT in Figure 8) . Heating the oily phase to 70-75 ℃ afforded a dark green, clear liquid (70-75 ℃ in Figure 8) . Upon combination of the heated and, thus, liquefied oily phase with the aqueous phase, an opaque, creamy emulsion (Emulsion in Figure 8) was obtained.
[0213] As can be seen from the above and the respective figures, the compositions of the prior art are not clear at room temperature, and may not even be liquid.
Claims
1.Cosmetic composition comprising a cosmetic active ingredient and an oily cosmetic base, wherein the cosmetic active ingredient comprises or consists of a Bilberry seed extract, and wherein the oily cosmetic base comprises or consists of an emollient, an emulsifier, or a mixture of one or more emollients and one or more emulsifiers,wherein the one or more emollients are selected from the group consisting of a polar ester emollient, a polar ether emollient, a polar alcohol emollient, and a mixture thereof, andwherein the one or more emulsifiers are selected from the group consisting of:(a) a dipentaerythrityl fatty acid ester consisting of a dipentaerythrityl moiety, to which 3-6 C18 fatty acid moieties are covalently attached,(b) a fatty acid ester of a polyglycerol consisting of a polyglyceryl backbone with 2-10 polyglyceryl units, to which polyglyceryl backbone 1-10 fatty acid moieties are covalently attached, wherein the fatty acid moieties are C18 fatty acid moieties, and wherein the emulsifier has an HLB value of about 4 to about 8, with the proviso that the emulsifier is not polyglyceryl-2 dipolyhydroxystearate and not polyglyceryl-3 diisostearate,(c) a fatty acid ester of a polyethylene glycol consisting of a polyethylene glycol backbone with 4-10 polyethylene glycol units, to which polyethylene glycol backbone one or two fatty acid moieties are covalently attached, wherein the fatty acid moieties are C18 fatty acid moieties,(d) a polysorbate fatty acid ester consisting of an ethoxylated sorbitan backbone with 20 oxyethylene units, to which ethoxylated sorbitan backbone a C18 fatty acid moiety is covalently attached,(e) a sorbitan fatty acid ester consisting of a sorbitan moiety, to which one or two C18 fatty acid moieties are covalently attached,(f) trilaureth-4 phosphate(g) laureth-4, and(h) a mixture of one or more of the emulsifiers (a) through (g) .2.Cosmetic composition according to claim 1, comprising the Bilberry seed extract in a concentration of about 0.01 wt%to about 10 wt%, more preferably in a concentration of about 0.1 wt%to about 5 wt%, still more preferably in a concentration of about 1 wt%to about 3 wt%; and most preferably in a concentration of about 2 wt%.3.Cosmetic composition according to claim 1 or 2, wherein the mass ratio of the Bilberry seed extract to the one or more emollients is about 1: 1 to about 1: 99, more preferably about 1: 2 to about 1: 50, still more preferably about 1: 5 to about 1: 30, and most preferably about 1: 10 to about 1: 20.4.Cosmetic composition according to claim 1 or 3, wherein the mass ratio of the Bilberry seed extract to the one or more emulsifiers is about 20: 1 to about 1: 10, more preferably about 15: 1 to about 1: 5, still more preferably about 10: 1 to about 1: 1, and most preferably about 5: 1 to about 2: 1.5.Cosmetic composition according to any one of claims 1 to 4, wherein the one or more emollients are selected from the group consisting of octyldodecyl lactate, dimethyl isosorbide, isostearyl isostearate, isononyl isononanoate, dicapryl carbonate, neopentyl glycol dicaprate, triethylhexanoin, diethylhexyl carbonate, hexyldecanol, octyldodecanol, and mixtures thereof; and / or wherein the one or more emulsifiers are selected from the group consisting of dipentaerythrityl tri-polyhydroxystearate, dipentaerythrityl tetraisostearate, dipentaerythrityl tetrahydroxystearate, dipentaerythrityl pentaisostearate, dipentaerythrityl hexaisostearate, dipentaerythrityl hexahydroxystearate, polyglyceryl-4 isostearate, polyglyceryl-5 trioleate, polyglyceryl-10 nonaisostearate, polyglyceryl-10 decaisostearate, olive oil PEG-7 ester, polysorbate 60, polysorbate 80, sorbitan stearate, sorbitan distearate, sorbitan sesquistearate, trilaureth-4 phosphate, laureth-4, and mixtures thereof.6.Cosmetic composition according to any one of claims 1 to 5, wherein the cosmetic composition is uniform.7.Cosmetic composition according to any one of claims 1 to 6, further comprising an antioxidant, more preferably a natural antioxidant, in a concentration of about 0.001 wt%to about 10 wt%, more preferably of about 0.05 wt%to about 1 wt%, still more preferably of about 0.1 wt%to about 0.5 wt%, and