申请人:Mitsui Toatsu Chemicals, Inc.
公开号:US05470943A1
公开(公告)日:1995-11-28
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.
这项发明涉及一种新型的含氟聚酰亚胺或聚酰亚胺共聚物,其为无色并具有透明性和非常低的介电特性,并具有一种用于聚酰亚胺的新型芳香二氨基化合物,其制备过程,包括所述聚酰亚胺或聚酰亚胺共聚物的聚酰亚胺基树脂组合物以及纤维增强材料,准备树脂组合物的过程,以及树脂组合物的注塑成型制品。聚酰亚胺包括一个必要的结构单元,其具有一个或多个重复结构单元,其化学式为:##STR1## 其中Ar是一个四价基团,具有6至27个碳原子,并选自由一个单芳基团、缩合多芳基团和非缩合多芳基团,其芳香基团通过直接键或桥联成员连接在一起,三氟甲基基团位于吡啶核的3-位或4-位,酰亚胺氮原子连接在3-位或4-位到醚键。该聚酰亚胺或聚酰亚胺共聚物具有出色的耐热性,优异的熔流稳定性和极大的改善的加工性,同时也是无色的,具有高透明度和非常低的介电系数,由于上述特性,可望作为电子电器和光学仪器的原材料。