Improving water resistance of cosmetic compositions containing UV filters

Abstract

The present invention relates to a cosmetic composition comprising a UV filter, an ester of a fatty acid and a dextrin, a mixture of branched and linear saturated C15-C19, and a specific cellulose derivative, wherein the mixture mainly comprises branched saturated C15-C19. This cosmetic composition has significantly improved water resistance.

Description

Detailed Description of the Invention

[0001] [Technical field] The present invention relates to the field of cosmetic compositions that provide protection from UV light.

[0002] [Background of the invention] For years now, there has been a trend away from elegant and unhealthy whiteness in favor of a "healthy and athletic brown skin". People who want to achieve this expose their skin to sunlight, as it produces pigment in the form of melanogenesis. However, the ultraviolet radiation of sunlight can also damage the skin. Excessive exposure of the skin to light in the UV(B) range (wavelengths: 280-315 nm) can cause acute damage (sunburn) as well as long-term damage, such as an increased risk of skin cancer. Excessive exposure to UV(B) and UV(A) radiation (wavelengths: 315-400 nm) also reduces the strength of elastin and collagen fibers in the connective tissue. This causes many phototoxic and photoallergic reactions, which result in premature aging of the skin.

[0003] Therefore, a series of photoprotective screening substances have been developed that can be used in cosmetic formulations to protect the skin.

[0004] The ability of a cosmetic composition to protect the skin from UV radiation is commonly expressed in terms of the Sun Protection Factor (SPF).

[0005] When a UV protective cosmetic composition comes into contact with water, such as that typically encountered during bathing, it usually removes significant amounts of the UV filters from the skin, resulting in a reduced ability to protect against UV light, which can be manifested as a significant reduction in the SPF of the composition.

[0006] [Summary of the invention] The problem that the present invention aims to solve is therefore to improve the water resistance of cosmetic compositions containing at least one UV filter.

[0007] Surprisingly, it has been found that this problem can be solved by the cosmetic composition according to claim 1.

[0008] Specifically, by adding a specific cellulose in combination with a mixture of branched and linear saturated C15-C19 alkanes and an ester of a fatty acid and dextrin to a cosmetic composition containing a UV filter, the water resistance of the cosmetic composition containing a UV filter can be significantly improved.

[0009] Specifically, it was found that this three-type combination (a combination of a specific cellulose with a mixture of branched and linear saturated C15-C19 alkanes and an ester of a fatty acid with dextrin) was far superior to a two-type combination (a combination of a specific cellulose with a mixture of branched and linear saturated C15-C19 alkanes) (a mixture of branched and linear saturated C15-C19 alkanes and an ester of a fatty acid with dextrin).

[0010] Further aspects of the invention are the subject matter of further independent claims. Particularly preferred embodiments are the subject matter of the dependent claims.

[0011] [Detailed Description of the Invention] In a first aspect, the present invention provides a method for producing a composition comprising the steps of: -UV filters; - a mixture of branched and linear saturated C15-C19 alkanes; -esters of fatty acids with dextrin; -C 1~6 Alkyl cellulose or hydroxy-C 2~6 Alkyl(C 1~6 Alkyl)cellulose or carboxy C 1~6 Alkyl(C 1~6 cellulose, which is an alkyl)cellulose; A cosmetic composition comprising: The cosmetic composition relates to a cosmetic composition, wherein the amount of branched saturated C15-C19 alkanes in said mixture of branched and linear saturated C15-C19 alkanes is more than 80% by weight, preferably more than 90% by weight, most preferably more than 92% by weight.

[0012] In this specification, "C x~y An "alkyl" group is an alkyl group containing x to y carbon atoms, i.e., for example, C 1~3 An alkyl group is an alkyl group containing 1 to 3 carbon atoms. An alkyl group can be straight or branched. For example, -CH(CH3)-CH2-CH3 is considered a C4 alkyl group.

[0013] Similarly, "C x~y An "alkylene" group is an alkylene group containing x to y carbon atoms, i.e., for example, C 1~3 An alkylene group is an alkylene group containing 1 to 3 carbon atoms. An alkylene group can be straight or branched. For example, -CH2-CH2-CH2- and -CH(CH3)-CH2- and -C(CH2-CH3)- and -C(CH3)2- are all considered to be C3 alkylene groups.

[0014] As used herein, "C x~y "Alkyl cellulose" is an alkylated C x~y It is a cellulose having alkyl groups, in other words, this cellulose has some of the -OH groups replaced by -OC x~y For example, a C1 alkyl cellulose is methyl cellulose, and a C2 alkyl cellulose is ethyl cellulose.

[0015] "Hydroxy-C x~y Alkyl(C x~y The term "hydroxy-C alkyl cellulose" refers to x~y Alkyl cellulose and hydroxy-C x~y Alkyl C x~y It is understood to also denote alkylcelluloses.

[0016] "Hydroxy-C x~y Alkyl cellulose is a type of cellulose in which a specific -OH group is -OC x~y It is a cellulose substituted with alkylene-OH groups. For example, a hydroxy-C3 alkyl cellulose is hydroxypropyl cellulose.

[0017] "Hydroxy-C x~y Alkyl C x~y Alkyl cellulose is a type of cellulose in which a specific -OH group is replaced by -OC x~y The alkylene -OH group also has -OC x~y Cellulose that also has alkyl groups substituted, for example, hydroxy-C2 alkyl C1 alkyl cellulose is hydroxyethyl methyl cellulose.

[0018] Similarly, "Carboxy C x~y Alkyl(C x~y The term "carboxy-C alkyl cellulose" refers to x~y Alkyl cellulose and carboxy C x~y Alkyl C x~y It is understood to also denote alkylcelluloses.

[0019] "Carboxy-C x~y Alkyl cellulose is a type of cellulose in which a specific -OH group is -OC x~y Alkylene -COOH or -OC x~y Alkylene-COO - For example, carboxy-C1 alkyl cellulose is carboxymethyl cellulose.

[0020] "Carboxy C x~y Alkyl C x~y Alkyl cellulose is a type of cellulose in which a specific -OH group is replaced by -OC x~y The alkyl group also has -OC x~y -Alkylene-COOH or -OC x~y Alkylene-COO - For example, carboxymethylethylcellulose or sodium carboxymethylethylcellulose are both considered carboxy C1 alkyl C2 alkylcelluloses.

[0021] In this specification, when the same symbol occurs for a symbol or group in several formulas, the definition of said group or symbol given in relation to one particular formula also applies to other formulas containing the same symbol.

[0022] The term "UV filter" in this specification refers to a substance that absorbs ultraviolet light (=UV light), i.e. electromagnetic radiation with a wavelength of 280-400 nm. A UV(A) filter is a UV filter that absorbs UV(A) light, i.e. electromagnetic radiation with a wavelength of 315-400 nm. A UV(B) filter is a UV filter that absorbs UV(B) light, i.e. electromagnetic radiation with a wavelength of 280-315 nm.

[0023] Liquid organic UV filters are liquid at ambient temperature (ie, 25° C.).

[0024] Solid organic UV filters are solid at ambient temperature (ie, 25° C.).

[0025] By "mixture of branched and linear saturated C15-C19 alkanes" herein is meant that the mixture comprises different alkanes, each of which has only 15, 16, 17, 18 or 19 carbon atoms, and does not contain any alkanes below that number of carbon atoms. Thus, such a mixture does not, for example, contain dodecane or isododecane. The mixture comprises both branched and linear C15-C19 alkanes.

[0026] [Mixture of branched and linear saturated C15-C19 alkanes] The present cosmetic composition comprises a mixture of branched and linear saturated C15-C19 alkanes.

