利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

8 条记录 (耗时 0.025 秒)

    Process for producing bistrimellitic imide
    2.
    发明授权
    Process for producing bistrimellitic imide 失效
    生产双歧杆菌的方法

    公开(公告)号：US5182392A

    公开(公告)日：1993-01-26

    申请号：US791534

    申请日：1991-11-14

    申请人： Hiroka Tanisake ,  Takeshi Koyama ,  Tsuyoshi Isozaki

    发明人： Hiroka Tanisake ,  Takeshi Koyama ,  Tsuyoshi Isozaki

    IPC分类号： C07D209/48 ,  C08G73/10

    CPC分类号： C07D209/48 ,  C08G73/1032

    摘要： A process for producing a bistrimellitic imide of the formula (2) ##STR1## wherein X is an aliphatic group having at least 2 carbon atoms, an alicyclic group or an aromatic group,which comprises reacting a trimellitic anhydride with a diamine of the formula (1)H.sub.2 N--X--NH.sub.2 (1)wherein X is as defined above, in the presence of a solvent mixture containing an aprotic polar solvent and an aromatic hydrocarbon solvent which can be distilled azeotropically with water, the amount of the aromatic hydrocarbon solvent being 10 to 90% by weight based on the total weight of these two solvents.

    Melt-processable copolyester
    4.
    发明授权
    Melt-processable copolyester 失效
    熔融加工共聚聚酯

    公开(公告)号：US5045627A

    公开(公告)日：1991-09-03

    申请号：US394419

    申请日：1989-08-16

    申请人： Hiroka Tanisake ,  Koji Yamamoto ,  Toshizumi Hirota

    发明人： Hiroka Tanisake ,  Koji Yamamoto ,  Toshizumi Hirota

    IPC分类号： C08G63/60 ,  C08G63/66

    CPC分类号： C08G63/605 ,  C08G63/66

    摘要： A melt-processable copolyester consisting essentially of:a structural unit (I) of formula (1-1) ##STR1## and formula (1-2) ##STR2## wherein the amount of the species of formula (1-2) is 5 to 95 mole % of the structural unit (I),a structural unit (II) of formula (2)--O--X--O-- (2)wherein X is at least one selected from the group consisting of ##STR3## and a structural unit (III) of formula (3)--O--Y--CO-- (3)wherein Y is at least one selected from the group consisting of ##STR4## the proportion of the structural unit (III) being 10 to 80 mole % of the structural units (I)+(II)+(III) in total, the structural unit (I) being substantially equimolar to the structural unit (II) and inherent viscosity (ln .eta..sub.rel)/C, measured in a concentration of 0.16 g/dl in pentafluorophenol at 60.degree. C., being not less than 0.5 dl/g.

    Copolyester from 1,6-bis(phenoxy)hexane-4,4'-dicarboxylate
    7.
    发明授权
    Copolyester from 1,6-bis(phenoxy)hexane-4,4'-dicarboxylate 失效
    1,6-双（苯氧基）己烷-4,4'-二羧酸酯的共聚酯

    公开(公告)号：US4983707A

    公开(公告)日：1991-01-08

    申请号：US473153

    申请日：1990-01-31

    申请人： Hiroka Tanisake ,  Koji Yamamoto ,  Toshizumi Hirota ,  Kazunobu Maruo

    发明人： Hiroka Tanisake ,  Koji Yamamoto ,  Toshizumi Hirota ,  Kazunobu Maruo

    IPC分类号： C08G63/672 ,  C08G63/19 ,  C08G63/60

    CPC分类号： C08G63/60

    摘要： A melt-processable copolyester comprising:a structural unit (I) of the formula (1), ##STR1## a structural unit (II) of the formula (2),--OC--X--CO-- (2)wherein X is at least one member selected from the group consisting of ##STR2## a structural unit (III) of the formula (3)--O--Y--O-- (3)wherein Y is at least one member selected from the group consisting of ##STR3## and a structural unit (IV) of the formula (4)--O--Z--CO-- (4)wherein Z represents at least one member selected from the group consisting of ##STR4## the ratio of the structural unit (IV) (III) to the structural units [(I)+(II)+(III)+(IV)] in total being 5 to 80 mole%, the structural units [(I)+(II)] being substantially equimolar to the structural unit (III), the ratio of the structural unit (I) to the structural units [(I)+(II)] in total being 10 to 90 mole %, and the copolyester having an inherent viscosity (ln .eta..sub.rel)/C, measured in a concentration of 0.16 g/dl in pentafluorophenol at 60.degree. C., of not less than 0.3 dl/g.