利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

14 条记录 (耗时 0.02 秒)

    Photosensitive polyimide precursor and process for producing the same
    11.
    发明授权
    Photosensitive polyimide precursor and process for producing the same 失效
    感光聚酰亚胺前体及其制备方法

    公开(公告)号：US4670535A

    公开(公告)日：1987-06-02

    申请号：US875044

    申请日：1986-06-17

    申请人： Akitoshi Sugio ,  Takao Kawaki ,  Katsushige Hayashi

    发明人： Akitoshi Sugio ,  Takao Kawaki ,  Katsushige Hayashi

    IPC分类号： C08G73/00 ,  C08F290/00 ,  C08F299/02 ,  C08G73/10 ,  C08G73/12 ,  G03F7/038 ,  C08G16/00

    CPC分类号： C08G73/1082 ,  G03F7/0387

    摘要： The photosensitive polyimide precursor of the invention has a recurring unit represented by the following general formula [I]: ##STR1## (R.sub.1 represents a tetravalent aromatic hydrocarbon residue; R.sub.2 and R.sub.3 each represent a divalent aromatic or aliphatic hydrocarbon residue; and R.sub.4 represents a divalent aromatic hydrocarbon residue represented by ##STR2## wherein R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11 and R.sub.12, identical or different, each represent hydrogen atom, a halogen group or an alkyl group). The photosensitive polyimide precursor of the invention has a viscosity of 50 centipoises or above as measured at 23.degree. C. in the state of a 10% (by weight) solution in N,N-dimethylacetamide. Its photosensitivity is as high as about 20-100 times that of prior products. After heat cyclization, it exhibits a heat resistance of 400.degree. C. or above.The photosensitive polyimide precursor of the invention can be produced by subjecting a tetracarboxylic acid dianhydride and a diamino compound to a polycondensation reaction in an organic polar solvent.

    摘要翻译： 本发明的光敏聚酰亚胺前体具有由以下通式[I]表示的重复单元：（R 1表示四价芳烃残基; R 2和R 3各自表示二价芳族或脂族烃 R4代表由下式表示的二价芳烃残基：其中R5，R6，R7，R8，R9，R10，R11和R12相同或不同，分别代表氢原子，卤素基团或烷基）。 本发明的光敏聚酰亚胺前体在23℃下的粘度为10厘泊（N，N-二甲基乙酰胺）溶液的状态下的粘度为50厘泊或更高。 其光敏度高达现有产品的约20-100倍。 热环化后，其耐热性为400℃以上。 本发明的感光性聚酰亚胺前体可以通过在有机极性溶剂中使四羧酸二酐和二氨基化合物进行缩聚反应来制造。

    Aromatic polycarbonate
    12.
    发明授权
    Aromatic polycarbonate 有权
    芳香聚碳酸酯

    公开(公告)号：US06255436B1

    公开(公告)日：2001-07-03

    申请号：US09444933

    申请日：1999-11-22

    申请人： Masatoshi Kimura ,  Michio Kawai ,  Hiroshi Takeguchi ,  Hiroshi Nakano ,  Masayuki Nakajima ,  Katsushige Hayashi

    发明人： Masatoshi Kimura ,  Michio Kawai ,  Hiroshi Takeguchi ,  Hiroshi Nakano ,  Masayuki Nakajima ,  Katsushige Hayashi

    IPC分类号： C08G6400

    CPC分类号： C08G64/307

    摘要： An aromatic polycarbonate of the present invention is produced by reacting an aromatic dihydroxy compound with a compound capable of introducing a carbonate bond, and has a viscosity-average molecular weight of 12,000 to 40,000 and a content of a cyclic oligomer represented by the formula (1) of not more than 1,000 ppm, in which the percentage of the content of said cyclic oligomer represented by the formula (1) based on the total contents of the cyclic oligomer represented by the formula (1), an oligomer represented by the formula (2) and an oligomer represented by the formula (3) satisfies the following relational formula [I]: 0

    摘要翻译： 本发明的芳香族聚碳酸酯是通过使芳香族二羟基化合物与能够引入碳酸酯键的化合物反应而制造的，粘均分子量为12,000〜40,000，由式（1）表示的环状低聚物的含量 ）不超过1000ppm，其中由式（1）表示的所述环状低聚物的含量的百分比基于由式（1）表示的环状低聚物的总含量，由式（1）表示的低聚物 2）和式（3）表示的低聚物满足以下关系式[I]：其中（1），（2）和（3）是由上式（1），（2）表示的低聚物的含量， 和（3）分别; Mv是所述芳族聚碳酸酯的粘均分子量。