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2. 发明授权

US4759987A Polyimide powder and process for producing the same 失效
标题翻译：聚酰亚胺粉及其制造方法
公开(公告)号：US4759987A
公开(公告)日：1988-07-26
申请号：US871216
申请日：1986-06-05
申请人： Keizo Mizobe , Koji Suzuki , Osamu Yoshikai , Yuzuru Noda
发明人： Keizo Mizobe , Koji Suzuki , Osamu Yoshikai , Yuzuru Noda
IPC分类号： C08K3/00 , C08G73/00 , C08G73/10 , C08J3/215 , C08K7/00 , C08L79/08 , B32B27/34 , B05D7/00 , B32B27/20
CPC分类号： C08J3/215 , C08L79/08 , C08J2379/08 , Y10T428/2969 , Y10T428/2993 , Y10T428/2996 , Y10T428/2998
摘要： A polyimide molding powder and a process for producing the same are disclosed, said powder comprising an aggregate of polyimide particles, in which the whole or a large portion of said powder comprises polyimide particles composed of a particulate filler coated with a polyimide resin and/or polyimide particles composed of a fibrous filler coated with a polyimide resin, and said process comprising reacting an aromatic tetracarboxylic acid dianhydride and an aromatic diamino compound in an organic solvent to synthesize a polyimide precursor and imidating the polyimide precursor to precipitate polyimide particles, wherein a particulate filler and/or a fibrous filler dispersed in a prescribed amount of an organic solvent is or are added to the reaction system at any stage before the imidation of the polyimide precursor. The molding powder produces polyimide molded products free from brittleness and excellent in appearance, as well as various performance characteristics due to the improving effects of the filler.
摘要翻译：公开了一种聚酰亚胺模制粉末及其制造方法，所述粉末包含聚酰亚胺颗粒的聚集体，其中所述粉末的全部或大部分包含由涂覆有聚酰亚胺树脂的颗粒填料和/或由涂覆有聚酰亚胺树脂的纤维填料组成的聚酰亚胺颗粒，所述方法包括使芳族四羧酸二酐和芳族二氨基化合物在有机溶剂中反应，合成聚酰亚胺前体并酰亚胺化聚酰亚胺前体以沉淀聚酰亚胺颗粒，其中颗粒在聚酰亚胺前体的酰亚胺化之前的任何阶段向分散体中添加分散在规定量的有机溶剂中的填料和/或纤维状填料。成型粉末由于填充剂的改善效果而产生无脆性和外观优异的聚酰亚胺模塑制品以及各种性能特征。

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