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WO2016174505A1 - Compositions pour une matière première cosmétique et procédés pour les fabriquer - Google Patents

Compositions pour une matière première cosmétique et procédés pour les fabriquer Download PDF

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Publication number
WO2016174505A1
WO2016174505A1 PCT/IB2015/053184 IB2015053184W WO2016174505A1 WO 2016174505 A1 WO2016174505 A1 WO 2016174505A1 IB 2015053184 W IB2015053184 W IB 2015053184W WO 2016174505 A1 WO2016174505 A1 WO 2016174505A1
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WO
WIPO (PCT)
Prior art keywords
particles
silicone elastomer
core
functional ingredients
high wet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2015/053184
Other languages
English (en)
Inventor
Yanfu JIANG
Ik Joo Lee
Woon Jang Lee
Byung-Ho Park
Jae Uk Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KPT Ltd
Original Assignee
KPT Ltd
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Filing date
Publication date
Application filed by KPT Ltd filed Critical KPT Ltd
Publication of WO2016174505A1 publication Critical patent/WO2016174505A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/11—Encapsulated compositions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
    • A61K8/34—Alcohols
    • A61K8/345—Alcohols containing more than one hydroxy group
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/49—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds
    • A61K8/4986—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with sulfur as the only hetero atom
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/55—Phosphorus compounds
    • A61K8/553—Phospholipids, e.g. lecithin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/73—Polysaccharides
    • A61K8/731—Cellulose; Quaternized cellulose derivatives
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/73—Polysaccharides
    • A61K8/732—Starch; Amylose; Amylopectin; Derivatives thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • A61K8/8141—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • A61K8/8152—Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
    • A61K8/89—Polysiloxanes
    • A61K8/895—Polysiloxanes containing silicon bound to unsaturated aliphatic groups, e.g. vinyl dimethicone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q19/00—Preparations for care of the skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
    • A61K2800/41—Particular ingredients further characterized by their size
    • A61K2800/412—Microsized, i.e. having sizes between 0.1 and 100 microns
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
    • A61K2800/42—Colour properties
    • A61K2800/43—Pigments; Dyes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
    • A61K2800/60—Particulates further characterized by their structure or composition
    • A61K2800/61—Surface treated
    • A61K2800/62—Coated
    • A61K2800/63—More than one coating

Definitions

  • the present invention relates to compositions for cosmetic raw material comprising microcapsules containing silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point, and methods for making the same.
  • silicone elastomers which undesirably may act as rheology modifiers, when used in too important amounts.
  • compositions containing such silicone elastomer but which rheologic properties are not modified by the presence of such silicone elastomers are not modified by the presence of such silicone elastomers.
  • compositions allowing to provide to the user, the benefit of high amounts of silicone elastomer but in contrast being free from the undesirable effect with respect to their rheologic properties especially not presenting a gritty feeling.
  • ingredient may in particular be silicone elastomer and functional ingredients such as reflective particles or particles having a high wet points.
  • compositions according to the invention meet these needs. Moreover, compositions according to the invention act favorably with respect to desired optical effects on the skin, namely radiance and evenness.
  • compositions for cosmetic raw material comprising microcapsules containing at least one silicone elastomer and functional ingredients such as reflective particles or particles having a high wet points.
  • microcapsules according to the invention are particularly interesting for the following reasons.
  • the encapsulated functional ingredients such as silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticles or particles having a high wet point are kept in the microcapsules during the storage of the composition and only released upon application of said composition on the keratin material.
  • the microcapsules according to the invention are able to permanently retain the functional ingredients such as silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticles or particles having a high wet point silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointin the microcapsule during storage of the composition, and thus efficiently prevent any undesirable modification of the stability of the composition and to keep a same long-term visual effect to said composition.
  • the functional ingredients such as silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticles or particles having a high wet point silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointeither appear to be uniformly distributed in the composition or are not visible in the bulk. But in both cases, the composition is visually homogeneous.
  • microcapsules By using said microcapsules, it is possible to achieve cosmetic compositions containing greater amount of functional ingredients such as silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticles or particles having a high wet point and functional ingredients such as reflective particles or particles having a high wet point.
  • functional ingredients such as silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticles or particles having a high wet point and functional ingredients such as reflective particles or particles having a high wet point.
  • microcapsules according to the invention allow to overcome incompatibility issues due to the use of silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticle(s) with other ingredient(s) of the composition.
  • microcapsules according to the invention are also advantageously stable with a large panel of solvent/ingredient associated.
  • compositions according to the present invention are also stable in the compositions according to the present invention, preferably at high temperatures, for instance greater than or equal to 40°C, for example for one month, better two months and still better three months in an oven at 45 °C or for 15 days in an oven at 60°C.
  • the microcapsules according to the present invention present appropriate softening kinetics.
  • the hardness of the microcapsules is advantageously from 5 to 50 grams, more preferably from 6 to 20 grams and still more preferably from 7 to 10 grams. Such hardness is in conformity with an industrial process for preparing the cosmetic compositions including such microcapsules.
  • Such values of softening kinetics and hardness allow to provide not only aesthetic microcapsules but also overall aesthetic compositions.
  • silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticles, particularly nacres, may also lead to changing color compositions.
  • the encapsulated silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticles may confer a color to the composition which is different from the color obtained after application of the composition, i.e., after the microcapsules containing silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticles have been broken.
  • they have the ability of swelling or softening in contact of a liquid medium such as water and optionally at least one compound chosen from polyols, glycols and C 2 -C8 monoalcohols, and mixtures thereof, or alternatively in a liquid fatty phase (preferably an oily phase).
  • a liquid medium such as water
  • their size contributes to not create any discomfort or unfavorable, grainy feeling when applied.
  • they are soft enough to rupture upon very slight rubbing or pressing on the skin in order to release their content.
  • the microcapsules of the present invention are particularly interesting since they increase the stability of the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticle against degradation, and prevent undesirable release of the encapsulated actives into the composition during the manufacturing process and prolonged storage.
  • Another aspect of the present invention is a process of preparing the microcapsules.
  • the process includes:
  • silicone elastomer dispersing silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticles in the aqueous solution;
  • Another embodiment of the present invention is a method of preparing the microcapsules, microparticles or encapsulated particle by:
  • the solution for coating the core may not contain water.
  • the solution can contain the lower alcohol and the hydrophilic gelling agent without water.
  • the solution for coating the core does not contain a hydrophobic solvent.
  • Figure 1 is a schematic diagram illustrating a typical structure of a microcapsule of the present invention wherein A represents a core and B, and C, being different layers concentrically surrounding said core.
  • Figure 1 typically represents the microcapsule of example 12 wherein A represents the core comprising lecithin , mannitol, a corn starch binder and silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticle(s), B represents the inner layer comprising lecithin , mannitol, a corn starch binder and silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticle(s) and C represents the outer layer comprising lecithin and a corn starch binder.
  • A represents the core comprising lecithin , mannitol, a corn starch binder and silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticle(s)
  • B represents the inner layer comprising lecithin , mannitol, a corn starch binder and silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticle(s)
  • the invention is directed to a microcapsule composition containing a silicone elastomer further containing at least one core and at least one layered coating surrounding the core, and the encapsulated material(s) being at least one functional ingredients such as reflective particles or particles having a high wet point.
  • the invention is directed to a microcapsule containing a silicone elastomer further containing at least one core and at least one layered coating surrounding the core, and the encapsulated material(s) being at least one functional ingredients such as reflective particles or particles having a high wet point.
  • the encapsulated silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticle(s) is/are present in the core of the microcapsules.
  • the encapsulated silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticle(s) is/are only present in the core of the microcapsules.
  • the core of said microparticles includes at least one or several silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticles and at least one binder.
  • the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticle(s) is/are present in the core as a lipidic or aqueous dispersion.
  • at least one inner layer surrounding the core includes the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticle(s).
  • Inner layer means that this layer is obligatory surrounded by another inner or outer layer.
  • layered coating advantageously comprises at least one inner layer and one outer layer.
  • the encapsulated silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticle(s) is/are only present in at least one inner layer of the microcapsules.
  • encapsulated means that the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticle is always entrapped inside the microcapsules according to the invention.
  • the outer layer of the microcapsules encapsulating the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticle is always free from any silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticle.
  • the outer layer is free from silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticle(s) and preferably comprises at least one hydrophilic polymer and optionally a binder.
  • a binder i.e. a hydrophilic polymer
  • the encapsulated silicone elastomer and functional ingredients such as reflective particles or particles having a high wet pointparticle is present in the core of the microcapsules and in at least on inner layer.