[0027] Particularly suitable mixtures of C15 to C19 alkanes are, in particular, those disclosed in WO 2016 / 185046, WO 2017 / 046177, WO 2018 / 109353 A1 and WO 2018 / 109354 A1 and WO 2018 / 172228 A1.

[0028] Preferably, the mixture of branched and linear saturated C15-C19 alkanes has a content of bio-derived carbon of 90% or more based on the total weight of the mixture of branched and linear saturated C15-C19 alkanes. It is highly advantageous for chemicals to be derived from living organisms, as this increases the sustainability of such substances. Highly sustainable products or compositions are in high demand in the market.

[0029] The determination of the biobased content or biobased carbon content is carried out according to ASTM Standards D 6866-12, Method B (ASTM D 6866-06) and ASTM D 7026 (ASTM D 7 026-04). ASTM Standard D 6866 is concerned with “Determining the Biobased Content of Natural Range Materials Using Radiocarbon and Isotope Ratio Mass Spectrometry Analysis”, while ASTM Standard D 7 026 is concerned with “Sampling and Reporting of Results for Determination of Biobased Content of Materials via Carbon Isotope Analysis”. The first paragraph of the second listed standard refers to the first listed standard. The first standard refers to the determination of the sample’s 14 C / 12 The paper describes a test to measure the C ratio of the sample, which is compared with a standard sample derived from 100% renewable materials. 14 C / 12 By comparing the C ratio with the C ratio, the relative proportion of C from renewable materials in the sample is given. 14 It is based on the same concept as C dating.

[0030] More preferably, the composition does not contain any aromatic hydrocarbons or contains them in very small amounts (less than 100 ppm, in particular less than 30 ppm) relative to the total weight of the mixture of branched and linear saturated C15 to C19 alkanes.

[0031] The mixture of branched and linear saturated C15-C19 alkanes is produced by catalytic hydrogenation of a hydrocarbon biomass feedstock, in particular as detailed in WO 2016 / 185046, in particular as disclosed as Example 3 of WO 2016 / 185046.

[0032] Preferably, the amount of linear saturated C15-C19 alkanes in said mixture of branched and linear saturated C15-C19 alkanes is less than 10% by weight, preferably less than 8% by weight, most preferably greater than 5% by weight.

[0033] More preferably, the amount of C15 is less than 3% by weight, in particular less than 1% by weight, preferably less than 0.05% by weight, relative to the weight of said mixture of branched and linear saturated C15 to C19 alkanes.

[0034] Preferably, the mixture of branched and straight-chain saturated C15-C19 alkanes is a mixture of branched and straight-chain saturated C16-C19 alkanes.

[0035] More preferably, the amount of branched saturated C16-C18 alkanes is more than 90% by weight, preferably more than 95% by weight, based on the weight of said mixture of branched and linear saturated C15-C19 alkanes.

[0036] More preferably, the amount of C15 alkanes is less than 5% by weight, in particular less than 2% by weight, based on the weight of said mixture of branched and linear saturated C15 to C19 alkanes.

[0037] More preferably, the amount of branched saturated C17-C18 alkanes is more than 85% by weight, preferably more than 92% by weight, based on the weight of said mixture of branched and linear saturated C15-C19 alkanes.

[0038] More preferably, the amount of C17 alkane is between greater than 15 and 20% by weight based on the weight of said mixture of branched and linear saturated C15-C19 alkanes.

[0039] More preferably, the amount of branched saturated C18 alkanes is more than 50% by weight, preferably more than 60% by weight, more preferably more than 70% by weight, based on the weight of said mixture of branched and linear saturated C15-C19 alkanes.

[0040] More preferably, the amount of C18 alkanes is in particular between 70 and 75% by weight, based on the weight of said mixture of branched and linear saturated C15 to C19 alkanes.

[0041] In other words, the mixture of branched and linear saturated C15-C19 alkanes preferably consists primarily of C18 alkanes, and most preferably consists primarily of branched C18 alkanes.

[0042] Since the composition comprises a mixture of branched and linear saturated C15-C19 alkanes, said composition does not comprise lower alkanes, i.e. in particular it does not comprise C12 alkanes, and in particular it does not comprise C12 alkanes, nor C13 alkanes, nor C14 alkanes.

[0043] More preferably, the mixture of C15 to C19 alkanes has a viscosity at 20° C. of 3 to 15 mPa·s, particularly preferably 6 to 12 mPa·s.

[0044] The refractive index of the mixture of C15 to C19 alkanes at 20° C. is more preferably 1.40 to 1.48, particularly preferably 1.42 to 1.45, and most preferably 1.43 to 1.44.

[0045] More preferably, the mixture of C15 to C19 alkanes is the mixture of C15 to C19 alkanes commercialized as EMOGREEN (trademark) L19 from SEPPIC.

[0046] The amount of the mixture of branched and linear saturated C15-C19 alkanes is in the range of 0.5-12.0% by weight, in particular in the range of 1.0-10.0% by weight, more preferably in the range of 1.5-8.0% by weight, preferably in the range of 2.0-6.0% by weight, based on the weight of the hair care product.

[0047] [Ester of fatty acid and dextrin] The composition further comprises an ester of a fatty acid and a dextrin.

[0048] Dextrin is an oligomer of D-glucose. Its structure can be represented by the simplified structure shown below. [ka]

[0049] Dextrins have various average degrees of glycopolymerization and, as a result, various molecular weights.

[0050] The dextrin of the ester of a fatty acid and a dextrin in the present invention preferably has an average degree of polymerization of the sugar chain of 3-20, particularly 8-16.

[0051] The fatty acid of the ester of fatty acid and dextrin is preferably a C14 to C18 fatty acid, particularly a straight-chain C14 to C18 fatty acid, most preferably palmitic acid.

[0052] A particularly suitable ester of fatty acid and dextrin is dextrin palmitate, commercially available as Rheopearl® KL2 from Chiba Flour Milling.

[0053] Dextrin has several hydroxyl groups which can be esterified.

[0054] Preferably, the average number of esterified hydroxyl groups of said esters of fatty acids with dextrin is greater than 2.5 per glucose unit, preferably between 2.5 and 3.5, more preferably between 2.5 and 3.4, most preferably between 2.5 and 3.2.

[0055] In one embodiment, the average number of esterified hydroxyl groups of the ester of fatty acid with dextrin is greater than 2.5, preferably between 2.7 and 3.5, more preferably between 28 and 3.4, and most preferably between 2.8 and 3.2 per glucose unit.

[0056] In another embodiment, the average number of esterified hydroxyl groups of the esters of fatty acids with dextrin is greater than 3, preferably between 3.05 and 3.5, more preferably between 3.1 and 3.4, and most preferably between 3.1 and 3.2 per glucose unit.

[0057] That is, preferably, essentially all of the hydroxyl groups of the dextrin are esterified.

[0058] More preferably, the molecular weight M of the ester of fatty acid and dextrin is n is between 8000 and 16000 Da, preferably between 9000 and 13000 Da, and more preferably between 10000 and 11500 Da.

[0059] The molecular weight Mn is determined in particular in Daltons (Da) by SEC / GPC using polystyrene as standard.

[0060] Both fatty acids and dextrins are of biological origin. It is highly advantageous that chemical substances are of biological origin, due to the high sustainability of such substances or their products. Sustainable products or compositions are in high demand in the market.

