Multidimensionally crosslinkable rigid-rod benzobisazole polymer

Details Multidimensionally crosslinkable rigid-rod benzobisazole polymer Multidimensionally crosslinkable rigid-rod benzobisazole polymer

1999-01-27

2000-12-05

Truong, Duc

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

Synthetic resins

Nitrogen-containing reactant

528486, 528487, 528502R, 528503, 528183, 528186, 528337, 528339, 528342, C08G 7300

Patent

active

061568740

ABSTRACT:
Rod-like aromatic heterocyclic polymers having repeating units of the formula --(--Q--Ar--).sub.m --(--Q--Ph--).sub.n)-- where Q is ##STR1## X is --O--, --S--, or --NH--; m is 0.05 to 1.0; n is 1.0-m; Ph is 1,4-phenylene; Ar is ##STR2## R.sub.1 and R.sub.2 are the same and are either H or CH.sub.3 ; and R.sub.3 and R.sub.4 are CH.sub.3.

REFERENCES:
patent: 5001217 (1991-03-01), Tsai
patent: 5098988 (1992-03-01), Tsai
patent: 5100434 (1992-03-01), Sweeny
patent: 5128443 (1992-07-01), Arnold
patent: 5200495 (1993-04-01), Arnold
patent: 5633337 (1997-05-01), Tan
Dang et al., ACS Polymer Preprints, vol. 36, No. 1, pp. 455 456 (1995).

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