where R is a linear or cyclic monovalent hydrocarbon group containing 1 to 30 carbon atoms, m is equal to 1 or 2 and R' is an unsaturated aliphatic hydrocarbon group containing 2 to 10 carbon atoms or an unsaturated cyclic 15 hydrocarbon group containing 5 to 8 carbon atoms; and/or

• polyorganosiloxanes comprising at least one alkylhydrogenosiloxane unit with formula:

2

where R is a linear or cyclic monovalent hydrocarbon 20 group containing 1 to 30 carbon atoms or a phenyl group and p is equal to 1 to 2; and

• thermoplastic, thermocrosslinkable,

electrocrosslinkable polymers.

The matrix crosslinking may be chemical

25 crosslinking, for example using succinimides as described in application WO 2007/082061 A2.

For photocrosslinkable matrixes requiring a photoinitiator, the photoinitiator is selected, for example, from the following list: DMPA (dimethoxy 2- 30 phenyl acetophenone) , 2-benzyl-2- (dimethylamino) -1- [4- (4- morpholino phenyl ] -1-butanone sold under the trademark Irgacure^® 369 by Ciba^®, 4 , 4 ' -bis (diethylamino) benzophenone sold by Sigma-Aldrich^®, 2-hydroxy-4 ' - (2-hydroxyethoxy) -2- methylpropiophenone sold by Sigma-Aldrich^®, 2-benzyl-2- 35 (dimethylamino) -4 ' -morpholinobutyrophenone sold by Sigma- Aldrich^®, phenylbis (2,4, 6-trimethylbenzoyl ) -phosphine oxide sold by Sigma-Aldrich^®, isopropyl-thioxanthone sold by Sigma-Aldrich^®, and camphorolactone .

The PEG diacrylates may, for example, be crosslinked using a photoinitiator such as camphorolactone.

Examples of inorganic matrixes that may be mentioned are metallic oxide matrixes, especially Si02, Ti0₂, ZrO or CaC03, or Si matrixes. Medium containing photonic particles

The photonic particles may be contained in a

cosmetically acceptable medium, i.e. a non-toxic medium suitable for application to human keratinous materials, in particular the skin, mucous membranes, or the hair or the nails.

Said medium is adapted to the nature of the support onto which the composition is to be applied and to the form in which the composition is to be packaged.

The medium may comprise a phase that is liquid at 25°C, containing photonic particles.

The medium may be selected so as to encourage dispersion of the photonic particles in the medium before application thereof, in order to prevent the photonic particles from becoming aggregated. As an example, it may be possible to use one or more agents that reduce the surface tension of the medium containing the photonic particles to less than 35 mN/m [millinewtons per meter] .

The medium may be aqueous, with the photonic

particles contained in an aqueous phase. The term

"aqueous medium" denotes a medium that is liquid at ambient temperature and atmospheric pressure and contains a large fraction of water relative to the total weight of the medium. The complementary fraction may contain or be constituted by cosmetically acceptable organic solvents, miscible with water, for example alcohols or alkylene glycols. The quantity of water in the aqueous medium is, for example, 30% by weight or more, preferably 40% or more preferably 50%.

The medium may be monophase or multiphase.

The medium may comprise an alcohol, such as ethanol or isopropanol, for example, or a glycol derivative, in particular ethylene glycol or propylene glycol.

The medium may be transparent or translucent, and colored or not colored. The medium containing the photonic particles may contain no pigment or colorant. The coloration of the medium may be due to adding an additional coloring agent.

The medium may comprise a volatile solvant. The term "volatile solvant" as used in the context of the invention means any liquid capable of evaporating in contact with keratinous materials, at ambient temperature and at atmospheric pressure.

The medium may in particular be selected such that the composition contains at least 5%, or even at least 30% of volatile solvant.

The medium may comprise a film-forming polymer improving protection persistence.

Film-forming polymer

In the present invention, the term "film-forming polymer" means a polymer that, by itself or in the presence of an auxiliary film-forming agent, is capable of forming a macroscopically continuous film that adheres to keratinous material, preferably a cohesive film, and more preferably a film of cohesion and mechanical

properties that are such that said film can be isolated and manipulated in isolation, for example when said film is produced by casting over a non-stick surface such as a Teflon or silicone surface.

The composition may comprise an aqueous phase and the film-forming polymer may be present in said aqueous phase. It is then preferably a polymer in dispersion or an amphiphilic or associative polymer. The term "polymer in dispersion" means polymers that are insoluble in water, in the form of particles of various sizes. The polymer may optionally be cured. The mean particle size is typically in the range 25 nm to 500 nm, preferably in the range 50 nm to 200 nm. The following polymers in aqueous dispersion may be used:

Ultrasol 2075® from Ganz Chemical, Daitosol 5000AD® from Daito Kasei, Avalure UR 450® from Noveon, DYNAMX® from National Starch, Syntran 5760® from Interpolymer, Acusol OP 301® from Rohm&Haas, and Neocryl A 1090® from Avecia.