[0061] The amount of the fatty acid and dextrin ester is preferably in the range of 0.1 to 15 wt.%, particularly in the range of 0.3 to 8.0 wt.%, particularly in the range of 0.6 to 7.0 wt.%, more preferably in the range of 1.0 to 6.0 wt.%, particularly in the range of 1.5 to 5.0 wt.%, based on the weight of the cosmetic composition.

[0062] In the composition, the ratio of the weight of the ester of fatty acid and dextrin to the weight of the mixture of branched and linear saturated C15-C19 alkanes is preferably less than 1, preferably in the range of 0.5-0.8, and most preferably in the range of 0.55-0.70.

[0063] That is, preferably, the weight of the C15 to C19 alkane contained in the present composition is greater than the weight of the ester of fatty acid and dextrin.

[0064] [UV filter] The composition further comprises a UV filter, which may be either an inorganic or an organic UV filter, preferably a liquid organic UV filter or a solid organic UV filter.

[0065] Suitable liquid organic UV filters absorb light in the UV(B) and / or UV(A) range and are liquid at ambient temperature (i.e. 25° C.). Such liquid UV filters are known to the person skilled in the art and include in particular cinnamic acid esters such as octyl methoxycinnamate (PARSOL® MCX) and isoamyl methoxycinnamate (Neo Heliopan® E 1000), salicylic acid esters such as homosalate (3,3,5 trimethylcyclohexyl 2-hydroxybenzoate, PARSOL® HMS) and ethylhexyl salicylate (also known as ethylhexyl salicylate, 2-hydroxybenzoate, PARSOL® EHS), acrylic acid esters such as octocrylene (2-cyano-3,3-diphenyl 2-ethylhexyl acrylate, PARSOL® 340) and 2-cyano-3,3 These include esters of benzalmalonic acid, particularly dialkyl benzalmalonates, such as di(2-ethylhexyl) 4-methoxybenzalmalonate and polysilicone 15 (Parsol® SLX), dialkyl esters of naphthalic acid, such as diethylhexyl naphthalene dicarboxylate (Corapan® TQ), syringylidene malonate esters, such as diethylhexyl syringylidene malonate (Oxynex® ST liquid), and benzotriazolyl dodecyl p-cresol (Tinoguard® TL), as well as oxybenzone-3 and drometrizole trisiloxane.

[0066] It has been found that polysilicone-based organic UV filters (such as polysilicon 15) do not reduce material migration significantly, and therefore it is preferred that the cosmetic composition does not include polysilicone-based organic UV filters.

[0067] Particularly advantageous liquid organic UV filters are octyl methoxycinnamate, homosalate, ethylhexyl salicylate, octocrylene, diethylhexyl naphthalene dicarboxylate, diethylhexyl syringylidene malonate, benzotriazolyl dodecyl p-cresol, oxybenzone-3, drometrizole trisiloxane and mixtures thereof.

[0068] In a preferred embodiment, the liquid UV filter is a liquid UV(B) filter selected from the group consisting of ethylhexyl methoxycinnamate, octocrylene, homosalate, ethylhexyl salicylate, oxybenzone-3 and drometrizole trisiloxane.

[0069] Suitable solid organic UV filters absorb light in the UV(B) and / or UV(A) region and are solid at ambient temperature (i.e. 25° C.). Particularly suitable solid UV filters are those from the group consisting of bisethylhexyloxyphenol methoxyphenyl triazine, butyl methoxydibenzoylmethane, methylene bisbenzotriazolyl tetramethylbutylphenol, diethylamino hydroxybenzoyl hexyl benzoate, ethylhexyl triazone, diethylhexyl butamido triazone, 4-methylbenzylidene camphor and 1,4-di(benzoxazol-2′-yl)benzene.

[0070] Preferred solid organic UV(A) filters are UV(A) filters selected from the group consisting of bisethylhexyloxyphenol methoxyphenyl triazine, butyl methoxydibenzoylmethane, methylene bisbenzotriazolyl tetramethylbutylphenol and diethylamino hydroxybenzoyl hexyl benzoate.

[0071] Preferred solid organic UV(B) filters are UV(B) filters selected from the group consisting of ethylhexyl triazone (=Uvinul® T150), diethylhexylbutamido triazone (=Uvasorb® HEB) and 4-methylbenzylidene camphor (=Parsol® 5000).

[0072] The total amount of organic UV filters depends largely on the desired UV protection.

[0073] Preferably, the amount of solid organic UV filters, in particular solid organic UV(A) filters, is chosen in the range of 0.1 to about 6% by weight, preferably 0.5 to 5% by weight, most preferably 1 to 4% by weight.

[0074] More preferably, the amount of solid organic UV filters, in particular solid organic UV(B) filters, is chosen in the range of 0.1 to about 6% by weight, preferably 0.5 to 5% by weight, most preferably 1 to 4% by weight.

[0075] More preferably, the amount of liquid organic UV filter, in particular liquid organic UV(B) filter, is chosen in the range of 0.1 to about 10% by weight, preferably 0.5 to 8% by weight, most preferably 1 to 6% by weight.

[0076] In one embodiment, the cosmetic composition comprises at least two UV filters, at least one of which is a solid or liquid organic UV (A) filter and at least one of which is a solid or liquid organic UV (B) filter.

[0077] In said embodiment, the composition preferably comprises at least two organic UV filters, of which at least one is a solid or liquid organic UV (A) filter and at least one is a solid or liquid organic UV (B) filter.

[0078] A combination of at least one solid organic UV(A) filter with at least one liquid organic UV(B) filter is preferred.

[0079] In said embodiment, a combination of at least one solid organic UV(A) filter selected from the group consisting of bisethylhexyloxyphenol methoxyphenyl triazine, butyl methoxydibenzoylmethane, methylene bisbenzotriazolyl tetramethylbutylphenol and diethylamino hydroxybenzoyl hexyl benzoate with at least one liquid organic UV(B) filter selected from the group consisting of ethylhexyl methoxycinnamate, octocrylene, homosalate, ethylhexyl salicylate, oxybenzone-3 and drometrizole trisiloxane is particularly preferred.

[0080] The total amount of organic UV filters depends largely on the UV protection targeted by the composition and typically ranges from 1 to 50% by weight, preferably 5 to 40% by weight, based on the total weight of the composition.

[0081] A sun cream with an SPF of 15, for example, contains organic UV filters in a total amount of preferably 4 to 20% by weight, more preferably 7 to 15% by weight, based on the total weight of the composition.

[0082] A sun cream with an SPF of 30, for example, contains organic UV filters in a total amount of preferably 10 to 40% by weight, more preferably 15 to 25% by weight, based on the total weight of the composition.

[0083] A sun cream with an SPF of 50, for example, contains organic UV filters in a total amount of preferably 15 to 50% by weight, more preferably 20 to 40% by weight, based on the total weight of the composition.

[0084] In one preferred embodiment, the cosmetic composition comprises a compound represented by formula (I): [ka] Contains a UV filter.

[0085] The UV filter of formula (I) (CAS: [187393-00-6]) is a crystalline solid with a melting point of 83-85 °C and is also known as bemotrizinol or 2,4-bis-{[4-(2-ethyl-hexyloxy)-2-hydroxy]phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine or bis-ethylhexyloxyphenol methoxyphenyl triazine (INCI). It is a broad-spectrum UV absorber that absorbs UV(A) light as well as UV(B) light. It has two absorption maxima at 310 nm and 345 nm and is very photostable. Based on the maximum concentrations allowed by European legislation, it is the most effective UV absorber available, measured by SPF.

[0086] It is commercially available, for example, under the trade names Parsol® Shield from DSM Nutritional Products Ltd., Tinosorb® S from BASF and Escalol™ S UV filter from Ashland.

