| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an aromatic polycarbonate copolymer having precision transfer ability, a low water absorbency, and a low photoelasticity; and an optical disk substrate. <P>SOLUTION: The aromatic polycarbonate copolymer substantially consists of (A) a specified fluorene-derived dihydric phenol and (B) a dihydric phenol represented by formula [2], provided that (A):(B)=10:90 to 80:20 (molar ratio). <P>COPYRIGHT: (C)2005,JPO&NCIPI |
