Invention Grant
- Patent Title: Method for producing bischloroformate compound, polycarbonate oligomer having small number of monomers and solution containing bischloroformate compound
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Application No.: US13261106Application Date: 2010-06-25
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Publication No.: US08344092B2Publication Date: 2013-01-01
- Inventor: Takaaki Hikosaka , Hideyuki Miyamoto , Hiroichi Hokari , Chikayuki Chiba , Hitoshi Takemoto
- Applicant: Takaaki Hikosaka , Hideyuki Miyamoto , Hiroichi Hokari , Chikayuki Chiba , Hitoshi Takemoto
- Applicant Address: JP Tokyo
- Assignee: Idemitsu Kosan Co., Ltd.
- Current Assignee: Idemitsu Kosan Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Foley & Lardner LLP
- Priority: JP2009-152988 20090626; JP2009-152989 20090626
- International Application: PCT/JP2010/060893 WO 20100625
- International Announcement: WO2010/150888 WO 20101229
- Main IPC: C08G64/00
- IPC: C08G64/00 ; C08G63/02
Abstract:
A dihydric phenol compound represented by the following formula (2), a phosgene compound, and an aliphatic tertiary amine are mixed together using a hydrophobic organic solvent to produce bischloroformate that is represented by the following formula (1) and has an average number of repeating units (n) of 1.99 or less. In the formulae (1) and (2), Ar is a divalent aromatic group.
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