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1. 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。

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

US4576866A Magnetic recording material 失效
标题翻译：磁记录材料
公开(公告)号：US4576866A
公开(公告)日：1986-03-18
申请号：US592671
申请日：1984-03-23
申请人： Tsutomu Okita , Nobuo Tsuji , Yoshito Mukaida
发明人： Tsutomu Okita , Nobuo Tsuji , Yoshito Mukaida
IPC分类号： C08L75/16 , C09D5/23 , C09D101/18 , C09D127/04 , C09D127/06 , C09D175/04 , G11B5/702 , G11B5/70
CPC分类号： G11B5/7026 , C08L75/16 , G11B5/7022 , Y10S428/90 , Y10T428/265 , Y10T428/31609 , Y10T428/31935
摘要： There is provided a magnetic recording material which comprises a support and a magnetic layer coated thereon. The magnetic layer contains as its binder, a combination of at least one vinyl chloride-vinyl acetate-based copolymer characterized by its --CO.sub.2 H content or cellulose dinitrate, at least one urethane acrylate having a particular chemical structure, and at least one low molecular weight compound having two or more acryloyl or methacryloyl groups. The magnetic layer is hardened by beam irradiation. Thus, marked increase in dispersibility of ferromagnetic powders, improvement in electromagnetic transformation characteristics and sharp increase in durability are attained.
摘要翻译：提供了一种磁记录材料，其包括载体和涂覆在其上的磁性层。磁性层包含作为其粘合剂的至少一种以其-CO 2 H含量或硝酸纤维素为特征的氯乙烯 - 乙酸乙烯酯基共聚物，至少一种具有特定化学结构的氨基甲酸酯丙烯酸酯和至少一种低分子量具有两个以上丙烯酰基或甲基丙烯酰基的化合物。磁性层通过光束照射而硬化。因此，铁磁粉末的分散性显着增加，电磁转变特性的提高和耐久性急剧增加。

4. 发明授权

US4690870A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4690870A
公开(公告)日：1987-09-01
申请号：US654290
申请日：1984-09-25
申请人： Tsutomu Okita , Nobuo Tsuji , Hiroshi Hashimoto , Yoshito Mukaida
发明人： Tsutomu Okita , Nobuo Tsuji , Hiroshi Hashimoto , Yoshito Mukaida
IPC分类号： C09D5/23 , C09D101/18 , C09D127/04 , C09D127/06 , C09D175/04 , C09D175/14 , G11B5/702
CPC分类号： G11B5/7026 , G11B5/7022 , Y10S428/90 , Y10T428/31609 , Y10T428/31935 , Y10T428/31971
摘要： A magnetic recording medium comprising a non-magnetic support having thereon an electron-beam radiation-cured magnetic recording layer, said magnetic layer comprising a ferromagnetic oxide and a binder comprising(1) a resin selected from the group consisting of a vinyl resin containing a carboxylic group in an amount of about 5.times.10.sup.-5 to 2.times.10.sup.-3 equivalent per gram and a nitrocellulose resin;(2) an urethane resin having at least one terminal acrylate group in the main chain or in a side chain of the molecule; and(3) a compound having at least one acryloyl group which is obtained by modifying the isocyanate group of a polyisocyanate having at least two isocyanate groups per molecule.
摘要翻译：一种磁记录介质，包括其上具有电子束辐射固化磁记录层的非磁性载体，所述磁性层包含铁磁性氧化物和粘合剂，所述粘合剂包括（1）选自乙烯基树脂中的树脂，羧基的量为约5×10-5至2×10-3当量/克和硝酸纤维素树脂; （2）在分子的主链或侧链中具有至少一个末端丙烯酸酯基团的聚氨酯树脂; 和（3）具有至少一个丙烯酰基的化合物，其通过每分子具有至少两个异氰酸酯基团的多异氰酸酯的异氰酸酯基进行改性而获得。