Acrylic dispersions sold under the names Neocryl XK-90®, Neocryl A-1070®, Neocryl A-1090®, Neocryl

BT-62®, Neocryl A-1079® and Neocryl A-523® by the supplier AVECIA-NEORESINS, Dow Latex 432® by the supplier DOW CHEMICAL, Daitosol 5000 AD® or Daitosol 5000 SJ® by the supplier DAITO KASEY KOGYO, Syntran 5760® by the supplier Interpolymer, Allianz OPT by the supplier ROHM & HAAS, aqueous dispersions of acrylic or styrene/acrylic polymers sold under the trade name JONCRYL® by the supplier JOHNSON POLYMER, or aqueous dispersions of polyurethane sold under the names Neorez R-981® and

Neorez R-974® by the supplier AVECIA-NEORESINS, Avalure UR-405®, Avalure UR-410®, Avalure UR-425®, Avalure

UR-450®, Sancure 875®, Sancure 861®, Sancure 878® and Sancure 2060® by the supplier GOODRICH, Impranil 85® by the supplier BAYER, Aquamere H-1511® by the supplier HYDROMER, sulfopolyesters sold under the trade name

Eastman AQ® by the supplier Eastman Chemical Products, vinyl dispersions such as Mexomere PAM® from the supplier CHIMEX and mixtures thereof, are other examples of aqueous dispersions of particles of hydrodispersible film-forming polymers.

The term "amphiphilic or associative polymers" means polymers comprising one or more hydrophilic portions that render them partially soluble in water and one or more hydrophobic portions via which the polymers associate or interact. The following associative polymers may be used: Nuvis FX1100® from Elementis, Aculyn 22®, Aculyn 44®, Aculyn 46® from Rohm&Haas, and Viscophobe DB1000® from Amerchol. Diblock copolymers constituted by a hydrophilic block (polyacrylate, polyethylene glycol) and a hydrophobic block (polystyrene, polysiloxane) may also be used.

The composition may comprise an oily phase and the film-forming polymer may be present in said oily phase. The polymer may then be in dispersion or in solution. NAD type polymers or microgels (for example KSGs) may be used, as well as polymers of the PS-PA type or copolymers based on styrene (Kraton, Regalite) .

Examples of non-aqueous dispersions of polymer particles in one or more silicone and/or hydrocarbon oils that can be stabilized at their surface by at least one stabilizing agent, in particular a block, graft or random polymer and that may be mentioned are acrylic dispersions in isododecane, such as Mexomere PAP® from the supplier CHIMEX, and dispersions of particles of a graft ethylenic polymer, preferably acrylic, in a liquid fatty phase, the ethylenic polymer advantageously being dispersed in the absence of additional stabilizer on the surface of particles such as that described in particular in the document WO 04/055081.

Film-forming polymers that may be used in the composition of the present invention and that may be mentioned are synthetic polymers of the radical or polycondensation type, polymers of natural origin, and mixtures thereof.

In particular, the radical type film-forming

polymers may be polymers or copolymers, which are vinyls, especially acrylic polymers.

Vinyl film-forming polymers may result from

polymerizing monomers containing an ethylenically

unsaturated bond having at least one acid group and/or esters of said acid monomers and/or amides of said acid monomers, such as unsaturated a, β-ethylenically unsaturated carboxylic acids, e.g. acrylic acid,

methacrylic acid, crotonic acid, maleic acid or itaconic acid .

The polymers of natural origin, optionally modified, may be selected from shellac resin, sandarac gum,

dammars, elemis, copals, and cellulose polymers such as nitrocellulose, ethylcellulose or nitrocellulose esters selected, for example, from cellulose acetate, cellulose acetobutyrate, cellulose acetopropionate, and mixtures thereof.

The film-forming polymer may be present in the form of solid particles in aqueous or oily dispersion,

generally known as a latex or pseudolatex. The film- forming polymer may comprise one or more stable

dispersions of particles of generally spherical polymers of one or more polymers, in a physiologically acceptable liquid fatty phase. These dispersions are generally termed polymer NADs, as opposed to latexes that are aqueous polymer dispersions. These dispersions may be in the form of nanoparticles of polymers in stable

dispersion in said fatty phase. The nanoparticle size is preferably in the range 5 nm to 600 nm. The techniques for preparing said dispersions are well known to the skilled person.

The composition may comprise at least one film- forming polymer that is a linear, block, ethylenic film- forming polymer. Said polymer may comprise at least one first sequence (block) and at least one second sequence having different glass transition temperatures (Tg) , said first and second sequences being connected together via an intermediate sequence comprising at least one

constitutive monomer of the first sequence and at least one constitutive monomer of the second sequence. As an example, the first and second sequences and the block polymer may be incompatible with each other. Such polymers, for example, are described in the documents EP 1 411 069 or WO 04/028488, which are herewith

incorporated by reference.

Fatty Phase

Although the composition containing the photonic particles may be free of oil, in some exemplary

embodiments the composition of the invention may include a fatty phase. The photonic particles may optionally be contained in said fatty phase.

The fatty phase may in particular be volatile.

The composition may comprise an oil such as, for example, synthesized esters or ethers, linear or branched hydrocarbons of mineral or synthetic origin, fatty alcohols containing 8 to 26 carbon atoms, partially fluorinated hydrocarbon and/or silicone oils, silicone oils such as polymethylsiloxanes (PDMS) , which may optionally be volatile, with a linear or cyclic silicone chain, which may be liquid or pasty at ambient

temperature, and mixtures thereof; other examples are given below.

A composition in accordance with the invention may thus comprise at least one volatile oil.

Volatile oils

In the context of the present invention, the term

"volatile oil" means an oil (or non-aqueous medium) that is capable of evaporating on contact with skin in less than one hour, at ambient temperature and at atmospheric pressure .

