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1. 发明授权

US4716077A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4716077A
公开(公告)日：1987-12-29
申请号：US884450
申请日：1986-07-11
申请人： Tsutomu Okita , Hiroshi Hashimoto , Masashi Aonuma
发明人： Tsutomu Okita , Hiroshi Hashimoto , Masashi Aonuma
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/14 , G11B5/702 , G11B5/73
CPC分类号： G11B5/7022 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium is described, comprising a non-magnetic support and a magnetic layer, said magnetic layer containing as a binder at least one compound selected from each of compound groups (A) and (B) that has been exposed to radiation, wherein(A) is polyvinyl chloride type compounds containing at least one polar group and at least one carbon-carbon unsaturated bond per molecule; and(B) is polyurethane type compounds containing at least one --CO.sub.2 H group and at lease one carbon-carbon unsaturated bond per molecule.
摘要翻译：描述了一种磁记录介质，其包括非磁性载体和磁性层，所述磁性层含有至少一种选自化合物组（A）和（B）中的每一种已被暴露于辐射的化合物作为粘合剂，其中（A）是每分子含有至少一个极性基团和至少一个碳 - 碳不饱和键的聚氯乙烯型化合物; 和（B）是每分子含有至少一个-CO 2 H基团和至少一个碳 - 碳不饱和键的聚氨酯型化合物。

2. 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。

3. 发明授权

US4976989A Method for preparing a magnetic recording medium 失效
标题翻译：磁记录介质的制备方法
公开(公告)号：US4976989A
公开(公告)日：1990-12-11
申请号：US532158
申请日：1990-06-04
申请人： Masashi Aonuma , Tsutomu Okita , Hiroshi Hashimoto , Kingo Kobayashi
发明人： Masashi Aonuma , Tsutomu Okita , Hiroshi Hashimoto , Kingo Kobayashi
IPC分类号： G11B5/702 , G11B5/842
CPC分类号： G11B5/842 , G11B5/7026
摘要： A method for preparing a magnetic recording medium comprises the steps of coating, on a non-magnetic support, a magnetic layer mainly containing ferromagnetic particles and a binder polymerizable by radiation exposure, conducting a calendering treatment, and thereafter conducting a radiation exposure treatment without winding up the magnetic layer.
摘要翻译：一种制备磁记录介质的方法包括以下步骤：在非磁性载体上涂覆主要包含铁磁颗粒的磁性层和通过辐射曝光可聚合的粘合剂，进行压延处理，然后进行辐射曝光处理而不缠绕磁层。

4. 发明授权

US4812351A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4812351A
公开(公告)日：1989-03-14
申请号：US191804
申请日：1988-05-03
申请人： Tsutomu Okita , Masashi Aonuma , Hiroshi Hashimoto
发明人： Tsutomu Okita , Masashi Aonuma , Hiroshi Hashimoto
IPC分类号： G11B5/735 , G11B5/70
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/24355 , Y10T428/265
摘要： A magnetic recording medium is described, comprising a non-magnetic support having a surface roughness of 0.02 .mu.m or less, a magnetic layer on the surface of the support and a backing layer on a surface of the support opposite to the surface on which the magnetic layer is formed, wherein the backing layer is formed by exposing to radiation a layer comprising (A) non-magnetic particles and (B) a radiation polymerizable compound.
摘要翻译：描述了一种磁记录介质，其包括具有0.02μm或更小的表面粗糙度的非磁性支撑体，支撑体表面上的磁性层和与表面相反的表面的表面上的背衬层，形成磁性层，其中通过将包含（A）非磁性颗粒和（B）可辐射聚合化合物的层暴露于辐射而形成背衬层。

5. 发明授权

US4671998A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4671998A
公开(公告)日：1987-06-09
申请号：US831686
申请日：1986-02-21
申请人： Tsutomu Okita , Masashi Aonuma , Hiroshi Hashimoto
发明人： Tsutomu Okita , Masashi Aonuma , Hiroshi Hashimoto
IPC分类号： C09D4/00 , C09D5/23 , C09D175/14 , C09D175/16 , G11B5/702
CPC分类号： G11B5/7026 , G11B5/7022 , G11B5/7023 , Y10S428/90 , Y10T428/31504 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium having an improved durability is disclosed, which comprises a support having provided thereon a magnetic layer containing ferromagnetic particles and a binder, that is exposed to radiation, wherein the binder comprises a compound having one or more triazine rings and at least two vinyl groups per molecule.
摘要翻译：公开了具有改进的耐久性的磁记录介质，其包括在其上设置有暴露于辐射的含有铁磁颗粒和粘合剂的磁性层的载体，其中粘合剂包含具有一个或多个三嗪环和至少两个乙烯基。

