US20100297039A1 - Oil-In-Water Emulsion Composition And Method For Producing The Same - Google Patents

Oil-In-Water Emulsion Composition And Method For Producing The Same Download PDF

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Publication number
US20100297039A1
US20100297039A1 US12/597,511 US59751108A US2010297039A1 US 20100297039 A1 US20100297039 A1 US 20100297039A1 US 59751108 A US59751108 A US 59751108A US 2010297039 A1 US2010297039 A1 US 2010297039A1
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oil
water
powder
phase
cationic surfactant
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Inventor
Akira Ishikubo
Yuji Matsushita
Yosuke Ikebe
Taizo Fujiyama
Tomonori Toyoda
Kazuho Koiwa
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Shiseido Co Ltd
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Shiseido Co Ltd
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Assigned to SHISEIDO COMPANY LTD. reassignment SHISEIDO COMPANY LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ISHIKUBO, AKIRA, IKEBE, YOSUKE, KOIWA, KAZUHO, FUJIYAMA, TAIZO, MATSUSHITA, YUJI, TOYODA, TOMONORI
Publication of US20100297039A1 publication Critical patent/US20100297039A1/en
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    • 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
    • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
    • A61K8/41—Amines
    • A61K8/416—Quaternary ammonium compounds
    • 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
    • A61K8/04—Dispersions; Emulsions
    • 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
    • A61K8/04—Dispersions; Emulsions
    • A61K8/06—Emulsions
    • 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
    • A61K8/04—Dispersions; Emulsions
    • A61K8/06—Emulsions
    • A61K8/062—Oil-in-water emulsions
    • 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
    • A61K8/27—Zinc; Compounds 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
    • A61K8/84—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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
    • A61Q1/02—Preparations containing skin colorants, e.g. pigments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q17/00—Barrier preparations; Preparations brought into direct contact with the skin for affording protection against external influences, e.g. sunlight, X-rays or other harmful rays, corrosive materials, bacteria or insect stings
    • A61Q17/04—Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations
    • 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
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q5/00—Preparations for care of the hair
    • A61Q5/06—Preparations for styling the hair, e.g. by temporary shaping or colouring
    • 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
    • A61K2800/74—Biological properties of particular ingredients
    • A61K2800/75—Anti-irritant

Definitions

  • the present invention relates to an oil-in-water emulsion composition, and in particular, relates to an oil-in-water emulsion composition that is excellent in emulsion stability and hardly contains a surfactant, and also relates to a method for producing the same.
  • the aqueous component and the oil component are stably mixed by emulsification with an added surfactant.
  • the present invention was made in view of the above-described circumstances, and an object of the invention is to provide an oil-in-water emulsion composition having excellent emulsion stability, low sticky feeling, and low skin irritation; and to provide a simple method for producing the same.
  • the present inventors have diligently studied to achieve the above-described object. As a result, the present inventors have found that an oil-in-water emulsion containing powder, an oil phase component, a water phase component, and a specific amount of a cationic surfactant having two alkyl chains of the length within a certain range, and the components being formed into a specific structure, had excellent emulsion stability, no sticky feeling, and low irritation; thus leading to completion of the present invention.
  • the present inventors have found that the oil-in-water emulsion composition can easily be obtained by integrating the cationic surfactant treatment of the powder and the production process of emulsion composition without a separate powder treatment in the emulsion production.
  • the first embodiment of the present invention is an oil-in-water emulsion composition
  • a powder component comprising (a) 1 to 20 mass % of a powder component, (b) 0.001 to 0.5 mass % of a cationic surfactant having two alkyl chains with 12 or more and 22 or less carbon atoms, (c) an oil phase component, and (d) a water phase component, having a structure wherein (a) powder particles are adsorbed on the oil droplets dispersed in the water phase, and containing substantively no surfactant other than the (b) cationic surfactant.
  • oil-in-water emulsion composition is characterized in that the (b) cationic surfactant is adsorbed on the (a) powder particles.
  • the total amount of the (b) cationic surfactant is 0.001 to 0.1 mass %.
  • the (b) cationic surfactant is a dimethyl dialkyl ammonium chloride.
  • the (d) water phase component comprises one or more selected from the group consisting of succinoglycan, xanthan gum, and acrylamide.
  • the production method of the oil-in-water emulsion composition is characterized by comprising the below-described processes (A) and (B).
  • the second embodiment of the present invention is an external skin preparation for sunscreen comprising the oil-in-water emulsion composition and a hydrophobized powder dispersed in the (c) oil phase component.
  • no water-soluble surfactant is substantively contained other than the (b) cationic surfactant.
  • the hydrophobized powder comprises hydrophobized titanium dioxide fine particles and/or hydrophobized zinc oxide fine particles.
  • the third embodiment of the present invention is a makeup composition comprising the oil-in-water emulsion composition and a hydrophobized powder dispersed in the (c) oil phase component, and 50 mass % or more of the oil phase component being a silicone oil.
  • no water-soluble surfactant is substantively contained other than the (b) cationic surfactant.
  • the hydrophobized fine particles of one or more selected from the group consisting of titanium dioxide, red iron oxide, yellow iron oxide, black iron oxide, and aluminum oxide are contained as the hydrophobized powder.
  • acrylic silicones represented by the below-described general formula (I) are contained.
  • one or more biterminally silicone-modified glycerins represented by the below-described general formula (II) are contained.
  • R1 is a linear or branched alkyl group having 1 to 12 carbon atoms or a phenyl group
  • R2 is an alkylene group having 2 to 11 carbon atoms
  • m is 10 to 120
  • n is 1 to 11.
  • the fourth embodiment of the present invention is a hair styling cosmetic comprising the oil-in-water emulsion composition, and the (c) oil phase component in the oil-in-water emulsion composition comprising 1 to 30 mass % of solid oil and 1 to 30 mass % of liquid oil.
  • no water-soluble surfactant is substantively contained other than the (b) cationic surfactant.
  • the (a) powder component comprises silica.
  • an oil-in-water emulsion composition excellent in emulsion stability can be easily obtained.
  • a highly functional oil-in-water external skin preparation for sunscreen, oil-in-water makeup composition, and hair styling cosmetic can be obtained by blending the composition.
  • FIG. 1 is a phase diagram of dialkyl methyl ammonium chloride in the two-component system with water.
  • FIG. 2 is a graph that shows the measured ⁇ -potential results for the silica-coated titanium oxide powder, which was dispersed in water with dimethyl distearyl ammonium chloride, in the production of an oil-in-water emulsion composition, wherein the blending quantity of dimethyl distearyl ammonium chloride was varied, silica-coated titanium oxide: 3 weight %, oil component: 47 weight %, and water: balance.
  • oil-in-water emulsion composition which is the first embodiment of the present invention, will be described.
  • the oil-in-water emulsion composition of the present invention comprises a specific amount of a cationic surfactant having two alkyl chains of the length within a certain range in addition to an oil phase, water phase, and a powder component, which are components of the conventional Pickering emulsion.
  • the alkyl chains of the two-chain type cationic surfactant in the present invention can be either linear or branched, and they don't need to be identical.
  • Examples of the two-chain type cationic surfactant contained in the oil-in-water emulsion of the present invention include dimethyl dilauryl ammonium chloride, diethyl dilauryl ammonium chloride, dipropyl dilauryl ammonium chloride, dimethyl dipalmityl ammonium chloride, diethyl dipalmityl ammonium chloride, dipropyl dipalmityl ammonium chloride, dimethyl dicetyl ammonium chloride, diethyl dicetyl ammonium chloride, dipropyl dicetyl ammonium chloride, dimethyl distearyl ammonium chloride, diethyl distearyl ammonium chloride, dipropyl distearyl ammonium chloride, dimethyl dibehenyl ammonium chloride, diethy
  • the chain length of alkyl groups in the two-chain type cationic surfactant is preferably 12 to 22. If the chain length is less than 12, there is a problem in the emulsifying power and emulsion stability. If the chain length exceeds 22, a sticky feeling is increased and there is a problem in usability.
  • the chain length of alkyl groups in the two-chain type cationic surfactant is more preferably 16 to 20.
  • dimethyl dialkyl ammonium chloride is especially preferable as the two-chain type cationic surfactant.
