Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1997-04-15
1998-08-04
Hampton-Hightower, P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528173, 528188, 528229, 528310, 528312, 528313, 528322, 528324, 528331, 528332, 528337, 528345, 528347, 528353, C08G 7310, C08G 6928, C08G 6926
Patent
active
057895252
ABSTRACT:
A process for making polyimide composition comprising reacting at least one diamine, at least one tetracarboxylic diacid diester, selected phosphoramide and at least one base catalyst to form at least one polyimide compound, said reaction carried out at a temperature from about 20.degree. C. to about 60.degree. C. and wherein the molar ratio of diamine:tetracarboxylic diacid diester:phosphoramide:base catalyst is in the range of 0.8-1.2:1:2.5-4.0:2.5-4.0.
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Blakeney Andrew J.
Hsu Steve L. C.
Naiini Ahmad
Weber William D.
Hampton-Hightower P.
Olin Microelectronic Chemicals, Inc.
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