Patent ID: 7144968

Claim:
A silicon-containing polymer comprising the structure represented by formula 1 below as a main structural unit where R 1 represents a monovalent organic group, R 2 represents a direct bond or a divalent organic group, R 3 represents a monovalent organic group or an organosilyl group, any of which groups may be of different types, X represents hydrogen, a monovalent organic group or an organosilyl group, which groups may be of different types, k and l are positive integers, m is 0 or a positive integer and n is a positive integer, and these subscripts satisfy the following relationship 0 < l l + m + n ≦ 0.8 ⁢ ⁢ 0 ≦ m l + m < 0.2 wherein at least some of the X groups are triorganosilyl groups.