Sunscreen compositions

Abstract

The present invention relates sunscreen compositions comprising ethylhexyl triazone and 2-ethylhexyl 2-hydroxycyclohexanecarboxylate as well as to the use of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate as effective solubiliser for ethylhexyl triazone.

Description

[0001] SUNSCREEN COMPOSITIONS

[0002] The present invention relates sunscreen compositions comprising bis ethylhexyloxyphenol methoxyphenyl triazine as well as to the use of 2-ethylhexyl 2-hydroxycyclohexane- carboxylate as effective solubiliser for ethylhexyl triazone.

[0003] The harmful effect of the ultraviolet part of sun radiation, i.e. radiation of a wavelenght of 280 to 400nm on the skin is generally known. Thus modern sunscreens contain different UVA, UVB and / or broadband filters to protect the skin effectively from the harmful effects of UV radiation.

[0004] Among these filters solid lipophilic organic filters are particularly efficient. Despite their effectiveness, however, such solid lipophilic organic filters often suffer from the drawback of being only moderately soluble in commonly used cosmetic oils, such as e.g. ester oils or fatty alcohols. In addition if not sufficiently solubilized, these filters have a tendency to recrystallize in the final product which is highly unwanted as this leads to a reduced efficacy and, in addition, to undesirable sensorial properties.

[0005] Triazine derivatives such as in particular ethylhexyl triazone, a UV-filter exhibiting an exceptional high absorptivity in the UVB range (280-320 nm), are known to exhibit particular low solubilities in cosmetic oils. Known cosmetic oils used as solvent for ethylhexyl triazone can dissolve a maximum of about 15 wt.-% of this filter, which translates to a maximum of approximately 1.5 wt.-% of dissolved UV filter substance in the final sunscreen. Hence today, this significantly limits its use levels.

[0006] The article "Spezielle Cyclohexanderivate zur Anwendung in Konsumgutern und zur Stabilisierung von Konsumgutern ", published online with IP.com on 10 October 2014, describes special cyclohexan derivatives that can be used in a variety of technical products, household products or in cosmetic and pharmaceutical agents. Amongst the long list of cyclohexan derivatives 2-hydroxy-cyclohexanecarboxylic acid 2-ethyl-hexyl ester is mentioned. The article also refers to mixtures of the cyclohexan derivatives and provides an extensive list of formulations said to include 1 .0 wt.% of a mixture. The article states that the cyclohexan derivatives can be used against microbial contamination, but does not mention anything about solubilisation characteristics. Thus, there is an ongoing need for efficient solubilizers for ethylhexyl triazone in order to be able to enhance its use levels in sunscreens. Such solvents should in addition be easily accessible in large scale from readily available bulk chemicals.

[0007] Ethylhexyl salicylate is an organic compound used as an active ingredient in sunscreens to absorb UVB light. Even though being a rather effective solubilizer for certain solid UV-filters such as bis ethylhexyloxyphenol methoxyphenyl triazine and butyl methoxydibenzoylmethane, it is only able to dissolve ethylhexyl triazone in amounts up approximately 3 wt.-%.

[0008] Ethylhexyl salicylate is an ester formed by the condensation of salicylic acid with 2-ethylhexanol. As it is widely used in the cosmetic industry it is readily available in bulk quantities from various suppliers.

[0009] WO1 3091775 discloses 2-ethylhexyl 2-hydroxycyclohexanecarboxylate (also known as 2-hydroxy-cyclohexanecarboxylic acid 2-ethyl-hexyl ester, in the following also referred to as 2-EHCHC), the hydrogenation product of ethylhexyl salicylate, amongst various other cyclohexanol compounds, as an antimicobial active compound.

[0010] Surprisingly it has now been found that 2-ethylhexyl 2-hydroxycyclohexanecarboxylate is a very efficient solvent for ethylhexyl triazone.

[0011] Thus, in a first embodiment, the present invention provides sunscreen compositions comprising ethylhexyl triazone and 2-ethylhexyl 2-hydroxycyclohexanecarboxylate.

[0012] Another subject matter of the invention is directed to the use of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate for solubilizing ethylhexyl triazone in sunscreen composition.

[0013] In a further embodiment, the present invention relates to a method of solubilizing a content of ethylhexyl triazone in a sunscreen composition, said method comprising adding to said sunscreen composition a content of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate suffcient to solubilize the content of ethylhexyl triazone. Unless defined otherwise or clearly indicated by context, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art.

[0014] Throughout the present specification and the accompanying claims, the words "comprise" and "include" and variations such as "comprises", "comprising", "includes" and "including" are to be interpreted inclusively. That is, these words are intended to convey the possible inclusion of other elements or integers not specifically recited, where the context allows.

[0015] The articles “a” and “an” are used herein to refer to one or to more than one (i.e. to one or at least one) of the grammatical object of the article. By way of example, “an element” may mean one element or more than one element. When referring to a noun (e.g. a compound, an additive, etc.) in the singular, the plural is meant to be included.

[0016] Unless explicitly indicated otherwise, the various embodiments of the invention described herein can be cross-combined.

[0017] It is well understood by a person skilled in the art, that the sunscreen compositions according to the present invention may advantageously comprise an oil phase which comprises 2- ethylhexyl 2-hydroxycyclohexanecarboxylate in which the ethylhexyl triazone is to be dissolved, e.g. before being admixed with the water phase to form an emulsion.

[0018] Thus, in a further embodiment the present invention relates to a method for the preparation of a sunscreen composition comprising ethylhexyl triazone, said method encompassing the step of dissolving ethylhexyl triazone in an oil phase comprising an effective amount of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate.

[0019] The term ‘effective amount’ refers to an amount sufficient to dissolve, to increase and / or to enhance the solubility of ethylhexyl triazone in the oil phase, beyond what it would be in the absence of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate.

[0020] Preferably, ethylhexyl triazione and optionally other solid oil soluble ingredients are dissolved in the oil phase while the oil phase is heated up to a temperature of at least 30°C, more preferably at least 40 °C, most preferably at least 50°C, such as at least 60°C under stirring. The term ‘oil phase’ as used herein refers to any ingredient of sunscreen compositions that are not water-soluble such as in particualt fats, waxes and / or liquid oils and which are conventionally used in sunscreens.