  • the core is an organic core.
  • the core of the microparticles may consist in at least one or several silicone elastomer, silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles. If the core is not totally made of silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles, it comprises additional organic material(s).
  • the core represents from 1% to 50% by weight, preferably 5 to 30% by weight, and in particular from 10 to 20% by weight relative to the total weight of the microcapsule.
  • microcapsules have a double layer surrounded the core.
  • the microcapsules contain at least one organic layer, preferably one inner organic layer.
  • the microcapsules contain at least one layer, preferably at least one inner layer, comprising at least one binder.
  • the outer layer comprises a binder.
  • the microcapsules have a size of from 50 ⁇ to 800 ⁇ , in particular from 60 ⁇ to 600 ⁇ , and in particular from 80 ⁇ to 500 ⁇ , and in particular from 100 ⁇ ⁇ 400 ⁇ .
  • the microcapsule comprises at least 5%, preferably at least 10%, more preferably at least 30%, better at least 40%, even better at least 50%, advantageously at least 60% and in particular between 30 and 80% preferably between 40 and 75% by weight of silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle(s) relative to the weight of the microcapsule.
  • the microcapsules comprise:
  • a core comprising at least one silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle and optionally at least one additional organic material,
  • the layered coating comprising a binder selected from at least one polymer, at least one lipid-based material, and their mixture, preferably their mixture and optionally at least one silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle, -an outer layer comprising a hydrophilic polymer.
  • the microcapsules comprise a core comprising at least one organic material
  • the layered coating comprising a binder selected from at least one polymer, at least one lipid-based material, and their mixture, preferably their mixture and at least one silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle,
  • -an outer layer comprising a hydrophilic polymer
  • the core comprises at least one monosaccharide or its derivatives as said organic material, in particular a monosaccharide-polyol advantageously selected from mannitol, erythritol, xylitol, sorbitol and mixtures thereof, preferably mannitol.
  • a monosaccharide-polyol advantageously selected from mannitol, erythritol, xylitol, sorbitol and mixtures thereof, preferably mannitol.
  • the layered coating surrounding said core comprises at least one hydrophilic polymer(s) selected from the group consisting of:
  • the layered coating comprises at least hydrophilic polymer(s) selected from the group consisting of polysaccharides and derivatives, acrylic or methacrylic acid homopolymers or copolymers or salts and esters thereof, and their mixture;
  • the polysaccharides and derivatives are preferably selected from chitosan polymers, chitin polymers, cellulose polymers, starch polymers, galactomannans, alginates, carrageenans, mucopolysaccharides, and their derivatives, and the mixture thereof, more preferably starch polymers and derivatives, cellulose polymers and derivatives, and their mixture.
  • hydrophilic polymer(s) is selected from the polysaccharides and derivatives including one type of ose or several types of ose(s), preferably several types of ose(s) including at least D-glucose units.
  • hydrophilic polymer is selected from starch or derivatives, celluloses or derivatives, preferably starch or derivatives.
  • the core comprises at least one monosaccharide polyol, preferably selected from mannitol, erythritol, xylitol, sorbitol, and the layered coating comprises at least one polysaccharides (or its derivatives) including as oses at least D-Glucose unit(s), preferably selected from starch or derivatives, celluloses or derivatives, preferably starch or derivatives.
  • monosaccharide polyol preferably selected from mannitol, erythritol, xylitol, sorbitol
  • the layered coating comprises at least one polysaccharides (or its derivatives) including as oses at least D-Glucose unit(s), preferably selected from starch or derivatives, celluloses or derivatives, preferably starch or derivatives.
  • the outer layer of microcapsule is free from silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle and preferably comprises at least one hydrophilic polymer and optionally a binder.
  • the outer layer comprising at least one hydrophilic polymer defined in the above list.
  • this hydrophilic polymer is at least one wall-forming polymer preferably selected from polysaccharides such as cellulose derivatives, in particular cellulose ether and cellulose ester, from (poly)(alkyl)(meth)acrylic acid and derivatives, notably (poly)(alkyl)(meth)acrylate and derivatives, and preferably from alkylacrylic/alkylmethacrylic acid copolymers and their derivatives.
  • the microcapsules include at least one lipid based material, preferably with amphiphilic properties such as lecithins and in particular hydrogenated lecithin.
  • the term "keratin material” is intended to cover the skin, mucous membranes such as the lips, the nails and the eyelashes.
  • the skin and the lips, in particular facial skin, are most particularly considered according to the invention.
  • microcapsule refers to a spherical microcapsule containing at least one layered coating and surrounding a core chemically different from the coating. Microcapsules are distinct from microspheres, which consist of spherical homogeneous matrix.
  • the "at least one layered coating” is a multi-layered coating preferably an organic multi-layered coating.
  • multi-layer microcapsule refers to a microcapsule consisting of a core surrounded by a coating based on one or more inner layer(s) and one outer layer.
  • the one or more inner layer(s) forming the multi-layer coating of the multi-layer microcapsule and the single outer layer of the microcapsule may be formed of the same or different wall-forming organic compound(s).
  • the microcapsule according to the invention comprises a core also called "inner core” surrounded by a coating based on one or more layer(s).
  • the microcapsule is a 'multi-layers' microcapsule, comprising at least one inner layer and one outer layer.
  • the one or more inner layer(s) forming the multi-layer coating of the multi-layer microcapsule and the single outer layer of the microcapsule may be formed of the same or different wall-forming organic compound(s).
  • the inner layer and the outer layer are formed of the same wall forming organic compounds, the core is then surrounded by a one layer coating.
  • wall-forming organic compound refers to an organic compound or a combination of two or more different organic compounds as defined herein, which form a component of the layer(s) of the microcapsules.
  • the 'wall-forming organic compound' comprises at least one polymer.
  • average particle sizes of up to about 800 ⁇ in diameter of microcapsules are used according to the invention.
  • the average particle size is less than about 400 ⁇ in diameter of the microcapsules for skin care applications.
  • the average particle size is in the range of about 10 ⁇ to 350 ⁇ in diameter.
  • the average particle size will be from 50 ⁇ to 800 ⁇ , in particular from 60 ⁇ to 600 ⁇ , and in particular from 80 ⁇ to 500 ⁇ , and in particular from 100 ⁇ to 400 ⁇ in diameter.
  • the average particle size may be from 50 to 1,000 Mesh (around 400 ⁇ to 10 ⁇ ), in particular from 60 to 200 Mesh (around 250 ⁇ to 75 ⁇ ) as measured by the sieving test method or observed by microscope.
  • the core is made of silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle and/or of at least an organic material.
  • the size of said core preferably ranges from 500 nm to 150 ⁇ in diameter.
  • the core is in a solid and/or crystal form at room temperature.
  • the organic material is selected from organic materials having high water dissolvability.
  • the core is water-soluble or water-dispersible.
  • the core is based on only one compound, preferably one organic compound.
  • This compound may be one silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle.
  • This compound may be a natural compound.
  • the core is sugar-alcohol, preferably a monosaccharide-polyol advantageously selected from mannitol, erythritol, xylitol and sorbitol.
  • the core is made of mannitol and more preferably exclusively made of mannitol.
  • the core contains at least mannitol and at least one additional ingredient being preferably a polymer selected from hydrophilic polymers.
  • a core may comprise mannitol and hydrophilic polymers chosen among cellulose polymers, starch polymers and their mixture, preferably their mixture.
  • the cellulose polymer is a carboxymethylcellulose and the starch polymer is a non-modified natural starch, for example corn starch.
  • the core may be constituted by a seed (or crystal) of one of the previous materials.
  • the core is preferably contained in an amount of from 1% to 50% by weight, preferably 4 to 40% by weight, in particular 5 to 30% by weight, and in particular from 10 to 20% by weight with respect to the total weight of the microcapsule.
  • the mannitol is preferably contained in an amount of from 2% to 100% by weight, preferably 5 to 100% by weight, and in particular 100% by weight with respect to the total weight of the core.
  • the mannitol is preferably contained in an amount of from 1% to 50% by weight, preferably 4% to 40% by weight, in particular 5% to 30% by weight, and in particular from 10% to 20% by weight with respect to the total weight of the microcapsule.
  • the core is advantageously surrounded with a coating, or external layer(s) preferably comprising at least one inner layer and one outer layer.
  • these layers preferably extend concentrically in respect with the core.
  • the layer(s) is/are preferably organic, i.e. contain(s) at least one organic compound as wall-forming material.
  • the inner and/or outer layer(s) include(s) at least one polymer, and in particular a hydrophilic polymer.
  • composition according to the invention comprises one or more polymer(s).
