COSMETIC METHOD FOR APPLYING A SUNSCREEN COMPOSITION

Abstract

COSMETIC METHOD FOR APPLYING SUNSCREEN COMPOSITION The present invention relates to a cosmetic method for applying a sunscreen composition to a face, comprising the following steps: (1) supplying a sunscreen composition in an amount of 0.3 g or more; (2) placing or dispensing the sunscreen composition onto at least three points on the face with at least one finger, the three or more points including any one of the center of the forehead, the cheeks, and the center of the chin; (3) spreading the sunscreen composition from the center to the periphery of the face with at least three fingers, applying a pressure of 1.5 N or less; and (5) patting the face with at least three fingers to obtain a film of the sunscreen composition on the face. The cosmetic method according to the present invention can confer effective protection against UV radiation.Figure for the abridged version: none.

Description

Title of the invention: COSMETIC METHOD FOR APPLYING A SUNSCREEN COMPOSITION technical field

[0001] The present invention relates to a non-therapeutic cosmetic method or process for applying a sunscreen composition. PRIOR TECHNOLOGY

[0002] Various sunscreen products are used to protect the skin, especially facial skin, against UV rays which can, in particular, be emitted by the sun.

[0003] However, consumers of sunscreen products may not be able to use them effectively if they are not applied correctly. The actual protective capacity of sunscreen products can depend on how the sunscreen products are used. DISCLOSURE OF THE INVENTION

[0004] An objective of the present invention is to propose a cosmetic method for applying a sunscreen composition that provides effective protection against UV rays.

[0005] The above objective of the present invention can be achieved by a cosmetic method of applying a sunscreen composition to a face, comprising the following steps: 1. the supply of a sunscreen composition in a quantity of 0.3 g or more; 2. the placement of the sunscreen composition on at least three points on the face with at least one finger, in which the at least three points include any one of the center of the forehead, the cheeks and the center of the chin; 3. Spreading the sunscreen composition from the center to the periphery of the face with at least three fingers, applying a pressure of 1.5 N or less; and 4. Patting the face with at least three fingers to obtain a film of the sunscreen composition on the face.

[0006] The quantity of the sunscreen composition supplied in step (1) may be greater than 0.3 g, preferably 0.4 g or more, and more preferably 0.5 g or more, and less than 0.6 g.

[0007] In step (1), the sunscreen composition can be placed on the back or palm of a hand, in the form of a line to form a spiral shape, to provide 0.3 g or more of the sunscreen composition.

[0008] In step (1), the sunscreen composition can be placed on the back or palm of a hand, in the form of a line to form a spiral-shaped wrap two or three times, to provide 0.3 g or more of the sunscreen composition.

[0009] In step (2), the sunscreen composition can be placed on at least four points, preferably five points on the face, in which the at least four points include any one of the center of the forehead, the cheeks, the center of the nose and the center of the chin.

[0010] In step (3), pressure can be applied in step (3) with at least three bent fingers.

[0011] In step (3), the sunscreen composition can also be applied with at least one applicator.

[0012] Preferably, after step (3), the cosmetic process according to the present invention may further include a step of spreading the sunscreen composition on the nose and eyelids of the face, in which at least one finger is used. Preferably, to spread the sunscreen composition on the nose and eyelids of the face, a pressure of 1.5 N or less is applied. The sunscreen composition may also be applied to the nose and eyelids of the face with at least one applicator.

[0013] Step (4) can be carried out with at least one device.

[0014] The cosmetic process according to the present invention may further include a step (5) of pressing the face with the hands. In step (5), at least the cheeks of the face may be pressed simultaneously.

[0015] It is preferable that the sunscreen composition used for the cosmetic process according to the present invention be in the form of a cream.

[0016] The sunscreen composition used for the cosmetic process according to the present invention may include (a) at least one UV filter.

[0017] The sunscreen composition used for the cosmetic process according to the present invention may further comprise:

[0018] (b) at least one fat; and

[0019] (c) at least one solvent.

[0020] The sunscreen composition used for the cosmetic process according to the present invention may further comprise (d) at least one surfactant and / or (e) at least one thickener. Brief description of the drawings

[0021] [Fig-1] Fig. 1 presents an example of a spiral shape that can be formed during step (1) in the cosmetic process according to the present invention.

[0022] [Fig.2] Fig.2 presents an example of gestures in steps (2) to (5) in the cosmetic process according to the present invention. Best embodiment of the invention

[0023] After extensive research, the inventors discovered a new cosmetic process for applying a sunscreen composition that can provide effective protection against UV rays.

[0024] Thus, one aspect of the present invention is a cosmetic method for applying a sunscreen composition to a face, comprising the following steps: 1. the supply of a sunscreen composition in a quantity of 0.3 g or more; 2. the placement of the sunscreen composition on at least four points on the face with at least one finger, in which the at least four points include any one of the center of the forehead, the cheeks and the center of the chin; 3. Spreading the sunscreen composition from the center to the periphery of the face with at least three fingers, applying a pressure of 1.5 N or less; and 4. Patting the face with at least three fingers to obtain a film of the sunscreen composition on the face.

[0025] The cosmetic process according to the present invention can offer effective protection against UV rays, by forming a homogeneous or uniform film of a sunscreen composition of sufficient thickness on a face.

[0026] The cosmetic process according to the present invention can also reduce the unprotected skin surface on the face.

[0027] Conventional sunscreen products do not offer clear recommendations and techniques for obtaining a homogeneous or uniform film of a sunscreen composition of sufficient thickness on a face.

[0028] On the other hand, the present invention can give clear recommendations on, preferably, how to obtain a sufficient quantity of a sunscreen composition, and a clear gesture to improve the homogeneity or Funiformity of a film of a sunscreen composition on the face.

[0029] The cosmetic process according to the present invention and similar ones will be explained in more detail below. [Cosmetic process]

[0030] The cosmetic method, or cosmetic process, according to the present invention for applying a sunscreen composition to a face, comprises the following steps: 1. the supply of a sunscreen composition in a quantity of 0.3 g or more; 2. the placement of the sunscreen composition on at least three points on the face with at least one finger, in which the at least three points include any one of the center of the forehead, the cheeks and the center of the chin; 3. Spreading the sunscreen composition from the center to the periphery of the face with at least three fingers, applying a pressure of 1.5 N or less; and 4. Patting the face with at least three fingers to obtain a film of the sunscreen composition on the face.

[0031] The cosmetic process according to the present invention can be characterized by a combination of an appropriate quantity of a sunscreen composition and an appropriate application protocol defined by a specific pressure gesture and gesture pattern.

[0032] Each step included in the cosmetic process according to the present invention will be described below. (Step 1)

[0033] Step (1) of the cosmetic process according to the present invention provides a sunscreen composition in an amount of 0.3 g or more. It may be preferable for the amount of a sunscreen composition to be 0.4 g or more, and more preferably 0.5 g or more. An amount of 0.3 g or more of a sunscreen composition can produce a cosmetic film of the sunscreen composition of sufficient thickness.

[0034] There is no upper limit to the amount of sunscreen composition to be supplied in step (1) of the cosmetic process according to the present invention. However, it may be preferable for the amount of sunscreen composition to be 0.6 g or less.

[0035] Preferably, the quantity of the sunscreen composition supplied in step (1) is greater than 0.3 g, more preferably 0.4 g or more, and even more preferably 0.5 g or more, and less than 0.6 g.

[0036] The sunscreen composition can be placed on the back or palm of a hand.

[0037] In step (1), a sunscreen composition may be placed on the back or palm of a hand, in the form of a line to form a spiral shape, in order to provide 0.3 g or more of the sunscreen composition.

[0038] For example, a sunscreen composition can be introduced into a container, such as a tube, having a nozzle, and the sunscreen composition can be dispensed from the nozzle by squeezing and moving the container in a spiral, starting from the center and moving to the periphery of the spiral, in the form of a line with little or no space between the lines. The width of the line must be constant by regulating, for example, the pressure applied to the container, the speed of movement of the container, etc.

[0039] In the above embodiment, a sunscreen composition can be placed on the back or palm of a hand, in the form of a line to create a spiral shape two or three times, in order to provide 0.3 g or more of the sunscreen composition. The diameter of the spiral shape can be from 1 cm to 2 cm, for example 1.5 cm.

[0040] Fig. 1 shows an example of a spiral shape that can be formed during step (1).

[0041] In the spiral shape illustrated in [Fig. 1], a line of a sunscreen composition begins at the center of the spiral shape and is wound three times. In the spiral shape illustrated in [Fig. 1], there is a small space between the lines to show the lines separately. However, it is preferable that there be no space between the lines. (Step 2)

[0042] Step (2) of the cosmetic process according to the present invention places the sunscreen composition provided by step (1) on at least three points on the face of a user of the sunscreen composition with at least one finger, wherein the at least three points include any one of the center of the forehead, the cheeks and the center of the chin.

[0043] For example, a user may take a portion of a sunscreen composition placed, for example, on the back or palm of a hand, and apply it to at least three points on the user's face. The amount of sunscreen composition to be applied may be equal or similar.

[0044] By placing the sunscreen composition on the area of ​​the cheeks near the nose, the sunscreen composition can be spread more evenly on the face by the cosmetic process according to the present invention.

[0045] Preferably, in step (2), the sunscreen composition should be applied to at least four points on the face, whereby these four points include any one of the following: the center of the forehead, the cheeks, the center of the nose, and the center of the chin.

[0046] It is more preferable that, in step (2), the sunscreen composition be placed on at least five points on the face, in which the at least five points may include the center of the forehead, the cheeks, the center of the nose and the center of the chin.

[0047] Thanks to step (2), it becomes easy to spread the sunscreen composition on the face. (Step 3)

[0048] Step (3) of the cosmetic process according to the present invention spreads the sunscreen composition after step (2) from the center to the periphery of the face with at least three fingers, applying a pressure of 1.5 N or less, preferably about 1 N.

[0049] It may be preferable for the pressure to be 0.2 N or more, and more preferably 0.3 N or more.

[0050] The pressure during application can be measured, for example, by a HAPTIC Force Plate (TF-2020, Tec Gihan Co., Ltd.) in which a pressure measuring sensor can be attached to the end of a finger.

[0051] In step (3), the sunscreen composition can be applied mainly to a relatively two-dimensional part of the face, such as the forehead and cheeks.

[0052] By spreading it with this light pressure, the sunscreen composition can be applied evenly to the face.

