Personal care compositions containing lactates

Abstract

This invention relates to a sunscreen or daily care composition with photoprotection, comprising: (i) at least one lactate; (ii) at least one buffer system; and (iii) at least one UV filter, wherein the pH of the composition is in the range of 5.5 to 8.0. The invention also relates to the use of at least one lactate for improving the stability of a sunscreen or daily care composition containing a UV filter, for improving the solubility of the UV filter in the sunscreen or daily care composition, for improving sensory properties, for improving spreadability, for reducing tackiness and / or reducing oiliness.

Description

Technical Field

[0001] This invention relates to a sunscreen or daily care composition with photoprotection, comprising: (i) at least one lactate; (ii) at least one buffering system; and (iii) at least one UV filter, wherein the pH of the composition is in the range of 5.5 to 8.0. The invention also relates to the use of a combination of at least one lactate and at least one buffering system for improving the stability of a sunscreen or daily care composition with photoprotection containing at least one UV filter, and to the use of a combination of at least one lactate and at least one buffering system for improving the solubility of at least one UV filter in the sunscreen or daily care composition. Background Technology

[0002] UV radiation has harmful effects on human skin. In addition to the acute effects of sunburn, UV radiation is known to increase the risk of skin cancer. Furthermore, prolonged exposure to UV-A and UV-B light can cause phototoxicity and photosensitivity reactions on the skin and may accelerate skin aging.

[0003] To protect human skin from UV radiation, various sunscreen UV filters (also known as UV absorbers) exist, including UV-A filters, UV-B filters, and broadband filters. These filters are added to sunscreen or daily care compositions. UV filters are organic or inorganic, particulate or non-particulate compounds that have absorption efficacy across the entire UV light spectrum. Generally, UV light reaching the Earth's surface can be divided into UV-A radiation and UV-B radiation. Depending on the location of maximum absorption, UV filters are classified as UV-A and UV-B filters. A UV filter that absorbs both UV-A and UV-B light is called a broadband absorber. Because broadband UV filters provide protection against both UVA and UVB radiation, it is preferable to add these types of UV filters to sunscreen or daily care compositions. However, there is still a need for improved formulations that provide highly effective and safe UV protection.

[0004] In particular, regarding user requirements, sunscreen or daily care compositions that appear to have satisfactory stability, especially during extended storage periods and / or at elevated temperatures (i.e., temperatures above room temperature (20°C to 25°C)), are preferred.

[0005] Against this backdrop, there is a persistent demand for sunscreen or daily care compositions for everyday use that provide effective sun protection and meet consumer needs regarding protective performance, overall convenience, and, in particular, stability. Specifically, the object of this invention is to provide effective and stable sunscreen or daily care compositions.

[0006] It has been unexpectedly discovered that improved stability can be achieved with sunscreen or daily care compositions with photoprotection according to the invention, particularly when containing one or more broadband absorbers. In particular, it has also been found that the combination of lactate esters with buffering systems improves the overall solubility of solid UV filters in sufficiently stable sunscreen or daily care compositions with photoprotection. Summary of the Invention

[0007] Therefore, in a first aspect, the present invention provides a sunscreen or daily care composition with photoprotection, comprising:

[0008] (i) at least one lactate, preferably in an amount of 1 to 20 wt.% based on the total weight of the composition, and preferably including lauryl lactate;

[0009] (ii) at least one buffer system;

[0010] (iii) At least one UV filter, preferably at least one organic UV filter;

[0011] The pH of the composition is in the range of 5.5 to 8.0.

[0012] In some embodiments, the pH of the composition is maintained in the range of above 5.5 to 8.0 during a storage period of at least one week at a temperature of about 25°C or about 40°C. In some embodiments, the pH is maintained within a given range during a storage period of at least two weeks, preferably at least four weeks, preferably one year, and preferably two years.

[0013] In some embodiments, at least one lactate ester is selected from the group consisting of: oleyl lactate, lauryl lactate, cetyl lactate, myristyl lactate, glyceryl lactate, tridecyl lactate, stearyl lactate, isostearyl lactate, and benzyl lactate, preferably lauryl lactate.

[0014] In some embodiments, at least one lactate 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.

[0015] In some embodiments, the buffer system is selected from the group consisting of phosphate buffer systems, carbonate buffer systems, acetate buffer systems, citrate buffer systems, ammonium buffer systems, borate buffer systems, triethanolamine buffer systems, and tartrate buffer systems, preferably selected from phosphate buffer systems and carbonate buffer systems.

[0016] In some embodiments, the buffer system (i.e., the whole buffering substance used, typically a combination of acid, base and / or salt) is included in the composition in an amount of about 0.2 wt.-% to 4 wt.-% based on the total weight of the composition, preferably about 0.3 wt.-% to 3 wt.-% and more preferably about 0.4 wt.-% to 2 wt.-% based on the total weight of the composition.

[0017] In some embodiments, at least one UV filter is included in a sunscreen or daily care composition having photoprotection in an amount of 5 to 40 wt.-%, preferably 8 to 35 wt.-%, more preferably 9 to 30 wt.-%, or 9 to 35 wt.-%, even more preferably 9 to 25 wt.-%, and particularly 9 to 20 wt.-%, based on the total weight of the composition.

[0018] In some embodiments, at least one UV filter includes

[0019] (1) A UV filter that is solid at 25°C; or

[0020] (2) A UV filter soluble in at least one cosmetic oil; or

[0021] (3) Organic UV filter; or

[0022] (4) Particulate UV filter.

[0023] In various embodiments, at least one UV filter is solid at 25°C and soluble in at least one cosmetic oil.

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

[0025] In some embodiments, at least one UV filter includes

[0026] - At least one UVA filter, preferably selected from the group consisting of: disodium phenyl dibenzimidazole tetrasulfonate, hexyl 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoate (INCI diethylaminohydroxybenzoyl hexyl benzoate), ethoxyethyl methoxypropylaminocyclohexene cyanoacetate (MCE), 1-(4-(1,1-dimethylethyl)phenyl)-3-(4-methoxyphenyl)propane-1,3-dione (INCI butylmethoxydibenzoylmethane), terephthalamide dicamphor sulfonic acid, and combinations thereof; and / or

[0027] - At least one UVB filter, preferably selected from the group consisting of: 4,4',4''-(1,3,5-triazine-2,4,6-triyltriimino)tri-benzoate tris(2-ethylhexyl) ester (INCI ethylhexyltriazinone), 4,4'-[[6-[[4-[[(1,1-dimethylethyl)amino]carbonyl]phenyl]amino]-1,3,5-triazine-2,4-diyl]diimino]bis-benzoate bis(2-ethylhexyl) ester (INCI diethylhexylbutamidotriazinone), phenylbenzimidazole sulfonic acid, and combinations thereof; and / or

[0028] - At least one broadband UV filter, preferably selected from the group consisting of: bis-ethylhexyloxyphenol 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-disiloxyl]propyl]phenol (INCI cresoltrazol trisiloxane), 2,2'-methylenebis[6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol] (INCI methylenebis-benzotriazolyltetramethylbutylphenol), phenyl bis-diphenyltriazine (PBDT), and combinations thereof; and / or

[0029] - At least one organic particulate UV filter, preferably selected from the group consisting of: 2,2'-methylenebis[6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol] (INCI methylenebis-benzotriazolyltetramethylbutylphenol), 2,4,6-tris(biphenyl-4-yl)-1,3,5-triazine (INCI triphenyltriazine), 1,1'-(1,4-piperazinediyl) ) bis[1-[2-[4-(diethylamino)-2-hydroxybenzoyl]phenyl]-methyl ketone (INCI bis-(diethylaminohydroxybenzoylbenzoyl)piperazine), 5,6,5',6'-tetraphenyl-3-3'-(1,4-phenylene)bis(1,2,4-triazine) (INCI phenylene bis-diphenyltriazine, PBDT), micronized 1,4-bis(benzoxazol-2'-yl)benzene and combinations thereof; and / or

[0030] - At least one inorganic UV filter, preferably selected from the group consisting of: titanium dioxide, zinc oxide, iron oxide, cerium oxide and mixtures thereof.

[0031] In various embodiments, the sunscreen or daily care composition with photoprotection comprises at least one UV filter selected from the following: bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT), diethylaminohydroxybenzoylhexylbenzoate (DHHB), methoxypropylaminocyclohexene cyanoacetate ethoxyethyl ester (MCE), butylmethoxydibenzoylmethane (BMDBM), ethylhexyl triazine ketone (EHT), methylene bis-benzotriazolyl tetramethylbutylphenol (MBBT), tri-biphenyltriazine (TBPT), and any combination of two or more thereof.

