Polyimid-Copolymere

摘要

Polyimide copolymers of this invention have a repeating unit of the general formula (1) wherein Ar1 is a tetravalent organic radical containing at least one aromatic ring, R1 is a divalent organic radical, R2 and R3 are monovalent hydrocarbon radicals, and n is an integer from 0 to 4 and a repeating unit of the general formula (2) wherein Ar2 is a tetravalent organic radical containing at least one aromatic ring, R6 is a divalent organic radical, R7 is a monovalent hydrocarbon radical with 1 to 6 carbon atoms, and l is an integer from 5 to 50 and are capable of forming films of a microdomain structure useful for such applications as protective films on semiconductors, coatings, adhesives, moldings, films, and separation membranes.