JPH02184618A - Ir reflective transparent cosmetic composition - Google Patents

Abstract

PURPOSE: To obtain a composition which can reflects infrared rays by at least one kind of substance selected from among diatomaceous earth, microfine hollow glass ball, bismuth oxychloride or zirconium-coated ceramic fine particle having a smaller particle size that a certain level respectively and has a light transmission in the visible range. CONSTITUTION: In a cosmetic vehicle, an infrared ray-reflecting substance selected from among diatomaceous earth having particle size of <=100μm, particularly <=80μm, microfine hollow glass ball particularly of <=80μm particle size, bismuth oxychloride of <=75μm, particularly <=40μm particle size or zirconium- coated ceramic fine particle of <=8μm particle size is added. The objective clarified cosmetic composition contains the substance so that the reflectance of the infrared ray becomes 45%, the dispersion of this substance in a petroleum jelly has at least 85% light transmission in the visible wavelength region and is suitable for protecting skin from infrared rays. This composition has high adhesion to skin with high chemical stability.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to cosmetic compositions containing infrared reflective substances and their use in protecting the human cortex against infrared radiation.

[Conventional technology]

It is known that ultraviolet rays play an important role in not only tanning the human epidermis but also aging the skin. In particular, the wavelength is 280~
It is known that UV-B11, which causes erythema at 320 nm, is the main cause of photocarcinogenesis. It has also recently been shown that UV-A radiation at wavelengths 32 (1-400 na+), which causes skin tanning, augments the harmful effects of UV-B (J.

1fillis, ^, Kligman & J, E
pstein, The Journal of Inv.
esLigative Der+maLology,
59. No, 6. p.

416(19]3)].

However, the solar radiation that reaches the earth's surface also has a wavelength of 40%.
It also contains some important radiation, ie infrared radiation, from 60 to 2,500 n-.

Exposure of the human cortex to infrared radiation is therefore not only closely related to natural exposure to the sun, but also in hair salons for drying hair, similar to burning books for warmth. It can also occur due to the infrared lamp used.

Lorraine H., Kligman (L.), University of Pennsylvania, USA
Orraina Il, Kligman) The Journalor Arch, Derma
Lol, Res, 272. pp, 229-238
A recent study published in (1982) found that infrared light, while physiologically pleasant, is not unnecessary, and by itself induces elastosis (elastosis) in the upper dermis.
It has been shown that this results in a dense proliferation of fine elastic II fibers resembling fluff, called fibrosis (lastosis), and hypertrophy of the fibers, which can induce cancer.

Furthermore, infrared rays cause vasodilation and increase in skin temperature,
Sunburn results in skin erythema, defined as "erythema" in the article by L.H. Kligman.

It has therefore been found useful to reflect infrared radiation to reduce its harmful erythema on the human cortex.

The natural radiation-reflecting properties of opaque pigments are known. Such pigments include metal salts and oxide powders such as titanium dioxide and zinc oxide powders.

However, the use of reflective agents consisting of metal salts and oxide powders in cosmetic compositions for protecting the human cortex has the disadvantage of forming an unattractive white film on the skin.

Therefore, much research has been devoted to obtaining cosmetic protective coatings that, when incorporated into cosmetic compositions, satisfactorily reflect potentially harmful infrared rays and do not leave a white film on the skin that is disliked by the user. Efforts have been made to discover new substances that make both possible. Furthermore, such compositions
In addition to not having a sticky feel and adhering well to the skin,
It must exhibit good chemical and photochemical stability.

According to the invention, a substance comprising a substance dispersible in the cosmetic medium used, having an infrared reflectance (R) of at least 45%, preferably 55%, dispersed in a petroleum jelly at a concentration of 2%. at least 85%, preferably less (
Both have a light transmittance of 90% in the visible region,
It has surprisingly been found that it reflects infrared radiation while imparting the desired advantageous properties mentioned above to cosmetic compositions containing it. In particular, they exhibit transparency on the human cortex, good adhesion to the skin, good chemical and photochemical stability, as well as attenuation of the "sunburn" erythema caused by infrared radiation.

