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1. 发明授权

US4619868A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4619868A
公开(公告)日：1986-10-28
申请号：US521808
申请日：1983-08-10
申请人： Tsutomu Okita , Kyoichi Naruo , Hiroshi Hashimoto
发明人： Tsutomu Okita , Kyoichi Naruo , Hiroshi Hashimoto
IPC分类号： C09D5/23 , C09D101/18 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/70
CPC分类号： G11B5/7026 , G11B5/7022 , G11B5/7023 , Y10S428/90 , Y10T428/31544 , Y10T428/31591 , Y10T428/31935
摘要： A magnetic recording medium comprised of a support having a magnetic layer coated thereon is disclosed. The magnetic layer is comprised of a binder composition having a ferromagnetic powder dispersed therein. The binder composition is cured by an electron beam. The composition is comprised of 50 to 400 parts by weight of a compound having 2 or more acryloyl groups or methacryloyl groups in the molecule and 100 parts by weight of a mixture of 20 to 80 parts by weight of a thermoplastic resin having a thermal deformation temperature of 70.degree. C. or more and 20 to 80 parts by weight of a rubber type resin. The material has excellent electromagnetic properties after repeated use. Further, the medium has high physical strength and excellent wear resistance.
摘要翻译：公开了一种由其上涂覆有磁性层的支撑体组成的磁记录介质。磁性层由其中分散有铁磁粉末的粘合剂组合物组成。粘合剂组合物通过电子束固化。该组合物由分子中具有2个以上丙烯酰基或甲基丙烯酰基的化合物50〜400重量份，20重量份20〜80重量份的热变形温度 70℃以上20〜80重量份的橡胶类树脂。该材料重复使用后具有优异的电磁特性。此外，介质具有高的物理强度和优异的耐磨性。

2. 发明授权

US4560616A Magnetic recording medium having binder cured by electron beam radiation 失效
标题翻译：具有通过电子束辐射固化的粘合剂的磁记录介质
公开(公告)号：US4560616A
公开(公告)日：1985-12-24
申请号：US521797
申请日：1983-08-09
申请人： Tsutomu Okita , Kyoichi Naruo , Hiroshi Hashimoto
发明人： Tsutomu Okita , Kyoichi Naruo , Hiroshi Hashimoto
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/70
CPC分类号： G11B5/702 , Y10S428/90 , Y10T428/31551 , Y10T428/31935
摘要： A magnetic recording medium comprising a support having coated thereon a magnetic layer is disclosed. The magnetic layer is comprised of a binder composition having ferromagnetic particles dispersed therein. The binder composition is cured by an electron beam and comprises a copolymer, a urethane resin and a compound having two or more acryloyl groups or methacryloyl groups. The copolymer may be a vinyl chloride-vinyl acetate-vinyl alcohol copolymer having a vinyl alcohol content of 1 to 15 wt % or a vinyl chloride-vinyl acetate-maleic acid copolymer having a maleic acid content of 1 to 10 wt %. The recording medium has excellent electromagnetic properties and the magnetic layer has excellent dynamic properties.
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。磁性层由其中分散有铁磁颗粒的粘合剂组合物组成。粘合剂组合物通过电子束固化，并包含共聚物，聚氨酯树脂和具有两个或更多个丙烯酰基或甲基丙烯酰基的化合物。共聚物可以是乙烯醇含量为1〜15重量％的氯乙烯 - 乙酸乙烯酯 - 乙烯醇共聚物或马来酸含量为1〜10重量％的氯乙烯 - 乙酸乙烯酯 - 马来酸共聚物。记录介质具有优良的电磁特性，磁性层具有优异的动态特性。

