JP2024504488A - Water-in-oil cosmetic sunscreen compositions, uses of water-in-oil cosmetic sunscreen compositions, and methods for producing water-in-oil cosmetic sunscreen compositions - Google Patents

Abstract

The present invention is a new water-in-oil cosmetic sunscreen composition, in particular for skin care, make-up and photoprotection, comprising: (a) at least one pigment; (b) ) at least one UV filter, (c) dimethicone and (d) water, wherein the mass ratio between water and dimethicone is specified. The present invention is also directed to uses of water-in-oil cosmetic sunscreen compositions and methods for making water-in-oil cosmetic sunscreen compositions.

Description

FIELD OF THE INVENTION The present invention relates to new water-in-oil cosmetic sunscreen compositions, in particular for skin care, make-up and photoprotection, comprising: (a) at least one Compositions comprising a pigment, (b) at least one UV filter, (c) dimethicone and (d) water, where the weight ratio between water and dimethicone is specified. The present invention is also directed to uses of water-in-oil cosmetic sunscreen compositions and methods for making water-in-oil cosmetic sunscreen compositions.

BACKGROUND OF THE INVENTION Photoprotection of keratinous materials, including both skin and hair, is used to protect against solar damage, sunburn, photoaging, and skin damage caused by exposure to ultraviolet ("UV") radiation. It is considered to be very important for reducing the possibility of developing cancer. There are typically two types of UVA/UVB cosmetic sunscreen compositions used to achieve photoprotection: inorganic UV filters and organic UV filters.

The degree of UV protection provided by a cosmetic sunscreen composition is related to the amount, type and combination of UV filters contained therein. In particular, cosmetic sunscreen compositions require good protection against solar radiation (a measure of which is the Sun Protection Factor (SPF) value), a desirable balance between UVA and UVB protection, and especially a minimum UVA protection. While providing a modulus, it must still have a satisfactory sensory perception, eg, a smooth but non-greasy feel upon application.

Additionally, it would be desirable to produce cosmetic sunscreen compositions that not only provide photoprotection of keratinous materials, but also provide additional properties. For example, it has a high SPF, has the ability to color the skin and correct imperfections, and preferably has high coverage, which can match different skin tones and thereby provides a makeup effect. ) and a smooth feel on the skin.

The degree of coverage provided by a pigmented cosmetic sunscreen composition when applied to the skin is directly related to the amount of pigment present in the composition. A smooth feel on the skin is obtained by using silicones, especially dimethicone, in the formulation.

However, this combination of properties is particularly important since the presence of large amounts of pigments and UV filters in pigmented cosmetic sunscreen compositions creates stability problems in the formulation, especially on the surface of the composition. This was difficult to achieve due to the migration of the pigment to the surface and the formation of discolored spots on the surface. Additionally, silicones have a tendency to separate from the composition, resulting in undesirable phase separation. These problems are accentuated in the shading of tinted cosmetic sunscreen compositions.

Owing to their ease of application to the skin and their sensory properties, water-in-oil emulsions have found their place in cosmetics in the care field, in particular in cosmetic sunscreen compositions, in anti-aging compositions and in make-up. , a highly sought after galenic form, for example in foundations.

Water-in-oil emulsions, on the one hand, do not always exhibit equally completely satisfactory storage stability at low temperatures (i.e. 4°C), room temperature (i.e. 25°C) and high temperatures (i.e. 45°C and 55°C). On the other hand, it always has completely satisfactory sensory properties, such as softness, non-stick effect, non-greasy effect, smooth feel on the skin, light feel after application or good glide. This does not mean that it will be presented.

US4578266 US5624663 EP669323 US2463264 US5237071 US5166355 GB2303549 DE19726184 EP893119 EP0832642 EP1027883 EP1300137 DE10162844 WO93/04665 DE19855649 EP0967200 DE19746654 DE19755649 EP-A-1008586 EP1133980 EP1133981 WO04/006878 WO05/058269 WO06/032741 US6,225,467 WO2004/085412 WO06/035000 WO06/034982 WO06/034991 WO06/035007 WO2006/034992 WO2006/034985 EP1990372A2 US Patent 5,601,811

"Symmetrical Triazine Derivatives", IP.COM Journal, IP.COM Inc. (West Henrietta, NY, US) (September 20, 2004)

Therefore, it provides stable and all-round satisfactory sensory properties with high SPF and high amount of pigment to provide the result of high color coverage when applied to the skin, and the surface of the composition. A water-in-oil pigmented cosmetic sunscreen composition that does not result in pigment and silicone migration and separation is desired.