[0021] Ethylhexyl triazone (also referred to herein as EHT) is also known as 2 4-[[4,6-bis[[4-(2- ethylhexoxy-oxomethyl)phenyl]amino]-1 ,3,5-triazin-2-yl]amino]benzoic acid 2-ethylhexyl ester (chemical name) or octyl triazone (Cas No: 88122-99-0). EHT is suggested for use in sun care, day care, alphabetic products such as BB cream and whitening products. It is e.g. comercially available as PARSOL® EHT from DSM Nutritional Products Ltd.

[0022] The sunscreen compositions according to the invention are preferably sunscreen compositions comprising equal to or more than 0.1 wt.% of EHT, more preferably equal to or more than 0.5 wt.% of EHT, even more preferably equal to or more than 1.0 wt.% of EHT, still more preferably equal to or more than 2.0 wt.% of EHT and, if so desired, even equal to or more than 3.0 wt.% of EHT, based on the total weight of the composition.

[0023] For practical reasons, the sunscreen composition may comprise equal to or less than 10.0 wt.% of EHT, more suitably equal to or less than 5.0 wt.% of EHT, based on the total weight of the composition.

[0024] In all embodiments of the present invention, the amount of EHT in the sunscreen compositions according to the present invention can advantageously be selected in the range from 0.1 to 5 wt.-%, preferably in the range from 0.25 to 5 wt.-%, most preferably in the range from 0.5 to 5 wt.-%, based on the total weight of the composition. Further suitable ranges are selected in the range from 0.3 to 5 wt.-%, from 0.4 to 5 wt.-%, from 0.5 to 5 wt.-%, from 1 to 5 wt.-%, from 0.1 to 4 wt.-%, 0.25 to 4 wt.-%, from 0.5 to 4 wt.-%, from 1 to 4 wt.-%, from 0.1 to 3 wt.-%, from 0.25 to 3 wt.-%, from 0.5 to 3 wt.-%, and from 1 to 3 wt.-%, .-%, based on the total weight of the composition.

[0025] 2-Ethylhexyl 2-hydroxycyclohexanecarboxylate has the formula (I) below, including the stereoisomers (la) and (lb):

[0026] 2-Ethylhexyl 2-hydroxycyclohexanecarboxylate can be used either in the form of the stereoisomers such as rel-2-ethyl hexyl (1 R,2R)-2-hydroxycyclohexanecarboxylate or rel-2- ethylhexyl (1 R,2S)-2-hydroxycyclo-hexanecarboxylate as well as in any mixtures thereof. Preferably, in all embodiments of the present invention a mixture of stereoisomers (la) and (lb) is used. Even more preferably 2-ethylhexyl 2-hydroxycyclohexanecarboxylate is used in the form of a cis- / trans-mixture, i.e. a mixture of (la) and (lb), selected in the range of 1 :1 to 10:1 , preferably 2:1 to 7.5:1 , most preferably 3:1 to 5:1.

[0027] 2-Ethylhexyl 2-hydroxycyclohexanecarboxylate is obtainable as outlined in example 7 of WO2013091775 by hydrogenation of ethylhexyl salicylate in the presence of a RH-C-5% catalyst.

[0028] In all embodiments of the present invention, preferably the amount of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate in the in the sunscreen compositions according to the present invention is at least 1 wt.%, more preferably at least 2 wt.-%, most preferably at least 2.5 wt.-%, based on the total weight of the composition. The sunscreen compositions according to the invention are thus preferably sunscreen compositions comprising equal to or more than 1.0 wt.% (weight percent) of 2-Ethylhexyl 2- hydroxycyclohexanecarboxylate, more preferably equal to or more than 2.0 wt.% of 2- Ethylhexyl 2-hydroxycyclohexanecarboxylate, even more preferably equal to or more than 2.5 wt.% of 2-Ethylhexyl 2-hydroxycyclohexanecarboxylate, based on the total weight of the composition. Advantageously the sunscreen compositions according to the invention can be sunscreen compositions comprising equal to or more than 5.0 wt.% of 2-Ethylhexyl 2- hydroxycyclohexanecarboxylate, based on the total weight of the composition.

[0029] For practical reasons, the sunscreen composition may comprise equal to or less than 50.0 wt.% of 2-Ethylhexyl 2-hydroxycyclohexanecarboxylate, more suitably equal to or less than 35.0 wt.% of 2-Ethylhexyl 2-hydroxycyclohexanecarboxylate, most suitably equal to or less than 25.0 wt.% of 2-Ethylhexyl 2-hydroxycyclohexanecarboxylate, based on the total weight of the composition.

[0030] In all embodiments of the present inventon, preferably the amount of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate is less or equal to 35 wt.-%, more preferably less or equal to 30 wt.-%, even more preferably less or equal to 25 wt.-%, based on the total weight of the composition.

[0031] Even more preferably, in all embodiments of the present invention, the amount of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate is selected in the range from 1 to 35 wt.-%,1 to 30 wt.-%, 1 to 25 wt.-%, 1 to 20 wt.-%, 1 to 15 wt.% or 1 to 10 wt.-%, based on the total weight of the composition. Further suitable ranges are from 5 to 35 wt.-%, 10 to 35 wt.-%, 10 to 30 wt.-%, 10 to 25 wt.-%, or from 15 to 25 wt.-%, based on the total weight of the composition.

[0032] In another embodiment of the present invention it is advantageous if the amount of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate in the sunscreen compositions according to the present invention is selected in the range from 1 to 10 wt.-%, more preferably in the range from 1 to 7.5 wt.-%, most preferably from 1 to 5 wt.-%, such as from 2 to 10 wt.-%, from 2.5 to 10 wt.-%from 2 to 7.5 wt.-%, from 2.5 to 7.5 wt.-%, from 2 to 5 wt.-%, or from 2.5 to 5 wt.-%, based on the total weight of the composition.

[0033] In all embodiments of the present invention, preferably the weight-ratio of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate to EHT is selected in the range from 0.1 :1 to 25:1 , preferably in the range from 0.5:1 to 25:1 , most preferably in the range from 0.75:1 to 25:1 , such as in the range from 1 :1 to 25:1.

[0034] In one particular embodiment, preferably the amount (by weight) of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate is > the amount of ethylhexyl triazone. In said embodiment, preferably, the weight-ratio of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate to EHT is selected in the range from 1 :1 to 25:1 , from 2:1 to 25:1 , from 3:1 to 20:1 , or from 3.5:1 to 15:1. Further suitable ratios are from 3.5:1 to 10:1 and from 4:1 to 5:1.

[0035] Also in the uses and methods of the invention, preferably a ratio as above is applied.