  • the polymer(s) is/are hydrophilic polymer(s).
  • Such hydrophilic polymer(s) is/are soluble or dispersible in water or in alcohol compounds, in particular chosen from lower alcohols, glycols, polyols.
  • hydrophilic polymer means a (co)polymer that is capable of forming hydrogen bond(s) with water or alcohol compounds, in particular chosen from lower alcohols, glycols, polyols.
  • polymers are concerned which are capable of forming O-H, N-H and S-H bonds.
  • the hydrophilic polymer may swell or soften in contact with water or alcohol compounds, in particular chosen from lower alcohols, glycols, polyols.
  • the hydrophilic polymer(s) may be chosen from the following polymer(s):
  • polyacrylic acid/alkyl acrylate copolymers preferably modified or unmodified carboxyvinyl polymers
  • the copolymers most particularly preferred according to the present invention are acrylate/Cio-C3o-alkylacrylate copolymers (INCI name: Acrylates/Cio-30 Alkyl acrylate Crosspolymer) such as the products sold by the company Lubrizol under the trade names Pemulen TR1, Pemulen TR2, Carbopol 1382 and Carbopol ETD 2020, and even more preferentially Pemulen TR-2;
  • - AMPS/acrylamide copolymers such as the products Sepigel or Simulgel sold by the company SEPPIC, especially a copolymer of INCI name Polyacrylamide (and) CI 3- 14 Isoparaffin (and) Laureth-7;
  • cellulose polymers and derivatives preferably other than alkylcellulose, chosen from hydroxy ethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, hydroxymethylcellulose, ethylhydroxyethylcellulose and carboxymethylcellulose, and also quaternized cellulose derivatives; in a preferred embodiment, the cellulose polymers is a carboxymethylcellulose;
  • starch polymers and derivatives, eventually modified in a preferred embodiment, the starch polymer is a natural starch
  • polymers of natural origin such as galactomannans and derivatives thereof, such as konjac gum, gellan gum, locust bean gum, fenugreek gum, karaya gum, gum tragacanth, gum arabic, acacia gum, guar gum, hydroxypropyl guar, hydroxypropyl guar modified with sodium methylcarboxylate groups (Jaguar XC97-1, Rhodia), hydroxypropyltrimethylammonium guar chloride, and xanthan derivatives;
  • galactomannans and derivatives thereof such as konjac gum, gellan gum, locust bean gum, fenugreek gum, karaya gum, gum tragacanth, gum arabic, acacia gum, guar gum, hydroxypropyl guar, hydroxypropyl guar modified with sodium methylcarboxylate groups (Jaguar XC97-1, Rhodia), hydroxypropyltrimethylammonium gu
  • vinyl polymers for instance polyvinylpyrrolidones, copolymers of methyl vinyl ether and of malic anhydride, the copolymer of vinyl acetate and of crotonic acid, copolymers of vinylpyrrolidone and of vinyl acetate; copolymers of vinylpyrrolidone and of caprolactam; polyvinyl alcohol;
  • composition according to the invention and in particular the external layer(s) comprise(s) hydrophilic polymers selected from the group consisting of polysaccharides and derivatives, acrylic or methacrylic acid homopolymers or copolymers or salts and esters thereof, and their mixture.
  • hydrophilic polymers selected from the group consisting of polysaccharides and derivatives, acrylic or methacrylic acid homopolymers or copolymers or salts and esters thereof, and their mixture.
  • the said polymer(s) is (are) advantageously selected from (poly)(alkyl)(meth)acrylic acid and derivatives, notably (poly)(alkyl)(meth)acrylate and derivatives, preferably from alkylacrylic /alkylmethacrylic acid copolymers and their derivatives, and most preferably is a copolymer of ethyl acrylate, methyl methacrylate and low content of methacrylic acid ester with quaternary ammonium groups provided under the tradename of EUDRAGIT RSPO from Evonik Degussa.
  • Said polysaccharides and derivatives are preferably selected from chitosan polymers, chitin polymers, cellulose polymers, starch polymers, galactomannans, alginates, carrageenans, mucopolysaccharides, and their derivatives, and the mixture thereof.
  • the external layer(s) is/are devoid of microcrystalline cellulose.
  • said polysaccharides and their derivatives are preferably selected from the ones including one type of ose or several types of ose(s), preferably several types of oses, in particular at least D-Glucose unit(s) as ose(s), preferably starch polymers, cellulose polymers, and derivatives, and the mixture thereof.
  • the microcapsule contains at least one hydrophilic polymer selected from the group consisting of starch and its derivatives, in particular corn starch, cellulose and its derivatives, homo- and/or co-polymer of methacrylic acid and/or methacrylic acid ester or co-polymer of (alkyl)acrylic acid and/or (alkyl)methacrylic acid and their derivatives, preferably their salts and their ester, and in particular the capsule contains polymethyl methacrylate.
  • starch and its derivatives in particular corn starch, cellulose and its derivatives, homo- and/or co-polymer of methacrylic acid and/or methacrylic acid ester or co-polymer of (alkyl)acrylic acid and/or (alkyl)methacrylic acid and their derivatives, preferably their salts and their ester, and in particular the capsule contains polymethyl methacrylate.
  • Starch usable according to the present invention is usually issued from vegetable raw materials, such as rice, soybeans, potatoes, or corn.
  • Starch can be unmodified or (by analogy with cellulose) modified starch.
  • the starch is unmodified.
  • Preferred homo- and /or co-polymer of methacrylic acid and/or methacrylic acid ester are those wherein the copolymer of methyl methacrylate and ethyl acrylate has a molecular weight from 750 to 850 kDa.
  • Cellulose derivatives include, for example, alkali celluloses carboxymethyl cellulose (CMC), cellulose esters and ethers, and aminocelluloses.
  • the cellulose is a carboxymethyl cellulose (CMC).
  • the capsule contains at least starch derivative, in particular corn starch, polymethyl methacrylate, co-polymer of (alkyl)acrylic acid and/or (alkyl)methacrylic acid and their derivatives preferably their salts and their ester, and/or cellulose derivative.
  • starch derivative in particular corn starch, polymethyl methacrylate, co-polymer of (alkyl)acrylic acid and/or (alkyl)methacrylic acid and their derivatives preferably their salts and their ester, and/or cellulose derivative.
  • the microcapsule contains polymer(s) which are not cross-linked.
  • the polymer(s) may be in one or several layer(s). In another embodiment, the polymer(s) may be in the core.
  • the microcapsule may contain polymer(s) in the core and/or in the layer(s).
  • the polymer(s) is (are) in the core and in the layer(s).
  • the core contains at least starch and/or cellulose derivative as polymer(s).
  • starch represents the main ingredient of such a core, i.e. the weight amount of starch is greater than the respective amount of other compounds of the core.
  • the polymer may represent from 0.5 to 20% by weight of the microcapsule, in particular from 1 to 10% by weight, preferably from 2 to 8% by weight of the microcapsule.
  • the different layers forming the coating may be based on identical or different polymers.
  • they will be formed from the same polymer.
  • a core made of at least one silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle and or a monosaccharide- polyol, preferably mannitol,
  • At least one hydrophilic polymer preferably selected from polysaccharide or derivatives, and more preferably from starch or derivatives, and advantageously at least one lipid based material, preferably an amphiphilic compound, more preferably a phospholipid, even more preferably phosphoacylglycerol such as hydrogenated lecithin.
  • the inner and/or outer layer(s) may also include advantageously at least one lipid- based material.
  • such a lipid-based material may have amphiphilic properties, that is to say having an apolar part and a polar part.
  • Such lipid-based material can include at least one or several C12-C22 fatty acid chain(s) such as those selected from stearic acid, palmitic acid, oleic acid, linoleic acid, linolenic acid, etc., and mixtures thereof.
  • these fatty acids chains are hydrogenated.
  • these fatty acid chains may be the apolar part of a lipid-based material.
  • Such lipid-based material is preferably selected from phospholipids. These phospholipids are preferably selected from phosphoacylglycerol, more preferably selected from lecithins, and are in particular hydrogenated lecithin.
  • the lipid based material may represent from 0.05 to 5% by weight of the microcapsule, in particular from 0.1 to 1% by weight of microcapsule.
  • the multi-layer coating contains at least starch as polymer and at least one lipid-based material, which is preferably lecithin.
  • microcapsules according to the invention include at least one monosaccharide or its derivative and at least one polysaccharide or its derivatives.
  • the microcapsules include a core comprising a monosaccharide derivative and a coating comprising a polysaccharide (or its derivative) including one type of ose or several types of ose(s), preferably several types of oses.
