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    Magnetic recording member
    5.
    发明授权
    Magnetic recording member 失效
    磁记录部件

    公开(公告)号：US4154895A

    公开(公告)日：1979-05-15

    申请号：US862330

    申请日：1977-12-20

    申请人： Hiroshi Ogawa ,  Masashi Aonuma ,  Matsuaki Nakamura ,  Yasuo Tamai

    发明人： Hiroshi Ogawa ,  Masashi Aonuma ,  Matsuaki Nakamura ,  Yasuo Tamai

    IPC分类号： C09D5/23 ,  G11B5/702 ,  G11B5/706 ,  G11B5/708 ,  H01F10/02

    CPC分类号： G11B5/70621 ,  G11B5/7021 ,  G11B5/70615 ,  Y10S428/90 ,  Y10T428/31565 ,  Y10T428/31609

    摘要： In a magnetic recording member comprising a non-magnetic support having provided thereon a magnetic layer comprising finely divided ferromagnetic powders dispersed in a binder, in which the binder comprises about 10 to about 70 wt% of (a) a polyester-polyurethane resin and about 30 to about 90 wt% of (b) a synthetic non-drying oil modified alkyd resin and (c) a polyisocyanate, wherein the molar ratio of the isocyanate groups present in the polyisocyanate (c) to the hydroxyl groups present in the synthetic non-drying oil-modified alkyd resin (b) ranges from about 0.8:1 to about 2.0:1. The binder system in accordance with the present invention provides excellent magnetic properties, particularly improved squareness ratio and 5 MHz output. The binder system of the present invention also enables the use of finely divided ferromagnetic alloy powders, with excellent magnetic properties being maintained when magnetic recording members are produced therefrom.

    摘要翻译： 在包括非磁性载体的磁记录元件中，其上设置有包含分散在粘合剂中的细碎铁磁粉末的磁性层，其中粘合剂包含约10至约70重量％的（a）聚酯 - 聚氨酯树脂和约 30重量％至约90重量％的（b）合成非干性油改性醇酸树脂和（c）多异氰酸酯，其中存在于多异氰酸酯（c）中的异氰酸酯基与存在于合成非离子表面活性剂中的羟基的摩尔比 干燥油改性醇酸树脂（b）的范围为约0.8:1至约2.0:1。 根据本发明的粘结剂体系提供优异的磁性，特别是改进的矩形比和5MHz的输出。 本发明的粘合剂体系还能够使用精细分散的铁磁性合金粉末，当由其制造磁性记录元件时，其具有优异的磁性能。

    Method for preparing magnetic coating compositions
    7.
    发明授权
    Method for preparing magnetic coating compositions 失效
    磁性涂料组合物的制备方法

    公开(公告)号：US4952064A

    公开(公告)日：1990-08-28

    申请号：US459174

    申请日：1989-12-29

    申请人： Toshio Ono ,  Chiaki Mizuno ,  Yasuo Tamai ,  Hiroshi Ogawa

    发明人： Toshio Ono ,  Chiaki Mizuno ,  Yasuo Tamai ,  Hiroshi Ogawa

    IPC分类号： B01F3/12

    CPC分类号： B01F3/1207

    摘要： A single two-shaft continuous kneading and mixing machine, which is provided with a pair of shafts having blade members secured thereto, and a barrel accommodating the shafts such that they can be rotated, carries out kneading of a mixture of magnetic grains and a solution, which contains a binder in an organic solvent, in a normal kneading region and thereafter carries out dilution kneading of the mixture, which resulted after kneading in the normal kneading region was carried out, and an organic solvent in a dilution kneading region. The solids concentration in the mixture subjected to kneading in the normal kneading region is adjusted so that it falls within the range of 65 to 95 wt %. The solids concentration in the mixture subjected to dilution kneading is adjusted so that it falls within the range of 30 to 60 wt %. The width of a gap between blade members, which are secured to different shafts and which face each other, and the width of a gap between each blade member and the inner surface of the barrel in the dilution kneading region are made smaller than the widths of corresponding gaps in the normal kneading region.

    摘要翻译： 具有固定有刀片部件的一对轴的单个双轴连续捏和混合机和容纳轴的滚筒使其能够转动，进行磁性粒子和溶液的混合的捏合 在正常捏合区域中含有有机溶剂中的粘合剂，然后进行在正常混炼区域​​中捏合后混合物的稀释混炼和稀释混炼区域中的有机溶剂。 调整在正常捏合区域中进行捏合的混合物中的固体浓度，使其在65〜95重量％的范围内。 调整进行稀释混炼的混合物中的固体浓度，使其在30〜60重量％的范围内。 固定在不同轴上并且彼此面对的叶片构件之间的间隙的宽度以及稀释混合区域中的每个叶片构件和筒的内表面之间的间隙的宽度被制成小于 正常捏合区域中的相应间隙。

    Process for producing magnetic recording medium
    8.
    发明授权
    Process for producing magnetic recording medium 失效
    磁记录介质的制造方法