[0032] In some embodiments, at least one broadband UV filter (e.g., BEMT) is preferably included in the sunscreen or daily care composition in an amount of 0.5% to 10% by weight based on the total weight of the composition.

[0033] In some embodiments, the composition is free from parabens, phenoxyethanol, and at least one or more organic UV filter compounds selected from the group consisting of homomenthyl salicylate, ethylhexyl methoxycinnamate, octocrylene, and ethylhexyl salicylate.

[0034] In some embodiments, the composition further comprises at least one additive, preferably selected from the group consisting of: emulsifiers, emollients, viscosity modifiers (thickeners), stabilizers, sensory enhancers, humectants, film-forming agents, UV scattering compounds, adjuvants, preservatives, fragrances, and combinations thereof.

[0035] In another aspect, this document provides the use of at least one lactate or a combination of at least one lactate with at least one buffering system for improving the stability of sunscreen or daily care compositions having photoprotection, the compositions comprising at least one UV filter, preferably a solid UV filter at 25°C and / or a UV filter soluble in at least one cosmetic oil and / or an organic UV filter and / or a 1,3,5-triazine-based UV filter.

[0036] In another aspect, this document provides the use of at least one lactate or a combination of at least one lactate with at least one buffering system for improving the sensory properties and / or spreadability and / or for reducing viscosity and / or for reducing oiliness of sunscreen or daily care compositions with photoprotection, the compositions comprising at least one UV filter, preferably a UV filter that is solid at 25°C and / or soluble in at least one cosmetic oil and / or an organic UV filter and / or a 1,3,5-triazine-based UV filter.

[0037] In another aspect, this document also provides the use of at least one lactate or a combination of at least one lactate with at least one buffering system for improving the solubility of at least one UV filter, preferably a solid UV filter at 25°C and / or a UV filter soluble in at least one cosmetic oil and / or a 1,3,5-triazine-based UV filter, in sunscreen or daily care compositions with photoprotection. Attached Figure Description

[0038] Figure 1 Results regarding pH stability obtained when stored at 25°C for formulations containing the following: 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).

[0039] Figure 2 Results regarding pH stability obtained when stored at 40°C are described for formulations containing the following: 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).

[0040] Figure 3 Results regarding pH stability obtained when stored at 25°C are described for formulations containing the following: lauryl lactate without buffer (control, formulation E in Table 2 of Experimental Section), lauryl lactate and phosphate buffer (formulation F in Table 2 of Experimental Section according to the invention), or lauryl lactate and carbonate buffer (formulation G in Table 2 of Experimental Section according to the invention).

[0041] Figure 4 Results regarding pH stability obtained when stored at 40°C are described for formulations containing the following: lauryl lactate without buffer (control, formulation E in Table 2 of Experimental Section), lauryl lactate and phosphate buffer (formulation F in Table 2 of Experimental Section according to the invention), or lauryl lactate and carbonate buffer (formulation G in Table 2 of Experimental Section according to the invention). Detailed Implementation

[0042] Before describing the preferred embodiments of the present invention in detail, definitions that are important for understanding the present invention are given.

[0043] As used in this specification and the appended claims, unless the context clearly indicates otherwise, the singular form “a / an” also includes the corresponding plural form.

[0044] In the context of this invention, the terms “about” and “approximately” indicate a range of precision that, as will be understood by those skilled in the art, still ensures the technical effect of the features discussed. These terms typically indicate a deviation from the indicated value of ±20%, preferably ±15%, more preferably ±10%, and even more preferably ±5%.

[0045] It should be understood that the term "comprising" is not limiting. For the purposes of this invention, the term "consisting of" is considered a preferred embodiment of the term "composed of". If a group is defined below as including at least a certain number of embodiments, this means that a group preferably consisting only of those embodiments is also covered.

[0046] Furthermore, the terms “first,” “second,” “third,” or “(i),” “(ii),” “(iii),” “(iv),” etc., used in the specification and claims are used to distinguish similar elements and are not necessarily used to describe a sequential or chronological order. It should be understood that such terms are interchangeable where appropriate, and the embodiments of the invention described herein can operate in orders other than those described or illustrated herein.

[0047] As used herein, the term "free from" in the context of the compositions of the invention being free from a specific compound or group of compounds (which may be grouped under a certain set of terms) means that the composition does not contain more than 0.8% of said compound or group of compounds by weight based on the total weight of the composition. Furthermore, it is preferred that the compositions according to the invention do not contain more than 0.5% of said compound or group of compounds by weight, and preferably the composition does not contain said compound or group of compounds at all. The same definition applies to the term "not containing". Furthermore, it should be understood that in the case where the composition does not contain compounds X and Y, the term "free from" or "not containing" means that the composition must be free from both compounds X and Y. In other words, the composition may be free from any compound selected from X and Y.

[0048] When referring to the composition and the weight percentage of the components contained therein, it should be understood that, according to the invention, the total amount of the components does not exceed 100% (± 1%, due to rounding).

[0049] It should be understood that the present invention is not limited to the specific methods, schemes, reagents, etc., described herein, as these can vary. It should also be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of the invention, which will be limited only by the appended claims. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art.

[0050] The term "sunscreen composition" refers to any topical product that absorbs and can further reflect some portion of UV radiation. Therefore, the term "sunscreen composition" should be understood to include not only sunscreen compositions but also any cosmetic composition that provides UV protection. The term "topical product" refers to a product applied to the skin and can refer to, for example, sprays, emulsions, creams, oils, or gels. Sunscreen compositions may contain one or more active UV filters, such as organic or inorganic UV filters, as well as other ingredients or additives, such as emulsifiers, emollients, viscosity modifiers, stabilizers, preservatives, or fragrances.

[0051] The sunscreen compositions of the present invention can be formulated in particular as water-in-oil (W / O) or oil-in-water (O / W) dispersions, vesicle dispersions of ionic or nonionic amphiphilic lipids, gels, solid rods or aerosol formulations.

[0052] The term "daily care composition" refers to any topical product intended for daily use, with or without UV protection. In the case of UV protection, it absorbs and can further reflect and scatter UV radiation on certain parts of the body and is used as a daily care product for the human body (e.g., face or body), and is referred to in the context of this invention as a "daily care composition with photoprotection." The daily care compositions with photoprotection of this invention typically contain one or more active agents, such as organic and / or inorganic UV filters; and other ingredients or additives, such as emulsifiers, emollients, viscosity modifiers, stabilizers, sensory enhancers, humectants, film-forming agents, UV-scattering compounds, adjuvants, preservatives, or fragrances. According to this invention, suitable daily care compositions with photoprotection are, for example, leave-on facial and body care products. Suitable leave-on facial and body products are, for example, makeup preparations (or cosmetics) and skin care preparations.

[0053] Suitable makeup preparations include, for example, face cosmetics in the form of day cream or powder, face powder (loose or compacted), dry or wet cosmetics such as blush or cream cosmetics, eye care preparations such as eyeshadow preparations, mascara, eyeliner, eye cream or eye repair cream; and lip care preparations such as lipstick, lip gloss, lip liner, nail polish and sunscreen.

[0054] Suitable skin care preparations include, for example, moisturizing, improving, and lifting preparations. The listed daily care compositions may be in the form of creams, ointments, pastes, foams, gels, emulsions, powders, cosmetics, sprays, sticks, or aerosols.

[0055] As used herein, the term "UV filter" refers to an organic or inorganic compound that can absorb, further reflect, and scatter UUV radiation caused by sunlight. UV filters can be classified as UV-A, UV-B, or broadband filters based on their UV protection profiles. Preferably, the term "UV filter" includes any UV filter or a component thereof as defined in Annex VI of Regulation (EC) 1223 / 2009 of the European Parliament (version of November 11, 2022). As used herein, the term "1,3,5-triazine UV filter" refers to a UV filter that includes a 1,3,5-triazine chemical moiety in its structure. Examples of such compounds are well known and widely used in the art.

[0056] The definition of “broadband” protection (also known as broad-spectrum or wide-range protection) can be based on, for example, “critical wavelength” or UVA-PF (UVA protection factor). For broadband coverage, both UV-B and UV-A protection must be provided. According to US requirements, a critical wavelength of at least 370 nm is needed to achieve broad-spectrum protection. Furthermore, the European Commission recommends that all sunscreens should have a UVA protection factor of at least one-third of the stated sun protection factor (SPF); for example, if a sunscreen composition has an SPF of 30, the UVA protection factor must be at least 10.

[0057] The term "critical wavelength" is defined as a wavelength at which the area under the UV protection curve (protection percentage relative to wavelength) accounts for 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 a sunscreen composition is not limited to the wavelength of UV-B (i.e., the wavelength of 290-320 nm), but extends to 370 nm, such that 90% of the total area under the protection curve in the UV region is reached at 370 nm.