  • the microcapsules include a core comprising a monosaccharide polyol, preferably selected from mannitol, erythritol, xylitol, sorbitol, and a coating comprising a polysaccharide (or its derivative) including as ose(s) at least one or more D-Glucose unit(s).
  • a monosaccharide polyol preferably selected from mannitol, erythritol, xylitol, sorbitol
  • a coating comprising a polysaccharide (or its derivative) including as ose(s) at least one or more D-Glucose unit(s).
  • the microcapsules additionally include a lipid- based material chosen from phospholipids, advantageously selected from phosphoacylglycerol and in particular from lecithins.
  • the core contains mannitol, starch polymer and cellulose derivatives and optionally a lipid-based material.
  • the starch polymer is the main ingredient i.e. the weight amount of starch is greater than the respective amount of mannitol, cellulose derivative and lipid-based material of the core.
  • the microcapsules comprise at least:
  • a core comprising at least one silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle, a monosaccharide-polyol, preferably mannitol, a lipid based material preferably lecithin and a hydrophilic polymer preferably starch,
  • an inner layer comprising starch as a binder, a polymer selected form alkylacrylic /alkylmethacrylic acid copolymers and their derivatives , a lipid based material preferably hydrogenated lecithin, a plasticizer, microcrystalline cellulose, hydroxypropylcellulose and optionally at least one silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle which may be the same or different from the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle contained ion the core,
  • an outer layer comprising Ti02, a polymer preferably selected form alkylacrylic /alkylmethacrylic acid copolymers and their derivatives and a optionally a binder preferably starch.
  • the microcapsules comprise at least:
  • a core comprising at least one, a monosaccharide-polyol, preferably mannitol, a lipid based material preferably lecithin and a hydrophilic polymer preferably starch,
  • an inner layer made of comprising at least one silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle which may be the same or different from the refelective particle contained in the core, a monosaccharide- polyol, preferably mannitol, a lipid based material preferably hydrogenated lecithin,
  • an outer layer made of a lipid based material preferably hydrogenated lecithin and a hydrophilic polymer preferably starch.
  • Silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point Particles
  • microcapsules used in the present invention comprise silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles in the form of flakes, more particularly having a ratio d/e greater than 10.
  • Silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles used in the present invention preferably have a refracting index greater or equal to 1.8. This allows to confer a light effect and radiance upon microcapsule rupture at the time of application of the composition.
  • particles in the form of flakes » means particles in a plate form. This means that these particles have a greatest dimension called « d » and a thickness called « e » the ratio between the greatest dimension and the thickness of the particles that is "d/e" being greater than 10, preferably greater than 20, for example greater than 50.
  • the particles may have at least one plane face, or may have a radius of curvature that is greater than or equal to 60 ⁇ . This may make it easier to stack the particles and to increase their specular silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point power.
  • a greatest dimension of the particles may lie in the range 5 ⁇ to 100 ⁇ , more preferably still in the range 10 ⁇ to 60 ⁇ .
  • the size of the particles is preferably greater than or equal to 10 ⁇ , better greater than or equal to 20 ⁇ , still better greater than or equal to 40 ⁇ .
  • the form factor "d/e" of said particles is advantageously greater than or equal to 10, better greater than or equal to 20, still better greater than or equal to 50.
  • Silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles in the form of flakes are preferably relatively monodispersed with regard to their greatest cross dimension, less or more 30%. This makes the particle deposit easier. Preferably their surface is regular, non-rough.
  • silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point power of the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles
  • the particles of silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point power that is to be measured is applied in uniform manner, at a rate of 0.2 milligrams per square centimeter (mg/cm 2 ), on a surface made of black Bioskin®, sold by Beaulax.
  • the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point power is measured with the GP-5 goniophotometer sold by Murakami.
  • the angle of incidence is fixed at -45°, and the reflectance is measured over the range -90° to 90°.
  • the reflectance maximum, corresponding to specular reflectance, is generally measured at 45°, and it is marked R45.
  • the reflectance minimum, corresponding to diffuse reflectance is generally measured at -30°, and it is marked R-30.
  • the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point power of the particles is defined by R15/R-30.
  • the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point power of the particles of the invention, may preferably be greater than 5, more preferably greater than 7, and better greater than 10.
  • the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles, in particular particles in the form of flakes, are present at a content that is greater than or equal to 5% by weight, preferably greater than or equal to 10% by weight, better greater than or equal to 20% by weight, ETC and better still greater than or equal to 60% by weight, relative to the total weight of the powder composition, for example ranging fromlO to 90%, by weight relative to the total weight of the microcapsule.
  • a bead according to the invention comprises silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles in the form of flakes and having a ratio d/e equal to or greater than 10 selected in the group consisting of:
  • - flake particles having at least two parallel faces that consist of a single material which is optically uniform; and - flake particles that have a layered structure with at least two layers of material that are different optically preferably selected from pigments having a substrate and coating structure, or pigments that are multilayered without a substrate and their mixture, also called multilayer interference pigments,
  • a bead according to the invention comprises particles in the form of flakes and having a ratio d/e equal to or greater than 10 selected in the group consisting of multilayer interference pigments and their mixture, preferably said multilayer interference pigments being selected from nacres, silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point interference particles, goniochromatic pigments and their mixture.
  • the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles according to the invention are selected from inorganic particles coated with metallic (poly)oxydes.
  • mica or synthetic fluorphologopite may be cited, preferably mica.
  • metallic (poly)oxydes mention may be made of: titanium dioxide, iron oxide, tin oxide, and their mixture, and preferably of at least titanium dioxide.
  • such an inorganic particle is a mica- titanium dioxide, a mica-titanium dioxide-tin oxide or a mica-titanium dioxide- iron oxide particle.
  • Flake particles having at least two parallel faces that consist of a single material that is optically uniform
  • flake particles having at least two parallel faces that consist of a single material that is optically uniform mention may be made of: metal-effect pigments, such as metal flakes, e.g. flakes of aluminum or of metal-alloy, e.g. copper-zinc alloy; silica, synthetic mica, or glass particles; or transparent-effect pigments such as crystalline bismuth oxychloride or polycrystalline titanium dioxide.
  • metal pigments mention may be made of aluminum, bronze, or copper powders that are coated with Si0 2 and sold under the trade name VISIONAIRE by ECKART.
  • compositions sold under the name SILKYFLAKE by Nippon Sheet Glass As examples of glass flakes, mention may be made of compositions sold under the name SILKYFLAKE by Nippon Sheet Glass.
  • bismuth oxychloride-based pigment mention may be made of BIRON pigments sold by Merck, and PEARL compositions sold by FARMAQUIMIA.
  • multilayer interference pigment means a pigment that is capable of producing a color by an interference phenomenon between the light rays reflected by a plurality of superposed layers of different refractive indices, in particular a succession of layers of high and low refractive indices.
  • Any multilayer interference pigment may be envisaged.
  • any color may be produced by the multilayer interference pigment, e.g. optionally being of dominant wavelength lying in the range 580 nm to 650 nm.
  • the composition may include a single multilayer interference pigment or a plurality of multilayer interference pigments having different dominant wavelengths.
  • the multilayer interference pigment may comprise a substrate (also known as a core) that is covered, on at least one face, by one or more layers made of materials and thicknesses that are selected such that a color is produced by interference.
  • Layers of the interference pigment may optionally surround the substrate which may present an optionally flat shape.
  • silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles have a multilayer structure
  • they may comprise a natural or synthetic substrate, particularly a synthetic substrate at least partially coated by at least one layer of a silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point material in particular a layer made of metal or metallic material.
  • the substrate may be made of a single material or a plurality of materials; it may be mineral or organic.
  • the substrate may include natural glass, ceramic, graphite, metal oxide, alumina, silica, silicates, particularly alumina-silicates, boro-silicates, synthetic mica, or their mixture.
  • the substrate may include natural mica, synthetic mica, glass, alumina, silica, or even any metal, alloy, or metal oxide.
  • the type of substrate could be selected as a function of the glossiness desired. For example, for a very glossy result, a substrate made of glass or of metal could be preferred.
  • the interference pigment may include more than four layers of different refractive indices.
  • the size of the particles of the multilayer interference pigment lies in the range 1 ⁇ to 2000 ⁇ , for example, better in the range 5 ⁇ to 2000 ⁇ .
  • the proportion of multilayer interference pigment is greater than 7%, for example, and lies in the range 7% to 20%, for example, for a non-powder, liquid, or cast composition, e.g. a composition in stick form, and in the range 40% to 95%, for example, for a loose- or compacted-powder composition.
  • Nacres are examples of suitable multilayer interference pigments.
