WO1996030448A1 - Zinc oxide-coated body pigment and cosmetic material containing the same - Google Patents

Zinc oxide-coated body pigment and cosmetic material containing the same Download PDF

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Publication number
WO1996030448A1
WO1996030448A1 PCT/US1996/003589 US9603589W WO9630448A1 WO 1996030448 A1 WO1996030448 A1 WO 1996030448A1 US 9603589 W US9603589 W US 9603589W WO 9630448 A1 WO9630448 A1 WO 9630448A1
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WIPO (PCT)
Prior art keywords
zinc oxide
pigment
coated
body pigment
oil
Prior art date
Application number
PCT/US1996/003589
Other languages
French (fr)
Inventor
Noboru Kakumoto
Tamotsu Mori
Original Assignee
The Procter & Gamble Company
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by The Procter & Gamble Company filed Critical The Procter & Gamble Company
Priority to AU54239/96A priority Critical patent/AU5423996A/en
Publication of WO1996030448A1 publication Critical patent/WO1996030448A1/en

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    • 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
    • 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
    • A61K8/27—Zinc; Compounds thereof
    • 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
    • A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
    • A61Q1/02—Preparations containing skin colorants, e.g. pigments
    • A61Q1/04—Preparations containing skin colorants, e.g. pigments for lips
    • A61Q1/06—Lipsticks
    • 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
    • A61Q1/12—Face or body powders for grooming, adorning or absorbing
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/04—Compounds of zinc
    • C09C1/043—Zinc oxide
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/28—Compounds of silicon
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/28—Compounds of silicon
    • C09C1/30—Silicic acid
    • C09C1/3045—Treatment with inorganic compounds
    • C09C1/3054—Coating
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/36—Compounds of titanium
    • C09C1/3607—Titanium dioxide
    • C09C1/3653—Treatment with inorganic compounds
    • C09C1/3661—Coating
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/40—Compounds of aluminium
    • C09C1/405—Compounds of aluminium containing combined silica, e.g. mica
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/06—Treatment with inorganic compounds
    • C09C3/063—Coating
    • 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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/01—Particle morphology depicted by an image
    • C01P2004/03—Particle morphology depicted by an image obtained by SEM
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/20—Particle morphology extending in two dimensions, e.g. plate-like
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/60—Optical properties, e.g. expressed in CIELAB-values

