公开(公告)号：US20230306995A1

公开(公告)日：2023-09-28

申请号：US18187017

申请日：2023-03-21

Applicant: FUJIFILM Corporation

Inventor： Toshio TADA ,  Hiroyuki Suzuki ,  Megumi Nakano

IPC: G11B5/708 ,  G11B5/72 ,  G11B5/78

CPC classification number: G11B5/708 ,  G11B5/72 ,  G11B5/78

Abstract: The magnetic recording medium is used in a magnetic recording and reproducing device in which a reproduction bit size S is 40,000 nm2 or less, and a numerical value of a residual magnetic flux density Brvertical, which is expressed in a unit G, in a vertical direction of the magnetic recording medium is X or more. The X is a value calculated as X = -0.01S + 1550.

公开(公告)号：US09617492B2

公开(公告)日：2017-04-11

申请号：US15010731

申请日：2016-01-29

Applicant: FUJIFILM Corporation

Inventor： Hiroyuki Suzuki ,  Yuji Terada

IPC: C10M173/02 ,  C07C69/34 ,  C07C69/52 ,  C10M129/78 ,  C08G63/12 ,  C10M105/46 ,  C08G63/553 ,  C10M107/32 ,  C07C67/08 ,  C07C69/602 ,  C08G63/52 ,  C08G63/547 ,  C08G63/676 ,  C08G63/78 ,  C10M101/02 ,  C10M125/22

CPC classification number: C10M129/78 ,  C07C67/08 ,  C07C69/602 ,  C08G63/12 ,  C08G63/52 ,  C08G63/547 ,  C08G63/553 ,  C08G63/676 ,  C08G63/78 ,  C10M101/02 ,  C10M105/46 ,  C10M107/32 ,  C10M125/22 ,  C10M2203/1006 ,  C10M2205/0285 ,  C10M2207/0406 ,  C10M2207/2815 ,  C10M2207/2825 ,  C10M2207/2835 ,  C10M2207/2845 ,  C10M2207/2855 ,  C10M2207/3045 ,  C10M2207/401 ,  C10M2209/1023 ,  C10M2213/0606 ,  C10M2229/025 ,  C10N2230/06 ,  C10N2240/02 ,  C10N2240/08 ,  C10N2240/10 ,  C10N2240/12 ,  C10N2240/121 ,  C10N2240/30 ,  C10N2240/40 ,  C10N2240/401 ,  C10N2240/402 ,  C10N2250/10 ,  C10N2250/18

Abstract: An object of the present invention is to provide a lubricant which has excellent lubrication performance and is able to exhibit excellent lubrication performance even when under extreme pressure conditions. The present invention relates to a complex polyester composition containing polyester obtained by condensing polyhydric alcohol having at least two hydroxyl groups, a dicarboxylic acid having 44 carbon atoms, and monohydric alcohol. Further, the present invention relates to a lubricant composition containing the complex polyester composition, and a lubricant and a production method for a complex polyester composition.

公开(公告)号：US09251832B2

公开(公告)日：2016-02-02

申请号：US14223139

申请日：2014-03-24

Applicant: FUJIFILM Corporation

Inventor： Hiroyuki Suzuki ,  Toshio Tada

IPC: G11B5/708 ,  G11B5/706 ,  H01F1/11

CPC classification number: G11B5/70678 ,  H01F1/11 ,  Y10T428/2982

Abstract: An aspect of the present invention relates to hexagonal ferrite magnetic powder, which has an activation volume ranging from 900 nm3 to 1,600 nm3, and a ratio of a coefficient of plate thickness variation to a coefficient of particle diameter variation, coefficient of plate thickness variation/coefficient of particle diameter coefficient, ranging from 0.20 to 0.60.

