Personal care compositions comprising lactic acid esters

Abstract

The present invention relates to a sunscreen or daily care composition with photoprotection, comprising: (i) at least one ester of lactic acid; (ii) at least one buffer system; and (iii) at least one UV filter, wherein the pH of the composition is within the range of 5.5 to 8.0. The present invention furthermore relates to the use of at least one ester of lactic acid for improving stability of a sunscreen or daily care composition with photoprotection comprising UV filters, for improving solubility of UV filters in a sunscreen or daily care composition, for improving sensory performance, improving spreadability, reducing stickiness and / or reducing oiliness.

Description

[0001] Personal care compositions comprising lactic acid esters

[0002] Field of the invention

[0003] The present invention relates to a sunscreen or daily care composition with photoprotection, comprising: (i) at least one ester of lactic acid; (ii) at least one buffer system; and (iii) at least one UV filter, wherein the pH of the composition is within the range of 5.5 to 8.0. The present invention furthermore relates to the use of a combination of at least one ester of lactic acid and at least one buffer system for improving stability of a sunscreen or daily care composition with photoprotection comprising at least one UV filter, and to the use of a combination of at least one ester of lactic acid and at least one buffer system for improving solubility of at least one UV filter in a sunscreen or daily care composition.

[0004] Background of the invention

[0005] UV radiation causes harmful effects on the human skin. Beside the acute effect of sunburn of the skin, UV radiation is also known to increase the risk of skin cancer. Furthermore, long time exposure to UV-A and UV-B light can cause phototoxic and photo allergenic reactions on the skin and can accelerate skin aging.

[0006] To protect the human skin from UV radiation, various sun protecting UV filters (also referred to as UV absorbers) exist including UV-A filter, UV-B filter and broadband filters. These filters are added to sunscreen or daily care compositions. The UV filters are either organic or inorganic, particulate or non-particulate compounds, of which all have an absorption efficacy in the UV-light range. In general, UV light reaching the earth surface can be divided into UV-A radiation and UV-B radiation. Depending on the position of the absorption maxima, UV-filters are divided into UV-A and UV-B filters. In case an UV-filter absorbs both, UV-A and UV-B light, it is referred to as a broadband absorber. Since broadband UV filters provide protection against UVA and UVB radiation it is preferred to add these kind of UV filters into sunscreen or daily care composition. However, there is still the need of improved formulations that provide efficient and safe UV protection.

[0007] Particularly, regarding user requirements, it appears that sunscreen or daily care compositions having a satisfying stability, especially over periods of prolonged storage and / or at elevated temperatures, i.e., temperatures above room temperature (20 to 25 °C), are preferred.

[0008] Against this background, there is an ongoing need for sunscreen or daily care compositions for the daily use, which provide efficient sun protection and meet the consumer’s demands with respect to protection performance and overall convenience, particularly with respect to stability. In particular, it was an object of the present invention to provide efficient and stable sunscreen or daily care compositions.

[0009] It has surprisingly been found that improved stability can be achieved by the sunscreen or daily care composition with photoprotection according to the present invention, particularly when comprising one or more broadband absorbers. Particularly, it has furthermore been found that the combination of esters of lactic acid with a buffer system improve overall solubility of solid UV filters in a sufficiently stable sunscreen or daily care composition with photoprotection. Summary of the invention

[0010] Thus, in a first aspect, the present invention provides a sunscreen or daily care composition with photoprotection, comprising:

[0011] (i) at least one ester of lactic acid, preferably at least one ester of lactic acid in an amount of from 1 to 20 wt.-% based on the total weight of the composition, and preferably comprising lauryl lactate;

[0012] (ii) at least one buffer system;

[0013] (iii) at least one UV filter, preferably at least one organic UV filter; wherein the pH of the composition is within the range of 5.5 to 8.0.

[0014] In some embodiments, the pH of the composition is maintained within the range of above 5.5 to 8.0 over a storage period of at least one week at a temperature of about 25 °C or at a temperature of about 40°C. In some embodiments, the pH is maintained within the given range over a period of storage of at least two weeks, preferably at least four weeks, preferably one year, preferably 2 years.

[0015] In some embodiments, the at least one ester of lactic acid is selected from the group consisting of oleyl lactate, lauryl lactate, cetyl lactate, myristyl lactate, glyceryl lactate, tridecyl lactate, stearyl lactate, isostearyl lactate, and behenyl lactate, preferably lauryl lactate.

[0016] In some embodiments, the at least one ester of lactic acid is present in an amount of about 1 to 20 wt.-%, preferably about 2 to 15 wt.-%, more preferably about 3 to 10 wt.-%, based on the total weight of the composition.

[0017] In some embodiments, the buffer system is selected from the group consisting of a phosphate buffer system, a carbonate buffer system, an acetate buffer system, a citrate buffer system, an ammonium buffer system, a borate buffer system, a triethanolamine buffer system, and a tartrate buffer system, preferably from a phosphate buffer system and a carbonate buffer system.

[0018] In some embodiments, the buffer system (i.e. the totality of the buffer substances used, typically a combination of acids, bases and / or salts), is comprised in the compositions in an amount of about 0.2 to 4 wt.-%, preferably in an amount of about 0.3 to 3 wt.-%, more preferably in an amount of about 0.4 to 2 wt.-%, based on the total weight of the composition.

[0019] In some embodiments, the at least one UV filter is comprised in the sunscreen or daily care composition with photoprotection in an amount of 5 to 40 wt.-%, preferably of 8 to 35 wt.-%, more preferably of 9 to 30 wt.-% or of 9 to 35 wt.-%, still more preferably of 9 to 25 wt.-%, and in particular of 9 to 20 wt.-%, based on the total weight of the composition.

[0020] In some embodiments, the at least one UV filter comprises

[0021] (1 ) a UV filter that is solid at 25°C; or

[0022] (2) a UV filter that is soluble in at least one cosmetic oil; or (3) an organic UV filter; or

[0023] (4) a particulate UV filter.

[0024] In various embodiments, the at least one UV filter is solid at 25°C and soluble in at least one cosmetic oil.

[0025] In various preferred embodiments, the at least one UV filter is an organic UV filter, is solid at 25°C and is soluble in at least one cosmetic oil.

[0026] In some embodiments, the at least one UV filter comprises at least one UVA filter, preferably selected from the group consisting of disodium phenyl dibenzimidazole tetrasulfonate, hexyl 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoate (INCI diethylamino hydroxybenzoyl hexyl benzoate), methoxypropylamino cyclohexenylidene ethoxyethylcyanoacetate (MCE), 1-(4-(1 ,1-dimethylethyl)phenyl)-3-(4-methoxyphenyl)propane-1 ,3-dione (INCI butyl methoxydibenzoylmethane), terephthalylidene dicamphor sulfonic acid, and combinations thereof; and / or at least one UVB filter, preferably selected from the group consisting of 4,4’,4”-(1 ,3,5-triazine-2,4,6- triyltriimino)tris-benzoic acid-tris(2-ethylhexyl)ester (INCI ethylhexyl triazone), 4,4’-[[6-[[4-[[(1 ,1- dimethylethyl)amino]carbonyl]phenyl]amino]-1 ,3,5-triazin-2,4-diyl]3iamino]bis-benzoic acid-bis(2- ethylhexyl)ester (INCI diethylhexyl butamido triazone), phenylbenzimidazole sulfonic acid, , and combinations thereof; and / or at least one broadband UV filter, preferably selected from the group consisting of bisethylhexyloxyphenol methoxyphenyl triazine (INCI bis-ethylhexyloxyphenol methoxyphenyl triazine), 2-(2H- benzotriazol-2-yl)-6-[(2-ethylhexyloxy)methyl]-4-methylphenol, 2-(2H-benzotriazol-2-yl)-4-methyl-6-[2- methyl-3-[1 ,3,3,3-tetramethyl-1-[(trimethylsilyl)oxy]-1-disiloxanyl]propyl]phenol (INCI drometrizole trisiloxane), 2,2'-methylenbis[6-(2H-benzotriazol-2-yl)-4-(1 ,1 ,3,3-tetramethylbutyl)phenol] (INCI methylene Bis-benzotriazolyl tetramethylbutylphenol), phenylene bis-diphenyltriazine (PBDT), and combinations thereof; and / or at least one organic particulate UV filter, preferably selected from the group consisting of 2,2’- methylene bis[6-(2H-benzotriazol-2-yl)-4-(1 ,1 ,3,3-tetramethylbutyl)phenol] (INCI methylene bis- benzotriazolyl tetramethylbutylphenol), 2,4,6-tris(biphenyl-4-yl)-1 ,3,5-triazine (INCI tris-biphenyl triazine), 1 ,1 ’-(1 ,4-piperazinediyl)bis[1-[2-[4-(diethylamino)-2-hydroxybenzoyl]phenyl]-methanone (INCI bis- (diethylaminohydroxybenzoyl benzoyl) piperazine), 5,6,5’,6’-tetraphenyl-3-3’-(1 ,4-phenylene)bis(1 ,2,4- triazine) (INCI phenylene bis-diphenyltriazine, PBDT), micronized 1 ,4-di(benzoxazole-2'-yl)benzene and combinations thereof; and / or at least one inorganic UV filter, preferably selected from the group consisting of titanium dioxide, zinc oxide, iron oxide, cerium oxide and mixtures thereof.

[0027] In various embodiments, the sunscreen or daily care composition with photoprotection comprises at least one UV filter selected from bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT), diethylamino hydroxybenzoyl hexyl benzoate (DHHB), methoxypropylamino cyclohexenylidene ethoxyethylcyanoacetate (MCE), butyl methoxydibenzoylmethane (BMDBM), ethylhexyl triazone (EHT), methylene bis-benzotriazolyl tetramethylbutylphenol (MBBT), tris-biphenyl triazine (TBPT) and any combination of two or more thereof.

[0028] In some embodiments, at least one broadband UV filter, for example BEMT, is comprised in the sunscreen or daily care composition, preferably in an amount of from 0.5 to 10 % by weight, based on the total weight of the composition.

[0029] In some embodiments, the composition is free of at least one or more of, parabenes, phenoxyethanol, and organic UV filter compounds selected from the group of homomenthyl salicylate, ethylhexyl methoxycinnamate, octocrylene, and ethylhexyl salicylate.

