Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1988-10-04
1991-08-27
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528125, 528126, 528128, 528172, 528185, 528352, C08G 802, C08G 6926, C08G 6942, C08G 7310
Patent
active
050434187
ABSTRACT:
A method is provided for stabilizing polyamide acids of pyromellitic dianhydride and pyromellitic dianhydride copolymers utilizing certain silicon nitrogen compounds such as hexamethyldisilazane.
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Rochow Chemistry of the Silicones, Second Edition, John Wiley & Sons, New York, 1951, p. 186.
O'Neil Elbridge A.
Olson Daniel R.
Davis Jr. James C.
Foelak Morton
General Electric Company
Hampton-Hightower P.
Pittman William H.
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