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    • 34. 发明授权
    • Polyimide
    • 聚酰亚胺
    • US5470943A
    • 1995-11-28
    • US360584
    • 1994-12-21
    • Yoshihiro SakataWataru YamashitaYuichi OkawaShoji TamaiTsutomu IshidaMitsunori MatsuoKeizaburo YamaguchiAkihiro Yamaguchi
    • Yoshihiro SakataWataru YamashitaYuichi OkawaShoji TamaiTsutomu IshidaMitsunori MatsuoKeizaburo YamaguchiAkihiro Yamaguchi
    • C08G73/10C08G77/10C07D213/69C08G69/26
    • C08G73/1039C08G73/1085
    • This invention relates to a novel fluorine-containing polyimide or polyimide copolymer being colorless and having transparency and very low dielectric characteristics, and has a novel aromatic diamino compound used for the polyimide, a preparation process thereof, a polyimide-based resin composition comprising the polyimide or polyimide copolymer and a fibrous reinforcement, a process for preparing the resin composition, an injection molded article of the resin composition.The polyimide comprise a requisite structural unit having one or more recurring structural units of the formula: ##STR1## wherein Ar is a tetravalent radical having 6 to 27 carbon atoms and being selected from the group consisting of a monoaromatic radical, condensed polyaromatic radical and noncondensed polyaromatic radical having aromatic radicals connected to each other with a direct bond or a bridge member, a trifluoromethyl radical is situated at the 3- or the 4-position on a pyridine nucleus, and an imide nitrogen atom is connected at the 3- or the 4-position to an ether bond.The polyimide or polyimide copolymer has excellent heat resistance, outstanding melt-flow stability and greatly improved processability, and also is colorless and has high transparency and very low dielectric coefficient, and can be expected to be used as raw materials for electric.cndot.electronic appliances and optical instruments due to the above characteristics.
    • 本发明涉及一种新颖的含氟聚酰亚胺或聚酰亚胺共聚物,其具有透明性和非常低的介电特性,并且具有用于聚酰亚胺的新型芳族二氨基化合物及其制备方法,该聚酰亚胺系树脂组合物含有聚酰亚胺 或聚酰亚胺共聚物和纤维增强剂,树脂组合物的制备方法,树脂组合物的注塑制品。 聚酰亚胺包含具有一个或多个下式的重复结构单元的必需结构单元:其中Ar是具有6至27个碳原子的四价基团,并且选自单芳族基团,缩合多芳族基团 具有芳族基团的自由基和非缩合多芳族基团彼此直接键合或桥接成员,三氟甲基位于吡啶核上的3-或4-位,酰亚胺氮原子连接在3 - 或4-位到醚键。 聚酰亚胺或聚酰亚胺共聚物具有优异的耐热性,优异的熔体流动稳定性和极好的加工性,并且是无色的,具有高透明度和非常低的介电系数,并且可以预期用作电气电子设备的原料 光学仪器由于上述特点。