[0053] Using at least three fingers, this light pressure can be easily produced. The light pressure can be simulated by the pressure felt when touching sand without moving the surface of the sand.

[0054] It is preferable that the pressure be applied in step (3) with at least three curved fingers, more preferably along the profile of the face.

[0055] It may be preferable for the application to be carried out using at least one applicator. Any tool for spreading the sunscreen composition may be used. (Additional step)

[0056] Preferably, after step (3) of the cosmetic process according to the present invention, the sunscreen composition is spread on the nose and eyelids of the face with at least one finger, preferably applying the same pressure.

[0057] Thus, when spreading the sunscreen composition on the nose and eyelids of the face, the pressure is preferably 1.5 N or less, and more preferably about 1 N. It may be preferable for the pressure to be 0.2 N or more, and more preferably 0.3 N or more.

[0058] The pressure during application can be measured, for example, by a HAPTIC Force Plate (TF-2020, Tec Gihan Co., Ltd.) in which a pressure measuring sensor can be attached to the end of a finger.

[0059] The sunscreen composition can be applied to a relatively three-dimensional part of the face, i.e. the nose and eyelids.

[0060] By spreading it with this light pressure, the sunscreen composition can be applied evenly to the face.

[0061] It is preferable that the sunscreen composition be spread from the centre to the periphery of the face.

[0062] It may be preferable for the application to be carried out using at least one applicator. Any tool for spreading the sunscreen composition may be used. (Step 4)

[0063] Step (4) of the cosmetic process according to the present invention taps the face with at least three fingers to obtain a film of the sunscreen composition.

[0064] By using at least three fingers, the cosmetic film of the sunscreen composition on the face can easily be homogeneous or uniform.

[0065] For the three-dimensional part of the face, such as the nostrils and the contour of the eyes, a single finger can be used to tap.

[0066] There is no limit to the manner and amount of tapping. It is preferable to perform the tapping gently and continuously.

[0067] Step (4) can be performed with at least one device. The type of device and the manner in which the device is used are not limited. For example, an applicator can be used. Any tool can be used to facilitate tapping. (Optional step)

[0068] The cosmetic process according to the present invention may further include a step (5) of pressing the face with the hands, preferably with the palms of the hands.

[0069] The method of pressing and the number of presses in step (5) are not limited. It is preferable to perform the pressing several times in step (5).

[0070] By pressing, the cosmetic film of the sunscreen composition can adhere perfectly to the face.

[0071] It is preferable to press at least the forehead and cheeks of the face in step (5). It may be preferable that at least the cheeks of the face be pressed simultaneously in step (5).

[0072] Where appropriate, a mirror may be used to check or confirm the uniformity of a cosmetic film in the composition of the sunscreen. A sensation upon touch The face can also be used to check or confirm the uniformity of the cosmetic film on the face. (Gesture)

[0073] Fig. 2 presents an example of gestures in steps (2) to (5) of the cosmetic process according to the present invention.

[0074] Before step (2) illustrated in [Fig.2], 0.3 g or more of a sunscreen composition can be withdrawn from a container thereof, such as a tube, having a nozzle, by dispensing it from the nozzle in the form of a line to form a spiral shape two or three times, as shown in [Fig.1], on the hand.

[0075] In step (2) illustrated in [Fig.2], a sunscreen composition is placed with at least one finger at five points on the face, i.e. the center of the forehead, the cheeks (on the areas of the cheeks close to the nose), the center of the nose and the center of the chin.

[0076] In steps (3) illustrated in [Fig. 2], the sunscreen composition is spread from the center to the periphery of the face (see enlarged upper portion) using at least three fingers (see left enlarged portion). On the nose and eyelids, at least one finger is used to spread the sunscreen composition.

[0077] The spreading can be carried out smoothly with at least three fingers. During spreading, the pressure applied to the face is maintained at a maximum of 1.5 N. If a pressure measuring device is not available, it is preferable that the pressure be regulated so that the pressure does not displace a sand surface if the pressure were applied by touching a sand surface.

[0078] In step (4) illustrated in [Fig. 2], a tapping motion is performed to obtain a film of the sunscreen composition. It is preferable not to wipe or glide it along the face. On the nose and eyelids, at least one finger is used for tapping. Thanks to step (4), a homogeneous or uniform film of the sunscreen composition can be formed on the face.

[0079] In step (5) illustrated in [Fig. 2], the film of the sunscreen composition is pressed to adhere it to the face. It is preferable to press it several times. If necessary, a mirror can be used to check or confirm the uniformity of the film on the face. Touching the face can also be used to check or confirm the uniformity of the film. [Sunscreen Composition]

[0080] The sunscreen composition to be used for the cosmetic process according to the present invention may include (a) at least one UV filter.

[0081] The sunscreen composition to be used for the cosmetic process according to the present invention may further comprise:

[0082] (b) at least one fat; and

[0083] (c) at least one solvent.

[0084] The sunscreen composition to be used for the cosmetic process according to the present invention may further comprise (d) at least one surfactant and / or (e) at least one thickener.

[0085] It is preferable that, if the sunscreen composition to be used for the cosmetic process according to the present invention comprises: (a) at least one UV filter; (b) at least one fat; and (c) at least one solvent, the sunscreen composition further comprises (d) at least one surfactant and / or (e) at least one thickener.

[0086] The composition of the sunscreen to be used for the cosmetic process according to the present invention will be explained in more detail below. (UV filter)

[0087] The sunscreen composition to be used for the cosmetic process according to the present invention may comprise (a) at least one UV filter. Two or more different types of UV filters may be used in combination. Thus, a single type of UV filter or a combination of different types of UV filters may be used.

[0088] There is no limit as to the type of UV filter (a). The UV filter (a) can be chosen from inorganic UV filters, organic UV filters, and mixtures thereof. It is preferable that the UV filter (a) be chosen from organic UV filters.

[0089] The quantity of UV filter(s) (a) in the sunscreen composition may be 1% by weight or more, preferably 5% by weight or more and, more preferably 10% by weight or more, relative to the total weight of the composition.

[0090] Furthermore, the quantity of UV filter(s) (a) in the sunscreen composition may be 40% by weight or less, preferably 35% by weight or less, and more preferably 30% by weight or less, relative to the total weight of the composition.

[0091] The quantity of UV filter(s) (a) in the sunscreen composition can range from 1% to 40% by weight, preferably from 5% to 35% by weight and, more preferably, from 10% to 30% by weight, relative to the total weight of the composition. Inorganic UV filter#:

[0092] The UV filter (a) can be chosen from among the inorganic UV filters. If two or more inorganic UV filters are used, they can be identical or different.

[0093] The inorganic UV filter used for the present invention can be active in the UV-A and / or UV-B region. The inorganic UV filter can be hydrophilic and / or lipophilic. The inorganic UV filter is preferably insoluble in solvents such as water and ethanol commonly used in cosmetics.

[0094] It is preferable that the inorganic UV filter be in the form of a fine particle such that the average diameter of its (primary) particles ranges from 1 nm to 50 pm, preferably from 5 nm to 500 nm, and more preferably from 10 nm to 200 nm. The average size of (primary) particles or the average diameter of (primary) particles is here an arithmetic mean diameter.

[0095] The inorganic UV filter can be chosen from the group consisting of metal oxides which may be coated or not, and mixtures thereof.

[0096] Preferably, the inorganic UV filter is selected from pigments (average size of primary particles: generally from 5 nm to 50 nm, preferably from 10 nm to 50 nm) formed from metal oxides such as, for example, pigments formed from titanium dioxide (amorphous or crystalline in rutile and / or anatase form), iron oxide, zinc oxide, zirconium oxide, or cerium oxide, all of which are well-known UV photoprotective agents. Preferably, the inorganic UV filter is selected from titanium dioxide, zinc oxide, and more preferably titanium dioxide.

[0097] The inorganic UV filter may be coated or uncoated. The inorganic UV filter may have at least one coating. The coating may comprise at least one compound selected from the group consisting of alumina, silica, aluminum hydroxide, silicones, silanes, fatty acids or salts thereof (such as sodium, potassium, zinc, iron or aluminum salts), fatty alcohols, lecithin, amino acids, polysaccharides, proteins, alkanolamines, waxes such as beeswax, (meth)acrylic polymers, organic UV filters and (per)fluorinated compounds.

[0098] It is preferable that the coating include at least one organic UV filter. As an organic UV filter in the coating, a dibenzoylmethane derivative, such as butylmethoxydibenzoylmethane (Avobenzone) and 2,2'-methylenebis[6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethyl-butyl)phenol] (Methylene Bis-Benzotriazolyl Tetramethylbutylphenol) marketed under the name "TINOSORB M", by BASF may be preferable.

[0099] In a known manner, the silicones in the coating(s) may be organosilicon polymers or oligomers comprising a linear or cyclic and branched or crosslinked structure, of variable molecular weight, obtained by polymerization and / or polycondensation of suitable functional silanes and essentially composed of repeated main motifs in which the silicon atoms are linked to each other by oxygen atoms (siloxane bond), optionally substituted hydrocarbon radicals being directly linked to said silicon atoms by a carbon atom.

[0100] The term “silicones” also includes the silanes required for their preparation, in particular alkylsilanes.

[0101] The silicones used for the coating(s) may preferably be chosen from the group consisting of alkylsilanes, polydialkylsiloxanes and the polyalkylhydrosiloxanes. Even more preferably, silicones are chosen from the group consisting of octyltrimethylsilanes, polydimethylsiloxanes and polymethylhydrosiloxanes.

[0102] Of course, inorganic UV filters made of metal oxides may, before their treatment with silicones, have been treated with other coating agents, in particular with cerium oxide, alumina, silica, aluminum compounds, silicon compounds or mixtures thereof.

[0103] The coated inorganic UV filter may have been prepared by subjecting the inorganic UV filter to one or more surface treatments of a chemical, electronic, mechanochemical and / or mechanical nature with any of the compounds described above, as well as polyethylenes, metal alkoxides (titanium or aluminium alkoxides), metal oxides, sodium hexametaphosphate, and those presented, for example, in Cosmetics & Toiletries, February 1990, Vol. 105, pp. 53-64.

