发明名称 |
METHOD FOR CONTINUOUS PRODUCTION OF HIGH-MOLECULAR-WEIGHT POLYCARBONATE RESIN |
摘要 |
The present invention provides an improved method for continuously producing a high-molecular-weight polycarbonate resin by carrying out a linking and highly-polymerizing reaction of an aromatic polycarbonate prepolymer with an aliphatic diol compound wherein the retention time of the reaction mixture in the linking and highly-polymerizing reactor is shortened to achieve excellent performance.;The process comprises a process (A) for producing an aromatic polycarbonate prepolymer by polycondensation reaction of an aromatic dihydroxy compound with diester carbonate and a process (B) for conducting linking and highly-polymerizing reaction of the aromatic polycarbonate prepolymer with an aliphatic diol compound in the linking and highly-polymerizing reactor, wherein the aromatic polycarbonate prepolymer produced by the process (A) is fed continuously to the linking and highly-polymerizing reactor, while the aliphatic diol compound is fed continuously thereto under reduced pressure of 10 torr or less to carry out the reaction. |
申请公布号 |
US2014371404(A1) |
申请公布日期 |
2014.12.18 |
申请号 |
US201214368043 |
申请日期 |
2012.12.27 |
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 |
C08G64/30 |
主分类号 |
C08G64/30 |
代理机构 |
|
代理人 |
|
主权项 |
1. A method for a continuous production of a high-molecular-weight polycarbonate resin which comprises
a process (A) of producing an aromatic polycarbonate prepolymer by a polycondensation reaction of an aromatic dihydroxy compound with diester carbonate in a polycondensation reactor and a process (B) of conducting a linking and highly-polymerizing reaction of said aromatic polycarbonate prepolymer produced by said process (A) with an aliphatic diol compound in a linking and highly-polymerizing reactor, wherein said aromatic polycarbonate prepolymer produced by said process (A) is continuously fed into the linking and highly-polymerizing reactor while said aliphatic diol compound is continuously fed into the linking and highly-polymerizing reactor under reduced pressure of 10 torr or less. |
地址 |
Tokyo JP |