Definitions

  • the present invention relates to a zinc oxide-coated body pigment which can be employed as raw material for cosmetics and a method of preparing the same, and a cosmetic comp ⁇ sing the same
  • UV rays reaching the ground include mid ultraviolet radiation (290 to 320 nm UV-B), which causes erythema on the skin upon excessive exposure to result in inflammation and melanism and is regarded as one of the causes for carcinoma cutaneum. and near ultraviolet radiation (320 to 400 nm UV-A), which hardh causes erythema but oxidizes reduced melanin of the skin to cause melanin chromatosis and melanism and is regarded as a cause for early aging of the skin resulting from prolonged exposure
  • mid ultraviolet radiation 290 to 320 nm UV-B
  • near ultraviolet radiation 320 to 400 nm UV-A
  • a SPF (sun protector factor) value is generally employed as an index for protecting the skin against ultraviolet rays, on the assumption that the sunscreemng effect is improved as the SPF value is increased
  • a sunscreemng cosmetic is blended with an ultraviolet absorbent and an ultraviolet scattering agent for cutting off ultraviolet rays, in order to attain a high SPF value
  • a large amount of ultraviolet absorbent results in problems of solubility with other bases, bad influences such as denaturation exerted on other bases, reduction of ultraviolet absorption power and coloring caused by decomposition of the ultraviolet absorbent, inferior safety such as increase of skin irritation, and the like
  • the ultraviolet absorbent is considerably problematic as cosmetic raw mate ⁇ al, and cosmetics containing a large amount of such raw material may be improper as cosmetics
  • a general ultraviolet scattering agent zinc oxide, titanium oxide, zirconium oxide, kaolin or the like is known
  • Such an inorganic pigment exhibits an ultraviolet scattering effect over a wide range with small denaturation caused by the ultraviolet rays, and has a small problem as to skin irritation due to non-percutaneous absorption
  • this pigment has such high masking power that the same vhitely remains on the skin upon application, to result in an inferior appearance
  • Such tendency is remarkable in zinc oxide, in particular
  • Japanese Patent Laid-Open Nos 60-231607, 1-175921 and the like disclose fine zinc oxide, titanium oxide, zirconium oxide and so on When such a fine inorganic pigment is blended into cosmetics, however, secondary aggregation is caused and no sufficient effect is attained as sunscreemng cos ⁇ etics Further, the cosmetics spread infe ⁇ orly, and those color are darkened with time, to result in inconvenient problems for serving as cosmetics
  • Japanese Patent Laid- Open Nos 5-156174, 5-17329, 5-246823 and the like disclose pigment composi ⁇ ons prepared by coating surfaces of scale pigments such as mica, se ⁇ cite and talc with titanium oxide or zinc oxide
  • Japanese Patent Laid-Open No 5-230394 discloses a composite body pigment which is prepared by coating plate type powder of mica, talc, se ⁇ cite, etc , or sphencal powder of silica, alumina, zircoma, etc , with titanium oxide or zirconium oxide and further coating the same with zinc oxide
  • an object of the present invention is to provide a body pigment which b ⁇ ngs safe usage and excellent application feeling which can be blended into cosmetics or the like in a large amount and has a high sunscreemng effect and a cosmetic comp ⁇ sing the body pigment
  • Fig 1 is a SEM photograph showing the grain mode of zinc oxide-coated talc according to Example of the present invention
  • Fig 2 is a SEM photograph showing the grain mode of zinc oxide-coated mica according to Example of the present invention
  • Fig 3 is a SEM photograph showing the grain mode of zinc oxide-coated sericite according to Example of the present invention.
  • Fig. 4 is a SEM photograph showing the grain mode of plate-type zinc oxide serving as raw material employed in the present invention.
  • Fig. 5 is a SEM photograph showing the grain mode of talc serving as raw material employed in the present invention.
  • Fig. 6 is a SEM photograph showing the grain mode of mica serving as raw material employed in the present invention.
  • Fig. 7 is a SEM photograph showing the grain mode of se ⁇ cite serving as raw material employed in the present invention.
  • a zinc oxide-coated body pigment in the present invention comp ⁇ ses treatment of sticking plate-type zinc oxide to the surface of a body pigment.
  • a zinc oxide-coated body pigment comprises sticking the plate-type zinc oxide to the surface of a body pigment by treating the body pigment with acid and alkali under the presence of plate-type zinc oxide.
  • a convenient method for preparing such a zinc oxide-coated body pigment comprises the steps of mixing plate-type zinc oxide with a body pigment in water, adding acid to the mixture for treating the same with the acid, adding alkali to the acid-treated mixture for treating the same with the alkali, and washing the alkali-treated mixture with water and thereafter drying the same.
  • the acid employed for the acid treatment is not particularly rest ⁇ cted but sulfuric acid, nit ⁇ c acid, hydrochlo ⁇ c acid or a combination of these acids. can be used.
  • the alkali employed for the alkali treatment is not particularly rest ⁇ cted but sodium hydroxide, aqueous ammonia, basic sodium carbonate or the like, can be used.
  • an oxidant such as aqueous hydrogen peroxide can be added and treated after the alkali treatment as needed.
  • the plate-type zinc oxide employed in the present invention includes one also called flake zinc oxide, and ones which has a mean thickness of 0.1 to 0.5 ⁇ m, preferably 0 1 to 0 3 ⁇ m, and a mean diameter of 1 to 100 ⁇ m, preferably 1 to 80 ⁇ m.and most preferably about 2 to 5 ⁇ m
  • the zinc oxide has supe ⁇ or ultraviolet scatterability due to the plate shape.
  • Such plate-type zinc oxide generall y has high spreadability.and is excellent in adhesion and feeling Further, the plate-type zinc oxide has high transmittance in the visible light region, and is supe ⁇ or in transparency to that which is not plate- shaped
  • Such plate-type zinc oxide can be used from that disclosed in Japanese Patent Laying-Open No 6-72821 or the like, for example According to a method disclosed in this Laid-Open.
  • such plate- type zinc oxide can be obtained by mixing a zinc salt solution with a solution containing ammonium ion or a compound which is decomposed to generate ammonium ion, camng out neutralization reaction for depositing flake basic zinc salt or flake zinc hydroxide under the presence of 0 0001 to 0 5 moles of metal atom of aluminum and/or iron per one mole of zinc atom in the solution, filte ⁇ ng, washing and drying the deposit resulting from the neutralization reaction, and fi ⁇ ng the same in an oxidizing atmosphere
  • the plate-type zinc oxide is obtained bv mixing the flake basic zinc salt or flake zinc hydroxide deposited by the neutralization reaction with a metal containing metal atom of aluminum and or iron by the aforementioned presc ⁇ bed amount or a metal compound thereof thereafter filte ⁇ ng and drying the
  • Fig 4 is a scan electron microscopic (hereinafter referred to as SEM) photograph showing exemplary plate-type zinc oxide which can be employed in the present invention
  • the plate-type zinc oxide which consists of extremely fine grains, may be present in cosmetics as a secondary or tertiary aggregate
  • the aforementioned thickness and diameter of the plate-tvpe zinc oxide do not express the sizes of such an aggregate
  • the body pigment to which the plate-type zinc oxide is stuck according to the present invention is not particularly rest ⁇ cted so far as i pu ⁇ ties can be removed from the same and its surface can be activated by acid treatment and alkali treatment, while the same includes talc, mica sencite, titanium oxide, fine titanium oxide, kaolin, iron oxide red, iron oxide vellow, silicic anhyd ⁇ de and iron oxide black
  • the content of the plate-type zinc oxide is preferably 0 1 to 50 percent by weight, and more preferably 10 to 30 percent bv weight
  • the content of the body pigment is preferably 50 to 99 9 percent by weight, and more preferably 70 to 90 percent by weight If the content of the plate-tvpe zinc oxide is too small, the ultraviolet scatterability may be so insufficient that a sunscreemng effect etc cannot be sufficiently attained If the content of the plate-type zinc oxide is too large, on the other hand, this may lead to contamination with independent zinc oxide which is not stuck to the surface of the body pigment, to cause a problem in dispersibility etc
  • a cosmetic matenal according to the present invention contains the aforementioned inventive zinc oxide-coated body pigment or a zinc oxide-coated body pigment which is prepared by the aforementioned method
  • the present invention can be applied to any of va ⁇ ous cosmetics such as loose powder, pressed powder, cake makeup, milky lotion and the like
  • the present invention can be applied to foundation rouge eye shadow, face powder, makeup base, cream foundation, liquid foundation, sunscreemng cream/lotion or the like
  • the inventive cosmetic contains components which are blended into a general cosmetic mate ⁇ al, in addition to the aforementioned zinc oxide-coated bodv pigment according to the present invention
  • cosmetics such as cake makeup and lipstick contain 2 to 50 percent by weight and 80 to 95 percent by weight of oily components respectively
  • the cosmetics such as cake makeup and lipstick further contain 5 to 88 percent by weight and 2 to 20 percent by weight of pigments respectively
  • the oily components, the pigment and other components are now desc ⁇ bed
  • the oily components employed in the present invention can be selected from a group consisting of solid oilv component, liquid oil oil gelatimzer and mixtures thereof These components can be selected by those having ordinary skill, in accordance with a desired mode of the cosmetic composition
  • a mixture of a solid oily component, liquid oil and oil gelatimzer is presc ⁇ bed as to a cosmetic composition such as foundation, eve shadow or rouge, for example, containing at least about 10 % of pigment
  • a solid oily component serves as a hardener in the cosmetic composition This can assist formation of a solid structure of the composition
  • the solid oilv component is a low melting point organic compound or a mixture of high molecular weight substances and in the form of a solid or paste at the room temperature
  • the solid oilv component is wax hydrocarbon fattv acid aliphatic alcohol, natural fat or ester but not rest ⁇ cted to these
  • Natural, mineral or synthetic wax can be employed in the present invention
  • natural wax o ⁇ ginanng from animals are beeswax, spermaceti, lanolin and shellac wax
  • examples of natural wax o ⁇ ginating from vegetables are camauba wax, candellila wax, bavberry wax and sugarcane wax
  • examples of natural wax o ⁇ ginating from minerals are ceresin wax, montan wax, paraffin wax, microcrystalline wax, vaseline, petroleum and petrolatum wax, while the employable wax is not rest ⁇ cted to these
  • synthetic wax are polyol etherester such as carbowax or hydrocarbon type wax silicone wax and polyethylene wax.
  • the employable synthetic wax is not rest ⁇ cted to these Wax-type synthetic t ⁇ glyce ⁇ de such as ester of linear fatty acid is also useful
