Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1995-10-23
1998-03-31
Hampton-Hightower, P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528125, 528128, 528170, 528172, 528173, 528174, 528176, 528183, 528185, 528188, 528220, 528229, 528350, 4284735, C08G 7310
Patent
active
057340080
ABSTRACT:
The polyimide film of this invention is formed from a polyimide, which is prepared by reacting a diamino compound represented by the general formula (1): ##STR1## wherein X represents a hydrocarbon group having 1 to 20 carbon atoms or a sulfur atom; R represents each independently a halogen atom, a hydrocarbon group having 1 to 6 carbon atoms or a halogen-containing hydrocarbon group having 1 to 6 carbon atoms; a represents each independently an integer of 0 to 4;
with a tetracarboxylic dianhydride represented by the general formula (2) ##STR2## wherein Y represents a tetravalent organic group having 2 or more carbon atoms.
The polyimide film obtained can be applied favorably to a flexible printed circuit board without adhesion layer, a protective coating for electronic parts and electric wires, or a heat resistant adhesive.
REFERENCES:
patent: 5084557 (1992-01-01), Murata et al.
Patent Abstracts of Japan, vol. 18, No. 371 (C-1224), 13 Jul. 1994, & JP-A-06 100508 (Sumitomo Chemical Company Limited).
Shibata Mitsuhiro
Shirasaki Mika
Ueda Youichi
Hampton-Hightower P.
Sumitomo Chemical Company Limited
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