Process for preparing aromatic polyimide fibers

Details Process for preparing aromatic polyimide fibers Process for preparing aromatic polyimide fibers

1993-06-16

1995-01-03

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2642106, 2642108, 528183, 528188, 528351, 528353, D01D 516, D01F 674, D02J 122

Patent

active

053784200

ABSTRACT:
A process for preparing polyimide fibers involves the preparation of a polymer in p-chlorophenol from reactants comprising 2,2'-dimethyl-4,4'-diaminobiphenyl and a tetracarboxylic anhydride. Following its preparation, the polyimide fibers can be spun directly from the reaction mixture. In a preferred embodiment, the dianhydride comprises 3,3',4,4'-biphenyltetracarboxylic dianhydride.

REFERENCES:
patent: 4370290 (1983-01-01), Makino et al.
patent: 4473523 (1984-09-01), Sasaki et al.
patent: 5071997 (1991-12-01), Harris
Translation of Japan 1-260,015 (Published Oct. 17, 1989).
Abstract of Japan 1-33,134 (Published Feb. 3, 1989).
Kaneda, T. et al. "High Strength-High Modulus Polyimide Fibers I. One-Step Synthesis of Spinnable Polyimides." Journal of Applied Polymer Science, vol. 32 (1986), pp. 3133-3149.
Kaneda, T. et al. "High Strength-High Modulus Polyimide Fibers II. Spinning and Properties of Fibers." Journal of Applied Polymer Science, vol. 32 (1986), pp. 3151-3176.

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