公开(公告)号：US4482610A

公开(公告)日：1984-11-13

申请号：US345907

申请日：1982-02-04

申请人： Tsutomu Okita ,  Kyoichi Naruo

发明人： Tsutomu Okita ,  Kyoichi Naruo

IPC分类号： C09D5/23 ,  G11B5/702 ,  G11B5/842 ,  H01F10/02

CPC分类号： G11B5/7026 ,  Y10S428/90 ,  Y10T428/31797

摘要： A magnetic recording medium and a process for producing a magnetic recording medium are disclosed, the process comprising the steps of applying to a non-magnetic base a composition comprising (1) a compound having an unsaturated bond polymerizable by electron beams, (2) a compound having one or more carbon-carbon unsaturated bonds, (3) ferromagnetic particles and (4) an organic solvent, and polymerizing and curing the applied coating by irradiation with electron beams, said compound having one or more unsaturated bonds is such that at least 10 wt % thereof is adsorbed onto the ferromagnetic particles in a mixture of 10 parts by weight of a 1 wt % solution of the compound and 1 part by weight of the ferromagnetic particles.

摘要翻译： 公开了磁记录介质和制造磁记录介质的方法，该方法包括以下步骤：向非磁性基底施加组合物，该组合物包含（1）具有可通过电子束聚合的不饱和键的化合物，（2） 具有一个或多个碳 - 碳不饱和键的化合物，（3）铁磁颗粒和（4）有机溶剂，并且通过用电子束照射聚合和固化涂覆的涂层，所述具有一个或多个不饱和键的化合物至少使得至少 10重量％以10重量份的化合物1重量％和1重量份铁磁性颗粒的混合物吸附在铁磁性颗粒上。

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。

公开(公告)号：US4191679A

公开(公告)日：1980-03-04

申请号：US938161

申请日：1978-08-30

申请人： Tsutomu Okita ,  Masami Satou ,  Noburo Hibino ,  Kazunobu Katoh ,  Masatoshi Sugiyama

发明人： Tsutomu Okita ,  Masami Satou ,  Noburo Hibino ,  Kazunobu Katoh ,  Masatoshi Sugiyama

IPC分类号： C08L67/00 ,  C09B1/42 ,  G03C1/795 ,  G03C1/83 ,  C08K5/08 ,  G03C1/84

CPC分类号： G03C1/83

摘要： A photographic polyester film support which is dyed with (a) a dye having a main absorption peak in the wavelength range of about 530 to about 570 nm, (b) a dye having a main absorption peak in the wavelength range of about 640 to about 680 nm and (c) a dye having a main absorption peak in the wavelength range of about 420 to about 460 nm which is represented by the formula (I) below: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6, which may be the same or different, each represents --H, --OH, --NH.sub.2, --NHR.sub.7, --NR.sub.7 R.sub.8, --Cl, --Br, an alkyl group having 4 or less carbon atoms or an alkoxy group having 4 or less carbon atoms; and R.sub.7 and R.sub.8, which may be the same or different, each represents an alkyl group having 4 or less carbon atoms or an aryl group.

摘要翻译： 一种照相聚酯膜载体，其用（a）在约530至约570nm的波长范围内具有主要吸收峰的染料染色，（b）在约640至约波长范围内具有主吸收峰的染料 680nm，和（c）由下式（I）表示的在大约420至大约460nm的波长范围内具有主吸收峰的染料：其中R1，R2，R3，R4， R 5和R 6可以相同或不同，表示-H，-OH，-NH2，-NHR7，-NR7R8，-Cl，-Br，具有4个或更少碳原子的烷基或具有4个 或更少的碳原子; 和可以相同或不同的R 7和R 8各自表示具有4个以下碳原子的烷基或芳基。

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。

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。

公开(公告)号：US5098783A

公开(公告)日：1992-03-24

申请号：US228421

申请日：1988-08-05

申请人： Hideomi Watanabe ,  Tsutomu Okita

发明人： Hideomi Watanabe ,  Tsutomu Okita

IPC分类号： C09D5/23 ,  G11B5/73 ,  G11B5/735

CPC分类号： G11B5/735 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/265 ,  Y10T428/2982 ,  Y10T428/3158

摘要： A magnetic recording medium comprising a non-magnetic support having on one surface thereof a magnetic layer and on the opposite surface thereof a backing layer comprising non-magnetic particles dispersed in a binder containing a copolymer of (a) at least one of a vinyl monomer containing a dialkylaminoalkyl group and a vinyl monomer containing a quaternary salt of a dialkylaminoalkyl group, and (b) a copolymerizable vinyl monomer.

摘要翻译： 一种磁记录介质，包括在其一个表面上具有磁性层的非磁性载体，并且在其相对表面上具有包含分散在包含（a）乙烯基单体 含有二烷基氨基烷基和含有二烷基氨基烷基的季盐的乙烯基单体，和（b）可共聚的乙烯基单体。

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。

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。

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。

公开(公告)号：US4970121A

公开(公告)日：1990-11-13

申请号：US229411

申请日：1988-08-08

申请人： Fumihiro Tokunaga ,  Jun Nakagawa ,  Tsutomu Okita ,  Toshio Kawamata ,  Kazuo Hasumi

发明人： Fumihiro Tokunaga ,  Jun Nakagawa ,  Tsutomu Okita ,  Toshio Kawamata ,  Kazuo Hasumi

IPC分类号： C08L75/04 ,  G11B5/702 ,  G11B5/708 ,  G11B5/71

CPC分类号： G11B5/71 ,  C08L75/04 ,  G11B5/7022 ,  G11B5/7085 ,  Y10S428/90 ,  Y10T428/31507 ,  Y10T428/31565 ,  Y10T428/31609

摘要： A magnetic recording medium comprising a nonmagnetic support having thereon a magnetic layer comprising ferromagnetic particles dispersed in a binder comprising a mixture of a polycarbonate polyurethane and a phenoxy resin in a weight ratio of from about 1.5:1 to 5:1.

摘要翻译： 一种磁记录介质，其包含非磁性载体，其上具有包含分散在包含聚碳酸酯聚氨酯和苯氧基树脂的混合物的粘合剂中的铁磁颗粒的磁性层，重量比为约1.5:1至5:1。