The present invention therefore provides a cosmetic composition suitable for the protection of the human cortex from infrared radiation, comprising 100 diatoms having a particle size of less than 100 μm in a cosmetically acceptable vehicle.
Contains at least one type of infrared reflective material consisting of hollow glass microspheres with a particle size of μ shoulder or less, bismuth oxychloride with a particle size of 75 μm or less, or zirconium-coated ceramic fine particles with a particle size of 8 μm or less provided that the substance has an infrared reflectance (R) equal to at least 45% and that a dispersion of said substance in petroleum jelly at a concentration of 2% reflects at least 85% of the visible range of light. Provides a cosmetic composition with transmittance. Generally preferred particle sizes are 80 μm or less for diatoms, 80 μm or less for hollow glass microspheres, and 40 μm or less for bismuth oxychloride.
The thickness of the zirconium-coated ceramic fine particles is 8μ or less.

The invention further provides for use in a method for protecting the human cortex against infrared radiation, comprising applying to the skin a sufficient amount of a composition comprising at least one infrared reflective substance as defined above. Give the composition. Moreover, the present invention
It is also provided that the composition comprising at least one infrared reflective substance defined in the protection of the human cortex against infrared radiation is used as a cosmetic product.

Infrared reflective materials particularly suitable for use in accordance with the present invention include those manufactured under the name "CLAR3EL DI C/B".
duits Cbimiqeset Pharmace
"Glass Hicrosphere" is a ``Glass Hicrosphere'' with a particle size of 5 to 80 μm sold by Utiquea.
s) 7 sold by 3M under the name "E22X"
Hollow glass microspheres with a layer of less than 5 μl, bismuth oxychloride with an average particle size of 6 to 15 μl, sold by MALLI NCKRODT under the name “PEARL GLO”;
and “TOFtAYCIli:RAM”
Zirconium-coated ceramic fine particles with a particle size of 4 to 5 μl sold by Toshisha under the name of
000″ is included.

The greater the reflectance (R) of an infrared reflective material, the more effective it is.

Reflectance is the ratio of the intensity of reflected light to the intensity of incident light. This measurement is based on “Infra Alisale (1lfr@-
1 using a device known as
．． It is carried out in the wavelength range of 100 to 2.500 nm.

The light transmittance in the visible region of a reflective substance dispersed in petroleum jelly at a concentration of 2% is determined by the spectroscopy with an integrating rotor in the wavelength range of 400 to 700 nm using a thin layer of about 10μ. measured by a meter.

Light transmittance is the ratio of the intensity of transmitted light to the incident light.

The infrared reflective substance according to the invention is present in the cosmetic composition in a proportion of 0.5 to 20% by weight, for example 1 to 10% by weight, especially 1 to 3% by weight, based on the total weight of the composition. exists in

Cosmetic compositions according to the invention may also contain UV-screening agents that are well known in the art and are compatible with the infrared-reflecting substances used according to the invention; these UV-screening agents include lipid Soluble or water-soluble UV-A, U
It can be a V-B or broadband screening agent.

Suitably such substances are present in the cosmetic composition according to the invention in a proportion of 0.5 to 20% by weight, based on the total weight of the composition.