  • Most preferable examples of the wax are candellila wax. ceresin wax, lanolin, microcrystalline wax, camauba wax, beeswax and paraffin wax
  • the fatty acid employed in the present invention may be saturated or unsaturated, and may have straight or side chains.
  • Examples of the fatty acid are lau ⁇ c acid, myristic acid, palmitic acid, stearic acid and behenic acid, while the employable fatty acid is not restricted to these.
  • aliphatic alcohol employed in the present invention are octyl alcohol, decyl alcohol, lauryl alcohol, miristvl alcohol, cetyl alcohol, stearvl alcohol and behenyl alcohol, while the employable aliphatic alcohol is not restricted to these.
  • Examples of natural fat employed in the present invention are palm oil. Japan wax. hardened castor oil and cholesterol, while the employable natural fat is not restricted to these
  • ester which is useful for the present invention are mi ⁇ styl mi ⁇ state, mi ⁇ styl palmitate. mi ⁇ styl stearate. cetyl palmitate, cetyl stearate. cetyl lactate, stearvl lactate. cholesterol stearate, cholesterol oleate. cholesterol palmitate. cholesterol laurate. cholesterol mi ⁇ state. cholesterol linolate and cholesterol ricinoleate. while the employable ester is not rest ⁇ cted to these
  • the liquid oil serves as softener, to provide the cosmetics with spread and moisture
  • the liquid oil is a material which freely flows at room temperature
  • the liquid oil may be volatile Examples of the liquid oil are hydrocarbon oil. natural oil, aliphatic alcohol, fatty acid ester and silicone oil, while the employable liquid oil is not restricted to these
  • hydrocarbon oil which is useful for the present invention are liquid paraffin, squalane. liquid petrolatum, mineral oil and liquid polybutene. while the employable hydrocarbon oil is not rest ⁇ cted to these.
  • Natural oil which is employed in the present invention is typically a mixture of saturated fatty acid and unsaturated fatty acid Examples of natural oil de ⁇ ved from vegetables are almond oil. olive oil. sesame oil. safflower oil. avocado oil. cotton seed oil, jojoba oil. castor oil. rapeseed oil. soybean oil, Ap ⁇ cot Kernel oil. coconut oil. hardened vegetable oil and cocoa butter, while the employable natural oil is not rest ⁇ cted to these Examples of natural oil which is de ⁇ ved from animal sources are mink oil and yolk oil. while the employable natural oil is not rest ⁇ cted to these
  • aliphatic alcohol which is useful for the present invention are isostearvl alcohol, lanolin alcohol, oleyl alcohol, hexadecyl alcohol, octv Idodecanol alcohol, linoleyl alcohol, linolenyl alcohol and arachidyl alcohol, while the employable aliphatic alcohol is not rest ⁇ cted to these
  • the fatty acid which is useful for the present invention may be natural or synthetic, and saturated or unsaturated. and may have straight or side chains
  • Examples of the fatty acid useful for the present invention are adipic acid, capr lic acid, cap ⁇ c acid, isostea ⁇ c acid. Iinolenic acid. ricinoleic acid, oleic acid, elaidic acid and erucic acid, while the employable fatty acid is not rest ⁇ cted to these.
  • fatty acid ester which is useful for the present invention are cetyl ncinoleate. cetyl oleate. cetvl octanoate. cetyl acetate, glyceryl t ⁇ octanoate. isopropvl lanolic fatty acid, isopropvl linoleate. isopropvl ⁇ uristylate, isopropyi palmitate. isopropvl oleate. isopropvl stearate. ethyl lactate. ethyl glutamate, ethyl laurate, ethyl linoleate.
  • ethyl methacr late ethyl mi ⁇ stylate.
  • ethyl palmitate diisopropyl adipate
  • octyldodecyl mi ⁇ st late octyl palmitate.
  • octylisopelargonate octyldodecvl lactate.
  • Non-volatile and volatile esters having straight and side chains and cyclic silicone such as dimethicon. phenyl dimethicon or cyclomethicon are also useful
  • the oil gelatimzer is added in order to gelate the preparation or adjust the viscosity of the preparation
  • Examples of the oil gelatimzer which is useful for the present invention are a condensation product of benzaldehyde and polyhyd ⁇ c alcohol having at least five basic groups such as dibenzylidene xylitol or parat ⁇ benzylidene sorbitol metallic soap such as calcium stearate. calcium palmitate, lithium salt of 2-ethylhexane or aluminum salt of 1.2.hydroxyl stearate. amide, ester and amide de ⁇ vatives of N-acyl ammo acid such as lauroylglutamate dibutylamide.
  • pigments which is employed in the present invention in addition to the aforementioned zinc oxide-coated body pigment are inorganic pigments such as talc. mica. clay, kaolin, zinc oxide, nylon powder, ultrama ⁇ ne. pearl pigments (bismuth oxychlo ⁇ de or guanine) iron oxide, titanium oxide, titanium mica and calcium carbonate, and organic pigments such as tar pigments, while the employable pigment is not rest ⁇ cted to these Pigments which are surface-treated with silicone and its de ⁇ vative, metallic soap, fluo ⁇ ne compounds and their de ⁇ vative, lecithin and its de ⁇ vative, a ⁇ uno acids and their salt and the like are also employable
  • the pigment can also be dispersed in an oily medium which is disclosed in the above item of liquid oil before employment
  • the pigment can be purchased in a state previously dispersed in an oilv medium such as castor oil, or as dry powder which is dispersed in a medium subsequently selected bv the presc ⁇ ber
  • composition which is prepared by the inventive method can contain the following components, in addition to those already disclosed in this specification
  • the components are an antioxidant, a preservative, an antiphlogistic, a converger, a pH buffer, perfume, ultraviolet and infrared screening agents, a nonionic surface active agent such as fatty acid ester or polyoxyalkylene fatty acid ester, amphote ⁇ c and anionic surface active agents such as lecithin and phosphate, vitamins, and a skin conditioner
  • the antioxidant and the preservative can be and are generally blended into the inventive composition in order to make a product which is attractive for the consumers
  • Useful antioxidants and preservatives are tocopherol, dibutylhydroxytoluene, methylparaben and propvlparaben Each of these components can be present typically in a value not exceeding 1 %
  • Useful skin conditioners are ⁇ -glycyrrhetic acid and its de ⁇ vative, a vegetable extract, allantoin, collagen and its extract, and treated elastin fiber
  • plate-type zinc oxide is stuck to the surface of a body pigment
  • the plate-tvpe zinc oxide itself has excellent ultraviolet scatterability and such plate-type zinc oxide is stuck to the surface of the body pigment, whereby the zinc oxide-coated body pigment according to the present invention has excellent ultraviolet scatterability, causes no secondary aggregation, and exhibits excellent dispersibility upon blending into a cosmetic matenal, for example Therefore, the inventive body pigment can be blended into a cosmetic mate ⁇ al or the like in a large amount, to attain a sufficient sunscreemng effect etc
  • the cosmetic mate ⁇ al according to the present invention can sufficiently cut off ultraviolet rays and provide a high SPF value without being blended with a large amount of ultraviolet absorbent Examples
  • the mate ⁇ al was dned through a drier at about 120°C for about 12 hours and thereafter pulve ⁇ zed. and the particle diameters were regula ⁇ zed to about 5 ⁇ m bv a classifier
  • Fig 1 is a SEM photograph of the silicone-treated zinc oxide-coated talc obtained in the aforementioned manner
  • Fig 4 is a SEM photograph showing the plate-type zinc oxide employed in the aforementioned method
  • Fig 5 is a SEM photograph showing the raw mate ⁇ al of talc employed in the aforementioned method
  • Zinc oxide-coated mica was prepared in a similar manner to the aforementioned method of prepa ⁇ ng zinc oxide-coated talc, except that mica (trade name R-1000-P-2S by Kakuhachi Gyo ⁇ npaku Co , Ltd ) was employed as a body pigment in place of talc
  • Fig 2 shows a SEM photograph of the obtained silicone- treated zinc oxide-coated mica
  • Fig 6 is a SEM photograph of the mica employed as the raw mate ⁇ al
  • Zinc oxide-coated senate was prepared in a similar manner to the aforementioned method of preparing zinc oxide-coated talc, except that senate (trade name Eight Pearl 300S-P-2S by Kakuhachi Gyo ⁇ npaku Co , Ltd ) was employed as a body pigment in place of talc
  • Fig 3 shows a SEM photograph of the obtained silicone- treated zinc oxide-coated se ⁇ cite
  • Fig 7 is a SEM photograph of the se ⁇ cite employed as the raw mate ⁇ al
  • Zinc oxide-coated titanium oxide was prepared in a similar manner to the aforementioned method of prepa ⁇ ng zinc o.xide-coated talc, except that titanium oxide (trade name T ⁇ tan ⁇ um-P-2S by Kakuhachi Gyo ⁇ npaku Co , Ltd ) was employed as a body pigment in place of talc
  • silicone-treated zinc oxide-coated mica, silicone-treated zinc oxide-coated talc silicone- treated zinc oxide-coated se ⁇ cite and silicone-treated zinc oxide-coated titanium oxide obtained in the aforementioned manners were employed to presc ⁇ be the following cosmetics
  • a pressed cake makeup was prescribed by blending matenals at the ratios of the following Example 1
  • a pressed cake makeup was prepared from raw matenals of talc, se ⁇ cite and mica which were subjected to silicone treatment with no zinc oxide coating, at blending ratios shown in the following table of comparative example 1
  • Plate-type zinc oxide in the blending of comparative example 1 is that of raw mate ⁇ al employed for zinc oxide coating
  • silicone-treated zinc oxide-coated talc 25 0 % silicone-treated zinc oxide-coated senate 26 0 % silicone-treated zinc oxide-coated mica 10 0 % titanium oxide 10 0 % plate-tvpe titanium oxide 10 0 % nylon powder 5 0 % pigment 2 5 % silicone oil 7 5 % squalane 2 0 % lanolin 2 0 % antioxidant, paraben proper quantity
  • the cosmetic according to Example 1 employing the inventive zinc oxide-coated pigment exhibits an extremely high SPF value as compared with the cosmetic according to comparative example 1
  • Example 2 silicone-treated zinc oxide-coated talc 82 0 % silicone-treated zinc oxide-coated titanium oxide 3 0 % silicone-treated zinc o.xide-coated mica 15 0 % antioxidant, paraben proper quantity pigment proper quantity
  • the cosmetic according to Example 2 of the present invention exhibits a high SPF value as compared with the cosmetic according to comparative example 2
  • Preparation Example 5 silicone-treated zinc oxide-coated talc 250 % silicone-treated zinc oxide-coated mica 100 % silicone-treated zinc oxide-coated titanium oxide 130% pigment 30% liquid paraffin 150% isopropyi palmitate 130% lanolin alcohol 30% microcrystalline wax 70% ozoke ⁇ te 80% antioxidant, paraben proper quantity
  • the zinc oxide-coated body pigment according to the present invention can be blended into various cosmetics, to attain an excellent sunscreemng effect etc.
  • the zinc oxide-coated body pigment according to the present invention which is prepared by homogeneously sticking plate-type zinc oxide having excellent ultraviolet scatterability to the surface of a body pigment, has excellent ultraviolet scatterability.
  • an excellent sunscreening effect etc. can be attained without being blended with a large amount of organic ultraviolet absorbent. Therefore, it is possible to provide safe cosmetics having excellent application feeling and an excellent sunscreening effect.