The inventors of the present invention have surprisingly found that it has a high SPF, a satisfactory balance between UVA and UVB protection and a large amount of pigment, and has a high coverage effect similar to makeup on the skin. We have accomplished the development of a pigmented water-in-oil cosmetic sunscreen composition that provides excellent sensory attributes and retains good sensory attributes and stability.

SUMMARY OF THE INVENTION The present invention is a new water-in-oil cosmetic sunscreen composition, in particular for skin care, make-up and photoprotection, comprising: (a) at least one Compositions comprising a pigment, (b) at least one UV filter, (c) dimethicone and (d) water, where the weight ratio between water and dimethicone is specified. The present invention is also directed to uses of water-in-oil cosmetic sunscreen compositions and methods for making water-in-oil cosmetic sunscreen compositions.

Other features and advantages of the invention will become apparent from the following more detailed description of the preferred embodiments, which explains the principles of the invention by way of example.

Figures 1, 2 and 3 represent the results of the stability testing of Example 11, Figure 1 relates to the results of the prior art composition of Example 5, and Figures 2 and 3 respectively represent the results of the stability testing of Example 8. and 10 regarding the results of the water-in-oil cosmetic sunscreen composition of the present invention. Figures 1, 2 and 3 represent the results of the stability testing of Example 11, Figure 1 relates to the results of the prior art composition of Example 5, and Figures 2 and 3 respectively represent the results of the stability testing of Example 8. and 10 regarding the results of the water-in-oil cosmetic sunscreen composition of the present invention. Figures 1, 2 and 3 represent the results of the stability testing of Example 11, Figure 1 relates to the results of the prior art composition of Example 5, and Figures 2 and 3 respectively represent the results of the stability testing of Example 11. and 10 regarding the results of the water-in-oil cosmetic sunscreen composition of the present invention.

In embodiments, the water-in-oil cosmetic sunscreen composition of the present invention comprises:
(a) from about 10.0 to about 25.0% by weight, based on the total weight of the composition, of at least one pigment;
(b) from about 15.0 to about 35.0% by weight based on the total weight of the composition of at least one UV filter;
(c) about 8.0 to about 20% by weight dimethicone, based on the total weight of the composition; and
(d) contains water;
The weight ratio between water and dimethicone is within the range of about 1:0.30 to about 1:0.55.

In embodiments, the amount of at least one pigment in the water-in-oil cosmetic sunscreen compositions of the present invention is from about 10.0 to about 20.0% by weight, based on the total weight of the composition, more preferably from about 10.0% to about 20.0% by weight, based on the total weight of the composition. In the range of about 15.0 to about 20.0% by weight based on weight.

In preferred embodiments, the amount of at least one UV filter in the water-in-oil cosmetic sunscreen compositions of the present invention is from about 20.0 to about 30.0% by weight, based on the total weight of the composition, more preferably from about 20.0% to about 30.0% by weight, based on the total weight of the composition. in the range of about 20.0 to about 25.0% by weight based on the total weight of.

Preferably, the amount of dimethicone in the water-in-oil cosmetic sunscreen compositions of the present invention ranges from about 10.0 to about 15.0% by weight, more preferably from about 10.0 to about 13.0% by weight, based on the total weight of the composition. It is within.

In preferred embodiments, the weight ratio between water and dimethicone is within the range of about 1:0.35 to about 1:0.50, more preferably about 1:0.40 to about 1:0.45.

Furthermore, the water-in-oil cosmetic sunscreen composition according to the invention comprises active compounds, fillers, preservatives, silicones other than dimethicone, solvents other than water, surfactants, vitamins and mixtures thereof. Additional cosmetically acceptable ingredients may also be included.

Preferably, water-in-oil cosmetic sunscreen compositions according to the present invention have a sun protection factor (SPF) in the range of about 30 to about 80, more preferably about 40 to about 70, even more preferably about 60. has. In various embodiments, water-in-oil cosmetic sunscreen compositions according to the present invention have a water-in-oil cosmetic sunscreen composition of about 30, about 35, about 40, about 45, about 50, about 55, about 60, about 65, about 70, about 75 or may provide an SPF of about 80. In a preferred embodiment, the UVA protection factor provided by the composition according to the invention is at least 20.

The water-in-oil cosmetic sunscreen compositions of the invention can be used as everyday skin products, in particular products for skin care, make-up and photoprotection.

