Novel oligomers,novel thermally stable polymers and method of their manufacture

摘要: THIS INVENTION CONCERNS NOVEL OLIGOMERS AND THERMALLY STABLE POLYMERS OF THE STRUCTURE PRODUCED FROM SAID POLYAMINES, A METHOD MANUFACTURE THESE OLIGOMERS. HAVE REMARKABLY IMPROVED STABILITY AGAINST HYDROLYSIS ABRASIVE RESISTANCE OVER CONVENTIONALLY KNOWN POLYIMIDE-TYPE POLYMERS, CONCURRENTLY POSSESS EXCELLENT PROPERTIES POLYMERS. OLIGOMER MAY BE EXPRESSED BY FOLLOWING FORMULA III: (-CO-O-CO-)>(R)2-CO-NH-(R1(-X)2)-NH-CO-(R2)<(-CO-O-CO-)