Patent ID: 6461738
Filing Date: 2002-10-08
Classification: C08G,C09D,Y10T

Abstract:
A polyimide-based insulating film composition comprising (a) 100 parts by weight of an organic solvent-soluble polyimidosiloxane obtained from a tetracarboxylic acid component and a diamine component comprising 45-90 mole percent of a diaminopolysiloxane represented by the following general formula (1):H2Nâ€”R1â€”[Si(R2)2â€”Oâ€”]n1â€”Si(R2)2â€”R1â€”NH2â€ƒâ€ƒ(1) wherein R1 represents a divalent hydrocarbon group or a phenyl group, R2 each independently represents an alkyl group of 1 to 3 carbon atoms or a phenyl group, and nl represents an integer of 3 to 30, 0.5 to 40 mole percent of a polar group-containing aromatic diamine and 0 to 50 mole percent of an aromatic diamine with plural benzene rings, (b) 2 to 40 parts by weight of a polyvalent isocyanate and (c) an organic solvent.