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1.发明申请MAGNETIC RECORDING MEDIUM AND MAGNETIC COATING COMPOSITION FOR MAGNETIC RECORDING MEDIUM 有权用于磁记录介质的磁记录介质和磁性涂料组合物公开(公告)号：US20150279404A1
公开(公告)日：2015-10-01
申请号：US14673144
申请日：2015-03-30
Applicant: FUJIFILM Corporation
Inventor： Toshihide AOSHIMA , Wataru KIKUCHI , Kazutoshi KATAYAMA , Tatsuo MIKAMI
CPC classification number: G11B5/7021 , G11B5/7013 , G11B5/7023 , G11B5/714
Abstract: An aspect of the present invention relates to a magnetic recording medium, which comprises a magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic support, wherein the magnetic layer further comprises a compound which has a weight average molecular weight of equal to or more than 1,000 but less than 20,000 and is denoted by formula (1): wherein, in formula (1), A1 denotes a monovalent polymer group, each of R1 and R2 independently denotes a single bond or a divalent connecting group, R11 denotes a hydrogen atom or a monovalent substituent, m denotes an integer of equal to or greater than 2, multiple instances of R1, R2, A1, and R11 that are present can be identical or different, A2 denotes a hydrogen atom or a monovalent substituent denoted by —OR3—Z, R3 denotes a single bond or a divalent connecting group, Z denotes a monovalent acid group, among multiple instances of A2 that are present, at least one denotes a monovalent group denoted by —O—R3—Z, and X denotes a connecting group of valence m.
Abstract translation: 本发明的一个方面涉及一种磁记录介质，其包括在非磁性载体上包含铁磁粉末和粘合剂的磁性层，其中所述磁性层还包含重均分子量等于或大于1,000的化合物 但小于20,000，由式（1）表示：其中，在式（1）中，A1表示一价聚合物基团，R 1和R 2各自独立地表示单键或二价连接基团，R 11表示氢原子或 一价取代基，m表示2以上的整数，存在的R 1，R 2，A 1和R 11的多个实例可以相同或不同，A2表示氢原子或被-OR3-表示的一价取代基， Z，R3表示单键或二价连接基团，Z表示一价酸基，在存在的多个实例中，至少一个表示由-O-R 3 -Z表示的一价基团，X表示 表示价数m的连接组。
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公开(公告)号：US20160064025A1
公开(公告)日：2016-03-03
申请号：US14838663
申请日：2015-08-28
Applicant: FUJIFILM CORPORATION
Inventor： Takuto KUROKAWA , Kazutoshi KATAYAMA
IPC: G11B5/71
CPC classification number: G11B5/71
Abstract: The magnetic recording medium comprises a nonmagnetic layer comprising nonmagnetic powder and binder on a nonmagnetic support and a magnetic layer comprising ferromagnetic powder and binder on the nonmagnetic layer, wherein the magnetic layer comprises a lubricant and a 1-bromonaphthalene contact angle adjusting agent that is capable of adjusting a contact angle for 1-bromonaphthalene, the contact angle for 1-bromonaphthalene being measured on a surface of the magnetic layer, and the contact angle measured on the surface of the magnetic layer ranges from 45.0° to 55.0° for 1-bromonaphthalene, and ranges from 90.0° to 100.0° for water.