[0104] Coated inorganic UV filters can be titanium oxides coated with: • silica, such as the product “Sunveil” from Ikeda, and “Sunsil TIN 50” from Sunjin Chemical; • of silica and iron oxide, such as the product “Sunveil F” from Ikeda; • of silica and alumina, such as the products “Microtitanium Dioxide” MT 500 SA” from Tayca, “Tioveil” from Tioxide, and “Mirasun TiW 60” from Rhodia; • of alumina, such as the products “Tipaque TTO-55 (B)” and “Tipaque TTO-55 (A)” from Ishihara, and “UVT 14 / 4” from Kemira; • of alumina and aluminum stearate, such as the product "Microtitanium Dioxide MT 100 T, MT 100 TX, MT 100 Z or MT-01" from Tayca, the products "Solaveil CT-10 W" and "Solaveil CT 100" from Uniqema, and the product "Eusolex T-AVO" from Merck; • of alumina and aluminum laurate, such as the product "Microtitanium Dioxide MT 100 S" from Tayca; • iron oxide and iron stearate, such as the product "Microtitanium Dioxide MT 100 F" from Tayca; • zinc oxide and zinc stearate, such as Tayca's "BR351" product; • of silica and alumina and treated with silicone, such as the products “Microtitanium Dioxide MT 600 SAS”, “Microtitanium Dioxide MT 500 SAS” and “Microtitanium Dioxide MT 100 SAS” from Tayca; • of silica, alumina and aluminum stearate and treated with silicone, such as the product “STT-30-DS” from Titan Kogyo; • of silica and treated with a silicone, such as the product “UV-Titan X 195” from Kemira; • of alumina and treated with a silicone, such as the products “Tipaque TTO-55 (S)” from Ishihara or “UV Titan M 262” from Kemira; • triethanolamine, such as the product “STT-65-S” from Titan Kogyo; • stearic acid, such as the product "Tipaque TTO-55 (C)" from Ishihara or • of sodium hexametaphosphate, such as the product “Microtitanium Dioxide MT 150 W” from Tayca.

[0105] Other titanium oxide pigments treated with silicone are preferably TiO2 treated with octyltrimethylsilane and for which the average size of individual particles is 25 and 40 nm, such as that marketed under the brand name "T 805" by Degussa Silices, TiO2 treated with a polydimethylsiloxane and for which the average size of individual particles is 21 nm, such as that marketed under the brand name "70250 Cardre UF TiO2Si3" by Cardre, and TiO2 anatase / rutile treated with a polydimethylhydrosiloxane and for which the average size of individual particles is 25 nm, such as that marketed under the brand name "Microtitanium Dioxide USP Grade Hydrophobie" by Color Techniques.

[0106] Preferably, the following coated TiO2s can be used as coated inorganic UV filters:

[0107] Stearic acid (and) Aluminium Hydroxide (and) TiO2, such as Tayca's "MT-100 TV" product, with an average primary particle diameter of 15 nm;

[0108] Dimethicone (and) Stearic Acid (and) Aluminium Hydroxide (and) TiO2, such as the product "SA-TTO-S4" from Miyoshi Kasei, with a mean primary particle diameter of 15 nm;

[0109] Silica (and) TiO2, such as Tayca's "MT-100 WP" product, with a mean primary particle diameter of 15 nm;

[0110] Dimethicone (and) Silica (and) Aluminium Hydroxide (and) TiO2, such as Tayca's "MT-Y02" and "MT-Y-110 M3S" products, with a mean primary particle diameter of 10 nm;

[0111] Dimethicone (and) Aluminium Hydroxide (and) TiO2, such as the product “SA-TTO-S3” from Miyoshi Kasei, with an average primary particle diameter of 15 nm;

[0112] Dimethicone (and) Alumina (and) TiO2, such as the product "UV TITAN M170" from Sachtleben, with an average primary particle diameter of 15 nm; and

[0113] Silica (and) Aluminum Hydroxide (and) Alginic Acid (and) TiO2, such as Tayca's "MT-100 AQ" product, with a mean primary particle diameter of 15 nm.

[0114] In terms of UV filtering capacity, TiO2 coated with at least one organic UV filter is preferable. For example, Avobenzone (and) Stearic Acid (and) Aluminum Hydroxide (and) TiO2, such as Tayca's "HXMT-100ZA" product, with an average primary particle diameter of 15 nm, can be used.

[0115] Uncoated titanium oxide pigments are, for example, marketed by Tayca under the brands "Microtitanium Dioxide MT500B" or "Microtitanium Dioxide MT600B", by Degussa under the brand "P 25", by Wacker under the brand "Transparent Titanium Oxide PW", by Miyoshi Kasei under the brand "UFTR", by Tomen under the brand "ITS", and by Tioxide under the brand "Tioveil AQ".

[0116] Uncoated zinc oxide pigments are, for example: • those marketed under the brand name “Z-cote” by Sunsmart; • those marketed under the "Nanox" brand by Elementis and • those marketed under the brand name “Nanogard WCD 2025” by Nanophase Technologies.

[0117] Coated zinc oxide pigments are, for example: • those marketed under the brand name “Oxide Zinc CS-5” by Toshiba (ZnO coated with polymethylhydrosiloxane); • those marketed under the brand name “Nanogard Zinc Oxide FN” by Nanophase Technologies (in dispersion at 40% in alkyl benzoate Finsolv TN, C12-C15); • those marketed under the brand name “Daitopersion Zn-30” and “Daitopersion Zn-50” by Daito (dispersions in oxyethylenated polydimethylsiloxane / cyclopolymethylsiloxane comprising 30% or 50% of zinc nanooxides coated with silica and polymethylhydrosiloxane); • those marketed under the brand name “NFD Ultrafine ZnO” by Daikin (ZnO coated with perfluoroalkyl phosphate and a perfluoroalkylethyl copolymer dispersed in cyclopentasiloxane); • those marketed under the brand name “SPD-Z1” by Shin-Etsu (ZnO coated with an acrylic polymer grafted with silicone dispersed in cyclodimethylsiloxane); • those marketed under the brand name “Escalol Z100” by ISP (ZnO treated with alumina dispersed in an ethylhexyl methoxycinnamate / PVP-hexadecene / methicone copolymer mixture); • those marketed under the brand name “Fuji ZnO-SMS-10” by Fuji Pigment (ZnO coated with silica and polymethylsilsesquioxane); and those marketed under the brand name “Nanox Gel TN” by Elementis (ZnO dispersed at 55% in Ci2-Ci5 alkyl benzoate with hydroxystearic acid polycondensate).

[0118] Uncoated cerium oxide pigments are marketed, for example, under the brand name "Colloidal Cerium Oxide" by Rhone-Poulenc.

[0119] Uncoated iron oxide pigments are, for example, marketed by Arnaud under the brands "Nanogard WCD 2002 (FE 45B)", "Nanogard Iron FE 45 BL AQ", "Nanogard FE 45R AQ" and "Nanogard WCD 2006 (FE 45R)", or by Mitsubishi under the brand "TY-220".

[0120] Coated iron oxide pigments are, for example, marketed by Arnaud under the brands "Nanogard WCD 2008 (FE 45B FN)", "Nanogard WCD 2009 (FE 45B 556)", "Nanogard FE 45 BL 345" and "Nanogard FE 45 BL" or by BASF under the brand "Transparent iron oxide".

[0121] Other examples include mixtures of metal oxides, in particular titanium dioxide and cerium dioxide, including an equal weight mixture of silica-coated titanium dioxide and silica-coated cerium dioxide marketed by Ikeda under the brand name "Sunveil A", and a mixture of titanium dioxide and zinc dioxide coated with alumina, silica and silicone, such as the product "M 261" marketed by Kemira, or coated with alumina, silica and glycerol, such as the product "M 211" marketed by Kemira.

[0122] Coated inorganic UV filters are preferable because the UV filtering effects of inorganic UV filters can be enhanced. Furthermore, the coating(s) can help to disperse the UV filters uniformly or homogeneously within the composition according to the present invention.

[0123] The amount of inorganic UV filter(s) in the sunscreen composition may be 1% by weight or more, preferably 2% by weight or more and, more preferably 3% by weight or more, relative to the total weight of the composition.

[0124] Furthermore, the quantity of the organic UV filter(s) in the sunscreen composition may be 20% by weight or less, preferably 15% by weight or less, and more preferably 10% by weight or less, relative to the total weight of the composition.

[0125] The quantity of inorganic UV filter(s) in the sunscreen composition can range from 1% to 20% by weight, preferably from 2% to 15% by weight and, more preferably, from 3% to 10% by weight, relative to the total weight of the composition. Organic UV filter#:

[0126] The UV filter (a) can be selected from among the organic UV filters. If two or more organic UV filters are used, they can be identical or different.

[0127] The organic UV filter may be hydrophobic or insoluble in water. The organic UV filter may function as an oily ingredient. Thus, the organic UV filter may form discontinuous or internal phases of the composition according to the present invention, if the composition according to the present invention is in the form, for example, of an O / W emulsion.

[0128] The organic UV filter can be active in the UV-A and / or UV-B region. The organic UV filter can be lipophilic or oleosoluble.

[0129] The organic UV filter can be solid or liquid. The terms "solid" and "liquid" refer to a substance that is not fluid and a substance that is fluid, respectively, at 25 °C under 1 atm.

[0130] The organic UV filter may be selected from the group consisting of anthranilic compounds; dibenzoylmethane compounds; cinnamic compounds; salicylic compounds; camphor compounds; benzophenone compounds; [3,[3-diphenylacrylate] compounds; triazine compounds; benzotriazole compounds; benzalmalonate compounds; benzimidazole compounds; imidazoline compounds; bis-benzoazolyl compounds; p-aminobenzoic acid (PABA) compounds; methylenebis(hydroxyphenylb-nzotriazole) compounds; benzoxazole compounds; screening polymers and screening silicones; α-alkylstyrene derivative dimers; 4,4-diarylbutadiene compounds; guaiazulene and its derivatives; rutin and its derivatives; and mixtures thereof.