most preferably of about 0.3 wt%.8.Cosmetic composition according to claim 7, wherein the antioxidant is selected from the group consisting of dimethylmethoxy chromanol, tocopheryl acetate (vitamin E acetate) , pentaerythritol tetrakis (3, 5-di-tert-butyl-4-hydroxyhydrocinnamate) , octadecyl di-tert-butyl-4-hydroxyhydrocinnamate, butylated hydroxytoluene (BHT) , Rosmarinus officinalis (rosemary) leaf extract.9.Cosmetic composition according to any one of claims 1 to 8, further comprising one or more components selected from the group consisting of squalene, bisabolol, Simmondsia chinensis (Jojoba) seed oil, and mixtures thereof.10.Cosmetic composition according to any one of claims 1 to 9, comprising less than 70 wt%of water, more preferably less than 30 wt%water, still more preferably less than 10 wt%of water, and most preferably no water or essentially no water.11.Cosmetic composition according to any one of claims 1 to 10, wherein- the concentration of octyldodecyl lactate, if present, is about 1 wt%to about 99.9 wt%, more preferably about 10 wt%to about 99 wt%, still more preferably about 50 wt%to about 98 wt%, and most preferably about 97.7 wt%; and / or- the concentration of dimethyl isosorbide, if present, is about 1 wt%to about 99.9 wt%, more preferably about 10 wt%to about 99 wt%, still more preferably about 50 wt%to about 98 wt%, and most preferably about 97.7 wt%; and / or- the concentration of isostearyl isostearate, if present, is about 1 wt%to about 99.9 wt%, more preferably about 10 wt%to about 90 wt%, still more preferably about 20 wt%to about 50 wt%, and most preferably about 32 wt%; and / or- the concentration of isononyl isononanoate, if present, is about 0.1 wt%to about 20 wt%, more preferably about 0.5 wt%to about 10 wt%, still more preferably about 1 wt%to about 5 wt%, and most preferably about 2 wt%; and / or- the concentration of dicapryl carbonate, if present, is about 0.1 wt%to about 20 wt%, more preferably about 0.5 wt%to about 10 wt%, still more preferably about 1 wt%to about 5 wt%, and most preferably about 2 wt%; and / or- the concentration of neopentyl glycol dicaprate, if present, is about 0.1 wt%to about 20 wt%, more preferably about 0.5 wt%to about 10 wt%, still more preferably about 1 wt%to about 5 wt%, and most preferably about 2 wt%; and / or- the concentration of triethylhexanoin, if present, is about 0.1 wt%to about 20 wt%, more preferably about 0.5 wt%to about 10 wt%, still more preferably about 1 wt%to about 5 wt%, and most preferably about 2 wt%; and / or- the concentration of diethylhexyl carbonate, if present, is about 0.1 wt%to about 20 wt%, more preferably about 0.5 wt%to about 10 wt%, still more preferably about 1 wt%to about 5 wt%, and most preferably about 2 wt%; and / or- the concentration of hexyldecanol, if present, is about 0.1 wt%to about 50 wt%, more preferably about 0.5 wt%to about 20 wt%, still more preferably about 1 wt%to about 5 wt%, and most preferably about 2.5 wt%; and / or- the concentration of octyldodecanol, if present, is about 1 wt%to about 99.9 wt%, more preferably about 10 wt%to about 99 wt%, still more preferably about 50 wt%to about 98 wt%, and most preferably about 97.7 wt%; and / or- the concentration of dipentaerythrityl tri-polyhydroxystearate, if present, is about 0.1 wt%to about 20 wt%, more preferably about 0.5 wt%to about 10 wt%, still more preferably about 1 wt%to about 5 wt%, and most preferably about 2 wt%; and / or- the concentration of dipentaerythrityl tetraisostearate, if present, is about 0.1 wt%to about 10 wt%, more preferably about 0.2 wt%to about 5 wt%, still more preferably about 0.3 wt%to about 1 wt%, and most preferably about 0.5 wt%; and / or- the concentration of dipentaerythrityl tetrahydroxystearate, if present, is about 0.1 wt%to about 10 wt%, more preferably about 0.2 wt%to about 5 wt%, still more preferably about 0.3 wt%to about 1 wt%, and most preferably about 0.5 wt%; and / or- the concentration of dipentaerythrityl pentaisostearate, if present, is about 0.1 wt%to about 10 wt%, more preferably about 0.2 wt%to about 5 wt%, still more preferably about 0.3 wt%to about 1 wt%, and most preferably about 0.5 wt%; and / or- the concentration of dipentaerythrityl hexaisostearate, if present, is about 0.1 wt%to about 10 wt%, more preferably about 0.2 wt%to about 5 wt%, still more preferably about 0.3 wt%to about 1 wt%, and most preferably about 0.5 wt%; and / or- the concentration of dipentaerythrityl hexahydroxystearate, if present, is about 0.1 wt%to about 10 wt%, more preferably about 0.2 wt%to about 5 wt%, still more preferably about 0.3 wt%to about 1 wt%, and