Abstract translation: 磁记录介质包括在非磁性载体上包含非磁性粉末和粘合剂的非磁性层，以及在非磁性层上包含铁磁性粉末和粘合剂的磁性层，其中磁性层包含润滑剂和能够使用的1-溴萘接触角调节剂 调整1-溴萘的接触角时，在磁性层的表面上测定了1-溴萘的接触角，对于1-溴萘，在磁性层的表面测定的接触角为45.0〜55.0° ，水的范围为90.0°〜100.0°。
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3.发明申请MAGNETIC RECORDING MEDIUM AND COATING COMPOSITION FOR MAGNETIC RECORDING MEDIUM 审中-公开用于磁记录介质的磁记录介质和涂层组合物公开(公告)号：US20140374645A1
公开(公告)日：2014-12-25
申请号：US14311894
申请日：2014-06-23
Applicant: FUJIFILM Corporation
Inventor： Wataru KIKUCHI , Toshihide AOSHIMA , Yuushi KANEKO , Kazutoshi KATAYAMA , Katsuhiko MEGURO
CPC classification number: G11B5/7013
Abstract: An aspect of the present invention relates to a magnetic recording medium comprising a magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic support, wherein an average particle size of the ferromagnetic powder is equal to or less than 50 nm, the magnetic layer further comprises a compound, and the compound comprises at least one polyalkyleneimine chain and at least one polyester chain, with a proportion in the compound accounted for by the polyalkyleneimine chain being less than 5.0 weight percent and a number average molecular weight of the polyalkyleneimine chain ranging from 300 to 3,000.
Abstract translation: 本发明的一个方面涉及一种包括在非磁性载体上包含铁磁粉末和粘合剂的磁性层的磁记录介质，其中铁磁性粉末的平均粒度等于或小于50nm，磁性层还包括 化合物，并且化合物包含至少一种聚亚烷基亚胺链和至少一个聚酯链，所述化合物中占聚合亚烷基亚胺链的比例小于5.0重量％，聚亚烷基亚胺链的数均分子量范围为300〜 3,000。
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公开(公告)号：US20230290384A1
公开(公告)日：2023-09-14
申请号：US18166156
申请日：2023-02-08
Applicant: FUJIFILM Corporation
Inventor： Takashi IMAI , Kazutoshi KATAYAMA
IPC: G11B33/14
CPC classification number: G11B33/144
Abstract: A magnetic tape management device includes a processor. The processor acquires a temperature and humidity of an environment in which a magnetic tape is stored, derives a specific enthalpy using the temperature and the humidity, and performs management processing on the magnetic tape in accordance with the specific enthalpy.
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Patent Agency Ranking
5.发明申请MAGNETIC RECORDING MEDIUM AND MAGNETIC COATING COMPOSITION FOR MAGNETIC RECORDING MEDIUM 有权用于磁记录介质的磁记录介质和磁性涂料组合物公开(公告)号：US20150279403A1
公开(公告)日：2015-10-01
申请号：US14673205
申请日：2015-03-30
Applicant: FUJIFILM Corporation
Inventor： Wataru KIKUCHI , Toshihide AOSHIMA , Kazutoshi KATAYAMA , Tatsuo MIKAMI
IPC: G11B5/70 , C09D127/06 , C09D175/04
CPC classification number: C09D127/06 , C08G18/4269 , C08G18/791 , G11B5/7013 , G11B5/714 , C08K5/3492 , C08L27/04
Abstract: An aspect of the present invention relates to a magnetic recording medium, which comprises a magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic support, wherein the magnetic layer further comprises a compound which has a weight average molecular weight of equal to or more than 1,000 but less than 20,000 and is denoted by formula (1): wherein, in formula (1), A denotes a monovalent substituent, R1 denotes a single bond or a divalent connecting group, and m denotes an integer ranging from 2 to 4, multiple instances of A and R1 that are present can be identical or different, at least one of the multiple instances of A that are present denotes a monovalent polymer group and X denotes a heterocyclic group of valence m.
Abstract translation: 本发明的一个方面涉及一种磁记录介质，其包括在非磁性载体上包含铁磁粉末和粘合剂的磁性层，其中所述磁性层还包含重均分子量等于或大于1,000的化合物 但小于20,000，由式（1）表示：其中，在式（1）中，A表示一价取代基，R1表示单键或二价连接基，m表示2〜4的整数，多元 存在的A和R1的实例可以相同或不同，存在的多个实例中的至少一个表示一价聚合物基团，X表示价数m的杂环基团。
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公开(公告)号：US20210056991A1
公开(公告)日：2021-02-25
申请号：US16995907
申请日：2020-08-18
Applicant: FUJIFILM Corporation
Inventor： Takashi IMAI , Kazutoshi KATAYAMA
Abstract: The magnetic tape includes: a non-magnetic support; and a magnetic layer including ferromagnetic powder, in which a change amount of a loss tangent tan δ at a measurement temperature in a range of 50° C. to 100° C. before and after heating at 70° C. for 10 hours is 0.000 or more and 0.012 or less.