The following compounds are suitable for use in the compositions of the present invention.
Examples of screening agents are p-aminobenzoic acid, its esters and derivatives such as: ethyl N, N-dihydroxy 10-pyl-p-aminobenzoate ethyl N-epoxy-p-aminobenzoate ethyl p
-dimethylaminobenzoate amyl p-dimethylaminobenzoate glyceryl p-aminobenzoate butyl p-dimethylaminobenzoate 2-ethylhexyl p-dimethylaminobenzoate Primary salicylates: potassium or triethanolamine salicylate amyl salicylate menthyl salicylate homo Menthyl salicylate 2-Ethylhexyl salicylate Phenyl salicylate Benzyl salicylate p-Isopropanol Phenyl salicylate Isodecyl salicylate - Homomenthyl N- Acetyl anthraniley - 1 - The following cinnamates and silicon Namic acid derivatives: Potassium cinnamate ethyl 4-isopropyl cinnamate 2,4-diisopropyl cinnamate methyl
2,4-Diisopropylcinnamate p-methoxycinnamic acid and its salts Propyl p-methoxycinnamate Isoprobyl p-methoxycinnamate Isoamyl p-
Methoxycinnamate 2-ethylhexyl p-methoxycinnamate 2-ethoxyethyl p-methoxycinnamate cyclohexyl p
-Methoxycinnamate Ethyl α-cyano-β-phenylcinnamate 2-Ethylhexyl α-cyano-β-phenylcinnamate Primary benzophenones: 2.4-dihydroxybenzophenone 2.2'-dihydroxy-4-methoxybenzophenone 2.2 '-Dihydroxy-484'-dimethoxybensiphenone 2.2'-dihydroxy-4,4'-dimethoxybenzophenone-5-sulfonic acid and its salts 2.2', 4.4
'-Tetrahydroxybenzophenone 2-hydroxy-4-methoxybenzophenone 2-droxy-4-methoxy-4'-methylbenzophenone 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid and its salts 4-phenylbenzophenone 2-ethylhexyl 4'-phenylbenzophenone-2
-carboxylate 2-droxy-4-n-octyloxybenzophenone 4-hydroxy-3-benzophenonecarboxylic acid and its salts -2-phenylbenzimidazole-5-sulfonic acid and its salts monourocanic acid and in situ-ethyl Rocanate-2-phenyl-5-methylbenzoxazole-2-
(2'-Hydroxy-5'-methylphenyl)benzotriazole-2-(2'-hydroxy-5'-t-octylphenyl)benzotriazole monosodium 3.4-dimethoxyphenylglyoxylate-dibenzalazine-diani Soilmethane-4-isopropyldibenzoylmethane-4-(-butyl-4'-methoxydibenzoylmethane-3-benzylidene-41-camphor-3-(4'-
methylbenzylidene)-,11-camphor-3-(4'-sulfobenzylidene) camphoric acid and its salts (French Patent No. 2,282,426) -3-
(3″-Sulfo-4′-methylbenzylidene) camphoric acid and its salts (French Patent No. 2,236,515) -4-(2-oxo-3-bornylidenemethyl)phenyltrimethylammonium methylsulfate (French Patent No. 2,236,515) Patent No. 2,199,911) -Methyleugenol-guanine-digalloyltrioleate-5-(3,3-dimethyl-2-norbornylidene)-
3-penten-2-one-benzene-1,4-bis(3-menalidene)-10-
Camphor sulfonic acid and its salts (French Patent Co., Ltd. 2.
528,420) -N-(2-ethylhexyl)-4-(3'-methylidenesidium)benzenesulfonamide (French Patent No. 2,529,887) -N-(2-ethylhexyl)-3- [(3°-methoxy-4'-n-butoxy)benzylidene]-10-camphorsulfonamide (French Patent No. 2,529,8
No. 87) -N-(2-ethylhexyl)-3-benzylidene-10-camphorsulfonamide (French Patent No. 2.529,887) -3-[4'-(acrylamidomethyl) with MW less than 20,000 benzylidene]-J2-homopolymer of camphor (French Patent No. 2,601,365)-
Copolymer of 2-[(2'-hydroxy-5'-t-octyl)phenyl]-28-benzotriazole and butyl vinyl ether (French Patent No. 2,601,365)
The cosmetic composition according to the invention may be presented in the form of a suspension or dispersion in one or more solvents or fats, in the form of an emulsion such as a cream, emulsion, or in the form of an ointment, gel or solid stick. is suitable, or spray (aer) is suitable.
osol) or provided in foam form.

Cosmetic auxiliaries may be included in sequestrants, antioxidants, antifoams, oils, waxes, lanolin, fragrances, propellants, colorants, vitamins or other ingredients conventionally used in cosmetics. can.

When the composition is packaged as a spray, conventional propellants such as alkanes, fluoroalkanes and chlorofluoroalkanes are used.

The main auxiliaries present in the cosmetic compositions of the invention are suitably solvents such as water or lower-hydric alcohols or polyols having 1 to 6 carbon atoms or mixtures thereof, particularly preferably monohydric alcohols or Polyols are ethanol, isopropanol, propylene glycol, glycerin and sorbitol. fats such as mineral, animal, vegetable or synthetic oils or waxes, fatty acids, fatty acid esters such as triglycerides of fatty acids having 6 to 12 carbon atoms, fatty alcohols, petroleum jelly paraffins,
Also suitable are lanolin, hydrogenated lanolin 1, acetylated lanolin and silicone oils.

One embodiment of the invention provides a cream or emulsion comprising, in addition to the infrared reflector, fatty alcohols, fatty acid esters, in particular fatty acid triglycerides, fatty acids, lanolin and derivatives thereof, natural or synthetic oils or waxes and emulsifiers in the presence of water. It consists of an emulsion in the form of

Water-in-oil emulsions are one preferred embodiment.

Emulsions of this type consist of an aqueous phase, a fatty phase and an emulsifying system.