  • the blending quantity of the two-chain type cationic surfactant is 0.001 to 0.5 mass % with respect to the total amount of the emulsion, and preferably it is 0.001 to 0.1 mass %. If the blending quantity of the two-chain type cationic surfactant is too much, the composition forms a-gel causing stickiness, and the texture in use tends to decrease.
  • the amount of the surfactant in the vicinity of the above-described blending quantity is too small to function as an emulsifier in an emulsion composition.
  • an excellent emulsion stabilizing ability can be achieved.
  • the irritation is extremely low.
  • Examples of the powder component contained in the oil-in-water emulsion composition of the present invention include inorganic powders (such as talc, kaolin, mica, sericite, muscovite, phlogopite, synthetic mica, red mica, biotite, vermiculite, magnesium carbonate, calcium carbonate, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate, tungsten acid metal salt, magnesium, silica, zeolite, barium sulfate, calcinated calcium sulfate (calcined gypsum), calcium phosphate, fluorine apatite, hydroxyapatite, and ceramic powder), metal soap (such as zinc myristate, calcium palmitate, aluminium stearate), and boron nitride; organic powders (such as titanium dioxide and zinc oxide); inorganic red series pigments (such as iron titanate); inorganic purple series pigments (such as mangoviolet and cobaltviol
  • the powder component may be a composite powder which is prepared by coating powder with metal oxide or a modified powder which is prepared by the surface treatment of the powder with compounds.
  • silica titanium dioxide, zinc oxide, or a composite powder thereof.
  • silica-coated zinc oxide and silica-coated titanium oxide are preferable from the standpoint of affinity of skin, usability, UV-shielding effect, and emulsion stability.
  • the particle size of the powder is not limited in particular. However, the particle size is preferably 1 to 200 nm from the standpoint of handling easiness and emulsion stability when the powder is blended into cosmetics.
  • the blending quantity of the powder component in the oil-in-water emulsion of the present invention is preferably 1 to 20 mass % with respect to the total amount of the oil-in-water emulsion composition, and especially preferably 1 to 10 mass %. If the blending quantity is less than 1 mass %, the emulsification may not proceed satisfactorily. If the blending quantity exceeds 20 mass %, the sticky feeling tends to increase.
  • oil phase components contained in the oil-in-water emulsion composition of the present invention are listed in the following.
  • liquid oil examples include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg oil, sesame oil, persic oil, wheat germ oil, sasanqua oil, castor oil, linseed oil, safflower oil, cottonseed oil, perilla oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, paulownia oil, Japanese tung oil, jojoba oil, germ oil, and triglycerin.
  • solid oil examples include cacao butter, coconut oil, horse fat, hardened coconut oil, palm oil, beef tallow, mutton tallow, hardened beef tallow, palm kernel oil, pork tallow, beef bone tallow, Japan wax kernel oil, hardened oil, heatsfoot oil, Japan wax, and hardened castor oil.
  • wax examples include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, Chinese wax, spermaceti wax, montan wax, rice bran wax, lanolin, kapok wax, lanolin acetate, liquid lanolin, sugar cane wax, isopropyl lanolate, hexyl laurate, reduced lanolin, jojoba wax, hard lanolin, shellac wax, POE lanoline alcohol ether, POE lanoline alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, and POE hydrogenated lanolin alcohol ether.
  • hydrocarbon oil examples include liquid paraffin, ozokerite, squalane, pristane, paraffin, ceresin, squalene, petrolatum, and microcrystalline wax.
  • higher fatty acid examples include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylenic acid, tolic acid, isostearic acid, linoleic acid, linolenic acid, eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA).
  • higher alcohol examples include linear alcohol (such as lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, and cetostearyl alcohol); branched-chain alcohol (such as monostearyl glycerin ether (batylalcohol), 2-decyltetradecynol, lanolin alcohol, cholesterol, phytosterol, hexyldodecanol, isostearyl alcohol, and octyldodecanol).
  • linear alcohol such as lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, and cetostearyl alcohol
  • branched-chain alcohol such as monostearyl glycerin ether (batylalcohol), 2-decyltetradecynol, lanolin alcohol, cholesterol, phytosterol, hexyldodecanol, iso
  • Examples of synthetic ester oil include isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentylglycol dicaprate, diisostearyl malate, glyceryl di-2-heptylundecanoate, trimethylolpropane tri-2-
  • silicone oil examples include linear polysiloxanes (such as dimethylpolysiloxane, methylphenylpolysiloxane, and diphenylpolysiloxane); cyclic polysiloxanes (such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane); silicon resin forming three-dimensional network structure; silicone rubber; various kinds of modified polysiloxane (such as amino modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, and fluorine-modified polysiloxane); and acrylic silicones.
  • linear polysiloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane, and diphenylpolysiloxane
  • cyclic polysiloxanes such as octamethylcyclot
  • water phase components include, besides water, lower alcohol, polyhydric alcohol, and so on.
  • lower alcohol examples include ethanol, propanol, isopropanol, isobutyl alcohol, and t-butyl alcohol.
  • polyhydric alcohol examples include dihydric alcohols (such as ethylene glycol, propylene glycol, trimethylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, tetramethylene glycol, 2,3-butylene glycol, pentamethylene glycol, 2-butene-1,4-diol, hexylene glycol, and octylene glycol); trihydric alcohols (such as glycerin and trimethylolpropane); tetrahydric alcohols (such as pentaerythritol, for example, 1,2,6-hexanetriol); pentahydric alcohols (such as xylitol); hexahydric alcohols (such as sorbitol and mannitol); polyhydric alcohol polymers (such as diethylene glycol, dipropylene glycol, triethylene glycol, polypropylene glycol, tetraethylene glycol, diglycerin, polyethylene glycol, trigly
  • a thickener with salt tolerance as the water phase component, in particular succinoglycan, xanthan gum, or acrylamide.
  • salt tolerance in particular succinoglycan, xanthan gum, or acrylamide.
  • the preferable blending quantity of the thickener is 0.01 to 5 mass % with respect to the total components.
  • the oil-in-water emulsion composition of the present invention comprises the above-described components and forms a so-called Pickering emulsion.
  • a Pickering emulsion is known to be an O/P/W emulsion wherein the oil phase is uniformly dispersed, in the oil-in-water dispersion system, into the water phase by fine particles (powder).
  • the emulsion stability by powder is enhanced by applying a cationic surfactant with a specific structure to such an emulsion.
  • a cationic surfactant having two alkyl chains with 12 or more and 22 or less carbon atoms it is necessary to allow a cationic surfactant having two alkyl chains with 12 or more and 22 or less carbon atoms to be a water dispersion with a lamellar liquid crystal structure.
  • the powder component is also uniformly dispersed in water before emulsification.
  • a powder component and a cationic surfactant are added to water, and a uniform water dispersion containing a lamellar structure and powder can be formed with a homomixer or by ultrasonic wave treatment etc.
  • a powder component and a cationic surfactant may be separately dissolved in respective portions of water, dispersed, and then mixed together. In these processes, other water phase components may be added and mixed.
  • the cationic surfactant having two alkyl chains with 12 or more and 22 or less carbon atoms used in the present invention forms a lamellar liquid crystal structure in water, wherein lipophilic groups are associated in wide concentration and temperature ranges.
  • dialkyl methyl ammonium chloride in the two-component system with water is known to take a liquid crystal structure, as shown in FIG. 1 , at a low concentration.
  • the cationic surfactant is in the state that corresponds to the water/liquid crystal stable dispersion in FIG. 1 , namely, the state in which small lamellar structures of the cationic surfactant are dispersed in water.
  • FIG. 2 shows the measured ⁇ -potential results for the silica-coated titanium oxide powder, which was dispersed in water with dimethyl distearyl ammonium chloride, in the production of an oil-in-water emulsion composition, wherein the blending quantity of dimethyl distearyl ammonium chloride was varied, silica-coated titanium oxide: 3 weight %, oil component: 47 weight %, and water: balance.
  • the ⁇ -potential which is the surface potential of powder, shifts to the positive direction with an increase in the cationic surfactant concentration.
  • dimethyl distearyl ammonium chloride having a cationic group is adsorbed on the powder surface. From FIG.
  • the adsorbed amount increases with an increase in the blended cationic surfactant against powder.
  • the blending quantity is too high, the inversion to the water-in-oil may take place during emulsification.
  • the blending ratio of a specific cationic surfactant to the powder component is preferably in the vicinity of 5:0.001 to 5:1 though it depends upon other formulation components.