The present invention also provides said water-in-oil cosmetic sunscreen for producing products for skin care, make-up and photoprotection, with high SPF and high color coverage. Concerning the use of the composition.

Furthermore, the present invention provides a method for producing the water-in-oil cosmetic sunscreen composition, comprising:
i) adding to the main container water, a UV filter, dimethicone and optionally additional cosmetically acceptable ingredients at a temperature within the range of about 20°C to about 60°C;
ii) adding at least one pigment to a main container at a temperature within the range of about 25 to about 30°C.

In a preferred embodiment of the method according to the invention, step (i) is carried out in two different sub-steps,
i.1) the aqueous phase components are first mixed together in a main vessel so that an aqueous phase is formed;
i.2) The oily components are subsequently added individually to the aqueous phase, so that an emulsion is formed.

Terminology For the purposes of the present invention, the expression "water-in-oil composition" and similar expressions refer to water-in-oil (W/O) emulsions, also referred to as inverted emulsions.

As used herein, the term "dimethicone" means at least one silicone component having the INCI name dimethicone.

As used herein, the expression "at least" means one or more and thus includes individual components as well as mixtures/combinations.

As used herein, all ranges provided are meant to include every specific range within the given range and any combination of subranges between the given ranges. Therefore, the range 1 to 5 includes specifically 1, 2, 3, 4 and 5, as well as subranges such as 2 to 5, 3 to 5, 2 to 3, 2 to 4, 1 to 4, etc. including. All ranges and values disclosed herein are inclusive and combinable. For example, any value or point described herein that is included in the range described herein can serve as a minimum value or maximum value, etc. for deriving a subrange.

The terms "comprising", "having" and "including" are used in an open, non-limiting sense.

The compositions and methods of the present disclosure incorporate the essential elements and limitations of the disclosure described herein, as well as any additional or optional ingredients, components, or limitations described herein or otherwise useful. It may contain, consist of, or consist essentially of these.

The terms "a," "an," and "the" are understood to include the plural and the singular. The term "a mixture thereof" therefore also relates to "mixtures thereof". Throughout the disclosure, the term "a mixture thereof" is used following a list of elements (letters A to F represent the elements), as illustrated in the following example: "A, "One or more elements selected from the group consisting of B, C, D, E, F and mixtures thereof." The term "mixtures thereof" does not require that the mixture contain all of A, B, C, D, E and F (all of A, B, C, D, E and F may be included). Rather, it indicates that a mixture of any two or more of A, B, C, D, E and F may be included. In other words, "one or more elements selected from the group consisting of A, B, C, D, E, F, and mixtures of any two or more of A, B, C, D, E, and F. ” is equivalent to the phrase “.

All percentages, parts, and ratios herein are based on the total weight of the compositions of the present disclosure, unless otherwise indicated.

Except where indicated in the examples or otherwise, all numbers expressing amounts of components and/or reaction conditions are to be understood as modified in all cases by the term "about". Yes, and can include ±10%, ±8%, ±6%, ±5%, ±4%, ±3%, ±2%, ±1% or ±0.5%.

Similarly, the term "a salt thereof" also relates to "salts thereof". Therefore, when the disclosure refers to "elements selected from the group consisting of A, B, C, D, E, F, salts thereof, and mixtures thereof", one or more of A, B, C, D and F may contain one or more of the following: a salt of A, a salt of B, a salt of C, a salt of D, a salt of E and a salt of F; or A, B, C, This indicates that a mixture of any two of D, E, F, salts of A, salts of B, salts of C, salts of D, salts of E, and salts of F may be included.

Salts referred to throughout this disclosure may include salts with counterions, such as alkali metal, alkaline earth metal or ammonium counterions. However, this list of counterions is non-limiting.

All components and elements affirmatively mentioned in this disclosure may be negatively excluded from the claims. In other words, compositions of the exemplary disclosure may be free or substantially free of all components and elements positively recited throughout the exemplary disclosure.

All publications and patent applications cited in this specification are herein incorporated by reference, as if each individual publication and patent application was specifically and individually indicated to be incorporated by reference. Incorporated herein for all purposes. In the event of any inconsistency between this disclosure and any publication or patent application incorporated herein by reference, this disclosure will control.

Pigment The water-in-oil cosmetic sunscreen composition of the present invention comprises at least one pigment.

The term "pigment" may mean white or colored mineral or organic particles that are insoluble in aqueous media and are intended to color and/or opacify the resulting composition and/or deposit. intended. These pigments may be white or colored and may be mineral and/or organic.

