发明名称 |
Process for manufacturing branched aromatic polycarbonate resin with desired degree of branching |
摘要 |
A branched aromatic polycarbonate resin having a degree of branching (N value) controlled within a specific range is manufactured by subjecting an aromatic polycarbonate prepolymer that has a branched structure introduced using a specific amount of a branching agent to molecular-weight-increasing linking reaction with an aliphatic diol compound in the presence of a transesterification catalyst under the condition of a reduced pressure. The amount (A) of the branching agent used is adjusted on the basis of the correlation between the amount (A) of the branching agent used and the N value of the branched aromatic polycarbonate resin. |
申请公布号 |
US8969505(B2) |
申请公布日期 |
2015.03.03 |
申请号 |
US201213984380 |
申请日期 |
2012.02.09 |
申请人 |
Mitsubishi Gas Chemical Company, Inc. |
发明人 |
Isahaya Yoshinori;Hirashima Atsushi;Harada Hidefumi;Ito Maki;Hayakawa Jun-ya;Isobe Takehiko;Tokutake Taichi;Shinkai Yousuke |
分类号 |
C08G64/00;C08G64/42;C08G64/30;C08G64/16;C08G63/02 |
主分类号 |
C08G64/00 |
代理机构 |
Greenblum & Bernstein, P.L.C. |
代理人 |
Greenblum & Bernstein, P.L.C. |
主权项 |
1. A process for manufacturing a branched aromatic polycarbonate resin having a desired degree of branching which comprises a process wherein an aromatic polycarbonate prepolymer having a branched structure introduced by using a predetermined amount of a branching agent is subjected to linking and a highly-polymerizing reaction by melt polymerization under reduced pressure with an aliphatic diol compound having aliphatic hydrocarbon groups bonding to terminal OH groups. |
地址 |
Tokyo JP |