The volatile oil is a volatile cosmetic oil, liquid at ambient temperature, in particular having a non-zero vapor pressure, at ambient temperature and atmospheric pressure, in particular having a vapor pressure in the range 0.13 Pa to 40000 Pa (10^~3 mmHg to 300 mmHg) , in particular in the range 1.3 Pa to 13000 Pa (0.01 mmHg to 100 mmHg), and more particularly in the range 1.3 Pa to 1300 Pa (0.01 mmHg to 10 mmHg). The volatile hydrocarbon oils may be selected from hydrocarbon oils of animal or vegetable origin containing 8 to 16 carbon atoms, and in particular branched Cs-Ci₆ alkanes (also termed isoparaffins ) , such as isododecane (also termed 2 , 2 , 4 , 4 , 6-pentamethylheptane) , isodecane, isohexadecane, and, for example, oils sold under the trade names Isopars^® or Permethyls^®.

Examples of volatile oils that may also be used are volatile silicones, for example linear or cyclic volatile silicone oils, especially those with a viscosity

of <8 centistokes (8 x 10^~6 m²/s), especially containing 2 to 10 silicon atoms, in particular 2 to 7 silicon atoms, said silicones optionally comprising alkyl or alkoxy groups containing 1 to 10 carbon atoms. Examples of volatile silicone oils that may be used in the invention that may be mentioned are dimethicones with a viscosity of 5 cSt to 6 cSt, octamethyl cyclotetrasiloxane, decamethyl cyclopentasiloxane, dodecamethyl

cyclohexasiloxane, heptamethyl hexyltrisiloxane,

heptamethyloctyl trisiloxane, hexamethyl disiloxane, octamethyl trisiloxane, decamethyl tetrasiloxane, dodecamethyl pentasiloxane, and mixtures thereof.

It is also possible to use fluorinated volatile oils such as nonafluoromethoxybutane or

perfluoromethylcyclopentane, and mixtures thereof.

It is also possible to use a mixture of the oils mentioned above.

Non-volatile oils

A composition of the invention may comprise a nonvolatile oil.

Within the context of the present invention, the term "non-volatile oil" means an oil having a vapor pressure of less than 0.13 Pa, in particular high

molecular mass oils. The non-volatile oils may in particular be selected from hydrocarbon oils, fluorinated where appropriate, and/or non-volatile silicone oils.

Examples of non-volatile hydrocarbon oils that may be suitable for implementing the invention that may in particular be mentioned are:

• hydrocarbon oils of animal origin;

• hydrocarbon oils of vegetable origin, such as phytostearyl esters, for example phytostearyl oleate, physostearyl isostearate or lauroyl / octyldodecyl / phytostearyl glutamate sold, for example, under the name ELDEW PS203 by AJINOMOTO, triglycerides constituted by esters of fatty acids and glycerol in which the fatty acids may have chain lengths in the range C4 to C24, and may be linear or branched, saturated or unsaturated; said oils are in particular heptanoic or octanoic

triglycerides, or wheatgerm, sunflower, grapeseed, sesame, corn, apricot, castor, shea, avocado, olive, soya, sweet almond, palm, rape, cottonseed, hazelnut, macadamia nut, jojoba, alfalfa, poppy, Hokaido squash, gourd, blackcurrant, evening primrose, millet, barley, quinoa, rye, carthame, bancoulier, passiflora, or musk rose oils; shea butter; or caprylic / capric acid

triglycerides such as those sold by the supplier

STEARINERIES DUBOIS OR those sold under the names MIGLYOL 810^®, 812^® and 818^® by the supplier DYNAMIT NOBEL;

• hydrocarbon oils of mineral or synthetic origin such as, for example:

o synthesized ethers containing 10 to 40 carbon atoms;

o linear or branched hydrocarbons of mineral or synthetic origin, such as vaseline, polydecenes,

hydrogenated polyisobutene such as parleam, squalane and mixtures thereof, and in particular hydrogenated

polyisobutene; and

o synthesized esters such as oils with formula R₁COOR₂, wherein Ri represents the residue of a linear or branched fatty acid containing 1 to 40 carbon atoms and ]¾ represents a hydrocarbon chain, especially branched, containing 1 to 40 carbon atoms, provided that Ri + R2 ≥ 10.

The esters may in particular be selected from esters, in particular of fatty acids such as, for

example :

• cetostearyl octanoate, esters of isopropyl alcohol such as isopropyl myristate, isopropyl palmitate, ethyl palmitate, 2-ethyl-hexyl palmitate, isopropyl stearate or isostearate, isostearyl isostearate, octyl stearate, hydroxyl esters such as isostearyl lactate, octyl

hydroxystearate, diisopropyl adipate, heptanoates, in particular isostearyl heptanoate, octanoates, decanoates or ricinoleates of alcohols or polyalcohols , such as propylene glycol dioctanoate, cetyl octanoate, tridecyl octanoate, 2-ethylhexyl 4-diheptanoate and palmitate, alkyl benzoate, polyethylene glycol diheptanoate,

propyleneglycol 2-diethyl hexanoate and mixtures thereof, C₁2-C15 alcohol benzoates, hexyl laurate, neopentanoic acid esters such as isodecyl neopentanoate, isotridecyl neopentanoate, isostearyl neopentanoate, octyldodecyl neopentanoate, isononanoic acid esters such as isononyl isononanoate, isotridecyl isononanoate, octyl

isononanoate, or hydroxyl esters such as isostearyl lactate, or di-isostearyl malate;