  • the oil-in-water emulsion composition of the present invention can be obtained by adding an oil phase component to the dispersion of the obtained powder particles, on which a cationic surfactant is adsorbed, and by emulsifying with an emulsifying machine etc.
  • the addition of the oil phase component may be carried out under heating as necessary.
  • a treatment such as fragmentation may be carried out beforehand.
  • the present invention can be thought to be an O/P/W emulsion, wherein an oil phase is uniformly dispersed into the water phase with the help of fine particles on which a specific cationic surfactant is adsorbed.
  • the added oil component enters into the association sites of lipophilic groups of a lamellar liquid crystal that is adsorbed on the powder, and the oil droplets, on which powder particles are adsorbed, are formed at the interface with the water phase.
  • the powder adsorption on the oil droplets is enhanced by the action of the specific cationic surfactant.
  • a composition more excellent in emulsion stability than the conventional O/P/W emulsion, wherein oil droplets are dispersed only by the adsorption power of the powder is presumably obtained.
  • the powder particles are adsorbed on the oil droplets that are dispersed in the water phase, and a structure, wherein a cationic surfactant is adsorbed on the powder particles, is formed.
  • a specific cationic surfactant of a liquid crystalline state is adsorbed on the powder before the emulsification of the water phase and the oil phase.
  • a satisfactory improvement in the emulsion state and emulsion stability cannot be achieved by the addition of the cationic surfactant during or after emulsification.
  • oil-in-water emulsion composition of the present invention from the standpoint of lowering irritation properties, it is desirable that no surfactant is substantively contained other than the cationic active agent, which is an essential component, with a specific structure.
  • a sufficiently stable emulsion composition can be obtained by blending a small amount of a specific cationic surfactant, which contributes to the stability of powder emulsification. Therefore, it is not necessary to blend another surfactant as an emulsifier.
  • not substantively contained means that “not contained at all” or the content is a trace amount and it has no effect on the present invention.
  • the components normally used in cosmetics and quasi-drugs can be blended in addition to the above-described components so far as the effect of the present invention is not undermined, and the production can be carried out according to the normal method.
  • moisturizers examples include moisturizers, monosaccharides, oligosaccharides, organic amines, UV absorbers, antioxidants, antiseptics (such as ethyl paraben and butyl paraben), whitening agents (such as saxifraga sarmentosa extract, arbutins, tranexamic acids, and potassium 4-methoxysalicylate), various extracts (such as Zingiber officinale, phellodendron bark, goldthread, lithospermum root, birch, loquat, carrot, aloe, malva sylvestris (mallow), iris, vitis vinifera (grape), luffa cylindrica, lily, saffron, cnidium officinale, ginger, hypericum perforatum, ononis spinosa, allium sativum (gerlic), capsicum frutescen
  • moisturizer examples include chondroitin sulfate, hyaluronic acid, mucoitin sulfate, charonin acid, atelocollagen, cholesteryl 12-hydroxystearate, sodium lactate, bile acid salts, dl-pyrrolidonecarboxylic acid salts, short-chain soluble collagen, diglycerol (EO) PO adducts, chestnut rose ( R. roxburghii plena ) extract, yarrow ( Achillea millefolium ) extract, and melilot extract in addition to the aforementioned polyhydric alcohols.
  • EO diglycerol
  • monosaccharide examples include trioses (such as D-glycerylaldehyde and dihydroxyacetone); tetroses (such as D-erythrose, D-erythrulose, D-threose, and erythritol); pentoses (such as L-arabinose, D-xylose, L-lyxose, D-arabinose, D-ribose, D-riburose, D-xylulose, and L-xylulose); hexoses (such as D-glucose, D-talose, D-psicose, D-galactose, D-fructose, L-galactose, L-mannose, and D-tagatose); heptoses (such as aldoheptose and heptulose); octoses (such as octulose); deoxysugars (such as 2-deoxy-D-ribose,
  • oligosaccharide examples include sucrose, gentianose, umbelliferose, lactose, planteose, isolychnoses, ⁇ , ⁇ -threhalose, raffinose, lychnoses, umbilicin, and stachyose verbascoses.
  • amino acid examples include neutral amino acids (such as threonine and cysteine); acidic amino acids (such as hydroxylysine).
  • amino acid derivative examples include sodium acylsarcosinate (sodium lauroylsarcosinate), acylglutamic acid salt, sodium acyl- ⁇ -alanine, glutathione, and pyrrolidonecarboxylic acid.
  • organic amine examples include monoethanolamine, diethanolamine, triethanolamine, morpholine, triisopropanolamine, 2-amino-2-methyl-1,3-propanediol, and 2-amino-2-methyl-1-propanol.
  • organic UV absorber examples include benzoic acid UV absorbers (such as p-aminobenzoic acid (hereinafter abbreviated as “PABA”), PABA monoglycerin ester, N,N-dipropoxy PABA ethyl ester, N,N-diethoxy PABA ethyl ester, N,N-dimethyl PABA butyl ester, and N,N-dimethyl PABA ethyl ester); anthranilic acid UV absorbers (such as homomenthyl-N-acetyl anthranilate); salicylic acid UV absorbers (such as amyl salicylate, menthyl salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, and p-isopropanol phenyl salicylate); cinnamic acid UV absorbers (such as octyl cinnam
  • inorganic UV absorber examples include titanium oxide, zinc oxide, iron oxide, cerium oxide, or composite powder containing thereof.
  • antioxidant aid examples include phosphoric acid, citric acid, ascorbic acid, maleic acid, malonic acid, succinic acid, fumaric acid, cephalin, hexametaphosphates, phytic acid, and ethylenediaminetetraacetic acid.
  • the formulation of the oil-in-water emulsion composition of the present invention is not specified, and the formulation can be suitably selected depending upon the formulation components and the intended use, for example, lotion, milky lotion, cream, or gel.
  • an oily organic UV protection agent and a powderly inorganic UV protection agent are blended in the base. From the standpoint that these UV protection agents are blended in large amounts, a water-in-oil emulsion composition is widely used as the base.
  • An external skin preparation of such a configuration has an unpleasant oily feeling, and a powdery feeling is also strong; thus good texture in use may not be achieved.
  • an oil-in-water emulsion composition is used as the base, an external skin preparation with a refreshing feeling and light feeling can be obtained because of the composition characteristics.
  • an external skin preparation with a refreshing feeling and light feeling can be obtained because of the composition characteristics.
  • the conventional oil-in-water external skin preparation for sunscreen is inferior, in water resistance, to that of the water-in-oil and it tends to be removed by sweat and sebum.
  • the present inventors further investigated the properties of the oil-in-water emulsion composition of the present invention and found that an oil-in-water external skin preparation for sunscreen that is excellent in the emulsion stability and low in the frictional feeling could be obtained by blending the above composition.
  • the components in the oil-in-water emulsion composition, which is blended in the external skin preparation for sunscreen of the present invention, are as described above.
  • the external skin preparation for sunscreen of the present invention is prepared by dispersing a hydrophobized powder in the oil phase component in the oil-in-water emulsion composition.
  • hydrophobized powder to be dispersed in the oil phase component examples include a hydrophobized powder which is prepared by hydrophobizing the surface of inorganic powder particle in a wet method using solvent, a gas phase method, or a mechanochemical method with silicones such as methylhydrogenpolysiloxane and dimethylpolysiloxane; dextrin fatty acid ester; higher fatty acid; higher alcohol; fatty acid ester; metallic soap; alkyl phosphate ether; fluorine compound; or hydrocarbons such as squalane and paraffin; or a hydrophobized powder which is prepared by coating inorganic powder particle with silica and then hydrophobizing it with alkyl-modified silane coupling agent and so on.
  • silicones such as methylhydrogenpolysiloxane and dimethylpolysiloxane
  • dextrin fatty acid ester higher fatty acid
  • higher alcohol higher alcohol
  • fatty acid ester metallic soap
  • Examples of the inorganic powder particle which is hydrophobized as mentioned above include titanium oxide, zinc oxide, talc, mica, sericite, kaolin, titanated mica, black iron oxide, yellow iron oxide, red iron oxide, ultramarine, Prussian blue, chromium oxide, and chromium hydroxide.
  • particularly hydrophobized fine titanium dioxide and/or hydrophobized fine zinc oxide is preferably contained.