3. 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。

4. 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。

5. 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。

6. 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。

7. 发明授权

US5061564A Magnetic recording medium comprising a polar group containing resin or compound and a methyl iso ester lubricant prepared from a methyl iso acid or methyl iso alcohol or both 失效
标题翻译：包含含有极性基团的树脂或化合物的磁记录介质和由甲基异酸或甲基异丙醇或两者制备的甲基异酯润滑剂
公开(公告)号：US5061564A
公开(公告)日：1991-10-29
申请号：US382934
申请日：1989-07-21
申请人： Takao Ohya , Jun Nakagawa , Satoru Hayakawa , Yasuo Nishikawa , Tsutomu Okita , Hiroshi Hashimoto
发明人： Takao Ohya , Jun Nakagawa , Satoru Hayakawa , Yasuo Nishikawa , Tsutomu Okita , Hiroshi Hashimoto
IPC分类号： G11B5/71 , G11B5/72
CPC分类号： G11B5/71 , G11B5/72 , Y10S428/90 , Y10T428/31 , Y10T428/31551 , Y10T428/3158
摘要： A magnetic recording medium is disclosed, which comprises a non-magnetic support having provided thereon a magnetic layer mainly composed of a ferromagnetic powder and a binder resin comprising (i) a polymer having at least one polar group selected from --SO.sub.3 M.sup.1, --OSO.sub.3 M.sup.1, --COOM.sup.1, ##STR1## wherein M.sup.1 represents a hydrogen atom, Li, Na or NR.sub.4 (wherein R represents a hydrogen atom, an alkyl group, an alkenyl group, or an alkanol group), and M.sup.2 represents a hydrogen atom, Li, Na, an alkyl group, or NR.sub.4 (wherein R has the same significance as defined above); or (ii) a compound having at least one polar group selected from --SO.sub.3 M.sup.3, --COOM.sup.3, and --PO.sub.3 (M.sup.3).sub.2 (wherein M.sup.3 represents a hydrogen atom, an alkali metal, or an ammonium group) and containing at least one carbon-carbon unsaturated bond in the molecule, said magnetic layer containing at least one ester compound represented by following formula (I), (II), or (III), and when the binder resin comprises the compound (ii), the magnetic layer is irradiated by radiations: ##STR2## wherein R.sup.1 represents a straight chain or branched alkyl group having from 7 to 29 carbon atoms or a straight chain or branched alkenyl group having from 7 to 29 carbon atoms; l, k, m, and n represents an integer; l and n each is at least 2, and the sum of n and m and the sum of k and l are from 7 to 33.
摘要翻译：公开了一种磁记录介质，其包括其上设置有主要由铁磁粉末和粘合剂树脂构成的磁性层的非磁性载体，所述磁性层包含（i）具有至少一个选自-SO 3 M 1，-OSO 3 M 1， -COOM1，其中M1表示氢原子，Li，Na或NR4（其中R表示氢原子，烷基，烯基或链烷醇基），M2表示氢原子，Li，Na ，烷基或NR4（其中R具有与上述相同的含义）; 或（ii）具有选自-SO 3 M 3，-COOM 3和-PO 3（M3）2中的至少一个极性基团的化合物（其中，M3表示氢原子，碱金属或铵基），并且含有至少一个碳所述磁性层含有至少一种由下式（I），（II）或（III）表示的酯化合物，并且当粘合剂树脂包含化合物（ii）时，磁性层为（I）其中R1表示具有7至29个碳原子的直链或支链烷基或具有7个碳原子的直链或支链烯基至29个碳原子; l，k，m，n表示整数; l和n各自为至少2，n和m之和以及k和l之和为7至33。

8. 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。

9. 发明授权

US4707380A Process 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：US4707380A
公开(公告)日：1987-11-17
申请号：US875259
申请日：1986-06-17
申请人： Hiroshi Hashimoto , Tsutomu Okita , Yoshito Mukaida
发明人： Hiroshi Hashimoto , Tsutomu Okita , Yoshito Mukaida
IPC分类号： G11B5/73 , G11B5/84 , H01F10/02
CPC分类号： G11B5/84 , G11B5/7305
摘要： A process for preparing a magnetic recording medium is described, comprising subjecting a surface of a non-magnetic support having a surface roughness of not less than 0.01 .mu.m to a non-contact surface treatment, providing a layer containing a compound polymerizable by radiation exposure on the surface of the support, exposing said layer to radiation, and then providing a magnetic layer on the radiation-exposed layer.
摘要翻译：描述了一种制备磁记录介质的方法，包括使表面粗糙度不小于0.01μm的非磁性载体的表面进行非接触表面处理，从而提供含有通过辐射曝光可聚合的化合物的层在支撑体的表面上，将所述层暴露于辐射，然后在辐射暴露层上提供磁性层。

10. 发明授权

US4673590A Process 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：US4673590A
公开(公告)日：1987-06-16
申请号：US833680
申请日：1986-02-25
申请人： Hiroshi Hashimoto , Tsutomu Okita , Noburo Hibino
发明人： Hiroshi Hashimoto , Tsutomu Okita , Noburo Hibino
IPC分类号： G11B5/73 , G11B5/84 , H01F10/02
CPC分类号： G11B5/84 , G11B5/7305
摘要： A process for preparing a magnetic recording medium is disclosed, which comprises (1) subjecting a surface of a non-magnetic support having a surface roughness of not less than 0.01 .mu.m to an abrasion treatment or a calendering treatment, (2) coating a layer containing a compound polymerizable by radiation exposure on the surface of non-magnetic support, (3) exposing the layer to radiation to polymerize and harden the same, and (4) providing a magnetic layer on the radiation exposed layer. The thus prepared magnetic recording medium is not accompanied by dropout due to "fish eyes" and is suitable for high density recording.
摘要翻译：公开了一种制备磁记录介质的方法，其包括：（1）对具有不小于0.01μm的表面粗糙度的非磁性载体的表面进行磨损处理或压延处理，（2）包含通过辐射暴露可聚合的化合物在非磁性载体的表面上，（3）将该层暴露于辐射以聚合并使其硬化，以及（4）在辐射暴露层上提供磁性层。这样制备的磁记录介质不伴随“鱼眼”的脱落，适用于高密度记录。

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