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公开(公告)号：US20170349691A1
公开(公告)日：2017-12-07
申请号：US15685202
申请日：2017-08-24
Applicant: FUJIFILM Corporation
Inventor： Toshihide AOSHIMA , Kazutoshi KATAYAMA
CPC classification number: C08G18/3215 , C07C271/40 , C07C271/42 , C07C271/56 , C07C271/58 , C08G18/724 , C08G18/755 , C08G18/757 , C08G18/7621 , C08G18/7642 , C08G18/8016 , C08G18/8019 , C08G18/8025 , C08G18/8029 , G11B5/7021
Abstract: An aspect of the present invention relates to a composition, which is a composition for a magnetic recording medium and comprises an isocyanate compound in the form of an adduct of a polyhydroxyl compound having one or more aromatic carbon rings and three or more hydroxyl groups per molecule with a polyisocyanate having two or more isocyanate groups per molecule.
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8.发明申请MAGNETIC RECORDING MEDIUM AND COATING COMPOSITION FOR MAGNETIC RECORDING MEDIUM 有权用于磁记录介质的磁记录介质和涂层组合物公开(公告)号：US20160093321A1
公开(公告)日：2016-03-31
申请号：US14869014
申请日：2015-09-29
Applicant: FUJIFILM CORPORATION
Inventor： Toshihide AOSHIMA , Wataru KIKUCHI , Kazutoshi KATAYAMA , Tatsuo MIKAMI
CPC classification number: G11B5/7013
Abstract: The magnetic recording medium comprises a magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic support, and further comprises a compound denoted by Formula (1): wherein, in Formula (1), X denotes —O—, —S—, or NR1—; each of R and R1 independently denotes a hydrogen atom or a monovalent substituent; L denotes a divalent connecting group; Z denotes a partial structure of valence n comprising at least one group selected from the group consisting of carboxyl groups and carboxylate groups; m denotes an integer of greater than or equal to 2, and n denotes an integer of greater than or equal to 1.
Abstract translation: 磁性记录介质包括在非磁性载体上包含铁磁粉末和粘合剂的磁性层，并且还包含由式（1）表示的化合物：其中，在式（1）中，X表示-O - ， - S-或NR1 - ; R和R 1各自独立地表示氢原子或一价取代基; L表示二价连接基团; Z表示包含选自羧基和羧酸酯基的至少一个基团的价数n的部分结构; m表示大于或等于2的整数，n表示大于或等于1的整数。
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9.发明申请公开(公告)号：US20150064500A1
公开(公告)日：2015-03-05
申请号：US14472663
申请日：2014-08-29
Applicant: FUJIFILM Corporation
Inventor： Toshihide AOSHIMA , Kazutoshi KATAYAMA
CPC classification number: C08G18/3215 , C07C271/40 , C07C271/42 , C07C271/56 , C07C271/58 , C08G18/724 , C08G18/755 , C08G18/757 , C08G18/7621 , C08G18/7642 , C08G18/8016 , C08G18/8019 , C08G18/8025 , C08G18/8029 , G11B5/7021
Abstract: An aspect of the present invention relates to a composition, which is a composition for a magnetic recording medium and comprises an isocyanate compound in the form of an adduct of a polyhydroxyl compound having one or more aromatic carbon rings and three or more hydroxyl groups per molecule with a polyisocyanate having two or more isocyanate groups per molecule.
Abstract translation: 本发明的一个方面涉及一种组合物，其是用于磁记录介质的组合物，并且包含每分子具有一个或多个芳族碳环和三个或更多个羟基的多羟基化合物的加合物形式的异氰酸酯化合物 与每个分子具有两个或更多个异氰酸酯基团的多异氰酸酯。
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