• esters of polyols, and pentaetrythritol esters, such as dipentaerythritol tetrahydroxystearat /

tetraisostearate;

· esters of diol dimers and diacid dimers, such as

Lusplan DD-DA5® and Lusplan DD-DA7®, sold by the supplier NIPPON FINE CHEMICAL and described in application FR 03 02809;

• fatty alcohols that are liquid at ambient

temperature having a branched and/or unsaturated carbon chain containing 12 to 26 carbon atoms, such as 2- octyldodecanol , isostearyl alcohol, oleic alcohol, 2- hexyldecanol , 2-butyloctanol, or 2-undecylpentadecanol ;

• higher fatty acids such as oleic acid, linoleic acid, linolenic acid and mixtures thereof; and

· dialkyl carbonates, the 2 alkyl chains possibly being identical or different, such as dicaprylyl

carbonate sold under the name Cetiol CC®, by Cognis;

• non-volatile silicone oils such as, for example, non-volatile polydimethylsiloxanes (PDMS) ,

polydimethylsiloxanes comprising pendant alkyl or alkoxy groups and/or with silicone chain ends, groups each containing 2 to 24 carbon atoms, phenyl silicones such as phenyl trimethicones , phenyl dimethicones , phenyl

trimethylsiloxy diphenylsiloxanes , diphenyl dimethicones, diphenyl methyldiphenyl trisiloxanes , or 2-phenylethyl trimethylsiloxysilicates , or dimethicones or

phenyltrimethicone with a viscosity less than or equal to 100 cSt, and mixtures thereof;

• and mixtures thereof.

The composition containing photonic particles may be free of oil, and in particular may contain no nonvolatile oil.

Complementary screens and additives

The composition comprising photonic particles may comprise at least one additive selected from adjuvants that are normal in the cosmetics field, such as fillers, coloring agents, hydrophilic or lipophilic gelling agents, active ingredients, either hydrosoluble or liposoluble, preservatives, moisturizers such as polyols and in particular glycerin, sequestrating agents,

antioxidants, solvents, fragrances, physical and chemical sunscreens, especially against UVA and/or UVB, odor absorbers, pH adjusting agents (acids or bases) , and mixtures thereof.

The composition may contain at least one active ingredient having a complementary activity in the solar protection field, such as antioxidants, whitening agents in the context of anti-pigmentation and depigmentation, or anti-ageing active ingredients.

The additional organic screens, either hydrophobic, hydrophilic or insoluble in the usual solvents, may be selected from various categories of chemical compounds. In particular, the organic screens are selected from dibenzoylmethane derivatives; anthranilates ; cinnamic derivatives; salicylic derivatives, camphor derivatives; benzophenone derivatives; β , β-diphenylacrylate

derivatives; triazine derivatives other than those with formula (I); benzalmalonate derivatives, in particular those mentioned in patent US 5 624 663; benzimidazole derivatives; imidazolines; p-aminobenzoic acid (PABA) derivatives; benzotriazole derivatives; methylene bis- (hydroxyphenyl benzotriazole) derivatives such as those described in applications US 5 237 071, US 5 166 355, GB 2 303 549, DE 197 26 184 and EP 0 893 119; benzoxazole derivatives such as those described in patent

applications EP 0 832 642, EP 1 027 883, EP 1 300 137 and DE 01 62 844; polymer screens and silicone screens such as those described in particular in application

WO 93/04665; dimers derived from CC-alkylstyrene, such as those described in patent application DE 198 55 649; 4,4- diarylbutadienes such as those described in applications EP 0 967 200, DE 197 46 654, DE 197 55 649,

EP A 1 008 586, EP 1 133 980 and EP 0 133 981; or

merocyanin derivatives such as those described in

applications WO 04/006878, WO 05/058269 and WO 06/032741, and mixtures thereof.

The screen or screens may be selected from the following screens:

Hydrophobic screens capable of absorbing UV in the range 320 nm to 400 nm (UVA)

Dibenzoylmethane derivatives

^• Butyl methoxydibenzoylmethane sold in particular under the trade name "PARSOL 1789" by DSM Nutritional Products, Inc;

^• Isopropyl dibenzoylmethane . Aminobenzophenones

n-hexyl 2- (4-diethylamino-2-hydroxybenzoyl) -benzoate sold under the trade name "UVINUL A+" by BASF.

Anthranilic derivatives

Menthyl anthranilate sold under the trade name "NEO

HELIOPAN MA" by SYMRISE.

4 , 4-diarylbutadiene derivatives

1, 1-dicarboxy (2,2' -dimethyl-propyl ) -4, 4- diphenylbutadiene .

Preferred screens are butyl methoxydibenzoylmethane and n-hexyl 2- (4-diethylamino-2-hydroxybenzoyl) -benzoate .

Hydrophobic screens capable of absorbing UV in the range 280 nm to 320 nm (UVB)

Para-aminobenzoates

^• Ethyl PABA;

^• Ethyl dihydroxypropyl PABA;

· Ethylhexyl dimethyl PABA (ESCALOL 507 from ISP) .

