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1. 发明授权

US4632878A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4632878A
公开(公告)日：1986-12-30
申请号：US768007
申请日：1985-08-21
申请人： Tsutomu Okita , Hiroshi Hashimoto , Akiyoshi Hashimoto , Teruo Nakagawa , Hiroyuki Kato
发明人： Tsutomu Okita , Hiroshi Hashimoto , Akiyoshi Hashimoto , Teruo Nakagawa , Hiroyuki Kato
IPC分类号： C08G18/67 , C09D5/23 , C09D175/04 , C09D175/06 , G11B5/702 , G11B5/70
CPC分类号： G11B5/7021 , C08G18/671 , C08G18/673 , C08G18/678 , Y10S428/90 , Y10T428/31609 , Y10T428/31935
摘要： The present invention relates to a magnetic recording medium prepared by the process comprising (1) coating a magnetic coating composition mainly containing ferromagnetic particles and a binder on a support and (2) irradiating the resulting support with electron beams, wherein the binder contains a compound represented by the following formula, ##STR1## wherein A represents a radical of a hydroxy compound containing at least one isocyanurate ring and at least one (meth)acryloyl group; DI represents a radical of an organic diisocyanate compound; B represents a radical of a polyol having at least two hydroxy groups; C represents a radical of a polybasic acid having at least two carboxy groups; m is a number of 1 to 7; and N is a positive number of 7 or less.
摘要翻译：本发明涉及一种通过以下方法制备的磁记录介质：（1）在载体上涂覆主要包含铁磁颗粒和粘合剂的磁性涂料组合物，和（2）用电子束照射所得载体，其中粘合剂含有化合物由下式表示：A-DI - [（BC）m-B-DI] N-A其中A表示含有至少一个异氰脲酸酯环和至少一个（甲基）丙烯酰基的羟基化合物的基团 ; DI表示有机二异氰酸酯化合物的基团; B表示具有至少两个羟基的多元醇基团; C表示具有至少两个羧基的多元酸的基团; m是1到7的数; N为7以下的正数。

2. 发明授权

US4621027A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4621027A
公开(公告)日：1986-11-04
申请号：US666081
申请日：1984-10-29
申请人： Tsutomu Okita , Nobuo Tsuji , Yoshito Mukaida , Hiroshi Hashimoto , Teruo Nakagawa , Akiyoshi Hashimoto , Takahisa Ogasawara, deceased
发明人： Tsutomu Okita , Nobuo Tsuji , Yoshito Mukaida , Hiroshi Hashimoto , Teruo Nakagawa , Akiyoshi Hashimoto , Takahisa Ogasawara, deceased
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/70
CPC分类号： G11B5/7023 , G11B5/7021 , G11B5/7022 , G11B5/7026 , Y10S428/90 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium is described, comprising a support and a magnetic layer disposed thereon, said magnetic layer containing as its binder component a combination of at least one member of each of the following groups of compounds (1) to (3) that has been exposed to electron beams:(1) vinyl chloride type resin, vinyl acetate type resin, vinyl chloride-vinyl acetate type resin, each containing from 5.times.10.sup.-5 to 2.times.10.sup.-3 equivalents of --CO.sub.2 H groups per gram of copolymer, and nitrocellulose resin;(2) urethane resins and urethane-acrylate oligomers; and(3) compounds containing an isocyanurate ring and at least two groups selected from acryloyl and methacryloyl groups.
摘要翻译：描述了一种磁记录介质，其包括支撑体和设置在其上的磁性层，所述磁性层包含作为其粘合剂组分的化合物（1）至（3）的以下各组中的至少一个的组合，暴露于电子束：（1）氯乙烯类树脂，乙酸乙烯酯型树脂，氯乙烯 - 乙酸乙烯酯型树脂，每克共聚物含有5×10-5至2×10-3当量的-CO 2 H基，硝基纤维素树脂; （2）聚氨酯树脂和氨基甲酸酯丙烯酸酯低聚物; 和（3）含有异氰脲酸酯环和至少两个选自丙烯酰基和甲基丙烯酰基的基团的化合物。