  • nacre means colored particles of any form, which may optionally be iridescent, as produced in the shells of certain mollusks, or which are synthesized, and which exhibit a "pearlescent” coloring effect by optical interference.
  • nacre pigments such as mica titanium coated with iron oxide, mica coated with bismuth oxychloride, mica titanium coated with chromium oxide, mica titanium coated with an organic colorant in particular, and nacre pigments based on bismuth oxychloride.
  • nacre pigments such as mica titanium coated with iron oxide, mica coated with bismuth oxychloride, mica titanium coated with chromium oxide, mica titanium coated with an organic colorant in particular, and nacre pigments based on bismuth oxychloride.
  • “Mica titanium” means mica coated with Ti0 2 .
  • They may also be particles of mica on the surface of which at least two successive layers of metal oxides and/or organic coloring substances have been superimposed.
  • the nacres may have a yellow, pink, red, bronze, orangey, brown, gold, and/or coppery color or glint.
  • Illustrative examples of nacres suitable for being introduced as a multilayer interference pigment and that may be mentioned are gold color nacres, in particular those sold by ENGELHARD under the trade names Brillant gold 20 212G (Timica), Gold 222C (Cloisonne), Sparkle gold (Timica), Gold 4504 (Chromalite), and Monarch gold 233X (Cloisonne); bronze nacres, in particular those sold by MERCK under the trade names Bronze fine (17384) (Colorona) and Bronze (17353) (Colorona), and by ENGELHARD under the trade name Super bronze (Cloisonne); orange nacres in particular those sold by ENGELHARD under the trade names Orange 363C (Cloisonne) and Orange MCR 101 (Cosmica), and by MERCK under the trade names Passion orange (Colorona) and Matte
  • Glass-based interference particles such as Ronastar sold by MERCK or synthetic mica-based interference particles such as Sunshine sold by SUN CHEMICAL or PROMINENCE sold by NIKON KOKEN and their mixture may also be cited.
  • multilayer interference pigments presenting magnetic properties are those sold under the trade names: COLORONA BLACKSTAR BLUE, COLORONA BLACKSTAR GREEN, COLORONA BLACKSTAR GOLD, COLORONA BLACKSTAR RED, CLOISONNE NU ANTIQUE SUPER GREEN, MICRONA MATTE BLACK (17437), MICA BLACK (17260), COLORONA PATINA SILVER (17289), and COLORONA PATINA GOLD (117288) by MERCK; or indeed: FLAMENCO TWILIGHT RED, FLAMENCO 25 TWILIGHT GREEN, FLAMENCO TWILIGHT GOLD, FLAMENCO TWILIGHT BLUE, TIMICA NU ANTIQUE SILVER 110 AB, TIMICA NU ANTIQUE GOLD 212 GB, TIMICA NU- ANTIQUE COPPER 340 AB, TIMICA NU ANTIQUE BRONZE 240 AB, CLOISONNE NU ANTIQUE GREEN 828 C
  • the multilayer interference pigment may also be selected from the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point interference particles.
  • Silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point interference particles
  • These particles may be selected from particles of synthetic substrate at least partially coated with at least one layer of at least one metal oxide selected, for example, from oxides of titanium, in particular Ti0 2 , of iron, in particular Fe 2 0 3 , of tin, or of chromium, barium sulfate, and the following materials: MgF 2 , CrF 3 , ZnS, ZnSe, Si0 2 , A1 2 0 3 , MgO, Y 2 0 3 , Se0 3 , SiO, Hf0 2 , Zr0 2 , Ce0 2 , Nb 2 0 5 , Ta 2 0 5 , MoS 2 , and mixtures or alloys thereof.
  • at least one metal oxide selected, for example, from oxides of titanium, in particular Ti0 2 , of iron, in particular Fe 2 0 3 , of tin, or of chromium, barium sulfate, and the following materials: MgF 2 , CrF 3 , ZnS
  • particle in the form of flakes having a layer structure made of natural or synthetic mica coated with at least one layer of metal oxide, chosen from oxides of titanium, in particular Ti0 2 , of iron, in particular Fe 2 0 3 , of tin, or of chromium, barium sulfate, and the following materials: MgF 2 , CrF 3 , ZnS, ZnSe, Si0 2 , A1 2 0 3 , MgO, Y 2 0 3 , Se0 3 , SiO, Hf0 2 , Zr0 2 , Ce0 2 , Nb 2 0 5 , Ta 2 0 5 , MoS 2 , and mixtures or alloys thereof.
  • metal oxide chosen from oxides of titanium, in particular Ti0 2 , of iron, in particular Fe 2 0 3 , of tin, or of chromium, barium sulfate, and the following materials: MgF 2 , CrF 3 , ZnS, ZnSe, Si0
  • particles comprising a substrate of synthetic mica coated with titanium dioxide, or glass particles coated either with brown iron oxide, titanium oxide, tin oxide, or one mixture thereof such as those sold under the trade name REFLECKS® by ENGELHARD.
  • particles comprising a mineral substrate coated with a metal layer, particles having a boro-silicate substrate coated with silver sold under the trade name METASFflNE ® by Nippon Sheet Glass.
  • the multilayer interference pigment may also be a goniochromatic pigment.
  • goniochromatic pigment as used in the context of the present invention means a pigment that makes it possible, when the composition is spread on a substrate, to obtain a color path in the a*b* plane of the 1976 CIE color space which corresponds to a variation Dh° of the hue angle h° of at least 20° when the angle of observation is varied relative to the normal in the range 0 to 80° for light at an angle of incidence of 45°.
  • the color path may be measured by means of a spectrogonioreflectometer, from INSTRUMENT SYSTEMS and referenced GON 360 GONIOMETER, after the composition has been spread in the fluid state to a thickness of 300 ⁇ by means of an automatic spreader on a contrast card from ERICHSEN and referenced Typ 24/5, the measurements being performed on the black background of the card.
  • a spectrogonioreflectometer from INSTRUMENT SYSTEMS and referenced GON 360 GONIOMETER
  • the goniochromatic pigment may, for example, be selected from multilayer interference structures and liquid crystal coloring agents.
  • a multilayer structure may comprise at least two layers, each layer being produced, for example, from at least one material selected from the group constituted by the following materials: MgF 2 , CeF 3 , ZnS, ZnSe, Si, Si0 2 , Ge, Te, Fe 2 0 3 , Pt, Va, A1 2 0 3 , MgO, Y 2 0 3 , S 2 0 3 , SiO, Hf0 2 , Zr0 2 , Ce0 2 , Nb 2 0 5 , Ta 2 0 5 , Ti0 2 , Ag, Al, Au, Cu, Rb, Ti, Ta, W, Zn, MoS 2 , cryolite, alloys, polymers, and combinations thereof.
  • the multilayer structure may optionally be symmetrical with respect to a central layer as regards the chemical nature of the stacked layers.
  • Examples of symmetrical multilayer interference structures are as follows: Fe 2 0 3 /Si0 2 /Fe 2 0 3 /Si0 2 /Fe 2 0 3 , a pigment having this structure being sold under the trade name SICOPEARL by BASF; MoS 2 /Si02/mica-oxide/Si0 2 /MoS2; Fe 2 0 3 /Si02/mica- oxide/Si0 2 /Fe 2 C>3; Ti0 2 /Si0 2 /Ti0 2 and Ti0 2 /Al 2 0 3 /Ti0 2 , pigments having these structures being sold under the trade name XIRONA by MERCK (Darmstadt).
  • liquid crystal coloring agents comprise silicones, or cellulose ethers onto which mesomorphic groups have been grafted.
  • suitable liquid crystal goniochromatic particles are those sold by CHENIX, and those sold under the trade name HELICONE® HC by WACKER.
  • Suitable goniochromatic pigments are some nacres; pigments having effects on synthetic substrates, in particular alumina, silica, borosilicate, iron oxide, or aluminum type substrates; or interference flakes coming from a polyterephthalate film.
  • the material may further contain dispersed goniochromatic fibers. Such fibers could present a length that is less than 80 ⁇ , for example.
  • diiffracting pigment as used in the present invention means a pigment which is capable of producing a color variation depending on the angle of observation when illuminated with white light due to the presence of a structure which diffracts light.
  • Such a pigment is also sometimes termed a holographic pigment or rainbow effect pigment.
  • a diffracting pigment may comprise a diffraction matrix capable, for example, of diffracting an incident ray of monochromatic light in predetermined directions.
  • the diffraction matrix may comprise a periodic motif, in particular a line, the distance between two adjacent motifs being of the same order of magnitude as the wavelength of the incident light.
  • the diffracting pigment may be produced with motifs having different profiles, in particular triangular, symmetrical or unsymmetrical, crenellated, with a constant or non constant width, sinusoidal, or stepped.