[0036] Preferably the sunscreen compositions according to the present invention comprise an oil phase, which oil phase comprises 2-ethylhexyl 2-hydroxycyclohexanecarboxylate; and which oil phase comprises ethylhexyl triazone.

[0037] Preferably the amount of such oil phase within the sunscreen composition is selected in the range from equal to or more than 10 wt.%, more preferably equal to or more than 15 wt.% and even more preferably equal to or more than 20 wt.%, to preferably equal to or less than 75 wt.%, more preferably to equal to or less than 60 % / w / w , even more preferably to equal to or less than 50 wt.%, yet even more preferably to equal to or less than 40 wt.%, based on the total weight of the sunscreen coposition.

[0038] Preferably such oil phase is an oil phase

[0039] - preferably comprising equal to or more than 1.0 wt.% of 2-ethylhexyl 2- hydroxycyclohexanecarboxylate, more preferably equal to or more than 2.0 wt.% of 2- ethylhexyl 2-hydroxycyclohexanecarboxylate, even more preferably equal to or more than 2.5 wt.% of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate, still more preferably equal to or more than 5.0 wt.% of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate, and yet even more preferably equal to or more than 10.0 wt.% of 2-ethylhexyl 2-hydroxycyclohexane- carboxylate, and most preferably equal to or more than 25.0 wt.% of 2-ethylhexyl 2- hydroxycyclohexanecarboxylate, based on the total weight of the oil phase; and / or

[0040] - preferably comprising equal to or more than 0.5 wt.% of EHT, more preferably equal to or more than 1 .0 wt.% of EHT, even more preferably equal to or more than 2.0 wt.% of EHT, still more preferably equal to or more than 5.0 wt.% of EHT, and, if so desired, even equal to or more than 10.0 wt.% of EHT, and even still more preferably equal to or more than 20 wt.% of EHT, based on the total weight of the oil phase. For practical reasons, the oil phase may comprise equal to or less than 40.0 wt.% of EHT, more suitably equal to or less than 30.0 wt.% of EHT, even more suitably equal to or less than 20.0 wt.% of EHT, based on the total weight of the oil phase.

[0041] In addition, the oil phase may comprise equal to or less than 90.0 wt.% of 2-ethylhexyl 2- hydroxycyclohexanecarboxylate, more suitably equal to or less than 70.0 wt.% of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate, even more suitably equal to or less than 50.0 wt.% of ethylhexyl 2-hydroxycyclohexanecarboxylate, based on the total weight of the oil phase.

[0042] The addition of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate may also significantly increase or enhance the solubility of EHT in one or more further solvents for EHT. More particularly, the addition of, for example, 10% of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate to one or more further solvents for EHT may significantly improve the solubility of EHT in said solvent(s).

[0043] Thus, in another embodiment, in particular when 2-ethylhexyl 2-hydroxycyclohexanecarboxylate is used together with one or more further solvents for EHT, the amount (by weight) of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate can also be less than the amount of ethylhexyl triazone. In said embodiment, preferably the weight-ratio of EHT to 2-ethylhexyl 2-hydroxycyclohexanecarboxylate is selected in the range from 1.1 :1 to 5:1 , from 1.2:1 to 4:1 , from 1.3:1 to 3:1 , from 1.1 :1 to 4:1 , from 1.2 to 3:1 or from 1.1 to 2:1.

[0044] The term ‘solvent for EHT’ as used herein refers to any substance, usually a liquid, which is capable of dissolving EHT, thus creating a solution. Preferred solvents for EHT to be combined with 2-ethylhexyl 2-hydroxycyclohexanecarboxylate are the ones which are able to solubilize at least 3 wt.-%, more preferably at least 5 wt.-% of EHT, even more preferably at least 7.5 wt.-% of EHT, such as most preferably at least 10 wt.-% of EHT (at ambient temperature (22°C) and pressure).

[0045] Suitable solvents for EHT are for example octyl methoxycinnamate (up to approx 14 wt.-%), PPG-3 myristyl ether (up to approx. 13wt.-%), PEG-7 Glyceryl Cocoate (up to approx. 10 wt.-%), diisopropyl adipate (up to approx. 9 wt.-%) and fractionated coconut oil (up to approx. 6 wt.-%) as well as any mixtures thereof.

[0046] The term "sunscreen composition" or "sunscreen" as used herein refers to any topical product, which absorbs and which may further reflect and scatter certain parts of UV radiation. Thus, the term "sunscreen composition" is to be understood as not only including sunscreen compositions, but also any other cosmetic compositions that provide UV protection such as in particular daily care compositions.

[0047] As the sunscreen composition according to the invention are intended for topical application, it is well understood that they comprise a physiologically acceptable medium, i.e. a medium compatible with keratinous substances, such as the skin, mucous membranes, and keratinous fibres. In particular, the physiologically acceptable medium is a cosmetically acceptable carrier.

[0048] The term ‘cosmetically acceptable carrier’ as used herein refers to all carriers and / or excipients and / or diluents conventionally used in topical cosmetic compositions such as in particular in skin care preparations.

[0049] The exact amount of carrier will depend upon the actual level of the UV-filter substances and any other optional ingredients that one of ordinary skill in the art would classify as distinct from the carrier (e.g., other active ingredients).

[0050] In an advantageous embodiment, the sunscreen compositions according to the present invention comprise from 50% to 99%, preferably from 60% to 98%, more preferably from 70% to 98%, such as in particular from 80% to 95% of a carrier, based on the total weight of the sunscreen composition.

[0051] In a particular advantageous embodiment, the carrier consists furthermore of at least 30 wt.-%, more preferably of at least 40 wt.-%, most preferably of at least 45 wt.-% of water, such as in particular of 50 to 90 wt.-% of water. Further suitable ranges are from 50 to 75 wt.-%, from 50 to 70 wt.-%, and from 55 to 65 wt.-%.

[0052] In a particular advantageous embodiment, the carrier consists furthermore of at most 75 wt.-%, more preferably of at most 60 wt.-%, most preferably of at most 55 wt.-% of an oil phase, such as in particular of 20-75 wt.-% of an oil phase. Further suitable ranges are from 20 to 60 wt.-%, from 25 to 60 wt.-%, and from 20 to 55 wt.-%, and from 25 to 55 wt.-%.

[0053] In particular, the sunscreen compositions according to the present invention are cosmetic (non-therapeutic) compositions. In one embodiment, the sunscreen compositions according to the present invention are applied to mammalian keratinous tissue such as in particular to human skin or the human scalp and hair.