[0131] Examples of organic UV filter(s) include those listed below under their INCI names, and mixtures thereof. • Anthranilic compounds: Menthyl anthranilate, marketed under the brand name “Neo Heliopan MA” by Haarmann and Reimer. • Dibenzoylmethane compounds: Butyl methoxydibenzoylmethane, marketed in particular under the brand name “Parsol 1789” by Hoffmann-La Roche; and isopropyl dibenzoylmethane. • Cinnamic compounds: ethylhexyl methoxycinnamate, marketed notably under the brand name "Parsol MCX" by Hoffmann-La Roche; isopropyl methoxycinnamate; isopropoxy methoxycinnamate; isoamyl methoxycinnamate, marketed under the brand name "Neo Heliopan E 1000" by Haarmann and Reimer; cinoxate (2-ethoxyethyl-4-methoxycinnamate); DEA methoxycinnamate; diisopropyl methylcinnamate; and glyceryl ethylhexanoate dimethoxycinnamate. • Salicylic compounds: Homosalate (homomenthyl salicylate), marketed under the brand name "Eusolex HMS" by Rona / EM Industries; ethylhexyl salicylate, marketed under the brand name "Neo Heliopan OS" by Haarmann and Reimer; glycol salicylate; butyloctyl salicylate; phenyl salicylate; dipropylene glycol salicylate, marketed under the brand name "Dipsal" by Scher; and TEA salicylate, marketed under the brand name "Neo Heliopan TS" by Haarmann and Reimer. Camphor compounds, in particular benzylidenecamphor derivatives: 3-benzylidene camphor, manufactured under the brand name "Mexoryl SD" by Chimex; 4-methylbenzylidene camphor, marketed under the brand name "Eusolex 6300" by Merck; benzylidene dicamphor sulfonic acid, manufactured under the brand name "Mexoryl SL" by Chimex; camphor benzalkonium methosulfate, manufactured under the brand name "Mexoryl SO" by Chimex; and polyacrylamidomethyl benzylidene camphor, manufactured under the brand name "Mexoryl SW" by Chimex. Benzophenone compounds: Benzophenone-1 (2,4-dihydroxybenzophenone), marketed under the brand name "Uvinul 400" by BASF; benzophenone-2 (tetrahydroxybenzophenone), marketed under the brand name "Uvinul D50" by BASF; Benzophenone-3 (2-hydroxy-4-methoxybenzophenone) or oxybenzone, marketed under the brand name "Uvinul M40" by BASF; benzophenone-4 (hydroxymethoxybenzophenonesulfonic acid), marketed under the brand name "Uvinul MS40" by BASF; benzophenone-5 (sodium hydroxymethoxybenzophenone sulfonate); benzophenone-6 (dihydroxydimethoxybenzophenone), marketed under the brand name "Helisorb 11" by Norquay; benzophenone-8, marketed under the brand name "Spectra-Sorb UV-24" by American Cyanamid; benzophenone-9 (disodium dihydroxydimethoxybenzophenonedisulfonate), marketed under the brand name "UVINUL DS-49" by BASF; benzophenone-12, and n-hexyl 2-(4-diethylamino-2-hydroxybenzoyl)benzoate (UVINUL A+ by BASF). Compounds of [3,[3-diphenylacrylate: Octocrylene, marketed notably under the brand name "Uvinul N539" by BASF; and Etocrylene, marketed notably under the brand name "Uvinul N35" by BASF. Triazine compounds: Diethylhexyl butamido triazone, marketed under the brand name "Uvasorb HEB" by Sigma 3V; 2,4,6-tris(dineopentyl 4'-aminobenzalmalonate)-s-triazine, bis-ethylhexyloxyphenol methoxyphenyl triazine marketed under the brand name "TINOSORB S" by CIBA GEIGY, and ethylhexyl triazone marketed under the brand name "UVINUL T150" by BASF. Benzotriazole compounds, especially phenylbenzotriazole derivatives: 2-(2H-benzotriazole-2-yl)-6-dodecyl-4-methylpheno, branched and linear; and those described in USP 5240975. Benzalmalonate compounds: Dineopentyl 4'-methoxybenzalmalonate, and polyorganosiloxanes comprising benzalmalonate functional groups, such as polysilicone-15, marketed under the brand name "Sol SLX" by Hoffmann-LaRoche. • Benzimidazole compounds, in particular phenylbenzimidazole derivatives. • Imidazoline compounds: Ethylhexyl dimethoxybenzylidene dioxoimidazoline propionate. • Bis-benzoazolyl compounds: derivatives as described in EP-669 323 and US Patent No. 2 463 264. • Para-aminobenzoic acid compounds: PABA (p-aminobenzoic acid), ethyl PABA, ethyl dihydroxypropyl PABA, pentyl dimethyl PABA, ethylhexyl dimethyl PABA, marketed in particular under the brand name "Escalol 507" by ISP, glyceryl PABA and PEG-25 PABA, marketed under the brand name "Uvinul P25" by BASF. • Methylene bis-(hydroxyphenylbenzotriazole) compounds, such as 2,2'-methylenebis[6-(2H-benzotriazol-2-yl)-4-methylphenol] marketed as a solid under the brand name "Mixxim BB / 200" by Fairmount Chemical, 2,2'-methylenebis[6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol] marketed as a micronized aqueous dispersion under the brand name "Tinosorb M" by BASF, or under the brand name "Mixxim BB / 100" by Fairmount Chemical, and derivatives as described in US Patent Nos. 5,237,071 and 5,166,355, GB-2,303,549, DE-197,26184 and EP-893,119, and

[0132] Drometrizole trisiloxane, marketed under the brand name "Silatrizole" by Rhodia Chimie or "Mexoryl XL" by L'Oréal, as represented below. / ^4 / ' HO ,,.......< O.....Si" \ / \ \ rr 'n..... / ) \ • Benzoxazole compounds: 2,4-bis[5-l(dimethylpropyl)benzoxazol-2-yl-(4-phenyl)imino]-6-(2-ethylhexyl)imino-l,3,5-triazine, marketed under the brand name Uvasorb K2A by Sigma 3V. • Screen polymers and screen silicones: silicones described in WO 93 / 04665. • α-Alkylstyrene derived dimers: the dimers described in DE-19855649. • Compounds of 4,4-diarylbutadiene: l,l-dicarboxy(2,2'-dimethylpropyl)-4,4-diphenylbutadiene.

[0133] Il est préférable que le filtre organique UV soit choisi dans le groupe consistant en : butyl methoxydibenzoylmethane, ethylhexyl methoxycinnamate, homosalate, ethylhexyl salicylate, octocrylene, benzophenone-3, benzophenone-4, benzophenone-5, n-hexyl 2-(4-diethylamino-2-hydroxybenzoyl)benzoate, 1,1’ -( 1,4-piperazinediyl)bi s [ 1 - [2- [4-(diethylamino)-2-hydroxybenzoyl]phenyl] -methanone 4-methylbenzylidene camphor, ethylhexyl triazone, bis-ethylhexyloxyphenol methoxyphenyl triazine, diethylhexyl butamido triazone, 2,4,6-tris(dineopentyl 4’-aminobenzahnalonate)-s-triazine, 2,4,6-tris(diisobutyl 4’-aminobenzalmalonate)-s-triazine, 2,4-bis-(n-butyl 4’-aminobenzalmalonate)-6-[(3-{ l,3,3,3-tetramethyl-l-[(trimethylsilyloxy]disiloxanyl]pr opyl)amino]-s-triazine, 2,4,6-tris-(di-phenyl)-triazine, 2,4,6-tris-(ter-phenyl)-triazine, methylene bis-benzotriazolyl tetramethylbutylphenol, drometrizole trisiloxane, polysilicone-15, dineopentyl 4’-methoxybenzalmalonate, l,l-dicarboxy(2,2'-dimethylpropyl)-4,4-diphenylbutadiene, 2,4-bis[5-1 (dimethylpropyl)benzoxazol-2-yl-(4-phenyl)imino]-6-(2-ethylhexyl)imino-1,3,5-triazine, camphor, benzylkonium methosulfate and mixtures thereof.

[0134] It is more preferable that the organic UV filter be chosen from the group consisting of ethylhexyl methoxycinnamate, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl triazone, drometrizole trisiloxane, terephthalylidene dicamphor sulfonic acid, and one of their mixtures.

[0135] The quantity of the organic UV filter(s) in the sunscreen composition may be 1% by weight or more, preferably 5% by weight or more and, more preferably 10% by weight or more, relative to the total weight of the composition.

[0136] Furthermore, the quantity of the organic UV filter(s) in the sunscreen composition may be 35% by weight or less, preferably 30% by weight or less, and more preferably 25% by weight or less, relative to the total weight of the composition.

[0137] The quantity of the organic UV filter(s) in the sunscreen composition can range from 1% to 35% by weight, preferably from 5% to 30% by weight and, more preferably, from 10% to 25% by weight, relative to the total weight of the composition. (Fat)

[0138] The sunscreen composition to be used for the cosmetic process according to the present invention may comprise (b) at least one fat. Two or more fats may be used in combination. Thus, a single type of fat or a combination of different types of fats may be used.

[0139] The composition according to the present invention comprises (b) at least one fat. Two or more different types of fat (b) may be used in combination. Thus, a single type of fat (b) or a combination of different types of fat (b) may be used.

[0140] By "fat" is meant an organic compound which is insoluble in water at ordinary temperature (25 °C) and atmospheric pressure (760 mmHg) (solubility less than 5%, preferably 1% and even more preferably 0.1%).

[0141] The fat may be in liquid or solid form. Here, "liquid" and "solid" mean that the fat is in the form of a liquid or a (non-solid) paste or solid, respectively, at room temperature (25 °C) under atmospheric pressure (760 mmHg or 105 Pa). Preferably, the fat comprises at least one component in the form of a paste or a solid, preferably in the form of a solid, at room temperature and under atmospheric pressure.

[0142] The fat may be selected from the group consisting of oils of animal or vegetable origin, mineral oils, synthetic glycerides, fatty alcohol esters and / or fatty acids other than animal or vegetable oils and synthetic glycerides, fatty alcohols, fatty acids, silicone oils and aliphatic hydrocarbons. These fats may be volatile or non-volatile. Preferably, the fat is selected from the group consisting of oils of animal or vegetable origin, synthetic glycerides, fatty esters other than animal or vegetable oils and synthetic glycerides, fatty alcohols, fatty acids, silicone oils and aliphatic hydrocarbons. More preferably, the fat (b) is selected from fatty alcohols, aliphatic hydrocarbons, preferably mineral oils, and mixtures thereof.

[0143] Examples of aliphatic hydrocarbons include, for example, linear or branched hydrocarbons such as mineral oil (e.g., liquid paraffin), paraffin, Vaseline or petrolatum, naphthalenes, and the like; hydrogenated polyisobutene, isoeicosane, polydecenes, hydrogenated polyisobutenes such as Parleam, and a decene / butene copolymer; and mixtures thereof.