[0030] In some embodiments, the composition further comprises at least one additive, preferably selected from the group consisting of emulsifiers, emollients, viscosity regulators (thickeners), stabilizers, sensory enhancers, humectants, film formers, UV scattering compounds, adjuvants, preservatives, perfumes, and combinations thereof.

[0031] In another aspect, provided herein is the use of at least one lactic acid ester or a combination of at least one ester of lactic acid and at least one buffer system for improving stability of a sunscreen or daily care composition with photoprotection comprising at least one UV filter, preferably a UV filter solid at 25°C and / or soluble in at least one cosmetic oil and / or organic UV filter and / or 1 ,3,5-triazine-based UV filter.

[0032] In another aspect, provided herein is the use of at least one lactic acid ester or a combination of at least one ester of lactic acid and at least one buffer system for improving sensory performance and / or spreadability and / or for decreasing stickiness and / or for reducing oiliness of a sunscreen or daily care composition with photoprotection comprising at least one UV filter, preferably a UV filter solid at 25°C and / or soluble in at least one cosmetic oil and / or organic UV filter and / or 1 ,3,5-triazine-based UV filter.

[0033] In another aspect, provided herein is also the use of at least one lactic acid ester or a combination of at least one ester of lactic acid and at least one buffer system for improving solubility of at least one UV filter, preferably UV filter solid at 25°C and / or soluble in at least one cosmetic oil and / or 1 ,3,5-triazine-based UV filter, in a sunscreen or daily care composition with photoprotection.

[0034] Brief description of the drawings

[0035] Figure 1 depicts the results in terms of pH stability obtained for formulations comprising lauryl lactate without buffer (control, formulation A in Table 1 of the experimental section), lauryl lactate and phosphate buffer (according to the invention, formulation B in Table 1 of the experimental section), lauryl lactate and borate buffer (according to the invention, formulation C in Table 1 of the experimental section), or lauryl lactate and carbonate buffer (according to the invention, formulation D in Table 1 of the experimental section) when stored at a temperature of 25 °C. Figure 2 depicts the results in terms of pH stability obtained for formulations comprising lauryl lactate without buffer (control, formulation A in Table 1 of the experimental section), lauryl lactate and phosphate buffer (according to the invention, formulation B in Table 1 of the experimental section), lauryl lactate and borate buffer (according to the invention, formulation C in Table 1 of the experimental section), or lauryl lactate and carbonate buffer (according to the invention, formulation D in Table 1 of the experimental section) when stored at a temperature of 40 °C.

[0036] Figure 3 depicts the results in terms of pH stability obtained for formulations comprising lauryl lactate without buffer (control, formulation E in Table 2 of the experimental section), lauryl lactate and phosphate buffer (according to the invention, formulation F in Table 2 of the experimental section), or lauryl lactate and carbonate buffer (according to the invention, formulation G in Table 2 of the experimental section) when stored at a temperature of 25 °C.

[0037] Figure 4 depicts the results in terms of pH stability obtained for formulations comprising lauryl lactate without buffer (control, formulation E in Table 2 of the experimental section), lauryl lactate and phosphate buffer (according to the invention, formulation F in Table 2 of the experimental section), or lauryl lactate and carbonate buffer (according to the invention, formulation G in Table 2 of the experimental section) when stored at a temperature of 40 °C.

[0038] Detailed description

[0039] Before describing preferred embodiments of the present invention in detail, definitions important for understanding the present invention are given.

[0040] As used in this specification and in the appended claims, the singular forms of "a" and "an" also include the respective plurals unless the context clearly dictates otherwise.

[0041] In the context of the present invention, the terms "about" and "approximately" denote an interval of accuracy that a person skilled in the art will understand to still ensure the technical effect of the feature in question. The term typically indicates a deviation from the indicated numerical value of ±20%, preferably ±15%, more preferably ±10%, and even more preferably ±5%.

[0042] It is to be understood that the term "comprising" is not limiting. For the purposes of the present invention, the term "consisting of is considered to be a preferred embodiment of the term "comprising of. If hereinafter a group is defined to comprise at least a certain number of embodiments, this is meant to also encompass a group, which preferably consists of these embodiments only.

[0043] Furthermore, the terms "first", "second", "third" or "(I)", "(H)", "(iii)", "(iv)" etc. and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and that the embodiments of the invention described herein are capable of operation in other sequences than described or illustrated herein. As used herein the term “free of” in the context that the composition of the present invention is free of a specific compound or group of compounds, which may be combined under a collective term, means that the composition does not comprise said compound or group of compounds in an amount of more than 0.8% by weight, based on the total weight of the composition. Furthermore, it is preferred that the composition according to the present invention does not comprise said compounds or group of compounds in an amount of more than 0.5% by weight, preferably the composition does not comprise said compounds or group of compounds at all. The same definition is applied for the term “does not comprise”. Furthermore, it is to be understood that the term “free of” or “does not comprise”, in case the composition does not comprise a compound X and a compound Y means that the compositions must be free of both compounds X and Y. In other words, the composition may not contain any compound selected from X and Y.

[0044] When referring to compositions and the weight percent of the therein comprised ingredients it is to be understood that according to the present invention the overall amount of ingredients does not exceed 100% (± 1 % due to rounding).

[0045] It is to be understood that this invention is not limited to the particular methodology, protocols, reagents etc. described herein as these may vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention that will be limited only by the appended claims. Unless defined otherwise, all technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art.

[0046] The term “sunscreen composition” refers to any topical product, which absorbs and may further reflect certain parts of UV radiation. Thus, the term “sunscreen composition” is to be understood as not only including sunscreen compositions, but also any cosmetic compositions that provide UV protection. The term “topical product” refers to a product that is applied to the skin and can refer, e.g., to sprays, lotions, creams, oils, or gels. The sunscreen composition may comprise one or more active UV filtering agents, e.g., organic or inorganic UV filters, as well as other ingredients or additives, e.g., emulsifiers, emollients, viscosity regulators, stabilizers, preservatives, or perfumes.

[0047] A sunscreen composition of the present invention may inter alia be formulated as a water-in-oil (W / O) or an oil-in-water (O / W) dispersion, a vesicular dispersion of an ionic or nonionic amphiphilic lipid, a gel, a solid stick or an aerosol formulation.

[0048] The term “daily care composition” refers to any topical product which is intended to be used daily without or with a UV protection. In case UV protection is included, it absorbs and may further reflect and scatter certain parts of UV radiation and is used as an everyday care product for the human body, e.g., for face or body, and is, in the context of the present invention, referred to as a “daily care composition with photoprotection”. The daily care composition with photoprotection of the present invention typically comprises one or more active agents, e.g., organic and / or inorganic UV filters, as well as other ingredients or additives, e.g., emulsifiers, emollients, viscosity regulators, stabilizers, sensory enhancers, humectants, film formers, UV scattering compounds, adjuvants, preservatives, or fragrances. Suitable daily care composition with photoprotection according to the present invention are, e.g., leave-on face and body care products. Suitable leave-on products for face and body are, e.g., decorative preparations (or make-up) and skin care preparations.

[0049] Suitable decorative preparations are, e.g., facial make-up in the form of day creams or powder creams, face powder (loose or pressed), dry and moist make-up rouge or cream make-up, eye-care preparations, e.g. eyeshadow preparations, mascara, eyeliner, eye creams or eye-fix creams; lip-care preparations, e.g. lipsticks, rouge lip gloss, lip contour pencils, nail varnishes, and suntan lotions.

[0050] Suitable skin care preparations are, e.g., moisturizing, refining, and lifting preparations. The cited daily care compositions can be in the form of creams, ointments, pastes, foams, gels, lotions, powders, make-ups, sprays, sticks or aerosols.

[0051] The term “UV-filter” as used herein refers to organic or inorganic compounds, which can absorb may further reflect and scatter UUV radiation caused by sunlight. UV-filter can be classified based on their UV protection curve as UV-A, UV-B or broadband filters. Preferably, the term “UV filter” comprises or consists of any UV filter as defined in the Annex VI (version of 11.1 1.2022) of the Regulation (EC) No 1223 / 2009 of the European Parliament and of the Council. The term “1 ,3,5-triazine UV filters”, as used herein, relates to UV filters that comprise the 1 ,3,5-triazine chemical moiety in their structure. Examples of such compounds are well-known and widely used in the art.

[0052] The definition of “broadband” protection (also referred to as broad-spectrum or broad protection) may be based for example on the “critical wavelength” or the UVA-PF (UVA protection factor). For broadband coverage, UV-B and UV-A protection must be provided. According to the US requirements, a critical wavelength of at least 370 nm is required for achieving broad spectrum protection. Furthermore, it is recommended by the European Commission that all sunscreens should have an UVA protection factor, which is at least one third of the labelled sun protection factor (SPF), e.g., if the sunscreen composition has an SPF of 30 the UVA protection factor has to be at least 10.

[0053] The term “critical wavelength” is defined as the wavelength at which the area under the UV protection curve (% protection versus wavelength) represents 90 % of the total area under the curve in the UV region (290- 400 nm). For example, a critical wavelength of 370 nm indicates that the protection of the sunscreen composition is not limited to the wavelengths of UV-B, i.e., wavelengths from 290-320 nm, but extends to 370 nm in such a way that 90 % of the total area under the protective curve in the UV region are reached at 370 nm.

[0054] The term “sun protection factor (SPF)” as used herein indicates how well the skin is protected by a sunscreen composition from an erythema (sunburn) induced mainly from UV-B radiation. In particular, the factor indicates how much longer the protected skin may be exposed to the sun without getting a sunburn in comparison to untreated skin. For example, if a sunscreen composition with an SPF of 15 is evenly applied to the skin of a person usually getting a sunburn after 10 minutes in the sun, the sunscreen allows the skilled person to stay in the sun 15 times longer. In other words, SPF 15 means that 1 / 15 of the burning UV radiation will reach the skin, assuming sunscreen is applied evenly at a thick dosage of 2 milligrams per square centimeter (mg / cm2).

[0055] Water soluble UV filters have a solubility in water of at least 2 % by weight, preferably at least 3 % by weight, more preferably at least 5 % by weight. If no indicated otherwise, all solubilities given herein are at standard conditions, i.e. room temperature (25°C) and atmospheric pressure (1013 mbar).