[0087] Due to its polarity, it is highly soluble in esters, especially alkyl benzoates (C12-15), but is insoluble in water and alkanes.

[0088] In another preferred embodiment, the cosmetic composition has the formula (II): [ka] Contains a UV filter.

[0089] The UV filter of formula (II) (CAS: [88122-99-0]) is a crystalline solid with a melting point of 129° C. and is also known as ethylhexyl triazone (INCI) or octyl triazone. This UV filter is a highly effective UV(B) filter with a very high absorption capacity. This UV filter has an absorption maximum at 314 nm. It is commercially available, for example, under the trade name Uvinal® T 150 from BASF.

[0090] Due to its polarity, it is very soluble in esters, especially ethyl acetate and ethanol, but is insoluble in water and alkanes.

[0091] In another preferred embodiment, the cosmetic composition has formula (III): [ka] Contains a UV filter.

[0092] The UV filter of formula (III) (CAS: [154702-15-5]) is a pale yellow crystalline solid having a melting point of 52-55° C. and is also known as iscotrizinol or diethylhexyl butamido triazone (INCI). This UV filter is a highly effective UV(A) and UV(B) filter with extremely high absorption capacity and very high photostability.

[0093] It has an absorption maximum at about 310 nm and is commercially available, for example, from 3V Sigma under the trade name UVASORB® HEB.

[0094] Due to its polarity, it is highly soluble in alcohols, especially ethanol, but is insoluble in water and alkanes.

[0095] In another preferred embodiment, the cosmetic composition has formula (IV): [ka] Contains a UV filter.

[0096] The UV filter of formula (IV) (CAS: [302776-68-7]) is a crystalline solid with a melting point of 54° C. and is also known as diethylamino hydroxybenzoyl hexyl benzoate (INCI). This UV filter is a very effective UV(A) filter with a relatively wide absorption range and an absorption maximum at 354 nm. It is commercially available, for example, from BASF under the trade name Uvinal® A Plus.

[0097] Due to its polarity, it is very soluble in esters, especially ethylhexyl benzoate, and in ethanol, but is insoluble in water and alkanes.

[0098] In another preferred embodiment, the cosmetic composition has formula (V): [ka] Contains a UV filter.

[0099] The UV filter of formula (V) (CAS: [6197-30-4]) is a colorless, transparent, highly viscous, oily liquid with a melting point at 14°C. It is also known as 2-cyano-3,3-diphenyl-2-propenoic acid 2-ethylhexyl ester and Octocrylene (INCI). The molecule absorbs UV(B) light at wavelengths between 280 and 320 nm due to conjugated extension of the acrylate moiety, protecting the skin from direct DNA damage. It has an absorption maximum at 310 nm. The UV filter of formula (V) has a very high photostability and is an excellent solubilizer of solid crystalline UV filters. It is commercially available, for example, under the trade name Parsol® 340 from DSM Nutritional Products Ltd. or under the trade name Uvinal® N539T from BASF. The product Parsol® 340 from DSM Nutritional Products Ltd. is most preferred.

[0100] Due to its polarity, octocrylene is highly soluble in propylene carbonate and dipropylene glycol, but is insoluble in water and alkanes.

[0101] In another preferred embodiment, the cosmetic composition has formula (VI): [ka] Contains a UV filter.

[0102] The UV filter of formula (VI) (CAS: [103597-45-1]) is a solid with a melting point of 197-199° C. It is also known as bisoctrizole or methylene bis-benzotriazolyl tetramethylbutylphenol (INCI).

[0103] Bisoctrizol is a broad spectrum ultraviolet radiation filter that absorbs not only UV(B) light but also UV(A) light and has excellent photostability. It has absorption maxima at 308nm and 349nm. Meanwhile, it not only absorbs UV light but also reflects and scatters UV light. Therefore, Bisoctrizol is a multi-functional UV absorber and an organic UV filter that is manufactured as fine (<200nm) organic particles. Whereas other organic UV filters need to be dissolved in either oil or aqueous phases, Bisoctrizol is applied as invisible particles since it is difficult to dissolve in either.

[0104] Primarily Bisoctrizole is available as a fine powder in a 50% aqueous suspension stabilized with the surfactant decyl glucoside, for example from DSM Nutritional Products Ltd. under the trade name Parsol® Max, or from BASF under the trade name Tinosorb® M, or from Everlight Chemical as Eversorb M, or as Milestab 360. Most preferred is the product Parsol® Max from DSM Nutritional Products Ltd.

[0105] Bisoctrizole has extremely low solubility in most solvents or cosmetic oils, and is essentially insoluble or poorly soluble in water and alkanes.

[0106] In another preferred embodiment, the cosmetic composition has formula (VII): [ka] Contains a UV filter.

[0107] The UV filter of formula (VII) (CAS: [27503-81-7]) is a solid with a melting point of 1>300° C. It is also known as phenylbenzimidazole sulfonic acid (INCI name) and ensulizole.

[0108] Enthrizole is a strong UV(B) light filter that specifically absorbs light in the 280-340 nm region with an absorption maximum at 302 nm.

[0109] Enthrizole is a UV filter that is widely used in sun protection products. Because it is water-soluble, it is often used in products that are formulated to be light-feeling and less oily. Because of its poor absorption properties for UV(A) light, it is usually used in combination with other UV filters, especially UV(A) filters, especially avobenzone.

[0110] Enthrisol is commercialized by Merck KGaA under the trade name EUSOLEX® 232 and by DSM Nutritional Products Ltd. under the trade name Parsol® HS, among others.

[0111] In another preferred embodiment, the cosmetic composition has formula (VIII): [ka] Contains a UV filter.

[0112] The UV filter of formula (VIII) (CAS: [5466-77-3]) is a yellowish transparent liquid with a boiling point of about 199°C, insoluble in water, soluble in fats, oils and alcohols. It is also known as Ethylhexyl Methoxycinnamate (INCI name) and Octinoxate.

[0113] Ethylhexyl methoxycinnamate is a strong UV(B) light filter with an absorption maximum at 310 nm.

[0114] Ethylhexyl methoxycinnamate is commercialized under the trade name Eusolex® 2292 by Merck KGaA, under the trade name Uvinal® MC80 by BASF, and under the trade name Parsol® MCX by DSM Nutritional Products Ltd., among others.

[0115] In another preferred embodiment, the cosmetic composition comprises polysilicone-15, formula (IX): [ka] [ka] Contains a UV filter.

[0116] The UV filter of formula (IX) (CAS: [207574-74-1]) is a colorless to pale yellow viscous liquid, insoluble in water, but soluble in organic solvents of moderate polarity and typical cosmetic oils. It is also known as dimethicodiethyl benzalmalonate.

[0117] Polysilicone-15 is a UV(B) light filter with an absorption maximum at about 310 nm.

[0118] Polysilicone-15 is commercially available from DSM Nutritional Products Ltd. under the trade name Parsol® SLX.

[0119] In another preferred embodiment, the cosmetic composition comprises an inorganic UV filter which is a double-coated TiO2, preferably rutile TiO2, with silica on the inside and an organic coating, typically dimethicone, on the outside, and the inorganic UV filter is a UV(B) light filter.

[0120] A preferred UV filter of this type is commercially available from DSM Nutritional Products Ltd. under the trade name Parsol® TX.

[0121] In another preferred embodiment, the cosmetic composition has the formula (X): [ka] Contains a UV filter.

[0122] The UV filter of formula (X) (CAS: [70356-09-1]) is a white to yellowish crystalline powder, which is insoluble in water but soluble in isopropanol, dimethyl sulfoxide, decyl oleate, caprylic / capric triglyceride and other oils.

