A resin comprising a structural unit represented by formula (I0):
wherein A1, A2 and A3 each independently represent a C2-C18 divalent hydrocarbon group,
R1, R2, R3 and R4 each independently represent a hydrogen atom or a C1-C6 saturated hydrocarbon group,
X1 and X2 each independently represent *—O—CO—, —O—CO—O— or —O—, and * represents a binding site to A2 or A3.
由式 (I0) 所代表的结构单元组成的
树脂:
其中 A1、A2 和 A3 各自独立地代表一个 C2-C18 二价烃基、
R1、R2、R3 和 R4 各自独立地代表
氢原子或 C1-C6 饱和烃基、
X1和X2各自独立地代表*-O-CO-、-O-CO-O-或-O-,且*代表与A2或A3的结合位点。