[0056] Oil soluble UV filters or “UV filters soluble in at least one cosmetic oil” have a solubility in common cosmetic oils, such as C12-C15-alkyl benzoate, dibutyl adipate, diisopropyl sebacate, phenethyl benzoate, coco- caprylate ( / caprate), propylheptyl caprylate, caprylic / capric triglyceride, cocoglycerides, propylene glycol dicaprylate / dicaprate, butylene glycol dicaprylate / dicaprate, triethyl citrate, isopropyl myristate, isopropyl palmitate, phenox, ethyl caprylate isopropyl lauroyl sarcosinate or dicaprylyl carbonate of at least 2 % by weight, preferably at least 5 % by weight, more preferably at least 7 % by weight.

[0057] If a UV filter is defined as being “oil-soluble” or “soluble in at least one cosmetic oil” herein, this means that it has a solubility of at least 2% by weight in any one or more of the afore-mentioned cosmetic oils, i.e. in one or more of C12-C15-alkyl benzoate, dibutyl adipate, diisopropyl sebacate, phenethyl benzoate, coco- caprylate ( / caprate), propylheptyl caprylate, caprylic / capric triglyceride, cocoglycerides, propylene glycol dicaprylate / dicaprate, butylene glycol dicaprylate / dicaprate, triethyl citrate, isopropyl myristate, isopropyl palmitate, phenox, ethyl caprylate isopropyl lauroyl sarcosinate, and dicaprylyl carbonate. In some embodiments, it may have the given solubility in all of the listed cosmetic oils.

[0058] The term “insoluble, particulate organic UV filter” refers to UV filters that are not soluble in water and not in cosmetic oils. This may mean that their solubility in water and the cosmetic oils mentioned above is below 2 % by weight, for example below 1 % by weight.

[0059] The term “sensory performance”, as used herein, relates to the sensory profile of a formulation upon application onto the user’s skin, for example as evaluated by a panel of test subjects against a reference formulation. The sensory profile includes a variety of factors that are typically considered by users, such as rheology, spreadability, stickiness, whitening, skin absorption, oiliness, waxiness, overall acceptance and the like.

[0060] “Spreadability”, as used herein, relates to the ease of applying the formulation onto the skin and spreading it over the skin in form of a thin film by the user. It is generally preferred by users that the formulation can be easily spread over the skin surface.

[0061] “Stickiness”, as used herein, relates to the extent of stickiness of the formulation once applied can, for example, be tested by measuring the sand adhesion of a defined sand amount applied on a substrate covered with sunscreen and checking how much sand stays on the substrate after a defined shaking. The substrate can be in vivo (e.g. human skin forearm) or in vitro (PMMA plates). It is generally desired by users, that stickiness is as low as possible after application.

[0062] “Oiliness”, as used herein, relates to the quality of being oily or greasy and the related sensory perception by a user. It can, for example, be tested by applying an oil absorbing sheet on a defined skin area covered with a defined amount of sunscreen and observing the level of oil absorption by the sheet (e.g. visually).

[0063] It has surprisingly been found by the inventors of the present invention that the addition of at least one ester of lactic acid in combination with at least one buffer system as defined herein enhances the solubility and performance of UV filters contained in said composition, while at the same time providing for enhanced stability of the sunscreen or daily care composition with photoprotection.

[0064] Accordingly, in a first aspect, the present invention provides a sunscreen or daily care composition with photoprotection, comprising:

[0065] (i) at least one ester of lactic acid;

[0066] (ii) at least one buffer system; and

[0067] (Hi) at least one UV filter; wherein the pH of the composition is within the range of 5.5 to 8.0, such as at a pH of 5.5, 5.6, 5.7, 5.8, 5.9, 6.0, 6.1 , 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7.0, 7.1 , 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, or 8.0.

[0068] The pH of the formulations can be measured by any means known and available to those skilled in the art. If not indicated otherwise, the pH of the formulations as such (e.g. as o / w emulsions) filled and stored in a glass bottle was measured herein potentiometrically with a pH meter equipped with a glass electrode (Mettler-Toledo) at 20°C

[0069] In some embodiments, the pH of the composition is stably within the range of 5.5 to 8.0, such as at a pH of 5,5, 5.6, 5.7, 5.8, 5.9, 6.0, 6.1 , 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7.0, 7.1 , 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, or 8.0, when stored at a temperature of about 25 °C, such as maintained within the range of 7.0 to 8.0 when stored at a temperature of about 25 °C. The pH range may be 5.5 to 8.0 or 5.6 to 7.9, or 5.7 to 7.8 or 5.8 to 7.7 or 5.9 to 7.6 or 6.0 to 7.5 or 6.1 to 7.5 or 6.2 to 7.5 or 6.3 to 7.5 or 6.4 to 7.5 or 6.5 to 7.5 or 5.5 to 7.0 or 5.5 to 6.5.

[0070] In the context of the present invention, the phrase “the pH of the composition is stably within the pH range of’ is meant to refer to the maintaining of the pH value within the respective range.

[0071] In some embodiments, the pH of the sunscreen or daily care composition with photoprotection according to the present invention is stable within the range of 7.0 to 8.0, when stored at a temperature of about 25 °C. In some embodiments, the pH of the composition is stably within the range of above 5.0 to 8.5, for instance at a pH of 5.0, 5.1 , 5.2, 5.3, 5.4, 5,5, 5.6, 5.7, 5.8, 5.9, 6.0,6.1 , 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7.0, 7.1 , 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, 8.0, 8.1 , 8.2, 8.3, 8.4, or 8.5, such as within the range of 6.5 to 8.5, when stored at a temperature of about 40 °C.

[0072] “Storing” or “storage” of a composition according to the present invention refers to the keeping of the respective composition after production / preparation thereof, such as in packaged form, for instance in bulk containers or consumer-appropriate containers including (glass) bottles, tubes, flasks, etc., wherein said keeping includes transport of said composition and further includes the keeping of said composition in its respective package or container for further use by the consumer after initial opening of said package or container, such as after first-time use.

[0073] In some particular embodiments, the pH of the composition is maintained stably within the above given ranges or at the given value, e.g. within the range of 6.5 to 8.0, over a storage period of at least one week, preferably at least two weeks, more preferably at least three weeks, even more preferably at least 4, 5, 6, 7, 8, 9, 10, 11 , 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 , 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 , 32, 33, 34, 35, 36, 37, 38, 39, 40, 41 , 42, 43, 44, 45, 46, 47, 48, 49, 50, 51 or 52, 60, 80, 90, 100 or 104 weeks, in particular at 25°C and / or at 40°C or at any temperature in the range between 20 and 40°C, including temperatures that vary within this range over the storage period.

[0074] In the context of the present invention, the term “ester of lactic acid” refers to a compound formed in an esterification reaction of lactic acid and an alcohol compound (ROH) in a condensation reaction, wherein R may be generally selected from (hetero)alkyl, (hetero)aryl, (hetero)alkyl (hetero)aryl, and (hetero)aryl (hetero)alkyl, preferably from alkyl.

[0075] The term “alkyl” refers to monovalent straight chain, branched chain or cyclic hydrocarbon radicals comprising 1 to 30 carbon atoms, preferably straight chain or branched chain radicals comprising 5 to 30 carbon atoms. The term “alkyl” further includes both substituted and unsubstituted alkyl, wherein “substituted” means that one or more hydrogen atoms are replaced with one or more chemical groups selected from -OH and -COOH. An alkyl, as herein defined, may be saturated or unsaturated. The term “heteroalkyl” refers to alkyl, as herein defined, wherein at least one carbon atom is replaced by nitrogen, sulphur or oxygen. Exemplary alkyl, as herein defined, include methyl, ethyl, n-propyl, isopropyl, allyl, n- butyl, isobutyl, sec-butyl, tert-butyl, 1-butenyl, n-pentyl, isopentyl, n-hexyl, 2-ethylhexyl, cyclohexyl, n- heptyl, n-octyl, n-nonyl, n-decyl, n-undecanyl, n-dodecanyl, n-tetradecanyl, n-hexadecanyl, n- heptadecanyl, n-octadecanyl, n-eicosanyl, n-docosanyl, and n-tetracosanyl.

[0076] The term “aryl” refers to a hydrocarbon radical having one or more polyunsaturated carbon rings having aromatic character, (e.g., 4n + 2 delocalized electrons) and comprising 6 up to about 14 carbon atoms, wherein the radical is located on a carbon of the aromatic ring. Exemplary aryl includes phenyl, naphthyl, and indenyl. The term “heteroaryl” refers to aryl, as herein defined, wherein at least one carbon atom is replaced by nitrogen, sulphur or oxygen. In various embodiments, R is selected from alkyl and aryl, preferably alkyl, as herein defined. In various embodiments, R is saturated or unsaturated, straight chain or branched chain alkyl and comprises 5 to 25 carbon atoms, preferably 8 to 22 carbon atoms.

[0077] In various embodiments, esters of lactic acid are selected from the group consisting of methyl lactate, ethyl lactate, isopropyl lactate, butyl lactate, isopropyl myristate lactate, oleyl lactate, lauryl lactate, cetyl lactate, myristyl lactate, glyceryl lactate, tridecyl lactate, stearyl lactate, isostearyl lactate, and behenyl lactate, and glycol lactates such as propylene glycol lactate. In preferred embodiments, esters of lactic acid are selected from the group consisting of oleyl lactate, lauryl lactate, cetyl lactate, myristyl lactate, glyceryl lactate, tridecyl lactate, stearyl lactate, isostearyl lactate, and behenyl lactate. In some embodiments, the ester of lactic acid is selected from the group consisting of oleyl lactate, lauryl lactate, and myristyl lactate, preferably lauryl lactate. Mixtures of any of the aforementioned are also envisaged. Particularly preferred is lauryl lactate. In some embodiments, the lactic acid ester is not myristyl lactate or glyceryl lactate.

[0078] In various embodiments, the at least one ester of lactic acid is present in an amount of about 1 to 20 wt.- %, such as in an amount of 1 , 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 , 12, 13, 14, 15, 16, 17, 18, 19 or 20 wt.-%, preferably about 2 to 15 wt.-%, more preferably about 3 to 10 wt.-%, based on the total weight of the composition. Preferred lower limits are 1 .0, 1 .2, 1 .3, 1 .4, 1 .5, 1 .6, 1 .7, 1 .8, 1 .9, 2.0, 2.1 , 2.2, 2.3, 2.4, or 2.5 wt.-%. Preferred upper limits are 20, 19, 18, 17, 16, or 15 wt.-%. Ranges thus include 1.0 to 20 wt.-%, 1.2 to 15 wt.-%, 1.5 to 15 wt.-%, 2.0 to 15 wt.-%, 1.5 to 10 wt.-%, 2.0 to 10 wt.-%, 2.5 to 7.5 wt.-% or 3.0 to 6.0 wt.-%. In various embodiments, the amount of lactic acids ester in the composition, preferably of lauryl lactate, is at least 1 .2 wt.-%, preferably at least 1 .5 wt.-%.