[0054] The term “cosmetic composition” as used in the present application refers to cosmetic compositions as defined under the heading “Kosmetika” in Rdmpp Lexikon Chemie, 10thedition 1997, Georg Thieme Verlag Stuttgart, New York as well as to cosmetic compositions as disclosed in A. Domsch, “Cosmetic Compositions”, Verlag fur chemische Industrie (ed. H. Ziolkowsky), 4thedition, 1992.

[0055] Preferred sunscreen compositions according to the invention are skin care preparations, decorative preparations, and functional preparations.

[0056] Examples of skin care preparations are, in particular, light protective preparations, anti-ageing preparations, preparations for the treatment of photo-ageing, body lotions, body gels, treatment creams, skin protection ointments, balms, moisturizing gels, moisturizing sprays, face and / or body moisturizers, skin-tanning preparations (i.e. compositions for the artificial / sunless tanning and / or browning of human skin), for example self-tanning creams as well as skin lightening preparations.

[0057] Examples of decorative preparations are, in particular, mascaras or dry and moist make-up formulations.

[0058] Examples of functional preparations are cosmetic or pharmaceutical compositions containing active ingredients such as hormone preparations, vitamin preparations, vegetable extract preparations, anti-ageing preparations, and / or antimicrobial (antibacterial or antifungal) preparations without being limited thereto.

[0059] In a particular embodiment, the sunscreen compositions according to the invention are sun care products (i.e. sunscreens), such as sun protection milks, sun protection lotions, sun protection creams, sun blocks or topical’s or day care creams with or without a SPF (sun protection factor) label. Of particular interest are sun protection creams, sun protection lotions and sun protection milks. The compositions of the invention (including the carrier) may comprise conventional adjuvants and additives, such as preservatives / antioxidants, fatty substances / oils, organic solvents, silicones, thickeners, softeners, emulsifiers, antifoaming agents, aesthetic components such as fragrances, surfactants, fillers, anionic, cationic, nonionic or amphoteric polymers or mixtures thereof, propellants, acidifying or basifying agents, dyes, colorings / colorants, abrasives, absorbents, chelating agents and / or sequestering agents, essential oils, skin sensates, astringents, pigments or any other ingredients usually formulated into such compositions.

[0060] For example, the oil phase may comprise 2-ethylhexyl 2-hydroxycyclohexanecarboxylate, and ethylhexyl triazone, and the oil phase may in addition comprise the above conventional adjuvants and / or additives, such as for example one or more fatty substances and / or essential oils.

[0061] In accordance with the present invention, the compositions according to the invention may comprise further ingredients such as ingredients for skin lightening, tanning prevention, treatment of hyperpigmentation, preventing or reducing acne, wrinkles, lines, atrophy and / or inflammation; chelators and / or sequestrants; anti-cellulites and slimming (e.g. phytanic acid), firming, moisturizing and energizing, self-tanning, soothing agents, as well as agents to improve elasticity and skin barrier and carriers and / or excipients or diluents conventionally used in sunscreen compositions.

[0062] If nothing else is stated, the excipients, additives, diluents, etc. mentioned in the following are suitable for sunscreen compositions according to the present invention. The necessary amounts of the cosmetic adjuvants and additives can, based on the desired product, easily be determined by the skilled person.

[0063] The additional ingredients can either be added to the oil phase, the aqueous phase or separately as deemed appropriate. The mode of addition can easily be adapted by a person skilled in the art.

[0064] Examples of cosmetic excipients, diluents, adjuvants, additives as well as active ingredients commonly used in the skin care industry which are suitable for use in the cosmetic compositions of the present invention are for example described in the International Cosmetic Ingredient Dictionary & Handbook by Personal Care Product Council (http: / / www.personalcarecouncil.org / ), accessible by the online INFO BASE (http: / / online.personalcarecouncil.org / jsp / Home.jsp), without being limited thereto.

[0065] The cosmetically active ingredients useful herein can in some instances provide more than one benefit or operate via more than one mode of action.

[0066] Of course, one skilled in this art will take care to select the above mentioned optional additional ingredients, adjuvants, diluents and additives and / or their amounts such that the advantageous properties intrinsically associated with the combination in accordance with the invention are not, or not substantially, detrimentally affected by the envisaged addition or additions.

[0067] Preferred sunscreen compositions in all embodiments of the present invention are emulsions containing an oil phase and an aqueous phase such as in particular an 0 / W, W / 0, Si / W, W / Si, O / W / O, W / 0 / W multiple or a pickering emulsions. The amount of the oil phase (i.e. the phase containing all oils and fats) present in such emulsions is preferably at least 10 wt.-%, such as in the range from 10 to 60 wt.-%, preferably in the range from 15 to 50 wt.-%, most preferably in the range from 15 to 40 wt.-%, based on the total weight of the composition.

[0068] According to one even more preferred embodiment, the sunscreen compositions according to the present invention as outlined herein are 0 / W emulsions comprising an oil phase dispersed in an aqueous phase in the presence of an 0 / W emulsifier. The preparation of such 0 / W emulsions is well known to a person skilled in the art and illustrated in the examples.