most preferably about 0.5 wt%; and / or- the concentration of polyglyceryl-4 isostearate, if present, is about 0.1 wt%to about 5 wt%, more preferably about 0.2 wt%to about 1 wt%, still more preferably about 0.25 wt%to about 0.75 wt%, and most preferably about 0.5 wt%; and / or- the concentration of polyglyceryl-5 trioleate, if present, is about 0.1 wt%to about 8 wt%, more preferably about 0.15 wt%to about 1 wt%, still more preferably about 0.2 wt%to about 0.5 wt%, and most preferably about 0.25 wt%; and / or- the concentration of polyglyceryl-10 nonaisostearate, if present, is about 0.1 wt%to about 8 wt%, more preferably about 0.15 wt%to about 1 wt%, still more preferably about 0.2 wt%to about 0.5 wt%, and most preferably about 0.25 wt%; and / or- the concentration of polyglyceryl-10 decaisostearate, if present, is about 0.1 wt%to about 8 wt%, more preferably about 0.15 wt%to about 1 wt%, still more preferably about 0.2 wt%to about 0.5 wt%, and most preferably about 0.25 wt%; and / or- the concentration of olive oil PEG-7 ester, if present, is about 0.3 wt%to about 1 wt%, more preferably about 0.4 wt%to about 0.9 wt%, still more preferably about 0.5 wt%to about 0.8 wt%, and most preferably about 0.7 wt%; and / or- the concentration of polysorbate 60, if present, is about 0.01 wt%to about 0.2 wt%, more preferably about 0.05 wt%to about 0.15 wt%, still more preferably about 0.075 wt%to about 0.125 wt%, and most preferably about 0.1 wt%; and / or- the concentration of polysorbate 80, if present, is about 0.01 wt%to about 0.2 wt%, more preferably about 0.05 wt%to about 0.15 wt%, still more preferably about 0.075 wt%to about 0.125 wt%, and most preferably about 0.1 wt%; and / or- the concentration of sorbitan stearate, if present, is about 0.1 wt%to about 1.25 wt%, more preferably about 0.2 wt%to about 1 wt%, still more preferably about 0.25 wt%to about 0.75 wt%, and most preferably about 0.5 wt%; and / or- the concentration of sorbitan distearate, if present, is about 0.1 wt%to about 1.25 wt%, more preferably about 0.2 wt%to about 1 wt%, still more preferably about 0.25 wt%to about 0.75 wt%, and most preferably about 0.5 wt%; and / or- the concentration of sorbitan sesquistearate, if present, is about 0.1 wt%to about 1.25 wt%, more preferably about 0.2 wt%to about 1 wt%, still more preferably about 0.25 wt%to about 0.75 wt%, and most preferably about 0.5 wt%; and / or- the concentration of trilaureth-4 phosphate, if present, is about 0.1 wt%to about 10 wt%, more preferably about 0.2 wt%to about 5 wt%, still more preferably about 0.5 wt%to about 1 wt%, and most preferably about 0.75 wt%; and / or- the concentration of laureth-4, if present, is about 0.1 wt%to about 10 wt%, more preferably about 0.2 wt%to about 5 wt%, still more preferably about 0.5 wt%to about 1 wt%, and most preferably about 0.75 wt%; and / or- the concentration of squalene, if present, is about 0.01 wt%to about 50 wt%, more preferably about 0.1 wt%to about 40 wt%, still more preferably about 10 wt%to about 30 wt%, and most preferably about 20 wt%; and / or- the concentration of bisabolol, if present, is about 0.000001 wt%to about 5 wt%, more preferably about 0.01 wt%to about 1 wt%, still more preferably about 0.1 wt%to about 0.5 wt%, and most preferably about 0.2 wt%; and / or- the concentration of Simmondsia chinensis (Jojoba) seed oil, if present, is about 1 wt%to about 98 wt%, more preferably about 10 wt%to about 90 wt%, still more preferably about 15 wt%to about 60 wt%, and most preferably about 20 wt%to about 40 wt%; and / or- the concentration of dimethylmethoxy chromanol, if present, is about 0.001 wt%to about 5 wt%, more preferably about 0.01 wt%to about 2 wt%, still more preferably about 0.03 wt%to about 1 wt%, and most preferably about 0.05 wt%to about 0.1 wt%.12.Method of preparing the cosmetic composition according to any one of claims 1 to 11, comprising the steps of:(i) heating the emollient and / or emulsifier to a temperature of between about 50 ℃ and about 80 ℃;(ii) adding the cosmetic active ingredient; and(iii) mixing to obtain the cosmetic composition.13.Method of preventing skin photo-ageing, stimulating keratinocytes proliferation, improving skin barrier, alleviating skin erythema and / or alleviating itching symptoms by applying the cosmetic composition of any one of claims 1 to 11 to human skin.14.Use of the cosmetic composition of any one of claims 1 to 11 for preventing skin photo-ageing, stimulating keratinocytes proliferation, improving skin barrier, alleviating skin erythema and / or alleviating itching symptoms.
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