[0079] In the context of the present invention, the term “buffer system” refers to a combination of a weak acid and its conjugate base or to a combination of a weak base and its conjugate acid. In various embodiments, the buffer system is selected from the group consisting of a phosphate buffer system (such as disodium hydrogen phosphate / monosodium dihydrogen phosphate), a carbonate buffer system (such as sodium bicarbonate / carbonic acid), an acetate buffer system (such as acetic acid / sodium acetate), a citrate buffer system (such as citric acid / sodium citrate), an ammonium buffer system (such as ammonia / ammonium chloride), a borate buffer system (such as boric acid / sodium borate), a triethanolamine buffer system, and a tartrate buffer system (such as tartaric acid / potassium bitartrate), preferably from a phosphate buffer system, for instance selected from sodium dihydrogen phosphate / sodium hydrogen phosphate and potassium dihydrogen phosphate / potassium hydrogen phosphate; and a carbonate buffer system, for instance selected from sodium bicarbonate / carbonic acid, potassium bicarbonate / carbonic acid, and sodium carbonate / sodium bicarbonate. In some embodiments, the buffer system is a phosphate buffer comprising potassium phosphate and disodium phosphate. In some other embodiments, the buffer system is a carbonate buffer comprising sodium carbonate and sodium bicarbonate. In some embodiments, the buffer system is a phosphate buffer consisting of potassium phosphate and disodium phosphate. In some other embodiments, the buffer system is a carbonate buffer consisting of sodium carbonate and sodium bicarbonate. In various embodiments, the buffer system comprises or consists of boric acid, potassium chloride, and sodium hydroxide. In various embodiments, the buffer system includes tris(hydroxymethyl)aminomethane buffered systems, however, in various embodiments, the buffer system is not a tris(hydroxymethyl)aminomethane buffered system and may even be free of tris(hydroxymethyl)aminomethane. In various embodiments, the compositions of the invention do not comprise a combination of a tris(hydroxymethyl)aminomethane buffer system, 1 % lauryl lactate, and more than 15 wt.-% organic UV filters.

[0080] In various embodiments, the at least one buffer system is present in an amount (of the respective buffer substances, which may be any combination of the acids, bases and salts disclosed herein for said purpose) of about 0.2 to 4 wt.-%, such as 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1 , 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1 , 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1 , 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9 or 4.0 wt.%, preferably in an amount of about 0.3 to 3 wt.-%, more preferably in an amount of about 0.4 to 2 wt.-%, based on the total weight of the composition.

[0081] In various embodiments, the amounts of buffer system or buffer system components may be chosen such that the desired pH of the composition is obtained and maintained. The pH ranges described above apply for such embodiments. In various embodiments, the amounts of lactic acid ester and buffer system are selected based on the desired pH and may be adjusted accordingly. The weight ratio of lactic acid ester to buffer system (components) may be in the range of 5:1 to 1 :5, preferably 3:1 to 1 :3.

[0082] The lactic acid ester and the buffer system may be premixed before any other components are added. In various embodiments, such a premix already has the pH defined herein or is adjusted to have such a pH.

[0083] As the at least one UV filter, UVA, UVB, and / or different broadband UV filters may be used. Suitable UV filters may be organic or inorganic, particulate or non-particulate. Non-particulate UV filters may be miscible or soluble in a given solvent, such as water or a cosmetic oil. In some instances, they may be water soluble or oil soluble, as herein defined. In contrast to non-particulate UV filters, the term “particulate UV filter” relates to UV filters that are essentially insoluble in water or (cosmetic) oils, i.e. their solubility in water and the cosmetic oils mentioned above is below 2 % by weight, for example below 1 % by weight. The term “organic particulate UV filter” relates to UV filters that can be micronized due to their low water and low oil solubility and are dispersed as a particle in water or in oil. “Non-particulate” thus means those filters that are oil- and / or water miscible or -soluble. Oil- and / or water-soluble filters as defined herein, i.e. are not present as solids in the compositions, but may be solids (as such, i.e. if not formulated with other compounds) at 25°C.

[0084] In various embodiments, the UV filters to be comprised in the compositions defined herein are UV filters that are solid at 25 °C and / or are soluble in at least one cosmetic oil. In various embodiments, they are both, i.e. solid at 25°C and soluble in at least one cosmetic oil. In various embodiments, the compositions comprise at least one organic UV filter. In various embodiments, the compositions do not comprise the lactic ester encapsulated in a microcapsule, i.e. the lactic acid ester is comprised in the composition in non-encapsulated, i.e. free from. Particularly excluded are microcapsules that comprise lauryl lactate and an UV filter, such as EHT ((in encapsulated form). The compositions of the invention do thus preferably not comprise microcapsules that comprise a lactic acid ester, such as lauryl lactate, and an UV filter.

[0085] In various embodiments, the at least one UV filter comprised in the compositions of the invention comprises or is a non-particulate oil-soluble UV filter.

[0086] In various embodiments, the at least one UV filter comprised in the compositions of the invention comprises or is a non-particulate water-soluble UV filter.

[0087] In various embodiments, the at least one UV filter comprised in the compositions of the invention comprises or is a particulate oil-insoluble and water-insoluble UV filter.

[0088] The at least one UV filter comprises or is, in various embodiments, an organic UV filter.

[0089] In various embodiments, the at least one UV filter comprises an organic, solid and oil-soluble UV filter. In various alternative or cumulative embodiments, the at least one UV filter comprises an organic, solid and particulate UV filter.

[0090] The compositions of the invention may comprise any one or more of the above types of UV filter either individually or in combination.

[0091] Suitable UVA filters may be selected from the group consisting of disodium phenyl dibenzimidazole tetrasulfonate (DPDT), hexyl 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoate (INCI diethylamino hydroxybenzoyl hexyl benzoate, DHHB), 1-(4-(1 ,1-dimethylethyl)phenyl)-3-(4-methoxyphenyl)propane- 1 ,3-dione (INCI butyl methoxydibenzoylmethane, also known as avobenzone, BMDBM), terephthalylidene dicamphor sulfonic acid (TDSA), methoxypropylamino cyclohexenylidene ethoxyethylcyanoacetate (MCE), and combinations thereof.

[0092] Suitable UVB filters may be selected from the group consisting of 4,4',4"-(1 ,3,5-triazine-2,4,6- triyltriimino)tris-benzoic acid-tris(2-ethylhexyl)ester (INCI ethylhexyl triazone, EHT), 4,4'-[[6-[[4-[[(1 , 1 - dimethylethyl)amino]carbonyl]phenyl]amino]-1 ,3,5-triazin-2,4-diyl]diimino]bis-benzoic acid-bis(2- ethylhexyl)ester (INCI diethylhexyl butamido triazone, DBT), phenylbenzimidazole sulfonic acid, and combinations thereof.

[0093] Suitable broadband UV filters may be selected from the group consisting of bis-ethylhexyloxyphenol methoxyphenyl triazine (INCI bis-ethylhexyloxyphenol methoxyphenyl triazine, BEMT), 2-(2H-benzotriazol- 2-yl)-6-[(2-ethylhexyloxy)methyl]-4-methylphenol, 2-(2H-benzotriazol-2-yl)-4-methyl-6-[2-methyl-3- [1 ,3,3,3-tetramethyl-1-[(trimethylsilyl)oxy]-1-disiloxanyl]propyl]phenol (INCI drometrizole trisiloxane, DTS), 2,2'-methylenbis[6-(2H-benzotriazol-2-yl)-4-(1 ,1 ,3,3-tetramethylbutyl)phenol] (INCI methylene bis- benzotriazolyl tetramethylbutylphenol, MBBT), phenylene bis-diphenyltriazine (PBDT), benzophenone-3 and combinations thereof.

[0094] Suitable organic particulate UV filters (i.e., insoluble, organic UV filters) may be selected from the group consisting of 2,2'-methylene bis[6-(2H-benzotriazol-2-yl)-4-(1 ,1 ,3,3-tetramethylbutyl)phenol] (INCI methylene bis-benzotriazolyl tetramethylbutylphenol, MBBT), 2,4,6-tris(biphenyl-4-yl)-1 ,3,5-triazine (INCI trisbiphenyl triazine, TBPT), 1 ,1 ’-(1 ,4-piperazinediyl)bis[1-[2-[4-(diethylamino)-2-hydroxybenzoyl]phenyl]- methanone (INCI bis-(diethylaminohydroxybenzoyl benzoyl) piperazine), 5,6,5’,6’-tetraphenyl-3-3’-(1 ,4- phenylene)bis(1 ,2,4-triazine) (INCI phenylene bis-diphenyltriazine; PBDT), 1 ,4-di(benzoxazole-2'- yl)benzene and combinations thereof. Further examples of suitable organic particulate UV filters are described e.g. in WO9703643, W02009077356 and WO2015155158. Preferably, the particulate UV filters have a particle size DN50 determined by light scattering of less than 2000 nm, preferably less than 1000 nm, wherein DN50 refers to the particle size value, where half of the population lies below this value, and half of the population lies above this value, i.e., the median value of the particle size volume distribution.

[0095] Inorganic UV filters include titanium dioxide, zinc oxide, iron oxide, cerium oxide and mixtures thereof. In various embodiments, the inorganic UV filters may be applied as a nano material. In this connection it is to be understood that the term “nano material” follows the recommendation of the European Commission 2011 / 696 / EU. Accordingly, in a nano material 50 % of particles, based on a number-based size distribution, are smaller than 100 nm, including constituent particles in aggregates or agglomerates. In another embodiment of the present invention, the inorganic UV filters may be applied as a non-nano material. Accordingly, in a non-nano material more than 50 % of the particles, based on a number-based size distribution, are larger than 100 nm. It is also possible to use mixtures of nano and non-nano inorganic UV filters. Furthermore, the inorganic UV filters may be coated or uncoated. If present, titanium dioxide is preferably coated, as uncoated titanium dioxide is photocatalytic and should be avoided in sunscreens. Coatings suitable in the context of inorganic UV filters may be organic and / or inorganic and are, for instance, disclosed in WO 2023 / 036749 A1 .