Salicylic derivatives

^• Homosalate sold under the name "Eusolex HMS" by Rona/EM Industries;

· Ethylhexyl salicylate sold under the name "NEO

HELIOPAN OS" by SYMRISE;

^• Dipropyleneglycol salicylate sold under the name "DIPSAL" by SCHER;

^• TEA salicylate, sold under the name "NEO HELIOPAN TS" by SYMRISE. Cinnamates

^• Ethylhexyl methoxycinnamate sold in particular under the trade name "PARSOL MCX" by DSM Nutritional Products, Inc;

· Isopropyl methoxy cinnamate;

^• Isoamyl methoxy cinnamate sold under the trade name "NEO HELIOPAN E 1000" by SYMRISE;

^• Diisopropyl methylcinnamate ;

^• Cinoxate;

· Glyceryl ethylhexanoate dimethoxycinnamate . β , β ' -diphenylacrylate derivatives

^• Octocrylene, sold in particular under the trade name "UVINUL N539" by BASF;

· Etocrylene, sold in particular under the trade name "UVINUL N35" by BASF.

Benzylidene camphor derivatives

^• 3-Benzylidene camphor manufactured under the trade name "MEXORYL SD" by CHIMEX;

^• Methylbenzylidene camphor sold under the trade name "EUSOLEX 6300" by MERCK;

^• Polyacrylamidomethyl benzylidene camphor

manufactured under the name "MEXORYL SW" by CHIMEX.

Triazine derivatives

^• Ethylhexyl triazone sold in particular under the trade name "UVINUL T150" by BASF;

^• Diethylhexyl butamido triazone sold under the trade name "UVASORB HEB" by SIGMA 3V;

^• 2 , 4 , 6-tris (dineopentyl 4 ' -amino benzalmalonate) -s- triazine ;

^• 2 , 4 , 6-tris- (diisobutyl 4 ' -amino benzalmalonate) -s- triazine ;

· 2 , 4-bis (dineopentyl 4 ' -amino benzalmalonate) -6-

(4'- n-butyl aminobenzoate) -s-triazine;^• 2 , 4-bis (n-butyl 4 ' -amino benzoate)-6- (aminopropyltrisiloxane) -s-triazine;

^• symmetrical triazine screens described in patent US 6 225 467, application WO 2004/085412 (see compounds 6 to 9) or the document "Symmetrical Triazine Derivatives", IP.COM Journal, IP.COM INC WEST HENRIETTA, NY, US (20 September 2004), in particular 2,4,6-tris- (biphenyl) -1, 3, 5-triazine (in particular 2,4,6- tris (biphenyl-4-yl-l, 3, 5-triazine) and 2,4,6- tris (terphenyl) -1, 3, 5-triazine that is discussed in applications by BEIERSDORF, numbers WO 06/035000,

WO 06/034982, WO 06/034991, WO 06/035007, WO 2006/034992, WO 2006/034985.

Imidazoline derivatives

Ethylhexyl dimethoxybenzylidene dioxoimidazoline propionate .

Benzalmalonate derivatives

· Polyorganosiloxanes having a benzalmalonate function, such as Polysilicone-15 sold under the trade name "PARSOL SLX" by DSM Nutritional Products, Inc;

• di-neopentyl 4 ' -methoxybenzalmalonate . Merocyanin derivatives

Octyl-5-N, N-diethylamino-2 -phenysuIfonyl-2 , 4- pentadienoate .

Preferred screens are homosalate,

ethylhexylsalicylate, octocrylene, ethylhexyl,

methoxycinnamate v, isoamyl methoxycinnamate, ethylhexyl triazone, and diethylhexyl butamido triazone.

The most preferred compounds are

ethylhexylsalicylate, octocrylene, ethylhexyl triazone and ethylhexyl methoxycinnamate.

Mixed hydrophobic screens capable of absorbing both UVA and UVB Benzophenone derivatives

^• Benzophenone-1 sold under the trade name "UVINUL 400" by BASF;

· Benzophenone-2 sold under the trade name "UVINUL

D50" by BASF;

^• Benzophenone-3 or oxybenzone, sold under the trade name "UVINUL M40" by BASF;

^• Benzophenone-5 ;

· Benzophenone- 6 sold under the trade name "Helisorb

11" by Norquay

Benzophenone-8 sold under the trade name "Spectra-Sorb UV-24" by American Cyanamid;

^• Benzophenone-10 ;

· Benzophenone-11 ;

^• Benzophenone-12.

Phenyl benzotriazole derivatives

^• Drometrizole trisiloxane sold under the name

"Silatrizole" by RHODIA CHIMIE;

^• methylene bis-benzotriazolyl

tetramethylbutylphenol , sold in the solid form under the trade name "MIXXIM BB/100" by FAIRMOUNT CHEMICAL or in micronized form in aqueous dispersion under the trade name "TINOSORB M" by CIBA SPECIALTY CHEMICALS.

Bis-resorcinyl triazine derivatives

Bis-ethylhexyloxyphenol methoxyphenyl triazine sold under the trade name "TINOSORB S" by CIBA GEIGY .

Benzoxazole derivatives

2,4-bis-[5 - 1 (dimethylpropyl) benzoxazol-2-yl- (4- phenyl) -imino] -6- (2-ethylhexyl) -imino-1, 3, 5-triazine sold under the name Uvasorb K2A by Sigma 3V.

The preferred screens are:

^• drometrizole trisiloxane;^• methylene bis-benzotriazolyl

tetramethylbutylphenol ;

^• bis-ethylhexyloxyphenol methoxyphenyl triazine; and

· benzophenone-3 or oxybenzone.