According to a particular embodiment, the pigment used according to the invention is selected from mineral pigments.

The term "mineral pigment" is intended to mean any pigment that meets the definition in the chapter on inorganic pigments of Ullmann's Encyclopedia. Among the mineral pigments useful in this invention are zirconium oxide or cerium oxide, and zinc oxide, iron oxide (black, yellow or red) or chromium oxide, manganese violet, ultramarine blue, chromium hydrate and ferric blue, dioxide. Mention may also be made of titanium and metal powders, such as aluminum powder and copper powder. The following mineral pigments can also be used: Ta ₂ O ₅ , Ti ₃ O ₅ , Ti ₂ O ₃ , TiO, ZrO ₂ as a mixture with TiO ₂ , ZrO ₂ , Nb ₂ O ₅ , CeO ₂ , ZnS. .

In the context of the present invention, mineral pigments are in particular iron oxides and/or titanium dioxide. Examples which may be mentioned in particular include titanium dioxide and iron oxide coated with aluminum stearoylglutamate, sold for example by Miyoshi Kasei Co., Ltd. under the reference name NAI. Other preferred examples include titanium dioxide and iron oxide coated with disodium stearoylglutamate and aluminum hydroxide.

For the purposes of the present invention, "coating" of a pigment according to the invention generally refers to the entire or partial surface of the pigment, by means of which a surface agent is absorbed, adsorbed or grafted onto said pigment. Represents processing.

The coating may represent about 0.1% to about 20.0% by weight, especially about 0.5 to about 5.0% by weight, based on the total weight of the coated pigment.

Coatings can be made by simply mixing these particles and a liquid surface agent, with optional heating, by stirring, e.g., before incorporating the particles into other ingredients of a make-up or care composition. This can be done by adsorbing the surface agent onto the surface.

Coating may be performed, for example, by chemically reacting the surface agent with the surface of the solid pigment particles to form a covalent bond between the surface agent and the particles. This method is described in particular in patent US4578266.

Chemical surface treatment involves diluting the surface agent in a volatile solvent, dispersing the pigment in this mixture, and then slowly evaporating the volatile solvent so that the surface agent adheres to the surface of the pigment. It can be composed of

The amount of at least one pigment in the water-in-oil cosmetic sunscreen composition according to the present invention is from about 10.0 to about 25.0% by weight, preferably from about 10.0 to about 20.0% by weight, based on the total weight of the composition; More preferably, it is within the range of about 15.0 to about 20.0% by mass.

UV Filter The UV filter of the water-in-oil cosmetic sunscreen composition of the present invention is selected from the group consisting of oil-soluble organic sunscreen components and water-soluble organic sunscreen components. Non-limiting suitable organic UV filters of the invention are further described below.

Oil-Soluble Organic Sunscreen Components An "oil-soluble organic sunscreen component" is one that is sufficiently soluble or miscible in the oil phase in molecular form or in colloidal form (e.g., micellar form) in the oil phase. means any organic compound for shielding UV radiation that can be dissolved in

Non-limiting examples of oil-soluble organic sunscreen components useful in the present invention include, for example, cinnamic acid derivatives; anthracenes; salicylic acid derivatives; dibenzoylmethane derivatives; camphor derivatives; benzophenone derivatives; diphenyl acrylate derivatives; triazine derivatives benzotriazole derivatives; benzalmalonate derivatives, especially those cited in patent US5624663; benzimidazole derivatives; imidazolines; bis-benzoazolyl derivatives as described in patents EP669323 and US2463264; p - Aminobenzoic acid (PABA) derivatives; Sasol derivative ; shielding polymers and shielding silicones, such as those described inter alia in patent application WO 93/04665; dimers derived from alkylstyrenes, such as those described in patent application DE 19855649; 4,4-diarylbutadiene, For example, those described in patent applications EP0967200, DE19746654, DE19755649, EP-A-1008586, EP1133980 and EP1133981; and mixtures thereof, the entire contents of which are incorporated by reference in their entirety.

As examples of other suitable oil-soluble organic sunscreen components, mention may be made of those indicated by the INCI names below.

Cinnamic acid derivatives:
Examples of suitable cinnamic acid derivatives include, but are not limited to, ethylhexyl methoxycinnamate, isopropyl methoxycinnamate, isoamyl methoxycinnamate, DEA methoxycinnamate, diisopropyl methylcinnamate, dimethoxycinnamate. Examples include glyceryl ethylhexanoate.