[0096] In various embodiments, the composition comprises bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT).

[0097] In various embodiments, the composition comprises diethylamino hydroxybenzoyl hexyl benzoate (DHHB).

[0098] In various embodiments, the composition comprises butyl methoxydibenzoylmethane (BMDBM).

[0099] In various embodiments, the composition comprises ethylhexyl triazone (EHT).

[0100] In various embodiments, the composition comprises methylene bis-benzotriazolyl tetramethylbutylphenol (MBBT). In various embodiments, the composition comprises tris-biphenyl triazine (TBPT).

[0101] In various embodiments, the composition comprises methoxypropylamino cyclohexenylidene ethoxyethylcyanoacetate (MCE).

[0102] In various embodiments, the composition is free of octocrylene.

[0103] In various embodiments, the composition is free of ethylhexyl salicylate.

[0104] In various embodiments, the composition is free of homosalate.

[0105] In various embodiments, the composition is free of ethylhexyl methoxycinnamate (EHMC).

[0106] In various embodiments, the composition is free of any two or more, preferably three or more, more preferably all of octocrylene, ethylhexyl salicylate, homosalate and ethylhexyl methoxy cinnamate (EHMC).

[0107] In various embodiments, the composition comprises at least one UVA filter, such as DHHB or BMDBM or MCE, and at least one UVB filter, such as EHT.

[0108] In various embodiments, the composition comprises at least one broadband UV filter, such as BEMT, and at least one UVA filter, such as DHHB or BMDBM or MCE.

[0109] In various embodiments, the composition comprises at least one broadband UV filter, such as BEMT, and at least one UVB filter, such as EHT.

[0110] In various embodiments, the composition comprises at least one broadband UV filter, such as BEMT, and at least one UVA filter, such as DHHB or BMDBM or MCE, and at least one UVB filter, such as EHT.

[0111] In various embodiments, the composition comprises at least one particulate UV filter, such as MBBT, PBDT or TBPT, and at least one UVA filter, UVB filter and / or broadband UV filter, such as any one or more of DHHB, BMDBM, MCE, EHT, and BEMT. The composition may thus comprise combinations of MBBT and BEMT, MBBT and EHT, and MBBT and DHHB or BMDBM or MCE. Further, a particulate UV filter, such as MBBT, may be used in combination with any combination of UVA, UVB and broadband UV filters disclosed in various embodiments above.

[0112] Specifically, the composition may comprise the following combinations of UV filters

[0113] (1 ) DHHB and EHT;

[0114] (2) DHHB and MBBT,

[0115] (3) DHHB and TBPT;

[0116] (4) DHHB and PBSA;

[0117] (5) DHHB and PBDT; (6) DHHB and TDSA;

[0118] (7) BEMT and DHHB;

[0119] (8) EHT and MBBT;

[0120] (9) EHT and TBPT;

[0121] (10) EHT and PBSA;

[0122] (11 ) EHT and BEMT;

[0123] (12) EHT and PBDT;

[0124] (13) EHT and TDSA;

[0125] (14) MBBT and TBPT;

[0126] (15) MBBT and PBSA;

[0127] (16) MBBT and TDSA;

[0128] (17) MBBT and PBDT;

[0129] (18) MBBT and BEMT;

[0130] (19) TBPT and PBSA;

[0131] (20) TBPT and BEMT;

[0132] (21 ) TBPT and PBDT;

[0133] (22) TBPT and TDSA;

[0134] (23) DHHB, EHT and MBBT;

[0135] (24) DHHB, EHT and TBPT,

[0136] (25) DHHB, EHT and PBSA;

[0137] (26) DHHB, EHT and BEMT;

[0138] (27) DHHB, EHT and PBDT;

[0139] (28) DHHB, EHT and TDSA;

[0140] (29) BEMT, EHT and MBBT;

[0141] (30) BEMT, EHT and TBPT,

[0142] (31 ) BEMT, EHT and PBSA;

[0143] (32) BEMT, EHT and BEMT;

[0144] (33) BEMT, EHT and PBDT;

[0145] (34) BEMT, EHT and TDSA;

[0146] (35) EHT, MBBT and TBPT;

[0147] (36) EHT, MBBT and PBSA;

[0148] (37) EHT, MBBT and BEMT;

[0149] (38) EHT, MBBT, and PBDT;

[0150] (39) EHT, MBBT and TDSA; or

[0151] (40) MBBT, TBPT and PBSA;

[0152] In all the above-listed embodiments of different UV filter combinations the compositions may comprise no other organic UV filter, or even no other UV filter substance besides those explicitly listed. This may mean that the at least one organic UV filter other than TDSA consists of the above-listed combinations. In various embodiments, the sunscreen or daily care composition with photoprotection comprises a total of 4 or 5 to 40 wt.-%, such as 4, 5, 6, 7, 8, 9, 10, 11 , 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 , 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 , 32, 33, 34, 35, 36, 37, 38, 39, or 40 wt.-% of UV filters, such as 4 to 40 wt.-%, 4 to 35 wt.-%, 4 to 30 wt.-%, 5 to 30 wt.-%, 5 to 25 wt.-%, 6 to 30 wt.-%, 6 to 25 wt.-%, 7 to 30 wt.-%, 7 to 25 wt.- %, 7 to 20 wt.-%, or 8 to 35 wt.-%, or 9 to 30 wt.-% or 9 to 35 wt.-%, or 9 to 25 wt.-%, for example 9 to 20 wt.-%, based on the total weight of the sunscreen or daily care composition. The lower limit may be 4, 5, 6, 7 or 8 wt.-% and the upper limit may be 20, 21 , 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 , 32, 33, 34, or 35 wt.-%.

[0153] In various embodiments, the composition comprises at least one broadband UV filter, such as BEMT, preferably in an amount of from 0.5 to 10 % by weight, such as 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1 .5, 2.0, 2.5, 3.0,

[0154] 3.5, 4.0, 4.5, 5.0, 6, 7, 8, 9, or 10 wt.-%, more preferably in an amount of from 2 to 5 % by weight, based on the total weight of the sunscreen or daily care composition.

[0155] In various embodiments, the composition comprises at least one UVA filter, such as DHHB or BMDBM or MCE, preferably in an amount of from 0.5 to 10 % by weight, such as 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.5, 2.0,

[0156] 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 6, 7, 8, 9, or 10 wt.-%, based on the total weight of the sunscreen or daily care composition.

[0157] In various embodiments, the composition comprises at least one UVB filter, such as EHT, preferably in an amount of from 0.5 to 10 % by weight, such as 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 6, 7, 8, 9, or 10 wt.-%, based on the total weight of the sunscreen or daily care composition.

[0158] In various embodiments, the composition comprises at least one particulate UV filter, such as MBBT, PBDT, or TBPT, preferably in an amount of from 0.5 to 10 % by weight, such as 0.5, 0.6, 0.7, 0.8, 0.9, 1 .0, 1 .5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 6, 7, 8, 9, or 10 wt.-%, based on the total weight of the sunscreen or daily care composition.

[0159] In various embodiments in which the composition comprises BEMT, BEMT is comprised in an amount of from 0.5 to 10.0 wt.-%, for example 1.0 to 9.0 wt.-% or 1.5 to 8.5 wt.-% or 2.0 to 8.0 wt.-% or 2.0 to 7.0 wt.-% or 2.0 to 6.0 wt.-% or 2.0 to 5.5 wt.-%, or 2.0 to 5.0 wt.-%, or 3.0 to 7.0 wt.-% or 3.0 to 6.0 wt.-%, preferably 1 .0 to 6.0 wt.-%, more preferably 2.0 to 5.0 wt.-%, based on the total weight of the composition.

[0160] In various embodiments in which the composition comprises EHT, EHT is comprised in an amount of from 0.5 to 5.0 wt.-%, for example 1 .0 to 5.0 wt.-% or 1 .5 to 4.5 wt.-% or 2.0 to 4.0 wt.-%, preferably 1 .0 to 4.0 wt.-%, more preferably 1.5 to 3.0 wt.-%, based on the total weight of the composition.

[0161] In various embodiments in which the composition comprises PBSA, PBSA is comprised in an amount of from 0.5 to 5.0 wt.-%, for example 1 .0 to 5.0 wt.-% or 1 .5 to 4.5 wt.-% or 2.0 to 4.0 wt.-%, preferably 1 .0 to 4.0 wt.-%, more preferably 1 .5 to 3.0 wt.-%, based on the total weight of the composition. In various embodiments in which the composition comprises DHHB, DHHB is comprised in an amount of from 0.5 to 10.0 wt.-%, for example 1.0 to 9.0 wt.-% or 1.5 to 8.5 wt.-% or 2.0 to 8.0 wt.-% or 2.0 to 7.0 wt.-% or 2.0 to 6.0 wt.-% or 2.0 to 5.5 wt.-%, or 2.0 to 5.0 wt.-%, or 3.0 to 7.0 wt.-% or 3.0 to 6.0 wt.-%, based on the total weight of the composition.

[0162] In various embodiments in which the composition comprises TBPT, TBPT is comprised in an amount of from 0.5 to 10.0 wt.-%, for example 1.0 to 9.0 wt.-% or 1.5 to 8.5 wt.-% or 2.0 to 8.0 wt.-% or 2.0 to 7.0 wt.-% or 2.0 to 6.0 wt.-% or 2.0 to 5.5 wt.-%, or 2.0 to 5.0 wt.-%, or 3.0 to 7.0 wt.-% or 3.0 to 6.0 wt.-%, preferably 1 .0 to 5.0 wt.-%, more preferably 2.0 to 4.0 wt.-%, based on the total weight of the composition.

[0163] In various embodiments in which the composition comprises BMDBM, BMDBM is comprised in an amount of from 0.5 to 5.0 wt.-%, for example 1 .0 to 5.0 wt.-% or 1 .5 to 4.5 wt.-% or 2.0 to 4.0 wt.-%, preferably 1 .0 to 5.0 wt.-%, more preferably 2.0 to 5.0 wt.-%, based on the total weight of the composition.