[0058] As used herein, the term "Sun Protection Factor (SPF)" indicates the degree to which a sunscreen composition protects the skin from erythema (sunburn) caused primarily by UV-B radiation. Specifically, this factor indicates how long protected skin can be exposed to sunlight without getting sunburned, compared to untreated skin. For example, if a sunscreen composition with an SPF of 15 is applied evenly to the skin of someone who typically gets sunburned after 10 minutes in the sun, the sunscreen allows that person to stay in the sun 15 times longer. In other words, SPF 15 means that 1 / 15 of the intense UV radiation will reach the skin, assuming a concentration of 2 mg / cm².2 When applying a thick, even amount of sunscreen.

[0059] The water-soluble UV filter has a solubility in water of at least 2% by weight, preferably at least 3% by weight, and more preferably at least 5% by weight. Unless otherwise indicated, all solubilities given herein are under standard conditions, i.e., room temperature (25°C) and atmospheric pressure (1013 mbar).

[0060] The oil-soluble UV filter, or "UV filter soluble in at least one cosmetic oil," has a solubility of at least 2% by weight, preferably at least 5% by weight, and more preferably at least 7% by weight in, for example, the following common cosmetic oils: benzoic acid C 12 -C 15 - Alkyl esters, dibutyl adipate, diisopropyl sebacate, phenethyl benzoate, cocoyl octanoate ( / decanoate), propyl heptyl octanoate, caprylic / decanoic triglyceride, cocoyl glyceride, propylene glycol dioctanoate / didecanoate, butylene glycol dioctanoate / didecanoate, triethyl citrate, isopropyl myristate, isopropyl palmitate, phenox, ethyl octanoate, isopropyl lauroyl sarcosine, or dioctyl carbonate.

[0061] If a UV filter is defined herein as "oil-soluble" or "soluble in at least one cosmetic oil," this means that it has a solubility of at least 2% by weight in any one or more of the aforementioned cosmetic oils, i.e., in one or more of the following: benzoic acid C 12 -C 15 - Alkyl esters, dibutyl adipate, diisopropyl sebacate, phenethyl benzoate, cocoyl caprylate ( / decanoate), propyl heptaethyl caprylate, caprylic / decanoic triglyceride, coconut glyceride, propylene glycol dicaprylate / didecanoate, butylene glycol dicaprylate / didecanoate, triethyl citrate, isopropyl myristate, isopropyl palmitate, phenoxy, ethyl caprylate, isopropyl lauroyl sarcosinate, and dioctyl carbonate. In some embodiments, it may have the given solubility in all of the listed cosmetic oils.

[0062] The term "insoluble particulate organic UV filter" refers to a UV filter that is insoluble in both water and cosmetic oils. This may mean that its solubility in water and the aforementioned cosmetic oils is less than 2% by weight, for example, less than 1% by weight.

[0063] As used herein, the term "sensory performance" refers to the sensory characteristics of a formulation after it has been applied to a user's skin, such as those assessed by a group of test subjects against a reference formulation. Sensory characteristics include a variety of factors that users typically consider, such as rheology, spreadability, viscosity, whitening, skin absorption, oiliness, waxiness, and overall acceptability.

[0064] As used in this article, "spreadability" refers to the ease with which a user can apply a formulation to the skin and spread it out as a thin film. Users generally prefer formulations that spread easily across the skin surface.

[0065] As used herein, "tackiness" refers to the degree of stickiness of an application product after application, which can be tested, for example, by measuring the adhesion of a defined amount of gritty material applied to a substrate covered with sunscreen and examining how much gritty material remains on the substrate after the defined amount is shaken. The substrate can be in vivo (e.g., human forearm skin) or external (PMMA sheet). Users typically expect the tackiness to be as low as possible after application.

[0066] As used herein, "oiliness" refers to a quality that is oily or greasy, and the user's related sensory perception. It can be tested, for example, by applying an oil-absorbing sheet to a defined area of ​​skin covered with a defined amount of sunscreen and observing (e.g., visually) the level of oil absorption by the sheet.

[0067] The inventors of this invention have unexpectedly discovered that the addition of at least one lactate ester to at least one buffer system as defined herein enhances the solubility and performance of the UV filter contained in the composition, while providing enhanced stability of sunscreen or daily care compositions with photoprotection.

[0068] Therefore, in a first aspect, the present invention provides a sunscreen or daily care composition with photoprotection, comprising:

[0069] (i) at least one lactate ester;

[0070] (ii) at least one buffer system; and

[0071] (iii) At least one UV filter;

[0072] The pH of the composition is in the range of 5.5 to 8.0, such as pH 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.

[0073] The pH of a formulation can be measured by any means known and available to those skilled in the art. Unless otherwise indicated, the pH of the formulation itself (e.g., as an o / w emulsion) filled and stored in a glass bottle is measured herein by potentiometric method at 20°C using a pH meter (Mettler-Toledo) equipped with a glass electrode.

[0074] In some embodiments, when stored at a temperature of about 25°C, the pH of the composition is stable in the range of 5.5 to 8.0, for example, pH values ​​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, such as when stored at a temperature of about 25°C, maintaining a pH range of 7.0 to 8.0. The pH range can 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.

[0075] In the context of this invention, the phrase "the pH of the composition is stably within the pH range of..." means maintaining the pH value within the corresponding range.

[0076] In some embodiments, the pH of the sunscreen or daily care composition with photoprotection according to the invention is stable in the range of 7.0 to 8.0 when stored at a temperature of about 25°C.

[0077] In some embodiments, when stored at a temperature of about 40°C, the pH of the composition is stable in the range above 5.0 to 8.5, for example, pH values ​​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 in the range of 6.5 to 8.5.

[0078] "Storing" or "storage" of the composition according to the invention means keeping the corresponding composition (e.g., in packaged form) after its production / preparation, for example in a bulk container or a consumer-suitable container (including (glass bottles) bottles, tubes, flasks, etc.), wherein the keeping includes the transport of the composition, and further includes keeping the composition in its corresponding package or container for further use by the consumer after the initial opening of the package or container (e.g., after first use).

[0079] In some specific embodiments, the pH of the composition is at least one week, preferably at least two weeks, more preferably at least three weeks, or 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, 4. Stably maintained within the above-given ranges or given values, such as 6.5 to 8.0, during a storage period of 0, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51 or 52, 60, 80, 90, 100 or 104 weeks, particularly at any temperature between 25°C and / or 40°C, including temperatures varying within that range during the storage period.

[0080] In the context of this invention, the term "lactate" refers to a compound formed in the esterification reaction of lactic acid and an alcohol compound (ROH) in a condensation reaction, wherein R can generally be selected from (hetero)alkyl, (hetero)aryl, (hetero)alkyl(hetero)aryl and (hetero)aryl(hetero)alkyl, preferably selected from alkyl.

[0081] The term "alkyl" refers to a monovalent straight-chain, branched, or cyclic hydrocarbon group comprising 1 to 30 carbon atoms, preferably a straight-chain or branched group comprising 5 to 30 carbon atoms. The term "alkyl" further includes both substituted and unsubstituted alkyl groups, wherein "substituted" means that one or more hydrogen atoms are replaced by one or more chemical groups selected from -OH and -COOH. Alkyl groups as defined herein can be saturated or unsaturated. The term "heteroalkyl" refers to an alkyl group as defined herein in which at least one carbon atom is replaced by nitrogen, sulfur, or oxygen. Exemplary alkyl groups as defined herein 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-undecyl, n-dodecyl, n-tetradecyl, n-heptadecyl, n-heptadecyl, n-octadecyl, n-eicosyl, n-docodecyl, n-undecyl, n-dodecyl, n-tetradecyl, n-heptadecyl, n-octadecyl, n-eicosyl, n-docodidecyl, and n-tetracosyl.

[0082] The term "aryl" refers to a hydrocarbon group having one or more polyunsaturated carbon rings (e.g., 4n + 2 delocalized electrons) with aromatic characteristics and comprising six carbon atoms up to about 14, wherein the group is located on a carbon atom of the aromatic ring. Exemplary aryl groups include phenyl, naphthyl, and indenyl. The term "heteroaryl" refers to an aryl group, as defined herein, in which at least one carbon atom is substituted by nitrogen, sulfur, or oxygen.

[0083] In various embodiments, R is selected from alkyl and aryl, preferably alkyl, as defined herein. In various embodiments, R is a saturated or unsaturated straight-chain or branched alkyl group and contains 5 to 25 carbon atoms, preferably 8 to 22 carbon atoms.

