Patent ID: 7785766

Claim:
A silphenylene structure-bearing polymer comprising recurring units of the general formula (1) and having a weight average molecular weight of 3,000 to 500,000, wherein R 1 to R 4 are each independently a monovalent hydrocarbon radical having 1 to 8 carbon atoms, m is an integer of 1 to 100, “a” is a positive number, “b” is 0 or a positive number satisfying 0.5≦a/(a+b)≦1.0, X is a divalent organic radical of the general formula (2): wherein Y is a divalent organic radical selected from the following radicals: n is 0 or 1, R 5 and R 6 are each independently an alkyl or alkoxy radical having 1 to 4 carbon atoms, and k is 0, 1 or 2.