Tough soluble aromatic thermoplastic copolyimides

Details Tough soluble aromatic thermoplastic copolyimides Tough soluble aromatic thermoplastic copolyimides

1999-01-22

2000-04-11

Hampton-Hightower, P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528128, 528172, 528173, 528176, 528179, 528183, 528188, 528220, 528229, 528350, C08G 7310

Patent

active

060489596

ABSTRACT:
Tough, soluble, aromatic, thermoplastic copolyimides were prepared by reacting 4,4'-oxydiphthalic anhydride, 3,4,3',4'-biphenyltetracarboxylic dianhydride and 3,4'-oxydianiline. Alternatively, these copolyimides may be prepared by reacting 4,4'-oxydiphthalic anhydride with 3,4,3',4'-biphenyltetracarboxylic dianhydride and 3,4'-oxydiisocyanate. Also, the copolyimide may be prepared by reacting the corresponding tetra acid and ester precursors of 4,4'-oxydiphthalic anhydride and 3,4,3',4'-biphenyltetracarboxylic dianhydride with 3,4'-oxydianiline. These copolyimides were found to be soluble in common amide solvents such as N,N'-dimethyl acetamide, N-methylpyrrolidinone, and dimethylformamide allowing them to be applied as the fully imidized copolymer and to be used to prepare a wide range of articles.

REFERENCES:
patent: 5147966 (1992-09-01), St. Clair et al.
patent: 5171828 (1992-12-01), Meterko et al.
patent: 5502157 (1996-03-01), Chang et al.
patent: 5639850 (1997-06-01), Bryant
patent: 5741883 (1998-04-01), Bryant
patent: 5840828 (1998-11-01), St. Clair et al.

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