The concentration of the emulsifying system in emulsions of this type is 4-35%, based on the total weight of the emulsion, and the fatty phase is present in a proportion of 20-70%, based on the total weight of the emulsion. The emulsifying agent is the emulsifying agent conventionally used in emulsions of this type. Suitable examples include: fatty acid (CI2-C4) esters of sorbitan; hydroxystearic acid and fatty alcohols (0,2-C3°)
esters of monofatty acids (C1, to C8,) and glycerol or polyglycerols; condensates of ethylene oxide and propylene glycol; monooxypropylenated/oxyethylenated fatty alcohols (CI2 to C2°); sterols polycyclic alcohols such as nylanolin; mixtures of oxypropylenated/polyglycerolated alcohols with magnesium isodithiaphosphate; succinic acid esters of monopolyoxyethylenated or polyoxypropylenated fatty alcohols; and - mixtures of magnesium ralt, calcium ralt, lithium ralt, zinc ralt or aluminum ralt and lanolin alcohol or hydrogenated lanolin.

Examples of fatty products forming the fatty phase of the emulsion include: paraffin oil, purcellin oil, solutions of perhydrosqualene and microcrystalline wax in oil, sweet almond oil, avocado oil, calophyllum oil, lanolin and its derivatives, castor oil, kavaline oil, pork oil, sesame oil, olive oil, jojoba oil, x-(5he
a) Oil, Iioplostethus
) animal or vegetable oils, such as oils, whose initial distillation point at one atmospheric pressure is approximately 250°C and whose final point is 41°C.
Mineral oil such as liquid paraffin, alkyl myristates such as isopropyl, butyl or cetyl myristate, hexadecyl stearate, ethyl or isopropyl palmitate, triglycerides of octanoic and decanonic acids and cetyl lysyl ate, at about 0°C. saturated or unsaturated fatty acid esters, such as saturated or unsaturated fatty acid esters, the fatty phase suitably also contains silicone oils soluble in other oils, such as dimethylborisiloxic acid, methylphenylborosiloxic acid and silicone/glycol copolymers, fatty acids and fatty alcohols. There is.

Carnauba wax, candelilla wax,
Beeswax, microcrystalline wax, osikelite and Ca, Mg
Waxes such as oleate, myristate, linoleate and stearate of A1 and A1 can also be used.

Water-in-oil emulsions may also be provided in the form of sunscreen sticks, in which case the concentration of the aqueous phase in the emulsion is generally between 5 and 7, based on the total weight of the emulsion.
It is 0% by weight.

-m, these water-in-oil emulsions are manufactured as follows. Introducing the fat phase and emulsifier into the production tank. Heat the mixture to a temperature of ~75°C. Next, add the oil-soluble ingredients, and then add the water-soluble ingredients in water that has been previously brought to the same temperature. Add while stirring. Stir until an emulsion with the desired smoothness is obtained, then cool to room temperature, optionally with slow stirring.

Fatty gels are oil-based or hydroalcoholic, containing thickening agents such as oils or waxes and silica; gels are made of one or more alcohols or polyols, such as ethanol, propylene glycol or glycerin, in the presence of oil or water, respectively; Contains thickening agents such as silica, cellulose derivatives, polyacrylic acid derivatives, guar gum, lilac gum, and xanthan gum.

Solid sticks contain natural or synthetic waxes and oils, fatty alcohols, fatty acid esters, and fats such as lanolin.

The following examples further illustrate the invention.

Implementation PA1 A transparent cream for protecting the human cortex was prepared in the form of a water-in-oil emulsion with the following composition: 2-octyl-1-dodecanol 10 g Magnesium stearate 4 #beeswax
5g hydrogenated lanolin
1fI lanolin
“ARLACEL 83” from 4g101 company
Sorbitan sesquioleae (sold under the name ``Sorbitan Sesquioleae'')
4.5° Mixture of glycerol mono- and di-stearate and potassium stearate 1° Liquid paraffin
27# Diatom 2g Sutton Lapus (sold by SOBREP under the name “CLAR3EL DIC/B”)
“Jermall (G)” from SUTTON Labs
Imidazolidinyl urea derivative sold under the name "ERMALL) 115" 0.2
J fragrance, 3 water
qsloooi
This cream is prepared by dispersing infrared reflectors in fat and emulsifiers according to conventional methods of making emulsions.
Heat this fatty phase to about 70-75 °C and add water with strong stirring, heat to the same <70-75 °C and reduce stirring to 1
It lasted 0-15 minutes, then the mixture was cooled with gentle stirring and the flavor and preservative were added at about 40'C.