[0084] In various embodiments, the lactate ester is 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 benzyl lactate, as well as glycol lactates such as propylene glycol lactate. In preferred embodiments, the lactate ester is selected from the group consisting of: oleyl lactate, lauryl lactate, cetyl lactate, myristyl lactate, glyceryl lactate, tridecyl lactate, stearyl lactate, isostearyl lactate, and benzyl lactate. In some embodiments, the lactate ester is selected from the group consisting of oleyl lactate, lauryl lactate, and myristyl lactate, preferably lauryl lactate. Mixtures of any of the above are also contemplated. Lauryl lactate is particularly preferred. In some embodiments, the lactate is not myristyl lactate or glyceryl lactate.

[0085] In various embodiments, at least one lactate ester is present in an amount of about 1 to 20 wt.-% based on the total weight of the composition, such as 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.-%. 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.-%. Therefore, the range includes 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 lactate, preferably lauryl lactate, in the composition is at least 1.2 wt.-%, preferably at least 1.5 wt.-%.

[0086] In the context of this invention, the term "buffer system" refers to a combination of a weak acid and its conjugate base or a weak base and its conjugate acid. In various embodiments, the buffer system is selected from the group consisting of: phosphate buffer systems (e.g., disodium hydrogen phosphate / sodium dihydrogen phosphate), carbonate buffer systems (e.g., sodium bicarbonate / carbonic acid), acetate buffer systems (e.g., acetic acid / sodium acetate), citrate buffer systems (e.g., citric acid / sodium citrate), ammonium buffer systems (e.g., ammonia / ammonium chloride), borate buffer systems (e.g., boric acid / sodium borate), triethanolamine buffer systems, and tartrate buffer systems (e.g., tartaric acid / potassium hydrogen tartrate), preferably selected from phosphate buffer systems, such as sodium dihydrogen phosphate / sodium hydrogen phosphate and potassium dihydrogen phosphate / potassium hydrogen phosphate; and carbonate buffer systems, such as sodium bicarbonate / carbonic acid, potassium bicarbonate / carbonic acid, and sodium carbonate / sodium bicarbonate. In some embodiments, the buffer system is a phosphate buffer containing potassium phosphate and disodium phosphate. In some other embodiments, the buffer system is a carbonate buffer containing sodium carbonate and sodium bicarbonate. In some embodiments, the buffer system is a phosphate buffer composed of potassium phosphate and disodium phosphate. In some other embodiments, the buffer system is a carbonate buffer composed 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 comprises a tris(hydroxymethyl)aminomethane buffer system; however, in various embodiments, the buffer system is not a tris(hydroxymethyl)aminomethane buffer system and may even be free of tris(hydroxymethyl)aminomethane. In various embodiments, the compositions of the present invention do not contain a combination of a tris(hydroxymethyl)aminomethane buffer system, 1% lauryl lactate, and more than 15 wt.% organic UV filter.

[0087] In various embodiments, at least one buffering system is present in an amount of about 0.2 to 4 wt.% based on the total weight of the composition, 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.% (the amount of the corresponding buffering substance, which may be any combination of acids, bases, and salts disclosed herein for the purposes described herein), preferably in an amount of about 0.3 to 3 wt.%, more preferably in an amount of about 0.4 to 2 wt.%.

[0088] In various embodiments, the amount of the buffer system or buffer system components can be selected to obtain and maintain the desired pH of the composition. The pH ranges described above apply to such embodiments. In various embodiments, the amounts of lactate and buffer system are selected based on the desired pH and can be adjusted accordingly. The weight ratio of lactate to buffer system (component) can be in the range of 5:1 to 1:5, preferably 3:1 to 1:3.

[0089] The lactate and buffer system can be premixed before the addition of any other components. In various embodiments, such premixes already have a pH as defined herein or have been adjusted to have such a pH.

[0090] As at least one UV filter, UVA, UVB, and / or different broadband UV filters can be used. Suitable UV filters can be organic or inorganic, particulate or non-particulate. Non-particulate UV filters can be miscible or soluble in a given solvent (such as water or cosmetic oil). In some cases, they can be water-soluble or oil-soluble, as defined herein. Compared with non-particulate UV filters, the term "particulate UV filter" refers to UV filters that are substantially insoluble in water or (cosmetic) oil, i.e., their solubility in water and the aforementioned cosmetic oils is less than 2% by weight, for example, less than 1% by weight. The term "organic particulate UV filter" refers to UV filters that can be micronized and dispersed as particles in water or oil due to their low water and low oil solubility. Thus, "non-particulate" means those filters that are miscible or soluble in oil and / or water. Oil and / or water-soluble filters, as defined herein, are those that do not exist as solids in the composition but can be solids at 25°C (in themselves, i.e., if not formulated with other compounds).

[0091] In various embodiments, the UV filter to be included in the composition as defined herein is a UV filter that is solid at 25°C and / or soluble in at least one cosmetic oil. In various embodiments, they possess both characteristics, i.e., being solid at 25°C and soluble in at least one cosmetic oil. In various embodiments, the composition comprises at least one organic UV filter.

[0092] In various embodiments, the composition does not contain lactate encapsulated in microcapsules; that is, the lactate is contained in the composition in a non-encapsulated (i.e., free) form. Microcapsules containing lauryl lactate and UV filters such as EHT (in encapsulated form) are specifically excluded. Therefore, the compositions of the present invention preferably do not contain microcapsules containing lactate (such as lauryl lactate) and UV filters.

[0093] In various embodiments, at least one UV filter included in the composition of the present invention comprises or is a non-particulate oil-soluble UV filter.

[0094] In various embodiments, at least one UV filter included in the composition of the present invention comprises or is a non-particulate water-soluble UV filter.

[0095] In various embodiments, at least one UV filter included in the composition of the present invention comprises, or is a particulate oil-insoluble and water-insoluble UV filter.

[0096] In various embodiments, at least one UV filter includes or is an organic UV filter.

[0097] In various embodiments, at least one UV filter includes organic, solid, and oil-soluble UV filters. In various alternative or cumulative embodiments, at least one UV filter includes organic, solid, and particulate UV filters.

[0098] The compositions of the present invention may contain any one or more of the above types of UV filters, either alone or in combination.

[0099] Suitable UVA filters can be selected from the following groups: disodium phenyl dibenzimidazole tetrasulfonate (DPDT), hexyl 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoate (INCI diethylaminohydroxybenzoyl hexyl benzoate, DHHB), 1-(4-(1,1-dimethylethyl)phenyl)-3-(4-methoxyphenyl)propane-1,3-dione (INCI butylmethoxydibenzoylmethane, also known as avobenzone, BMDBM), terephthalimide dicamphor sulfonic acid (TDSA), methoxypropylaminocyclohexene cyanoacetate ethoxyethyl ester (MCE), and combinations thereof.

[0100] Suitable UVB filters can be selected from the following groups: 4,4',4''-(1,3,5-triazine-2,4,6-triyltriimino)tri-benzoic acid-tris(2-ethylhexyl) ester (INCI ethylhexyltriazinone, EHT), 4,4'-[[6-[[4-[[(1,1-dimethylethyl)amino]carbonyl]phenyl]amino]-1,3,5-triazine-2,4-diyl]diimino]bis-benzoic acid-bis(2-ethylhexyl) ester (INCI diethylhexylbutamidotriazinone, DBT), phenylbenzimidazole sulfonic acid, and combinations thereof.

[0101] Suitable broadband UV filters can be selected from the following groups: 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-disiloxyl]propyl]phenol (INCI cresoltrazol trisiloxane, DTS), 2,2′-methylenebis[6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol] (INCI methylenebis-benzotriazolyltetramethylbutylphenol, MBBT), phenyl bis-diphenyltriazine (PBDT), benzophenone-3 and combinations thereof.

[0102] Suitable organic particulate UV filters (i.e., insoluble organic UV filters) can be selected from the group consisting of: 2,2'-methylenebis[6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol] (INCI methylenebis-benzotriazolyltetramethylbutylphenol, MBBT), 2,4,6-tris(biphenyl-4-yl)-1,3,5-triazine (INCI terphenyltriazine, TBPT), 1, 1'-(1,4-piperazinidyl)bis[1-[2-[4-(diethylamino)-2-hydroxybenzoyl]phenyl]-methyl ketone (INCI bis-(diethylaminohydroxybenzoylbenzoyl)piperazine), 5,6,5',6'-tetraphenyl-3-3'-(1,4-phenylene)bis(1,2,4-triazine) (INCI phenylene bis-diphenyltriazine; PBDT), 1,4-bis(benzoxazol-2'-yl)benzene, and combinations thereof. Further examples of suitable organic particulate UV filters are described, for example, in WO 9703643, WO 2009077356, and WO2015155158. Preferably, the particulate UV filter has a particle size D of less than 2000 nm, preferably less than 1000 nm, as determined by light scattering. N 50, of which D N 50 refers to the particle size value, where half of the population is below this value and half is above this value; that is, the median of the particle size distribution.