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Abstract

A zinc oxyde-coated body pigment of the present invention is excellent in dispersibility, has excellent ultraviolet dispersibility, and can attain an excellent sunscreening effect upon blending into a cosmetic or the like. Preferably, it is characterized in that a body pigment is treated with acid and alkali under the presence of plate-type zinc oxide, so that the plate-type zinc oxide is stuck to the surface of the body pigment.

Description

ZINC OXIDE-COATED BODY PIGMENT AND COSMETIC MATERIAL CONTAINING THE SAME
FIELD OF INVENTION
The present invention relates to a zinc oxide-coated body pigment which can be employed as raw material for cosmetics and a method of preparing the same, and a cosmetic compπsing the same
BACKGROUND OF THE INVENTION
It is well known that ultraviolet rays reaching the ground include mid ultraviolet radiation (290 to 320 nm UV-B), which causes erythema on the skin upon excessive exposure to result in inflammation and melanism and is regarded as one of the causes for carcinoma cutaneum. and near ultraviolet radiation (320 to 400 nm UV-A), which hardh causes erythema but oxidizes reduced melanin of the skin to cause melanin chromatosis and melanism and is regarded as a cause for early aging of the skin resulting from prolonged exposure
As such influences exerted by the ultraviolet rays on the skin have been clarified, demands for sunscreemng cosmetics are now being increased A SPF (sun protector factor) value is generally employed as an index for protecting the skin against ultraviolet rays, on the assumption that the sunscreemng effect is improved as the SPF value is increased
In general, a sunscreemng cosmetic is blended with an ultraviolet absorbent and an ultraviolet scattering agent for cutting off ultraviolet rays, in order to attain a high SPF value
As a general ultraviolet absorbent, deπvatives of benzophenone, derivatives of cinnamic acid, deπvauves of benzoic acid or the like, is known While a cosmetic composition must be blended with a relatively large amount of ultraviolet absorbent in order to attain an excellent sunscreemng effect, various problems are caused in this case
For example, a large amount of ultraviolet absorbent results in problems of solubility with other bases, bad influences such as denaturation exerted on other bases, reduction of ultraviolet absorption power and coloring caused by decomposition of the ultraviolet absorbent, inferior safety such as increase of skin irritation, and the like Thus, the ultraviolet absorbent is considerably problematic as cosmetic raw mateπal, and cosmetics containing a large amount of such raw material may be improper as cosmetics On the other hand, as a general ultraviolet scattering agent zinc oxide, titanium oxide, zirconium oxide, kaolin or the like is known Such an inorganic pigment exhibits an ultraviolet scattering effect over a wide range with small denaturation caused by the ultraviolet rays, and has a small problem as to skin irritation due to non-percutaneous absorption However, this pigment has such high masking power that the same vhitely remains on the skin upon application, to result in an inferior appearance Such tendency is remarkable in zinc oxide, in particular
In order to overcome such disadvantages, Japanese Patent Laid-Open Nos 60-231607, 1-175921 and the like disclose fine zinc oxide, titanium oxide, zirconium oxide and so on When such a fine inorganic pigment is blended into cosmetics, however, secondary aggregation is
Figure imgf000004_0001
caused and no sufficient effect is attained as sunscreemng cosπ etics Further, the cosmetics spread infeπorly, and those color are darkened with time, to result in inconvenient problems for serving as cosmetics
As examples of cosmeuc raw mateπal which can solve such problems, Japanese Patent Laid- Open Nos 5-156174, 5-17329, 5-246823 and the like disclose pigment composiϋons prepared by coating surfaces of scale pigments such as mica, seπcite and talc with titanium oxide or zinc oxide Further, Japanese Patent Laid-Open No 5-230394 discloses a composite body pigment which is prepared by coating plate type powder of mica, talc, seπcite, etc , or sphencal powder of silica, alumina, zircoma, etc , with titanium oxide or zirconium oxide and further coating the same with zinc oxide
While a safe and natural makeup can be attained by employing such a body pigment composition, a sufficient sunscreemng effect cannot be attained if the composition is independently employed or combined with a general ultraviolet absorbent which is in an amount causing no problem in safety
In order to solve the aforementioned problems of the pπor art, an object of the present invention is to provide a body pigment which bπngs safe usage and excellent application feeling which can be blended into cosmetics or the like in a large amount and has a high sunscreemng effect and a cosmetic compπsing the body pigment
BRIEF DESCRIPTION OF THE DRAWINGS
Fig 1 is a SEM photograph showing the grain mode of zinc oxide-coated talc according to Example of the present invention
Fig 2 is a SEM photograph showing the grain mode of zinc oxide-coated mica according to Example of the present invention
Fig 3 is a SEM photograph showing the grain mode of zinc oxide-coated sericite according to Example of the present invention.
Fig. 4 is a SEM photograph showing the grain mode of plate-type zinc oxide serving as raw material employed in the present invention.
Fig. 5 is a SEM photograph showing the grain mode of talc serving as raw material employed in the present invention.
Fig. 6 is a SEM photograph showing the grain mode of mica serving as raw material employed in the present invention.
Fig. 7 is a SEM photograph showing the grain mode of seπcite serving as raw material employed in the present invention.
DETAILED DESCRIPTION OF THE INVETION
A zinc oxide-coated body pigment in the present invention compπses treatment of sticking plate-type zinc oxide to the surface of a body pigment.
In a more preferred embodiment of the present invention, a zinc oxide-coated body pigment comprises sticking the plate-type zinc oxide to the surface of a body pigment by treating the body pigment with acid and alkali under the presence of plate-type zinc oxide.
A convenient method for preparing such a zinc oxide-coated body pigment according to the preferred embodiment comprises the steps of mixing plate-type zinc oxide with a body pigment in water, adding acid to the mixture for treating the same with the acid, adding alkali to the acid-treated mixture for treating the same with the alkali, and washing the alkali-treated mixture with water and thereafter drying the same.
It is conceivable that impurities etc. are removed from the surface of the body pigment by the acid treatment and the alkali treatment, so that the plate-type zinc oxide is more strongly and more homogeneously stuck to the active surface of the body pigment.
The acid employed for the acid treatment is not particularly restπcted but sulfuric acid, nitπc acid, hydrochloπc acid or a combination of these acids. can be used.
The alkali employed for the alkali treatment is not particularly restπcted but sodium hydroxide, aqueous ammonia, basic sodium carbonate or the like, can be used.
In the method according to the present invention, an oxidant such as aqueous hydrogen peroxide can be added and treated after the alkali treatment as needed.
The plate-type zinc oxide employed in the present invention includes one also called flake zinc oxide, and ones which has a mean thickness of 0.1 to 0.5 μm, preferably 0 1 to 0 3 μm, and a mean diameter of 1 to 100 μm, preferably 1 to 80 μm.and most preferably about 2 to 5 μm The zinc oxide has supeπor ultraviolet scatterability due to the plate shape. Such plate-type zinc oxide generally has high spreadability.and is excellent in adhesion and feeling Further, the plate-type zinc oxide has high transmittance in the visible light region, and is supeπor in transparency to that which is not plate- shaped
Such plate-type zinc oxide can be used from that disclosed in Japanese Patent Laying-Open No 6-72821 or the like, for example According to a method disclosed in this Laid-Open. such plate- type zinc oxide can be obtained by mixing a zinc salt solution with a solution containing ammonium ion or a compound which is decomposed to generate ammonium ion, camng out neutralization reaction for depositing flake basic zinc salt or flake zinc hydroxide under the presence of 0 0001 to 0 5 moles of metal atom of aluminum and/or iron per one mole of zinc atom in the solution, filteπng, washing and drying the deposit resulting from the neutralization reaction, and fiπng the same in an oxidizing atmosphere Alternatively, the plate-type zinc oxide is obtained bv mixing the flake basic zinc salt or flake zinc hydroxide deposited by the neutralization reaction with a metal containing metal atom of aluminum and or iron by the aforementioned prescπbed amount or a metal compound thereof thereafter filteπng and drying the mixture as needed, and firing the same in an oxidizing atmosphere
Other methods of prepaπng plate-type zinc oxide are descπbed in Japanese Patent Publications Nos 54-19235, 54-19237 and 55-25133, Japanese Patent Laid-Open No 3-604294 and so on
Fig 4 is a scan electron microscopic (hereinafter referred to as SEM) photograph showing exemplary plate-type zinc oxide which can be employed in the present invention As shown in Fig 4, the plate-type zinc oxide, which consists of extremely fine grains, may be present in cosmetics as a secondary or tertiary aggregate The aforementioned thickness and diameter of the plate-tvpe zinc oxide do not express the sizes of such an aggregate
