Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1992-05-08
1993-11-02
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528185, 528190, 528195, 528298, 548110, 556419, C08G 6300, C08G 6942, C07D23100, C07F 704
Patent
active
RE0344311
ABSTRACT:
Macrocyclic oligomers, including polycarbonates, polyesters, polyamides, polyimides, polyetherketones and polyethersulfones, are conveniently prepared from various spiro(bis)indane compounds, especially the 6,6'-difunctional 3,3',3'-tetramethylspiro(bis)indanes. The macrocyclic oligomers may be conveniently converted to linear polymers.
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Boden Eugene P.
Brunelle Daniel J.
Cella James A.
Colley Alice M.
Evans Thomas L.
General Electric Company
Hampton-Hightower P.
Kight III John
Pittman William H.
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