[0103] Inorganic UV filters include titanium dioxide, zinc oxide, iron oxide, cerium oxide, and mixtures thereof. In various embodiments, inorganic UV filters can be used as nanomaterials. In this regard, it should be understood that the term "nanomaterial" follows European Commission Recommendation 2011 / 696 / EU. Thus, in nanomaterials, based on a size distribution of quantity, 50% of the particles are less than 100 nm, including constituent particles in aggregates or clusters. In another embodiment of the invention, inorganic UV filters can be used as non-nanomaterials. Thus, in non-nanomaterials, based on a size distribution of quantity, more than 50% of the particles are greater than 100 nm. Mixtures of nano and non-nano inorganic UV filters can also be used. Furthermore, inorganic UV filters can be coated or uncoated. If present, titanium dioxide is preferably coated, as uncoated titanium dioxide is photocatalytic and should be avoided in sunscreens. In the context of inorganic UV filters, suitable coatings can be organic and / or inorganic, and are disclosed, for example, in WO 2023 / 036749 A1.

[0104] In various embodiments, the composition comprises bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT).

[0105] In various embodiments, the composition comprises diethylaminohydroxybenzoylhexylbenzoate (DHHB).

[0106] In various embodiments, the composition comprises butyl methoxydibenzoylmethane (BMDBM).

[0107] In various embodiments, the composition comprises ethylhexyltriazine (EHT).

[0108] In various embodiments, the composition comprises methylenebis-benzotriazolyltetramethylbutylphenol (MBBT).

[0109] In various embodiments, the composition comprises tri-biphenyltriazine (TBPT).

[0110] In various embodiments, the composition comprises methoxypropylaminocyclohexene imine cyanoacetate ethoxyethyl ester (MCE).

[0111] In various embodiments, the composition does not contain octyl cyanobenzyl acrylate.

[0112] In various embodiments, the composition does not contain ethylhexyl salicylate.

[0113] In all embodiments, the composition does not contain homosalate.

[0114] In various embodiments, the composition does not contain ethylhexyl methoxycinnamate (EHMC).

[0115] In various embodiments, the composition does not contain any two or more, preferably three or more, or more preferably all of octyl cyanobenzyl acrylate, ethylhexyl salicylate, humosalilate, and ethylhexyl methoxycinnamate (EHMC).

[0116] In various embodiments, the composition comprises at least one UVA filter (such as DHHB, BMDBM, or MCE) and at least one UVB filter (such as EHT).

[0117] In various embodiments, the composition comprises at least one broadband UV filter (such as BEMT) and at least one UVA filter (such as DHHB, BMDBM, or MCE).

[0118] In various embodiments, the composition comprises at least one broadband UV filter (such as BEMT) and at least one UVB filter (such as EHT).

[0119] In various embodiments, the composition comprises at least one broadband UV filter (such as BEMT), at least one UVA filter (such as DHHB, BMDBM, or MCE), and at least one UVB filter (such as EHT).

[0120] 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). Therefore, the composition may comprise combinations of MBBT with BEMT, MBBT with EHT, and MBBT with DHHB, BMDBM, or MCE. Furthermore, the particulate UV filter (such as MBBT) may be used in combination with any combination of UVA, UVB, and broadband UV filters disclosed in the various embodiments above.

[0121] Specifically, the composition may comprise a combination of the following UV filters.

[0122] (1) DHHB and EHT;

[0123] (2) DHHB and MBBT,

[0124] (3) DHHB and TBPT;

[0125] (4) DHHB and PBSA;

[0126] (5) DHHB and PBDT;

[0127] (6) DHHB and TDSA;

[0128] (7) BEMT and DHHB;

[0129] (8) EHT and MBBT;

[0130] (9) EHT and TBPT;

[0131] (10) EHT and PBSA;

[0132] (11) EHT and BEMT;

[0133] (12) EHT and PBDT;

[0134] (13) EHT and TDSA;

[0135] (14) MBBT and TBPT;

[0136] (15) MBBT and PBSA;

[0137] (16)MBBT and TDSA;

[0138] (17) MBBT and PBDT;

[0139] (18) MBBT and BEMT;

[0140] (19) TBPT and PBSA;

[0141] (20) TBPT and BEMT;

[0142] (21) TBPT and PBDT;

[0143] (22) TBPT and TDSA;

[0144] (23) DHHB, EHT and MBBT;

[0145] (24) DHHB, EHT and TBPT;

[0146] (25) DHHB, EHT and PBSA;

[0147] (26) DHHB, EHT and BEMT;

[0148] (27) DHHB, EHT and PBDT;

[0149] (28) DHHB, EHT and TDSA;

[0150] (29) BEMT, EHT and MBBT;

[0151] (30) BEMT, EHT and TBPT,

[0152] (31) BEMT, EHT and PBSA;

[0153] (32) BEMT, EHT and BEMT;

[0154] (33) BEMT, EHT and PBDT;

[0155] (34) BEMT, EHT and TDSA;

[0156] (35) EHT, MBBT and TBPT;

[0157] (36) EHT, MBBT and PBSA;

[0158] (37) EHT, MBBT and BEMT;

[0159] (38) EHT, MBBT and PBDT;

[0160] (39) EHT, MBBT, and TDSA; or

[0161] (40) MBBT, TBPT and PBSA;

[0162] In all the embodiments listed above with different UV filter combinations, except for those explicitly listed, the composition may not contain other organic UV filters, or even other UV filter substances. This may mean that at least one organic UV filter other than TDSA is composed of the combinations listed above.

[0163] In various embodiments, the sunscreen or daily care composition with photoprotection comprises a total weight of 4 or 5 to 40 wt.-% based on the total weight of the sunscreen or daily care composition, 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.-%, 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.-%. UV filters in the form of 9 to 20 wt.-%, or 9 to 30 wt.-%, or 9 to 35 wt.-%, or 9 to 25 wt.-%, for example, 9 to 20 wt.-%. The lower limit can be 4, 5, 6, 7, or 8 wt.-%, and the upper limit can be 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, or 35 wt.-%.

[0164] In various embodiments, the composition comprises at least one broadband UV filter, such as BEMT, preferably in an amount of 0.5% to 10% by weight based on the total weight of the sunscreen or daily care composition, 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.-%, more preferably in an amount of 2% to 5% by weight.

[0165] In various embodiments, the composition comprises at least one UVA filter, such as DHHB, BMDBM, or MCE, preferably in an amount of 0.5% to 10% by weight based on the total weight of the sunscreen or daily care composition, 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.-.

[0166] In various embodiments, the composition comprises at least one UVB filter, such as EHT, preferably in an amount of 0.5% to 10% by weight based on the total weight of the sunscreen or daily care composition, 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.-.

[0167] In various embodiments, the composition comprises at least one particulate UV filter, such as MBBT, PBDT, or TBPT, preferably in an amount of 0.5% to 10% by weight based on the total weight of the sunscreen or daily care composition, 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.-.

[0168] In various embodiments in which the composition comprises BEMT, BEMT is included in an amount of 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.-%.

[0169] In various embodiments in which the composition comprises EHT, EHT is included in an amount of 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.

[0170] In various embodiments in which the composition comprises PBSA, PBSA is contained in an amount of 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.

[0171] In various embodiments in which the composition comprises DHHB, DHHB is contained in an amount of 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.-%.

[0172] In various embodiments in which the composition comprises TBPT, TBPT is contained in an amount of 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.

[0173] In various embodiments in which the composition comprises BMDBM, BMDBM is included in an amount of 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.

[0174] In various embodiments in which the composition comprises MBBT, MBBT is included in an amount of 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.

[0175] In various embodiments in which the composition comprises PBDT, PBDT is contained in an amount of 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.-%.

[0176] In various embodiments, the weight ratio of 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.

[0177] In various embodiments, the weight ratio of at least one UVA filter to at least one UVB filter or at least one particulate UV filter can be in the range of 1:5 to 5:1, for example 1:3 to 3:1.

[0178] In various embodiments, the weight ratio of at least one UVB filter to at least one particulate UV filter can be in the range of 1:5 to 5:1, for example, 1:3 to 3:1.

[0179] In various embodiments, the weight ratio of 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.

[0180] In various embodiments, the weight ratio of lactate, preferably lauryl lactate, to 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. This weight ratio can also be applied to the weight ratio of lactate, preferably lauryl lactate, to at least one organic UV filter (e.g., the total organic UV filter in the composition). This weight ratio can also be applied to the weight ratio of lactate, preferably lauryl lactate, to at least one solid and / or oil-soluble UV filter (e.g., the total solid and / or oil-soluble UV filter in the composition). This weight ratio can also be applied to the weight ratio of lactate, preferably lauryl lactate, to at least one triazine UV filter (e.g., the total triazine UV filter in the composition).