Dibenzoylmethane derivative:
Examples of suitable dibenzoylmethane derivatives include, but are not limited to, butylmethoxydibenzoylmethane and isopropyldibenzoylmethane.

Salicylic acid derivatives:
Examples of suitable salicylic acid derivatives include, but are not limited to, homosalate, ethylhexyl salicylate, dipropylene glycol salicylate, and TEA salicylate.

Beta,beta-diphenylacrylate derivatives:
Examples of suitable beta,beta-diphenylacrylate derivatives include, but are not limited to, octocrylene and ethocrylene.

Benzophenone derivatives:
Examples of suitable benzophenone derivatives include, but are not limited to, benzophenone-1, benzophenone-2, benzophenone-3 or oxybenzone, benzophenone-4, benzophenone-5, benzophenone-6, benzophenone-8, benzophenone-9, Mention may be made of benzophenone-12, n-hexyl 2-(4-diethylamino-2-hydroxybenzoyl)benzoate+, or as a mixture with octyl methoxycinnamate.

Benzylidene camphor derivatives:
Examples of suitable benzylidene camphor derivatives include, but are not limited to, prepared 3-benzylidene camphor, 4-methylbenzylidene camphor, prepared polyacrylamidomethylbenzylidene camphor.

Phenylbenzotriazole derivatives:
Examples of suitable phenylbenzotriazole derivatives include, but are not limited to, drometrizole trisiloxane, methylenebis-benzotriazolyltetramethylbutyl-phenol or micronized form as an aqueous dispersion.

Triazine derivatives:
Examples of suitable triazine derivatives include, but are not limited to, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl triazone, diethylhexyl butamide triazone, 2,4,6-tris(dineopentyl 4'-aminoben Zalmalonate)-s-triazine, 2,4,6-tris(diisobutyl 4'-aminobenzalmalonate)s-triazine, 2,4-bis(dineopentyl 4'-aminobenzalmalonate)-6-( n-Butyl 4'-aminobenzoate)-s-triazine, patent US6,225,467, patent application WO2004/085412 (see compounds 6 and 9), or the document "Symmetrical Triazine Derivatives", IP.COM Journal, IP. Symmetrical triazine screening agents, particularly 2,4,6-tris(biphenyl)-1,3,5-triazine ( In particular, 2,4,6-tris(biphenyl-4-yl)-1,3, 5-triazine and 2,4,6-tris(terphenyl)-1,3,5-triazine).

Anthranilic acid derivatives:
Examples of suitable anthranilic acid derivatives include, but are not limited to, menthyl anthranilate.

Imidazoline derivatives:
Examples of suitable imidazoline derivatives include, but are not limited to, ethylhexyldimethoxybenzylidene dioxoimidazoline propionate.

Benzalmalonate derivatives:
Examples of suitable benzalmalonate derivatives include, but are not limited to, polyorganosiloxanes containing benzalmalonate functionality, such as polysilicone-15.

4,4-diarylbutadiene derivatives:
Examples of suitable 4,4-diarylbutadiene derivatives include, but are not limited to, 1-dicarboxy(2,2'-dimethylpropyl)-4,4-diphenyl-butadiene.

Benzoxazole derivatives:
Examples of suitable benzoxazole derivatives include, but are not limited to, 2,4-bis[5-(1-dimethylpropyl)benzoxazol-2-yl-(4-phenyl)imino]-6-(2 -ethylhexyl)imino-1,3,5-triazine and mixtures thereof.

Water-soluble organic sunscreen component "Water-soluble organic sunscreen component" means a water-soluble organic sunscreen component that is sufficiently soluble or miscible in molecular form in a liquid aqueous phase, or in colloidal form (e.g., means any organic compound for shielding UV radiation that can be dissolved (in micellar form).

Non-limiting examples of water-soluble organic sunscreen ingredients useful in the present invention include, for example, terephthalylidene dicamphorsulfonic acid (Ecamsul), phenylbenzimidazole sulfonic acid (Enthryzol), benzophenone-4, aminobenzoic acid (PABA), 4-bis(polyethoxy)-para-aminobenzoic acid polyethoxyethyl ester (PEG-25 PABA), camphorbenzalkonium methosulfate, methylenebis-benzotriazolyltetramethylbutylphenol (bisoctrisol), phenyl Dibenzimidazole disodium tetrasulfonate (bisdisorizole disodium) and trisbiphenyltriazine; derivatives thereof and corresponding salts; naphthalene bisimide derivatives, such as those described in European patent application EP1990372A2, the entire contents of which are hereby incorporated by reference. and cinnamidoamine cationic quaternary salts and derivatives, such as those described in US Pat. No. 5,601,811, the entire contents of which are incorporated herein by reference, and mixtures thereof.