Example 2 As in Example 1, a clear cream for protecting the human cortex was prepared in the form of a water-in-oil emulsion with the following composition:

2-octyl-1-dodecanol 10
.

Magnesium stearate 4g beeswax
5.

Hydrogenated lanolin 1y lanolin 41 Nrubitan sesquioleate sold by ICI under the name "Aracel 83" 4.5° Mixture of glycerol mono- and di-stearate and potassium stearate
1g liquid paraffin 27 9
Hollow glass microspheres sold by 3M Company under the name "Glass Microspheres E22X" 2g Imidazolishell urea derivative sold by Sutton Lapus Company under the name "Germol 115" 0.2° fragrance, S water
qs 100
g Implementation IM3 A transparent cream for protecting the human cortex was prepared in the form of a water-in-oil emulsion with the following composition: 2-octyl-1-
Dodecanol 10 f Magnesium stearate 4 g Beeswax
5g hydrogenated lanolin
1g lahan 4
#Sorbitan sesquioleate sold under the name "Aracel 83" by IC1 4.5t Mixture of glycerol mono- and di-stearate and potassium stearate 1g liquid paraffin
27g Toray Serum ZP550 from Toshisha
Ceramic fine particles coated with zirconium powder sold under the name 23. Imidazolidinyl urea derivative sold under the name "Germol 115" by Sutton Lapus Co. 0.
2゜Fragrance Qs water
qs 1
00 g Example 4 A transparent cream for protecting the human cortex was prepared in the form of a water-in-oil emulsion with the following composition: 2-octyl-1-
Dodecanol 10T Magnesium Stearate 4I Beeswax
5g hydrogenated lanolin
1g lahan 4.

Sorbitan sesquioleate sold under the name "Aracel 83" by IC1 4.5 g mixture of glycerol mono- and di-stearate and potassium stearate 1 g liquid paraffin
27 g “Pearl GLO” from Mallinckrodt
Bismuth oxychloride sold under the name 2g imidazolyshell urea derivative sold under the name "Jermol 115" by Sutton Lapus
0.2゜Fragrance qs Water qs
100y Example 5 A transparent cream for protecting the human cortex was prepared in the form of a water-in-oil emulsion with the following composition:
Mixture of heptyl/stearyl alcohol sold under the name INN0WAX)AO' and 33 moles of oxidized ethylene cross-oxyethylenated cetyl/stearyl alcohol Fuji mono- and di-stearate 2g heptyl alcohol 1.52 silicone oil
1.5g liquid paraffin
15g French Patent No. 2,19
No. 9,971, Example 1 of 4-(
2-oxo-3-bornylidenemethyl)phenyltrimethylammonium methyl sulfate 2g Sodium lactate 1g Ceramic fine particles coated with zirconium powder sold by Toshisha under the name "Toray Ceram Z P 55G" 2g Glycerin 20g Preservative agents, fragrances
qs water
qs 100 g "Torei Serum ZP550" was dispersed in the fatty phase containing emulsifier.

The aqueous phase containing water, glycerin, sodium lactate and 4-(2-oxo-3-bornylidenemethyl)phenyltrimethylammonium methylsulfate-1.
heated to ℃.

The fat phase, previously heated to 70-75°C, was added to the aqueous phase with vigorous stirring, then the mixture was left to cool with gentle stirring, and at about 40°C the flavor and preservative were added.

Example 6 A transparent gel on the skin was prepared with the following composition: Diatom 2g 2-hydroxy- sold under the name "Clasel DI C/B" by Sobrep.
4-Methoxybenzophenone-5-sulfonic acid (BA
S F UV I NUL MS40) 0
．． 5 g crosslinked polyacrylic acid with a MW of 4,000,000, sold under the name "CARBOPOL 940" by Gutdrich 0.3 g propylene glycol 3G.