  • the average particle size is smaller than the size of oil phase emulsified particles.
  • the hydrophobized powder is used as a UV scattering agent in the external skin preparation for sunscreen of the present invention, it is preferable to use the powder with the average particle size of 100 nm or less.
  • the external skin preparation for sunscreen of the present invention can be produced, with the use of the above-described essential components and other optional components, according to the above-described production method of the oil-in-water emulsion composition of the present invention.
  • the desired external skin preparation for sunscreen can be obtained by adding a powder component and a specific cationic surfactant to a portion of water, mixing them under heating, adding and mixing the rest of water and water phase components, and adding and mixing, under heating, the oil phase component which has been beforehand dissolved by heating and dispersed the hydrophobic powder by stirring.
  • the formulation can be suitably selected depending upon the formulation components and the intended use, for example, lotion, milky lotion, cream, or gel.
  • the third embodiment of the present invention is a makeup composition.
  • the oil-in-water emulsion composition provides a fresh and light feeling in use; thus it is preferred for cosmetics such as milky lotion, cream, and emulsion-type foundation.
  • silicone oil is widely used.
  • the oil solution with a high rate of silicone oil which has low compatibility with other oil components such as hydrocarbons, some ingenuity was necessary in the selection of the best surfactant, and it was difficult to stably emulsify the oil solution.
  • a silicone surfactant is used for the emulsification of silicone oil, a large blending quantity was necessary for stabilization, and there was an issue in that a sticky feeling is generated for the composition because of the surfactant.
  • the present inventors further investigated the properties of the above-described oil-in-water emulsion composition of the present invention.
  • the present inventors found that an oil-in-water makeup composition excellent in emulsion stability and with a low sticky feeling could be obtained by blending the composition of the invention.
  • the makeup composition of the present invention is prepared by dispersing a hydrophobized powder into the oil phase component in the oil-in-water emulsion composition.
  • hydrophobized powder to be dispersed in the oil phase components examples include a hydrophobized powder which is prepared by hydrophobizing the surface of inorganic powder particle in a wet method using solvent, a gas phase method, or a mechanochemical method with silicones such as methylhydrogenpolysiloxane and dimethylpolysiloxane; dextrin fatty acid ester; higher fatty acid; higher alcohol; fatty acid ester; metallic soap; alkyl phosphate ether; fluorine compound; or hydrocarbons such as squalane or paraffin; or a hydrophobized powder which is prepared by coating inorganic powder particle with silica and then hydrophobizing it with alkyl-modified silane coupling agent and so on.
  • silicones such as methylhydrogenpolysiloxane and dimethylpolysiloxane
  • dextrin fatty acid ester higher fatty acid; higher alcohol; fatty acid ester
  • metallic soap alkyl phosphate ether
  • Examples of the inorganic powder particle which is hydrophobized as mentioned above include titanium oxide, zinc oxide, talc, mica, sericite, kaolin, titanated mica, black iron oxide, yellow iron oxide, red iron oxide, ultramarine, Prussian blue, chromium oxide, and chromium hydroxide.
  • particularly hydrophobized particulate titanium dioxide, red iron oxide, yellow iron oxide, black iron oxide and/or aluminum oxide is preferably contained.
  • Such a hydrophobized powder has high water resistance against sebum, sweat, etc. and is long-lasting. Therefore, a composition with a good feeling upon application and excellent characteristics after application can be obtained by dispersing the hydrophobized powder into the oil phase component in the oil-in-water emulsion composition.
  • the average particle size is smaller than the size of oil phase emulsified particles.
  • the powder in the makeup composition of the present invention, it is preferable to use the powder with an average particle size of 100 nm or less.
  • the makeup composition of the present invention contains 50 mass % or more silicone oil, with respect to the oil phase component, in the oil-in-water emulsion composition, which is the essential component.
  • linear polysiloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane, and diphenylpolysiloxane
  • cyclic polysiloxanes
  • R is an alkyl group having 10 to 20 carbon atoms.
  • a+b+c 1, all a, b, c are 0.2 or higher, and d is an integer of 5 to 100.
  • R1 is a linear or branched alkyl group having 1 to 12 carbon atoms or a phenyl group
  • R2 is an alkylene group having 2 to 11 carbon atoms
  • m is 10 to 120 and n is 1 to 11.
  • oils usually used in cosmetics such as liquid oil, waxes, hydrocarbon oil, higher fatty acid, higher alcohol, and synthetic ester oil, may be blended in addition to a specific amount of silicone oil.
  • the makeup composition of the present invention can be produced, with the use of the above-described essential components and other optional components, according to the above-described production method of the oil-in-water emulsion composition of the present invention.
  • the desired makeup composition can be obtained by adding a powder component and a specific cationic surfactant to a portion of water, mixing them under heating, adding and mixing the rest of water and water phase components, and adding and mixing, under heating, the oil phase component which has been beforehand dissolved by heating and dispersed the hydrophobic powder by stirring.
  • the formulation can be suitably selected depending upon the formulation components and the intended use, for example, lotion, milky lotion, cream, or gel.
  • the fourth embodiment of the present invention is a hair styling cosmetic.
  • the present inventors further investigated the properties of the above-described oil-in-water emulsion composition of the present invention.
  • the present inventors found that a hair styling cosmetic excellent in emulsion stability, hair styling power, and moisture resistance, and with a low sticky feeling could be obtained by blending the composition of the invention.
  • the solid oil indicates solid oil (at room temperature) components generally used in cosmetics.
  • the oil include solid oils such as cacao butter, coconut oil, horse fat, hardened coconut oil, palm oil, beef tallow, mutton tallow, hardened beef tallow, palm kernel oil, pork tallow, beef bone tallow, Japan wax kernel oil, hardened oil, heatsfoot oil, Japan wax, and hardened castor oil; waxes such as beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, Chinese wax, spermaceti wax, montan wax, rice bran wax, lanolin, kapok wax, lanolin acetate, sugar cane wax, isopropyl lanolate, hexyl laurate, reduced lanolin, jojoba wax, hard lanolin, shellac wax, POE lanoline alcohol ether, POE lanoline alcohol acetate, POE cholesterol ether, and POE hydrogenated lanolin alcohol
  • the blending quantity of the solid oil in the present invention is preferably 1 to 30 mass % of the total hair styling cosmetic, and more preferably 2 to 15 mass %. If the blending quantity of the solid oil is less than 1 mass %, the hair styling power may not be satisfactory. If the blending quantity exceeds 30 mass %, the stickiness may be caused.
  • the liquid oil used in the present invention indicates liquid oil (at room temperature) components generally used in cosmetics.
  • examples of such oil include liquid oils such as avocado oil, evening primrose oil, camellia oil, turtle oil, macadamia nut oil, sunflower oil, almond oil, corn oil, mink oil, olive oil, rapeseed oil, egg oil, sesame oil, persic oil, wheat germ oil, sasanqua oil, castor oil, linseed oil, safflower oil, cottonseed oil, perilla oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, paulownia oil, Japanese tung oil, jojoba oil, and germ oil; ester oils such as cetyl octanoate, cetyl 2-ethylhexanoate, hexyldecyl dimethyloctanoate, ethyl laurate, hexyl laurate, isopropyl myristate, 2-he
  • octamethylcyclotetrasiloxane decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane
  • modified polysiloxanes e.g., amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, and fluorine-modified polysiloxane.
  • One of these oils can be used alone or two or more of them can be used in combination.
  • the blending quantity of the liquid oil in the hair styling cosmetic of the present invention is preferably 1 to 30 mass % with respect to the total components, and more preferably 5 to 20 mass %. If the blending quantity of the liquid oil is less than 1 mass %, the hair styling power may not be satisfactory. If the blending quantity exceeds 30 mass %, the stickiness may be caused.
  • the hair styling cosmetic of the present invention it is preferable to blend silica, titanium dioxide, zinc oxide, or a composite powder thereof as the powder component, which is an essential component in the oil-in-water emulsion composition.
  • silica is preferable because it has transparency and it does not turn white after application.
  • the particle size of the powder is not limited in particular. However, the particle size is preferably 1 to 100 nm from the standpoint of handling easiness and emulsion stability when the powder is blended into cosmetics.
  • the hair styling cosmetic of the present invention can be produced, with the use of the above-described essential components and other optional components, according to the above-described production method of the oil-in-water emulsion composition of the present invention.
