Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1994-12-13
1996-04-16
Seidleck, James J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528125, 528128, 528171, 528172, 528173, 528174, 528176, 528183, 528185, 528187, 528188, 528220, 528229, C08G 7310, C08G 6926
Patent
active
055083773
ABSTRACT:
This invention relates to a novel polyimide or polyimide copolymer having excellent heat resistance and greatly improved processability, 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 L is an oxygen atom, carbonyl, isopropylidene or hexafluoroisopropylidene, and X is ##STR2## and 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.
The polyimide or polyimide copolymer is outstanding in melt-flow stability, and has greatly improved processability and excellent heat resistance. Consequently, the polyimide or polyimide copolymer can be applied to structural materials, and electic.cndot.electronic appliances.
REFERENCES:
patent: 3763211 (1973-10-01), Heath et al.
patent: 4797466 (1989-01-01), Oikawa et al.
patent: 4877653 (1989-10-01), Uora et al.
patent: 5087689 (1992-02-01), Ohta et al.
patent: 5101005 (1992-03-01), Uora et al.
patent: 5205894 (1993-04-01), Ohta et al.
patent: 5278276 (1994-01-01), Ohta et al.
Okawa Yuichi
Tamai Shoji
Yamaguchi Akihiro
Yamashita Wataru
Hampton-Hightower P.
Mitsui Toatsu Chemicals Inc.
Seidleck James J.
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