The body pigment to which the plate-type zinc oxide is stuck according to the present invention is not particularly restπcted so far as i puπties can be removed from the same and its surface can be activated by acid treatment and alkali treatment, while the same includes talc, mica sencite, titanium oxide, fine titanium oxide, kaolin, iron oxide red, iron oxide vellow, silicic anhydπde and iron oxide black
In the zinc oxide-coated body pigment according to the present invention, the content of the plate-type zinc oxide is preferably 0 1 to 50 percent by weight, and more preferably 10 to 30 percent bv weight On the other hand, the content of the body pigment is preferably 50 to 99 9 percent by weight, and more preferably 70 to 90 percent by weight If the content of the plate-tvpe zinc oxide is too small, the ultraviolet scatterability may be so insufficient that a sunscreemng effect etc cannot be sufficiently attained If the content of the plate-type zinc oxide is too large, on the other hand, this may lead to contamination with independent zinc oxide which is not stuck to the surface of the body pigment, to cause a problem in dispersibility etc
A cosmetic matenal according to the present invention contains the aforementioned inventive zinc oxide-coated body pigment or a zinc oxide-coated body pigment which is prepared by the aforementioned method The present invention can be applied to any of vaπous cosmetics such as loose powder, pressed powder, cake makeup, milky lotion and the like
More specifically, the present invention can be applied to foundation rouge eye shadow, face powder, makeup base, cream foundation, liquid foundation, sunscreemng cream/lotion or the like
The inventive cosmetic contains components which are blended into a general cosmetic mateπal, in addition to the aforementioned zinc oxide-coated bodv pigment according to the present invention In typical examples, cosmetics such as cake makeup and lipstick contain 2 to 50 percent by weight and 80 to 95 percent by weight of oily components respectively The cosmetics such as cake makeup and lipstick further contain 5 to 88 percent by weight and 2 to 20 percent by weight of pigments respectively The oily components, the pigment and other components are now descπbed
Oilv Components
The oily components employed in the present invention can be selected from a group consisting of solid oilv component, liquid oil oil gelatimzer and mixtures thereof These components can be selected by those having ordinary skill, in accordance with a desired mode of the cosmetic composition Preferably, a mixture of a solid oily component, liquid oil and oil gelatimzer is prescπbed as to a cosmetic composition such as foundation, eve shadow or rouge, for example, containing at least about 10 % of pigment
Solid Oilv Component
A solid oily component serves as a hardener in the cosmetic composition This can assist formation of a solid structure of the composition The solid oilv component is a low melting point organic compound or a mixture of high molecular weight substances and in the form of a solid or paste at the room temperature The solid oilv component is wax hydrocarbon fattv acid aliphatic alcohol, natural fat or ester but not restπcted to these
Natural, mineral or synthetic wax can be employed in the present invention Examples of natural wax oπginanng from animals are beeswax, spermaceti, lanolin and shellac wax, examples of natural wax oπginating from vegetables are camauba wax, candellila wax, bavberry wax and sugarcane wax, and examples of natural wax oπginating from minerals are ceresin wax, montan wax, paraffin wax, microcrystalline wax, vaseline, petroleum and petrolatum wax, while the employable wax is not restπcted to these Examples of synthetic wax are polyol etherester such as carbowax or hydrocarbon type wax silicone wax and polyethylene wax. while the employable synthetic wax is not restπcted to these Wax-type synthetic tπglyceπde such as ester of linear fatty acid is also useful Most preferable examples of the wax are candellila wax. ceresin wax, lanolin, microcrystalline wax, camauba wax, beeswax and paraffin wax
The fatty acid employed in the present invention may be saturated or unsaturated, and may have straight or side chains. Examples of the fatty acid are lauπc acid, myristic acid, palmitic acid, stearic acid and behenic acid, while the employable fatty acid is not restricted to these.
Examples of aliphatic alcohol employed in the present invention are octyl alcohol, decyl alcohol, lauryl alcohol, miristvl alcohol, cetyl alcohol, stearvl alcohol and behenyl alcohol, while the employable aliphatic alcohol is not restricted to these.
Examples of natural fat employed in the present invention are palm oil. Japan wax. hardened castor oil and cholesterol, while the employable natural fat is not restricted to these
Examples of ester which is useful for the present invention are miπstyl miπstate, miπstyl palmitate. miπstyl stearate. cetyl palmitate, cetyl stearate. cetyl lactate, stearvl lactate. cholesterol stearate, cholesterol oleate. cholesterol palmitate. cholesterol laurate. cholesterol miπstate. cholesterol linolate and cholesterol ricinoleate. while the employable ester is not restπcted to these
Liquid Oil
The liquid oil serves as softener, to provide the cosmetics with spread and moisture The liquid oil is a material which freely flows at room temperature The liquid oil may be volatile Examples of the liquid oil are hydrocarbon oil. natural oil, aliphatic alcohol, fatty acid ester and silicone oil, while the employable liquid oil is not restricted to these
Examples of hydrocarbon oil which is useful for the present invention are liquid paraffin, squalane. liquid petrolatum, mineral oil and liquid polybutene. while the employable hydrocarbon oil is not restπcted to these. Natural oil which is employed in the present invention is typically a mixture of saturated fatty acid and unsaturated fatty acid Examples of natural oil deπved from vegetables are almond oil. olive oil. sesame oil. safflower oil. avocado oil. cotton seed oil, jojoba oil. castor oil. rapeseed oil. soybean oil, Apπcot Kernel oil. coconut oil. hardened vegetable oil and cocoa butter, while the employable natural oil is not restπcted to these Examples of natural oil which is deπved from animal sources are mink oil and yolk oil. while the employable natural oil is not restπcted to these
Examples of aliphatic alcohol which is useful for the present invention are isostearvl alcohol, lanolin alcohol, oleyl alcohol, hexadecyl alcohol, octv Idodecanol alcohol, linoleyl alcohol, linolenyl alcohol and arachidyl alcohol, while the employable aliphatic alcohol is not restπcted to these
The fatty acid which is useful for the present invention may be natural or synthetic, and saturated or unsaturated. and may have straight or side chains Examples of the fatty acid useful for the present invention are adipic acid, capr lic acid, capπc acid, isosteaπc acid. Iinolenic acid. ricinoleic acid, oleic acid, elaidic acid and erucic acid, while the employable fatty acid is not restπcted to these.
Examples of the fatty acid ester which is useful for the present invention are cetyl ncinoleate. cetyl oleate. cetvl octanoate. cetyl acetate, glyceryl tπoctanoate. isopropvl lanolic fatty acid, isopropvl linoleate. isopropvl πuristylate, isopropyi palmitate. isopropvl oleate. isopropvl stearate. ethyl lactate. ethyl glutamate, ethyl laurate, ethyl linoleate. ethyl methacr late, ethyl miπstylate. ethyl palmitate, diisopropyl adipate, octyldodecyl miπst late, octyl palmitate. octylisopelargonate. octyldodecvl lactate. tπdecyl isononanoate. isotπdecyl isononanoate, hexadecyl stearate. oleyl oleate, isononyl isononanoate, isostearyl miπstate, dipentaerythπtol ester, neopentyl glycol dioctanoate and dι(caprylιc/capπc acid) propylene glycol, while the employable fatty acid ester is not restπcted to these Other proper examples of the ester are tπglycende such as tnglyceπde caprylate. tπglyceπde caprate, tπglvceπde isostearate or tπglyceπde adipate. and a cholesterol deπvative such as cholesteryl oleate Non-volatile and volatile esters having straight and side chains and cyclic silicone such as dimethicon. phenyl dimethicon or cyclomethicon are also useful
Oil Gelatimzer
The oil gelatimzer is added in order to gelate the preparation or adjust the viscosity of the preparation Examples of the oil gelatimzer which is useful for the present invention are a condensation product of benzaldehyde and polyhydπc alcohol having at least five basic groups such as dibenzylidene xylitol or paratπbenzylidene sorbitol metallic soap such as calcium stearate. calcium palmitate, lithium salt of 2-ethylhexane or aluminum salt of 1.2.hydroxyl stearate. amide, ester and amide deπvatives of N-acyl ammo acid such as lauroylglutamate dibutylamide. lauroylglutamate stearylamide, dicaproyllysine lauroy lamide. dicaproyllisme lauroylamine salt, dicaproyllisme laurylester or dicaproyllisme lauroylphenyl alaninelaurylamide, dextrin fatty acid ester and 1,2- hydroxysteaπc acid, while the employable oil gelatimzer is not restπcted to these
<Pιgment>
Examples of the pigment which is employed in the present invention in addition to the aforementioned zinc oxide-coated body pigment are inorganic pigments such as talc. mica. clay, kaolin, zinc oxide, nylon powder, ultramaπne. pearl pigments (bismuth oxychloπde or guanine) iron oxide, titanium oxide, titanium mica and calcium carbonate, and organic pigments such as tar pigments, while the employable pigment is not restπcted to these Pigments which are surface-treated with silicone and its deπvative, metallic soap, fluoπne compounds and their deπvative, lecithin and its deπvative, aπuno acids and their salt and the like are also employable
The pigment can also be dispersed in an oily medium which is disclosed in the above item of liquid oil before employment The pigment can be purchased in a state previously dispersed in an oilv medium such as castor oil, or as dry powder which is dispersed in a medium subsequently selected bv the prescπber