The most preferred are:

^• drometrizole trisiloxane ; and

^• bis-ethylhexyloxyphenol methoxyphenyl triazine Hydrosoluble screens capable of absorbing UV in the range 320 nm to 400 nm (UVA)

Terephthalylidene dicamphor acid sulfonic acid manufactured under the name "MEXORYL SX" by CHIMEX.

Bis-benzoazolyl derivatives as described in patents EP 0 669 323 and US 2 463 264, more particularly the compound disodium phenyl dibenzimidazole tetrasulfonate sold under the trade name "NEO HELIOPAN AP" by Haarmann and REIMER .

The preferred screen is terephthalylidene dicamphor acid sulfonic acid.

Hydrosoluble screens capable of absorbing UV in the range 280 nm to 320 nm (UVB) p-aminobenzoic derivatives (PABA)

^• PABA;

^• glyceryl PABA; and

^• PEG-25 PABA sold under the name "UVINUL P25" by

BASF;

· phenylbenzimidazole sulfonic acid sold in

particular under the trade name "EUSOLEX 232" by MERCK;

^• ferulic acid;

^• salicylic acid;

^• DEA methoxycinnamate ;

· benzylidene camphor sulfonic acid manufactured under the name "MEXORYL SL" by CHIMEX;^• camphor benzalkonium methosulfate manufactured under the name "MEXORYL SO" by CHIMEX; and

^• The preferred screen is phenylbenzimidazole sulfonic acid.

Mixed UVA and UVB hydrosoluble screens

Benzophenone derivatives comprising at least one sulfonic radical

· Benzophenone-4 sold under the trade name "UVINUL

MS40" by BASF;

^• benzophenone-5 ; and

^• benzophenone- 9.

The preferred screen is benzophenone-4.

The organic screen or screens of the invention may be present in the compositions of the invention in a concentration in the range 0.1% to 15%, preferably in the range 0.2% to 10%, by weight relative to the total composition weight.

Inorganic sunscreens or photoprotectors

The inorganic photoprotective agents are selected from metallic oxide pigments that may optionally be coated (mean size of primary particles: generally in the range 5 nm to 100 nm, preferably in the range 10 nm to 50 nm) , such as titanium oxide pigments (amorphous or crystalline in the form of rutile and/or anatase) , iron, zinc, zirconium, or cerium, which are all UV

photoprotectors that are well known per se.

The pigments may optionally be coated.

The coated pigments are pigments that have undergone one or more surface treatments of a chemical, electronic, or chemical-mechanical nature with compounds such as those described in Cosmetics & Toiletries, February 1990, Vol 105, pp. 53 - 64, such as amino acids, beeswax, fatty acids, fatty alcohols, anionic surfactants,

lecithins, sodium, potassium, zinc, iron, or aluminum salts of fatty acids, metallic (titanium or aluminum) alkoxides, polyethylene, silicones, proteins (collagen, elastin) , alkanolamines , oxides of silicon, metallic oxides or sodium hexametaphosphate .

In known manner, the silicones are organo-silicon polymers or oligomers with a linear or cyclic, branched or crosslinked structure, with a variable molecular weight obtained by polymerization and/or polycondensation of suitably functionalized silanes and essentially constituted by repeated principal motifs in which the silicon atoms are connected together via oxygen atoms (siloxane linkage) , with hydrocarbon radicals that may be substituted being directly bonded via a carbon atom to said silicon atoms.

The term "silicones" also encompasses pigments that are necessary for their preparation, in particular alkylsilanes .

The silicones that are used for coating pigments for suitable use in the present invention are preferably selected from the group containing alkyl silanes,

polydialkylsiloxanes and polyalkylhydrogenosiloxanes . Still more preferably, the silicones are selected from the group containing octyl trimethyl silane,

polydimethylsiloxanes and polymethylhydrogenosiloxanes .

Clearly, prior to treating them with silicones, the metallic oxide pigments may have been treated with other surface agents, in particular with cerium oxide, alumina, silica, aluminum compounds, silicon compounds, or

mixtures thereof.

More particularly, the coated pigments are titanium oxides coated with the following:

• silica, such as the product "SUNVEIL" from the supplier IKEDA;

• silica and iron oxide, such as the product

"SUNVEIL F" from the supplier IKEDA;

• silica and alumina, such as the products

"MICROTITA IUM DIOXIDE MT 500 SA" and "MICROTITANIUM DIOXIDE MT 100 SA" from the supplier TAYCA, or "TIOVEIL" from the supplier TIOXIDE;

• alumina, such as the products "TIPAQUE TTO-55 (B) " or "TIPAQUE TTO-55 (A) " from the supplier ISHIHARA, and "UVT 14/4" from the supplier KEMIRA;

• alumina and aluminum stearate, such as the

products "MICROTITA IUM DIOXIDE MT 100 T, MT 100 TX, MT 100 Z, MT-01" from the supplier TAYCA, the product

"Solaveil CT-10 W" and "Solaveil CT 100" from the

supplier UNIQEMA and the product "Eusolex T-AVO" from the supplier MERCK;

• silica, alumina and alginic acid, such as the product "MT-100 AQ" from the supplier TAYCA;

• alumina and aluminum laurate, such as the product "MICROTITANIUM DIOXIDE MT 100 S" from the supplier TAYCA;

• iron oxide and iron stearate, such as the product "MICROTITANIUM DIOXIDE MT 100 F" from the supplier TAYCA;

• zinc oxide and zinc stearate, such as the product "BR 351" from the supplier TAYCA;