Abstract translation: 本发明的一个方面涉及六方晶系铁氧体磁粉，其活性体积范围为900nm 3至1600nm 3，并且板厚变化系数与粒径变化系数之比，板厚变化系数/ 粒径系数系数为0.20〜0.60。

公开(公告)号：US09251833B2

公开(公告)日：2016-02-02

申请号：US14022554

申请日：2013-09-10

Applicant: FUJIFILM Corporation

Inventor： Hiroyuki Suzuki ,  Nobuo Yamazaki

IPC: H01F1/11 ,  G11B5/62 ,  G11B5/706 ,  G11B5/714 ,  G11B5/84 ,  G11B5/712 ,  H01F1/03 ,  B82Y30/00 ,  C01G49/00 ,  C04B35/26 ,  C04B35/626 ,  C04B35/628

CPC classification number: G11B5/712 ,  B82Y30/00 ,  C01G49/0018 ,  C01G49/0036 ,  C01P2006/12 ,  C01P2006/42 ,  C04B35/2683 ,  C04B35/6262 ,  C04B35/62665 ,  C04B35/62813 ,  C04B2235/3215 ,  C04B2235/3218 ,  C04B2235/3251 ,  C04B2235/3274 ,  C04B2235/3275 ,  C04B2235/3284 ,  C04B2235/3409 ,  C04B2235/5409 ,  C04B2235/5454 ,  C04B2235/767 ,  G11B5/70678 ,  G11B5/714 ,  H01F1/0315 ,  H01F1/11 ,  Y10T428/2982

Abstract: An aspect of the present invention relates to a method of manufacturing a hexagonal ferrite magnetic particle comprising melting an Al-containing starting material mixture to prepare a melt and quenching the melt to obtain an amorphous material; subjecting the amorphous material to heat treatment to cause a hexagonal ferrite magnetic particle to precipitate in a product obtained by the heat treatment; collecting a hexagonal ferrite magnetic particle by subjecting the product to treatment with an acid and washing, wherein the hexagonal ferrite magnetic particle collected has a particle size ranging from 15 to 30 nm, comprises 0.6 to 8.0 weight percent of Al, based on Al2O3 conversion, relative to a total weight of the particle, and Al adheres to a surface of the hexagonal ferrite magnetic particle.

公开(公告)号：US11894171B2

公开(公告)日：2024-02-06

申请号：US16683301

申请日：2019-11-14

Applicant: DOWA ELECTRONICS MATERIALS CO., LTD. ,  FUJIFILM Corporation

Inventor： Hirohisa Omoto ,  Shuji Kaneda ,  Satoshi Shiki ,  Hiroyuki Suzuki ,  Toshio Tada

IPC: H01F1/34 ,  C09C1/24 ,  H01F1/11

CPC classification number: H01F1/348 ,  C09C1/24 ,  H01F1/11 ,  C01P2002/76 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/84 ,  C01P2006/42

Abstract: Provided is an Al-containing hexagonal ferrite magnetic powder which produces an excellent durability-improving effect on a magnetic recording medium, wherein uniform pulverization of the magnetic powder can be easily achieved by dispersion treatment in preparation of a magnetic coating material even in cases where the magnetic powder has a small primary particle size or has a composition which is likely to produce hard secondary particles. The magnetic powder for a magnetic recording medium is an Al-containing hexagonal ferrite magnetic powder having an Al/Fe molar ratio of 0.030 to 0.200, and has a particle size distribution in which the volume ratio of particles having a particle size of 30 μm or more as measured by a laser diffraction particle size distribution analyzer with a dispersion pressure of 100 kPa is 5.0% or less, and an activation volume Vact of 1800 nm3 or less.

公开(公告)号：US09834736B2

公开(公告)日：2017-12-05

申请号：US15183062

申请日：2016-06-15

Applicant: FUJIFILM Corporation ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Toshiki Fujiwara ,  Hiroyuki Suzuki ,  Saisuke Watanabe ,  Ippei Fukutomi ,  Motoichi Murakami ,  Tetsushi Suzuki

IPC: C10M169/04

CPC classification number: C10M169/041 ,  C10M169/044 ,  C10M2203/024 ,  C10M2203/1006 ,  C10M2205/0285 ,  C10M2207/2805 ,  C10M2207/2835 ,  C10M2209/102 ,  C10M2209/11 ,  C10M2209/111 ,  C10M2219/068 ,  C10M2223/043 ,  C10M2223/045 ,  C10M2223/047 ,  C10N2210/02 ,  C10N2210/06 ,  C10N2220/022 ,  C10N2230/02 ,  C10N2230/06 ,  C10N2230/08 ,  C10N2230/54 ,  C10N2230/68 ,  C10N2230/74 ,  C10N2240/10 ,  C10N2260/02