  • the desired hair styling cosmetic can be obtained by adding a powder component and a specific cationic surfactant to a portion of water, mixing them under heating, adding and mixing the rest of water and water phase components, and adding and mixing, under heating, the oil phase component containing beforehand-dissolved solid oil and liquid oil.
  • the formulation can be suitably selected depending upon the formulation components and the intended use, for example, lotion, milky lotion, cream, or gel.
  • mass % or “%”, which represents the blending quantity, indicates mass % with respect to the total amount of the composition unless otherwise noted.
  • the appearance of the emulsion was observed by the naked eye within 1 day of the preparation of the emulsion.
  • Emulsified particles were uniform, and the coalescence or aggregation was not observed.
  • Emulsified particles were nearly uniform; however, slight coalescence or aggregation was observed.
  • Emulsified particles were not uniform, and significant coalescence or aggregation was observed.
  • a 24-hour occlusive patch test was performed on the medial side of the upper arm of 10 panelists, and the average value was calculated based on the following criteria.
  • ⁇ The average value of 10 panelists was 0 or higher and less than 0.15.
  • ⁇ The average value of 10 panelists was 0.2 or higher and less than 0.3.
  • the actual usage test of each sample was performed by 10 professional panelists.
  • the evaluation criteria were as follows.
  • Oil-in-water emulsions having the blending compositions listed in Table 1 were produced by the below-described method. The above-described evaluation tests (1) to (4) were performed for each sample.
  • Glycerin and succinoglycan which are water phase components
  • silica-coated zinc oxide which is a powder component
  • trimethyl stearyl ammonium chloride or dimethyl distearyl ammonium chloride that had been separately dispersed in purified water was added, and the ultrasonic wave treatment under heating was carried out.
  • the powder component was uniformly dispersed, the remaining oil phase component was added and mixed with a mixer until it became uniform, and an oil-in-water emulsion composition was obtained.
  • Test Example 1 As seen from Table 1, in Test Example 1, wherein only powder was blended, the emulsification was significantly poor. In Test Example 2, wherein a small amount of single-chain cationic active agent was added, the emulsification was improved. However, the skin irritation was high, and the sticky feeling tended to be high. In contrast, in Test Example 3, wherein a cationic active agent having two long alkyl chains is added, the emulsification, skin irritation, and sticky feeling were all good.
  • the oil-in-water emulsions having the blending compositions listed in Table 2 were produced by the conventional method.
  • the above-described evaluation tests (1) to (4) were performed for each sample.
  • Glycerin and succinoglycan which are water phase components
  • silica-coated zinc oxide which is a powder component
  • dimethyl distearyl ammonium chloride that had been separately dispersed in purified water was added, and the ultrasonic wave treatment under heating was carried out. After the powder component was uniformly dispersed, the remaining oil phase component was added and mixed with a mixer until it became uniform, and an oil-in-water emulsion composition was obtained.
  • the blending quantity of powder is 1 to 20 mass % with respect to the total amount of the emulsion.
  • the oil-in-water emulsions having the blending compositions listed in Table 3 were produced by the conventional method.
  • the above-described evaluation tests (1) to (4) were performed for each sample.
  • Glycerin and succinoglycan which are water phase components
  • silica-coated zinc oxide which is a powder component
  • dimethyl distearyl ammonium chloride that had been separately dispersed in purified water was added, and the ultrasonic wave treatment under heating was carried out. After the powder component was uniformly dispersed, the remaining oil phase component was added and mixed with a mixer until it became uniform, and an oil-in-water emulsion composition was obtained.
  • the emulsions showed excellent emulsion stability, low sticky feeling, and low skin irritation.
  • Test Example 9 wherein 0.0005 mass % of a cationic surfactant was blended, the emulsion had poor emulsification.
  • Test Example 13 wherein 1 mass % of cationic surfactant was blended, had somewhat high skin irritation, and the sticky feeling was strong.
  • the blending quantity of the cationic surfactant is 0.001 to 0.5 mass % with respect to the total amount of the emulsion.
  • oil-in-water emulsions having the blending compositions listed in Table 4 were produced by the conventional method.
  • the above-described evaluation tests (1) to (4) were performed for each sample.
  • Glycerin and succinoglycan which are water phase components
  • silica-coated zinc oxide which is a powder component
  • dimethyl distearyl ammonium chloride that had been separately dispersed in purified water was added, and the ultrasonic wave treatment under heating was carried out. After the powder component was uniformly dispersed, the remaining oil phase component was added and mixed with a mixer until it became uniform, and an oil-in-water emulsion composition was obtained.
  • the length of two alkyl chains of the cationic active agent is 12 to 22.
  • the time-dependent change of emulsion stability of the oil-in-water emulsion composition was evaluated by blending succinoglycan, xanthan gum, or acrylamide.
  • the evaluation method was as follows.
  • the oil-in-water emulsion compositions having the blending compositions listed in Table 5 were produced. One month after the production, the emulsion appearance, of the composition of each test example, was observed by the naked eye.
  • Glycerin and succinoglycan, xanthan gum, acrylamide, or a polyacrylic acid salt, which are water phase components, and silica-coated zinc oxide, which is a powder component, were added to purified water and mixed.
  • dimethyl distearyl ammonium chloride that had been separately dispersed in purified water was added, and the ultrasonic wave treatment under heating was carried out.
  • the powder component was uniformly dispersed, the remaining oil phase component was added and mixed with a mixer until it became uniform, and an oil-in-water emulsion composition was obtained.
  • Test Examples 18 to 20 wherein succinoglycan, xanthan gum, or acrylamide was blended, a stable emulsion appearance was maintained over a long period.
  • Test Example 21 wherein some other thickener was blended
  • Test Example 22 wherein no thickener is blended, became slightly less stable over time.
  • oil-in-water emulsion composition of the present invention it is preferable to blend one or more selected from the group consisting of succinoglycan, xanthan gum, and acrylamide.
  • the production method of the oil-in-water emulsion composition of the present invention was investigated. According to the below-described respective production methods, the emulsion compositions having formulations shown in Table 6 were produced, and the emulsion state was evaluated. The results are shown in Table 7.
  • a water phase component, a powder component that was uniformly dispersed in a portion of purified water, and a surfactant component that was uniformly dispersed in the remaining purified water were mixed, and the ultrasonic wave treatment was carried out under heating at 70° C.
  • an oil phase component that was heated to 70° C. was added, and the composition was obtained by the emulsification with an emulsifying machine.
  • a water phase component and a powder component were mixed in purified water, and the ultrasonic wave treatment was carried out under heating at 70° C.
  • an oil phase component that was heated to 70° C. and a surfactant component were added, and the emulsification was carried out with an emulsifying machine.
  • a powder component and a surfactant component were stirred in a suitable amount of ethanol; then the surfactant treated powder was obtained by evaporating ethanol.
  • the powder and a water phase component were mixed in purified water, and the ultrasonic wave treatment was carried out under heating at 70° C.
  • an oil phase component that was heated to 70° C. was added, and the composition was obtained by the emulsification with an emulsifying machine.
  • the appearance of the emulsion was observed by the naked eye within 1 day of the preparation of the emulsion.
  • Emulsified particles were uniform, and the coalescence or aggregation was not observed.
  • Emulsified particles were nearly uniform; however, slight coalescence or aggregation was observed.
  • Emulsified particles were not uniform, and significant coalescence or aggregation was observed.
  • Test Example 23 wherein a specific cationic surfactant dispersed in water was mixed with a powder component and the emulsification with an oil phase component was subsequently carried out, showed excellent emulsion stability.
  • Example 24 wherein a cationic surfactant was added, without going through the above process, at the time of emulsification of a water phase and an oil phase, a stable emulsion could not be obtained, and the coalescence or aggregation of oil droplets or powder was observed.
  • Test Example 25 wherein a separate treatment was carried out in ethanol instead of the treatment of powder and a cationic surfactant in water, the emulsion stability was poor.
  • the emulsion stability was evaluated for the composition obtained by mixing 50 parts by weight of the surface-treated-powder dispersion liquid, which was obtained by each method described below, and 50 parts by weight of the oil phase component (liquid paraffin) under heating at 70° C.
  • glyceryl monostearate Into 100 parts by weight of water, 0.1 parts by weight of glyceryl monostearate was uniformly dispersed, 6 parts by weight of silica-coated zinc oxide was added and dispersed, and ultrasonic wave treatment was carried out under heating.