· silica and alumina treated with a silicone, such as the product "MICROTITANIUM DIOXIDE MT 600 SAS",

"MICROTITANIUM DIOXIDE MT 500 SAS", or "MICROTITANIUM DIOXIDE MT 100 SAS" from the supplier TAYCA;

• silica, alumina, and aluminum stearate treated with a silicone, such as the products "STT-30-DS" from the supplier TITAN KOGYO;

• silica treated with a silicone, such as the product "UV-TITAN X 195" from the supplier KEMIRA;

• alumina treated with a silicone, such as the products "TIPAQUE TTO-55 (S)" from the supplier ISHIHARA, or "UV TITAN M 262" from the supplier KEMIRA;

• triethanolamine, such as the product "STT-65-S" from the supplier TITAN KOGYO;

• stearic acid, such as the product "TIPAQUE TTO-55 (C) " from the supplier ISHIHARA;

• sodium hexametaphosphate, such as the product

"MICROTITANIUM DIOXIDE MT 150 W" from the supplier TAYCA; • T1O₂ treated with octyl trimethyl silane, sold under the trade name "T 805" by the supplier DEGUSSA SILICES;

• T1O₂ treated with a polydimethylsiloxane, sold under the trade name "70250 Cardre UF Ti02SI3" by the supplier CARDRE;

• T1O₂ anatase/rutile treated with a

polydimethylhydrogenosiloxane sold under the trade name "MICRO TITANIUM DIOXIDE USP GRADE HYDROPHOBIC" by the supplier COLOR TECHNIQUES.

Uncoated titanium oxide pigments are, for example, sold by the supplier TAYCA under the trade names

"MICROTITANIUM DIOXIDE MT 500 B" or "MICROTITANIUM

DIOXIDE MT600 B", by the supplier DEGUSSA under the name "P 25", by the supplier WACKER under the name

"Transparent titanium oxide PW", by the supplier MIYOSHI KASEI under the name "UFTR" , by the supplier TOMEN under the name "ITS" and by the supplier TIOXIDE under the name "TIOVEIL AQ".

Examples of uncoated zinc oxide pigments are:

• those sold under the name "Z-cote" by the supplier Sunsmart ;

• those sold under the name "Nanox" by the supplier Elementis ;

· those sold under the name "Nanogard WCD 2025" by the supplier Nanophase Technologies.

Examples of coated zinc oxide pigments are:

• those sold under the name "Zinc oxide CS-5" by the supplier Toshibi (ZnO coated with

polymethylhydrogenosiloxane) ;

• those sold under the name "Nanogard Zinc Oxide FN" by the supplier Nanophase Technologies (40% dispersion in Finsolv TN, C12-C15 alcohol benzoate) ;

• those sold under the name "DAITOPERSION ZN-30" and "DAITOPERSION Zn-50" by the supplier Daito (dispersions in cyclopolymethylsiloxane / oxyethylenated

polydimethylsiloxane, containing 30% to 50% of nano-zinc oxides coated with silica and

polymethylhydrogenosiloxane) ;

• those sold under the name "NFD Ultrafine ZnO" by the supplier Daikin (ZnO coated with perfluoroalkyl phosphate and copolymer based on perfluoroalkylethyl in dispersion in cyclopentasiloxane) ;

• those sold under the name "SPD-Z1" by the supplier Shin-Etsu (ZnO coated with silicone-grafted acrylic polymer, dispersed in cyclodimethylsiloxane) ;

· those sold under the name "Escalol Z100" by the supplier ISP (ZnO-treated alumina dispersed in an

ethylhexyl methoxycinnamate / PVP-hexadecene copolymer / methicone mixture) ;

• those sold under the name "Fuji ZnO-SMS-10" by the supplier Fuji Pigment (ZnO coated with silica and

polymethylsilsesquioxane) ;

• those sold under the name "Nanox Gel TN" by the supplier Elementis (ZnO dispersed in a concentration of 55% in Ci2^_Ci5 alcohol benzoate with polycondensate of hydroxystearic acid) .

Uncoated cerium oxide pigments are sold under the name "COLLOIDAL CERIUM OXIDE" by the supplier RHONE

POULENC.

Uncoated iron oxide pigments are sold, for example, by the supplier ARNAUD under the names "NANOGARD WCD 2002 (FE 45B)", "NANOGARD IRON FE 45 BL AQ", "NANOGARD FE 45R AQ", "NANOGARD WCD 2006 (FE 45R)", or by the supplier MITSUBISHI under the name "TY-220".

Coated iron oxide pigments are, for example, sold by the supplier ARNAUD under the names "NANOGARD WCD 2008

(FE 45B FN)", "NANOGARD WCD 2009 (FE 45B 556)", "NANOGARD FE 45 BL 345", "NANOGARD FE 45 BL", or by the supplier BASF under the name "TRANSPARENT IRON OXIDE".

Mention may also be made of mixtures of metallic oxides, in particular of titanium dioxide and of cerium dioxide, including the mixture of equal weights of titanium dioxide and cerium dioxide coated with silica, sold by the supplier IKEDA under the name "SUNVEIL A", as well as a mixture of titanium dioxide and zinc dioxide coated with alumina, silica and silicone, such as the product "M 261" sold by the supplier KEMIRA, or coated with alumina, silica and glycerin, such as the product "M 211" sold by the supplier KEMIRA.

The inorganic screen or screens may be present in the compositions of the invention in a concentration in the range 0.1% to 15%, preferably in the range 0.2% to 10%, by weight relative to the total composition weight.

