Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1993-04-09
1995-05-02
Acquah, Samuel A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528125, 528128, 528171, 528172, 528173, 528174, 528176, 528183, 528185, 528188, 528220, 528229, 528350, 528352, 526285, C08G 7310, C08G 6926
Patent
active
054120659
ABSTRACT:
Polyimide oligomers are described which comprise the intercondensation product of a monomer mixture comprising (A) at least one aromatic bis(ether anhydride), (B) at least one phenylindane diamine, and (C) at least one end-cap monomer selected from the group consisting of monoanhydrides, acyl halides and amines, wherein each end-cap monomer (C) contains at least one crosslinkable group in the molecule and wherein the phenylindane diamine component (B) is present in the mixture in a stoichiometric excess. The monomers react in a suitable solvent under an inert atmosphere to form polyimide oligomers having a number average molecular weight of from about 1,000 to about 15,000. The polyimide oligomers of the present invention are readily processed to form polyimide matrix resins with high temperature and oxidative stability.
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Amone Michael
Southcott Mark
Acquah Samuel A.
Ciba-Geigy Corporation
Hampton-Hightower P.
Teoli, Jr. William A.
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