  • the spatial frequency of the matrix and the motif depth will be selected as a function of the desired degree of separation of the various orders.
  • the frequency may lie in the range 500 to 3000 lines per mm.
  • the particles of diffracting pigment each have a flattened form, in particular in the form of a platelet.
  • the same pigment particle may comprise two crossed diffraction matrices, which may or may not be perpendicular, and may or may not have the same spacing.
  • the diffracting pigment may have a multi-layered structure comprising a layer of silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point material, covered on at least one side by a layer of a dielectric material.
  • This layer may provide the diffracting pigment with better rigidity and durability.
  • the dielectric material may thus, for example, be selected from the following materials: MgF 2 , Si0 2 , A1 2 C>3, A1F 3 , CeF 3 , LaF 3 , NdF 3 , SmF 2 , BaF 2 , CaF 2 , LiF, and combinations thereof.
  • the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point material may, for example, be selected from metals and their alloys and also from non-metallic silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point materials.
  • Metals which may be mentioned include Al, Ag, Cu, Au, Pt, Sn, Ti, Pd, Ni, Co, Rd, Nb, Cr, and their materials, combinations or alloys.
  • Such a silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point material may alone constitute the diffracting pigment which is then a monolayer.
  • the diffracting pigment may comprise a multi-layered structure comprising a substrate of a dielectric material covered on at least one side by a silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point layer, or even completely encapsulating the substrate.
  • a layer of a dielectric material may also cover the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point layer or layers.
  • the dielectric material used is thus preferably inorganic and may, for example, be selected from metal fluorides, metal oxides, metal sulfides, metal nitrides, metal carbides and combinations thereof.
  • the dielectric material may be in the crystalline, semi-crystalline or amorphous state.
  • the dielectric material in this configuration may, for example, be selected from the following materials: MgF 2 , SiO, Si0 2 , A1 2 0 3 , Ti0 2 , WO, A1N, BN, B 4 C, WC, TiC, TiN, N 4 Si 3 , ZnS, glass particles, diamond type carbons, and combinations thereof.
  • the diffracting pigment may be composed of a dielectric or preformed ceramic material such as a mineral in natural lamellae, for example mica peroskovite or talc, or synthetic lamellae formed from glass, alumina, Si0 2 , carbon, an iron oxide/mica, mica coated with BN, BC, graphite, bismuth oxychloride, and combinations thereof.
  • a diffracting pigment may, for example, comprise the following structure: MgF 2 /Al/MgF 2 , a diffracting pigment having that structure being sold under the trade name SPECTRAFLAIR 1400 Pigment Silver by FLEX PRODUCTS, or SPECTRFLAIR 1400 Pigment Silver FG.
  • the proportion by weight of MgF 2 may be in the range 80% to 95% of the total weight of the pigment.
  • Other diffracting pigments are sold under the trade names METALURE® PRISMATIC by ECKART®.
  • the dimension of the diffracting pigment may, for example, be in the range 5 ⁇ to 200 ⁇ , better in the range 5 ⁇ to 100 ⁇ , for example in the range 5 ⁇ to 30 ⁇ .
  • the thickness of the particles of diffracting pigment may be 3 ⁇ or less, preferably 2 ⁇ , for example of the order of 1 ⁇ .
  • wet point for water in the specification means a quantity or amount of water which is necessary to make a target powder completely wet, which can be recognized, in particular, by the formation of a paste with the target powder.
  • the particle used in the microcapsules according to the present invention has a wet point for water being at least 100 ml/100 g, preferably ranging from 100 to 600 ml/100 g and more preferably from 150 to 500 ml/100 g.
  • the wet point for water can be determined by the following protocol.
  • the weight of the added water is determined as the weight of wet point.
  • spherical cellulose particles for example, the following ones marketed by Daito Kasei in Japan:
  • MOISCELL PW D-5 XP (wet point for oil is 58.6 ml/100 g, wet point for water is 281.5 ml/100 g, the ratio of the wet point for water/the wet point for oil is 4.8) with a particle size of 10 ⁇ (potassium succinate cellulose); and MOISCELL PW D-50 XP (wet point for oil is 39.9 ml/100 g, wet point for water is 160.0 ml/100 g, the ratio of the wet point for water/the wet point for oil is 4) with a particle size of 50 ⁇ (potassium succinate cellulose).
  • Cellulobeads USF and Cellulobeads D-5 are preferable.
  • Cellulobeads USF are most preferable.
  • the invention provides microcapsule containing at least one silicone elastomer(s), wherein microcapsule comprising at least one core and at least one layered coating surrounding the core.
  • microcapsules according to the invention are particularly interesting for the following reasons.
  • the microcapsules according to the invention allow to permanently retain the silicone elastomer in the microcapsule during the storage of the composition, and thus to efficiently prevent any undesirable modification of the stability of the composition and to keep a same long-term visual effect to said composition.
  • microcapsules By using said microcapsules, it is possible to achieve cosmetic compositions containing greater amount of silicone elastomer(s).
  • microcapsules according to the invention allow to overcome incompatibility issues due to the use of silicone elastomer(s) with other ingredient(s) of the composition.
  • microcapsules may be produced by a process including:
  • silicone elastomer dispersing silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles in the aqueous solution;
  • an inner layer on a core with the aqueous solution in which the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles are dispersed; forming an intermediate layer on the inner layer with an intermediate layer solution containing water, a second hydrophilic polymer, and a pigment; and
  • the step of forming the outer layer is optional.
  • the microcapsules contain the above inner layer and the above intermediate layer without the outer layer.
  • the silicone elastomer is dispersed in the inner layer, in the outer layer, or throughout the microcapsule.
  • the hydrophilic polymer, the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles, the pigment, and the core can be any one or combination of those listed above.
  • the properties such as the size of the core or the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles can be the same as those described above.
  • the first, second, and third hydrophilic polymers can be the same or different.
  • the microcapsules containing a silion elastomer are produced by this process and comprise a combination of silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles and at least one polymer chosen from poly-vinyl Alcohol (PVA); starch polymers and derivatives, preferably hydroxypropylstarch phosphate ; ethylcellulose ; hydroxypropylmethylcellulose and their mixtures; preferably a combination of silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles, poly-vinyl Alcohol (PVA) and hydroxypropylstarch phosphate.
  • PVA poly-vinyl Alcohol
  • PVA poly-vinyl Alcohol
  • the combination of silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles and at least one polymer chosen from poly-vinyl Alcohol (PVA) ; starch polymers and derivatives ; ethylcellulose ; hydroxypropylmethylcellulose and their mixtures is in the inner layer.
  • PVA poly-vinyl Alcohol
  • the microcapsules comprise at least: a core comprising a monosaccharide-polyol, preferably mannitol, ,
  • an inner layer comprising the combination of silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles and at least one polymer chosen from poly-vinyl Alcohol (PVA) ; starch polymers and derivatives ; ethylcellulose ; hydroxypropylmethylcellulose and their mixtures is in the inner layer,
  • PVA poly-vinyl Alcohol
  • an outer layer comprising Ti02, a polymer and a optionally a binder
  • a silicone elastomer is dispersed in the inner layer, in the outer layer, or throughout the microcapsule.
  • the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles are chosen among nacres.
  • the amount of each of water, the hydrophilic polymer, and the core can be any amount determined by a person of ordinary skill in the art.
  • the aqueous solution can be prepared by dissolving 100-200 weight parts of the hydrophilic polymer in 7,000- 16,000 weight parts of water, and 500-1,500 weight parts of the silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles can be added to the solution.
  • a mixture of water and alcohol can be used instead of water.
  • 500-1,000 g of the core is coated with a spray drying process.
  • the solution for the intermediate layer can contain 2,000-5,000 weight parts of water and 2-10 weight parts of the lipid, and 10-40 weight parts of the hydrophilic polymer.
  • the solution for the outer layer can contain 300-500 weight parts of water, 1-3 weight parts of the hydrophilic polymer, and optionally 0.5-1.5 weight parts of the lipid.
  • the aqueous solution can be prepared with an appropriate way.
  • the hydrophilic polymer can be dissolved in the solution at 50-100 °C, preferably 75-99 °C, for example, 95 °C.
  • the aqueous solution can be prepared by mixing two solutions, each of which contains different hydrophilic solutions containing, for example, different hydrophilic polymers.
  • one contains a starch derivative, and another contains polyvinyl alcohol.
  • the aqueous solution can contain another aqueous solvent, for example, a lower alcohol such as ethanol.
  • At least one of the layers can contain a lipid such as one of those listed above.
