Method for preparing polyhydroxycarboxylic acid resin
    32.
    发明授权
    Method for preparing polyhydroxycarboxylic acid resin 失效
    聚羟基羧酸树脂的制备方法

    公开(公告)号:US5734007A

    公开(公告)日:1998-03-31

    申请号:US674453

    申请日:1996-07-02

    申请人: Junzo Otera Toru Yano

    发明人: Junzo Otera Toru Yano

    CPC分类号: C08G63/85 C08G63/06

    摘要: There is provided a method for easily preparing a polyhydroxycarboxylic acid resin in a one pot reaction by adding 1,3-substituted-1,1,3,3-tetraorganodistanoxan as a polymerization catalyst to a hydroxycarboxylic acid, such as L-lactic acid containing 10 to 50% of water as a starting material, and stirring while heating under a reduced pressure condition or in an organic solvent.

    摘要翻译: 提供了在一锅反应中容易地制备聚羟基羧酸树脂的方法,其中加入作为聚合催化剂的1,3-取代-1,1,3,3-四有机酪氨酸氧化物到羟基羧酸如含L-乳酸的 10〜50%的水作为原料,在减压条件下或有机溶剂中加热搅拌。

    Leaf brushes for small electric motor
    34.
    发明授权
    Leaf brushes for small electric motor 失效
    小电动叶片

    公开(公告)号:US4529899A

    公开(公告)日:1985-07-16

    申请号:US545234

    申请日:1983-10-25

    CPC分类号: H01R39/18

    摘要: Leaf brushes for small electric motors having commutator slide surfaces for making electrical contact with a motor commutator and constructed so that a multiplicity of fine ridges are densely formed on the commutator slide surfaces.

    摘要翻译: 具有用于与电动机换向器电接触的换向器滑动表面的小型电动机的叶子刷构造成使得在换向器滑动表面上密集地形成多个细脊。

    Optical recording medium and method of manufacturing the same
    40.
    发明授权
    Optical recording medium and method of manufacturing the same 失效
    光记录介质及其制造方法

    公开(公告)号:US08105750B2

    公开(公告)日:2012-01-31

    申请号:US11909781

    申请日:2007-01-26

    IPC分类号: G11B7/24

    摘要: Recording and reproducing characteristics and data saving reliability are secured in a write-once two-layer recording medium.A second recording layer from a side irradiated with light for recording and reproduction includes organic dye shown by a general formula of a chemical formula 3 described below (in the formula, R1 and R2 are alkyl groups of carbon number 1 to 4; Y1, Y2 respectively are organic groups independently; and X is Cl04, BF4, PF6, SbF6), and organic dye shown by a general formula of a chemical formula 4 described below (in the formula, R1, R4 are alkyl groups of carbon number 1 to 4; R2, R3 are alkyl groups of carbon number 1 to 4 or groups forming 3 to 6 membered rings by being coupled; Y1, Y2 respectively are organic groups independently; and X is Cl04, BF4, PF6, SbF6), to secure durability.

    摘要翻译: 记录和再现特性和数据保存可靠性确保在一次写入的双层记录介质中。 从用于记录和再现的光照射的一侧的第二记录层包括由下述化学式3的通式表示的有机染料(在该式中,R 1和R 2是碳数1至4的烷基; Y 1,Y 2 分别为有机基团,X为ClO 4,BF 4,PF 6,SbF 6),下述化学式4的通式表示的有机染料(式中,R 1,R 4为碳数1〜4的烷基 ; R 2,R 3为碳数为1〜4的烷基或通过偶联形成3〜6元环的基团; Y1,Y2分别独立地为有机基团,X为ClO 4,BF 4,PF 6,SbF 6),以确保耐久性。