公开(公告)号：JPH10204318A

公开(公告)日：1998-08-04

申请号：JP2577897

申请日：1997-01-23

Applicant: KAO CORP

Inventor： YODA KOJI ,  NARITA MASAYUKI ,  YUZAWA MASAYUKI ,  SAKAGUCHI MIKIO

IPC: C01G49/00 ,  C09C1/22 ,  C09C3/06

Abstract: PROBLEM TO BE SOLVED: To obtain a red pigment controlled in the spectral reflectance of the pigment itself and being capable of controlling the spectral reflectance of a cosmetic containing the pigment by using a complex oxide of Ca and Fe. SOLUTION: This pigment comprises a double oxide of the formula: Cax Fey Ox+(3y/2) (wherein x is 0.6-2; and y is 2-3). By controlling the deflection point wavelength (the wavelength at which the first-order differential derivative function of a spectral reflectance curve has a maximum volue or the second- order differential derivative function shows 0) of a spectral reflectance curve obtained by measuring the spectral reflectance of the pigment to 600-640nm, e.g. a cosmetic containing this pigment gives a spectral reflectance curve having a hollow in a wavelength region of 500-620nm. The healthy skin gives a spectral reflectance curve having a hollow at a wavelength of 500-620nm, whereas the darkish skin gives a spectral curve having a shallow hollow at 500-620nm. Therefore, the compound oxide in an amount to give a concentration of 5wt.% is mixed with a body pigment to obtain a red pigment which gives a spectral reflectance curve having a hollow at 500-620nm.

公开(公告)号：JPH07330334A

公开(公告)日：1995-12-19

申请号：JP11984394

申请日：1994-06-01

Applicant: KAO CORP

Inventor： YUZAWA MASAYUKI ,  YODA KOJI ,  NAKAMURA HIROKO ,  SAKAGUCHI MIKIO

IPC: C01G9/02 ,  C09K3/00

Abstract: PURPOSE:To obtain ultraviolet rays-absorbing powder excellent in transparency and ultraviolet ray-absorbing property and suitable as a blend component for cosmetics, coatings, etc., by including zinc oxide powder having a specific form and one or more trace elements. CONSTITUTION:An alkali solution is added under vigorous stirring so as to keep pH to >=11 to a solution obtained by dissolving 0.005-1.0mol salt containing one or more elements selected from iron, zirconium, calcium, germanium, manganese or yttrium or zinc and 0.05-1.0mol water-soluble alkali metal salt into water for 1-300sec, based on 100mol zinc salt to produce precipitate. As necessary, the precipitate is subjected to aging treatment at 60-100 deg.C for 30min to 5hr and washed with water, filtered to collect the precipitate and the precipitate is dried at 200-300 deg.C for 1-20hr. Thereby, laminar oxide zinc powder having 0.1-1mum average particle diameter and 0.005-0.2mum average particle thickness and >=3 average plate ratio and a trace element bound and retained on the surface or in the interior of the zinc oxide powder and integrated with the zinc oxide powder are included in the powder.

公开(公告)号：JPH0812526A

公开(公告)日：1996-01-16

申请号：JP14907494

申请日：1994-06-30

Applicant: KAO CORP

Inventor： YAMAKI KAZUHIRO ,  SUGAWARA SATOSHI ,  SUZUKI YUJI ,  YUZAWA MASAYUKI ,  YODA KOJI

IPC: A61K8/30 ,  A61K8/00 ,  A61K8/19 ,  A61K8/27 ,  A61K8/34 ,  A61K8/89 ,  A61K8/891 ,  A61Q1/02 ,  A61Q17/04 ,  C08L83/12 ,  A61K7/02 ,  A61K7/42

Abstract: PURPOSE:To obtain a skin external preparation excellent in ultraviolet light- screening ability and transparency, developing no whitish spots, also feeling well when applied. CONSTITUTION:This skin external preparation contains flaky zinc oxide powder >=0.1mum but =3 in average lamella ratio, 0.005-1.0mol, based on 100mol of the zinc, of divalent or higher valent element(s) except the zinc integrated with said flaky zinc oxide powder, and powder >=70% in light transmittance at a wavelength of 500nm.