5. 发明授权

US4672002A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4672002A
公开(公告)日：1987-06-09
申请号：US598098
申请日：1984-04-09
申请人： Tsutomu Okita , Nobuo Tsuji , Yoshito Mukaida
发明人： Tsutomu Okita , Nobuo Tsuji , Yoshito Mukaida
IPC分类号： C09D5/23 , G11B5/702
CPC分类号： G11B5/7026 , G11B5/7022 , Y10S428/90 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium comprising a support having coated thereon a magnetic layer is disclosed. The magnetic layer contains, as a binder, a composition cured with electron beam comprising (a) at least one of vinyl chloride-vinyl acetate type resins containing 5.times.10.sup.-5 to 1.7.times.10.sup.-3 equivalents of a carboxyl group per gram of the polymer and introcellulose resins, (b) a urethane resin and (c) at least one compound selected from the group consisting of aromatic or alicyclic compounds containing at least two vinyl linkages in the molecule and acryloyl-modified polyisocyanate compounds. The magnetic recording medium has excellent electromagnetic properties and durability.
摘要翻译：公开了一种包括其上涂覆有磁性层的载体的磁记录介质。磁性层含有电子束固化的组合物，该组合物包含（a）每克聚合物含有5×10-5至1.7×10-3当量的羧基的氯乙烯 - 乙酸乙烯酯型树脂中的至少一种，和内层纤维素树脂，（b）聚氨酯树脂和（c）至少一种选自分子中含有至少两个乙烯基键的芳族或脂环族化合物的化合物和丙烯酰基改性的多异氰酸酯化合物。磁记录介质具有优异的电磁特性和耐久性。

6. 发明授权

US4405481A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4405481A
公开(公告)日：1983-09-20
申请号：US220215
申请日：1980-12-24
申请人： Yasuyuki Yamada , Nobuo Tsuji , Tsutomu Okita , Yasuo Mukunoki
发明人： Yasuyuki Yamada , Nobuo Tsuji , Tsutomu Okita , Yasuo Mukunoki
IPC分类号： C09D5/23 , C09D7/12 , G11B5/708 , G11B5/71 , B05D5/12
CPC分类号： G11B5/7085 , G11B5/71 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/257
摘要： A magnetic recording medium containing a ferromagnetic powder, a binder and a lubricant is disclosed. The lubricant comprises (1) abrasive particles having a Mohs' hardness of about 6 or more and a particle size of about 5 microns or less and (2) an ester of an aliphatic acid having 20 to 26 carbon atoms and a monovalent alcohol having 1 to 26 carbon atoms.
摘要翻译：公开了含有铁磁粉末，粘合剂和润滑剂的磁记录介质。润滑剂包括（1）莫氏硬度为约6或更大并且粒度为约5微米或更小的磨料颗粒和（2）具有20至26个碳原子的脂族酸的酯和具有1个至26个碳原子。

7. 发明授权

US4837081A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4837081A
公开(公告)日：1989-06-06
申请号：US39123
申请日：1987-04-16
申请人： Yasuyuki Yamada , Hajime Miyatsuka , Tsutomu Okita , Nobuo Tsuji
发明人： Yasuyuki Yamada , Hajime Miyatsuka , Tsutomu Okita , Nobuo Tsuji
IPC分类号： C08G18/44 , C08L75/04 , C09D5/23 , C09D175/00 , C09D175/04 , C09D175/08 , G11B5/702 , G11B5/706 , G11B5/708
CPC分类号： G11B5/70636 , C08G18/44 , C08L75/04 , G11B5/7022 , Y10S428/90 , Y10T428/257 , Y10T428/31507 , Y10T428/31609
摘要： A magnetic recording medium is described, comprising a non-magnetic support having provided thereon a magnetic layer containing CrO.sub.2 fine particles and a binder, wherein the binder comprises polycarbonate polyurethane in an amount of from about 30 to about 90 wt %, based on the total weight of said binder.
摘要翻译：描述了一种磁记录介质，其包括在其上设置有含有CrO 2微粒和粘合剂的磁性层的非磁性载体，其中所述粘合剂包含约30至约90重量％的聚碳酸酯聚氨酯，基于总计所述粘合剂的重量。

