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公开(公告)号：JP2001288455A
公开(公告)日：2001-10-16
申请号：JP2000345113
申请日：2000-11-13
Applicant: KAO CORP
Inventor： NAITO KOICHI , HAGIWARA TOSHIYA , FUJII SHIGEO
Abstract: PROBLEM TO BE SOLVED: To provide a polishing liquid composition which improves the polishing speed, decreases the surface defects such as scratches or pits, and improves the surface smoothness such as surface roughness (Ra) and waviness (Wa); a polishing method using the composition; and a magnetic disk substrate improved in surface smoothness such as surface roughness (Ra) and waviness (Wa) and a method for producing the same. SOLUTION: There are provided a polishing liquid composition [1] containing silica particles, water, and an Fe salt and/or an Al salt of a polyaminocarboxylic acid; a polishing liquid composition [2] containing an inorganic acid and/or an organic acid in addition to all the ingredients contained in composition [1]; a polishing method using composition [1] or [2]; a method for producing a magnetic disk substrate having a polishing step using composition [1] or [2]; and a magnetic disk substrate produced by using composition [1] or [2].
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公开(公告)号：JP2000309796A
公开(公告)日：2000-11-07
申请号：JP11798699
申请日：1999-04-26
Applicant: KAO CORP
Inventor： KITAZAWA KOZO , TAMURA ATSUSHI , HASHIMOTO RYOICHI , FUJII SHIGEO
IPC: B24B53/017 , C11D1/04 , C11D1/12 , H01L21/304 , B24B37/00
Abstract: PROBLEM TO BE SOLVED: To obtain a detergent composition which is effective in cleaning a pad, such as a polishing pad dirtied by solid dirt in a polishing liquid, by using an anionic surfactant. SOLUTION: Preferably, the anionic surfactant is a compound containing at least five of at least one kind of groups selected from among -COOR and -SO3R (wherein R is H or an inorganic or organic group) groups and having a solubility (at 25 deg.C) of 0.05 g or higher in 100 g water and a mol.wt. of 500-300,000. The surfactant may be used as it is or as an aqueous solution preferably with a concentration of 0.01-95 wt.%. When a chelating agent is compounded, the detergency against solid dirt is improved. Preferably, the pH of the composition is 2-13. Still preferably, a nonionic surfactant having a 1-20C linear or cyclic saturated or unsaturated hydrocarbon group and a polyoxyalkylene alkyl oxide group is compounded.
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公开(公告)号：JPH1161207A
公开(公告)日：1999-03-05
申请号：JP21375097
申请日：1997-08-07
Applicant: KAO CORP
Inventor： FUJII SHIGEO , IGAKI MICHIHITO , ICHIKAWA HIROTSUGU , KAWABUCHI KENJI
Abstract: PROBLEM TO BE SOLVED: To provide a method of manufacture of a magnetic metal powder having high saturation magnetization, excellent in remanence ratio and SFD as well as in corrosion resistance and dispersibility, and usable suitably for manufacture of a magnetic coating film and also to provide a coating film for magnetic recording medium, containing the magnetic metal powder manufactured by the above method. SOLUTION: In the method of manufacture of the magnetic metal powder for magnetic recording medium, heating reduction treatment is performed in such a manner that the concentration of water vapor in a formed gas becomes
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公开(公告)号：JPH09245788A
公开(公告)日：1997-09-19
申请号：JP4466996
申请日：1996-03-01
Applicant: KAO CORP
Inventor： NAKANISHI KUNIYUKI , FUJII SHIGEO , ISSHIKI NOBUYUKI , SUZUKI ATSUSHI , KAJIURA YOSHIO
IPC: H01M10/05 , H01M4/587 , H01M10/0525 , H01M10/0566 , H01M4/58 , H01M10/40
Abstract: PROBLEM TO BE SOLVED: To provide a non-aqueous secondary battery with its superior discharge capacity by burning a thermosetting resin and providing a glass-shaped carbon material with a specified atom number ratio and specific surface area of hydrogen and carbon as a negative electrode material of a non-aqueous battery. SOLUTION: A glass-shaped carbon material in which thermosetting resin is burned is used for a negative electrode material for non-aqueous battery. In this carbon material, the atom number ratio between hydrogen and carbon (H/C) is 0.15 to 0.5, and the specific surface with the BET method is 100 to 500m /g. Furthermore, in the case of the glass-shaped carbon material it is preferable that the intra-planar interval doo2 is 3.37Å or more and the crystal size Lc is 50Å or less. In addition, it is preferable that the glass-shaped carbon material is 2.0g/cm in the degree of vacuum and 0.1 to 50μm in particle size. The thermosetting resin preferably uses a copolycondensation body of phenol, furfurly alcohol, and formaldehyde.