公开(公告)号：JPH05101917A

公开(公告)日：1993-04-23

申请号：JP8957092

申请日：1992-03-13

Applicant: KAO CORP

Inventor： IGAKI MICHIHITO ,  YUZAWA MASAYUKI ,  ARITA TOSHIHARU ,  FUJII SHIGEO ,  AOKI YOSHIO

IPC: H01F1/06 ,  C09D5/23 ,  C09D7/12 ,  G11B5/66 ,  G11B5/706

Abstract: PURPOSE:To obtain metallic magnetic powder of high coercive force by providing the specified layer by bivalent transition metal compound, etc., on the surface of the hydroxide iron particles of needle crystals so as to cover it, and then, heating the hydroxide iron particles in an inert gas air current so as to form a ferrite free of hydration ports, and heating this ferrite so as to reduce it. CONSTITUTION:This relates to the manufacture of metallic magnetic powder, which covers the surface of the hydroxide iron particle of a needle crystal with a mixture layer which contains bivalent transition metal compounds and carbon compounds having adsorbing ability to the hydroxide iron particles of needle crystals, and then, making the needle crystal particle into a ferrite free of dehydration holes, and next, heating and reducing this ferrite, and a film for a magnetic record medium, which contains this metallic magnetic powder. The, metallic magnetic powder of high coercive force and narrow in coercive force distribution can be obtained, and also a film for magnetic record medium excellent in oxidation resistance can be manufactured using this metallic magnetic powder.

公开(公告)号：JPH11189766A

公开(公告)日：1999-07-13

申请号：JP36144297

申请日：1997-12-26

Applicant: KAO CORP

Inventor： YUZAWA MASAYUKI ,  SAKAMOTO ICHIRO ,  SAKAMOTO EMI ,  SAKAGUCHI MIKIO

IPC: A61K8/00 ,  A61K8/24 ,  A61Q17/04 ,  C01B25/38 ,  C09K3/00

Abstract: PROBLEM TO BE SOLVED: To obtain the subject ultraviolet absorber excellent in transparency, absorptivity of ultraviolet rays of UV-A and UV-B, and having extremely low photocatalytic activities by using a ceric phosphate-based compound in a specific composition as an active ingredient. SOLUTION: This ultraviolet absorber is the one of formula I [M is a cationic element or a cationic group; A is an anionic element or an anionic group; 0.2

公开(公告)号：JPH05144620A

公开(公告)日：1993-06-11

申请号：JP11399292

申请日：1992-04-06

Applicant: KAO CORP

Inventor： IGAKI MICHIHITO ,  YUZAWA MASAYUKI ,  ICHIKAWA HIROTSUGU ,  NAKAMURA HIROYUKI ,  AOKI YOSHIO

IPC: B22F1/00 ,  B22F1/02 ,  H01F1/06

Abstract: PURPOSE:To manufacture a coated film for a magnetic recording medium having remarkably excellent oxidation resistance by obtaining metallic magnetic powder having high coercive force and narrow coercive force distribution and using the powder obtained in this manner. CONSTITUTION:A method for manufacturing metallic magnetic powder comprises the steps of covering surfaces of acicular crystal hydrate iron oxide particles with a mixture layer containing at least bivalent transition metal compound, ferriting the acicular crystal particles substantially without dehydration pores, and then heating to reduce the ferrite. A coated film for a magnetic recording medium contains the metallic magnetic powder obtained by the method.