The additive or additives may be selected from those mentioned in the CTFA Cosmetic Ingredient Handbook, 10^th Edition, Cosmetic and Fragrance Assn, Inc., Washington DC (2004), herewith incorporated by reference.

Galenical forms

The photonic particles may be used in lotions, creams, milks, pommades, gels, films, patches, sticks, powder, pastes, for the skin, the lips, the hair or the nails .

Modes of application

The composition comprising photonic particles may be applied by hand or using an applicator.

Application may also be carried out by spraying or projection using a piezoelectric device, for example, or by transferring a layer of composition that has been deposited on an intermediate support.

Packaging

The composition may be packaged in any packaging device, especially formed from thermoplastic material, or on any support provided for that purpose.

The packaging device may be a bottle, a pump bottle, an aerosol bottle, a tube, a sachet or a pot. Example

Nanoparticles are constituted by 100% of 285 nm PMMA nanoparticles from the supplier SOKEN.

The photonic particles, obtained by spray drying, were approximately 30 ym in size.

Figure 4 represents an absorption spectrum of various compositions comprising photonic particles of the invention .

Unless otherwise specified, the expression

"comprising a" should be construed as meaning "comprising at least one".

Claims

1. A photonic particle (1) with a mean size in the range 1 ym to 500 ym, in particular in the range 1 ym to 300 ym, comprising a diffracting arrangement of hollow nanoparticles (10).

2. A photonic particle (1) according to claim 1, wherein the hollow nanoparticles (10) comprise a core and a shell, the difference in refractive index at a

diffracted wavelength between the core and the shell being 0.4 or more.

3. A photonic particle (1) according to either preceding claim, wherein the hollow nanoparticles (10) comprise a core and a shell, the ratio between a largest dimension of the core and a largest dimension of the nanoparticle (10) being in the range 0.5 to 0.8.

4. A photonic particle (1) according to any preceding

claim, having a form factor of less than 2, said particle (1) in particular being substantially

spherical in shape.

5. A photonic particle (1) according to any preceding

claim, wherein the arrangement comprises hollow nanoparticles ( 10 ) aggregated without a matrix.

6. A photonic particle (1) according to any one of claims 1 to 4, wherein the arrangement comprises hollow nanoparticles (10) aggregated or dispersed in a matrix (20) .

7. A photonic particle (1) according to any preceding

claim, wherein the hollow nanoparticles (10) are substantially spherical in shape.

8. A photonic particle (1) according to any preceding claim, wherein the hollow nanoparticles (10) are monodisperse .

9. A photonic particle (1) according to any preceding claim, wherein the hollow nanoparticles (10) have a mean size having a coefficient of variation lying in the range 5 % to 15 %.

10. A photonic particle (1) according to any preceding claim having a mean size lying in the range 1 to 50 ym, better 1 to 40 ym, better 1 to 20 ym.

11. A photonic particle (1) according to any preceding claim, the hollow nanoparticles (10) having a mean size lying in the range 100 nm to 500 nm, in

particular 100 nm to 350 nm.

12. A photonic particle (1) according to any preceding claim, wherein the nanoparticles (10) comprise a core and a shell, the core of the nanoparticles being constituted by a gas.

13. A photonic particle (1) according to any preceding claim, including at least one other diffracting arrangement of nanoparticles, in particular two other diffracting arrangements, the arrangements having different respective diffracting spectra.

14. A photonic particle (1) according to the preceding claim, wherein the arrangements produce different respective colors by diffraction, in particular red, green and blue, when illuminated with white light.

15. A photonic particle according to any preceding claim, wherein the nanoparticles are inorganic and, in particular, comprise silica.

16. A photonic particle according to any one of claims 6 to 15, wherein the matrix does not comprise additional nanoparticles , in particular of metal or metal oxide type, different from the nanoparticles constituting the diffracting arrangement.

17. A composition comprising a dispersion of photonic

particles according to any preceding claim.

18. A composition according to claim 17, characterized in that it is cosmetic and contains said dispersion of photonic particles in a cosmetically acceptable medium.

19. A method of photoprotecting a material against solar UV radiation, comprising treating said material with a composition as defined in claim 17 or comprising integrating said composition into said material.

20. A non-therapeutic, and in particular cosmetic, method of photoprotection of human keratinous material against solar UV radiation, comprising at least one step of applying a composition according to claim 18.

21. A method of coloring and/or lightening human

keratinous material, comprising a step of applying a composition according to claim 18.

22. A method of modifying the spectral reflectance of

human keratinous material, comprising a step of applying a composition according to claim 18.

23. A method of photoprotecting an ink, a paint or a

coating, comprising incorporating at least one

composition according to claim 17 into said ink or paint or said coating.

24. A method of photoprotecting a material manufactured from at least one synthetic or natural polymer, comprising treating said polymer with at least one composition comprising a dispersion of photonic particles as defined in claims 1 to 16 or comprising integrating said composition into said material.

25. A method of photoprotecting an organic or mineral glass, comprising treating said glass with at least one composition comprising a dispersion of photonic particles as defined in claims 1 to 16 or comprising integrating said composition into said glass.

26. A method of photoprotecting a material comprising at least natural fibers and/or artificial fibers and/or synthetic fibers such as textiles or papers, comprising treating said fibers with at least one composition comprising a dispersion of photonic particles as defined in claims 1 to 16 or comprising integrating said composition into said material.