Crosslinkable polyamideimide oligomers and a method of preparati

Details Crosslinkable polyamideimide oligomers and a method of preparati Crosslinkable polyamideimide oligomers and a method of preparati

1989-04-28

1992-10-13

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528126, 528128, 528172, 528173, 528183, 528184, 528188, 528220, 528226, 528229, 528335, 528337, C08G 7314, C08G 6926, C08L 7908

Patent

active

051552060

ABSTRACT:
The thermooxidative stability and thermomechanical properties of advanced composites which use high performance resin matrices such as polyimides and high strength carbon fibers may be improved by sizing the carbon fibers with uncapped or capped linear polyamideimides.
The uncapped linear polyamideimides useful as carbon fiber sizings generally contain repeating units having the general formula: ##STR1## wherein R.sub.2 =a trivalent organic radical and generally benzenetriyl;

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