Salts of the compounds which can be used according to the invention are in particular alkali metal salts, such as sodium or potassium salts; alkaline earth metal salts, such as calcium, magnesium or strontium salts; metal salts, such as zinc, aluminum , manganese or copper salts; salts of ammonium of formula NH4+; quaternary ammonium salts; salts of organic amines, such as methylamine, dimethylamine, trimethylamine, triethylamine, ethylamine, 2-hydroxyethylamine, bis(2-hydroxyethyl ) salts of amines or tris(2-hydroxyethyl)amines; salts of lysine or arginine; Salts selected from sodium, potassium, magnesium, strontium, copper, manganese or zinc salts are preferably used. Sodium salts are preferably used.

In a preferred embodiment, the at least one UV filter of the water-in-oil cosmetic sunscreen composition of the present invention comprises octocrylene, ethylhexyl salicylate, butylmethoxydibenzoylmethane, bis-ethylhexyloxyphenolmethoxyphenyltriazine, homosalate, and the like. selected from the group consisting of a mixture of In a more preferred embodiment, the at least one UV filter comprises ethylhexyl salicylate at a concentration of about 5.0% by weight or less.

The amount of at least one UV filter in the water-in-oil cosmetic sunscreen compositions of the present invention is preferably from about 15.0 to about 35.0% by weight, more preferably from about 20.0% to about 35.0% by weight, based on the total weight of the composition. About 30.0% by weight, even more preferably in the range of about 20.0 to about 25.0% by weight.

Water The water-in-oil cosmetic sunscreen composition of the present invention contains water. The water used can be sterile demineralized water and/or demineralized water, and/or floral waters, such as rose water, cornflower water, chamomile water, or lime water, and/or natural thermal or mineral waters, such as , the water of Vittel, the water of the Vichy Basin, the water of Uriage, the water of La Roche-Posay, the water of La Brebourg, the water of Enghien-les-Bains, the water of Saint-Gerve-Les-Bains, the water of Néry-les-Bains, the water of Alvar-les-Bains, the water of Dignes, the water of Mézières. The water may be Nayrac-les-Bains water, Lons-Rousaugnier water, Aubonne water, Rochefort water, Saint-Christo water, Refumade water, Tercil-les-Bains water, or Avène water, or the like. The water may also include reconstituted spa water, ie water containing trace elements such as zinc, copper, magnesium, etc., reconstituting the characteristics of the spa water.

In preferred embodiments, the water-in-oil cosmetic sunscreen compositions of the present invention have a water-in-oil cosmetic sunscreen composition of about 1:0.30 to about 1:0.55, more preferably about 1:0.35 to about 1:0.50, even more preferably about 1:0. having a weight ratio between water and dimethicone in the range of 0.40 to about 1:0.45.

Additional Ingredients In addition to the essential components previously described, the water-in-oil cosmetic sunscreen compositions of the present invention contain, inter alia, active compounds, fillers, preservatives, silicones other than dimethicone, solvents other than water, It may further comprise any conventional cosmetically acceptable ingredients, which may be selected from surfactants, vitamins and mixtures thereof.

A person skilled in the art will be able to carefully determine the optional additional ingredients and/or their amounts so that the advantageous properties of the compositions according to the invention are not or substantially not adversely affected by the envisaged addition. You will have to choose.

Suitable polymers include, but are not limited to, acrylates/C _10-30 alkyl acrylate crosspolymers, styrene/acrylates copolymers, and mixtures thereof.

The composition may also include at least one silicone component other than dimethicone, which may be caprylyl methicone, vinyl dimethicone/methicone silsesquioxane crosspolymer, among others.

A non-limiting example of a preservative that can be used in accordance with the present invention includes phenoxyethanol.

Additional suitable solvents include, but are not limited to, C _12-15 alkyl benzoates, pentylene glycol, propylene glycol, caprylyl glycol, propanediol, ethanol, and mixtures thereof.