  • the coating step can be carried out with a spray drying process.
  • a spray drying process Several methods known to the man skilled in the art within the coating or encapsulation domain, including spray drying, pelletization, granulation, coating, etc. may also be used.
  • Spray drying processes may be carried out by any method e.g. tangential, bottom or top spray drying. It may also be combined with a drying in a fluidized bed process. These alternatives may further be combined in order to obtain microcapsules having the required properties.
  • At least one outer layer is obtained by a combination of one or several of these alternatives: tangential, bottom or top spray drying optionally combined with a fluidized bed process.
  • the microcapsules may be obtained by a method comprising mixture of the compounds (silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particles, other optional actives, polymers, solvents) and drying to form capsules as disclosed in WOO 1/35933 and WO2011/027960, or a method comprising granulation and coating by spray drying as disclosed in FR2841155, or by fluidized bed technology, which has been used in the food and pharmaceutical industry for a long time for coating and encapsulating ingredients.
  • WO2008/139053 which concerns the preparation of spheroid multilayer capsules comprising a core of sugar and concentric layers of pharmaceutical actives. Fixation of pharmaceutical actives on the core is achieved by impregnation, pulverization or projection, and then the 1 st layer is dried before application of a second one.
  • Fluid bed process is disclosed for example in Teunou et al. (Fluid-Bed Coating, Poncelet, 2005, D. Food Science and Technology (Boca Raton, FL, United States), Volume 146 Issue Encapsulated and Powdered Foods, Pages 197-212).
  • a specific feature of the fluid bed process is that it leads to coated particles wherein the core is well encapsulated, compared to spray drying, which leads to a matrix with the core material randomly dispersed in a polymer.
  • the microcapsules are obtained by fluid bed process. According to this embodiment, preferably at least one layer of the microcapsules is obtained by fluid bed process.
  • the outer layer is obtained by fluid bed process.
  • At least one inner layer is obtained by fluid process. At least one layer, most preferably, all layers are obtained by fluid bed process.
  • a fluid bed process implemented according to the invention includes Wiirster process and/or tangential spray process.
  • Wiirster process allows, contrary to a pelletization process, to prepare spherical capsules with a core surrounded by one or more circumferential layers.
  • the microcapsule layers are advantageously regular, concentric and present a homogenous thickness.
  • this water acts as a swelling agent or as a softening agent towards these microcapsules without breaking them.
  • the microcapsules are not inert when placed in water either they swell: their diameter significantly increases with an optional softening of the microcapsules, or the microcapsules significantly soften without increasing of the diameter, they become more malleable and easier to break when applied onto the skin.
  • Water is able to act on the softening kinetics of the microcapsules and more particularly it allows to obtain a good balance between softening kinetics and hardness.
  • water is particularly advantageous for softening these microcapsules suitable for the present invention, in an appropriate way, since it plays a role on softening kinetics of said microcapsules.
  • Said microcapsules are preferably deformable in the presence of an aqueous phase, notably in the presence of water.
  • composition comprise water in a content ranging from 30% to 99% by weight, preferably from 40% to 95% more preferably from 50% to 90% by weight relative to the total weight of the said composition.
  • it also comprises at least one compound chosen from polyols, glycols and C 2 -C8 monoalcohols, and mixtures thereof.
  • Said polyol is preferably selected from the group consisting in glycerol, glycols, preferably propylene glycol, butylene glycol, pentylene glycol, hexylene glycol, dipropylene glycol, diethylene glycol, glycol ethers, preferably mono-, di- or tripropylene glycol of alkyl(Ci-C 4 )ether or mono-, di- or triethylene glycol of alkyl(Ci-C 4 )ether, and mixtures thereof.
  • Mannitol (spray dried mannitol: Pearlitol 100SD) is used as a core.
  • Mannitol is introduced into a fluidized bed coating system (Glatt GPCG 1, bottom spray) as a seed and subjected to a coating at 500ml/h of feeding rate of inner layer charged solution to obtain particles having a mannitol core coated with an inner charged layer.
  • a fluidized bed coating system (Glatt GPCG 1, bottom spray) as a seed and subjected to a coating at 500ml/h of feeding rate of inner layer charged solution to obtain particles having a mannitol core coated with an inner charged layer.
  • a coating with the resulting titanium dioxide particle coating solution is generated by a fluidized bed process to obtain particles having an inner charged layer coated with a titanium dioxide particle layer.
  • Mannitol (spray dried mannitol: Pearlitol 100SD) is used as a core.
  • Mannitol 537.5g is introduced into a fluidized bed coating system (Glatt GPCG 1, bottom spray) as a seed and subjected to a coating at 500ml/h of feeding rate of inner layer charged solution to obtain particles having a mannitol core coated with an inner charged layer.
  • This process yields particles with the size range 75 ⁇ - 212 ⁇ .
  • a coating with the resulting titanium dioxide particle coating solution is generated by a fluidized bed process to obtain particles having an inner charged layer coated with a titanium dioxide particle layer.
  • Mannitol (spray dried mannitol: Pearlitol 100SD) is used as a core.
  • Mannitol 535g is introduced into a fluidized bed coating system (Glatt GPCG 1, bottom spray) as a seed and subjected to a coating at 500ml/h of feeding rate of inner layer charged solution to obtain particles having a mannitol core coated with an inner charged layer.
  • This method generates particles with a size range of approximately 75 ⁇ - 212 ⁇ .
  • a coating with the resulting titanium dioxide particle coating solution is realized by a fluidized bed process to obtain particles having an inner charged layer coated with a titanium dioxide particle layer.
  • Mannitol (spray dried mannitol: Pearlitol 100SD) is used as a core and a silicone elastomer is dispersed in the first solution, second solution or in the inner charged coating solution
  • Starch derivative (Structure XL) is completely dissolved in 7,382g of water at room temperature to produce a first solution.
  • Syncrystal almond (a reflective particle) is added and well dispersed with a homogenizer (3000rpm, 20min.) to prepare an inner charged coating solution.
  • Mannitol 832g is introduced into a fluidized bed coating system (Glatt GPCG 1, bottom spray) as a seed and subjected to a coating at 500ml/h of feeding rate of inner layer charged solution to obtain particles having a mannitol core coated with an inner charged layer.
  • This process generates particles with the size range of approximately 75 ⁇ ⁇ 212 ⁇ .
  • a coating with the resulting titanium dioxide particle coating solution is realized by a fluidized bed process to obtain particles having an inner charged layer coated with a titanium dioxide particle layer.
  • Example le 2.0 g of cornstarch is dissolved in 400 g of water art 95°C to prepare an outer layer coating solution, which is coated onto the above titanium dioxide particle layer to obtain a microcapsule encapsulating in its inner layer, surrounding the core in mannitol, the reflective particle, and also having a titanium dioxide particle layer coated with an outer layer.
  • Coated particles produced according to this method are obtainable with a size range of approximately 75 ⁇ ⁇ 250 ⁇ .
  • Mannitol (spray dried mannitol: Pearlitol 100SD) is used as a core and a silicone elastomer is dispersed in the first solution, second solution or in the inner charged coating solution
  • Starch derivative (Structure XL) is completely dissolved at room temperature in 14,566g of water to produce a first solution.
  • 1800g of Colorona® Oriental Beige (a reflective particle) is added and well dispersed with a homogenizer (3000rpm, 20min.) to prepare an inner charged coating solution.
  • 520g of Mannitol is introduced into a fluidized bed coating system (Glatt GPCG 1, bottom spray) as a seed and subjected to a coating at 500ml/h of feeding rate of inner layer charged solution to obtain particles having a mannitol core coated with an inner charged layer.
  • This process yields articles with a size range of approximately 75 ⁇ - 212 ⁇ .
  • a coating with the resulting titanium dioxide particle coating solution is realized by a fluidized bed process to obtain particles having an inner charged layer coated with a titanium dioxide particle layer.
  • Mannitol is introduced into a fluidized bed coating system (Glatt GPOG 1, bottom spray) as a seed and subjected to a coating at 500 mi/ of feeding rate of the inner color charged solution to obtain particles having a mannitol core coated with an inner charged layer.
  • This process yields particles with the size range of approximately 75 ⁇ - 212 ⁇ .
  • a coating with the resulting titanium dioxide particle coating solution is generated by a fluidized bed process to obtain particles having an inner charged layer coated with a titanium dioxide particle layer.
  • 1.2g of cornstarch and 0.6g of hydrogenated lecithin (Lipoid P75-3) are dissolved in 400 g of water art 95°C to prepare an outer layer coating solution, which is coated onto the above titanium dioxide particle layer to obtain a microcapsule encapsulating in its inner layer, surrounding the core in mannitol, the reflective particle, and also having a titanium dioxide particle layer coated with an outer layer.
