Stable solutions of poly(paraphenylene terephthalamide) acid cru

Details Stable solutions of poly(paraphenylene terephthalamide) acid cru Stable solutions of poly(paraphenylene terephthalamide) acid cru

1988-12-14

1990-05-01

Anderson, Harold D.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524 84, 524173, 524386, 524391, 524589, 524606, 524608, 524742, 524751, 524767, 528348, C08L 7900

Patent

active

049219006

ABSTRACT:
The acidic crumb of poly(paraphenylene terephthalamide) formed from the reaction of terephthaloyl chloride with para-phenylene diamine in an N-alkyl-pyrrolidone with an alkali or alkaline earth metal salt, is dissolved in a defined mixture of a base, a solvent and co-solvent for use in the direct preparation of fibrous products.

REFERENCES:
patent: 2999788 (1961-09-01), Morgan
patent: 3869429 (1975-03-01), Blades
patent: 4016236 (1977-04-01), Nagasawa et al.
patent: 4308374 (1981-12-01), Vollbracht et al.
patent: 4785038 (1988-11-01), Sweeny

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