    公开(公告)号：US4724162A

    公开(公告)日：1988-02-09

    申请号：US39878

    申请日：1987-04-20

    申请人： Shinji Saito ,  Hiroshi Ogawa ,  Chiaki Mizuno ,  Toshio Ono ,  Yasuo Tamai

    发明人： Shinji Saito ,  Hiroshi Ogawa ,  Chiaki Mizuno ,  Toshio Ono ,  Yasuo Tamai

    IPC分类号： B01F3/12 ,  G11B5/702 ,  G11B5/842 ,  H01F10/02

    CPC分类号： G11B5/842 ,  G11B5/7028

    摘要： An improvement of a process for producing a magnetic recording medium comprising coating a non-magnetic support with a magnetic paint comprising a magnetic layer forming component containing ferromagnetic powder and a resin component dispersed in an organic solvent and drying the coated layer. The improvement resides in the preparation of the magnetic paint. In the improvement, the magnetic paint is obtained by kneading said magnetic layer forming component and a first solvent having a solubility parameter of not lower than 9.5[cal..multidot.cm.sup.-3 ].sup.1/2 as measured by Small method and adding a second solvent to the resulting kneaded product so that the mixed organic solvent in the magnetic paint has a solubility parameter of lower than 9.5[cal.multidot.cm.sup.-3 ].sup.1/2 to thereby disperse the magnetic layer forming component in the organic solvent.

    摘要翻译： 一种制造磁记录介质的方法的改进，包括用包含含有铁磁粉末的磁性层形成组分和分散在有机溶剂中的树脂组分的磁性涂料涂覆非磁性载体并干燥涂层。 改进在于磁性涂料的制备。 在此改进中，磁性涂料是通过将所述磁性层形成组分和溶解度参数不低于9.5 [cal.xcm-3] 1/2的第一种溶剂进行捏合而获得的，通过Small法测量，并将第二溶剂加入到 得到的混炼物，使得磁性涂料中的混合有机溶剂的溶解度参数低于9.5 [calxcm-3] 1/2，从而将磁性层形成组分分散在有机溶剂中。

    Magnetic recording medium
    9.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4687710A

    公开(公告)日：1987-08-18

    申请号：US898746

    申请日：1986-08-18

    申请人： Hiroshi Ogawa ,  Shinji Saito ,  Chiaki Mizuno ,  Yasuo Tamai

    发明人： Hiroshi Ogawa ,  Shinji Saito ,  Chiaki Mizuno ,  Yasuo Tamai

    IPC分类号： G11B5/708 ,  C09D5/23 ,  C09D7/12 ,  G11B5/71 ,  G11B5/73 ,  G11B5/704

    CPC分类号： G11B5/7305 ,  G11B5/71 ,  Y10S428/90 ,  Y10S428/91 ,  Y10T428/31663

    摘要： A magnetic recording medium comprising a nonmagnetic support and a magnetic recording layer provided on said support, said magnetic recording layer comprising a ferromagnetic powder dispersed in a binder, which is characterized in that said nonmagnetic support has heat shrinkage ratio of not higher than 1.0% at 110.degree. C. for 4 hours and said magnetic recording layer comprises at least one fatty acid and at least one modified silicon compound.

    摘要翻译： 一种包含非磁性载体和设置在所述载体上的磁记录层的磁记录介质，所述磁记录层包含分散在粘合剂中的铁磁性粉末，其特征在于，所述非磁性载体的热收缩率不高于1.0％ 110℃4小时，所述磁记录层包含至少一种脂肪酸和至少一种改性硅化合物。

    Magnetic recording medium
    10.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US4634632A

    公开(公告)日：1987-01-06

    申请号：US680217

    申请日：1984-12-10

    申请人： Hiroshi Ogawa ,  Shinji Saito ,  Yasuo Tamai

    发明人： Hiroshi Ogawa ,  Shinji Saito ,  Yasuo Tamai

    IPC分类号： C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/06 ,  G11B5/702 ,  G11B5/76

    CPC分类号： G11B5/7023 ,  Y10S428/90 ,  Y10T428/31609 ,  Y10T428/31931 ,  Y10T428/31935

    摘要： A magnetic recording medium having excellent electromagnetic properties and satisfactory running durability prepared by mixing a highly concentrated solution of copolymers for vinyl chloride, vinyl acetate and vinyl alcohol with ferromagnetic particles and kneeding them, and then adding a solution of rubber type resins and additives thereto and dispersing them, and if desired, by adding and mixing polyisocyanate compounds therewith.

    摘要翻译： 通过将氯乙烯，乙酸乙烯酯和乙烯醇的共聚物的高浓度溶液与铁磁颗粒混合并对其进行加工而制备的具有优异的电磁特性和令人满意的运行耐久性的磁记录介质，然后加入橡胶类树脂和添加剂溶液， 分散它们，如果需要，通过加入和混合多异氰酸酯化合物。