8. 发明授权

US4699844A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4699844A
公开(公告)日：1987-10-13
申请号：US598097
申请日：1984-04-09
申请人： Tsutomu Okita , Nobuo Tsuji , Yoshito Mukaida
发明人： Tsutomu Okita , Nobuo Tsuji , Yoshito Mukaida
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/14 , G11B5/702 , G11B5/78
CPC分类号： G11B5/7026 , G11B5/7022 , Y10S428/90 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium comprised of a support base having a magnetic recording provided thereon is disclosed. The recording layer is comprised of ferromagnetic particles dispersed in a binder. The binder includes (1) a vinyl chloride-vinyl alkanoate type copolymer containing --CO.sub.2 H group of 5.times.10.sup.-5 to 1.7.times.10.sup.-3 equivalent per g of the polymer, (2) urethane acrylate having a molecular weight in the range of from 20,000 to 300,000, and (3) a compound having at least two (meth)acryloyl groups in the molecule and having a molecular weight of 600 or less. The magnetic recording layer is irradiated with electron beams in order to harden the binder. The resulting medium has excellent electromagnetic properties and the magnetic coating composition prepared for making the magnetic recording layer has excellent stability during storage.
摘要翻译：公开了一种磁记录介质，包括其上提供有磁记录的支撑基座。记录层由分散在粘合剂中的铁磁颗粒组成。粘合剂包括（1）含有每10克聚合物5×10-5至1.7×10-3当量的-CO 2 H基的氯乙烯 - 乙烯基链烷酸酯型共聚物，（2）分子量范围为20,000至 300,000，和（3）在分子中具有至少两个（甲基）丙烯酰基并且分子量为600以下的化合物。用电子束照射磁记录层，以使粘合剂硬化。所得到的介质具有优异的电磁特性，并且制备用于制备磁记录层的磁性涂料组合物在储存期间具有优异的稳定性。

9. 发明授权

US4857402A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4857402A
公开(公告)日：1989-08-15
申请号：US33704
申请日：1987-04-03
申请人： Yasuo Nishikawa , Hajime Miyazuka , Nobuo Tsuji
发明人： Yasuo Nishikawa , Hajime Miyazuka , Nobuo Tsuji
IPC分类号： G11B5/708 , C09D5/23 , G11B5/71
CPC分类号： G11B5/71 , Y10S428/90 , Y10T428/265
摘要： A magnetic recording medium comprising a non-magnetic support having provided thereon a magnetic layer containing ferromagnetic particles and a binder, wherein the magnetic layer contains at least one lubricating agent selected from the group consisting of a salt of a sulfonic acid and a salt of sulfuric acid ester.
摘要翻译：一种磁记录介质，包括在其上设置有包含铁磁颗粒和粘合剂的磁性层的非磁性载体，其中所述磁性层含有至少一种选自磺酸盐和硫酸盐的润滑剂酸酯。

10. 发明授权

US4448842A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4448842A
公开(公告)日：1984-05-15
申请号：US345848
申请日：1982-02-04
申请人： Nobutaka Yamaguchi , Nobuo Tsuji , Masaaki Fujiyama
发明人： Nobutaka Yamaguchi , Nobuo Tsuji , Masaaki Fujiyama
IPC分类号： C09D5/23 , C09D7/12 , G11B5/708 , G11B5/70
CPC分类号： G11B5/7085 , Y10S428/90 , Y10T428/25 , Y10T428/257 , Y10T428/266
摘要： A magnetic recording medium having a magnetic layer formed on a non-magnetic base is disclosed. The magnetic layer comprises (1) magnetic particles, (2) an abrasive having a Mohs hardness of 6 or more, (3) calcium carbonate, (4) an aliphatic acid and (5) an aliphatic acid ester.
摘要翻译：公开了一种在非磁性基底上形成有磁性层的磁记录介质。磁性层包括（1）磁性颗粒，（2）莫氏硬度为6以上的磨料，（3）碳酸钙，（4）脂肪酸和（5）脂肪酸酯。

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