[0069] In one advantageous embodiment, the 0 / W emulsifier is a phosphate ester emulsifier. Among the preferred phosphate ester emulsifier are 08-10 Alkyl Ethyl Phosphate, 09-15 Alkyl Phosphate, Ceteareth-2 Phosphate, Ceteareth-5 Phosphate, Ceteth-8 Phosphate, Ceteth-10 Phosphate, Cetyl Phosphate, C6-10 Pareth-4 Phosphate, C12-15 Pareth-2 Phosphate, C12- 15 Pareth-3 Phosphate, DEA-Ceteareth-2 Phosphate, DEA-Cetyl Phosphate, DEA-Oleth-3 Phosphate, Potassium cetyl phosphate, Deceth-4 Phosphate, Deceth-6 Phosphate and Trilaureth-4 Phosphate. A particular phosphate ester emulsifier according to the invention is potassium cetyl phosphate e.g. commercially available as Amphisol® K at DSM Nutritional Products Ltd Kaiseraugst. Further suitable O / W emulsifiers according to the present invention encompass PEG 30 Dipolyhydroxystearate, PEG-4 Dilaurate, PEG-8 Dioleate, PEG-40 Sorbitan Peroleate, PEG- 7 Glyceryl Cocoate, PEG-20 Almond Glycerides, PEG-25 Hydrogenated Castor Oil, Glyceryl Stearate (and) PEG-100 Stearate , PEG-7 Olivate, PEG-8 Oleate, PEG-8 Laurate, PEG-60 Almond Glycerides, PEG-20 Methyl Glucose Sesquistearate, PEG-40 Stearate, PEG-100 Stearate, PEG-80 Sorbitan Laurate, Steareth-2, Steareth-12, Oleth-2, Ceteth-2, Laureth-4, Oleth-10, Oleth-10 / Polyoxyl 10 Oleyl Ether, Ceteth-10, lsosteareth-20, Ceteareth-20, Oleth- 20, Steareth-20, Steareth-21 , Ceteth-20, lsoceteth-20, Laureth-23, Steareth-100, glycerylstearatcitrate, glycerylstearate (self-emulsifying), stearic acid, salts of stearic acid, polyglyceryl-3-methylglycosedistearate. Further suitable emulsifiers are sorbitan oleate, sorbitan sesquioleate, sorbitan isostearate, sorbitan trioleate, Lauryl Glucoside, Decyl Glucoside, Sodium Stearoyl Glutamate, Sucrose Polystearate and Hydrated Polyisobuten. Furthermore, one or more synthetic polymers may be used as an emulsifier. For example, PVP eicosene copolymer, acrylates / C 10-30 alkyl acrylate crosspolymer, acrylates / steareth- 20 methacrylate copolymer, PEG-22 / dodecyl glycol copolymer, PEG-45 / dodecyl glycol copolymer, and mixtures thereof.

[0070] Another particular suitable class of O / W emulsifiers are non-ionic self-emulsifying system derived from olive oil e.g. known as (INCI Name) cetearyl olivate and sorbitan olivate (Chemical Composition: sorbitan ester and cetearyl ester of olive oil fatty acids) sold under the tradename OLIVEM 1000.

[0071] Further suitable are commercially available polymeric emulsifiers such as hydrophobically modified polyacrylic acid such as Acrylates / C 10-30 Alkyl Acrylate Crosspolymers which are commercially available under the tradename Pemulen® TR-1 and TR-2 by Noveon.

[0072] Another class of particularly suitable emulsifiers are polyglycerol esters or diesters of fatty acids also called polyglyceryl ester / diester (i.e. a polymer in which fatty acid(s) is / are bound by esterification with polyglycerine), such as e.g. commercially available at Evonik as Isolan GPS [INCI Name Polyglyceryl-4 Diisostearate / Polyhydroxystearate / Sebacate (i.e. diester of a mixture of isostearic, polyhydroxystearic and sebacic acids with Polyglycerin-4)] or Dehymuls PGPH available at Cognis (INCI Polyglyceryl-2 Dipolyhydroxystearate).

[0073] Particularly advantageous O / W emulsifiers according to the present invention are one or more of Polyglyceryl-3 Methylglucose Distearate, Lauryl Glucoside (and) Polyglyceryl-2 Dipolyhydroxystearate, Glyceryl Sterate Citrate, Sodium Cetearyl Sulfate, Cetearyl Glucoside; Polyglyceryl-6 Stearate (and) Polyglyceryl-6 Behenate, Cetearyl Olivate (and) Sorbitan Olivate, Arachidyl Alcohol (and) Behenyl Alcohol (and) Arachidyl Glucosides, Cetearyl Alcohol (and) Coco-Glucoside, Coco-Glucoside (and) Coconut Alcohol, PEG-100 Stearate (and) Glyceryl Stearate, Sodium Stearoyl Glutamate, Steareth-20, Steareth-21 , Steareth-25, Steareth-2, Ceteareth-25 and Ceteareth-6 (all listed by their INCI names).

[0074] It is particularly preferred in accordance with the invention if the compositions comprises potassium cetyl phosphate as emulsifier.

[0075] The at least one O / W respectively Si / W emulsifier is preferably used in an amount of 0.5 to 10 wt. % such as in particular in the range of 0.5 to 5 wt.-% such as most in particular in the range of 0.5 to 4 wt.-%, based on the total weight of the composition.

[0076] Suitable W / O- or W / Si-emulsifiers according to the present invention are are polyglycerol esters or diesters of fatty acids also called polyglyceryl ester / diester (i.e. a polymer in which fatty acid(s) is / are bound by esterification with polyglycerine), such as e.g. commercially available at Evonik as Isolan GPS [INCI Name Polyglyceryl-4 Diisostearate / Polyhydroxystearate / Sebacate (i.e. diester of a mixture of isostearic, polyhydroxystearic and sebacic acids with Polyglycerin-4)] or Dehymuls PGPH available at Cognis (INCI Polyglyceryl-2 Dipolyhydroxystearate, PEG-30 dipolyhydroxystearat, cetyl dimethicone copolyol, polyglyceryl-3 diisostearate polyglycerol esters of oleic / isostearic acid, polyglyceryl-6 hexaricinolate, polyglyceryl-4-oleate, magnesium stearate, sodium stearate, potassium laurate, potassium ricinoleate, sodium cocoate, sodium tallowate, potassium castorate, sodium oleate, and mixtures thereof. Further suitable W / Si-emulsifiers are Lauryl Polyglyceryl-3 Polydimethylsiloxyethyl Dimethicone and / or PEG-9 Polydimethylsiloxyethyl Dimethicone and / or Cetyl PEG / PPG-10 / 1 Dimethicone and / or PEG-12 Dimethicone Crosspolymer and / or PEG / PPG-18 / 18 Dimethicone. The at least one W / O emulsifier is preferably used in an amount of about 0.001 to 10 wt.-%, more preferably in an amount of 0.2 to 7 wt.-% with respect to the total weigh of the composition.

[0077] The sunscreen compositions according to the present invention furthermore advantageously contain at least one co-surfactant such as e.g. selected from the group of mono- and diglycerides and / or fatty alcohols. The co-surfactant is generally used in an amount selected in the range of 0.1 to 10 wt.-%, such as in particular in the range of 0.5 to 7 wt.-%, such as most in particular in the range of 1 to 5 wt.-%, based on the total weight of the composition. Particular suitable co-surfactants are selected from the list of alkyl alcohols such as cetyl alcohol (Lorol C16, Lanette 16), cetearyl alcohol (Lanette O), stearyl alcohol (Lanette 18), behenyl alcohol (Lanette 22), polyhydroxystearic acid, glyceryl stearate, glyceryl myristate (Estol 3650), hydrogenated coco-glycerides (Lipocire Na10) as well as mixtures thereof.