[0123] The UV filter of formula (X) is known as 1-(4-methoxyphenyl)-3-(4-tert-butylphenyl)propane-1,3-dione or as butyl methoxydibenzoylmethane (INCI name) and as avobenzone.

[0124] Avobenzone is a highly efficient UV(A) light filter that specifically absorbs light in the range of 315-380 nm, with an absorption maximum at 357 nm.

[0125] Avobenzone is commercialized by Ashland under the trade name Escarol 517, by Merck KGaA under the trade name Eusolex® 9020, by Symrise under the trade name NEO HELIOPAN 357, and by DSM Nutritional Products Ltd. under the trade name Parsol® 1789, among others.

[0126] In another preferred embodiment, the cosmetic composition has formula (XI): [ka] Contains a UV filter.

[0127] The UV filter of formula (XI) (CAS: [118-60-5]) is a colorless, transparent liquid, insoluble in water and other polar solvents, and soluble in non-polar solvents and cosmetic oils. The UV filter of formula (XI) is also known as Ethylhexyl Salicylate (INCI name) or Octyl Salicylate or Octisalate.

[0128] Ethylhexyl salicylate is a highly effective UV(B) light filter with an absorption maximum at 305 nm. Octisalate is a weaker UV(B) light filter, but is more stable than some other sunscreen actives and does not generate reactive oxygen species when exposed to sunlight. Other UV filters, such as avobenzone, are solubilized by ethylhexyl salicylate.

[0129] Ethylhexyl salicylate is commercialized by Ashland under the trade name Escarol 587, by Merck Kagaku & Co. under the trade name Eusolex® OS, by Symrise under the trade name NEO HELIOPAN OS, and by DSM Nutritional Products Ltd. under the trade name Parsol® EHS 1789, among others.

[0130] In particular, the UV filter is selected from the group consisting of ethylhexyl triazone, avobenzone, bisethylhexyloxyphenol methoxyphenyl triazine, 2-ethylhexyl salicylate, phenylbenzimidazole sulfonic acid, ethylhexyl methoxycinnamate, octocrylene, polysilicone-15, iscotridenol, titanium dioxide and methylene bisbenzotriazolyl tetramethylbutylphenol.

[0131] The cosmetic composition preferably has a sun protection factor (SPF) of 10 or more, preferably 20 or more, more preferably 30 or more.

[0132] [cellulose] Cellulose has the formula (CH 10 O5) m It is an organic compound represented by the formula: and is a polysaccharide consisting of a linear chain of a very large number (m), typically hundreds to thousands, of D-glucose units linked in a β(1→4) chain.

[0133] Cellulose is the C 1~6 Alkyl cellulose or hydroxy-C 2~6 Alkyl(C 1~6 -alkyl)cellulose or carboxy C 1~6 -Alkyl(C 1~6 It is the starting material for the production of alkylcellulose.

[0134] In a preferred embodiment, the cellulose is 1~6 Alkyl cellulose, in particular methyl cellulose, ethyl cellulose or propyl cellulose, preferably methyl cellulose or ethyl cellulose. 1~6 Alkylcelluloses are generally used to synthesize cellulose and its corresponding halogenated C, especially in alkaline solutions. 1~6 It is prepared from an alkyl.

[0135] Methylcellulose [9004-67-5] is preferred and is widely available commercially, for example as Solterra™ Boost from Dow or as Methocel™ A brand products from Dow, particularly Methocel™ A4C PCG from Dow.

[0136] More preferred is ethyl cellulose [9004-57-3], which is widely available commercially, particularly from Ashland as Antaron™ ECo gel.

[0137] In another preferred embodiment, the cellulose is hydroxy-C 2~6 Alkyl cellulose, in particular hydroxyethyl cellulose, hydroxypropyl cellulose or hydroxybutyl cellulose, preferably hydroxyethyl cellulose or hydroxypropyl cellulose. Hydroxy-C 2~6 Alkylcelluloses are generally used to synthesize cellulose and their corresponding C 2~6 It is prepared from alkylene oxides.

[0138] Preferred is hydroxyethylcellulose [9004-62-0], which is widely available commercially, in particular from Ashland as Natrosol™ Hydroxyethylcellulose (HEC) branded products or from Dow as ™ branded products, more particularly from Ashland as Natrosol™ 250 HHR CS or as ™ HEC QP-15000H Europe PCG Thickener or C™ Hydroxyethyl Cellulose PCG-10 Europe or as ™ QP 4400H Hydroxyethyl Cellulose from Dow.

[0139] In another preferred embodiment, the cellulose is hydroxy-C 2~6 Alkyl C 1~6 Alkylcellulose, in particular hydroxyethyl methylcellulose or hydroxypropyl methylcellulose or hydroxyethyl ethylcellulose or hydroxypropyl ethylcellulose, hydroxyethyl propylcellulose or hydroxypropyl propylcellulose, preferably hydroxyethyl methylcellulose or hydroxypropyl methylcellulose or hydroxyethyl ethylcellulose or hydroxypropyl ethylcellulose.

[0140] Hydroxy-C 2~6 Alkyl C 1~6Alkylcelluloses are generally used to synthesize cellulose and their corresponding C 2~6 Alkylene oxides and their corresponding halides C 1~6 It is prepared from an alkyl.

[0141] Hydroxyethyl methylcellulose [9032-42-2], especially that commercialized as Structure® CEL 4400 E by Nouryon, is preferred.

[0142] More preferred is hydroxypropyl methylcellulose [9004-65-3], which is widely available commercially, particularly from Ashland as Benecel™ K200M, or from Dow as Methocel™ E brand products, Methocel™ F brand products, Methocel™ J brand products, and Methocel™ K brand products, particularly from Dow as Methocel™ K15M PCG.

[0143] In another preferred embodiment, the cellulose is carboxy-C 1~6 Alkyl cellulose, in particular carboxymethyl cellulose, carboxyethyl cellulose or carboxypropyl cellulose, preferably carboxymethyl cellulose, or a salt thereof.

[0144] Carboxy-C 1~6 Alkylcelluloses are generally used to synthesize cellulose and their corresponding chloro-C 2~7 It is prepared from alkanoic acids, especially chloroacetic acid.

[0145] Carboxymethylcellulose (available from Ashland as Blanose™ sodium carboxymethylcellulose, or from CP Kelco as Cekol® 700 or Cekol® 2000) is preferred.

[0146] In another preferred embodiment, the cellulose is carboxy C 1~6 Alkyl C 1~6 Alkylcellulose, in particular carboxymethyl methylcellulose, carboxyethyl methylcellulose or carboxypropyl methylcellulose, carboxymethyl ethylcellulose, carboxyethyl ethylcellulose or carboxypropyl ethylcellulose, carboxymethyl propylcellulose, carboxyethyl propylcellulose or carboxypropyl propylcellulose, preferably carboxymethyl methylcellulose or carboxyethyl methylcellulose, or a salt thereof.

[0147] Carboxy C 1~6 Alkyl C 1~6 Alkylcelluloses are generally used to synthesize cellulose and their corresponding chloro-C 2~7 Alkanoic acids, especially chloroacetic acids and their corresponding halogenated C 1~6 It is prepared from an alkyl.

[0148] Particularly preferably, the cellulose is selected from the group consisting of methylcellulose, ethylcellulose, propylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxyethylmethylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose, carboxymethylmethylcellulose and carboxymethylethylcellulose, preferably ethylcellulose.

[0149] Ethylcellulose, particularly that available from Ashland as Antaron™ ECo gel, is most preferred.