Other Components>
The composition which is prepared by the inventive method can contain the following components, in addition to those already disclosed in this specification
Namely, the components are an antioxidant, a preservative, an antiphlogistic, a converger, a pH buffer, perfume, ultraviolet and infrared screening agents, a nonionic surface active agent such as fatty acid ester or polyoxyalkylene fatty acid ester, amphoteπc and anionic surface active agents such as lecithin and phosphate, vitamins, and a skin conditioner
The antioxidant and the preservative can be and are generally blended into the inventive composition in order to make a product which is attractive for the consumers Useful antioxidants and preservatives are tocopherol, dibutylhydroxytoluene, methylparaben and propvlparaben Each of these components can be present typically in a value not exceeding 1 %
Useful skin conditioners are β-glycyrrhetic acid and its deπvative, a vegetable extract, allantoin, collagen and its extract, and treated elastin fiber
[Function]
In the zinc oxide-coated body pigment according to the present invention, plate-type zinc oxide is stuck to the surface of a body pigment The plate-tvpe zinc oxide itself has excellent ultraviolet scatterability and such plate-type zinc oxide is stuck to the surface of the body pigment, whereby the zinc oxide-coated body pigment according to the present invention has excellent ultraviolet scatterability, causes no secondary aggregation, and exhibits excellent dispersibility upon blending into a cosmetic matenal, for example Therefore, the inventive body pigment can be blended into a cosmetic mateπal or the like in a large amount, to attain a sufficient sunscreemng effect etc
Further, the cosmetic mateπal according to the present invention can sufficiently cut off ultraviolet rays and provide a high SPF value without being blended with a large amount of ultraviolet absorbent Examples
Preparation of Zinc Oxide-Coated Talc
10 g of classified talc (trade name P-2S by Kakuhachi Gyoπnpaku Co . Ltd ) having a mean particle diameter of about 10 μm was mixed with 20 g of plate-type zinc oxide (trade name Lucselene FZ-200 by Sumitomo Chemical Co , Ltd , in the form of flakes of 2 to 5 μm in size and 0 2 μm in thickness), with addition of 100 cc of water Then the mixture was stiπed for 10 minutes with addition of 2 cc of nitnc acid, followed by addition of 2 cc of 20 wt % aqueous sodium hydroxide The mixture was heated to at least 100°C by heat of neutralization, to form bubbles The mixture was left intact for 5 to 6 hours, and thereafter dehydrated after further addition of 100 cc of water Further. 100 cc of water was added to the dehydrated raw matenal. which was then stirred and dehydrated This washing step was repeated 5 to 6 times
Then, the mateπal was dned through a drier at about 120°C for about 12 hours and thereafter pulveπzed. and the particle diameters were regulaπzed to about 5 μm bv a classifier
2 cc of methyl hydrogen polysiloxane and 10 cc of normal hexane were added to 100 g of the classified plate-type zinc oxide-coated talc pigment and rotated in Super Mixer at about 3000 rpm to be mixed with each other for about 3 minutes Thereafter the mixture was dned at about 150°C for about 5 hours, to obtain silicone-treated zinc oxide-coated talc
Fig 1 is a SEM photograph of the silicone-treated zinc oxide-coated talc obtained in the aforementioned manner Fig 4 is a SEM photograph showing the plate-type zinc oxide employed in the aforementioned method Further, Fig 5 is a SEM photograph showing the raw mateπal of talc employed in the aforementioned method
Preparation of Zinc Oxide-Coated Mica
Zinc oxide-coated mica was prepared in a similar manner to the aforementioned method of prepaπng zinc oxide-coated talc, except that mica (trade name R-1000-P-2S by Kakuhachi Gyoπnpaku Co , Ltd ) was employed as a body pigment in place of talc
Fig 2 shows a SEM photograph of the obtained silicone- treated zinc oxide-coated mica Fig 6 is a SEM photograph of the mica employed as the raw mateπal
Preparation of Zinc Oxide-Coated Senate
Zinc oxide-coated senate was prepared in a similar manner to the aforementioned method of preparing zinc oxide-coated talc, except that senate (trade name Eight Pearl 300S-P-2S by Kakuhachi Gyoπnpaku Co , Ltd ) was employed as a body pigment in place of talc
Fig 3 shows a SEM photograph of the obtained silicone- treated zinc oxide-coated seπcite Fig 7 is a SEM photograph of the seπcite employed as the raw mateπal
Preparation of Zinc Oxide-Coated Titanium Oxide
Zinc oxide-coated titanium oxide was prepared in a similar manner to the aforementioned method of prepaπng zinc o.xide-coated talc, except that titanium oxide (trade name Tιtanιum-P-2S by Kakuhachi Gyoπnpaku Co , Ltd ) was employed as a body pigment in place of talc
The silicone-treated zinc oxide-coated mica, silicone-treated zinc oxide-coated talc silicone- treated zinc oxide-coated seπcite and silicone-treated zinc oxide-coated titanium oxide obtained in the aforementioned manners were employed to prescπbe the following cosmetics
Preparation Example 1
A pressed cake makeup was prescribed by blending matenals at the ratios of the following Example 1 For the purpose of compaπson, a pressed cake makeup was prepared from raw matenals of talc, seπcite and mica which were subjected to silicone treatment with no zinc oxide coating, at blending ratios shown in the following table of comparative example 1 Plate-type zinc oxide in the blending of comparative example 1 is that of raw mateπal employed for zinc oxide coating
(Example 1) silicone-treated zinc oxide-coated talc 25 0 % silicone-treated zinc oxide-coated senate 26 0 % silicone-treated zinc oxide-coated mica 10 0 % titanium oxide 10 0 % plate-tvpe titanium oxide 10 0 % nylon powder 5 0 % pigment 2 5 % silicone oil 7 5 % squalane 2 0 % lanolin 2 0 % antioxidant, paraben proper quantity
(Comparative Example 1) silicone-treated talc 200 % silicone-treated seπcite 20 8 % silicone-treated mica 8 0 % plate-type zinc oxide 12 2 % titanium oxide 10 0 % plate-type titanium oxide 10 0 % nylon powder 5 0 % pigment 2 5 % silicone oil 7 5 % squalane 2 0 % lanolin 2 0 % antioxidant. paraben proper quantity
As to the pressed cake makeups according to Example 1 and comparative example 1 obtained in the aforementioned manners, SPF values were measured The SPF values were measured by a measunng method which is set in the SPF measunng method standard of Japan Cosmetic Industry Association Table 1 shows the results
[Table 1]
Example 1 Comparative Example 1
SPF Value 17 1 11 5
As shown in Table 1, the cosmetic according to Example 1 employing the inventive zinc oxide-coated pigment exhibits an extremely high SPF value as compared with the cosmetic according to comparative example 1
Preparation Example 2
Loose powder cosmetics were prescribed in accordance with the following blending of Example 2 and comparative example 2 (Example 2) silicone-treated zinc oxide-coated talc 82 0 % silicone-treated zinc oxide-coated titanium oxide 3 0 % silicone-treated zinc o.xide-coated mica 15 0 % antioxidant, paraben proper quantity pigment proper quantity
(Comparative Example 2) silicone-treated talc 65 6 % silicone-treated titanium oxide 2 4 % silicone-treated mica 12 0 % plate-t pe zinc oxide 20 0 % antioxidant, paraben proper quantity pigment proper quantity
As to the cosmetics according to Example 2 and comparative example 2 obtained inthe aforemenuoned manners, SPF values were measured similarly to the above Table 2 shows the results of measurement
[Table 2]
Example 2 Comparative Example 2
I SPF Value 9 6 7 8
As clearly understood from Table 2, the cosmetic according to Example 2 of the present invention exhibits a high SPF value as compared with the cosmetic according to comparative example 2
Preparation Examples of other cosmetics are now descπbed
Preparation Example 3 (Liquid Foundation) octamethyl cyclotetrasiloxane 20 0 % poly(oxyethylene oxypropy lene) methvlpolysiloxane copolymer 0 5 % sor itan sesquioleate 2 0 % methylphenyl polysiloxane 5 0 % squalane 9 0 % silicone-treated zinc oxide-coated talc 80 % silicone-treated zinc oxide-coated titanium oxide 155% pigment 15 % water 335 %
1,3 butyleneglycol 50 % antioxidant, paraben proper quantity
Preparation Example 4 (Lipstick) ceresin 40% microcrystalline wax 20% candellila wax 50% paraffin wax 30% castor oil 200 % liquid lanolin 100 % refined lanolin 100% glyceryl tπoctanoate 213%
Red No.202 15%
Red No 201 05%
Yellow No 4 aluminum lake 10% titanium oxide 30% iron oxide red 20% silicone-treated zinc oxide-coated mica 100 % liquid paraffin 67% antioxidant, paraben proper quantity
Preparation Example 5 (Oilv Foundation) silicone-treated zinc oxide-coated talc 250 % silicone-treated zinc oxide-coated mica 100 % silicone-treated zinc oxide-coated titanium oxide 130% pigment 30% liquid paraffin 150% isopropyi palmitate 130% lanolin alcohol 30% microcrystalline wax 70% ozokeπte 80% antioxidant, paraben proper quantity As hereinabove described, the zinc oxide-coated body pigment according to the present invention can be blended into various cosmetics, to attain an excellent sunscreemng effect etc.
[Effect of the Invention]
The zinc oxide-coated body pigment according to the present invention, which is prepared by homogeneously sticking plate-type zinc oxide having excellent ultraviolet scatterability to the surface of a body pigment, has excellent ultraviolet scatterability. When the body pigment is blended into a cosmetic material or the like, therefore, an excellent sunscreening effect etc. can be attained without being blended with a large amount of organic ultraviolet absorbent. Therefore, it is possible to provide safe cosmetics having excellent application feeling and an excellent sunscreening effect.