[0078] Advantageous embodiments of the composition of the present invention also include those wherein the composition next to 2-ethylhexyl 2-hydroxycyclohexanecarboxylate further comprises one or more oils (also referred to herein as solvents for EHT) selected from, phenethyl benzoate, diisopropyl sebacate, di-Ci2-i3 alkyl tartrates, diethylhexyl syringylidene malonates, hydrogenated castor oil dimerates, triheptanoin, C12-13 alkyl lactates, C16-17 alkyl benzoates, propylheptyl caprylates, diethylhexyl 2,6-naphthalates, octyldodecanol, ethylhexyl cocoates. Preferably, the composition according to the present invention comprises as oil(s) in addition to 2-ethylhexyl 2-hydroxycyclohexanecarboxylate further at least one of phenethyl benzoate, C12-13 alkyl lactates, butyloctyl salicylate, as well as mixtures thereof, most preferably at least one of phenethyl benzoate and butyloctyl salicylate.

[0079] In all embodiments of the present invention, the sunscreen compositions of the present invention further comprise one or more alkanediol. Suitable alkanediols encompass

[0080] 1.2-alkanediols and 1 ,3-alkandiols such as in particular 1 ,2-butandiol, butylene glycol,

[0081] 1.2-pentanediol, 1 ,2-hexanediol, 2-methyl-1 ,3-propanediol and 1 ,3-propanediol. Preferred in all embodiments of the present invention is the use of 1 ,3-propanediol, butyleneglycol and / or 1 ,2-butandiol. Most preferred in all embodiments of the present the composition comprises as alkanediol 1 ,3-propandiol, butylene glycol and 1 ,2-butandiol.

[0082] The amount of the alkanediol(s) in the sunscreen compositions according to the present invention is preferably selected in the range from 1 to 10 wt.-%, more preferably from 1.5 to 7.5 wt.-%, most preferably from 2 to 6 wt.-%, such as in the range of 2 to 5 wt.-%, based on the total weight of the composition.

[0083] In a still further advantageous aspect of the invention, the sunscreen compositions of the present invention further comprise a preservative and / or a preservative booster preferably selected from the group consisting of ethanol, phenoxyethanol, 1 ,2-pentanediol,

[0084] 1.2-hexanediol, 1 ,2-octanediol (caprylyl glycol), 1 ,2-decanediol, 2-methyl-1 ,3-propanediol, propylene glycol and / or p-hydroxyacetophenone, more preferably selected from the group consisting of ethanol, phenoxyethanol, ethylhexylglycerin, hexylglycerin, glyceryl caprylate as well as mixtures thereof, most preferably selected from the group of phenoxyethanol, ethylhexyl glycerine and p-hydroxyacetophenone as well as mixtures thereof. When present, the preservative respectively the preservative booster is preferably used in an amount of 0.01 to 2 wt. %, more preferably in an amount of 0.05 to 1 .5 wt.-%, most preferably in an amount of 0.1 to 1.0 wt.-%, based on the total weight of the composition.

[0085] It is advantageous in accordance with the invention if the preparation comprises one or more alkanediols from the group 1 ,2-pentanediol, 1 ,2-hexanediol, 1 ,2-octanediol, 1 ,2-decanediol, 2-methyl-1 ,3-propanediol.

[0086] It is further advantageous in accordance with the invention if the composition of the invention comprises ethanol, p-hydroxyacetophenone, phenoxyethanol and / or ethylhexylglycerin.

[0087] In another advantageous aspect, the sunscreen compositions according to the present invention are free of any parabenes, benzethoniumchlorid, piroctone olamine, lauroylarginat, methylisothiazolinon, chlormethylisothiazolinon, bronopol, benzalkoniumchloride, formaldehyd releasing compounds, salicylic acid, triclosan, DMDM hydantoin, chlorphenesin and IPBC (iodopropinylbutyl carbamate).

[0088] The sunscreen compositions according to the invention may further contain one or more emollients which soothe and soften the skin. As an example, the emollient may be silicone (dimethicone, cyclomethicone), vegetable oils (grape seed, sesame seed, jojoba, etc.), butters (cocoa butter, shea butter), and petrolatum derivatives (petroleum jelly, mineral oil).

[0089] The composition of the invention may advantageously comprise moisturizers. Moisturizers are compounds or mixtures of compounds which give cosmetic compositions the quality, after application to or distribution on the skin surface, of reducing the loss of moisture of the stratum corneum (Experimental determination by e.g transepidermal water loss (TEWL)) and / or of positively influencing the hydration of the stratum corneum and / or keeping an actual hydration state.

[0090] Non-limiting examples of advantageous moisturizers for use in the present invention include glycerol, lactic acid and / or lactates, especially sodium lactate, biosaccharide gum-1 , glycine soya, ethylhexyloxyglycerol, pyrrolidonecarboxylic acid, and urea. Of further advantage, in particular, is the use of polymeric moisturizers from the group of the polysaccharides which are water-soluble and / or swellable in water and / or gellable with the aid of water. Especially advantageous, for example, are hyaluronic acid, chitosan and / or a fucose-rich polysaccharide which is registered in Chemical Abstracts under the registry number 178463-23-5 and is available, for example, under the Fucogel®1000 name from the company SOLABIA S.A. Moisturizers may also be used advantageously as active antiwrinkle ingredients for protection from changes to the skin of the kind occurring in skin aging, for example.

[0091] The sunscreen compositions of the invention may further comprise advantageously, although not mandatorily, fillers which have the effect, for example, of further improving the sensorial and cosmetic properties of the formulations and evoking or intensifying a velvety or silky skin sensation, for example. Advantageous fillers in the sense of the present invention are starch and starch derivatives (such as tapioca starch, distarch phosphate, aluminum or sodium starch octenylsuccinate, and the like, for example), Valvance pigments which have neither primarily UV filter effect nor coloring effect (such as Valvance Touch 210 or 250 for example) and / or Aerosils® and / or talc and / or polyethylene, nylon, and silica dimethyl silylate.