  • an O/P/W emulsion composition excellent in stability could be obtained by treating the powder with dimethyl distearyl ammonium chloride in water and carrying out the powder emulsification of the oil phase component with the use of the obtained dispersion liquid of the treated powder.
  • the powder treatment with stearic acid which is a common hydrophobizing agent of powder, was carried out in ethanol because the treatment in water is difficult because of its properties (Test Example 27). Therefore, the emulsification could not be carried out for the dispersion of the treated powder, as it is, and the oil phase component.
  • the treated powder was redispersed in water and the emulsification was tried. As a result, it was found that the powder emulsification was possible; however, the emulsion stability of the obtained composition was inferior to that of Test Example 26.
  • Test Example 28 it was possible to form treated powder in water with the use of glyceryl monostearate and to carry out the powder emulsification with the use of the dispersion liquid. However, the emulsion stability of the obtained composition was inferior to that of Test Example 26.
  • the oil-in-water emulsion composition of the present invention by using a cationic surfactant having two long-chain alkyl groups as the treatment agent of the powder, which is involved in emulsification, treating the powder in water, and mixing the dispersion liquid of the obtained treated powder, as it is, and the oil phase component. That is, in the production of the oil-in-water emulsion composition of the present invention, it is possible to carry out, easily and continuously, the operations starting from the surface treatment of the powder to the emulsification with the powder by using a cationic surfactant having a specific structure as the powder treatment agent, and the emulsion stability is high.
  • oil-in-water emulsion composition of the present invention are listed. However, the present invention is not limited to these examples. All the oil-in-water emulsion compositions obtained in the below-described formulation examples had high emulsion stability, a low sticky feeling, and low skin irritation.
  • a milky lotion was obtained by heating Phase B to 70° C., dispersing sufficiently with a mixer or by ultrasonic wave, adding phase C, adding phase A and emulsifying with an emulsifying machine, and lastly adding phase D.
  • Phase B was heated to 70° C. and dispersed with a mixer or by ultrasonic wave. Subsequently, uniformly dissolved phase C was added to this. Phase A heated to 70° C. was added to phase B heated to 70° C., and the emulsification was carried out with an emulsifying machine. This was cooled and a milky lotion was obtained.
  • Phase B was heated to 70° C. and sufficiently dispersed with an emulsifying machine, subsequently heated phase A was added, and the emulsification was carried out with an emulsifying machine. Lastly Phase C was added, and a foundation was obtained by cooling the emulsion with a heat exchanger.
  • mass % or “%”, which represents the blending quantity, indicates mass % with respect to the total amount of the composition unless otherwise noted.
  • Emulsified particles were uniform, and the coalescence or aggregation was not observed.
  • Emulsified particles were nearly uniform; however, slight coalescence or aggregation was observed.
  • Emulsified particles were not uniform, and significant coalescence or aggregation was observed.
  • sample was placed in 50 mL sample tube (diameter: 3 cm), the tube was rotated at 45 rpm for 4 hours at room temperature, and the emulsion stability was evaluated under a microscope.
  • the evaluation criteria were as follows.
  • Emulsified particles were uniform and coalescence was not observed.
  • Emulsified particles were nearly uniform; however, slight coalescence was observed.
  • Emulsified particles were not uniform and significant coalescence was observed.
  • the actual usage test by 10 professional panelists was performed for the presence or absence of frictional feeling after the use of each sample.
  • the evaluation criteria were as follows.
  • the actual usage test of each sample was performed by 10 professional panelists.
  • the evaluation criteria were as follows.
  • Phase A was heated to 70° C. and was dispersed by ultrasonic wave, and uniformly dissolved phase B was added.
  • Phase C heated to 70° C. was added to phase B heated to 70° C., the emulsification was carried out with an emulsifying machine, and then emulsion was cooled to room temperature.
  • Test Example 29 wherein the powder was used without blending a cationic surfactant, the emulsification was significantly poor.
  • Test Example 30 wherein only a single-chain cationic surfactant was added, a decrease in the rotation emulsion stability was observed.
  • Test Example 31 wherein a cationic surfactant having two long alkyl chains was added, excellent results in all items were shown.
  • Test Example 32 wherein a powder component (silica-coated zinc oxide) was not blended, the emulsion stability was significantly poorer compared with that of Test Example 31.
  • Test Example 33 wherein a hydrophobized powder is not contained in the oil phase, a frictional feeling was present after use, and the stickiness tends to be present upon application.
  • Test Example 34 wherein hydrophilic titanium dioxide instead of the hydrophobized powder was blended, a significant frictional feeling and sticky feeling were present.
  • the excellent emulsion stability could be provided to the external skin preparation for sunscreen of the present invention by including an oil-in-water emulsion composition containing (a) a powder component, (b) a cationic surfactant having two alkyl chains with 12 or more and 22 or less carbon atoms, (c) an oil phase component, and (d) a water phase component.
  • an oil-in-water emulsion composition containing (a) a powder component, (b) a cationic surfactant having two alkyl chains with 12 or more and 22 or less carbon atoms, (c) an oil phase component, and (d) a water phase component.
  • the frictional feeling after use and the sticky feeling during application can be improved by blending a hydrophobized powder in the oil phase component.
  • the water resistance of the external skin preparation for sunscreen was evaluated with respect to the blending quantity of surfactant.
  • the evaluation method was as follows.
  • the amount of the external preparation on the skin immediately after a sample was applied on the arm of 10 panelists and the amount after washing the arm with a specific amount of running water were determined by the extraction with ethanol.
  • the residual rate (%) was calculated by the following equation.
  • Residual rate (%) (amount of external preparation on the skin after washing with water)/(amount of external preparation on the skin before washing with water) ⁇ 100
  • the residual rate is 90% or higher.
  • the residual rate is 60% or higher and less than 90%.
  • the residual rate is 30% or higher and less than 60%.
  • the residual rate is less than 30%.
  • Phase A was heated to 70° C. and was dispersed by ultrasonic wave, and uniformly dissolved phase B was added.
  • Phase C heated to 70° C. was added to phase B heated to 70° C., the emulsification was carried out with an emulsifying machine, and then emulsion was cooled to room temperature.
  • the sample of Test Example 35 wherein no surfactant other than a specific cationic surfactant is contained, was excellent in water resistance.
  • a water-soluble surfactant other than the specific cationic surfactant is used in combination, it was possible to maintain water resistance if the amount was extremely small (Test Example 36).
  • the water resistance had a trend to decrease with an increase in the blending quantity of a water-soluble surfactant used in combination.
  • no water-soluble surfactant is substantively contained other than (b) a cationic surfactant having two alkyl chains with 12 or more and 22 or less carbon atoms.
  • oil-in-water external skin preparations for sunscreen having the blending compositions listed in Table 11 were produced, and the above-described evaluation tests (1) to (4) were performed for each sample.
  • Phase A was heated to 70° C. and was dispersed by ultrasonic wave, and uniformly dissolved phase B was added.
  • Phase C heated to 70° C. was added to phase B heated to 70° C., the emulsification was carried out with an emulsifying machine, and then emulsion was cooled to room temperature.
  • Test Examples 41 to 43 had excellent emulsion stability, and a frictional feeling and sticky feeling were nearly absent.
  • Test Example 40 wherein 0.5 mass % of powder was blended, had poor emulsion stability.
  • Example 44 wherein 30 mass % of powder was blended, a strong frictional feeling and sticky feeling were present.
  • the blending quantity of powder is 1 to 20 mass % with respect to the total amount of an external preparation.
  • oil-in-water external skin preparations for sunscreen having the blending compositions listed in Table 12 were produced, and the above-described evaluation tests (1) to (4) were performed for each sample.
  • Phase A was heated to 70° C. and was dispersed by ultrasonic wave, and uniformly dissolved phase B was added.
  • Phase C heated to 70° C. was added to phase B heated to 70° C., the emulsification was carried out with an emulsifying machine, and then emulsion was cooled to room temperature.
  • Example 45 wherein 0.0005 mass % of a cationic surfactant was blended
  • Example 49 wherein 1 mass % of a cationic surfactant was blended
  • the blending quantity of a cationic surfactant having two alkyl chains with 12 or more and 22 or less carbon atoms is 0.001 to 0.5 mass % with respect to the amount of total components.
