Invention Grant
- Patent Title: Method for producing liquid-crystalline polyester
- Patent Title (中): 液晶聚酯的制造方法
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Application No.: US13556871Application Date: 2012-07-24
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Publication No.: US08501897B2Publication Date: 2013-08-06
- Inventor: Tomoya Hosoda , Eiji Hosoda , Masanobu Matsubara
- Applicant: Tomoya Hosoda , Eiji Hosoda , Masanobu Matsubara
- Applicant Address: JP Tokyo
- Assignee: Sumitomo Chemical Co., Ltd.
- Current Assignee: Sumitomo Chemical Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Foley & Lardner LLP
- Priority: JP2011-165187 20110728
- Main IPC: C08G63/02
- IPC: C08G63/02 ; C08G64/00

Abstract:
The present invention provides a method for producing a liquid-crystalline polyester, which comprises melt-polymerizing monomers in a reactor having a draw outlet to obtain a polymer melt and drawing the polymer melt through the draw outlet, characterized in that the monomers comprise a compound selected from an aromatic hydroxycarboxylic acid and derivatives thereof, a compound selected from an aromatic dicarboxylic acid and derivatives thereof and a compound selected from an aromatic diol, an aromatic hydroxyamine, an aromatic diamine and derivatives thereof; the amount of units derived from a compound containing a 1,2-phenylene and/or a 1,3-phenylene skeleton(s) in the polyester is from 0 to 10 mol %; the melt polymerization is performed in the presence of a heterocyclic compound containing two or more nitrogen atoms; and the polymer melt has a flow initiation temperature of from 220 to 250° C.
Public/Granted literature
- US20130030141A1 METHOD FOR PRODUCING LIQUID-CRYSTALLINE POLYESTER Public/Granted day:2013-01-31
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