[0092] The water phase of the compositions of the invention may advantageously comprise customary cosmetic auxiliaries, such as, for example, alcohols, particularly those of low C number, preferably ethanol and / or isopropanol, or polyols of low C number, and also ethers thereof, preferably glycerol, electrolytes, self-tanning agents, and also, in particular, one or more thickeners, which may be advantageously selected from the group of silicon dioxide, aluminum silicates, polysaccharides and / or derivatives thereof, e.g., hyaluronic acid, hydroxypropylmethylcellulose as well as particularly advantageously from the group of polyacrylates, preferably a polyacrylate from the group referred to as carbopols, examples being carbopols of types 980, 981 , 1382, 2984, and 5984, in each case individually or in combination. Further thickeners advantageous in accordance with the invention are those having the INCI designation Acrylates / C 10-30 Alkyl Acrylate Crosspolymer (e.g., Pemulen TR 1 , Pemulen TR 2, Carbopol 1328 from NOVEON) and also Aristoflex AVC (INCI: Ammonium Acryloyldimethyltaurate / VP Copolymer) as well as Simugel NS (INCI: Hydroxyethyl Acrylate / Sodium Acryloyldimethyl Taurate Copolymer & Squalane & Polysorbate 60).

[0093] It is preferred in accordance with the invention if the composition comprises one or more thickeners aselected from the group consiting of crosslinked acrylate / C10-C30 alkyl acrylate polymer, hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer and / or vinylpyrrolidone / hexadecane copolymer, preferably hydroxyethyl acrylate / sodium acryloyldimethyl taurate.

[0094] The (total) amount of the one or more thickener in the compositions according to the present invention is preferably selected in the range from 0.1 to 1wt.-%, preferably from 0.1 to 0.75 wt.-%, most preferably from 0.1 to 0.5 wt.-%, such as in the range of 0.2 to 0.5 wt.-%, based on the total weight of the composition.

[0095] Advantageously in accordance with the invention, the composition of the invention may comprise further film formers.

[0096] It is especially advantageous to select said further film formers from the group of the polymers based on polyvinylpyrrolidone (PVP), as well as Capryloyl Glycerin / Sebacic Acid Copolymer, Diisostearoyl Polyglyceryl-3 Dimer Dilinoleate and / or Ethyl Cellulose, Polyglyceryl-3 Stearate / Sebacate, Stearyl / Octyldodecyl Citrate Crosspolymer, Octyldodecyl Citrate Crosspolymer, Bis-Dodecylhexyldecyl Dimer Dilinoleate / Propanediol Copol.ymer, Maleated Soybean Oil Glyceryl / Octyldodecanol Esters, polyester-7, polyamide-8

[0097] Particular preference is given to copolymers of vinylpyrrolidone, as for example the PVP hexadecane copolymer and the PVP eicosene copolymer, which are available under the trade names Antaron V216 and Antaron V220 from GAF Chemicals Corporation.

[0098] Likewise advantageous as further polymeric film formers are for example, sodium polystyrene sulfonate, which is available under the trade name Flexan 130 from National Starch and Chemical Corp., and / or polyisobutene, available from Rewo under the trade name Rewopal PIB1000. Examples of further suitable polymers are polyacrylamides (Seppigel 305), polyvinyl alcohols, PVP, PVP / VA copolymers, polyglycols, acrylate / octylacrylamide copolymer (Dermacryl 79) Likewise advantageous is the use of hydrogenated castor oil dimer dilinoleate (INCI Hydrogenated Castor Oil Dimer Dilinoleate), which can be acquired from Kokyu Alcohol Kogyo under the name Risocast DA-H, or else PPG-3 benzyl ether myristate, which can be acquired under trade name Crodamol STS from Croda Chemicals. It is well understood, that the term sunscreen composition as used herein refers to composition comprising at least EHT, preferably in the presence of further substances which absorb UV-light such as commonly used UVA, UVB or broadband UV-filter substances.

[0099] Thus, preferably, besides ethylhexyl triazone (EHT), one or more further UV filters may be present in the sunscreen composition according to the present invention. These UV filters are in particular (INCI names) methylene bis-benzotriazolyl tetramethylbutylphenol, tris-biphenyl triazine, phenylbenzimidazol sulfonic acid, dimethicodiethyl benzalmalonate, 4-methylbenzylidene camphor, ethylhexyl salicylate, homosalate, diethylhexyl butamido triazone, butyl methoxydibenzoyl methane, ethylhexyl m ethoxyci nn mate, octocrylene, disodium phenyl dibenzimidazole tetrasulfonate and oxybenzone without being limited thereto.

[0100] Preferably, in all embodiments of the present invention, the composition comprises next to ethylhexyl triazone at least one of butylmethoxy dibenzoylmethane and diethylamino hydroxybenzoyl hexyl benzoate (DHHB).

[0101] The amount of the butylmethoxy dibenzoylmethane, commercially available as PARSOL® 1789, in the sunscreen compositions according to the present invention is preferably selected in the range from 1 to 10 wt.-%, more preferably from 1.5 to 7.5 wt.-%, most preferably from 2 to 6 wt.-%, such as in the range of 2 to 5 wt.-%, based on the total weight of the composition.

[0102] The amount of the diethylamino hydroxy benzoyl hexyl benzoate, commercially available as PARSOL® DHHB, in the sunscreen compositions according to the present invention is preferably selected in the range from 1 to 10 wt.-%, more preferably from 1.5 to 7.5 wt.-%, most preferably from 2 to 6 wt.-%, such as in the range of 2 to 5 wt.-%, based on the total weight of the composition.

[0103] In a preferred embodiment, the compositions according to the presentinvention do not comprise bis-ethylhexyloxyphenol methoxyphenyl triazine, even more preferably, the compositions comprise EHT as sole triazine based UV-filter.

[0104] In one embodiment it is preferred that the compositions comprise EHT and butyl methoxydibenzoylmethane, preferably as sole UV-filters. In another embodiment it is preferred that the compositions comprise EHT and diethylamino hydroxybenzoyl hexyl benzoate, preferably as sole UV-filters.

[0105] The compositions of the invention manage with a surprisingly small total amount of solvents for EHT and accordingly with an overall surprisingly small total amount of cosmetic oils (solvents).

[0106] In another aspect, the composition may have an SPF of at least 15, preferably at least 20, most preferably of at least 30.

[0107] The sunscreen compositions according to the invention in general have a pH in the range of 3 to 10, preferably a pH in the range of 4 to 8 and most preferably a pH in the range of 4 to 7. The pH can easily be adjusted as desired with suitable acids such as e.g. citric acid or bases such as NaOH according to standard methods in the art.

[0108] In accordance with the invention is the use of the composition of the invention for protection from skin aging (especially for protection from UV-induced skin aging) and also as a sun protection composition.

