Stiff-chain polyheterocycles having improved solubility, a proce

Details Stiff-chain polyheterocycles having improved solubility, a proce Stiff-chain polyheterocycles having improved solubility, a proce

1990-11-26

1992-07-28

Seidleck, James J.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528186, 528337, C08G 7500, C08G 7532

Patent

active

051342197

ABSTRACT:
The substituted polyheterocycles containing recurring structural units corresponding to the formula ##STR1## in which X is an oxygen atom, a sulfur atom or N-H, show good solubility in mixtures of methanesulfonic acid and methylene chloride or trifluoroacetic acid and methylene chloride. They may be used for the production of mixtures with thermoplastic polymers.

REFERENCES:
patent: 4835246 (1989-05-01), Tsai et al.
patent: 4892921 (1990-01-01), Tsai et al.
patent: 4910293 (1990-03-01), Vekita et al.
patent: 5001217 (1991-03-01), Tsai et al.
Abstract CA115(26):280694x.

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