3. 发明授权

US4657817A Magnetic recording material 失效
标题翻译：磁记录材料
公开(公告)号：US4657817A
公开(公告)日：1987-04-14
申请号：US558673
申请日：1983-12-06
申请人： Tsutomu Okita , Kyoichi Naruo , Nobuo Tsuji , Teruo Nakagawa , Kiyoshi Murase , Takahisa Ogasawara
发明人： Tsutomu Okita , Kyoichi Naruo , Nobuo Tsuji , Teruo Nakagawa , Kiyoshi Murase , Takahisa Ogasawara
IPC分类号： C08F290/00 , C08F299/06 , C08G18/42 , C08G18/67 , C08L75/16 , C09D5/23 , C09D175/04 , C09D175/14 , G11B5/702 , G11B5/70
CPC分类号： G11B5/7026 , C08G18/42 , C08G18/672 , C08L75/16 , G11B5/7021 , Y10S428/90 , Y10T428/31609
摘要： There is provided a magnetic recording material produced by coating on a support a magnetic coating composition which contains as main components a magnetic powder and a binder, the binder comprising an urethane acrylate synthesized using a polyester polyol having a particular structure, and by irradiating the resulting magnetic coat with electron beams to harden it. The polyester polyol contains polyhydric alcohol component, 50 mole % or more of which is a dihydric alcohol selected from the class (A) described below, and/or polybasic acid component, 50 mole % or more of which is a dibasic acid selected from the class (B) described below. The urethane acrylate is synthesized under such a condition that it may have two or more of (meth)acryloyl groups per molecule. Thus, improvements in electromagnetic properties and in durability are attained.Class (A): Alkyl-substituted aliphatic dihydric alcohols, alicyclic dihydric alcohols, and dihydric alcohols made by addition of alkylene oxides to alicyclic or aromatic dihydric alcohols.Class (B): Alicyclic dicarboxylic acids and aromatic dicarboxylic acids.
摘要翻译：提供了一种通过在载体上涂覆磁性涂料组合物而制备的磁记录材料，磁性涂料组合物含有作为主要组分的磁性粉末和粘合剂，所述粘合剂包含使用具有特定结构的聚酯多元醇合成的聚氨酯丙烯酸酯，并且通过照射所得到的磁性涂层用电子束硬化。聚酯多元醇含有多元醇成分，其中50摩尔％以上是选自下述（A）的二元醇，和/或多元酸成分，50摩尔％以上的二元酸选自（B）类。氨基甲酸酯丙烯酸酯在每分子可以具有两个以上（甲基）丙烯酰基的条件下合成。因此，获得了电磁特性和耐久性的改善。（A）类：烷基取代的脂族二元醇，脂环族二元醇和通过将环氧烷烃加成到脂环族或芳族二元醇中制得的二元醇。类（B）：脂环族二羧酸和芳族二羧酸。

4. 发明授权

US5908691A Magnetic recording medium having a lower layer containing a specified polyurethane binder 失效
标题翻译：具有含有特定聚氨酯粘合剂的下层的磁记录介质
公开(公告)号：US5908691A
公开(公告)日：1999-06-01
申请号：US772575
申请日：1996-12-26
申请人： Yuichiro Murayama , Masaki Satake , Hiroshi Hashimoto , Tsutomu Okita
发明人： Yuichiro Murayama , Masaki Satake , Hiroshi Hashimoto , Tsutomu Okita
IPC分类号： C09D5/23 , C09D175/04 , G11B5/702 , G11B5/738
CPC分类号： G11B5/738 , G11B5/7021 , Y10S428/90 , Y10T428/265 , Y10T428/31609
摘要： The present invention provides a magnetic recording medium having high durability and excellent electromagnetic transfer characteristics and having a lower coating layer, which contains a binder and has high dispersion property and durability. The magnetic recording medium comprises a lower coating layer where non-magnetic powder or ferromagnetic power is dispersed in a binder and an upper magnetic layer where ferromagnetic powder is dispersed in a binder, said two layers being placed on a non-magnetic support member, whereby the binder of the lower coating layer comprises polyurethane resin, which is a reaction product using diol and organic diisocyanate as major materials, the polyurethane resin contains short-chain diol having cyclic structure by 17 to 40 weight %, and the polyurethane resin contains long-chain diol, containing ether groups by 1.0 to 5.0 mmol/g to the entire polyurethane resin, by 10 to 50 weight %.
摘要翻译：本发明提供一种具有高耐久性和优异的电磁传递特性的磁记录介质，并具有包含粘合剂并具有高分散性和耐久性的下涂层。磁记录介质包括其中非磁性粉末或铁磁力分散在粘合剂中的下涂层和将铁磁性粉末分散在粘合剂中的上磁性层，所述两层位于非磁性支撑构件上，由此下涂层的粘合剂包含聚氨酯树脂，其是使用二醇和有机二异氰酸酯作为主要材料的反应产物，所述聚氨酯树脂包含具有17至40重量％的环状结构的短链二醇，并且所述聚氨酯树脂包含长链，链状二醇，含有醚基团，1.0〜5.0mmol / g，相对于整个聚氨酯树脂，为10〜50重量％。