[0150] Preferably, C 1~6 Alkyl cellulose or hydroxy-C 2~6 Alkyl(C 1~6 Alkyl)cellulose or carboxy C 1~6 Alkyl(C 1~6The amount of cellulose, which is an alkyl)cellulose, is in the range of 0.01 to 4.0% by weight, particularly in the range of 0.1 to 3.0% by weight, preferably in the range of 0.3 to 2.5% by weight, based on the weight of the cosmetic composition.

[0151] [Additional ingredients] The cosmetic composition typically includes other ingredients suitable for use in cosmetic compositions.

[0152] The present cosmetic composition preferably comprises water.

[0153] The cosmetic composition may be in the form of a suspension or dispersion in a solvent or fatty substance, or in the form of an emulsion or microemulsion (in particular of the oil-in-water (O / W) or water-in-oil (W / O) type, silicone-in-water (Si / W) or water-in-silicone (W / Si) type, PIT-emulsion, multiple emulsion (for example of the oil-in-water-in-oil (O / W / O) or water-in-oil-in-water (W / O / W) type), Pickering emulsion, hydrogel, alcoholic gel, lipogel, single- or multiphase solution or vesicle dispersion, or other conventional forms which may also be applied by pen, as a facial pack or as a spray.

[0154] Preferred cosmetic compositions in all embodiments of the present invention include those that contain water and are in emulsion form.

[0155] In particular, the emulsion comprises an oily phase and an aqueous phase, such as in particular an O / W, W / O, Si / W, W / Si, O / W / O, W / O / W multiple or Pickering emulsion.

[0156] The total amount of oily phase present in such emulsions is preferably at least 10% by weight, for example in the range of 10 to 60% by weight, preferably in the range of 15 to 50% by weight, most preferably in the range of 15 to 40% by weight, based on the total weight of the cosmetic composition.

[0157] The amount of aqueous phase present in such emulsions is preferably at least 20% by weight, for example in the range of 40 to 90% by weight, preferably in the range of 50 to 85% by weight, most preferably in the range of 60 to 85% by weight, based on the total weight of the cosmetic composition.

[0158] More preferably, the cosmetic composition is in the form of an oil-in-water (O / W) emulsion comprising an oily phase dispersed in an aqueous phase in the presence of an O / W or Si / W emulsifier. The preparation of such O / W emulsions is known to those skilled in the art.

[0159] The composition in the form of an O / W emulsion can be provided, for example, in any formulation of an O / W emulsion, such as a serum, milk or cream, which are prepared according to the usual methods. This composition is preferably intended for topical application and can in particular constitute a dermatological or cosmetic composition, for example intended to protect the human skin against the harmful effects of UV radiation (anti-wrinkle, anti-aging, moisturizing, sun protection, etc.).

[0160] The cosmetic composition preferably further comprises a moisturizer or skin humectant, in particular glycerol and / or panthenol and / or propanediol and / or Pentavitin, in particular those commercially available as D-Panthenol 75 L or Tilamar® PDO with Noovista or Pentavitin® from DSM Nutritional Products Ltd.

[0161] The cosmetic composition preferably further comprises a feel enhancer, especially silica, preferably available as Valvance® Touch 210 from DSM Nutritional Products Ltd.

[0162] The cosmetic composition may further comprise commonly used oily and fatty components which may be selected from mineral oils and mineral waxes; oils, such as capric and / or caprylic triglycerides or castor oil; oils or waxes and other natural or synthetic oils, in preferred embodiments esters of fatty acids with alcohols, such as isopropanol, propylene glycol, glycerin, or esters of fatty alcohols with carbonic acid or fatty acids; benzoic acid alkyl esters; and / or silicone oils.

[0163] In particular, exemplary fatty substances that may be incorporated into the oily phase of the emulsions, microemulsions, oily gels, hydrodispersions or lipodispersions are advantageously chosen from esters of saturated and / or unsaturated linear or branched alkyl carboxylic acids having from 3 to 30 carbon atoms and saturated and / or unsaturated linear and / or branched alcohols having from 3 to 30 carbon atoms and esters of aromatic carboxylic acids and saturated and / or unsaturated linear or branched alcohols having from 3 to 30 carbon atoms. Such esters may advantageously be chosen from octyl palmitate, octyl cocoate, octyl isostearate, octyldodecyl myristate, cetearyl isononanoate, isopropyl myristate, isopropyl palmitate, isopropyl stearate, isopropyl oleate, n-butyl stearate, n-hexyl laurate, n-decyl oleate, isooctyl stearate, isononyl stearate, isononyl isononanoate, 2-ethylhexyl palmitate, 2-ethylhexyl laurate, 2-hexyldecyl stearate, 2-octyldodecyl palmitate, stearyl heptanoate, oleyl oleate, oleyl erucate, erucyl oleate, erucyl erucate, tridecyl stearate, tridecyl trimellitate and synthetic, semi-synthetic or natural mixtures of such esters, for example jojoba oil.

[0164] Other fatty ingredients that are particularly suitable for hair conditioners include polar oils, such as lecithin and fatty acid triglycerides, i.e. triglycerol esters of saturated and / or unsaturated linear or branched carboxylic acids having 8 to 24 carbon atoms, preferably 12 to 18 carbon atoms, which fatty acid triglycerides are preferably synthetic, semi-synthetic or natural oils, such as coconut oil glycerides, olive oil, sunflower oil, soybean oil, peanut oil, rapeseed oil, almond oil, palm oil, coconut oil, castor oil, hydrogenated castor oil, wheat oil, grape seed oil, macadamia seed oil, etc. ); non-polar oils, such as linear and / or branched hydrocarbons and waxes, e.g. mineral oil, petrolatum (petrolatum); paraffins, squalane and squalene, polyolefins, hydrogenated polyisobutene and isohexadecane, with polydecene being the preferred polyolefin; dialkyl ethers, e.g. dicaprylyl ether; linear or cyclic silicone oils, preferably selected from cyclomethicone (octamethylcyclotetrasiloxane; cetyl dimethicone, hexamethylcyclotrisiloxane, polydimethylsiloxane, poly(methylphenylsiloxane), etc., and mixtures thereof.

[0165] Other fatty ingredients that can be advantageously incorporated into the cosmetic composition are isoeikosane; neopentyl glycol diheptanoate; propylene glycol dicaprylate / caprate; caprylic / capric / diglycerylsuccinate; butylene glycol caprylat / caprate; alkyl lactate (C12,13); dialkyl tartrate (C12,13); triisostearin; dipentaerythrityl hexacaprylate / caprate; propylene glycol monoisostearate; tricaprylin; dimethyl isosorbide. It is particularly advantageous to use mixtures of C12-15 alkyl benzoate and 2-ethylhexyl isostearate, mixtures of C12-15 alkyl benzoate and isotridecyl isononanoate and mixtures of C12-15 alkyl benzoate, 2-ethylhexyl isostearate and isotridecyl isononanoate.

[0166] The oily phase of the cosmetic composition may also include natural vegetable or animal waxes, such as beeswax, china wax, bumblebee wax and other insect waxes, as well as shea butter and cocoa butter.

[0167] Suitable silicone oils are, for example, dimethylpolysiloxane, diethylpolysiloxane, diphenylpolysiloxane, cyclic siloxane, poly(methylphenylsiloxane) and amino-, fatty acid-, alcohol-, polyether-, epoxy-, fluorine-, glycoside- and / or alkyl-modified silicone compounds that are liquid or solid at room temperature, and mixtures thereof. The number-average molecular weight of dimethicone and poly(methylphenylsiloxane) is preferably in the range of 100 to 150000 g / mol. Preferred cyclic siloxanes contain 4-8 membered rings, which are commercially available, for example, as cyclomethicone.