[0144] By way of examples of other aliphatic hydrocarbons, one may also mention the linear or branched, or possibly cyclic, lower C6-Ci6 alkanes. Examples that may be cited include hexane, undecane, dodecane, tridecane, and isoparaffins such as isohexadecane, isodecane, and a Ci3-C isoparaffin

[0145] Examples of synthetic glycerides include caprylic / capric acid triglycerides, for example those sold by Stéarineries Dubois or those sold under the names Miglyol® 810, 812 and 818 by Dynamit Nobel.

[0146] Examples of silicone oils include, for example, linear organopolysiloxanes such as dimethylpolysiloxanes, methylphenylpolysiloxanes, methylhydrogenopolysiloxanes and the like; cyclic organopolysiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, and the like; and mixtures thereof.

[0147] Examples of vegetable oils include linseed oil, camellia oil, macadamia nut oil, sunflower oil, apricot oil, soybean oil, arara oil, hazelnut oil, corn oil, mink oil, olive oil, avocado oil, sasanqua oil, castor oil, safflower oil, jojoba oil, almond oil, grapeseed oil, sesame oil, peanut oil, and mixtures thereof. Examples of animal oils include squalene, perhydrosqualene, and squalane.

[0148] By way of examples of esters of a fatty acid and / or a fatty alcohol, which are advantageously different from the animal or vegetable oils and synthetic glycerides mentioned above, we may mention in particular the esters of mono- or polyaliphatic acids, saturated or unsaturated, linear or branched in Ci-C26 and of mono- or polyaliphatic alcohols, saturated or unsaturated, linear or branched in Ci-C26> the total number of carbons of the esters being greater than or equal to 10.

[0149] Among the monoesters, the following may be mentioned: dihydroabietyl behenate; octyldodecyl behenate; isocetyl behenate; cetyl lactate; Ci2-Ci5 alkyl lactate; isostearyl lactate; lauryl lactate; linoleyl lactate; oleyl lactate; (iso)stearyl octanoate; isocetyl octanoate; octyl octanoate; cetyl octanoate; decyl oleate; isocetyl isostearate; isocetyl laurate; isocetyl stearate; isodecyl octanoate; isodecyl oleate; isononyl isonanoate; isostearyl palmitate; methylacetyl ricinoleate; myristyle stearate; octyl isononanoate; 2-ethylhexyl isononate; octyl palmitate; octyl pelargonate; octyl stearate; octyldodecyl erucate; oleyl erucate;ethyl and isopropyl palmitates, 2-ethylhexyl palmitate, 2-octyldecyl palmitate, alkyl myristates such as isopropyl, butyl, cetyl, 2-octyldodecyl, myristyle or stearyl myristate, hexyl stearate, butyl stearate, isobutyl stearate; dioctyl malate, hexyl laurate, and 2-hexyldecyl laurate.

[0150] The composition may also include, as fatty acid esters, sugar esters and diesters of C6-C30 fatty acids and preferably of C2-C22 fatty acids. The term "sugar" refers to oxygenated hydrocarbon compounds containing several alcohol functional groups, with or without aldehyde or ketone functional groups, and which contain at least four carbon atoms. These sugars may be monosaccharides, oligosaccharides, or polysaccharides.

[0151] Examples of suitable sugars that may be mentioned include sucrose, glucose, galactose, ribose, fructose, maltose, mannose, arabinose, xylose, lactose and their derivatives, in particular alkylated derivatives, such as methylated derivatives, for example methylglucose.

[0152] Sugar esters of fatty acids may be selected in particular from the group comprising esters or mixtures of esters of the sugars described above and of linear or branched fatty acids, saturated or unsaturated in C6-C30, and preferably in Ci2-C22. If they are unsaturated, these compounds may comprise one to three conjugated or non-conjugated carbon-carbon double bonds.

[0153] These esters can be selected, for example, from oleates, laurates, palmitates, myristates, behenates, cocoates, stearates, linoleates, linolenates, caprates and arachidonates, or mixtures thereof such as, in particular, mixed esters of oleopalmitate, oleostearate and palmitostearate.

[0154] The fat (b) may be chosen from fatty alcohols, and two or more fatty alcohols may be used.

[0155] The term "fatty alcohol" herein refers to any saturated or unsaturated, linear or C8-C30 branched fatty alcohol that is optionally substituted, in particular with one or more hydroxyl groups (in particular 1 to 4). If unsaturated, these compounds may comprise one to three conjugated or non-conjugated carbon-carbon double bonds.

[0156] Among C8-C30 fatty alcohols, C2-C22 fatty alcohols, for example, are used. Examples of these include lauryl alcohol, cetyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, behenyl alcohol, linoleyl alcohol, undecylenyl alcohol, palmitoleyl alcohol, linolenylic alcohol, myristyl alcohol, arachidonyl alcohol, and erucyl alcohol, and mixtures thereof. In one embodiment, cetyl alcohol, stearyl alcohol, or a mixture thereof (for example, cetearyl alcohol), as well as myristyl alcohol, may be used as a solid fat. In another embodiment, isostearyl alcohol can be used as a liquid fat.

[0157] The fat (b) may be chosen from waxes. Here, "wax" means that the fat is essentially in the form of a solid at temperature At ambient temperature (25 °C) under atmospheric pressure (760 mmHg), and generally have a melting point of 35 °C or higher. As waxy fats, waxes commonly used in cosmetics can be used alone or in combination.

[0158] The amount of fat(s) (b) in the sunscreen composition may be 0.1% by weight or more, preferably 0.3% by weight or more, and more preferably 0.5% by weight or more, relative to the total weight of the composition.

[0159] Furthermore, the quantity of the fat(s) (b) in the sunscreen composition may be 20% by weight or less, preferably 15% by weight or less, and more preferably 10% by weight or less, relative to the total weight of the composition.

[0160] The quantity of fat(s) (b) in the sunscreen composition may range from 0.1% to 20% by weight, preferably from 0.3% to 15% by weight, more preferably from 0.5% to 10% by weight, relative to the total weight of the composition. (Solvent)

[0161] The sunscreen composition to be used for the cosmetic process according to the present invention may comprise (c) at least one solvent. Two or more solvents may be used in combination. Thus, a single type of solvent or a combination of different types of solvents may be used.

[0162] The solvent (c) can be chosen from water, monovalent alcohols, polyvalent alcohols and mixtures thereof.

[0163] The term "monovalent alcohol" here refers to an alcohol having a hydroxy group. Examples of monovalent alcohols include ethyl alcohol, isopropyl alcohol, benzyl alcohol, and phenylethyl alcohol.

[0164] The term "polyvalent alcohol" or polyol here refers to an alcohol having two or more hydroxyl groups, and does not include a saccharide or one of its derivatives. A saccharide derivative includes a sugar alcohol obtained by reducing one or more carbonyl groups of a saccharide, as well as a saccharide or sugar alcohol in which the hydrogen atom(s) in one or more of its hydroxyl groups has been replaced by at least one substituent such as an alkyl group, a hydroxyalkyl group, an alkoxy group, an acyl group, or a carbonyl group.

[0165] The monovalent or polyvalent alcohols used in the present invention are liquid at room temperature, such as 25 °C, under atmospheric pressure (760 mmHg or 105 Pa).

[0166] The polyol may be a C2-C24 polyol, preferably a C2-C9 polyol, comprising at least 2 hydroxy groups, and preferably 2 to 5 hydroxy groups.

[0167] The polyol can be natural or synthetic. The polyol can have a linear, branched, or cyclic molecular structure.

[0168] The polyol can be selected from glycerins, glycols and mixtures thereof. The polyol can be selected from the group consisting of glycerin, diglycerin, a polyglycerin, ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, butylene glycol, pentylene glycol, hexylene glycol, a C6-C24 polyethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, and a mixture thereof.

[0169] It is preferable that the polyol be chosen from the group consisting of glycerin, ethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, butylene glycol, propylene glycol, pentylene glycol, hexylene glycol, and a mixture thereof.

[0170] The quantity of solvent(s) (c) in the sunscreen composition may be 20% by weight or more, preferably 30% by weight or more, and more preferably 40% by weight or more, relative to the total weight of the composition.

[0171] Furthermore, the quantity of solvent(s) (c) in the sunscreen composition may be 90% by weight or less, preferably 80% by weight or less, and more preferably 70% by weight or less, relative to the total weight of the composition.

[0172] The quantity of solvent(s) (c) in the sunscreen composition may range from 20% to 90% by weight, preferably from 30% to 80% by weight, more preferably from 40% to 70% by weight, relative to the total weight of the composition. (Surfactant)

[0173] The sunscreen composition to be used for the cosmetic process according to the present invention may comprise (d) at least one surfactant. Two or more surfactants may be used in combination. Thus, a single type of surfactant or a combination of different types of surfactants may be used.

[0174] The surfactant (d) used in the present invention can be chosen from the group consisting of anionic surfactants, amphoteric surfactants, cationic surfactants and non-ionic surfactants.

[0175] The amount of the surfactant(s) (d) in the sunscreen composition may be 1% by weight or more, preferably 3% by weight or more, and more preferably 5% by weight or more, relative to the total weight of the composition.

[0176] Furthermore, the quantity of the surfactant(s) (d) in the sunscreen composition may be 20% by weight or less, preferably 15% by weight or less, and more preferably 10% by weight or less, relative to the total weight of the composition.

[0177] The quantity of the surfactant(s) (d) in the sunscreen composition may range from 1% to 20% by weight, preferably from 3% to 15% by weight, more preferably from 5% to 10% by weight, relative to the total weight of the composition. (Thickening)

[0178] The sunscreen composition to be used for the cosmetic process according to the present invention may include (e) at least one thickener. Two or more thickeners may be used in combination. Thus, a single type of thickener or a combination of different types of thickeners may be used.

[0179] The thickener(e) or thickening agent may be chosen from organic and inorganic thickeners.

[0180] Organic thickeners may be selected from at least one of the following: i. associative thickeners; ii. crosslinked acrylic acid homopolymers; iii. CrC6 crosslinked copolymers of (meth)acrylic acid and alkyl acrylate; iv. non-ionic homopolymers and copolymers comprising at least one monomer among ethylenically unsaturated ester monomers and ethylenically unsaturated amide monomers; v. ammonium acrylate homopolymers and ammonium acrylate and acrylamide copolymers; vi. polysaccharides; and vii. fatty alcohols in the Ci2-C30 range.

[0181] (i) As used herein, the expression "associative thickener" means an amphiphilic thickener comprising both hydrophilic and hydrophobic motifs, for example, at least one C8-C30 fatty chain and at least one hydrophilic motif.