[0181] In some embodiments, the composition is free from parabens, phenoxyethanol, and at least one or more organic UV filter compounds selected from the group consisting of homomethyl salicylate, ethylhexyl methoxycinnamate, octyl cyanobenzyl acrylate, and ethylhexyl salicylate. In some embodiments, the sunscreen or daily care composition with photoprotection is free from parabens. In various embodiments, the sunscreen or daily care composition with photoprotection is free from phenoxyethanol. In various embodiments, the sunscreen or daily care composition with photoprotection is free from both parabens and phenoxyethanol. In various embodiments, the sunscreen or daily care composition with photoprotection is free from homomethyl salicylate. In various embodiments, the sunscreen or daily care composition with photoprotection is free from ethylhexyl methoxycinnamate. In various embodiments, the sunscreen or daily care composition with photoprotection is free from octyl cyanobenzyl acrylate. In various embodiments, the sunscreen or daily care composition with photoprotection is free from ethylhexyl salicylate. In various embodiments, the sunscreen or daily care composition with photoprotection is free of high-methyl salicylate, ethylhexyl methoxycinnamate, octyl cyanobenzyl acrylate, and ethylhexyl salicylate. In various embodiments, the sunscreen or daily care composition with photoprotection is free of parabens, phenoxyethanol, and organic UV filter compounds selected from the group consisting of high-methyl salicylate, ethylhexyl methoxycinnamate, octyl cyanobenzyl acrylate, and ethylhexyl salicylate.

[0182] In various embodiments, the sunscreen or daily care composition with photoprotection provides an SPF of more than 15, preferably more than 30. In another preferred embodiment of the invention, the sunscreen or daily care composition with photoprotection provides an SPF of more than 50, preferably more than 60. In yet another preferred embodiment of the invention, the sunscreen or daily care composition with photoprotection provides an SPF of more than 90. SPF can be determined according to any method known in the art.

[0183] Furthermore, in conjunction with the above embodiments, it should be understood that sunscreen or daily care compositions with photoprotection may contain at least one additive.

[0184] In one embodiment, at least one additive is selected from the group consisting of: emulsifiers, emollients, viscosity modifiers (thickeners), stabilizers, sensory enhancers, humectants, film-forming agents, UV scattering compounds, adjuvants (such as vitamins), antioxidants, chelating agents, preservatives, fragrances, and combinations thereof.

[0185] Preferred O / W emulsifiers include, but are not limited to,

[0186] - Glucose derivatives, such as cetearyl glucoside, arachidonic glucoside, lauryl glucoside, polyglyceryl-3-methyl glucose distearate, and methyl glucose sesquistearate;

[0187] - Sucrose derivatives, such as sucrose polystearate and sucrose palmitate;

[0188] - Sorbitol derivatives, such as polysorbate derivatives;

[0189] Inulin derivatives, such as inulin lauryl carbamate;

[0190] - Glyceryl esters of fatty acids, such as glyceryl stearate, glyceryl stearate SE, and glyceryl stearate citrate;

[0191] - Glutamic acid derivatives, such as sodium stearoyl glutamate;

[0192] - Sulfosuccinic acid derivatives, such as disodium cetearyl sulfosuccinate;

[0193] - Phosphoric acid derivatives, such as cetyl potassium phosphate, cetyl alcohol polyether-10 phosphate ester, and C20-22 alkyl phosphate ester;

[0194] - Polyglycerol-based fatty acid esters, such as polyglycerol-3-diisostearate, polyglycerol-2-dipolyhydroxystearate; polyglycerol-10-stearate

[0195] -Oxyolefinated fatty alcohols, such as cetearyl alcohol polyether-20, stearyl alcohol polyether-21, behenyl alcohol polyether-25

[0196] -Oxylenized fatty acids, such as PEG-100 stearate

[0197] -Oxylenized organic modified silicone / polysiloxane / polyalkyl / polyether copolymers and derivatives

[0198] -Ethoxylated fatty acid soaps

[0199] - Phospholipid-based, such as lecithin derivatives.

[0200] Preferred emulsifiers for forming W / O emulsions include, but are not limited to,

[0201] - Glycerides of fatty acids, such as glyceryl oleate and sorbitol laurate.

[0202] -Sorbitol esters, such as sorbitol oleate

[0203] - Polyglycerol-based fatty acid esters, such as polyglycerol-3-diisostearate, polyglycerol-2-dipolyhydroxystearate, and polyglycerol-4-isostearate.

[0204] -Oxyolefinated fatty alcohols, such as stearyl alcohol polyether-2

[0205] -Oxyolefinated fatty acids, such as PEG-30 dimerized hydroxystearate

[0206] - Organically modified silicone / polysiloxane / polyalkyl / polyether copolymers and derivatives, such as cetyl polydimethylsiloxane copolyols, cetyl PEG / PPG-10 / 1 polydimethylsiloxane, and PEG-10 polydimethylsiloxane.

[0207] Preferred emollients include

[0208] -Esters of straight-chain or branched fatty acids with straight-chain or branched fatty alcohols, such as propyl heptyl octanoate, cocoyl octanoate, isopropyl myristate, and ethylhexyl palmitate.

[0209] -Esters of aromatic carboxylic acids with straight-chain or branched fatty alcohols, such as C12-C15-alkyl benzoates, ethylhexyl benzoate, and phenylethyl benzoate;

[0210] - Dicarboxylic acid esters with straight-chain or branched-chain alcohols, such as dibutyl adipate, dioctyl carbonate, and diisopropyl sebacate;

[0211] Esters of α-hydroxycarboxylic acids with straight-chain or branched fatty alcohols;

[0212] - Esters of straight-chain or branched fatty acids with polyols, such as butanediol dioctanoate / didecanoate;

[0213] - Monoglycerides, diglycerides, and triglycerides based on C6-C18 fatty acids, such as caprylic / capric triglycerides and cocoyl alcohol triglycerides;

[0214] -Gerbert alcohols, such as octyldodecynol;

[0215] - Hydrocarbons, such as hydrogenated polyisobutylene, mineral oil, squalene, and isohexadecane;

[0216] -Ethers, such as dioctyl ether;

[0217] - Silicone derivatives (organically modified polysiloxanes), such as dimethyl polysiloxane and cyclic silicones.

[0218] Preferred lipophilic thickeners include, but are not limited to,

[0219] - Fatty alcohols, such as cetyl alcohol, cetearyl alcohol, stearyl alcohol; betaine alcohol

[0220] - Fatty acids, such as stearic acid; palmitic acid

[0221] - Fatty acid esters, such as myristyl stearate, pentaerythritol distearate, and cetyl palmitate; tribehenin and dextrin palmitate.

[0222] - Waxes, such as beeswax, carnauba wax, microcrystalline wax, ceresin, and ozocerite; rice bran wax and sunflower wax.

[0223] - Hydrogenated vegetable oil, hydrogenated castor oil, hydrogenated vegetable glycerides

[0224] - Hydrogenated castor oil / sebacic acid copolymer

[0225] - Derivatives based on silica, such as silica and dimethylsilyl alkyl silica.

[0226] Hydrophilic stabilizers / thickeners include, but are not limited to,

[0227] -Natural gums, such as xanthan gum, tara gum, carrageenan gum

[0228] - Silicate derivatives, such as magnesium aluminum silicate;

[0229] - Cellulose derivatives, such as hydroxypropyl cellulose and microcrystalline cellulose

[0230] - Starch derivatives, such as hydroxypropyl starch phosphate.

[0231] Hydrophilic stabilizers / thickeners include, but are not limited to,

[0232] -Natural gums, such as xanthan gum, tara gum, carrageenan gum, guar gum, agar gum, alginate, and gellan gum.

[0233] - Silicate derivatives, such as magnesium aluminum silicate;

[0234] - Cellulose derivatives, such as hydroxypropyl cellulose and microcrystalline cellulose

[0235] - Starch derivatives, such as hydroxypropyl starch phosphate

[0236] - Polyacrylates or homopolymers or polyacrylamides of network acrylic acid, such as carbomer, acrylate copolymers, acrylate / acrylic acid C10-C30-alkyl ester crosspolymers, acrylate / behenol polyether-25 methacrylate copolymers.

[0237] It may also contain UV-protective scattering compounds. These include, but are not limited to:

[0238] - Microcrystalline cellulose;

[0239] -Calcium carbonate;

[0240] 2-hydroxyapatite;

[0241] -Silica

[0242] - Hollow spheres, such as styrene / acrylate copolymers.