[0168] In one advantageous embodiment, the cosmetic composition further comprises a phosphate ester emulsifier. Among the preferred phosphate ester emulsifiers are C8-10 alkyl ethyl phosphate, C9-15 alkyl phosphate, ceteareth-2 phosphate, ceteareth-5 phosphate, ceteth-8 phosphate, ceteth-10 phosphate, cetyl phosphate, (C6-10) pareth-4 phosphate, (C12-15) pareth-2 phosphate, (C12-15) pareth-3 phosphate, DEA-ceteareth-2 phosphate, DEA-cetyl phosphate, DEA-oleth-3 phosphate, potassium cetyl phosphate, Deceth-4 phosphate, Deceth-6 phosphate, and Trilaureth-4 phosphate. A specific phosphate ester emulsifier is, for example, potassium cetyl phosphate, available as Amphisol® K from DSM Nutritional Products Ltd Kaiseraugst.

[0169] The cosmetic compositions may further comprise cosmetic carriers, excipients and diluents, as well as additives and active ingredients commonly used in the skin care industry that are suitable for use in cosmetic compositions, such as, but not limited to, those listed in the International Cosmetic Ingredient Dictionary & Handbook by the Personal Care Product Council (http: / / www.personalcarecouncil.org / ), available online at INFO BASE (http: / / online.personalcarecouncil.org / jsp / Home.jsp).

[0170] Such possible cosmetic composition ingredients are in particular preservatives, antioxidants, fatty substances / oils, thickeners, emollients, light screening agents, moisturizers, fragrances, surfactant auxiliaries, fillers, sequestering agents, cationic, nonionic or amphoteric polymers or mixtures thereof, acidifying or basifying agents, viscosity modifiers, etc., which improve performance and / or consumer acceptability, as well as natural hair nutrients such as botanical substances, fruit extracts, sugar derivatives and / or amino acids or any other ingredients that are usually incorporated into cosmetic compositions. The necessary amounts of auxiliaries and additives can be easily selected by the person skilled in the art based on the desired product and are illustrated, but not limited to, in the examples.

[0171] The cosmetic composition preferably has a pH in the range of 3 to 10, preferably in the range of 4 to 8, and most preferably in the range of 4 to 7.5. The pH can be easily adjusted, if necessary, using a suitable acid, such as citric acid, or a base, such as NaOH, according to standard methods in the art.

[0172] In one embodiment, the composition is sulfate-free.

[0173] As used herein, the term "free", e.g., "sulfate-free", is used to mean that the respective substance is present in an amount of less than 0.5% by weight, particularly less than 0.1% by weight, more particularly less than 0.05% by weight, based on the weight of the composition. Preferably, "free" means that the respective substance is completely absent from the composition.

[0174] The cosmetic composition is preferably a topical composition.

[0175] The term "topical" as used herein is understood to mean external application to keratinous materials, in particular the skin, scalp, eyelashes, eyebrows, nails, mucous membranes and hair, preferably the skin.

[0176] Since a topical composition is intended for topical application, it is fully understood that it comprises a physiologically acceptable medium, i.e. a medium that is compatible with the skin, mucous membranes and keratinous materials such as keratinous fibers. In particular, a physiologically acceptable medium is a cosmetically acceptable carrier.

[0177] The term "cosmetically acceptable carrier" refers to any carrier and / or excipient and / or diluent conventionally used in cosmetic compositions, especially sun protection products.

[0178] Preferably, the cosmetic composition is a skin care formulation, a decorative formulation or a functional formulation.

[0179] Examples of skin care formulations are, in particular, photoprotection formulations, anti-aging formulations, formulations for treating photoaging, body oils, body lotions, body gels, treatment creams, skin protective ointments, skin powders, moisturizing gels, moisturizing sprays, moisturizers for the face and / or body, skin tanning formulations (i.e. compositions for artificial / sunless tanning and / or browning of human skin), such as self-tanning creams, and formulations for skin whitening.

[0180] The cosmetic composition is preferably a skin care composition.

[0181] In the most preferred embodiment, the cosmetic composition is a sun protection composition. The sun protection composition is a photoprotective preparation (product for preventing sunburn), such as a sun protection emulsion, a sun protection lotion, a sun protection cream, a sun protection oil, a sun block or a day care cream with SPF (sun protection factor). Of particular interest are sun protection creams, sun protection lotions, sun protection emulsions and sun protection preparations.

[0182] Cosmetic compositions, particularly topical sunscreen emulsions according to the present invention, generally have a pH in the range of 3 to 10, preferably in the range of 5 to 8, and most preferably in the range of 6 to 7.5. The pH can be easily adjusted as desired using a suitable acid, such as citric acid, or a base, such as sodium hydroxide (e.g., as an aqueous solution), triethanolamine (TEA Care), tromethamine (Trizma base), and aminomethylpropanol (AMP-Ultra PC2000), according to standard methods in the art.

[0183] The amount of cosmetic composition applied to the skin is not critical and can be easily adjusted by one skilled in the art. Preferably, this amount is between 0.1 and 3 mg / cm. 2 Skin area, e.g., preferably 0.1 to 2 mg / cm 2 Skin area, most preferably 0.5-2 mg / cm 2 Selected from a range of skin

[0184] It has been shown that the above-mentioned cosmetic composition has improved water resistance. It has been shown that by adding the above-mentioned specific cellulose and the above-mentioned mixture of branched and linear saturated C15-C19 alkanes and the above-mentioned ester of fatty acid and dextrin to a cosmetic composition containing a UV filter, the water resistance of the composition is significantly improved.

[0185] Water resistance can be assessed by the change in Sun Protection Factor (SPF) upon controlled exposure to water, further details are given in the experimental section.

[0186] Another established method for evaluating water resistance is based on the change in contact angle or diameter of a water droplet on the surface, see for example Hagens R. et al., "Contact angle measurement-a reliable supportive method for screening water-resistance of ultraviolet-protecting products in vivo", Internat. J. Cosm. Sci, 2007, 29, 283-291. This method is particularly simple and fast to perform. Further details are given in the experimental section.

[0187] Thus, in a further aspect, the present invention provides a method for the preparation of a compound comprising: 1~6 Alkyl cellulose or hydroxy-C 2~6 Alkyl(C 16 Alkyl)cellulose or carboxy C 1~6 Alkyl(C 1~6 cellulose, which is an alkyl cellulose; A mixture of branched and linear saturated C15-C19 alkanes and a combination of fatty acid and dextrin esters, Use for improving the water resistance of a cosmetic composition comprising at least a UV filter; The amount of branched saturated C15-C19 alkanes in said mixture of branched and linear saturated C15-C19 alkanes is more than 80% by weight, preferably more than 90% by weight, most preferably more than 92% by weight.

[0188] The definition and selection of ingredients are as already detailed above.

[0189] [Example] The following examples are provided to further illustrate the compositions and effects of the present invention. These examples are illustrative only and are not intended to limit the scope of the present invention in any way.

[0190] The cosmetic compositions outlined in Table 1 or Table 2 were prepared according to standard methods in the art.

