| abstract |
PROBLEM TO BE SOLVED: To provide an aromatic-aliphatic copolymer polycarbonate having excellent impact resistance and heat resistance, high Abbe number, low photoelastic constant, and excellent color tone. SOLUTION: 2,2-Bi (4-hydroxyphenyl) propane, 1,1-bis (4-hydroxyphenyl) cyclohexane and tricyclo (5.2.1.0) An aromatic-aliphatic copolymer polycarbonate obtained by polycondensation of 2,6 decanedimethanol and carbonic acid diester under heating and melting. |