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公开(公告)号：JPH09128740A
公开(公告)日：1997-05-16
申请号：JP28603595
申请日：1995-11-02
Applicant: KAO CORP
Inventor： FUJII SHIGEO , ITAN MICHIHITO
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording medium having excellent electromagnetic conversion characteristics, such as frequency characteristics, and preservable stability and with which the recording of a higher density is possible. SOLUTION: This medium has a base 2 and a magnetic layer 3 on this base 2 and this magnetic layer 2 contains ferromagnetic metallic powder and a binder. The surface roughness of the magnetic layer 3 is =0.85 and the residual magnetic flux density thereof is >=2600 gauss. The attenuation factor ΔBs (the change rate of the saturation magnetic flux density Bs' after resting for 30 days under the environment of 60 deg.C and 90% relative humidity to the saturation magnetic flux density Bs of the magnetic layer before the resting and is the value expressed by ΔBs=(1-Bs'/Bs)×100) of the raturation magnetic flux density is =70wt.%.
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Patent Agency Ranking
公开(公告)号：JPH08183618A
公开(公告)日：1996-07-16
申请号：JP33957394
申请日：1994-12-28
Applicant: KAO CORP
Inventor： FUJII SHIGEO , IKEGUCHI MASAAKI
Abstract: PURPOSE: To obtain fusiform iron oxide granules having high fillability, high coercive force and narrow coercive force distribution and fit to produce a magnetic recording medium having satisfactory surface properties. CONSTITUTION: Fusiform iron oxide hydrate powder or fusiform iron oxide powder having 0.05-0.3μm major axis size of primary particles and an axial ratio of 4-12 is granulated to obtain the objective fusiform iron oxide hydrate granules or fusiform iron oxide granules having 1-20mm average diameter and 0.15-0.4g/cm bulk density.
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公开(公告)号：JPH07179913A
公开(公告)日：1995-07-18
申请号：JP34768893
申请日：1993-12-24
Applicant: KAO CORP
Inventor： FUJII SHIGEO , NAKANISHI KUNIYUKI
Abstract: PURPOSE:To produce a magnetic metal powder suitable to the production of a coating film for a magnetic recording medium enhanced in coercive force and corrosion resistance and excellent in dispersibility, squareness ratio and SFD. CONSTITUTION:A metal precursor with >=1 layer of metal compd. and/or non- metal compd. formed on the surface of needle-crystal or spindle-shaped hydrous iron oxide while using an anionic org. dispersant, as required, is prepared, and then the precursor is heated and reduced to produce a magnetic metal powder. In this case, the precursor being prepared is treated with a high molecular compd. having >=1 kind among amino, imino and amide groups to produce the magnetic metal powder. A coating film for a magnetic recording medium excellent in squareness ratio and SFD is obtained by using the magnetic metal powder.
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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
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.
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公开(公告)号：JPS61179263A
公开(公告)日：1986-08-11
申请号：JP2025485
申请日：1985-02-05
Applicant: KAO CORP
Inventor： FUJII SHIGEO , WAKASA MASANOBU , TAKEDA TSUNESHI
Abstract: PURPOSE:To obtain a pigment which has excellent resistance to water, solvents, oxidation and light and safety and gives a clear color, by bringing a porous alumina contg. an anion into contact with an org. dye soln. and then sealing pores. CONSTITUTION:A porous alumina contg. 0.1mol/kg or more of an anion is brought into contact with an org. dye soln. to enclose a dye in pores, and the pores contg. the dye are sealed. Any of porous alumina contg. 0.1mol/kg or more of an anion and having pores capable of enclosing an org. dye molecule therein may be used, but one having a specific surface area of 10m /g or above is preferred to enclose the dye molecule therein. As the anion, chloride and sulfate ions are particularly preferred.
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公开(公告)号：JP2008142839A
公开(公告)日：2008-06-26
申请号：JP2006333399
申请日：2006-12-11
Inventor： SUENAGA KENICHI , FUJII SHIGEO
Abstract: PROBLEM TO BE SOLVED: To provide a method of manufacturing a magnetic disk substrate, which reduces the small waviness of a substrate after polishing and also prevents aluminum oxide particles from piercing the substrate. SOLUTION: This method of manufacturing a magnetic disk substrate comprises a step of polishing a substrate to be polished by using a polishing fluid composition containing aluminum oxide particles and water and a polishing pad. In the polishing fluid composition, the volumetrically intermediate particle size of the secondary particles of the aluminum oxide particles is 0.1 to 0.7 μm, and the content of the particles of 1 μm or larger contained in the aluminum oxide particles is 0.2 wt.% or less. In the polishing pad, the average pore diameter of the pore part on the surface of the pad is 60 μm or less, the ratio of the area of the pore part to the surface area of the pad is 60% or less, and the compressibility is 3-20%. COPYRIGHT: (C)2008,JPO&INPIT
Abstract translation: 要解决的问题：提供一种制造磁盘基板的方法，其减少抛光后的基板的小波纹度并且还防止氧化铝颗粒刺穿基板。 解决方案：这种制造磁盘基板的方法包括通过使用包含氧化铝颗粒和水的抛光液组合物和抛光垫来抛光待抛光的基板的步骤。 在研磨液组合物中，氧化铝粒子的二次粒子的体积中等粒径为0.1〜0.7μm，氧化铝粒子中所含的1μm以上的粒子的含量为0.2重量％以下 。 在抛光垫中，焊盘表面的孔部的平均孔径为60μm以下，孔部的面积与焊盘的表面积的比例为60％以下，压缩率 是3-20％。 版权所有（C）2008，JPO＆INPIT
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