Invention Grant
- Patent Title: 6,6-polyimide copolymers and processes for preparing them
- Patent Title (中): 6,6-聚酰亚胺共聚物及其制备方法
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Application No.: US12665197Application Date: 2007-06-18
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Publication No.: US08349971B2Publication Date: 2013-01-08
- Inventor: Hiroshi Itatani
- Applicant: Hiroshi Itatani
- Applicant Address: JP JP
- Assignee: Solpit Industries, Ltd.,Sojitz Corporation
- Current Assignee: Solpit Industries, Ltd.,Sojitz Corporation
- Current Assignee Address: JP JP
- Agency: The Webb Law Firm
- International Application: PCT/JP2007/062247 WO 20070618
- International Announcement: WO2008/155811 WO 20081224
- Main IPC: C08G73/10
- IPC: C08G73/10
Abstract:
The present invention provides a process for preparing a solvent-soluble polyimide copolymer synthesized from a 6,6-imide segment having an imide oligomer with PMDA at both ends produced by adding 4 molar equivalents of pyromellitic dianhydride (PMDA) and 2 molar equivalents of diaminotoluene (DAT) to an imide oligomer produced by heating 1 molar equivalent of biphenyltetracarboxylic dianhydride (BPDA) and 2 molar equivalents of diaminodiphenyl ether (DADE) at 160-200° C. in the presence of a catalyst in an organic polar solvent.
Public/Granted literature
- US20100273955A1 6,6-Polyimide Copolymers and Processes for Preparing Them Public/Granted day:2010-10-28
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