[0164] In various embodiments in which the composition comprises MBBT, MBBT is comprised in an amount of from 0.5 to 10.0 wt.-%, for example 1.0 to 9.0 wt.-% or 1.5 to 8.5 wt.-% or 2.0 to 8.0 wt.-% or 2.0 to 7.0 wt.-% or 2.0 to 6.0 wt.-% or 2.0 to 5.5 wt.-%, or 2.0 to 5.0 wt.-%, or 3.0 to 7.0 wt.-% or 3.0 to 6.0 wt.-%, preferably 1 .0 to 5.0 wt.-%, more preferably 1 .5 to 4.0 wt.-%, based on the total weight of the composition.

[0165] In various embodiments in which the composition comprises PBDT, PBDT is comprised in an amount of from 0.5 to 10.0 wt.-%, for example 1.0 to 9.0 wt.-% or 1.5 to 8.5 wt.-% or 2.0 to 8.0 wt.-% or 2.0 to 7.0 wt.-% or 2.0 to 6.0 wt.-% or 2.0 to 5.5 wt.-%, or 2.0 to 5.0 wt.-%, or 3.0 to 7.0 wt.-% or 3.0 to 6.0 wt.-%, preferably 1 .0 to 6.0 wt.-%, more preferably 2.0 to 5.0 wt.-%, based on the total weight of the composition.

[0166] In various embodiments, the weight ratio of the at least one broadband UV filter to at least one UVB filter, at least one UVA filter or at least one particulate UV filter may be in the range of 1 :5 to 5:1 , for example 1 :3 to 3:1.

[0167] In various embodiments, the weight ratio of the at least one UVA filter to at least one UVB filter or at least one particulate UV filter may be in the range of 1 :5 to 5:1 , for example 1 :3 to 3:1.

[0168] In various embodiments, the weight ratio of the at least one UVB filter to at least one particulate UV filter may be in the range of 1 :5 to 5:1 , for example 1 :3 to 3:1 .

[0169] In various embodiments, the weight ratio of the at least one particulate UV filter to at least one UVB filter or at least one UVA filter may be in the range of 1 :5 to 5: 1 , for example 1 :3 to 3: 1 .

[0170] In various embodiments, the weight ratio of the lactic acid ester, preferably lauryl lactate, and the at least one UV filter is in the range of 3:1 to 1 :10, preferably 2:1 to 1 :6, such as 1.5:1 to 1 :5 or 1 :1 to 1 :4. Said weight ratio may also apply to the weight ratios of the lactic acid ester, preferably lauryl lactate, and the at least one organic UV filter, e.g. the totality of organic UV filters in the composition. Said weight ratio may also apply to the weight ratios of the lactic acid ester, preferably lauryl lactate, and the at least one solid and / or oil-soluble UV filter, e.g. the totality of solid and / or oil-soluble UV filters in the composition. Said weight ratio may also apply to the weight ratios of the lactic acid ester, preferably lauryl lactate, and the at least one triazine UV filter, e.g. the totality of triazine UV filters in the composition.

[0171] In some embodiments, the composition is free of at least one or more of parabenes, phenoxyethanol, and organic UV filter compounds selected from the group of homomethyl salicylate, ethylhexyl methoxycinnamate, octocrylene, and ethylhexyl salicylate. In some embodiments, the sunscreen or daily care composition with photoprotection is free of parabens. In various embodiments, the sunscreen or daily care composition with photoprotection is free of phenoxyethanol. In various embodiments, the sunscreen or daily care composition with photoprotection is free of parabens and phenoxyethanol. In various embodiments, the sunscreen or daily care composition with photoprotection is free of homomethyl salicylate. In various embodiments, the sunscreen or daily care composition with photoprotection is free of ethylhexyl methoxycinnamate. In various embodiments, the sunscreen or daily care composition with photoprotection is free of octocrylene. In various embodiments, the sunscreen or daily care composition with photoprotection is free of ethylhexyl salicylate. In various embodiments, the sunscreen or daily care composition with photoprotection is free of homomethyl salicylate, ethylhexyl methoxycinnamate, octocrylene, and ethylhexyl salicylate. In various embodiments, the sunscreen or daily care composition with photoprotection is free of parabenes, phenoxyethanol, and organic UV filter compounds selected from the group of homomethyl salicylate, ethylhexyl methoxycinnamate, octocrylene, and ethylhexyl salicylate.

[0172] In various embodiments, the sunscreen or daily care composition with photoprotection provides a SPF of more than 15, preferably of more than 30. In another preferred embodiment of the present invention, the sunscreen or daily care composition with photoprotection provides a SPF of more than 50, preferably of more than 60. In another preferred embodiment of the present invention, the sunscreen or daily care composition with photoprotection provides a SPF of more than 90. The SPF may be determined according to any method known in the art.

[0173] Further, in connection with the above embodiments, it is to be understood that the sunscreen or daily care composition with photoprotection may comprise at least one additive.

[0174] In one embodiment, the at least one additive is selected from the group consisting of emulsifiers, emollients, viscosity regulators (thickeners), stabilizers, sensory enhancers, humectants, film formers, UV scattering compounds, adjuvants such as vitamins, antioxidants, chelating agents, preservatives, perfumes, and combinations thereof.

[0175] Preferred O / W emulsifiers include, without limitation, glucose derivatives such as cetearyl glucoside, arachidyl glucoside, lauryl glucoside, polyglyceryl-3 methylglucose distearate, methyl glucose sesquistearate; sucrose derivative such as sucrose polystearate, sucrose palmitate; sorbitol derivatives such as polysorbate derivatives; inulin derivatives such as inulin lauryl carbamate; glycerides of fatty acids such as glyceryl stearate, glyceryl stearate SE, glyceryl stearate citrate, glumatic acid derivatives such as sodium stearoyl glutamate; sulfosuccinic acid derivatives such as disodium cetearyl sulfosuccinate; phosphoric acid derivatives such as potassium cetyl phosphate, ceteh-10 phosphate, C20-22 alkyl phopshate; fatty acid esters of polyglyceryl such as polyglyceryl-3-diisostearate, polyglyceryl-2- dipolyhydroxystearate; polyglyceryl-10 stearate oxyalkenylated fatty alcohol such as ceteareth-20, steareth-21 , beneheth-25 oxyalkenylated fatty acid such as PEG-100 stearate oxyalkenylated organomodified silicone / polysiloxane / polyalkyl / polyether copolymers and derivatives. ethoxylated fatty acid soap phospholipids based such as lecithin derivatives

[0176] Preferred emulsifiers to form a W / O emulsion include, without limitation, glycerides of fatty acids such glyceryl oleate, sorbitan laurate sorbitan esters such as sorbitan oleate fatty acid esters of polyglyceryl such as polyglyceryl-3-diisostearate, polyglyceryl-2- dipolyhydroxystearate, polyglyceryl-4 isostearate

[0177] Oxyakenylated fatty alcohol such steareth-2

[0178] Oxyakenylated fatty acid such as PEG-30 dipolyhydroxystearate organomodified silicone / polysiloxane / polyalkyl / polyether copolymers and derivatives such as cetyl dimethicone copolyol, cetyl PEG / PPG-10 / 1 Dimethicone, PEG-10 dimethicone

[0179] Preferred emollients include esters of linear or branched fatty acids with linear or branched fatty alcohols such as propylheptyl caprylate, coco caprylate, isopropyl myristate, ethylhexyl palmitate; esters of aromatic carboxylic acids with linear or branched fatty alcohols such as C12-C15-alkyl benzoate, ethylhexyl benzoate, phenethyl benzoate; dicarboxylic acid esters with linear or branched alcohols such as dibutyl adipate, dicaprylyl carbonate, diisopropyl sebacate; esters of hydroxycarboxylic acids with linear or branched fatty alcohols; esters of linear or branched fatty acids with polyhydric alcohol such as butylene glycol dicaprylate / dicaprate; mono-, di-, tri-glycerides based on C6-C18 fatty acids such as caprylic / capric triglycerides, coco glycerides; guerbet alcohols such as octyldodecynol; hydrocarbons such as hydrogenated polyisobutene, mineral oil, squalene, isohexadecane; ethers such as dicaprylyl ether; silicone derivatives (organomodified polysiloxanes) such as dimethylpolysiloxane, cyclic silicones. Preferred lipophilic thickeners include, without limitation, fatty alcohols such as cetyl alcohol, cetearyl alcohol, stearyl alcohol; behenyl alcohol fatty acids such as stearic acid; palmitic acid fatty acid esters such as myristyl stearate, pentaerythrityl distearate, cetyl palmitate; Tribehenin, dextrin palmitate waxes such as beeswax, carnauba wax, microcrystalline wax, ceresin, ozocerite; Oryza Sativa bran wax, sunflower wax hydrogenated vegetable oil, hydrogenated castor oil, hydrogenated vegetable glycerides, hydrogenated castor oil / sebacic acid copolymer silica based derivatives such as silica, silica dimethyl silylate

[0180] Hydrophilic stabilizers / thickeners include, without limitation, natural gums such as xanthan gum, tara gum, carrageenan silicate derivatives such as magnesium aluminium silicates; cellulose derivatives such as hydroxypropyl cellulose, microcrystalline cellulose starch derivatives such as hydroxypropyl starch phosphate

[0181] Hydrophilic stabilizers / thickeners include, without limitation, natural gums such as xanthan gum, tara gum, carrageenan, guar gum, agar gum, alginates, gellan gum silicate derivatives such as magnesium aluminium silicates; cellulose derivatives such as hydroxypropyl cellulose, microcrystalline cellulose starch derivatives such as hydroxypropyl starch phosphate polyacrylates or homopolymers of reticulated acrylic acids or polyacrylamides such as carbomers, acrylate copolymers, acrylate / C10-C30-alkyl acrylate crosspolymer, acrylate / beheneth-25 methacrylate copolymer

[0182] Also included may be UV protection scattering compounds. These include, without limitation: microcrystalline cellulose; calcium carbonate; hydroxyapatite; silica. hollow sphere such as Styrene / Acrylates Copolymer

[0183] Further components may belong to the class of film formers and film forming enhancers. Such compounds include, without limitation, hydrogenated dimer dilinoleyl / dimethylcarbonate copolymer; diisostearoyl polyglyceryl-3 dimer dilinoleate; polyglyceryl-3 stearate / sebacate crosspolymer; cellulose derivatives, such as methylcellulose and ethylcellulose; capryloyl glycerin / sebacic acid copolymer.