5. 发明授权

US4959263A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4959263A
公开(公告)日：1990-09-25
申请号：US195224
申请日：1988-05-18
申请人： Masashi Aonuma , Tsutomu Okita , Hiroshi Hashimoto , Hiroaki Araki , Kiyotaka Fukino , Kiyomi Ejiri
发明人： Masashi Aonuma , Tsutomu Okita , Hiroshi Hashimoto , Hiroaki Araki , Kiyotaka Fukino , Kiyomi Ejiri
IPC分类号： G11B5/702 , G11B5/712 , G11B5/714
CPC分类号： G11B5/7026 , G11B5/712 , G11B5/714 , Y10S428/90 , Y10T428/257
摘要： A magnetic recording medium is described, comprising a nonmagnetic support having thereon a magnetic layer containing a binder which is cross-linkable or polymerizable by radiation irradiation and ferromagnetic particles, the ferromagnetic particles being metal or metal alloy particles mainly comprising iron having a crystal size of 300 .ANG. or less, having an atomic ratio of oxygen atoms to iron atoms of from 1.6 to 3.0 on the surface of the particles, and the magnetic layer having been irradiated with radiation, and comprising a nonmagnetic support having thereon a magnetic layer containing a binder comprising thermoplastic resins, thermosetting resins, reactive type resins and mixtures thereof and ferromagnetic particles, said ferromagnetic particles being metal or metal alloy particles mainly comprising iron having a crystal size of 250 .ANG. or less, and having an atomic ratio of oxygen atoms to iron atoms of from 1.6 to 3.0 on the surface of said particles.
摘要翻译：描述了一种磁记录介质，其包括其上具有含有可通过辐射照射和铁磁性颗粒可交联或可聚合的粘合剂的磁性层的非磁性载体，所述铁磁颗粒是主要包含具有晶体尺寸的铁的金属或金属合金颗粒 300或更小，在颗粒表面上的氧原子与铁原子的原子比为1.6至3.0，并且已经辐照辐照的磁性层，并且包含其上具有含有粘合剂的磁性层的非磁性载体包括热塑性树脂，热固性树脂，反应型树脂及其混合物和铁磁颗粒，所述铁磁性颗粒是主要包含结晶尺寸为250或更小的铁并且具有氧原子与铁原子的原子比的金属或金属合金颗粒在所述颗粒的表面上为1.6至3.0。

6. 发明授权

US4664965A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4664965A
公开(公告)日：1987-05-12
申请号：US684319
申请日：1984-12-20
申请人： Tsutomu Okita , Hiroshi Hashimoto , Yoshito Mukaida
发明人： Tsutomu Okita , Hiroshi Hashimoto , Yoshito Mukaida
IPC分类号： G11B5/73 , G11B5/704
CPC分类号： G11B5/7305 , Y10S428/90 , Y10T428/24372 , Y10T428/24413 , Y10T428/24942 , Y10T428/265 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium is disclosed, which comprises a non-magnetic support having a surface roughness of not less than 0.01 .mu.m having thereon an intermediate layer and a magnetic layer, the intermediate layer comprising a polyester polyol having at least two acryloyl and/or methacryloyl groups in the molecule thereof, which has been polymerization-hardened by exposure to radiation. The magnetic recording medium has markedly improved video sensitivity, C/N ratio and adhesiveness between the support and the magnetic layer.
摘要翻译：公开了一种磁记录介质，其包括表面粗糙度不小于0.01μm的非磁性载体，其上具有中间层和磁性层，所述中间层包含具有至少两个丙烯酰基和/或其分子中的甲基丙烯酰基已经通过暴露于辐射聚合硬化。磁记录介质显着提高了视频灵敏度，C / N比和支持层与磁性层之间的粘合性。