Abstract: A lubricating oil composition for internal combustion engines of passenger and commercial four-wheeled vehicles is provided which can exhibit excellent fuel efficiency performance and wear resistance reliability. The lubricating oil composition includes a base oil and a complex polyester mixture. The base oil includes at least one of poly-α-olefin, an ester-based base oil, or a partially hydrogenated mineral oil. The complex polyester mixture includes a polyester obtained by condensing a polyhydric alcohol, a polycarboxylic acid, and a monohydric alcohol having an oxyalkylene group. The content of the complex polyester mixture is 0.01% by mass or more with respect to the total mass of the lubricating oil composition, the high-temperature shear viscosity (HTHS viscosity) at 150° C. is 1.0 mPa·s to 2.6 mPa·s, and the NOACK evaporation amount is 40% or less.

公开(公告)号：US09690195B2

公开(公告)日：2017-06-27

申请号：US14519542

申请日：2014-10-21

Applicant: FUJIFILM Corporation

Inventor： Hiroyuki Suzuki

IPC: G03F7/00 ,  G03F7/038 ,  G03F7/004 ,  G03F7/11 ,  G03F7/32 ,  G03F7/09 ,  G03F7/027 ,  G03F7/085 ,  G03F7/033 ,  G03F7/30 ,  C08F220/60

CPC classification number: G03F7/0388 ,  C08F2220/603 ,  C08F2220/606 ,  G03F7/00 ,  G03F7/004 ,  G03F7/027 ,  G03F7/033 ,  G03F7/038 ,  G03F7/085 ,  G03F7/09 ,  G03F7/092 ,  G03F7/11 ,  G03F7/30 ,  G03F7/3042 ,  G03F7/32 ,  G03F7/322

Abstract: Lithographic printing plates and processes for preparing the lithographic printing plates are provided. The plates have excellent printing durability, staining resistance and staining resistance over time. The lithographic printing plate precursor includes: a substrate; a photosensitive layer provided on the substrate; and an extra layer optionally provided between the substrate and the photosensitive layer. The photosensitive layer or the extra layer adjacent to the substrate contains (A) a copolymer. The copolymer (A) includes: (a1) a repeating unit of formula (a1-1) below in a side chain, and (a2) a repeating unit having at least one of the structures represented by formulae (a2-1) to (a2-6) shown in the specification in a side chain. L1, Z1, R1, and R21, R22 and R23 in formula (a1-1) and the variables in formulae (a2-1) to (a2-6) are as defined in the specification.

公开(公告)号：US09583129B2

公开(公告)日：2017-02-28

申请号：US14464024

申请日：2014-08-20

Applicant: FUJIFILM Corporation

Inventor： Masahiko Mori ,  Hiroyuki Suzuki

IPC: H01F1/11 ,  G11B5/706 ,  G11B5/842

CPC classification number: G11B5/842 ,  G11B5/70678 ,  H01F1/11

Abstract: An aspect of the present invention relates to a method of manufacturing hexagonal ferrite magnetic powder. The method of manufacturing hexagonal ferrite magnetic powder comprises wet processing hexagonal ferrite magnetic particles obtained following acid treatment in a water-based solvent to prepare an aqueous magnetic liquid satisfying relation (1) relative to an isoelectric point of the hexagonal ferrite magnetic particles: pH0−pH*≧2.5, wherein, pH0 denotes the isoelectric point of the hexagonal ferrite magnetic particles and pH* denotes a pH of the aqueous magnetic liquid, which is a value of equal to or greater than 2.0, adding a surface-modifying agent comprising an alkyl group and a functional group that becomes an anionic group in the aqueous magnetic liquid to the aqueous magnetic liquid to subject the hexagonal ferrite magnetic particles to a surface-modifying treatment, and removing the water-based solvent following the surface-modifying treatment to obtain hexagonal ferrite magnetic particles.