[0243] Other components may fall into the categories of film-forming agents and film-forming enhancers. These compounds include, but are not limited to,

[0244] - Hydrogenated dimerized dilinoleyl / dimethyl carbonate copolymer;

[0245] -Diisostearoyl polyglycerol-3-dimeric dilinoleate;

[0246] - Polyglycerol-3-stearate / sebacate crosspolymer;

[0247] - Cellulose derivatives, such as methylcellulose and ethylcellulose;

[0248] -Octaylglycerol / Sebacic acid copolymer.

[0249] Preferred sensory enhancers include

[0250] - Polyamide derivatives, such as nylon-12;

[0251] - Polymethyl methacrylate;

[0252] -Silicon dioxide;

[0253] -Mica;

[0254] - Polymethylsilsesquioxane;

[0255] -Polyethylene;

[0256] - Starch derivatives, such as aluminum octenyl succinate;

[0257] - Polydimethylsiloxane derivatives;

[0258] - Boron nitride;

[0259] -HDI / trimethylolhexyl lactone crosslinked polymer.

[0260] Preferred wetting agents include polyols, such as:

[0261] - Glycerin;

[0262] -Butanediol;

[0263] -Propylene glycol;

[0264] -Sorbitol

[0265] -β-glucan;

[0266] -1,2-pentanediol;

[0267] -1,2-hexanediol;

[0268] -1,2-octanediol;

[0269] -1,2-decanediol;

[0270] -2-Methyl-1,3-propanediol.

[0271] Preferred adjuvants include

[0272] - Ethanol

[0273] -dye

[0274] - Pigments, such as iron oxide

[0275] -Tocopherol derivatives;

[0276] -Retinol derivatives;

[0277] -Ascorbic acid derivatives;

[0278] -Biospermyl alcohol;

[0279] -Allantoin;

[0280] -Panthenol;

[0281] - Chelating agents (EDTA, EDDS, EGTA, phytic acid, piroctone olamine);

[0282] -Ethylhexylglycerin;

[0283] -Hydroxyacetophenone;

[0284] - Caprylhydroxymic acid.

[0285] - Propellants, such as propane, butane, isobutylene, and dimethyl ether;

[0286] - Styrene / PVP or styrene-acrylamide copolymer;

[0287] - Insect repellents, such as butyl acetyl aminopropionate.

[0288] Preferred preservatives include

[0289] -Benzyl alcohol;

[0290] - Gingerone.

[0291] Preferred fragrances are selected from the group consisting of: limonene, citral, linalool, α-isomethylionone, geraniol, citronellol, 2-isobutyl-4-hydroxy-4-methyltetrahydropyran, 2-tert-butyl-pentylcyclohexyl acetate, 3-methyl-5-phenyl-1-pentanol, 7-acetyl-1,1,3,4,4,6-hexamethyltetrahydronaphthalene, adipate diester, α-pentylcinnamaldehyde, α-methylionone lanone, pentyl-C-butylphenylmethylpropionaldehyde, cinnamaldehyde, amyl salicylate, pentylcinnamyl alcohol, anisyl alcohol, benzoin, benzyl alcohol, benzyl benzoate, benzyl cinnamate, benzyl salicylate, bergamot oil, bitter orange oil, butylphenylmethylpropanol, cardamom oil, cedrol, cinnamaldehyde, cinnamyl alcohol, citronellol crotonate, lemon oil, coumarin, diethyl succinate, ethyl linalool, eugenol, evernia extracts of *Furfuracea*, extracts of *Evernia prunastri*, farnesol, guaiac oil, hexylcinnamaldehyde, hexyl salicylate, hydroxycitronellol, lavender oil, lemon oil, linaylacetate, citrus oil, peppermint PCA, methyl heptenone, nutmeg oil, rosemary oil, sweet orange oil, terpineol, coumarin oil, triethyl citrate, vanillin, and combinations thereof.

[0292] In conjunction with the above preferred embodiments, it should be understood that if a sunscreen or daily care composition with photoprotection contains two or more additives, then a combination of additives as defined above is also part of the present invention.

[0293] The final formulation of a sunscreen or daily care composition with photoprotection can be available in a variety of forms, such as: as a liquid formulation, 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, polymer-based emulsion, and all types of microemulsions. The final formulation can be provided in various forms, such as gel, cream, lotion, or emulsion; as a powder; as a stick; as a spray (a spray with propellant gas or a pump-driven spray); as a foam; or as a paste.

[0294] Typically, sunscreen or daily care compositions with photoprotection contain more than 5% by weight of water based on the total weight of the composition, such as in the range of about 5.5 to 95 wt.-%, such as in the range of 10 to 90 wt.-%, such as in the range of 15 to 85 wt.-%.

[0295] For example, when formulated as a water-in-oil or oil-in-water dispersion, the optional cosmetically acceptable carrier preferably comprises 5% to 50% oil phase, 1% to 10% emulsifier, and 30% to 90% water, each by weight based on the total weight of the carrier. The oil phase may comprise any oil conventionally used in cosmetic formulations.

[0296] Based on the above embodiments, it should be understood that sunscreen or daily care compositions are particularly suitable for protecting the skin from UV radiation.

[0297] Therefore, the present invention further relates to sunscreen or daily care compositions as defined herein for protecting human skin from UV radiation. The present invention further relates to a method of protecting human skin from UV radiation by applying a sunscreen or daily care composition as defined herein.

[0298] In another aspect, the present invention relates to the use of a combination of at least one lactate and at least one buffering system for improving the stability of a sunscreen or daily care composition having photoprotection, the composition comprising at least one UV filter.

[0299] In some such embodiments, the combination is used to improve the pH stability of the composition and maintain the pH of the composition in the range of 5 to 8.0, such as pH values ​​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.

[0300] In some other embodiments, the combination is used to improve the pH stability of the composition and maintain the pH of the composition in the range of 5 to 8.0 when stored at a temperature of about 25°C.

[0301] In some other embodiments, the combination is used to improve the pH stability of the composition and maintain the pH of the composition in the range of 6.5 to 8.0 when stored at a temperature of about 25°C.

[0302] In some other embodiments, the combination is used to improve the pH stability of the composition and maintain the pH of the composition in a range above 5.0 to 8.5 when stored at a temperature of about 40°C, such as 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 in the range of 6.5 to 8.5.

[0303] In some specific embodiments, the combination is used to improve the pH stability of the composition and maintain the pH of the composition in the range of 5.5 to 8.0 when stored at a temperature of about 25°C for at least one week, preferably at least two weeks, more preferably at least three weeks, or 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. Therefore, in some embodiments, the storage period 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, 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, 52, 55, 60, 80, 90, 100, or 104 weeks.

[0304] In various embodiments, the combination is used to improve the pH stability of the composition and maintain the pH of the composition in the range of 5.5 to 8.5 when stored at a temperature of about 40°C for a period of time of at least one week, preferably at least two weeks, more preferably at least three weeks, or even more preferably at least four weeks.

[0305] In another aspect, the invention also relates to the use of a lactate such as lauryl lactate or a combination of at least one lactate with at least one buffering system for improving the solubility of at least one UV filter in a sunscreen or daily care composition, the UV filter preferably being selected from the group consisting of UV filters that are solid at 25°C and / or soluble in at least one cosmetic oil, and / or UV filters based on 1,3,5-triazine.

[0306] In another aspect, the invention also relates to the use of lactic esters, such as lauryl lactate, or combinations of at least one lactic ester with at least one buffering system for improving the stability of sunscreen or daily care compositions comprising at least one UV filter, preferably selected from the group consisting of: UV filters that are solid at 25°C and / or soluble in at least one cosmetic oil, and / or organic UV filters and / or 1,3,5-triazine-based UV filters, and / or organic particulate filters.

[0307] In another aspect, the present invention relates to the use of lactic esters, such as lauryl lactate, or combinations of at least one lactic ester with at least one buffering system for improving the sensory properties of sunscreen or daily care compositions comprising at least one UV filter, preferably selected from the group consisting of: UV filters that are solid at 25°C and / or soluble in at least one cosmetic oil, and / or organic UV filters, and / or 1,3,5-triazine-based UV filters, and / or organic particulate filters.

[0308] In another aspect, the present invention relates to the use of lactic esters, such as lauryl lactate, or combinations of at least one lactic ester with at least one buffering system for improving the spreadability of sunscreen or daily care compositions comprising at least one UV filter, preferably selected from the group consisting of: UV filters that are solid at 25°C and / or soluble in at least one cosmetic oil, and / or organic UV filters, and / or 1,3,5-triazine-based UV filters, and / or organic particulate filters.

[0309] In another aspect, the present invention relates to lactic esters, such as lauryl lactate, or combinations of at least one lactic ester with at least one buffering system for reducing the viscosity of sunscreen or daily care compositions comprising at least one UV filter, preferably selected from the group consisting of: UV filters that are solid at 25°C and / or soluble in at least one cosmetic oil, and / or organic UV filters, and / or 1,3,5-triazine-based UV filters, and / or organic particulate filters.