Suitable surfactants include polyglycerols and (i) polyhydroxystearic acids, including 2 to 5 units of 12-hydroxystearic acid, (ii) linear or Polyhydroxystearin obtained by esterification of a mixture of branched aliphatic dicarboxylic acids and (iii) saturated or unsaturated, linear or branched fatty acids containing from 16 to 20 carbon atoms. It may be selected from fatty acid esters of polyols, selected from esters of acids and dicarboxylic acids. In particular, the fatty acid ester of the polyol is diisostearic acid/polyhydroxystearic acid/polyglyceryl-4 sebacate. Suitable surfactants are also selected from polyethylene glycol esters, especially PEG-30 dipolyhydroxystearate.

In various embodiments, the solvent other than water is about 0.5 to about 30.0% by weight, or about 5.0 to about 25.0% by weight, or about 5.0 to about 20.0% by weight, based on the total weight of the disclosed combinations and/or compositions. Present in a concentration of % by mass.

Suitable additional active compounds include, but are not limited to, disodium EDTA, triethanolamine, magnesium sulfate, caffeine, and mixtures thereof.

The composition may also include at least one filler, such as silica, polylactic acid, disteardimonium hectorite, mica, and kaolin. Preferred embodiments of mica include synthetic mica having the INCI name synthetic fluorophlogopite.

Suitable vitamins according to the invention include niacinamide and tocopherols.

The additional components represent about 10.0 to about 60.0%, such as about 15.0 to about 55.0%, such as about 15.0 to about 50.0%, or such as about 15.0 to about 30.0% by weight, based on the total weight of the composition. I can do it.

By way of non-limiting illustration, the invention will now be described with reference to the following embodiments and examples.

Embodiments Examples of suitable water-in-oil cosmetic sunscreen compositions according to the present invention include:
- from 9.0 to 16.0% by weight, based on the total weight of the composition, of iron oxide (and) disodium stearoylglutamate (and) aluminum hydroxide;
- 1.0 to 3.0% by weight of synthetic fluorophlogopite, based on the total weight of the composition;
- 20.0 to 25.0% by weight, based on the total weight of the composition, of octocrylene, ethylhexyl salicylate, butylmethoxydibenzoylmethane, bis-ethylhexyloxyphenolmethoxyphenyltriazine and homosalate;
- 10.0 to 15.0% by weight of dimethicone, based on the total weight of the composition;
- water (the mass ratio between water and dimethicone is in the range 1:0.35 to 1:0.50),
- 0.1-2.0% by weight of propylene glycol, based on the total weight of the composition;
- 1.0-3.0% magnesium sulfate and caffeine,
- 0.1-2.0% disteardimonium hectorite,
- 0.1-1.5% phenoxyethanol,
- 1.0 to 5.0% by weight of vinyl dimethicone/methicone silsesquioxane crosspolymer, based on the total weight of the composition;
- 0.1 to 3.0% by weight of diisostearic acid/polyhydroxystearic acid/polyglyceryl-4 sebacate and PEG-30 dipolyhydroxystearate, based on the total weight of the composition;
- 1.0 to 5.0% by weight of niacinamide and tocopherol, based on the total weight of the composition, and
- Contains 5.0-15.0% propanediol and ethanol.

Another suitable water-in-oil cosmetic sunscreen composition according to the invention is:
- from 1.0 to 10.0% by weight, based on the total weight of the composition, of iron oxide (and) disodium stearoylglutamate (and) aluminum hydroxide;
- 8.0 to 15.0% by weight of titanium dioxide (and) disodium stearoylglutamate (and) aluminum hydroxide, based on the total weight of the composition;
- 1.0 to 3.0% by weight of synthetic fluorophlogopite, based on the total weight of the composition;
- 20.0 to 25.0% by weight, based on the total weight of the composition, of octocrylene, ethylhexyl salicylate, butylmethoxydibenzoylmethane, bis-ethylhexyloxyphenolmethoxyphenyltriazine and homosalate;
- 10.0 to 15.0% by weight of dimethicone, based on the total weight of the composition;
- water (the mass ratio between water and dimethicone is in the range 1:0.35 to 1:0.50),
- 0.1-2.0% by weight of propylene glycol, based on the total weight of the composition;
- 1.0-3.0% magnesium sulfate and caffeine,
- 0.1-2.0% disteardimonium hectorite,
- 0.1-1.5% phenoxyethanol,
- 1.0 to 5.0% by weight of vinyl dimethicone/methicone silsesquioxane crosspolymer, based on the total weight of the composition;
- 0.1 to 3.0% by weight of diisostearic acid/polyhydroxystearic acid/polyglyceryl-4 sebacate and PEG-30 dipolyhydroxystearate, based on the total weight of the composition;
- 1.0 to 5.0% by weight of niacinamide and tocopherol, based on the total weight of the composition, and
- Contains 5.0-15.0% by weight of propanediol and ethanol, based on the total weight of the composition.

