Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1996-02-08
1997-12-02
Seidleck, James J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528125, 528126, 528128, 528171, 528173, 528174, 528179, 528183, 528185, 528220, 528229, 528353, 427 58, 427 69, 427487, 427496, 427497, 427503, 427504, C08G 7310, B05D 500, C08F 246, C08J 300
Patent
active
056937458
ABSTRACT:
The present method provides a method for preparing the PI varnish which has the steps of: 1) preparing a mixed solution of 60-100% by weight aprotic solvent, and 0-40% by weight aromatic solvent; 2) adding into the mixed solution in a mole ratio of 1:9 two aromatic diamines; and 3) further adding in the mixed solution in a mole ratio of 1:5 two aromatic dianhydrides. Such PI has a suitable thermal expansion coefficient and characteristics different form those of the PI currently in use.
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Hsu Wen-Yueh
King Jinn-Shing
Kuo Lee-Ching
Tsai Yu-Tai
Hampton-Hightower P.
Industrial Technology Research Institute
Seidleck James J.
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