| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a novel polyester resin having excellent optical characteristics and improved characteristics such as moldability. <P>SOLUTION: The polyester resin contains a unit expressed by formula (1). In formula (1), ring Z<SP POS="POST">1</SP>represents an aromatic hydrocarbon ring; ring Z<SP POS="POST">2</SP>represents an aromatic or aliphatic hydrocarbon ring; A represents an alkylene group; R<SP POS="POST">1</SP>may be identical or different, representing a hydrocarbon group or the like; R<SP POS="POST">2</SP>represents a cyano group, a halogen atom or an alkyl group; X represents an ether group; R<SP POS="POST">3</SP>represents an alkyl group; m represents an integer of 0 or more; n represents an integer of 0 or more; and k represents an integer of 0 to 4. <P>COPYRIGHT: (C)2012,JPO&INPIT |