(Examples 1 to 10)
As follows, water-in-oil cosmetic sunscreen compositions according to the prior art are represented by Examples 1-5, and preferred water-in-oil cosmetic sunscreen compositions according to the invention are represented by Examples 6-10.

(Example 11)
Stability Testing To evaluate the stability of the water-in-oil cosmetic sunscreen compositions of Examples 8 and 10 of the present invention, tests were conducted and compared with the stability of the prior art composition of Example 5. .

After manufacture, the compositions were allowed to remain stable for 16 to 72 hours in both containing glasses, and then they were
- 55℃ for 1 week,
- 45℃ and 1 month
- 45℃ for 2 months
It was attached to.

After these periods, the compositions were subsequently evaluated microscopically and visually to determine stability and physicochemical behavior.

The results are presented in Figures 1, 2 and 3, where Figure 1 relates to the results of the prior art composition of Example 5 and Figures 2 and 3 relate to the results of the inventive composition according to Examples 8 and 10, respectively. Regarding the results of

As mentioned above, the compositions according to Examples 8 and 10 showed neither formulation instability nor migration of surface pigment or dimethicone, whereas the composition according to Example 5 was clearly unstable. There was a behavior of movement of red iron oxide and dimethicone, and silicone was exposed.

Claims (11)

A water-in-oil cosmetic sunscreen composition, in particular for skin care, make-up and photoprotection, comprising:
(a) 10.0 to 25.0% by weight of at least one pigment, based on the total weight of the composition;
(b) 15.0 to 35.0% by weight based on the total weight of the composition of at least one UV filter;
(c) 8.0 to 20.0% by weight of dimethicone, based on the total weight of the composition; and
(d) contains water;
The mass ratio between water and dimethicone is within the range of 1:0.30 to 1:0.55;
Composition. Composition according to claim 1, wherein the at least one pigment is selected from mineral pigments, preferably from titanium dioxide, iron oxide and mixtures thereof. 2. The composition of claim 1, wherein the at least one pigment is in the range of 10.0 to 20.0% by weight based on the total weight of the composition. The composition of claim 1, wherein the at least one UV filter is selected from the group consisting of octocrylene, ethylhexyl salicylate, butylmethoxydibenzoylmethane, bis-ethylhexyloxyphenolmethoxyphenyltriazine, homosalate, and mixtures thereof. . 2. The composition of claim 1, wherein the amount of the at least one UV filter is within the range of 20.0-30.0% by weight based on the total weight of the composition. 2. The composition of claim 1, wherein the amount of dimethicone is in the range of 10.0 to 15.0% by weight based on the total weight of the composition. Composition according to claim 1, wherein the mass ratio between water and dimethicone is in the range 1:0.35 to 1:0.50. The composition further comprises additional cosmetically acceptable ingredients selected from active compounds, fillers, preservatives, silicones other than dimethicone, solvents other than water, surfactants, vitamins and mixtures thereof. , the composition of claim 1. 2. The composition of claim 1, wherein the composition exhibits a sun protection factor (SPF) within the range of 30-80. Use of a water-in-oil cosmetic sunscreen composition for producing products for skin care, make-up and photoprotection, the composition comprising:
(a) 10.0 to 25.0% by weight of at least one pigment, based on the total weight of the composition;
(b) 15.0 to 35.0% by weight based on the total weight of the composition of at least one UV filter;
(c) 8.0 to 20.0% by weight of dimethicone, based on the total weight of the composition; and
(d) contains water;
The mass ratio between water and dimethicone is within the range of 1:0.30 to 1:0.55;
use. 1. A method for producing a water-in-oil cosmetic sunscreen composition, the composition comprising:
(a) 10.0 to 25.0% by weight of at least one pigment, based on the total weight of the composition;
(b) 15.0 to 35.0% by weight of at least one UV filter based on the total weight of the composition;
(c) 8.0 to 20.0% by weight of dimethicone, based on the total weight of the composition; and
(d) contains water;
the mass ratio between water and dimethicone is within the range of 1:0.30 to 1:0.55;
The method includes:
i) adding to the main container said water, UV filter, dimethicone and optionally additional cosmetically acceptable ingredients at a temperature within the range of 20-60°C;
ii) adding said at least one pigment to said main container at a temperature within the range of 25-30°C.