6. 发明授权

US5126215A Magnetic recording medium having a surface with pores of specified average inlet diameter and wide pore size distribution controlled by calender treatment 失效
标题翻译：磁记录介质具有通过压延处理控制的具有规定的平均入口直径和宽孔径分布的孔的表面
公开(公告)号：US5126215A
公开(公告)日：1992-06-30
申请号：US337686
申请日：1989-04-13
申请人： Masashi Aonuma , Hiroaki Araki , Hiroshi Hashimoto , Tsutomu Okita , Yasuo Nishikawa
发明人： Masashi Aonuma , Hiroaki Araki , Hiroshi Hashimoto , Tsutomu Okita , Yasuo Nishikawa
IPC分类号： G11B5/712
CPC分类号： G11B5/712 , Y10S428/90
摘要： A magnetic recording medium comprising a nonmagnetic support having formed thereon a magnetic layer containing ferromagnetic particles dispersed in a binder, wherein the surface of the magnetic layer has pores of (a) at most 50 .ANG. in the average value of pore inlet diameters measured by a nitrogen gas adsorption method and (b) at least 25 .ANG. in the half value width of the frequency distribution curve of the pore inlet diameters.
摘要翻译：一种磁记录介质，包括在其上形成有分散在粘合剂中的铁磁颗粒的磁性层的非磁性载体，其中所述磁性层的表面具有孔（a）至多为50的孔，孔的平均值由氮气吸附法和（b）孔入口直径频率分布曲线半值宽度中至少25 ANGSTROM。

7. 发明授权

US6149989A Magnetic recording particulate medium 失效
标题翻译：磁记录微粒介质
公开(公告)号：US6149989A
公开(公告)日：2000-11-21
申请号：US84866
申请日：1998-05-28
申请人： Hiroaki Araki , Tsuneo Yoshida , Toshichika Aoki , Masashi Aonuma , Kazuo Kato , Kazutoshi Katayama , Hiroshi Hashimoto
发明人： Hiroaki Araki , Tsuneo Yoshida , Toshichika Aoki , Masashi Aonuma , Kazuo Kato , Kazutoshi Katayama , Hiroshi Hashimoto
IPC分类号： G11B5/706 , G11B5/66
CPC分类号： G11B5/7085 , G11B5/70621 , Y10S428/90
摘要： The present invention discloses a magnetic recording particulate mediumhaving amagnetic layer on anonmagnetic support, the magnetic layer containing a ferromagnetic metal powder and a binder and having a coercive force of 1,400 to 1,700 Oe, wherein the ferromagnetic metal powder is spindle-shaped particles consisting essentially of Fe and having a Co/Fe ratio of from 1 to 5 atomic %, an Al/Fe ratio of from 5 to 15 atomic %, an average major axis length of 0.1 to 0.2 .mu.m and a specific surface area of 40 to 50 m.sup.2 /g, and the binder contains a polyurethane consisting essentially of a diol component comprising a polyether polyol and a polyester polyol and a polyisocyanate component. This magnetic recording particulate medium is characterized by minimal head wear, freedom from head clogging, and satisfactory electromagnetic characteristics.
摘要翻译：本发明公开了一种磁性载体上的磁记录微粒介质，其磁性层含有强磁性金属粉末和粘合剂，矫顽力为1,400至1700He，其中铁磁性金属粉末为纺锤形颗粒，主要由 Fe，Co / Fe比为1〜5原子％，Al / Fe比为5〜15原子％，平均长轴长度为0.1〜0.2μm，比表面积为40〜50μm / g，并且粘合剂含有主要由包含聚醚多元醇和聚酯多元醇和多异氰酸酯组分的二醇组分组成的聚氨酯。这种磁记录颗粒介质的特征在于最小的头部磨损，不受头部堵塞和令人满意的电磁特性。

8. 发明授权

US5795645A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5795645A
公开(公告)日：1998-08-18
申请号：US617555
申请日：1996-03-19
申请人： Masatoshi Takahashi , Nobuyoshi Asada , Hiroshi Hashimoto , Masashi Aonuma
发明人： Masatoshi Takahashi , Nobuyoshi Asada , Hiroshi Hashimoto , Masashi Aonuma
IPC分类号： C09D5/23 , C09D171/00 , C09D171/12 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/706
CPC分类号： G11B5/70621 , G11B5/7022 , Y10S428/90 , Y10T428/24975 , Y10T428/25 , Y10T428/256 , Y10T428/31609
摘要： A magnetic recording medium is disclosed, comprising a magnetic layer comprising a ferromagnetic powder and a binder provided on one side of a non-magnetic support and a backing layer provided on another side of said non-magnetic support, wherein said ferromagnetic powder is a ferromagnetic metal powder comprising Fe as a main component Co and containing Y in an amount of from 1 to 5 atm-% based on the total weight of Fe and Co in said ferromagnetic metal powder, and said binder comprises a polyurethane mainly comprising a diol component composed of a polyether polyol and a polyester polyol and a polyisocyanate component.
摘要翻译：公开了一种磁记录介质，其包括磁性层，该磁性层包括铁磁粉末和设置在非磁性载体的一侧上的粘合剂和设置在所述非磁性载体的另一侧上的背衬层，其中所述铁磁粉末是铁磁性的金属粉末，其以Fe为主要成分Co，以所述强磁性金属粉末中的Fe和Co的总重量计含有1〜5atm％的Y，所述粘合剂包含主要由二醇成分组成的聚氨酯的聚醚多元醇和聚酯多元醇和多异氰酸酯组分。

9. 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。

10. 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。

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