[0184] Preferred sensory enhancers include polyamide derivatives such as nylon-12; polymethyl methacrylates; silica; mica; polymethylsilsesquioxane; polyethylene; starch derivatives such as aluminum starch octenylsuccinate; dimethicone derivatives; boron nitride;

[0185] HDI / trimethylol hexyllactone crosspolymer.

[0186] Preferred humectants include polyols such as:

[0187] - glycerin; butylene glycol; propylene glycol; sorbitol beta-glucan;

[0188] 1 ,2 pentadiol;

[0189] 1 ,2 hexandiol;

[0190] 1 ,2 octandiol;

[0191] 1 ,2 decandiol;

[0192] 2-Methyl-1 ,3-propandiol.

[0193] Preferred adjuvants include ethanol dyes pigments such as iron oxides tocopherol derivatives; retinol derivatives; ascorbic acid derivatives; bisabolol; allantoin; panthenol; chelating agents (EDTA, EDDS, EGTA, phytic acid, piroctone olamine); ethylhexyl glycerin; hydroxyacetophenone; caprylhydroxymic acid; propellants such as propane, butane, isobutene, dimethyl ether; styrene / PVP or styrene acrylamide copolymers; insect repellants such as butylacetylaminopropionate.

[0194] Preferred preservatives include benzyl alcohol; zingerone.

[0195] Preferred perfumes are selected from the group consisting of limonene, citral, linalool, alpha- isomethylionon, geraniol, citronellol, 2-isobutyl-4-hydroxy-4-methyltetrahydropyrane, 2-tert.- pentylcyclohexylacetate, 3-methyl-5-phenyl-1 -pentanol, 7-acetyl-1 ,1 ,3,4,4, 6-hexamethyltetraline, adipine acid diester, alpha-amylcinnamaldehyde, alpha-methylionon, amyl C butylphenylmehtylpropionalcinnamal, amylsalicylate, amylcinnamylalcohol, anisalcohol, benzoin, benzylalcohol, benzylbenzoate, benzylcinnamate, benzylsalicylate, bergamot oil, bitter orange oil, butylphenylmethylpropioal, cardamom oil, cedrol, cinnamal, cinnamylalcohol, citronnellylmethylcrotonate, lemon oil, coumarin, diethylsuccinate, ethyllinalool, eugenol, evernia furfuracea extracte, evernia prunastri extracte, farensol, guajak wood oil, hexylcinnamal, hexylcalicylate, hydroxycitronellal, lavender oil, lemon oil, linaylacetate, mandarine oil, menthyl PCA, methylheptenone, nutmeg oil, rosemary oil, sweet orange oil, terpineol, tonka bean oil, triethylcitrate, vanillin and combinations thereof.

[0196] In connection with the above preferred embodiments, it is to be understood that if the sunscreen or daily care composition with photoprotection comprises two or more additives, combinations of the additives as defined above are also part of the invention.

[0197] The final formulations of the sunscreen or daily care composition with photoprotection may exist in a wide variety of presentation forms, for example: in the form of liquid preparations as a W / O, O / W, oil-in-water-in- oil (O / W / O), water-in-oil-in water (W / O / W) or phase-inversion-technology (PIT) emulsion, a polymeric- based emulsion, and all kinds of microemulsions. The final formulations can be provided in different forms such as a gel, a cream, milk or lotion, in the form of a powder, in the form of a stick, in the form of a spray (spray with propellant gas or pump-action spray) or an aerosol, in the form of a foam, or in the form of a paste.

[0198] Typically, the sunscreen or daily care composition with photoprotection comprises water in an amount of more than 5 % by weight, such as within the range of about 5.5 to 95 wt.-%, such as within the range of 10 to 90 wt.-%, for instance within the range of 15 to 85 wt.-%, based on the total weight of the composition.

[0199] For instance, when formulated as a water-in oil or an oil-in-water dispersion, an optional cosmetically acceptable carrier preferably comprises 5 to 50 % of an oil phase, 1 to 10 % of an emulsifier and 30 to 90 % of water, each by weight based on the total weight of the carrier. The oil phase may comprise any oil conventionally used in cosmetic formulations. In connection with the above embodiments, it is to be understood that the sunscreen or daily care compositions are in particularly suitable for protection of the skin from UV radiation.

[0200] Hence, the present invention further relates to the sunscreen or daily care composition, as defined herein, for use in protecting the human skin from UV radiation. The present invention further relates to a method of protecting the human skin from UV radiation by administration of the sunscreen or daily care composition, as defined herein.

[0201] In a further aspect, the present invention relates to the use of a combination of at least one ester of lactic acid and at least one buffer system for improving stability of a sunscreen or daily care composition with photoprotection comprising at least one UV filter.

[0202] In some such embodiments, said combination is for improving the pH stability of the composition and maintains the pH of the composition within the range of 5 to 8.0, such as at a pH of 5, 5.6, 5.7, 5.8, 5.9, 6.0, 6.1 , 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7.0, 7.1 , 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, or 8.0.

[0203] In some further embodiments, said combination is for improving the pH stability of the composition and maintains the pH of the composition within the range of 5 to 8.0 when stored at a temperature of about 25 °C.

[0204] In some further embodiments, said combination is for improving the pH stability of the composition and maintains the pH of the composition within the range of 6.5 to 8.0 when stored at a temperature of about 25 °C.

[0205] In some other embodiments, said combination is for improving the pH stability of the composition and maintains the pH of the composition within the range of above 5.0 to 8.5, for instance 5.5, 5.1 , 5.2, 5.3, 5.4, 5.5 5.6, 5.7, 5.8, 5.9, 6.0, 6.1 , 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7.0, 7.1 , 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, 8.0, 8.1 , 8.2, 8.3, 8.4, or 8.5, such as within the range of 6.5 to 8.5, when stored at a temperature of about 40 °C.

[0206] In some particular embodiments, said combination is for improving the pH stability of the composition and maintains the pH of the composition within the range of 5.5 to 8.0, when stored at a temperature of about 25 °C, for a period of at least one week, preferably at least two weeks, more preferably at least three weeks, even more preferably at least 4, 5, 6, 7, 8, 9, 10, 11 , 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 , 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 , 32, 33, 34, 35, 36, 37, 38, 39, 40, 41 , 42, 43, 44, 45, 46, 47, 48, 49, 50, 51 or 52 weeks. Accordingly, in some embodiments, the period of storage is at least one week, preferably at least two weeks, more preferably at least four weeks, or at least 5, 6, 7, 8, 9, 10, 1 1 , 12, 13, 14, 15, 16, 17, 18,

[0207] 19, 20, 21 , 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 , 32, 33, 34, 35, 36, 37, 38, 39, 40, 41 , 42, 43, 44, 45, 46,

[0208] 47, 48, 49, 50, 51 , 52, 55, 60, 80, 90, 100 or 104 weeks. In various embodiments, said combination is for improving the pH stability of the composition and maintains the pH of the composition within the range of 5.5 to 8.5 when stored at a temperature of about 40 °C for a period of at least one week, preferably at least two weeks, more preferably at least three weeks, even more preferably at least four weeks.

[0209] In yet another aspect, the present invention also relates to the use of a lactic acid ester, such as lauryl lactate, or a combination of at least one ester of lactic acid and at least one buffer system for improving solubility of at least one UV filter, preferably selected from the group of UV filters that are solid at 25°C and / or soluble in at least one cosmetic oil and / or 1 ,3,5-triazine-based UV filters, in a sunscreen or daily care composition.

[0210] In yet another aspect, the present invention also relates to the use of a lactic acid ester, such as lauryl lactate, or a combination of at least one ester of lactic acid and at least one buffer system for improving stability of a sunscreen or daily care composition comprising at least one UV filter, preferably selected from the group of UV filters that are solid at 25°C and / or soluble in at least one cosmetic oil and / or an organic UV filter and / or 1 ,3,5-triazine-based UV filters and / or organic particulate filters.

[0211] In still another aspect, the present invention relates to the use of a lactic acid ester, such as lauryl lactate, or a combination of at least one ester of lactic acid and at least one buffer system for improving the sensory performance of a sunscreen or daily care composition comprising at least one UV filter, preferably selected from the group of UV filters that are solid at 25°C and / or soluble in at least one cosmetic oil and / or an organic UV filter and / or 1 ,3,5-triazine-based UV filters and / or organic particulate filters.

[0212] In still another aspect, the present invention relates to the use of a lactic acid ester, such as lauryl lactate, or a combination of at least one ester of lactic acid and at least one buffer system for improving the spreadability of a sunscreen or daily care composition comprising at least one UV filter, preferably selected from the group of UV filters that are solid at 25°C and / or soluble in at least one cosmetic oil and / or an organic UV filter and / or 1 ,3,5-triazine-based UV filters and / or organic particulate filters.

[0213] In still another aspect, the present invention relates to the use of a lactic acid ester, such as lauryl lactate, or a combination of at least one ester of lactic acid and at least one buffer system for reducing the stickiness of a sunscreen or daily care composition comprising at least one UV filter, preferably selected from the group of UV filters that are solid at 25°C and / or soluble in at least one cosmetic oil and / or an organic UV filter and / or 1 ,3,5-triazine-based UV filters and / or organic particulate filters.

[0214] In still another aspect, the present invention relates to the use of a lactic acid ester, such as lauryl lactate, or a combination of at least one ester of lactic acid and at least one buffer system for reducing the oiliness of a sunscreen or daily care composition comprising at least one UV filter, preferably selected from the group of UV filters that are solid at 25°C and / or soluble in at least one cosmetic oil and / or an organic UV filter and / or 1 ,3,5-triazine-based UV filters and / or organic particulate filters. The buffer systems in said uses may be those disclosed herein above in relation to the compositions of the invention. In various embodiments, it refers to buffer substances of a type and / or in an amount suitable to provide for a pH within the range of 5.5 to 8.5 of a formulation containing water.

[0215] “Improving the solubility”, as used herein, preferably relates to a measurable increase in solubility relative to the same system in which no lactic acid ester, such as lauryl lactate, and / or no buffer system or a different cosmetic oil is used.

[0216] “Improving the stability”, as used herein, preferably relates to a measurable increase in stability relative to the same system in which no lactic acid ester, such as lauryl lactate, and / or no buffer system or a different cosmetic oil is used.

