Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1994-03-03
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, 528172, 528173, 528174, 528176, 528183, 528188, 528220, 528229, 528350, 526935, C08G 7310
Patent
active
054120667
ABSTRACT:
Four phenylethynyl amine compounds--3 and 4-aminophenoxy-4'-phenylethynylbenzophenone, and 3 and 4-amino-4'-phenylethynylbenzophenone--were readily prepared and were used to endcap imide oligomers. Phenylethynyl-terminated amide acid oligomers and phenylethynyl-terminated imide oligomers with various molecular weights and compositions were prepared and characterized. These oligomers were cured at 300.degree. C. to 400.degree. C. to provide crosslinked polyimides with excellent solvent resistance, high strength and modulus and good high temperature properties. Adhesive panels, composites, films and moldings from these phenylethynyl terminated imide oligomers gave excellent mechanical performance.
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Bryant Robert G.
Havens Stephen J.
Hergenrother Paul M.
Jensen Brian J.
Acquah Samuel A.
Bryant Joy L.
Hampton-Hightower P.
Helfrich George F.
Ther United States of America as represented by the Administrato
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