7. 发明授权

US5258231A Magnetic recording medium having ferromagnetic powder, a binder containing a specified vinyl chloride copolymer, polar group containing polyurethane resin and a fatty acid amide 失效
标题翻译：具有铁磁粉末的磁记录介质，含有特定氯乙烯共聚物的粘合剂，含极性基团的聚氨酯树脂和脂肪酸酰胺
公开(公告)号：US5258231A
公开(公告)日：1993-11-02
申请号：US908916
申请日：1992-07-02
申请人： Tsutomu Okita , Yasuo Nishikawa , Hiroshi Hashimoto , Hideomi Watanabe
发明人： Tsutomu Okita , Yasuo Nishikawa , Hiroshi Hashimoto , Hideomi Watanabe
IPC分类号： G11B5/702 , G11B5/00
CPC分类号： G11B5/7022 , Y10S428/90 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium comprising a non-magnetic support having provided thereon a magnetic layer comprising a ferromagnetic powder and a binder material, wherein the magnetic layer contains at least a vinyl chloride copolymer binder having at least one polar group selected from --SO.sub.3 M and --COOM, wherein M represents a hydrogen atom, an alkali metal, or an ammonium ion, and at least one epoxy group per molecule in an amount of 1.times.10.sup.-4 to 1.times.10.sup.-2 per gram, and a fatty acid amide having from 12 to 26 atoms and present in an amount of from 0.05 to 2 wt % based on the amount of the ferromagnetic powder, and wherein the content of the polar group in the vinyl chloride copolymer binder is from about 1.times.10.sup.-7 to 1.times.10.sup.-3 equivalent per gram, and wherein the vinyl chloride copolymer binder has a weight average molecular weight of from 20,000 to 100,000 and wherein the magnetic layer further contains a polyurethane resin having a polar group.
摘要翻译：一种磁记录介质，包括非磁性载体，其上设置有包含铁磁性粉末和粘合剂材料的磁性层，其中所述磁性层至少含有具有至少一个选自-SO 3 M和-COOM的极性基团的氯乙烯共聚物粘合剂，其中M表示氢原子，碱金属或铵离子，每分子中至少一个环氧基团的量为1×10 -4至1×10 -2 /克，具有12至26个原子的脂肪酸酰胺并且以铁磁粉末的量计为0.05-2重量％，其中氯乙烯共聚物粘合剂中极性基团的含量为每克约1×10-7至1×10-3当量，其中所述氯乙烯共聚物粘合剂的重均分子量为20,000至100,000，并且其中所述磁性层还含有具有极性基团的聚氨酯树脂。

8. 发明授权

US5141808A Magnetic recording medium having two magnetic layers each containing a specified polyurethane resin 失效
标题翻译：具有两个磁性层的磁记录介质各自含有特定的聚氨酯树脂
公开(公告)号：US5141808A
公开(公告)日：1992-08-25
申请号：US309576
申请日：1989-02-13
申请人： Hiroshi Hashimoto , Kazuo Hasumi , Tsutomu Okita
发明人： Hiroshi Hashimoto , Kazuo Hasumi , Tsutomu Okita
IPC分类号： C09D5/23 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/716
CPC分类号： G11B5/716 , G11B5/7021 , Y10S428/90 , Y10T428/265 , Y10T428/31554 , Y10T428/3158 , Y10T428/31609
摘要： A magnetic recording medium comprising a nonmagnetic support having thereon a lower magnetic layer and a upper magnetic layer, in this order, wherein the lower magnetic layer contains as a binder a polyurethane reisn having a number average molecular weight of less than 25,000, and the upper magnetic layer contains as a binder (a) a polyurethane resin having (i) at least three organic groups having an active hydrogen per polyurethane molecule and (ii) a number average molecular weight of 25,000 or more, and (b) a polyisocyanate.
摘要翻译：一种磁记录介质，其具有依次具有下磁性层和上磁性层的非磁性载体，其中下磁性层含有作为粘合剂的数均分子量小于25,000的聚氨酯弹性体，磁性层包含作为粘合剂的（a）聚氨酯树脂，其具有（i）至少三个每个聚氨酯分子具有活性氢的有机基团和（ii）数均分子量为25,000以上，和（b）多异氰酸酯。