[0182] Representative associative thickeners that can be used are associative polymers selected from:

[0183] (aa) non-ionic amphiphilic polymers comprising at least one fatty chain and at least one hydrophilic motif;

[0184] (bb) anionic amphiphilic polymers comprising at least one hydrophilic motif and at least one fatty chain motif;

[0185] (cc) cationic amphiphilic polymers comprising at least one hydrophilic motif and at least one fatty chain motif; and

[0186] (dd) amphoteric amphiphilic polymers comprising at least one hydrophilic motif and at least one fatty chain motif,

[0187] in which the fatty chain contains from 8 to 30 carbon atoms.

[0188] Non-ionic amphiphilic (aa) polymers comprising at least one fatty chain and at least one hydrophilic motif may, for example, be selected from: 1. Cellulose modified by groups comprising at least one fatty chain; examples that may be cited include:

[0189] - hydroxyethylcelluloses modified by groups comprising at least a fatty chain selected from alkyl, arylalkyl and alkylaryl groups, and in which the alkyl groups are, for example, in C8-C22, such as the product Natrosol Plus Grade 330 CS (alkyls in C1-C6) sold by the company Aqualon, and the product Bermocoll EHM 100 sold by the company Berol Nobel, and

[0190] - celluloses modified by alkylphenyl ether groups of polyalkylene glycol, such as the Amercell Polymer HM-1500 product (nonylphenyl polyethylene glycol ether (15)) sold by the company Amerchol. 1. Hydroxypropyl guars modified by groups including at least one fatty chain, such as the product Esaflor HM 22 (alkyl chain in C22) sold by the company Lamberti, and the products Miracare XC95-3 (alkyl chain in CM) and RE205-1 (alkyl chain in C2o) sold by the company Rhodia Chimie. 2. Polyether methanes comprising at least one fatty chain, such as alkyl or alkenyl groups in C10-C30, for example the products Elfacos T 210 and Elfacos T 212 sold by Akzo or the products Aculyn 44 and Aculyn 46 sold by Rohm & Haas. 3. copolymers of vinylpyrrolidone and hydrophobic fatty chain monomers;

[0191] Examples that may be cited include:

[0192] - the products Antaron V216 and Ganex V216 (vinylpyrrolidone copolymer / hexadecene) sold by the company LS.P., and

[0193] - the products Antaron V220 and Ganex V220 (vinylpyrrolidone / eicosene copolymer) sold by the company LS.P. 1. Copolymers of acrylates or alkyl methacrylates in Ci-C6 and amphiphilic monomers comprising at least one fatty chain, such as the oxyethylenated methyl methacrylate / stearyl acrylate copolymer sold by the Goldschmidt company under the name Antil 208. 2. Copolymers of hydrophilic acrylates or methacrylates and hydrophobic monomers comprising at least one fatty chain, such as a polyethylene glycol methacrylate / lauryl methacrylate copolymer.

[0194] Anionic amphiphilic polymers (bb) comprising at least one hydrophilic motif and at least one fatty chain motif may, for example, be selected from those comprising at least one fatty chain allyl ether motif and at least one hydrophilic motif comprising an ethylenically unsaturated anionic monomer motif, for example, a vinylcarboxylic acid motif and furthermore, for example, be selected from motifs derived from acrylic acids, methacrylic acids, and mixtures thereof, wherein the fatty-chain allyl ether motif corresponds to the monomer of formula (I) below:

[0195] CH2=C(R|)CH2OBriR (I)

[0196] wherein Ri is selected from H and CH3, B is an ethyleneoxy radical, n is selected from zero and the integers from 1 to 100, R is selected from hydrocarbon-based radicals selected from alkyl, arylalkyl, aryl, alkylaryl, and cycloalkyl radicals, containing from 10 to 30 carbon atoms, and furthermore, for example, from 10 to 24 carbon atoms and furthermore, for example, from 12 to 18 carbon atoms.

[0197] In one embodiment, a motif of formula (I) is, for example, a motif in which Ri can be H, n can be equal to 10, and R can be a stearyl radical (Ci8).

[0198] Anionic amphiphilic polymers of this type are described and prepared, according to an emulsion polymerization process, in patent EP-0 216 479 B2.

[0199] In one embodiment, the anionic amphiphilic polymers are, for example, polymers formed from 20% to 60% by weight of acrylic acid and / or methacrylic acid, from 5% to 60% by weight of lower alkyl (meth)acrylates, from 2% to 50% by weight of fat-chain allyl ether of formula (I), and from 0% to 1% by weight of a crosslinking agent which is a well-known copolymerizable unsaturated polyethylene monomer, for example, diallyl phthalate, allyl (meth)acrylate, divinylbenzene, (poly)ethylene glycol dimethacrylate, and methylenebisacrylamide.

[0200] Examples of such polymers are crosslinked terpolymers of methacrylic acid, ethyl acrylate and polyethylene glycol (10 OE) stearyl ether (Steareth-10), such as those sold by the Ciba company under the names Salcare SC 80 and Salcare SC 90, which are 30% aqueous emulsions of a crosslinked terpolymer of methacrylic acid, ethyl acrylate and steareth-10 allyl ether (40 / 50 / 10).

[0201] Anionic amphiphilic polymers may further be selected, for example, from those comprising at least one hydrophilic motif of the unsaturated olefinic carboxylic acid type, and at least one hydrophobic motif of a type such as an alkyl ester (C10-C30) of an unsaturated carboxylic acid. The hydrophilic motif of the unsaturated olefinic carboxylic acid type corresponds, for example, to the monomer of formula (II) below: C™" OH * hh R Ô

[0202] wherein R1 is selected from H, CH3, and C2H5, i.e., the acrylic acid, methacrylic acid, and ethacrylic acid motifs. The hydrophobic motif of a type such as an alkyl ester (C10-C30) of an unsaturated carboxylic acid corresponds, for example, to the monomer of formula (III) below: (III)

[0203] wherein R1 is selected from H, CH3, and C2H5 (i.e. acrylate, methacrylate and ethacrylate motifs) and is, for example, selected from H (acrylate motifs) and CH3 (methacrylate motifs), and R2 is selected from the Ci0-C30 alkyl radicals, for example, the Ci2-C22 alkyl radicals.

[0204] Examples of alkyl esters (Ci0-C30) of unsaturated carboxylic acids include lauryl acrylate, stearyl acrylate, decyl acrylate, isodecyl acrylate, and dodecyl acrylate, and the corresponding methacrylates, lauryl methacrylate, stearyl methacrylate, decyl methacrylate, isodecyl methacrylate, and dodecyl methacrylate.

[0205] According to a preferred embodiment, these thickening polymers are cross-linked.

[0206] Anionic amphiphilic polymers of this type are disclosed and prepared, for example, according to US patents No. 3,915,921 and 4,509,949.

[0207] Representative anionic amphiphilic polymers that can be used may further be selected from polymers formed from a mixture of monomers comprising: i. ii. acrylic acid, an ester of formula (III) described above in which R2 denotes H or CH3 and R3 designates an alkyl radical having 12 to 22 carbon atoms, and iii. a crosslinking agent which is a well-known copolymerizable unsaturated polyethylene monomer, such as diallyl phthalate, allyl (meth)acrylate, allyl sucrose ether, allyl pentaerythritol ether, divinylbenzene, (poly)ethylene glycol dimethacrylate and methyllenebis acrylamide.

[0208] Among copolymers of this type, particularly those composed of 95 to 60% by weight of acrylic acid (hydrophilic motif), 4 to 40% by weight of C10-C30 alkyl acrylate (hydrophobic motif) and 0 to 6% by weight of a polymerizable crosslinking monomer, or those composed of 98 to 96% by weight of acrylic acid (hydrophilic motif), 1 to

[0209] 4 wt% of alkyl acrylate as CiO_C3O (hydrophobic motif) and 0.1 to 0.6 wt% in weight of a polymerizable crosslinking monomer, such as those described above.

[0210] According to the present invention, among the above-mentioned polymers, acrylate / alkyl acrylate copolymers in C10-C30 (INCI name: Acrylates / C10-C30 Alkyl Acrylate Crosspolymer) are particularly preferred, such as the products sold by Lubrizol under the trade names Pemulen® TRI, Pemulen® TR2, Carbopol® Ultrez 20 Polymer,

[0211] Carbopol® 1382 and Carbopol® EDT 2020.

[0212] Among the anionic amphiphilic fatty chain polymers, we can also mention, for example, the ethoxylated copolymer of methacrylic acid / methyl acrylate / alkyl dimethyl-meta-isopropenylbenzylisocyanate sold under the name Viscophobe DB 1000 by the company Amerchol.

[0213] The cationic amphiphilic polymers (cc) used are, for example, chosen from quaternized cellulose derivatives and polyacrylates comprising amino side groups.

[0214] Quatemized cellulose derivatives are, for example, selected from

[0215] quaternized celluloses modified by groups comprising at least one fatty chain, such as alkyl, arylalkyl, alkylaryl groups comprising at least 8 carbon atoms, and mixtures thereof, and

[0216] quaternized hydroxyethylcelluloses modified by groups comprising at least one fatty chain, such as alkyl, arylalkyl and alkylaryl groups comprising at least 8 carbon atoms, and mixtures thereof.

[0217] Quaternized and non-quaternized polyacrylates comprising amino side groups have, for example, hydrophobic groups, such as steareth 20 (polyoxyethylenated stearyl alcohol (20)) and alkyl itaconate (Cio-C3o)PEG-20.

[0218] The alkyl radicals carried by the quaternized celluloses and hydroxyethylcelluloses above, for example, contain from 8 to 30 carbon atoms.

[0219] Aryl radicals, for example, are chosen from among the phenyl, benzyl, naphthyl or anthryl groups.

[0220] Examples of quaternized alkylhydroxyethylcelluloses comprising C8-C30 fatty chains are the products Quatrisoft LM 200, Quatrisoft LM-X 529-18-A, Quatrisoft LM-X 529-18B (C12 alkyl), and Quatrisoft LM-X 529-8 (Ci8 alkyl) sold by the company Amerchol, and the products Crodacel QM, Crodacel QL (C12 alkyl), and Crodacel QS (C[8] alkyl) sold by the company Croda.

[0221] Examples of polyacrylates comprising amino side chains are polymers 8781-124B or 9492-103 and Structure Plus from National Starch.