公开(公告)号：JPH08310913A

公开(公告)日：1996-11-26

申请号：JP11821495

申请日：1995-05-17

Applicant: KAO CORP

Inventor： SUGAWARA SATOSHI ,  YAMAKI KAZUHIRO ,  SUZUKI YUJI ,  YODA KOJI ,  SAKAGUCHI MIKIO ,  YUZAWA MASAYUKI

IPC: A61K8/19 ,  A61K8/00 ,  A61K8/02 ,  A61K8/18 ,  A61K8/28 ,  A61K8/29 ,  A61K8/30 ,  A61K8/89 ,  A61K8/891 ,  A61Q1/00 ,  A61Q1/02 ,  A61Q1/12 ,  A61Q17/04 ,  C08L83/04 ,  C08L83/12 ,  A61K7/00 ,  A61K7/02 ,  A61K7/42 ,  A61K7/44

Abstract: PURPOSE: To obtain the subject cosmetic excellent in an ultraviolet light- preventing ability and good in safety and stability. CONSTITUTION: An ultraviolet light-preventing cosmetic contains (a) particles comprising a double oxide having a perovskite type structure of formula: ABO3 (A, B are each a metallic element; O is oxygen element) or its solid solution and having a volume-average particle diameter of

公开(公告)号：JPH0693313A

公开(公告)日：1994-04-05

申请号：JP27359692

申请日：1992-09-16

Applicant: KAO CORP

Inventor： YUZAWA MASAYUKI ,  ARITA TOSHIHARU ,  AOKI YOSHIO

IPC: B22F1/00 ,  B22F9/22 ,  H01F1/06

Abstract: PURPOSE:To obtain a magnetic metal powder excellent in oxidation resistance and magnetic characteristics. CONSTITUTION:Metallic and/or nonmetallic compd. layers are formed on the surface of a needle-crystal hydrous iron oxide, aluminum and/or silicon compd. layers are formed thereon, and the product is theramlly reduced to produce the magnetic metal powder. In this case, a system to be treated is kept at pH11-13 and

公开(公告)号：JPH08225316A

公开(公告)日：1996-09-03

申请号：JP5808995

申请日：1995-02-21

Applicant: KAO CORP

Inventor： YUZAWA MASAYUKI ,  SAKAMOTO EMI ,  SAKAGUCHI MIKIO ,  YODA KOJI

IPC: A61K8/19 ,  A61K8/02 ,  A61K8/23 ,  A61K8/25 ,  A61K8/26 ,  A61K8/27 ,  C01B33/26 ,  C01F7/02 ,  C01F11/46 ,  C08K3/00 ,  C08K7/16 ,  C08K7/18

Abstract: PURPOSE: To provide the subject powder having transparency and high light- scattering property and, accordingly, useful as an additive for cosmetics, etc., effective for masking the wrinkles while preventing the white appearance. CONSTITUTION: This spherical inorganic powder has a refractive index of 1.5-2.0, a volume-average particle diameter of 0.1-4μm and a transmitted light scattering ratio of >=70% and a total transmittance of >=80%. The transmitted light scattering ratio and the total transmittance are defined by the formulas, Td/(Tp+ Td)}×100 and (Tp+Td), respectively, wherein Tp is a parallel light transmittance and Td is a scattered light transmittance measured by a haze meter on a thin film produced by uniformly dispersing a specimen in a dispersion medium having a refractive index of 1.4-1.5 at a concentration of 20wt.% and forming a thin film having a thickness of 15μm.

公开(公告)号：JPH08209109A

公开(公告)日：1996-08-13

申请号：JP4347795

申请日：1995-02-07

Applicant: KAO CORP

Inventor： YODA KOJI ,  YUZAWA MASAYUKI ,  SAKAGUCHI MIKIO

IPC: A61K8/00 ,  A61K8/23 ,  A61Q5/00 ,  A61Q17/04 ,  C09K3/00 ,  C30B29/24 ,  A61K7/06 ,  A61K7/42

Abstract: PURPOSE: To obtain an ultraviolet absorber weak in photocatalytic activity, excellent in ultraviolet absorption capability and high in transparency in the visible light range. CONSTITUTION: This ultraviolet absorber comprises particles of a double oxide having a perovskite structure and represented by the general formula: ABO3 (wherein A and B are each a metal element; and O is an oxygen element) or its solid soln., wherein the vol.-average particle size thereof is at most 1μm and the crystallite size thereof as measured by X-ray diffraction is 150 to 300Å.