9. 发明授权

US5084341A Magnetic recording medium comprising a polyurethane resin having a thio, thiocarboxy or dithiocarboxy group; a vinyl chloride resin containing a polar group and a hyroxy group; and a polyisocyanate compound 失效
标题翻译：含有THIO，三羟甲基或二烷氧基的聚氨酯树脂的磁记录介质; 含有极性基团和羟基的VINYL氯化物树脂; 和聚异氰酸酯化合物
公开(公告)号：US5084341A
公开(公告)日：1992-01-28
申请号：US421025
申请日：1989-10-13
申请人： Hiroshi Hashimoto , Tsutomu Okita , Kiyomi Ejiri
发明人： Hiroshi Hashimoto , Tsutomu Okita , Kiyomi Ejiri
IPC分类号： C09D5/23 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/706
CPC分类号： G11B5/7022 , Y10S428/90 , Y10T428/256 , Y10T428/31609
摘要： A magnetic recording medium comprising a non-magnetic support having provided thereon a magnetic layer comprising ferromagnetic metal particles dispersed in a binder, wherein said ferromagnetic metal particles have a crystalline size of 250 .ANG. or less, and said binder comprises(i) a polyurethane resin having an S-containing group which is at least one member selected from the group consisting of --SH, ##STR1## said polyurethane resin being one which has been synthesized by the use of a polyhydric alcohol, as a crosslinking agent, having at least three hydroxyl groups and has a branched and crosslinked structure,(ii) a vinyl chloride resin containing an --OH group and a polar group which is at least one member selected from the group consisting of --SO.sub.3 M, --SO.sub.4 M, --OPO(OM).sub.2, --PO(OM).sub.2, --COOM, --NR.sub.2 and --NR.sub.3.sup..sym. (wherein M represents a hydrogen atom or an alkali metal, and R represents an alkyl group having up to 4 carbon atoms), and(iii) a polyisocyanate compound.
摘要翻译：一种磁记录介质，包括非磁性载体，其上设置有包含分散在粘合剂中的铁磁金属颗粒的磁性层，其中所述强磁性金属颗粒的结晶尺寸为250纳米或更小，并且所述粘合剂包括（i）聚氨酯树脂具有含S基团，其是选自-SH，所述聚氨酯树脂中的至少一种，所述聚氨酯树脂是通过使用多元醇合成的聚氨酯树脂作为交联剂，其具有至少三个羟基，并且具有支链和交联结构，（ii）含有-OH基团和极性基团的氯乙烯树脂，其是选自-SO 3 M，-SO 4 M，-OPO（OM）2中的至少一种，-PO（OM）2，-COOM，-NR2和-NR3（+）（其中M表示氢原子或碱金属，R表示具有至多4个碳原子的烷基），和（iii）多异氰酸酯化合物。

10. 发明授权

US5082733A Magnetic recording medium containing magnetic particles surface treated with a glycidyl compound 失效
标题翻译：含有用缩水甘油基化合物表面处理的磁性颗粒的磁记录介质
公开(公告)号：US5082733A
公开(公告)日：1992-01-21
申请号：US340617
申请日：1989-04-18
申请人： Hideomi Watanabe , Mikio Ohno , Hiroshi Hashimoto , Tsutomu Okita
发明人： Hideomi Watanabe , Mikio Ohno , Hiroshi Hashimoto , Tsutomu Okita
IPC分类号： G11B5/842 , G11B5/712
CPC分类号： G11B5/712 , Y10S428/90 , Y10T428/2991 , Y10T428/2998
摘要： A method for preparing a magnetic recording medium is disclosed, comprising the steps of (1) surface-treating ferromagnetic particles with a glycidyl compound having a molecular weight of 1,000 or less and having an epoxy equivalent of 200 g/eq. or less, (2) dispersing the surface-treated ferromagnetic particles with a binder to prepare a magnetic coating composition, (3) coating the resulting magnetic coating composition on a nonmagnetic support, and then (4) drying the magnetic coating composition.
摘要翻译：公开了一种制备磁记录介质的方法，包括以下步骤：（1）用分子量为1,000或更小的环氧当量为200g / eq的缩水甘油基化合物对铁磁颗粒进行表面处理。（2）用粘合剂分散表面处理的铁磁颗粒以制备磁性涂料组合物，（3）将所得磁性涂料组合物涂布在非磁性载体上，然后（4）干燥磁性涂料组合物。

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