[0222] Examples of amphoteric amphiphilic polymers (dd) comprising at least one hydrophilic motif and at least one fatty chain motif include methacrylamidopropyltrimethylammonium chloride / acid copolymers alkyl acrylic / methacrylate in C10-C30, in which the alkyl radical is for example a stearyl radical.

[0223] The associative thickeners in the compositions may have, for example in solution or dispersion at a concentration of 1% of active material in water, a viscosity, measured using a Rheomat RM 180 rheometer at 25 °C, greater than 0.1 ps and more, for example, greater than 0.2 cp, at a shear rate of 200 s

[0224] (ii) Among the crosslinked acrylic acid homopolymers, mention may be made of those crosslinked with an allylic alcohol ether of the sugar series. An example is carbomer, which is a homopolymer of acrylic acid crosslinked with an allyl ether of pentaerythritol, an allyl ether of sucrose or an allyl ether of propylene, such as the products sold under the names Carbopol 980, 981, 954, 2984 and 5984 by the Lubrizol company or the products sold under the names Synthalen M and Synthalen K by the 3 VS A company.

[0225] (iii) Crosslinked copolymers of (meth)acrylic acid and C1-C6 alkyl acrylate may be selected from crosslinked copolymers of methacrylic acid and ethyl acrylate in the form of an aqueous dispersion comprising 38% of the active material sold, for example, under the name Viscoatex 538C by Coatex, and crosslinked copolymers of acrylic acid and ethyl acrylate in the form of an aqueous dispersion comprising 28% of the active material sold under the name Aculyn 33 by Rohm & Haas. Crosslinked copolymers of methacrylic acid and ethyl acrylate include an aqueous dispersion comprising 30% of the active material sold under the name CARBOPOL AQUA SF-1 by NOVEON.

[0226] (iv) Among the non-ionic homopolymers or copolymers comprising ester and / or amide type monomers with ethylenic unsaturation, examples include products sold under the names: Cyanamer P250 by Cytec (polyacrylamide); PMMA MBX-8C by US Cosmetics (methyl methacrylate / ethylene glycol dimethacrylate copolymer); Acryloid B66 by Rohm & Haas (butyl methacrylate / methyl methacrylate copolymer); and BPA 500 by Kobo (polymethyl methacrylate).

[0227] By way of example, one may also cite at least one water-soluble or water-dispersible polymer, crosslinked or non-crosslinked, comprising at least one monomer of acrylamido-2-methylpropanesulfonic acid (AMPS).

[0228] The AMPS (co)polymer may preferably be totally neutralized or practically totally neutralized, i.e. neutralized at least 90%.

[0229] AMPS (co)polymers may be crosslinked or non-crosslinked.

[0230] Examples of AMPS (co)polymers that may be cited include:

[0231] crosslinked acrylamide / acrylamido-2-methylpropanesulfonate sodium copolymers, such as the copolymer in the commercial product Sepigel 305 (INCI name: Polyacrylamide / Ci3-Ci4 Isoparaffin / Laureth-7) or the copolymer in the commercial product sold under the brand name Simulgel 600 (INCI name: Acrylamide / Sodium Acryloyldimethyltaurate / Isohexadecane / Polysorbate-80) by SEPPIC;

[0232] copolymers of AMPS and vinylpyrrolidone or vinylformamide, such as the copolymer in the commercial product sold under the name Aristoflex AVC by Clariant (INCI name: Ammonium acryloyldimethyltaurate / VP Copolymer), but neutralized with sodium hydroxide or potassium hydroxide;

[0233] copolymers of AMPS and sodium acrylate such as, for example, the AMPS / sodium acrylate copolymer such as the copolymer in the commercial product sold under the name Simulgel EG by SEPPIC (INCI name: Sodium Acrylate / Sodium Acryloyldimethyltaurate Copolymer (and) Isohexadecane (and) Polysorbate-80); and

[0234] copolymers of AMPS and hydroxyethyl acrylate, for example the AMPS / hydroxyethyl acrylate copolymer such as the copolymer in the commercial product sold under the name Simulgel NS by SEPPIC (INCI name: Hydroxyethyl acrylate / Sodium Acryloyldimethyltaurate copolymer (and) Squalane (and) Polysorbate-60).

[0235] It may be preferable for the AMPS (co)polymer to be a copolymer of acrylamide / sodium acryloyldimethyltaurate.

[0236] (v) Ammonium acrylate homopolymers that may be cited include the product sold under the name Microsap PAS 5193 by the company Hoechst.

[0237] Ammonium acrylate and acrylamide copolymers include the product sold under the name Bozepol C Nouveau or the product PAS 5193 sold by the Hoechst company (which are described and prepared in documents FR-2 416 723, US patent No. 2 798 053, and US patent No. 2 923 692).

[0238] (vi) Polysaccharides are, for example, selected from glucans, modified and unmodified starches (such as those derived, for example, from cereals, e.g. wheat, maize or rice, vegetables, e.g. yellow peas, and tubers, e.g. potatoes or cassava), amylose, amylopectin, glycogen, dextran, celluloses and their derivatives (e.g., methylcelluloses, hydroxyalkylcelluloses, ethylhydroxyethylcelluloses and carboxymethylcelluloses), mannans, xylans, lignins, arabans, galactans, galacturonans, chitin, chitosan, glucuronoxylans, arabinoxylans, xyloglucans, glucomannans, pectic acids, and pectins, alginic acid and alginates, arabinogalactans, carrageenans, agars, glycosaminoglucans, gum arabic, tragacanth gum, ghatti gum, karaya gum, carob gum, galactomannans, such as guar gum, and their non-ionic derivatives (e.g., hydroxypropyl guar), and xanthan gums, and mixtures thereof. .

[0239] For example, the polysaccharides that can be used are chosen from those described, for example, in "Encyclopedia of Chemical Technology", Kirk-Othmer, Third Edition, 1982, Volume 3, pp. 896-900, and Volume 15, pp. 439-458, in "Polymers in Nature" by EA MacGregor and CT Greenwood, published by John Wiley & Sons, Chapter 6, pp. 240-328, 1980, and in "Industrial Gums-Polysaccharides and their Derivatives", edited by Roy L. Whistler, Second Edition, published by Academie Press Inc.

[0240] For example, starches, guar gums, celluloses and their derivatives can be used.

[0241] Among the starches that can be used, one can cite, for example, macromolecules in the form of polymers comprising basic units that are anhydroglucose units. The number of these units and their arrangement allow one to distinguish amylose (a linear polymer) from amylopectin (a branched polymer). The relative proportions of amylose and amylopectin, as well as their degree of polymerization, can vary depending on the botanical origin of the starches.

[0242] The starch molecules used may have as their botanical origin cereals or tubers. Thus, the starches may be chosen, for example, from corn, rice, cassava, tapioca, barley, potato, wheat, sorghum and pea starches.

[0243] Starches generally exist in the form of a white powder, insoluble in cold water, with an elementary particle size ranging from 3 to 100 microns.

[0244] Starches may optionally be hydroxyalkylated at Ci-C6 or alkylated at Ci-C6 (such as acetylated). Starches may also have undergone heat treatments.

[0245] Distarch phosphates or compounds rich in distarch phosphate, such as the product supplied under the references PREJEL VA-70-T AGGL (hydroxypropyl gelatinized cassava distarch phosphate) or PREJEL TK1 (gelatinized cassava phosphate) or PREJEL 200 (acetylated cassava phosphate) by the company AVEBE, may also be used.

[0246] Guar gums may or may not be modified.

[0247] Unmodified guar gums include, for example, products marketed under the name Vidogum GH 175 by Unipectine and under the names Meypro-Guar 50 and Jaguar C by Meyhall.

[0248] Modified non-ionic guar gums are, for example, modified by Cr C6 hydroxyalkyl groups.

[0249] Among the hydroxyalkyl groups that may be mentioned, for example, are the hydroxymethyl, hydroxyethyl, hydroxypropyl and hydroxybutyl groups.

[0250] These guar gums are well known in the prior art and can be prepared, for example, by reacting corresponding alkene oxides, such as propylene oxides, with guar gum so as to obtain a guar gum modified by hydroxypropyl groups.

[0251] The degree of hydroxyalkylation, which corresponds to the number of alkylene oxide molecules consumed by the number of free hydroxyl functions present on the guar gum, can, for example, range from 0.4 to 1.2.

[0252] These non-ionic guar gums optionally modified with hydroxyalkyl groups are sold, for example, under the trade names Jaguar HP8, Jaguar HP60 and Jaguar HP120, Jaguar DC 293 and Jaguar HP 105 by the company Rhodia Chimie (Meyhall) or under the name Galactasol 4H4FD2 by the company Aqualon.

[0253] Among the celluloses and cellulose derivatives used, such as cellulose modified by hydroxylalkyl groups, are, for example, hydroxypropylmethylcellulose, hydroxyethylcellulose, and hydroxypropylcellulose, as well as hydrophobic hydroxypropylmethylcellulose. Reference may be made to the products sold under the names Klucel EF, Klucel H, Klucel LHF, Klucel MF, and Klucel G by the company Aqualon.

[0254] (vii) Fatty alcohols used as thickeners do not contain polyoxyalkylated groups and are, for example, selected from myristyl alcohol, cetyl alcohol, stearyl alcohol and behenyl alcohol.

[0255] The thickener (e) can be chosen from polymer thickeners, preferably associative polymer thickeners, and more preferably anionic associative polymer thickeners.

[0256] The thickener (e) may be a copolymer of sodium acrylamide / acryloyldimethyltaurate, a carbomer, a xanthan gum and mixtures thereof.

[0257] The amount of the thickener(s) (e) in the sunscreen composition may be 0.01% by weight or more, preferably 0.05% by weight or more, and more preferably 0.1% by weight or more, relative to the total weight of the composition.

[0258] Furthermore, the quantity of the thickener(s) (e) in the sunscreen composition may be 10% by weight or less, preferably 5% by weight or less, and more preferably 1% by weight or less, relative to the total weight of the composition.

[0259] The quantity of the thickener(s) (e) in the sunscreen composition may range from 0.01% to 10% by weight, preferably from 0.05% to 5% by weight, more preferably from 0.1% to 1% by weight, relative to the total weight of the composition. (Other ingredients)

[0260] The composition of sunscreen may also include at least one optional or additional ingredient.

[0261] The optional or additional ingredient(s) may be selected from the group consisting of anionic, non-ionic or amphoteric polymers other than the thickener (e); plant extracts; acidifying agents; alkalizing agents; a colouring agent such as pigments and colours; vitamins or provitamins; perfumes; preservatives, co-preservatives, stabilizers and mixtures thereof.

