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Title:
PRODUCTION METHOD OF POLYETHER NITRILE
Document Type and Number:
WIPO Patent Application WO/2023/090099
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a method for producing a polyether nitrile that has high heat resistance and excellent mechanical properties and also has a high molecular weight and high flowability. As a means for solving the problem, provided is a method for producing a polyether nitrile, wherein, in producing the polyether nitrile by a polycondensation reaction of an aromatic dihydroxy compound (I) with a dihalobenzonitrile compound (II), the reaction is continued until the region where the polymer reduced viscosity of the para-chlorophenol solution at 40°C decreases, after the polycondensation proceeds and the polymer reduced viscosity is maximized and exceeds 1.

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Inventors:
HASHIKAWA AKIHIRO (JP)
SHIMODA TOMOAKI (JP)
NAKANO YASUHIRO (JP)
Application Number:
PCT/JP2022/039942
Publication Date:
May 25, 2023
Filing Date:
October 26, 2022
Export Citation:
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Assignee:
HONSHU CHEMICAL IND (JP)
DAIKIN IND LTD (JP)
International Classes:
C08G65/40
Foreign References:
JPH0890557A1996-04-09
JPS60147439A1985-08-03
JPS6155120A1986-03-19
JPH11158264A1999-06-15
JPS63189435A1988-08-05
JPH05339364A1993-12-21
JPS61231027A1986-10-15
JPH04345619A1992-12-01
JPH05271678A1993-10-19
CN112625233A2021-04-09
Attorney, Agent or Firm:
YAMADA, Yasuyuki et al. (JP)
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