Claims

WHAT IS CLAIMED IS;
1. A zinc o.xide-coated body pigment, which comprises treatment of sticking plate-type zinc oxide to the surface of a body pigment.
2. A zinc oxide-coated body pigment, which comprises sticking plate-type zinc oxide to the surface of a body by treating the body pigment with acid and alkali under the presence of the plate- type zinc oxide pigment.
3. The zinc oxide-coated body pigment in accordance with claim 1 or 2, wherein the content of said plate-type zinc oxide is 0.1 to 50 percent by weight, and the content of said body pigment is 50 to 99.9 percent by weight.
4. A cosmetic which comprises the zinc oxide-coated body pigment in accordance with claims l or 2.
5. A cosmetic which comprises the zinc oxide-coated body pigment in accordance with claim 1 or 2, wherein the content of said plate-type zinc oxide is 0.1 to 50 percent by weight, and the content of said body pigment is 50 to 99.9 percent by weight.
PCT/US1996/003589 1995-03-28 1996-03-15 Zinc oxide-coated body pigment and cosmetic material containing the same WO1996030448A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU54239/96A AU5423996A (en) 1995-03-28 1996-03-15 Zinc oxide-coated body pigment and cosmetic material contain ing the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6961095A JPH08268839A (en) 1995-03-28 1995-03-28 Zinc oxide-coated extender pigment and cosmetics containing it
JP7/69610 1995-03-28

