Silicone-containing polyimide resin and silicone-containing polyamic acid

摘要

PROBLEM TO BE SOLVED: To obtain the subject resin exhibiting excellent water repellency, adhesivity, solvent solubility, flexibility and molding processability, and useful for coating agents, films and adhesives, by copolymerizing a specific polyorganosiloxane. ;SOLUTION: This silicone-contg. polyimide resin is composed of (A) 0.1-100 mol.% of structural unit of formula I [Ar¹ is an aromatic ring-bearing organic tetravalent group; R is a monovalent hydrocarbon group free from aliphatic unsaturated bond; X is a ≥2C (alkyleneoxy)alkylene; Y is X or O; (l), (m) and (n) are each 1-10; (p) is 1-80; (a) is 0 or 1] and (B) 99.9-0 mol.% of structural unit of formula II (Ar² is the same as Ar¹; Ar³ is an aromatic ring-bearing organic bivalent group). This polyimide resin is obtained, for example, by copolymerization between the corresponding tetracarboxylic acid dianhydride, a compound of formula III (Z is H or a group of the formula: SiR³) and a compound of the formula: H₂N-Ar⁵-NH₂ (Ar⁵ is the same as Ar³) at specified proportions to form a silicone-contg. polyamic acid which, in turn, is imidated.;COPYRIGHT: (C)1999,JPO