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    Magnetic rubber composition for encoder
    82.
    发明申请
    Magnetic rubber composition for encoder 审中-公开
    编码器用磁性橡胶组合物

    公开(公告)号：US20070149679A1

    公开(公告)日：2007-06-28

    申请号：US11709810

    申请日：2007-02-23

    Applicant: Yoshihiko Yamaguchi

    Inventor： Yoshihiko Yamaguchi

    IPC: C08K3/22

    CPC classification number: H01F1/117 ,  C08K3/22 ,  C08K5/548 ,  C08K2201/01 ,  G01D5/244 ,  C08L15/005

    Abstract: A magnetic rubber composition for encoder having a magnetic characteristic in sufficient application range, used as encoder after magnetization as well as heat resistance, water resistance and oil resistance required for use as encoder, and excellent processing property, and capable of being bonded by vulcanization with a metal, is provided. Furthermore, a magnetic rubber composition for encoder capable of obtaining sufficient magnetic force required for encoder on a circumference of the molded encoder as well as capable of effectively restraining variation of the level of magnetic force, is provided. It is provided by comprising 300 to 1,800 parts of strontium-ferrite, or 300 to 1,800 parts of barium-ferrite, or 300 to 1,800 parts of a mixture of strontium-ferrite and barium-ferrite, 0.5 to 2 parts of silane coupling agent, and 1 to 10 parts of lubricating agent, per 100 parts of a hydrogenated nitrile butadiene rubber with 15 to 50% of acrylonitrile amount and 80 to 99% of hydrogenation ratio.

    Abstract translation: 一种用于编码器的磁性橡胶组合物，其具有足够应用范围的磁特性，用作磁化后的编码器以及用作编码器所需的耐热性，耐水性和耐油性，以及优异的加工性能，并且能够通过硫化与 提供金属。 此外，提供了一种用于编码器的磁性橡胶组合物，其能够在模制编码器的圆周上获得编码器所需的足够的磁力，并且能够有效地抑制磁力水平的变化。 通过将锶铁氧体300〜1,800份，钡铁氧体300〜1800份，锶铁氧体和钡铁氧体的混合物300〜1,800份，硅烷偶联剂0.5〜2份， 和1至10份润滑剂，每100份氢化丁腈橡胶中丙烯腈含量为15-50％，氢化率为80-99％。

    Flexible high energy magnetic blend compositions based on ferrite particles in highly saturated nitrile rubber and methods of processing the same
    83.
    发明授权
    Flexible high energy magnetic blend compositions based on ferrite particles in highly saturated nitrile rubber and methods of processing the same 失效
    基于高饱和丁腈橡胶中的铁氧体颗粒的柔性高能磁共混组合物及其加工方法

    公开(公告)号：US5002677A

    公开(公告)日：1991-03-26

    申请号：US409491

    申请日：1989-09-19

    Applicant: Raymond C. Srail ,  Richard A. Glover ,  Tiong H. Kuan ,  Thomas R. Szczepanski

    Inventor： Raymond C. Srail ,  Richard A. Glover ,  Tiong H. Kuan ,  Thomas R. Szczepanski

    IPC: C08L101/00 ,  C08K3/22 ,  C08K3/24 ,  H01F1/113 ,  H01F1/117

    CPC classification number: H01F1/117 ,  C08K3/22 ,  C08K3/24 ,  C08K2201/01 ,  Y10S428/90

    Abstract: A flexible magnetic blend composition is provided which is comprised of high energy ferrite magnetic particles in a flexible high temperature resistant and oil resistant polymer binder. The binder system is preferably a highly saturated nitrile rubber (HSN) or a polymer alloy of the same in which a HSN is the major polymer containing alloying polymers and/or additives which are compatible with processing, subsequent electron beam curing, and final product performance. The binder system is highly loaded usually from 55 to 65 volume percent with the high energy ferrite particles, i.e., barium and/or strontium ferrite particles, which can produce bonded magnets with a maximum energy product of at least 1.0 megagauss-oersteds, a remenance, Br, of at least 2000 gauss, a coercive force, H.sub.c, of at least 1800 oersteds, and an intrinsic coercivity, H.sub.ci, of at least 2000 oersteds. The process for production of this system involves the binder system and ferrite particles being mixed, the ferrite particles oriented in a preferred direction during processing, then formed into a final geometry before being cured by high voltage electron beam radiation, preferably in excess of 3,000,000 electron volts. The electron beam curing in the solid state fixes dimensional stability, magnetic properties, oil, solvent, and chemical resistance of the part even when exposed to subsequent hostile temperature environments of 125.degree. C. or higher. Any off geometry parts or trim produced in the process prior to radiation curing can be recycled through processing several times without fear of premature cure.

    Flexible ferrite-particle magnets
    84.
    发明授权
    Flexible ferrite-particle magnets 失效
    柔性铁氧体颗粒磁铁

    公开(公告)号：US3903228A

    公开(公告)日：1975-09-02

    申请号：US22920072

    申请日：1972-02-24

    Applicant: MINNESOTA MINING & MFG

    Inventor： RIEDL KENNETH M ,  NELSON KARL E

    IPC: C04B35/26 ,  C08K3/22 ,  H01F1/11 ,  H01F1/117 ,  B24D3/02

    CPC classification number: H01F1/117 ,  C04B35/2683 ,  C08K3/22 ,  C08K2201/01 ,  H01F1/11 ,  C08L21/00

    Abstract: Process for making barium ferrite particles which are especially adapted to mechanical orientation in admixture with a workable nonmagnetic matrix material to provide flexible magnets of extraordinarily high magnetic values. Starting with acicular alpha-Fe2O3 particles, BaCO3, a fluxing agent such as NaF and a lead compound such as PbO, magnetic particles are obtained which provide, when oriented in a rubber matrix, permanent magnet material having a maximum energy product of at least 1.4 X 106 gauss-oersteds.

    Abstract translation: 制造钡铁氧体颗粒的方法，其特别适用于与可使用的非磁性基体材料混合的机械取向，以提供特别高的磁性值的柔性磁体。 从针状α-Fe2O3颗粒开始，获得BaCO3，助熔剂如NaF和铅化合物如PbO，磁性颗粒，当在橡胶基质中定向时，其具有至少为1.4的最大能量积的永磁体材料 x 106高斯奥斯特。

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