Triethanolamine 0.911 Sequestering agent, preservative, fragrance qs water
qsloo #Example 7 A clear cream was prepared in the form of a water-in-oil emulsion with the following composition: Cetyl/stearyl alcohol sold under the name "Zinowax AO" by Henkel and 33 moles of ethylene oxide. Oxyethylated heptyl/ste

Claims (18)

[Claims] (1) 100μ in a cosmetically acceptable vehicle.
at least one type consisting of diatoms having a particle size of not more than m, hollow glass microspheres having a particle size of not more than 100 μm, bismuth oxychloride having a particle size of not more than 75 μm, or zirconium-coated ceramic fine particles having a particle size of not more than 8 μm. containing an infrared reflective material, provided that the material has an infrared reflectance (R) equal to at least 45%.
A composition suitable for protecting the human cortex against infrared radiation, having a 2% concentration of said substance dispersed in petroleum jelly and having a light transmission in the visible range of at least 85%. (2) The composition according to claim 1, wherein the diatom has a particle size of 80 μm or less. (3) The particle size of the hollow glass microspheres is 80 μm or less,
The composition according to claim 1 or 2. (4) The composition according to any one of claims 1 to 3, wherein the particle size of bismuth oxychloride is 40 μm or less. (5) The infrared reflective material has an infrared reflectance (R) of at least 55% and the dispersion at a concentration of 2% in petroleum jelly has a light transmittance in the visible range of at least 90%. 4. The composition according to any one of 4. (6) Infrared reflective substances include diatoms with a particle size of 5 to 80 μm, hollow glass microspheres with a particle size of 75 μm or less, 6 to
Bismuth oxychloride with an average particle size of 15 μm, or 4-5
Composition according to any one of claims 1 to 5, consisting of zirconium-coated ceramic microparticles having a particle size of .mu.m. (7) The composition according to any one of claims 1 to 6, comprising an infrared reflective substance in an amount of 0.5 to 20% based on the total weight of the composition. 8. The composition of claim 7, comprising an infrared reflective material in an amount of 1 to 10% by weight, based on the total weight of the composition. 9. The composition of claim 8, comprising an infrared reflective material in an amount of 1 to 3% by weight, based on the total weight of the composition. (10) Claims 1 to 9 containing at least one type of ultraviolet screening agent consisting of lipid-soluble or water-soluble UV-A or UV-B, or a broadband screening agent compatible with an infrared reflective substance.
The composition according to any one of the above. (11) The composition according to claim 10, comprising 0.5 to 20% by weight of a UV screening agent, based on the total weight of the composition. (12) The ultraviolet shielding agent is p-aminobenzoic acid or its ester or derivative, salicylate, cinnamate, or cinnamic acid derivative, benzophenone, 2-phenylbenzimidazole-5-sulfonic acid or its salt, urocanic acid or its salt. , ethyl urocanate, 2-phenyl-
5-methylbenzoxazole, 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, 2-
(2'-hydroxy-5'-t-octylphenyl)benzotriazole, sodium 3,4-dimethoxyphenyl-glyoxylate, dibenzalazine, dianisoylmethane, 4-isopropyl-dibenzoylmethane,
4-tert-butyl-4'-methoxydibenzoyl-methane, 3-benzylidene-dl-camphor and its derivatives, methyleugenol, guanine, digalloyltrioleate, 5-(3,3-dimethyl-2-norbornylidene)- 3-penten-2-one, M up to 20,000
Homopolymer of 3-[3'-(acrylamidomethyl)benzylidene]-dl-camphor of W, or 2-[(2
'-Hydroxy-5'-t-octyl)phenyl]-2
The composition according to claim 10 or 11, which is a copolymer of H-benzotriazole and butyl vinyl ether. (13) In the form of a suspension or dispersion in a solvent or fat, in the form of an emulsion, cream, emulsion, or ointment, gel or solid stick, or packaged as a spray. The composition according to any one of the above. (14) Thickeners, cortico softeners, cortical humectants, surfactants, preservatives, sequestering agents, antioxidants, antifoaming agents, oils, waxes, lanolin or derivatives thereof, fragrances, propellants, colorants, or 14. A composition according to any one of claims 1 to 13, which is a vitamin. (15) in the form of a water-in-oil emulsion comprising, in the presence of water, at least one of fatty alcohols, fatty acid esters, fatty acids, lanolin or derivatives thereof, natural or synthetic oils or waxes, or emulsifiers; Item 15. The composition according to any one of Items 1 to 14. (16) A composition as described in any one of claims 1 to 15 and substantially the same as that described in any of Examples 1 to 7. (17) Use of the composition according to any one of claims 1 to 16 as a cosmetic product for protecting the human cortex against infrared radiation. (18) A composition according to any one of claims 1 to 16 for use in a method consisting of applying the composition to the skin for protecting the human cortex against infrared radiation.