  • Phase A was heated to 70 ° C. and was dispersed by ultrasonic wave, and uniformly dissolved phase B was added.
  • Phase C heated to 70° C. was added to phase B heated to 70° C., the emulsification was carried out with an emulsifying machine, and then emulsion was cooled to room temperature.
  • Example 50 wherein a cationic surfactant with a chain length of 10 was blended, was poor in emulsion stability.
  • a cationic surfactant with a chain length of 22 or higher was blended, as in Test Example 53, the emulsion stability during rotation decreased, and the frictional feeling and sticky feeling increased.
  • the length of two alkyl chains of the cationic surfactant is preferably 12 to 22.
  • a milky lotion was obtained by heating Phase B to 70° C., dispersing sufficiently with a mixer or by ultrasonic wave, adding phase C, adding phase A and emulsifying with an emulsifying machine, and lastly adding phase D.
  • Phase B was heated to 70° C. and dispersed with a mixer or by ultrasonic wave. Subsequently, uniformly dissolved phase C was added to this. Phase A heated to 70° C. was added to phase B heated to 70° C., and the emulsification was carried out with an emulsifying machine. This was cooled and a milky lotion was obtained.
  • Phase B was heated to 70° C. and sufficiently dispersed with an emulsifying machine, subsequently heated phase A was added, and the emulsification was carried out with an emulsifying machine. Lastly Phase C was added, and a foundation was obtained by cooling the emulsion with a heat exchanger.
  • mass % or “%”, which represents the blending quantity, indicates mass % with respect to the total amount of the composition unless otherwise noted.
  • the actual usage test by 10 professional panelists was performed for the presence or absence of a sticky feeling after the use of the sample.
  • the evaluation criteria were as follows.
  • the actual usage test of each sample was performed by 10 professional panelists.
  • the evaluation criteria were as follows.
  • ⁇ 8 or more panelists acknowledged a refreshing feeling upon application.
  • ⁇ 3 or more and less than 6 panelists acknowledged a refreshing feeling upon application.
  • Oil-in-water makeup compositions having the blending compositions listed in Table 14 were produced, and the above-described evaluations (1) to (3) were performed for each sample.
  • Phase A was heated to 70° C. and dispersed by ultrasonic wave treatment.
  • Phase B was added to this, the mixture was emulsified with an emulsifying machine, and then it was cooled.
  • Test Example 54 wherein a cationic surfactant was not contained and only a hydrophilic powder was blended
  • Test Example 55 wherein only a cationic surfactant was blended
  • the emulsification was significantly poor.
  • Test Example 56 wherein both a cationic surfactant and a hydrophilic powder were blended, the formulation stability, non-stickiness, and a refreshing feeling were all good.
  • Test Example 57 The composition of Test Example 57, wherein a hydrocarbon-based surfactant was used for emulsification, had poor formulation stability, a sticky feeling was present, and a refreshing feeling was absent.
  • Test Example 58 wherein a silicone surfactant was used, the formulation stability improved compared with the case of hydrocarbon-based surfactant. However, it was still poor in the sticky feeling and refreshing feeling.
  • the excellent emulsion stability could be provided to the makeup composition of the present invention by including an oil-in-water emulsion composition containing (a) a powder component, (b) a cationic surfactant having two alkyl chains with 12 or more and 22 or less carbon atoms, (c) an oil phase component, and (d) a water phase component.
  • an oil-in-water emulsion composition containing (a) a powder component, (b) a cationic surfactant having two alkyl chains with 12 or more and 22 or less carbon atoms, (c) an oil phase component, and (d) a water phase component.
  • the frictional feeling after use and the sticky feeling during application can be improved by blending a hydrophobized powder in the oil phase component.
  • oil-in-water makeup compositions having the blending compositions listed in Table 15 were produced, and the above-described evaluations (2) and (3) were performed for each sample.
  • Phase A was heated to 70° C. and dispersed by ultrasonic wave treatment.
  • Phase B was added to this, the mixture was emulsified with an emulsifying machine, and then it was cooled.
  • Test Examples 59 to 62 As shown in Table 15, the compositions of Test Examples 59 to 62, wherein 50 mass % or higher silicone oil, with respect to the oil phase component, is contained in the oil phase, showed no sticky feeling, and a refreshing texture was present.
  • an acrylic silicone with a specific structure (Test Example 59) or a biterminally silicone-modified glycerin (Test Example 60) was blended, or when both of them were blended (Test Example 61)
  • a significant improvement in usability was observed.
  • Test Example 63 wherein the blending quantity of a silicone oil is less than 50 mass % with respect to the oil phase component, the sample was extremely sticky, and a refreshing feeling was also absent.
  • the water resistance of a makeup composition was evaluated with respect to the blending quantity of a surfactant.
  • the evaluation method was as follows.
  • the amount of the external preparation on the skin immediately after a sample was applied on the arm of 10 panelists and the amount after washing the arm with a specific amount of running water were determined by the extraction with ethanol.
  • the residual rate (%) was calculated by the following equation.
  • Residual rate (%) (amount of external preparation on the skin after washing with water)/(amount of external preparation on the skin before washing with water) ⁇ 100
  • the residual rate is 90% or higher.
  • the residual rate is 60% or higher and less than 90%.
  • the residual rate is 30% or higher and less than 60%.
  • the residual rate is less than 30%.
  • Phase A was heated to 70° C. and dispersed by ultrasonic wave treatment.
  • Phase B was added to this, the mixture was emulsified with an emulsifying machine, and then it was cooled.
  • Test Example 64 As shown in Table 16, the composition of Test Example 64, wherein no surfactant other than dimethyl distearyl ammonium chloride was blended, was also excellent in water resistance.
  • the above-described surfactant and another water-soluble surfactant trimethyl stearyl ammonium chloride
  • the high water resistance was shown only if the blending quantity of the another water-soluble surfactant was very small (0.01 mass %) (Test Example 65).
  • the water resistance had a trend to decrease (Test Examples 66 to 68).
  • no water-soluble surfactant is substantively contained other than (b) a cationic surfactant having two alkyl chains with 12 or more and 22 or less carbon atoms.
  • Phase A was heated to 70° C. and dispersed by ultrasonic wave treatment.
  • Phase B was added to this, the mixture was emulsified with an emulsifying machine, and then it was cooled.
  • Test Examples 70 to 72 had excellent formulation stability, and the non-stickiness and the refreshing feeling were also excellent.
  • Test Example 69 wherein the blending quantity of the powder component (silica-coated zinc oxide) involved in emulsification was 0.5 mass %, the formulation stability was poor.
  • the composition in Example 73 wherein 30 mass % of the same powder component was blended, had high stickiness, and the refreshing feeling was absent.
  • the blending quantity of the powder component is 1 to 20 mass % with respect to the composition.
  • Phase A was heated to 70° C. and dispersed by ultrasonic wave treatment.
  • Phase B was added to this, the mixture was emulsified with an emulsifying machine, and then it was cooled.
  • Example 74 wherein the blending quantity of dimethyl distearyl ammonium chloride was 0.0005 mass %
  • Test Example 78 wherein the blending quantity was 1 mass %, the formulation stability was significantly low.
  • the makeup composition of the present invention it is preferable to blend 0.001 to 0.5 mass % , with respect to the composition, of the cationic surfactant having two alkyl chains with 12 or more and 22 or less carbon atoms.
  • Phase A was heated to 70° C. and dispersed by ultrasonic wave treatment.
  • Phase B was added to this, the mixture was emulsified with an emulsifying machine, and then it was cooled.
  • Example 19 the compositions of Test Examples 80 and 81 showed good results in all evaluation items.
  • the composition in Example 79 wherein dimethyl distearyl ammonium chloride with an alkyl chain length of 10 was used, had significantly low formulation stability, and it was not usable.
  • the composition in Example 82 wherein the alkyl chain length was 22, had excellent formulation stability; however, some stickiness was present, and it was unsatisfactory in the refreshing feeling.
  • the length of two alkyl chains of the cationic surfactant is preferably 12 to 22.
  • formulation examples of the makeup composition of the present invention are listed. However, the present invention is not limited to these examples. All the makeup compositions obtained in the below-described formulation examples had high formulation stability, a low sticky feeling, and a refreshing feeling.
