SILICONE-CONTAINING POLYIMIDE RESIN, SILICONE-CONTAINING POLYAMIC ACID AND THEIR PRODUCTION

摘要

PROBLEM TO BE SOLVED: To obtain the subject resin capable of exhibiting excellent heat resistance and flexibility by subjecting an organosiloxane having a specific chemical structure to copolymerization. SOLUTION: This silicone-containing polyimide resin comprises 0.1-100 mol% of structural units expressed by formula I [Ar1 is a tetravalent organic residue having at least one aromatic ring; R is a monovalent hydrocarbon residue not containing any aliphatic unsaturated bond; X is an alkylene having two or more carbon atoms or the like; (m) and (n) are each 0 or 1-3, provided that (m)+(n) is 1-6] and 99.9-0 mol% of structural units of formula II [Ar2 is a tetravalent organic residue having at least one aromatic ring; Ar3 is a divalent organic residue having at least one aromatic ring]. The resin can be obtained by subjecting a silicone-containing polyamic acid comprising 0.1-100 mol% of structural units of formula III (Z is H or the like) and 99.9-0 mol% of structural units of formula IV to thermal cyclodehydration to imidate. Thus the objective resin excellent in both heat resistance and flexibility can be provided.