Process for the production of polyquinazolone-based polymers

Details Process for the production of polyquinazolone-based polymers Process for the production of polyquinazolone-based polymers

1981-06-25

1982-10-12

Nielsen, Earl A.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528180, 528207, 528208, 528223, 528225, 528229, 528313, 528319, 528327, C08G 6940, C08G 6912

Patent

active

043540171

ABSTRACT:
A process for the production of polyquinazolone-based polymers by reacting bisquinazolone with a diamine or a diamine substituted with a carboxylic acid, sulfonic acid or metal salt thereof in the presence of a Lewis acid catalyst or a phosphorus-containing dehydrating agent, where the polymers are useful to produce permselective membranes.

REFERENCES:
patent: 3408326 (1968-10-01), Errede
patent: 3444136 (1969-05-01), Belohlav et al.
patent: 3541054 (1970-11-01), Takekoshi

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