  • Components (10) to (13) were mixed and heated to 70° C. The mixture was sufficiently dispersed with a homomixer or by ultrasonic wave. Subsequently, oil phase components (1) to (9), which had been beforehand fragmented by dispersion with a bead mill, were added. After the emulsification was carried out with an emulsifying machine, components (14) to (19) were added. An oil-in-water emulsion foundation was obtained by dispersing them uniformly.
  • Components (11) to (15) were mixed and heated to 70° C. The mixture was sufficiently dispersed with a homomixer or by ultrasonic wave. Subsequently, oil phase components (1) to (10), which had been beforehand fragmented by dispersion with a bead mill, were gradually added to this. After the emulsification was carried out with an emulsifying machine, components (16) to (20) were added. An oil-in-water emulsion foundation was obtained by dispersing them uniformly.
  • Components (11) to (14) were mixed and heated to 70° C. The mixture was sufficiently dispersed with a homomixer or by ultrasonic wave. Subsequently, oil phase components (1) to (10), which had been beforehand fragmented by dispersion with a bead mill, were gradually added to this. After the emulsion was carried out with an emulsifying machine, components (15) to (19), which had been beforehand uniformly dispersed at 90° C. and then cooled, were added to obtain an oil-in-water gel foundation.
  • mass % or “%”, which represents the blending quantity, indicates mass % with respect to the total amount of the composition unless otherwise noted.
  • Emulsified particles were uniform, and the coalescence or aggregation was not observed.
  • Emulsified particles were nearly uniform; however, slight coalescence or aggregation was observed.
  • Emulsified particles were not uniform, and significant coalescence or aggregation was observed.
  • the actual usage test by 10 professional panelists was performed for the hair styling power of the samples.
  • the evaluation criteria were as follows.
  • a sample was applied on the hair strand, and the strand was formed into coils, naturally dried, and stored for 24 hours in a container that was adjusted at a relative humidity of 90% and 25° C.
  • the sensory evaluation, for the shape and texture of the removed strand, was performed by 10 panelists. The determination was based on the following criteria.
  • ⁇ 8 or more panelists determined that there was moisture resistance.
  • ⁇ 3 or more and less than 6 panelists determined that there was moisture resistance.
  • the actual usage test of each sample was performed by 10 professional panelists.
  • the evaluation criteria were as follows.
  • Hair styling cosmetics having the blending compositions listed in Table 20 were produced, and the above-described evaluation tests (1) to (4) were performed for each sample.
  • Phase A was heated to 70° C. and dispersed by ultrasonic wave treatment.
  • Phase B heated to 80° C. was added to this, the emulsification was carried out with an emulsifying machine, and then it was cooled.
  • Test Example 83 wherein the emulsification was carried out with the use of a hydrophilic powder (silica-coated titanium dioxide, silica)
  • Test Example 84 wherein the emulsification was carried out with the use of dimethyl distearyl ammonium chloride
  • Test Example 85 wherein the emulsification was carried out with the use of both dimethyl distearyl ammonium chloride and a hydrophilic powder, showed high emulsion stability, and the good usability was shown in hair styling power, moisture resistance, and non-stickiness.
  • Test Example 86 wherein the emulsification was carried out with the use of only PEG-60 hydrogenated castor oil, which is a hydrocarbon-based surfactant, had poor emulsion stability, and the usability was unsatisfactory.
  • the hair styling cosmetic of the present invention contain an oil-in-water emulsion composition containing (a) a powder component, (b) a cationic surfactant having two alkyl chains with 12 or more and 22 or less carbon atoms, (c) an oil phase component, and (d) a water phase component.
  • hair styling cosmetics having the blending compositions listed in Table 21 were produced, and the above-described evaluation tests (1) to (4) were performed for each sample.
  • Phase A was heated to 70° C. and dispersed by ultrasonic wave treatment.
  • Phase B heated to 80° C. was added to this, the emulsification was carried out with an emulsifying machine, and then it was cooled.
  • Test Examples 88 to 90 showed excellent emulsion stability, and they were also highly evaluated in hair styling power, moisture resistance, and the absence of a sticky feeling.
  • Test Example 87 wherein the blending quantity of the powder component (silica-coated zinc oxide, silica) involved in emulsification was 0.5 mass %, had poor emulsion stability.
  • the blending quantity of the powder component in the hair styling cosmetic of the present invention is 1 to 20 mass % with respect to the composition.
  • hair styling cosmetics having the blending compositions listed in Table 22 were produced, and the above-described evaluation tests (1) to (4) were performed for each sample.
  • Phase A was heated to 70° C. and dispersed by ultrasonic wave treatment.
  • Phase B heated to 80° C. was added to this, the emulsification was carried out with an emulsifying machine, and then it was cooled.
  • Example 92 wherein the blending quantity of dimethyl distearyl ammonium chloride was 0.0005 mass %, had low emulsion stability.
  • Test Example 95 wherein the blending quantity was 1 mass %, had both poor emulsion stability and poor usability.
  • the hair styling cosmetic of the present invention it is preferable that 0.001 to 0.5 mass % of the cationic surfactant having two alkyl chains with 12 or more and 22 or less carbon atoms is blended with respect to the composition.
  • hair styling cosmetics having the blending compositions listed in Table 23 were produced, and the above-described evaluation tests (1) to (4) were performed for each sample.
  • Phase A was heated to 70° C. and dispersed by ultrasonic wave treatment.
  • Phase B heated to 80° C. was added to this, the emulsification was carried out with an emulsifying machine, and then it was cooled.
  • Example 97 wherein dimethyl distearyl ammonium chloride with an alkyl chain length of 10 was used, had significantly low emulsion stability, and it was not usable.
  • the length of two alkyl chains of the cationic surfactant is preferably 12 to 22.
  • hair styling cosmetics having the blending compositions listed in Table 24 were produced, and the above-described evaluation tests (2) to (4) were performed for each sample.
  • Phase A was heated to 70° C. and dispersed by ultrasonic wave treatment.
  • Phase B heated to 80° C. was added to this, the emulsification was carried out with an emulsifying machine, and then it was cooled.
  • Test Example 101 As shown in Table 24, in Test Example 101, wherein only solid oil was blended as the oil phase component, the sticky feeling was high. In Test Example 102, wherein only liquid oil was blended, the hair styling power was poor. In contrast, the composition of Test Example 103, wherein suitable amounts of solid oil and liquid oil were blended, showed excellent results in all items.
  • Test Examples 104 and 105 wherein a large amount of solid oil or liquid oil was blended, the results showed poorer usability compared with Test Example 103.
  • the respective blending quantities of solid oil and liquid oil were preferably 1 to 30 mass % with respect to the total components.
  • formulation examples of the hair styling cosmetic of the present invention are listed. However, the present invention is not limited to these examples. All the hair styling cosmetics obtained in the below-described formulations examples had high emulsion stability and a low sticky feeling, and the hair styling power and moisture resistance were excellent.
  • Phase B was heated to 70° C. and dispersed by ultrasonic wave treatment.
  • Phase A heated to 80° C. was added to this, the emulsification was carried out with an emulsifying machine, phase C was added, and then it was cooled.
  • Phase A Liquid paraffin 10.0 Microcrystalline wax 10.0 Dimethylpolysiloxane 4.0 Stearyl alcohol 2.0 Carnauba wax 3.0 Pentaerythritol tetra-2-ethylhexanoate 2.0 Perfume Q.S.
  • Phase B Propylene glycol 8.0 Silica-coated zinc oxide (30 nm) 2.0 Diethyl distearyl ammonium chloride 0.07 Silica (10 nm) 2.0 Purified water Q.S. Phase C Succinoglycan 0.2 Glycerin 3.0 L-Arginine L-aspartate 0.01 Edetate 0.05 Antiseptic Q.S. Purified water Balance
  • Phase B was heated to 70° C. and dispersed by ultrasonic wave treatment.
  • Phase A heated to 80° C. was added to this, the emulsification was carried out with an emulsifying machine, phase C was added, and then it was cooled.

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US11582981B2 (en) 2016-12-08 2023-02-21 Mitsubishi Chemical Corporation Oil-in-water type emulsion composition, and method for producing said oil-in-water type emulsion composition

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JP5352116B2 (ja) 2013-11-27
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US20100135938A1 (en) 2010-06-03
CN101674798A (zh) 2010-03-17
EP2149361B1 (de) 2014-07-23
WO2008139908A1 (ja) 2008-11-20
KR20100017135A (ko) 2010-02-16
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