[0262] The quantity of the optional ingredient or ingredients) or additional ingredient(s) is not limited, but may be from 0.01% to 30% by weight, preferably from 0.1% to 20% by weight, and more preferably from 1% to 10% by weight, relative to the total weight of the composition according to the present invention. (Preparation)

[0263] The sunscreen composition can be prepared by mixing, for example, the ingredient or ingredients as explained above, and any other optional or additional ingredient, if applicable, as explained above.

[0264] The process and means for mixing the above ingredients are not limited. Any conventional processes and means may be used to mix the above ingredients to prepare the sunscreen composition. (Form)

[0265] The sunscreen composition may be of the H / W or W / H type, preferably of the H / W type.

[0266] It is preferable that the sunscreen composition be in the form of a cream. EXAMPLES

[0267] The present invention will be described in more detail by means of examples which, however, should not be interpreted as limiting the scope of the present invention. [Determining the amount to apply]

[0268] According to the US Skin Cancer Foundation, the minimum SPF value for daily facial protection is SPF 15. However, users of sunscreen products tend to apply an insufficient amount of sunscreen, resulting in inadequate protection against UV rays during daily use.

[0269] A study by Fujiwara et al. (Photodermatology, Photoimmunology & Photomedicine, Vol. 38, Issue 3, pp. 259-265, 2021) investigated the impact of on-site application density on the efficacy of a sunscreen product in providing a UV protection. The study revealed a correlation between the amount of sunscreen applied and its effectiveness in protecting against UV rays. Based on their results, considering an average face size of 300 cm², the minimum amount to achieve at least SPF 15 was determined to be 214.6 mg.

[0270] Furthermore, there is no limitation on the maximum quantity of a sunscreen product. Considering the quantity (maximum quantity: 2 mg / cm2) used to test sunscreen products in the ISO24444 processes (ISO24444:2019 (en): Cosmetics - Sun protection test methods - In vivo determination of the sun protection factor (SPF)), for a face size of 300 cm2 on average, the maximum quantity was determined to be 600 mg. [Determination of the sample]

[0271] 9 panelists participated in determining the sample.

[0272] They were asked to deposit onto a sheet of paper a sunscreen product, the formulation of which is indicated in Table 1 below, from a nozzle tube containing it, in an amount of the "size of a pearl" (typical instructions for conventional sunscreens) without any other specific instruction.

[0273] On the other hand, they were asked to apply a deposit from the same tube containing the same sunscreen product onto a sheet of paper in accordance with a spiral movement of the nozzle. In other words, during pressing, the tube was moved so that the nozzle made a spiral movement from the center to the periphery, without leaving any space between the lines of the sunscreen product, as illustrated in [Fig. 1].

[0274] They were asked to try to deposit the same amount of sunscreen product.

[0275] In both cases, the amount of solar product deposited was measured using a precision scale.

[0276] Sampling the “pearl size” without additional specific instructions resulted in an average quantity of 0.26 g with a standard deviation of 0.093, with only 1 panelist reaching more than 0.3 g, while sampling with a spiral motion resulted in an average quantity of 0.39 g with a standard deviation of 0.21, with 5 panelists reaching 0.3 g.

[0277] It was discovered that picking up with a spiral motion could lead to a higher quantity of a sunscreen product. [Determination of application pressure]

[0278] The application pressure for step (3) in the cosmetic process according to the present invention was determined with a HapLog system (Haptic skill logger, Tec Gihan Co., Ltd.).

[0279] When using the HapLog system described above, a sensor is placed on a fingernail. When the fingertip is pressed against a measuring surface of the system, the sides of the finger deform according to the pressure applied to the measuring surface. This system transforms the finger deformation into a load value by measuring the pressure applied by the finger.

[0280] 10 women, forming the panel, participated in measuring application pressure.

[0281] The sensor of a HapLog system was placed on the tip of each index finger panelist. Each panelist was asked to perform the self-application simulation on their cheek, and the pressure during the simulated self-application was recorded. The pressure on the skin was quantified as the average of the 100 highest values.

[0282] Next, the HapLog system was removed from the finger and each panelist received 300 mg of a sunscreen product whose formulation is indicated in Table 1 to apply to their entire face. They applied the product by controlling the number of strokes and the direction of the movements, but with their usual application pressure.

[0283] After application, an image of their face was acquired using a VISIA® Evolution system (Canfield Scientific) in UV light mode. This system takes images of a face with information on the fluorescence of the facial skin. The higher the amount of sunscreen product, the greater the absorption of UV light, resulting in lower fluorescence.

[0284] The image was analyzed using ImageJ software (W. Rasband, NIH) to quantify the fluorescence intensity in a 600 x 600 pixel Area of ​​Interest on the cheek. Data were extracted only from the dominant hand side of the face.

[0285] Consequently, finger pressure (N) and fluorescence intensity were correlated with a coefficient of r = 0.734.

[0286] Therefore, the higher the pressure, the less sunscreen product remained on the face.

[0287] On the other hand, when panelists were asked to simulate a "light" gesture, such as touching sand without moving the surface of the sand, the maximum pressure was 1.5 N, usually around 1 N. Thus, the "light" application pressure was determined to be 1.5 N at most.

[0288] On the other hand, the lowest level was set at 0.2 N when the hand is practically not touching the skin. [Example 1 and Comparative Example 1]

[0289] 6 panelists joined together to carry out the cosmetic process for example 1 and comparative example 1. (Example 1)

[0290] A tube with a nozzle and containing a sunscreen product whose formulation is indicated in Table 1 below was squeezed to dispense the sunscreen product from the nozzle onto the skin on the back of one hand of each panelist. The amount of sunscreen product was 0.3 g or more.

[0291] Next, the sunscreen product was divided and placed on the center of the forehead, the two cheek areas near the nose, the center of the nose and the center of the chin on the face of each panelist.

[0292] Next, the sunscreen product at the five locations was spread on the face with three or four fingers, spreading from the center outwards. The spreading was done gently, so that the pressure on the sunscreen product was less than 1.5 N. For three-dimensional facial features, such as the nostrils and eyelids, a single finger was used with the same pressure.

[0293] After applying the sunscreen, the face was patted with 3 to 4 fingers to obtain an even film of the sunscreen. For three-dimensional facial features, such as the nostrils and eyelids, only one finger was used for patting.

[0294] Finally, the face was pressed with the palms of two hands on each side of the face to make the film adhere to the skin and / or to confirm the uniformity of the appearance of the face. (Comparative example 1)

[0295] A tube with a nozzle and containing a sunscreen product whose formulation is indicated in Table 1 below was squeezed to dispense the sunscreen product from the nozzle onto the skin on the back of one hand of each panelist, without any instructions. The amount of sunscreen product was 0.3 g or more.

[0296] They applied the sunscreen product to their face without any instructions. (Assessment)

[0297] After application, an image of their face was acquired using a VISIA® Evolution system (Canfield Scientific) in UV light mode. Measurements were taken on bare skin before the test and immediately after application.

[0298] The homogeneity of the film formed by the sunscreen product was assessed qualitatively by checking the homogeneity of UV absorption of the face.

[0299] As a result, it was discovered that the cosmetic process carried out in Example 1 increased the homogeneity of the film compared to the cosmetic process carried out in Comparative Example 1.

[0300] (Sunscreen product)

[0301] [Table 1] Table 1 Quantity (% by weight) Stearic Acid 2.00 Dipropylene Glycol 2.11 Glyceryl Stearate (and) PEG-100 Stearate 1.50 Ethylhexyl Methoxycinnamate 6.75 Nylon-12 1.00 Glycerin 4.00 Potassium Cetyl Phosphate 1.00 Carbomer 0.30 Titanium Dioxide 5.00 Ethylhexyltriazone 0.50 Terephthalylidene Dicamphor Sulfonic Acid 12.00 Cetyl Alcohol 0.70 Drometrizole Trisiloxane 4.00 Acrylamide / Sodium Acryloyldimethyl Taurate Copolymer (and) Isohexadecane (and) Polysorbate 80 0.50 Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine 0.50 Sodium Cocoyl Sarcosinate 1.00 Diethylaminohydroxybenzoyl Hexyl Benzoate 0.50 Water qsp 100

Claims

Demands

1. A cosmetic, non-therapeutic method for applying a sunscreen composition to a face, comprising the following steps: (1) supplying a sunscreen composition in an amount of 0.3 g or more; (2) placing the sunscreen composition on at least three points on the face with at least one finger, wherein the at least three points include any one of the center of the forehead, the cheeks, and the center of the chin; (3) spreading the sunscreen composition from the center to the periphery of the face with at least three fingers, applying a pressure of 1.5 N or less; and (4) patting the face with at least three fingers to obtain a film of the sunscreen composition on the face.

2. A cosmetic process according to claim 1, wherein the amount of the sunscreen composition supplied in step (1) is greater than 0.3 g, preferably 0.4 g or more, and more preferably 0.5 g or more, and less than 0.6 g.

3. A cosmetic process according to claim 1 or 2, wherein the sunscreen composition is placed on the back or palm of a hand, in step (1), in the form of a line to form a spiral shape, to provide 0.3 g or more of the sunscreen composition.

4. A cosmetic process according to claim 3, wherein the sunscreen composition is placed on the back or palm of a hand, in step (1), in the form of a line to form a spiral-shaped wrap two or three times, to provide 0.3 g or more of the sunscreen composition.

5. A cosmetic process according to any one of claims 1 to 4, wherein the sunscreen composition is placed, in step (2), on at least four points, preferably five points on the face, the at least four points comprising any one of the center of the forehead, the cheeks, the center of the nose and the center of the chin.

6. A cosmetic process according to any one of claims 1 to 5, wherein pressure is applied in step (3) with at least three bent fingers.

7. A cosmetic process according to any one of claims 1 to 6, wherein the sunscreen composition is applied, in step (3), with at least one applicator.

8. A cosmetic method according to any one of claims 1 to 7, further comprising a step of spreading the sunscreen composition on the nose and eyelids of the face with at least one finger, preferably applying a pressure of 1.5 N or less, after step (3).

9. A cosmetic process according to any one of claims 1 to 8, further comprising a step (5) of pressing the face with the hands.

10. A cosmetic method according to claim 9, wherein at least the cheeks of the face are pressed simultaneously in step (5).

Images