| 摘要 |
PURPOSE:To obtain the title composition being lowly birefractive and improved in optical uniformity, humidity resistance, heat resistance and mechanical strengths by blending a specified aromatic polycarbonate copolymer with a specified PS copolymer. CONSTITUTION:A bisphenol is reacted with dicyclopentadiene dihydrate and phosgene to obtain an aromatic polycarbonate copolymer (a) of formula I (wherein R1-2 are each H, a 1-6C alkyl or a phenyl; m and n are each 0.01-0.99, m+n=1; and A is a group of formula II, III or IV). Separately, styrene is radical-copolymerized with p-(hexafluoro-2-hydroxypropyl)styrene and maleic anhydride to obtain a PS copolymer (b) of formula V (wherein o is 0.01-0.95, and p and q are each 0.01-0.5, and o+p+q=1). Component (a) is blended with component (b) in a weight ratio of (95-30):(5-70). |