[0109] Finally, a subject-matter of the invention is a method for the cosmetic treatment of keratinous substances such as in particular the skin, wherein a composition as defined herein is applied to the said keratinous substances such as in particular to the skin. The method is in particular suitable to protect the skin against the adverse effects of UV-radiation such as in particular sun-burn and / or photoageing.

[0110] Preferences for the sunscreen composition in the uses and methods of this invention are as described herein above.

[0111] The following examples are provided to further illustrate the compositions and effects of the present invention. These examples are illustrative only and are not intended to limit the scope of the invention in any way. Experimental Part

[0112] Solubility method

[0113] - 2 ml of 2-EHCHC are filled into a 20 ml vial with cap.

[0114] - Afterwards 0.02 g (1 %) of the respective substance are weighed and added to the solvent.

[0115] - The vial is stored in a conditioned room at 25°C.

[0116] - The suspension / solution is stirred during seven days at 25°C.

[0117] If the amount of substance put into the solvent is fully soluble, additional substance is added during the seven days until precipitation remains. - After seven days, the sample is centrifuged for 30 minutes at 13000 rpm.

[0118] - The supernatant / clear solution is transferred into a small beaker.

[0119] - The concentration of the substance is determined via HPLC.

[0120] The results are outlined in Table 1 : As can be retrieved from table 1 , 2-ethylhexyl 2-hydroxycyclohexanecarboxylate, i.e. the hydrogenated ethylhexyl salicylate is surprisingly an excellent solubiliser for the solid UV filter ethylhexyl triazone.

[0121] Formulation example

[0122] The sunscreen compositions as outlined in table 2 have been prepared according to standard methods in the art. Table 2: O / W emulsion

[0123] Prepare oil phase (A) by admixing all components thereof and heating up to 75°C while stirring and while solubilising EHT therein.

[0124] Prepare water phase (B) by admixing all components thereof and heat up to 70°C. Add phase (B) to (A) and homogenize at 5000rpm for 2 min using an Ultra Thiurrax. Add phase (C). Cool down while stirring to room temperature. Table 3: Stability data after 3 month storage @ 4°C

[0125] After storage at 4°C after 3 months, the respective samples are assessed visually and by microscope for their appearance. As can be retrieved from the results outlined in table 3, the formulation with 2-ethylhexyl 2-hydroxy cyclohexanecarboxylate according to the present invention leads to stable formulations without any recrystallization of EHT over time.

Claims

CLAIMS1. A sunscreen composition comprising ethylhexyl triazone and 2-ethylhexyl 2-hydroxycyclohexanecarboxylate.

2. The sunscreen composition according to claim 1 , wherein the amount of ethylhexyl triazone is selected in the range from 0.1 to 5 wt.-%, preferably in the range from 0.25 to 5 wt.-%, most preferably in the range from 0.5 to 5 wt.-%, based on the total weight of the composition.

3. The sunscreen composition according to claim 1 or 2, wherein the amount of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate is at least 1 wt.%, preferably at least 2 wt.-%, most preferably at least 2.5 wt.-%, based on the total weight of the composition.

4. The sunscreen compositions according to any one of the preceding claims, wherein the composition is an O / W emulsion comprising an oil phase dispersed in an aqueous phase in the presence of an O / W emulsifier, preferably in the presence of a cetyl phosphate emulsifier, most preferably in the presence of potassium cetyl phosphate.

5. The sunscreen composition according to any one of the proceeding claims, wherein the sunscreen composision comprises an oil phase, which oil phase comprises 2-ethylhexyl 2-hydroxycyclohexanecarboxylate in which the ethylhexyl triazone dissolved.

6. The sunscreen composition according to any one of the preceding claims, wherein the composition further comprises butylmethoxy dibenzoylmethane and / or diethylamino hydroxybenzoyl hexyl benzoate.

7. The sunscreen composition according to any one of the preceding claims, wherein the amount of butyl dibenzoylmethane and / or diethylamino hydroxy benzoyl hexyl benzoate is selected in the range from 1 to 10 wt.-%, preferably from 1.5 to 7.5 wt.-%, most preferably from 2 to 6 wt.-%, such as in the range of 2 to 5 wt.-%, based on the total weight of the composition.

8. The sunscreen composition according to any one of the preceding claims, wherein the composition further comprises one or more oils selected from the group of phenethyl benzoate, diisopropyl sebacates, di-Ci2-i3 alkyl tartrates, hydrogenated castor oil dimerates, triheptanoin, C12-13 alkyl lactates, C16-17 alkyl benzoates, propylheptyl caprylates, diethylhexyl 2,6-naphthalate, octyldodecanol, and ethylhexyl cocoates, preferably of dicaprylyl carbonate, phenethyl benzoate, butyloctyl salicylate, and C12-13 alkyl lactates, most preferably of phenethyl benzoate, butyloctyl salicylate9. The sunscreen composition according to any one of the preceding claims, wherein the composition further comprises one or more a preservative / preservative booster selected from the group consisting of ethanol, phenoxyethanol, 1 ,2-pentanediol, 1 ,2-hexanediol,1 .2-octanediol (caprylyl glycol), 1 ,2 decanediol, 2-methyl-1 ,3-propanediol,1.3-propanediol, and p-hydroxyacetophenone, preferably phenoxyethanol,1 ,3-propanediol, 1 ,2-octandiol and ethylhexylglycerin are used as sole preservative / preservative booster.

10. The sunscreen composition according to any one of the preceding claims, wherein the composition further comprises one or more of crosslinked acrylate / Cw-Cso alkyl acrylate polymer, hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer, preferably and hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer.

11. The sunscreen composition according to any one of the preceding claims, wherein the composition further comprises one or more of behenyl alcohol, cetyl alcohol, cetearyl alcohol, stearyl alcohol and glyceryl stearate, preferably of behenyl alcohol, stearyl alcohol and cetearyl alcohol, most preferably stearyl alcohol.

12. Use of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate for solubilizing ethylhexyl triazone in sunscreen compositions.

13. A method of solubilizing a content of ethylhexyl triazone in a sunscreen composition, said method comprising adding to said sunscreen composition an amount of 2-ethylhexyl 2-hydroxycyclohexanecarboxylate suffcient to solubilize the content of ethylhexyl triazone.

14. A method for the preparation of a sunscreen composition according to anyone of claims 1-11, said method encompassing the step of dissolving ethylhexyl triazon in an oil phase comprising 2-ethylhexyl 2-hydroxycyclohexanecarboxylate.

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