Copolyimide odpa/bpda/4,4'-oda/p-phenylenediamine

Details Copolyimide odpa/bpda/4,4'-oda/p-phenylenediamine Copolyimide odpa/bpda/4,4'-oda/p-phenylenediamine

C - Chemistry, Metallurgy

08

G

117/196, 400/201

C08G 73/10 (2006.01) B05D 5/12 (2006.01) H01B 3/38 (2006.01) H01B 13/32 (2006.01) H01L 21/60 (2006.01) H01L 23/14 (2006.01)

Patent

CA 2027957

Case 5962/6118 JHE/kmf 10/24/89 ABSTRACT OF THE INVENTION COPOLYMIDE ODPA/BPDA/4,4'-ODA or p-PDA Polyimide copolymers of the following formulas are disclosed: The first is a copolyimide of the recurring structure Image wherein AR may be either AR1 or AR2, wherein AR1 is represented by the following formula: Image and wherein AR2 is represented by the following formula: Image provided that the molar ratio between AR1 and AR2 is in the range from 3:1 to 1:3 and wherein AR3 is selected from the group consisting of Image and Image The second is a block copolyimide in which the following two recurring structures exist as blocks wherein block 1 is Image where AR1 is Image wherein block 2 is Image where AR2 is Image provided that the molar ratio of block 1 to block 2 is in the range of 3:1 to 1:3 and wherein AR3 is selected from the group consisting of Image and Image These polyimides have unexpected properties which are useful in various electronic applications.

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