[0191] [Water resistance (change in SPF after exposure to water)] 1.3 mg / cm of each composition as outlined in Table 1 2 was applied to three PMMA plates (molded, HD6) and spread on the plates to obtain a homogenous layer. The plates were then allowed to dry at room temperature for 15 min. The initial in vitro SPF (Sun Protection Factor) (SPF inital The plate was then immersed in a flask filled with 4 L of water (double distilled) for 20 min, during which the water temperature was kept at 30° C. and the water was stirred with a paddle stirrer for 150 min. -1 (The plate was attached to the edge of the flask with a clothespin, with the surface coated with the composition facing into the flask). The plate was then dried at 40° C. for 30 minutes. The soaking / drying procedure was repeated one more time. After the final drying, the plate was cooled to room temperature and then washed with SPF 100. immersed The in-vitro SPF was measured as WR=[(SPF immersed / (SPF inital )] It was calculated as:

[0192] The results are shown in Table 1.

[0193] [Table 1]

[0194] The results in Table 1 show that the water resistance of the SPF of the cosmetic composition containing different UV filters (Reference Example 1) is relatively low. When the composition further contains a specific required cellulose (Reference Example 2), the water resistance is improved. The improvement is smaller than when the composition contains an ester of dextrin and fatty acid (Reference Example 3). When the composition contains a mixture of branched and linear saturated C15-C19 alkanes as well as an ester of fatty acid and dextrin and a specific required cellulose, the water resistance is significantly improved (1 vs Reference Example 1 vs Reference Example 2 vs Reference Example 3).

[0195] [Water resistance (change in droplet size on surface after exposure to water)] 1.2 mg / cm of each composition as outlined in Table 2 2 was applied to three PMMA plates (Schoenberg, 5 μm) and spread on the plates to obtain a homogenous layer. The plates were then dried at room temperature for 5 min. Afterwards, a drop of distilled water with a volume of 0.1 ml was placed in the center of the plate.

[0196] After the surface is exposed to the water droplet for 1 minute, a photograph is taken and the diameter of the water droplet is measured. The average diameter (droplet size) of the water droplets obtained from the three plates is shown in Table 2 together with the standard deviation (STD) obtained from the individual measurements.

[0197] The smaller the diameter of the water droplets, the more water resistant the cosmetic composition is.

[0198] The results in Table 2 support the findings in Table 1. The results in Table 2 show that the cosmetic composition containing different UV filters (Reference Example 4) has a relatively large diameter and therefore poor water resistance. When the composition further contains an ester of dextrin and fatty acid (Reference Example 5), the diameter of the water droplets is significantly reduced, and therefore water resistance is improved. The same is true when the specific required cellulose is added to the composition (Reference Example 4) (Reference Example 6), and therefore water resistance is also improved. When the composition contains an ester of fatty acid and dextrin and a specific required cellulose in addition to a mixture of branched and linear saturated C15-C19 alkanes, water resistance is significantly improved, as can be seen from the significantly reduced diameter of the water droplets on the surface of the composition (2 vs Reference Example 4 vs Reference Example 5 vs Reference Example 6).

[0199] [Table 2]

Claims

1. - a UV filter; a mixture of branched and linear saturated C15-C19 alkanes; - esters of fatty acids and dextrin; - C １～６ Alkyl cellulose or hydroxy-C ２～６ Alkyl (C １～６ Alkyl) cellulose or carboxy C １～６ Alkyl (C １～６ cellulose, which is an alkyl)cellulose; A cosmetic composition comprising: A cosmetic composition, wherein the amount of branched saturated C15-C19 alkane in said mixture of branched and linear saturated C15-C19 alkanes is greater than 80% by weight, preferably greater than 90% by weight, most preferably greater than 92% by weight.

2. 2. The cosmetic composition according to claim 1, characterized in that the amount of linear saturated C15-C19 alkanes in said mixture of branched and linear saturated C15-C19 alkanes is less than 10% by weight, preferably less than 8% by weight, most preferably more than 5% by weight.

3. 3. The cosmetic composition according to claim 1 or 2, characterized in that the amount of branched saturated C18 alkanes is more than 50% by weight, preferably more than 60% by weight, and even more preferably more than 70% by weight, relative to the weight of said mixture of branched and linear saturated C15-C19 alkanes.

4. 4. The cosmetic composition according to claim 1, wherein the fatty acid of the ester of fatty acid and dextrin is a C14-C18 fatty acid, in particular a linear C14-C18 fatty acid, most preferably palmitic acid.

5. 5. The cosmetic composition according to claim 1, wherein the dextrin of the ester of fatty acid and dextrin has an average degree of glycopolymerization of 3 to 20, in particular 8 to 16.

6. 6. Cosmetic composition according to any one of claims 1 to 5, characterized in that the average number of esterified hydroxyl groups of said esters of fatty acids with dextrin is greater than 2.5, preferably between 2.5 and 3.5, more preferably between 2.5 and 3.4, most preferably between 2.5 and 3.2 per glucose unit.

7. The molecular weight M of the ester of fatty acid and dextrin ｎ The cosmetic composition according to any one of claims 1 to 6, characterized in that the molecular weight of the polysaccharide is between 8000 and 16000 Da, preferably between 9000 and 13000 Da, more preferably between 10000 and 11500 Da.

8. 8. The cosmetic composition according to claim 1, wherein the UV filter is selected from the group consisting of ethylhexyl triazone, avobenzone, bisethylhexyloxyphenol methoxyphenyl triazine, 2-ethylhexyl salicylate, phenylbenzimidazole sulfonic acid, ethylhexyl methoxycinnamate, octocrylene, polysilicone-15, iscotridinol, titanium dioxide and methylene bisbenzotriazolyl tetramethylbutylphenol.

9. 9. Cosmetic composition according to any one of claims 1 to 8, characterized in that the cellulose is selected from the group consisting of methylcellulose, ethylcellulose, propylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxyethylmethylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose, carboxymethylmethylcellulose and carboxymethylethylcellulose, in particular ethylcellulose.

10. 10. The cosmetic composition according to any one of claims 1 to 9, characterized in that the amount of cellulose is in the range of 0.01 to 4.0% by weight, in particular in the range of 0.1 to 3.0% by weight, preferably in the range of 0.3 to 2.5% by weight, based on the weight of the cosmetic composition.

11. 11. The cosmetic composition according to any one of the preceding claims, characterized in that the amount of said mixture of branched and linear saturated C15-C19 alkanes is in the range of 0.5 to 12.0% by weight, in particular in the range of 1.0 to 10.0% by weight, more preferably in the range of 1.5 to 8.0% by weight, preferably in the range of 2.0 to 6.0% by weight, based on the weight of the cosmetic composition.

12. 12. The cosmetic composition according to any one of the preceding claims, characterized in that the amount of said ester of a fatty acid and of a dextrin is in the range of 0.3 to 8.0% by weight, in particular in the range of 0.6 to 7.0% by weight, more preferably in the range of 1.0 to 6.0% by weight, in particular in the range of 1.5 to 5.0% by weight, based on the weight of the cosmetic composition.

13. A cosmetic composition according to any one of claims 1 to 12, characterized in that it comprises water and is in the form of an emulsion.

14. A cosmetic composition according to any one of claims 1 to 13, characterized in that the composition has a sun protection factor (SPF) of 10 or more, preferably 20 or more, more preferably 30 or more.

15. C １～６ Alkyl cellulose or hydroxy-C ２～６ Alkyl (C １６ Alkyl) cellulose or carboxy C １～６ Alkyl (C １～６ cellulose, which is a cellulose copolymer of 1,2-dialkylphenyl ether; A combination of; Use for improving the water resistance of a cosmetic composition comprising at least a UV filter, comprising: The amount of branched saturated C15-C19 alkanes in the mixture of branched and linear saturated C15-C19 alkanes is greater than 80% by weight, preferably greater than 90% by weight, most preferably greater than 92% by weight.

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