  • Coated particles prepared according to this method are obtainable with the size range of approximately 75 ⁇ ⁇ 250 ⁇ .
  • STP-F Seed 4050 (a core sphere comprising 20-30% mannitol; 20-30% microcrystalline cellulose; and 40-50% corn starch) is used as core and a silicone elastomer is dispersed in the first solution, second solution or in the inner charged coating solution.
  • a silicone elastomer is dispersed in the first solution, second solution or in the inner charged coating solution.
  • HPMC Hydrophilic propyl methyl cellulose
  • silica silylate aerogel (Dow Corning® VM-2270 AEROGEL FINE PARTICLES; aerogel at 98% dry matter in water), and 350 g of Per te- MSZ12 are added and well and dispersed with a homogenizer at 3000 rpm for 20 min to prepare a first charged coating solution.
  • STP-F Seed 4050 450.0 g is introduced into a fluidized bed coating system (Glatt GPCG 1, tangential spray) as a core seed and subjected to a coating at 450 ⁇ 500ml/h of feeding rate of inner layer charged solution to obtain particles having a "STP-F Seed 4050" core coated with a charged layer.
  • a fluidized bed coating system (Glatt GPCG 1, tangential spray) as a core seed and subjected to a coating at 450 ⁇ 500ml/h of feeding rate of inner layer charged solution to obtain particles having a "STP-F Seed 4050" core coated with a charged layer.
  • Coated particles prepared according to this process are generated having a size range of approximately 355 ⁇ ⁇ 600 ⁇ .
  • STP-F Seed 4050 is used as core and a silicone elastomer is dispersed in the first solution, second solution or in the inner charged coating solution.
  • silica silylate aerogel (Dow Corning® VM-2270 AEROGEL FINE PARTICLES; aerogel at 98% dry matter in water), and 250g of Timica
  • Terra White MN4501 are added and well dispersed with a homogenizer at 3000rpm and
  • Coated particles prepared according to this process are generated having a size range of approximately 355 ⁇ ⁇ 600 ⁇ .
  • Example 2c STP-F Seed 4050 (which is a core with fluid bed process by KPT) is used as core and a silicone elastomer is dispersed in the first solution, second solution or in the inner charged coating solution.
  • STP-F Seed 4050 is introduced into a fluidized bed coating system (Glatt GPCG 1, tangential spray) as a core seed and subjected to a coating at 500ml/h of feeding rate of inner layer charged solution to obtain particles having a 'STAPHERE F Seed 4050' core coated with a charged layer.
  • a fluidized bed coating system (Glatt GPCG 1, tangential spray) as a core seed and subjected to a coating at 500ml/h of feeding rate of inner layer charged solution to obtain particles having a 'STAPHERE F Seed 4050' core coated with a charged layer.
  • Coated particles prepared according to this process are generated having a size range of approximately 355 ⁇ ⁇ 600 ⁇ .
  • microcapsule having a core and 2 layers is prepared by the procedure provided in Example 1 or 2:
  • silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle F
  • microcapsulehaving a core and 3 layers is prepared by the procedure provided in Example 1 or 2:
  • silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle
  • Percentages indicate weight percent relative to the total microcapsule weight.
  • microcapsule having a core and 2 layers is prepared by the procedure provided in Example 1 or 2:
  • silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle A
  • Percentages indicate weight percent relative to the total microcapsule weight.
  • microcapsule having a core and 2 layers is prepared by the procedure provided in Example 1 or 2:
  • Percentages indicate weight percent relative to the total microcapsule weight.
  • microcapsule having a core and 3 layers is prepared by the procedure provided in Example 1 or 2:
  • Silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle H
  • Titanium dioxide qspl00%%
  • Percentages indicate weight percent relative to the total microcapsule weight.
  • microcapsule having a core and 3 layers is prepared by the procedure provided in Example 1 or 2:
  • silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle H
  • Titanium dioxide qspl00%. Titanium dioxide qspl00%.
  • Percentages indicate weight percent relative to the total microcapsule weight.
  • microcapsule having a core and 3 layers is prepared by the procedure provided in Example 1 or 2:
  • silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle G
  • Percentages indicate weight percent relative to the total microcapsule weight.
  • microcapsule having a core and 2 layers is prepared by the procedure provided in Example 1 or 2:
  • Percentages indicate weight percent relative to the total microcapsule weight.
  • Percentages indicate weight percent relative to the total microcapsule weight.
  • microcapsule having a core and 3 layers is prepared by the procedure provided in Example 1 or 2:
  • silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle E
  • a microcapsule as shown in Figure 1, having a core including notably mannitol and silicone elastomer and functional ingredients such as reflective particles or particles having a high wet point particle, for instance B, is prepared by the procedure provided in Example 1 or 2:

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Abstract

La présente invention concerne une composition pour une matière première cosmétique contenant une microcapsule contenant au moins un matériau encapsulé comprenant au moins un noyau et au moins une couche de revêtement entourant ledit noyau, le matériau encapsulé étant au moins un élastomère de silicone et des ingrédients fonctionnels, tels que des particules réfléchissantes ou des particules comprenant une particule à point de rosée élevé. L'invention concerne également un procédé de préparation de la composition pour une matière première cosmétique contenant une microcapsule contenant au moins un matériau encapsulé comprenant au moins un noyau et au moins une couche de revêtement entourant ledit noyau, le matériau encapsulé étant au moins un élastomère de silicone et des ingrédients fonctionnels, tels que des particules réfléchissantes ou des particules comprenant une particule à point de rosée élevé.
PCT/IB2015/053184 2015-04-30 2015-05-01 Compositions pour une matière première cosmétique et procédés pour les fabriquer Ceased WO2016174505A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180243177A1 (en) * 2015-09-03 2018-08-30 L'oreal Aqueous gel for caring for and/or making up keratin materials comprising microcapsules encapsulating an oily dispersion of at least one reflective agent
US10561588B2 (en) * 2015-09-03 2020-02-18 L'oreal Water-in-oil emulsion for caring for and/or making up keratin materials comprising microcapsules encapsulating an oily dispersion of at least one reflective agent
US10568818B2 (en) * 2015-09-03 2020-02-25 L'oreal Oil-in-water emulsion for caring for and/or making up keratin materials comprising microcapsules encapsulating an oily dispersion of at least one reflective agent

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WO2004041991A1 (fr) * 2002-11-01 2004-05-21 Salvona Llc Systeme de liberation controlee d'un multicomposant pour pains de savon
WO2013108410A1 (fr) * 2012-01-17 2013-07-25 L'oreal Composition à changement de couleur sous forme de mousse
WO2013107001A1 (fr) * 2012-01-17 2013-07-25 L'oreal Composition à changement de couleur contenant un ou plusieurs filtres uv
EP2823804A1 (fr) * 2013-07-12 2015-01-14 L'Oréal Composition changeant de couleur comprenant des pigments et une grande quantité d'eau
WO2015004630A1 (fr) * 2013-07-12 2015-01-15 L'oreal Composition qui change la couleur sous la forme d'une émulsion huile dans l'eau comprenant un tensioactif géminé

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Publication number Priority date Publication date Assignee Title
WO2004041991A1 (fr) * 2002-11-01 2004-05-21 Salvona Llc Systeme de liberation controlee d'un multicomposant pour pains de savon
WO2013108410A1 (fr) * 2012-01-17 2013-07-25 L'oreal Composition à changement de couleur sous forme de mousse
WO2013107001A1 (fr) * 2012-01-17 2013-07-25 L'oreal Composition à changement de couleur contenant un ou plusieurs filtres uv
EP2823804A1 (fr) * 2013-07-12 2015-01-14 L'Oréal Composition changeant de couleur comprenant des pigments et une grande quantité d'eau
WO2015004630A1 (fr) * 2013-07-12 2015-01-15 L'oreal Composition qui change la couleur sous la forme d'une émulsion huile dans l'eau comprenant un tensioactif géminé

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180243177A1 (en) * 2015-09-03 2018-08-30 L'oreal Aqueous gel for caring for and/or making up keratin materials comprising microcapsules encapsulating an oily dispersion of at least one reflective agent
US10561588B2 (en) * 2015-09-03 2020-02-18 L'oreal Water-in-oil emulsion for caring for and/or making up keratin materials comprising microcapsules encapsulating an oily dispersion of at least one reflective agent
US10568818B2 (en) * 2015-09-03 2020-02-25 L'oreal Oil-in-water emulsion for caring for and/or making up keratin materials comprising microcapsules encapsulating an oily dispersion of at least one reflective agent

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