Polyimide-polyamide polymer having fluorine-containing linking g

Details Polyimide-polyamide polymer having fluorine-containing linking g Polyimide-polyamide polymer having fluorine-containing linking g

1989-05-08

1990-10-09

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528 26, 528 27, 528 28, 528 33, 528125, 528128, 528172, 528188, 528220, 528229, 528337, 528352, 528353, C08G 7314

Patent

active

049621831

ABSTRACT:
The present invention provides novel heat stable polyamide-imide polymers having excellent flow properties and moisture stability which render them more readily processible into fibers, films, sheets and other molded articles. The polymers are prepared by forming the polycondensation product of one or more aromatic diamines, one or more tetrafunctional aromatic dianhydrides, and a difunctional aromatic carboxylic acid or amide-forming derivative thereof containing the groups ##STR1## linking two aromatic moieties, wherein R is CF.sub.3 or phenyl. In addition to improved flow properties, the polyamide-imide polymers of this invention also exhibit improved solubility properties in most organic solvents, improved resistance to attack by chlorinated solvents such as trichloroethylene as compared with polyimides, improved hydrophobic properties as well as excellent thermal properties, including resistance to thermooxidative degradation.

REFERENCES:
patent: 3179635 (1965-04-01), Frost et al.
patent: 4795798 (1989-01-01), Tamai et al.

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