Polyamide-imide polymers having fluorine-containing linking grou

Details Polyamide-imide polymers having fluorine-containing linking grou Polyamide-imide polymers having fluorine-containing linking grou

1989-02-27

1990-05-08

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528172, 528173, 528179, 528185, 528188, 528189, 528229, 528351, 528352, C08G 6926

Patent

active

049239600

ABSTRACT:
The present invention provides novel heat stable polyamide-imide polymers having excellent flow properties 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 of more aromatic diamines, one or more trifunctional acid anhydride monomers, and one or more tetrafunctional aromatic dianhydrides, at least one of said monomers 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.

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patent: 3829399 (1974-08-01), Hara et al.
patent: 3920612 (1975-11-01), Stephens
patent: 4447574 (1984-05-01), Keske et al.
patent: 4448925 (1984-05-01), Hanson
patent: 4575924 (1986-03-01), Reed et al.

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