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    • 2. 发明授权
    • Process for preparing a copolymer aqueous solution from which a catalyst
residue is removed
    • 制备除去催化剂残余物的共聚物水溶液的方法
    • US4433098A
    • 1984-02-21
    • US312821
    • 1981-10-19
    • Hiroyuki ItohTeruaki YamanashiHirosuke Imai
    • Hiroyuki ItohTeruaki YamanashiHirosuke Imai
    • C08F6/00C08F6/02C08F6/06C08F6/08C08F220/00C08F220/04C08F222/00C08F222/06C08F236/00C08F236/06
    • C08F6/02
    • A process involves preparing an aqueous solution of a diolefin-maleic anhydride copolymer prepared by solution polymerization, said aqueous solution being free of tetramethylsuccinonitrile (TMSN), a by-product resulting from the decomposition of azobisisobutyronitrile (AIBN) used as a polymerization initiator for the copolymerization of the diolefin-maleic anhydride copolymer. The aqueous solution free of TMNS is obtained without the separation of the copolymer from the polymerization liquid in which the copolymer was prepared. The process is composed of the two distillation steps, the first distillation being for the removal of a solvent for polymerization and the second distillation being for the removal of water as well as TMSN. The first and second distillation steps can be carried out in a continuous or discontinuous manner. The first distillation step is carried out after and/or during the addition of water or a basic aqueous solution, and the second distillation can be effected with or without the addition of such liquid. This process is particularly effective for removal of TMSN which is highly toxic and causes problems from the safety point of view.
    • 一种方法包括制备通过溶液聚合制备的二烯烃 - 马来酸酐共聚物的水溶液,所述水溶液不含作为用作聚合引发剂的偶氮二异丁腈(AIBN)分解产生的副产物四甲基琥珀腈(TMSN) 二烯烃 - 马来酸酐共聚物的共聚合。 在不将共聚物与制备共聚物的聚合液体分离的情况下得到不含TMNS的水溶液。 该方法由两个蒸馏步骤组成,第一次蒸馏用于除去聚合用溶剂,第二次蒸馏用于除去水以及TMSN。 第一和第二蒸馏步骤可以以连续或不连续的方式进行。 第一蒸馏步骤在加入水或碱性水溶液之后和/或之后进行,第二蒸馏可以在添加或不添加这种液体的情况下进行。 该方法对于去除高毒性并从安全角度引起问题的TMSN特别有效。
    • 3. 发明授权
    • Anti-migration agent for dyeing
    • 抗迁移剂用于染色
    • US4337062A
    • 1982-06-29
    • US208496
    • 1980-11-20
    • Hirosuke ImaiTeruaki YamanashiHiroyuki Itoh
    • Hirosuke ImaiTeruaki YamanashiHiroyuki Itoh
    • D06P1/52D06P1/16D06P1/41
    • D06P1/525
    • According to this invention, there is provided an anti-migration agent for dyeing comprising a water-soluble, neutral polymer salt of a polymer anion and at least one cation, said polymer anion being a copolymer or a partially esterified matter thereof, said copolymer consisting of at least one monomer selected from the group consisting of C.sub.4 of C.sub.7 conjugated diene and isobutylene and at least one member selected from the group consisting of maleic acid, maleic anhydride and derivatives thereof, and said cation being selected from the group consisting of Na.sup.+, K.sup.+, Li.sup.+ and ammonium ions represented by the general formula R.sub.1 R.sub.2 R.sub.3 R.sub.4 N.sup.+ wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are selected from the group consisting of hydrogen, C.sub.1 to C.sub.6 alkyl, cycloalkyl and phenyl.
    • 根据本发明,提供了一种用于染色的抗迁移剂,其包含聚合物阴离子的水溶性中性聚合物盐和至少一种阳离子,所述聚合物阴离子是共聚物或其部分酯化物质,所述共聚物包括 的至少一种选自C 7共轭二烯和异丁烯的单体的单体和选自马来酸,马来酸酐及其衍生物的至少一种,所述阳离子选自Na +, K +,Li +和由通式R 1 R 2 R 3 R 4 N +表示的铵离子,其中R 1,R 2,R 3和R 4选自氢,C 1至C 6烷基,环烷基和苯基。
    • 10. 发明授权
    • Magnetic head for perpendicular magnetic recording and method of manufacturing same
    • 用于垂直磁记录的磁头及其制造方法
    • US07796361B2
    • 2010-09-14
    • US11727371
    • 2007-03-26
    • Yoshitaka SasakiHiroyuki ItohHironori ArakiShigeki Tanemura
    • Yoshitaka SasakiHiroyuki ItohHironori ArakiShigeki Tanemura
    • G11B5/31
    • G11B5/3116G11B5/1278G11B5/3163
    • A pole layer has a track width defining portion and a wide portion. The pole layer has: first and second side surfaces located opposite to each other in a first region extending from a medium facing surface to a position at a distance of 10 to 300 nm from the medium facing surface; third and fourth side surfaces located in a second region other than the first region; a fifth side surface located at the boundary between the first and second regions and connecting the first and third side surfaces to each other; and a sixth side surface located at the boundary between the first and second regions and connecting the second and fourth side surfaces to each other. The distance between the first and second side surfaces taken in the track width direction decreases with decreasing distance from the top surface of the substrate. The angle formed by the third and fourth side surfaces with respect to the direction orthogonal to the top surface of the substrate is smaller than that formed by the first and second side surfaces with respect to the direction orthogonal to the top surface of the substrate.
    • 极层具有轨道宽度限定部分和宽部分。 所述极层具有:第一和第二侧表面在从介质相对表面延伸到距介质面向表面10至300nm距离的位置的第一区域中彼此相对; 位于除了第一区域之外的第二区域中的第三和第四侧表面; 第五侧表面,位于第一和第二区域之间的边界处,并且将第一和第三侧表面彼此连接; 以及位于第一和第二区域之间的边界处并将第二和第四侧表面彼此连接的第六侧表面。 在轨道宽度方向上取得的第一和第二侧表面之间的距离随着距衬底顶表面的距离减小而减小。 由第三和第四侧面相对于与基板顶面垂直的方向形成的角度小于由第一和第二侧面相对于与基板顶面正交的方向形成的角度。