Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1986-06-05
1988-07-26
Jacobs, Lewis T.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
427216, 427221, 428404, 428406, 428407, 524205, B32B 2734, B32B 2720, B05D 700
Patent
active
047599871
ABSTRACT:
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.
REFERENCES:
patent: 4640944 (1987-02-01), Brooks
Mizobe Keizo
Noda Yuzuru
Suzuki Koji
Yoshikai Osamu
Jacobs Lewis T.
Nitto Electric Industrial Co. Ltd.
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