Preparation of poly-o-hydroxyamides and poly-o-mercaptoamides

Details Preparation of poly-o-hydroxyamides and poly-o-mercaptoamides Preparation of poly-o-hydroxyamides and poly-o-mercaptoamides

1996-08-27

1998-06-02

Truong, Duc

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

Synthetic resins

From carboxylic acid or derivative thereof

528183, 528185, 528 99, 528109, 528112, 528115, 528120, 528171, 528173, 528288, 528293, 528335, 528357, 528481, 528513, 521180, 521182, 521184, C08G 6908, C08G 7310

Patent

active

057601623

ABSTRACT:
In a process for the preparation of poly-o-hydroxyamides and poly-o-mercaptoamides, a bis-o-aminophenol or a bis-o-aminothiophenol is reacted at a temperature of .ltoreq.0.degree. C. with a mixed dianhydride of a dicarboxylic acid and a sulfonic acid with the following structure:

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