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    • 25. 发明授权
    • Magnetic head device
    • 磁头装置
    • US08967475B2
    • 2015-03-03
    • US13876229
    • 2012-03-28
    • Shigeo NakajimaKatsuhisa Higashi
    • Shigeo NakajimaKatsuhisa Higashi
    • G06K7/08G11B5/008G11B5/09
    • G06K7/082G06K7/084G11B5/00808G11B5/09G11B20/10037
    • A magnetic head device which suppresses output fluctuation even though the output changes in part of an output waveform from the magnetic head. The magnetic head device includes a magnetic head for reproducing information recorded in a magnetic information recording medium; an amplifier section for amplifying a reproduced signal that the magnetic head has reproduced, by using a gain; an A/D converter section for converting the reproduced signal that has been amplified, to a digital signal, by sampling the signal at predetermined intervals, in order to output the converted digital signal; a signal comparator section for comparing a digital signal output value with a predetermined output criterion value; and a gain control section for adjusting the gain in such a way as to make the output value closer to the output criterion value, in the case where the output value is either greater or smaller than the output criterion value.
    • 一种磁头装置,其抑制输出波动,即使输出部分从磁头的输出波形变化。 磁头装置包括用于再现记录在磁信息记录介质中的信息的磁头; 用于通过使用增益放大磁头已再现的再现信号的放大器部分; A / D转换器部分,用于通过以预定间隔对信号进行采样来将放大的再现信号转换为数字信号,以输出转换的数字信号; 信号比较器部分,用于将数字信号输出值与预定输出标准值进行比较; 以及增益控制部分,用于在输出值大于或小于输出标准值的情况下,调节增益以使得输出值更接近输出标准值。
    • 28. 发明申请
    • Asphalt composition containing hydrogenated conjugated diene copolymer
    • 含有氢化共轭二烯共聚物的沥青组合物
    • US20070179220A1
    • 2007-08-02
    • US11727839
    • 2007-03-28
    • Masahiro SasagawaToshinori ShirakiShigeo Nakajima
    • Masahiro SasagawaToshinori ShirakiShigeo Nakajima
    • C08L95/00
    • C08L95/00C08L53/02C08L53/025C08L53/00C08L2666/24
    • An asphalt composition comprising from 0.5 to 50 parts by weight of a hydrogenated conjugated diene copolymer (a) and 100 parts by weight of asphalt (b), wherein the hydrogenated conjugated diene copolymer (a) comprises a polymer block (A) comprising vinyl aromatic monomer units and at least one hydrogenated copolymer block (B) obtained by hydrogenation of a non-hydrogenated random copolymer block comprising conjugated diene monomer units and vinyl aromatic monomer units, the hydrogenated conjugated diene copolymer (a) having the following characteristics (1) to (5): (1) the content of the vinyl aromatic monomer units is more than 30% and not more than 60% by weight per weight of the hydrogenated conjugated diene copolymer; (2) the content of the polymer block (A) is from 5% to 50% by weight per weight of the hydrogenated copolymer; (3) the weight average molecular weight is from 30,000 to 500,000; (4) the percentage of hydrogenation of the double bonds in the conjugated diene monomer units is from 60% to 100%; and (5) at least one peak of the loss tangent (tan δ) is present in the range of from −40° C. to less than −10° C. in a dynamic viscoelastic spectrum obtained with respect to the hydrogenated copolymer.
    • 1.一种沥青组合物,其包含0.5〜50重量份的氢化共轭二烯共聚物(a)和100重量份的沥青(b),其中,所述氢化共轭二烯共聚物(a)包含含有乙烯基芳族化合物 单体单元和至少一种通过氢化包含共轭二烯单体单元和乙烯基芳族单体单元的非氢化无规共聚物嵌段获得的氢化共聚物嵌段(B),具有以下特征(1)至 (5):(1)乙烯基芳族单体单元的含量相对于氢化共轭二烯共聚物的重量为30重量%以上且60重量%以下。 (2)聚合物嵌段(A)的含量为氢化共聚物重量的5〜50重量% (3)重均分子量为30,000〜500,000; (4)共轭二烯单体单元中的双键氢化率为60〜100%。 和(5)在相对于氢化共聚物获得的动态粘弹性谱中,损耗角正切(tanδ)的至少一个峰值在-40℃至小于-10℃的范围内。
    • 29. 发明授权
    • Block copolymer and composition containing the copolymer
    • 含共聚物的嵌段共聚物和组合物
    • US06833413B2
    • 2004-12-21
    • US10030246
    • 2002-01-09
    • Masahiro SasagawaShigeki TakayamaShigeo Nakajima
    • Masahiro SasagawaShigeki TakayamaShigeo Nakajima
    • C08L5302
    • C09J123/02C08F8/04C08F297/04C08L23/02C08L23/06C08L23/10C08L53/02C08L53/025C08L2666/04C08L2666/24C09J153/025
    • An object of the present invention is to provide a block copolymer having the excellent improving characteristics. Specifically, the block copolymer is a hydrogenated block copolymer capable of obtaining a molded product, as a polyolefin based resin composition, having excellent physical property balance between impact resistance, in particular, low temperature impact resistance and rigidity, and molding processability, and further, capable of providing, as a viscous adhesive composition, a composition having an excellent balance between adhesion characteristics such as adhesive power and retentivity, and having excellent melt viscosity stability under heating at a high temperature. The block copolymer is a hydrogenation product of a block copolymer having at least one polymer block mainly comprising a vinyl aromatic hydrocarbon and at least one polymer block mainly comprising a conjugate diene compound, and having a vinyl bonding amount V (%) based on the conjugate diene compound of from not less than 37% to less than 70%, wherein (a) the total hydrogenation ratio H (%) of the unsaturated double bond based on the conjugate diene compound satisfies the following relational formulae: V
    • 本发明的目的是提供具有优异改进特性的嵌段共聚物。 具体而言,嵌段共聚物是能够得到耐冲击性,特别是低温耐冲击性,刚性与成型加工性的物性平衡优异的作为聚烯烃类树脂组合物的成型体的氢化嵌段共聚物, 能够提供作为粘性粘合剂组合物的粘合力和保持力等粘合特性之间具有优异平衡的组合物,并且在高温加热下具有优异的熔体粘度稳定性。嵌段共聚物是嵌段共聚物的氢化产物 具有至少一个主要包含乙烯基芳烃的聚合物嵌段和至少一个主要包含共轭二烯化合物的聚合物嵌段,并且具有基于共轭二烯化合物的乙烯基键合量V(%)不小于37% 70%以下,(a)不饱和双键的总氢化率H(%) d基于共轭二烯化合物满足以下关系式:其中(b)乙烯基键的氢化率为82%以上。