Aromatic polyamide, optical anisotropic dope and articles and pr

Details Aromatic polyamide, optical anisotropic dope and articles and pr Aromatic polyamide, optical anisotropic dope and articles and pr

1995-08-31

1998-03-17

Hampton-Hightower, P.

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

Synthetic resins

From carboxylic acid or derivative thereof

528322, 528331, 528335, 528347, 528348, 524165, 524205, 524233, 524600, 524606, C08G 6908, C08G 7310

Patent

active

057287996

ABSTRACT:
The present invention is directed to an aromatic polyamide of formula (I), ##STR1## an optical anisotropic dope containing the aromatic polyamide and a process of making the optical anisotropic dope which does not require sulfuric acid. R is an unsubstituted aromatic group or an aromatic group having at least one nitrile group substituted on the aromatic nucleus, with the proviso that at least 25 mol % of R in the aromatic polyamide is an aromatic group having at least one nitrile group substituted on the aromatic nucleus; R' is phenyl, naphthyl or diphenyl, which is unsubstituted or substituted with Cl, Br, I, NO.sub.2, an alkyl group having one to four carbon atoms or an alkoxy group having one to four carbon atoms; and n is an integer between 10 and 100,000.

REFERENCES:
patent: 3671541 (1972-06-01), Kwolek
patent: 3673143 (1972-06-01), Bair et al.
patent: 4018735 (1977-04-01), Nakagawa et al.

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