Abstract translation: 本发明的一个方面涉及六角铁氧体磁粉的制造方法。 制造六方晶系铁氧体磁粉的方法包括：在水性溶剂中进行酸处理后得到的湿法加工六方晶系铁氧体磁性颗粒，以制备相对于六方晶系铁氧体磁性颗粒的等电点满足关系式（1）的水性磁性液体：pH0- pH *≥2.5，其中，pH0表示六方晶系铁氧体磁性颗粒的等电点，并且pH *表示水性磁性液体的pH值等于或大于2.0，加入表面改性剂包括 烷基和在含水磁性液体中成为阴离子基团的官能团，以使六方晶系铁氧体磁性颗粒进行表面改性处理，并且在表面改性处理之后除去水性溶剂以获得 六角铁氧体磁性颗粒。

公开(公告)号：US08895224B2

公开(公告)日：2014-11-25

申请号：US13975978

申请日：2013-08-26

Applicant: FUJIFILM Corporation

Inventor： Hiroyuki Suzuki ,  Junya Abe ,  Takafumi Nakayama ,  Kohei Takeshita

IPC: C08F290/14 ,  G03C1/00 ,  G03C5/00 ,  G03C1/66 ,  G03F7/00 ,  G03F7/26 ,  B41N1/00 ,  G03F7/11 ,  G03F7/32 ,  G03F7/09 ,  G03F7/004 ,  G03F7/30

CPC classification number: G03F7/0388 ,  C08F2220/603 ,  C08F2220/606 ,  G03F7/00 ,  G03F7/004 ,  G03F7/027 ,  G03F7/033 ,  G03F7/038 ,  G03F7/085 ,  G03F7/09 ,  G03F7/092 ,  G03F7/11 ,  G03F7/30 ,  G03F7/3042 ,  G03F7/32 ,  G03F7/322

Abstract: Lithographic printing plates and processes for preparing the lithographic printing plates are provided. The plates have excellent printing durability, staining resistance and staining resistance over time. The lithographic printing plate precursor includes: a substrate; a photosensitive layer provided on the substrate; and an extra layer optionally provided between the substrate and the photosensitive layer. The photosensitive layer or the extra layer adjacent to the substrate contains (A) a copolymer. The copolymer (A) includes: (a1) a repeating unit of formula (a1-1) below in a side chain, and (a2) a repeating unit having at least one of the structures represented by formulae (a2-1) to (a2-6) shown in the specification in a side chain. L1, Z1, R1, and R21, R22 and R23 in formula (a1-1) and the variables in formulae (a2-1) to (a2-6) are as defined in the specification.

Abstract translation: 提供了平版印刷版和用于制备平版印刷版的方法。 这些板材具有优异的印刷耐久性，耐污染性和耐污染性。 平版印刷版原版包括：基材; 设置在基板上的感光层; 以及可选地设置在基底和感光层之间的额外层。 感光层或与基材相邻的附加层含有（A）共聚物。 共聚物（A）包括：（a1）侧链中下述式（a1-1）的重复单元，（a2）具有式（a2-1）〜（ a2-6）在侧链中示出。 式（a1-1）中的L1，Z1，R1和R21，R22和R23，式（a2-1）至（a2-6）中的变量如本说明书中所定义。

公开(公告)号：US09818517B2

公开(公告)日：2017-11-14

申请号：US14224726

申请日：2014-03-25

Applicant: FUJIFILM Corporation

Inventor： Toshio Tada ,  Hiroyuki Suzuki ,  Osamu Shimizu

IPC: G11B5/708 ,  H01F1/11 ,  G11B5/706

CPC classification number: H01F1/11 ,  G11B5/70615 ,  G11B5/70678

Abstract: Hexagonal ferrite magnetic particles have an activation volume ranging from 1,000 nm3 to 1,500 nm3, and ΔE10%/kT, thermal stability at 10% magnetization reversal, is equal to or greater than 40.