Invention Grant
- Patent Title: Process for preparing highly polymerized aromatic polycarbonate resin
- Patent Title (中): 高聚合芳族聚碳酸酯树脂的制备方法
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Application No.: US14442911Application Date: 2013-11-15
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Publication No.: US09546249B2Publication Date: 2017-01-17
- Inventor: Yoshinori Isahaya , Atsushi Hirashima , Hidefumi Harada , Maki Ito , Jun-ya Hayakawa , Takehiko Isobe , Taichi Tokutake , Hongyu Liu , Yousuke Shinkai
- Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
- Applicant Address: JP Tokyo
- Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
- Current Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
- Current Assignee Address: JP Tokyo
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JP2012-252797 20121117
- International Application: PCT/JP2013/080846 WO 20131115
- International Announcement: WO2014/077342 WO 20140522
- Main IPC: C08G64/00
- IPC: C08G64/00 ; C08J3/00 ; C08G64/06 ; C08G64/30 ; C08G64/42 ; C08G63/02
Abstract:
The present invention is to provide a process for preparing a highly polymerized aromatic polycarbonate resin, which comprises the steps of a highly polymerizing step for reacting an aromatic polycarbonate prepolymer and an aliphatic diol compound in the presence of a transesterification catalyst to obtain a highly polymerized aromatic polycarbonate resin, a cyclic carbonate removal step for removing at least part of the cyclic carbonate by-produced in the above highly polymerizing step out of the reaction system, and a recycle step of hydrolyzing the cyclic carbonate removed in the cyclic carbonate removal step to obtain an aliphatic diol compound and using the obtained aliphatic diol compound as at least a part of the aliphatic diol compound to be used in the highly polymerizing step.
Public/Granted literature
- US20150267006A1 PROCESS FOR PREPARING HIGHLY POLYMERIZED AROMATIC POLYCARBONATE RESIN Public/Granted day:2015-09-24
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