[0310] In another aspect, the present invention relates to the use of lactic esters, such as lauryl lactate, or combinations of at least one lactic ester with at least one buffering system for reducing the oiliness of sunscreen or daily care compositions comprising at least one UV filter, preferably selected from the group consisting of: UV filters that are solid at 25°C and / or soluble in at least one cosmetic oil, and / or organic UV filters, and / or 1,3,5-triazine-based UV filters, and / or organic particulate filters.

[0311] The buffering system used in the described application may be those disclosed above regarding the compositions of the present invention. In various embodiments, it refers to a type and / or amount of buffering substance suitable for providing a pH of water-containing formulations in the range of 5.5 to 8.5.

[0312] As used herein, “improved solubility” preferably refers to a measurable increase in solubility relative to the same system in which no lactate esters (such as lauryl lactate) and / or no buffering system or different cosmetic oils are used.

[0313] As used herein, “improved stability” preferably refers to a measurable increase in stability relative to the same system in which no lactate esters (such as lauryl lactate) and / or no buffering system or different cosmetic oils are used.

[0314] Similarly, as used herein, “improved sensory properties,” “improved spreadability,” and “reduced viscosity / oiliness” preferably refer to measurable changes relative to the same system in which no lactate esters (such as lauryl lactate) and / or no buffering system or different cosmetic oils are used.

[0315] The inventors have discovered that, compared to compositions that do not contain lactates as described herein, lactates, optionally in combination with suitable buffering systems, provide increased stability, increased solubility of UV filters, improved sensory properties, improved spreadability, reduced viscosity, and / or reduced oiliness.

[0316] It should be understood that the above examples of sunscreen or daily care compositions with photoprotection are also applicable to the uses and application methods according to the present invention, and vice versa.

[0317] The present invention is further illustrated by the following non-limiting examples. Example

[0318] Example 1

[0319] Table 1: Test Preparations (AD)

[0320]

[0321] Phosphate buffer, pH 7 to 7.5

[0322] Borate buffer, pH 9 to 10

[0323] Carbonate buffer, pH 8 to 9

[0324] Heat portions A and B to 75°C with magnetic stirring. Add portion A to B with stirring, then homogenize using an UltraTurrax apparatus. Cool to below 40°C, then add portion C, followed by portion D.

[0325] The results regarding pH stability obtained using the above formulations are described in... Figure 1 (Storage temperature 25°C) and Figure 2 (Storage temperature 40°C). Lauryl lactate, in combination with different buffer systems, provides stable formulations, even at elevated temperatures and over extended storage periods.

[0326] Example 2

[0327] Table 2: Test formulation EG

[0328]

[0329] The pH of the phosphate buffer solution should be between 7 and 7.5.

[0330] The carbonate buffer solution should have a pH between 8 and 9.

[0331] Parts A and B are heated to 75°C with magnetic stirring. Part A is added to B with stirring, and then homogenized using an UltraTurrax apparatus. The mixture is cooled to below 40°C, and then part C is added, followed by part D (prepared beforehand by mixing), and finally part E.

[0332] The results regarding pH stability obtained using the above formulations are described in... Figure 3 (Storage temperature 25°C) and Figure 4 (Storage temperature 40°C). Lauryl lactate, in combination with various buffer systems, provides stable formulations, even at elevated temperatures over extended storage periods. When sunscreens contain the filter phenylbenzimidazole sulfonic acid, the pH must be maintained above 6.5 to prevent recrystallization.

Claims

1. A sunscreen or daily care composition with photoprotection, comprising: (i) at least one lactate ester, in an amount of about 1 to 20 wt.-% based on the total weight of the composition, wherein the at least one lactate ester preferably includes lauryl lactate; (ii) at least one buffer system; and (iii) at least one organic UV filter; The pH of the composition is in 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 in the range of 5.5 to 8.0 during a storage period of at least one week at a temperature of about 25°C and / or about 40°C.

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

4. A 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: phosphate buffer systems, carbonate buffer systems, acetate buffer systems, citrate buffer systems, ammonium buffer systems, borate buffer systems, triethanolamine buffer systems, and tartrate buffer systems, preferably selected from phosphate buffer systems and carbonate buffer systems; and / or (2) The at least one buffer system is present in an amount of about 0.2 to 4 wt.-% based on the total weight of the composition, preferably about 0.3 to 3 wt.-% and more preferably about 0.4 to 2 wt.-% based on the total weight of the composition.

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

6. A sunscreen or daily care composition with photoprotection according to any one of the preceding claims, wherein, The at least one UV filter includes (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) Particulate UV filter.

7. A 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 is soluble in at least one cosmetic oil.

8. A sunscreen or daily care composition with photoprotection according to any one of the preceding claims, wherein, The composition contains - At least one UVA filter, preferably selected from the group consisting of: disodium phenyl dibenzimidazole tetrasulfonate, hexyl 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoate (INCI diethylaminohydroxybenzoyl hexyl benzoate), 1-(4-(1,1-dimethylethyl)phenyl)-3-(4-methoxyphenyl)propane-1,3-dione (INCI butylmethoxydibenzoylmethane), methoxypropylaminocyclohexene imide cyanoacetate ethoxyethyl ester (MCE), terephthalic acid 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)tri-benzoic acid-tris(2-ethylhexyl) ester (INCI ethylhexyltriazinone), 4,4'-[[6-[[4-[[(1,1-dimethylethyl)amino]carbonyl]phenyl]amino]-1,3,5-triazine-2,4-diyl]diimino]bis-benzoic acid-bis(2-ethylhexyl) ester (INCI diethylhexylbutamidotriazinone), phenylbenzimidazole sulfonic acid, and combinations thereof; and / or - At least one broadband UV filter, preferably selected from the group consisting of: bis-ethylhexyloxyphenol 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-disiloxyl]propyl]phenol (INCI cresoltrazol trisiloxane), 2,2'-methylenebis[6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol] (INCI methylenebis-benzotriazolyltetramethylbutylphenol), phenyl bis-diphenyltriazine (PBDT), and combinations thereof; and / or - At least one organic particulate UV filter, preferably selected from the group consisting of: 2,2'-methylenebis[6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol] (INCI methylenebis-benzotriazolyltetramethylbutylphenol), 2,4,6-tris(biphenyl-4-yl)-1,3,5-triazine (INCI triphenyltriazine), 1,1'-(1,4-piperazinediyl) bis[1-[2-[4-(diethylamino)-2-hydroxybenzoyl]phenyl]-methyl ketone (INCI bis-(diethylaminohydroxybenzoylbenzoyl)piperazine), 5,6,5',6'-tetraphenyl-3-3'-(1,4-phenylene)bis(1,2,4-triazine) (INCI phenylene bis-diphenyltriazine; PBDT), micronized 1,4-bis(benzoxazol-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. A 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), diethylaminohydroxybenzoylhexylbenzoate (DHHB), methoxypropylaminocyclohexene cyanoacetate ethoxyethyl ester (MCE), butylmethoxydibenzoylmethane (BMDBM), ethylhexyl triazine ketone (EHT), methylene bis-benzotriazolyl tetramethylbutylphenol (MBBT), tri-biphenyltriazine (TBPT), and any combination of two or more thereof.

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

11. A sunscreen or daily care composition with photoprotection according to any one of the preceding claims, wherein, (1) The composition is free from parabens, phenoxyethanol, and at least one or more organic UV filter compounds selected from the group consisting of humosafil, ethylhexyl methoxycinnamate, octyl cyanadiene acrylate, and ethylhexyl salicylate; and / or (2) The composition further comprises at least one additive, which is preferably selected from the group consisting of: emulsifiers, emollients, viscosity modifiers (thickeners), stabilizers, sensory enhancers, film-forming agents, UV scattering compounds, auxiliaries, preservatives, fragrances and combinations thereof.

12. Use of at least one lactate or a combination of at least one lactate and at least one buffering system for improving the stability of a sunscreen or daily care composition having photoprotection, the composition comprising at least one organic UV filter.

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

14. Use of at least one lactate or a combination of at least one lactate and at least one buffering system for improving the sensory properties of a sunscreen or daily care composition having photoprotection, the composition comprising at least one organic UV filter.

15. Use of at least one lactate or a combination of at least one lactate and at least one buffering system for improving the spreadability of a sunscreen or daily care composition with photoprotection, the composition comprising at least one organic UV filter.

16. Use of at least one lactate or a combination of at least one lactate and at least one buffering system for reducing the stickiness / oiliness of a sunscreen or daily care composition with photoprotection, the composition comprising at least one organic UV filter.

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