[0217] Similarly, “improving the sensory performance”, “improving the spreadability” and “reducing the stickiness / oiliness”, as used herein, preferably relates to a measurable change relative to the same system in which no lactic acid ester, such as lauryl lactate, and / or no buffer system or a different cosmetic oil is used.

[0218] It has been found by the inventors that lactic acid esters, optionally in combination with a suitable buffer system, provide for increased stability, increased solubility of UV filters, improved sensory performance, improved spreadability, reduced stickiness and / or reduced oiliness relative to compositions that do not contain a lactic acid ester as described herein.

[0219] It is to be understood that the above embodiments of the sunscreen or daily care composition with photoprotection are also applicable for the uses and the method of administering according to the present invention, and vice versa.

[0220] The present invention is further illustrated by the following non-limiting examples.

[0221] Examples

[0222] Example 1

[0223] Table 1 : Test formulations A-D

[0224] * Phosphate buffer pH 7 to 7.5

[0225] ** Borate buffer pH 9 to 10

[0226] *** Carbonate buffer pH 8 to 9 Heat part A and B to 75°C under magnetic stirring. Add part A into B under stirring, then homogenize with an Ultra Turrax type device. Cool down, below 40°C, add part C then part D.

[0227] The results obtained with the above formulations in terms of pH stability are depicted in Figure 1 (storage temperature 25 °C) and Figure 2 (storage temperature 40 °C). The combination of lauryl lactate with different buffer systems provides for stable formulations even at elevated temperatures over prolonged periods of storage time.

[0228] Example 2

[0229] Table 2: Test formulations E-G

[0230] * Phosphate buffer pH should present a pH 7 to 7.5 ** Carbonate buffer should present a pH between 8 to 9 Heat part A and B to 75°C under magnetic stirring. Add part A into B under stirring, then homogenize with an Ultra Turrax type device. Cool down, below 40°C, add part C then part D (previously prepared by mixing), then add part E. The results obtained with the above formulations in terms of pH stability are depicted in Figure 3 (storage temperature 25 °C) and Figure 4 (storage temperature 40 °C). The combination auf lauryl lactate with different buffer systems provides for stable formulations even at elevated temperatures over prolonged periods of storage time. When the sunscreens contain the filter phenyl benzimidazole sulfonic acid it is essential that the pH is maintained over a value of 6.5 to avoid its recrystallization.

Claims

Claims1 . A sunscreen or daily care composition with photoprotection, comprising:(i) at least one ester of lactic acid in an amount of about 1 to 20 wt.-% based on the total weight of the composition, wherein the at least one ester of lactic acid preferably comprises lauryl lactate;(ii) at least one buffer system; and(iii) at least one organic UV filter; wherein the pH of the composition is within the range of 5.5 to 8.0.

2. The sunscreen or daily care composition with photoprotection according to claim 1 , wherein the pH of the composition is maintained within the range of 5.5 to 8.0 over a storage period of at least one week at a temperature of about 25 °C and / or about 40°C.

3. The sunscreen or daily care composition with photoprotection according to any one of the preceding claims, wherein the at least one ester of lactic acid is present in an amount of about 2 to 15 wt.-%, preferably about 3 to 10 wt.-%, based on the total weight of the composition.

4. The sunscreen or daily care composition with photoprotection according to any one of the preceding claims, wherein(1 ) the buffer system is selected from the group consisting of a phosphate buffer system, a carbonate buffer system, an acetate buffer system, a citrate buffer system, an ammonium buffer system, a borate buffer system, a triethanolamine buffer system, and a tartrate buffer system, preferably from a phosphate buffer system and a carbonate buffer system; and / or(2) the at least one buffer system is present in an amount of about 0.2 to 4 wt.-%, preferably in an amount of about 0.3 to 3 wt.-%, more preferably in an amount of about 0.4 to 2 wt.-%, based on the total weight of the composition.

5. The sunscreen or daily care composition with photoprotection according to any one of the preceding claims, wherein the composition comprises at least one UV filter in an amount of 5 to 40 wt.-%, preferably of 8 to 35 wt.-%, more preferably of 9 to 30 wt.-% or of 9 to 35 wt.-%, still more preferably of 9 to 25 wt.-%, and in particular of 9 to 20 wt.-%, based on the composition.

6. The sunscreen or daily care composition with photoprotection according to any one of the preceding claims, wherein the at least one UV filter comprises(1 ) a UV filter that is solid at 25°C;(2) a UV filter that is soluble in at least one cosmetic oil; or(3) a particulate UV filter.

7. The sunscreen or daily care composition with photoprotection according to any one of the preceding claims, wherein the at least one UV filter is solid at 25°C and soluble in at least one cosmetic oil.

8. The sunscreen or daily care composition with photoprotection according to any one of the preceding claims, wherein the composition comprises at least one UVA filter, preferably selected from the group consisting of disodium phenyl dibenzimidazole tetrasulfonate, hexyl 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoate (INCI diethylamino hydroxybenzoyl hexyl benzoate), 1-(4-(1 ,1-dimethylethyl)phenyl)-3-(4- methoxyphenyl)propane-1 ,3-dione (INCI butyl methoxydibenzoylmethane), methoxypropylamino cyclohexenylidene ethoxyethylcyanoacetate (MCE), terephthalylidene dicamphor sulfonic acid, and combinations thereof; and / or at least one UVB filter, preferably selected from the group consisting of 4,4',4"-(1 ,3,5-triazine- 2,4,6-triyltriimino)tris-benzoic acid-tris(2-ethylhexyl)ester (INCI ethylhexyl triazone), 4,4'-[[6-[[4-[[(1 ,1- dimethylethyl)amino]carbonyl]phenyl]amino]-1 ,3,5-triazin-2,4-diyl]diimino]bis-benzoic acid-bis(2- ethylhexyl)ester (INCI diethylhexyl butamido triazone), phenylbenzimidazole sulfonic acid, and combinations thereof; and / or at least one broadband UV filter, preferably selected from the group consisting of bisethylhexyloxyphenol methoxyphenyl triazine (INCI bis-ethylhexyloxyphenol methoxyphenyl triazine), 2-(2H-benzotriazol-2-yl)-6-[(2-ethylhexyloxy)methyl]-4-methylphenol, 2-(2H-benzotriazol-2-yl)-4- methyl-6-[2-methyl-3-[1 ,3,3,3-tetramethyl-1-[(trimethylsilyl)oxy]-1-disiloxanyl]propyl]phenol (INCI drometrizole trisiloxane), 2,2'-methylenbis[6-(2H-benzotriazol-2-yl)-4-(1 ,1 ,3,3- tetramethylbutyl)phenol] (INCI methylene Bis-benzotriazolyl tetramethylbutylphenol), phenylene bisdiphenyltriazine (PBDT), and combinations thereof; and / or at least one organic particulate UV filter, preferably selected from the group consisting of 2,2'- methylene bis[6-(2H-benzotriazol-2-yl)-4-(1 ,1 ,3,3-tetramethylbutyl)phenol] (INCI methylene bis- benzotriazolyl tetramethylbutylphenol), 2,4,6-tris(biphenyl-4-yl)-1 ,3,5-triazine (INCI trisbiphenyl triazine), 1 ,1 ’-(1 ,4-piperazinediyl)bis[1-[2-[4-(diethylamino)-2-hydroxybenzoyl]phenyl]-methanone (INCI bis-(diethylaminohydroxybenzoyl benzoyl) piperazine), 5,6,5’,6’-tetraphenyl-3-3’-(1 ,4- phenylene)bis(1 ,2,4-triazine) (INCI phenylene bis-diphenyltriazine; PBDT), micronized 1 ,4- di(benzoxazole-2'-yl)benzene and combinations thereof; and / or at least one inorganic UV filter, preferably selected from the group consisting of titanium dioxide, zinc oxide, iron oxide, cerium oxide and mixtures thereof.

9. The sunscreen or daily care composition with photoprotection according to any one of the preceding claims, comprising at least one UV filter selected from bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT), diethylamino hydroxybenzoyl hexyl benzoate (DHHB), methoxypropylamino cyclohexenylidene ethoxyethylcyanoacetate (MCE), butyl methoxydibenzoylmethane (BMDBM), ethylhexyl triazone (EHT), methylene bis-benzotriazolyl tetramethylbutylphenol (MBBT), tris-biphenyl triazine (TBPT), and any combination of two or more thereof.

10. The sunscreen or daily care composition with photoprotection according to any one of the preceding claims, comprising at least one broadband UV filter, preferably BEMT, preferably in an amount offrom 0.5 to 10 % by weight, more preferably 2 to 5 % by weight, based on the total weight of the composition.

11. The sunscreen or daily care composition with photoprotection according to any one of the preceding claims, wherein(1 ) the composition is free of at least one or more of parabenes, phenoxyethanol, and organic UV filter compounds selected from the group of homomenthyl salicylate, ethylhexyl methoxycinnamate, octocrylene, and ethylhexyl salicylate; and / or(2) the composition further comprises at least one additive, preferably selected from the group consisting of emulsifiers, emollients, viscosity regulators (thickeners), stabilizers, sensory enhancers, film formers, UV scattering compounds, adjuvants, preservatives, perfumes, and combinations thereof.

12. Use of at least one lactic acid ester or a combination of at least one ester of lactic acid and at least one buffer system for improving stability of a sunscreen or daily care composition with photoprotection comprising at least one organic UV filter.

13. Use of at least one lactic acid ester or a combination of at least one ester of lactic acid and at least one buffer system for improving solubility of at least one UV filter in a sunscreen or a daily care composition, preferably(1 ) a UV filter solid at 25°C; and / or(2) a UV filter that is soluble in at least one cosmetic oil; and / or(3) a 1 ,3,5-triazine UV filter.

14. Use of at least one lactic acid ester or a combination of at least one ester of lactic acid and at least one buffer system for improving sensory performance of a sunscreen or daily care composition with photoprotection comprising at least one organic UV filter.

15. Use of at least one lactic acid ester or a combination of at least one ester of lactic acid and at least one buffer system for improving spreadability of a sunscreen or daily care composition with photoprotection comprising at least one organic UV filter.

16. Use of at least one lactic acid ester or a combination of at least one ester of lactic acid and at least one buffer system for reducing stickiness / oiliness of a sunscreen or daily care composition with photoprotection comprising at least one organic UV filter.

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