Publications (1)

Publication Number Publication Date
WO1996030448A1 true WO1996030448A1 (en) 1996-10-03

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Family Applications (2)

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PCT/US1996/003589 WO1996030448A1 (en) 1995-03-28 1996-03-15 Zinc oxide-coated body pigment and cosmetic material containing the same
PCT/US1996/004434 WO1996030449A1 (en) 1995-03-28 1996-03-28 Zinc oxide-coated body pigment and cosmetic material containing the same

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/US1996/004434 WO1996030449A1 (en) 1995-03-28 1996-03-28 Zinc oxide-coated body pigment and cosmetic material containing the same

Country Status (4)

Country Link
JP (1) JPH08268839A (en)
AU (2) AU5423996A (en)
CO (1) CO4700415A1 (en)
WO (2) WO1996030448A1 (en)

Cited By (7)

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Publication number Priority date Publication date Assignee Title
FR2779960A1 (en) * 1998-06-23 1999-12-24 Talc De Luzenac Solid products made by impregnating a hydrophobic mineral powder such as talc with a volatile liquid binder and pressing the mixture
FR2779961A1 (en) * 1998-06-23 1999-12-24 Talc De Luzenac Solid products made by impregnating a hydrophobic mineral powder such as talc with a volatile liquid binder and pressing the mixture
FR2782638A1 (en) * 1998-08-28 2000-03-03 Shiseido International France COSMETIC USE OF FATTY ACIDS
WO2003074012A1 (en) * 2002-03-07 2003-09-12 Shiseido Co., Ltd. Composite powder, cosmetic containing the same and process for producing composite powder
EP1940422A1 (en) * 2005-09-29 2008-07-09 Raymond Lee Nip Zinc oxide coated particles, compositions containing the same, and methods for making the same
CN114901241A (en) * 2020-04-08 2022-08-12 Cqv 株式会社 Antifouling composite powder having ultraviolet blocking function and fine dust blocking function, and cosmetic composition containing same
CN114901239A (en) * 2019-12-27 2022-08-12 株式会社资生堂 Cosmetic preparation

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JP4251685B2 (en) * 1998-04-22 2009-04-08 メルク株式会社 UV absorber
AU775971B2 (en) * 1999-08-19 2004-08-19 Shiseido Company Ltd. Cosmetic sunscreen preparation
JP4834365B2 (en) * 2005-05-24 2011-12-14 積水化成品工業株式会社 Method for producing amorphous calcium phosphate-coated particles and the particles
JP4492965B2 (en) * 2005-05-24 2010-06-30 積水化成品工業株式会社 Cosmetics
JP4492961B2 (en) * 2005-05-24 2010-06-30 積水化成品工業株式会社 Cosmetics
JP2013061287A (en) * 2011-09-14 2013-04-04 Kawahara Technical Research Inc Method of producing paste, and paste
CN104017393A (en) * 2014-06-11 2014-09-03 安徽恒昊科技有限公司 Nano-zinc oxide coated sericite powder composite material and preparation method thereof

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US4956019A (en) * 1986-08-13 1990-09-11 Merck Patent Gesellschaft Mit Beschrankter Haftung Novel flaky color pigment and process for producing the same
US5156678A (en) * 1990-03-24 1992-10-20 Merck Patent Gesellschaft Mit Beschraenkter Haftung Coating with organic dyes
US5298065A (en) * 1992-03-05 1994-03-29 Tayca Corporation Ultraviolet-screening scale pigment, process for preparing the pigment and cosmetics containing the pigment
US5344488A (en) * 1991-06-24 1994-09-06 Merck Patent Gesellschaft Mit Beschrankter Haftung Pigments
US5456749A (en) * 1992-07-02 1995-10-10 Merck Patent Gesellschaft Mit Beschrankter Haftung Anti-discoloring pearly luster pigment and method of preparing the same

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US4956019A (en) * 1986-08-13 1990-09-11 Merck Patent Gesellschaft Mit Beschrankter Haftung Novel flaky color pigment and process for producing the same
US5156678A (en) * 1990-03-24 1992-10-20 Merck Patent Gesellschaft Mit Beschraenkter Haftung Coating with organic dyes
US5344488A (en) * 1991-06-24 1994-09-06 Merck Patent Gesellschaft Mit Beschrankter Haftung Pigments
US5298065A (en) * 1992-03-05 1994-03-29 Tayca Corporation Ultraviolet-screening scale pigment, process for preparing the pigment and cosmetics containing the pigment
US5456749A (en) * 1992-07-02 1995-10-10 Merck Patent Gesellschaft Mit Beschrankter Haftung Anti-discoloring pearly luster pigment and method of preparing the same

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2779960A1 (en) * 1998-06-23 1999-12-24 Talc De Luzenac Solid products made by impregnating a hydrophobic mineral powder such as talc with a volatile liquid binder and pressing the mixture
FR2779961A1 (en) * 1998-06-23 1999-12-24 Talc De Luzenac Solid products made by impregnating a hydrophobic mineral powder such as talc with a volatile liquid binder and pressing the mixture
WO1999066885A1 (en) * 1998-06-23 1999-12-29 Talc De Luzenac Solid product capable of being handled based on hydrophobic mineral powder
US6652844B1 (en) 1998-06-23 2003-11-25 Talc De Luzenac Solid product capable of being handled based on hydrophobic mineral powder
FR2782638A1 (en) * 1998-08-28 2000-03-03 Shiseido International France COSMETIC USE OF FATTY ACIDS
EP0985409A1 (en) * 1998-08-28 2000-03-15 Shiseido International France SA Cosmetic use of fatty acids
WO2003074012A1 (en) * 2002-03-07 2003-09-12 Shiseido Co., Ltd. Composite powder, cosmetic containing the same and process for producing composite powder
EP1940422A1 (en) * 2005-09-29 2008-07-09 Raymond Lee Nip Zinc oxide coated particles, compositions containing the same, and methods for making the same
EP1940422A4 (en) * 2005-09-29 2010-05-19 Raymond Lee Nip Zinc oxide coated particles, compositions containing the same, and methods for making the same
CN114901239A (en) * 2019-12-27 2022-08-12 株式会社资生堂 Cosmetic preparation
EP4082618A4 (en) * 2019-12-27 2024-01-17 Shiseido Company, Ltd. Cosmetic
CN114901241A (en) * 2020-04-08 2022-08-12 Cqv 株式会社 Antifouling composite powder having ultraviolet blocking function and fine dust blocking function, and cosmetic composition containing same

Also Published As

Publication number Publication date
AU5423996A (en) 1996-10-16
WO1996030449A1 (en) 1996-10-03
AU5381596A (en) 1996-10-16
JPH08268839A (en) 1996-10-15
CO4700415A1 (en) 1998-12-29

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