Title:
METHOD FOR PRODUCING POLYETHER NITRILE
Document Type and Number:
WIPO Patent Application WO/2023/090101
Kind Code:
A1
Abstract:
Provided is a method for producing polyether nitrile of a high molecular weight at a practical polymerization rate. A method for producing polyether nitrile that polycondenses an aromatic dihydroxy compound composition (I) and a dihalobenzonitrile compound composition (II) in the presence of a basic compound is characterized in that the aromatic dihydroxy compound composition (I) includes an aromatic dihydroxy compound (I-a) and an aromatic monohydroxy compound (I-b) and contains (I-a) within the range of 99.0-99.995 mol% and (I-b) within the range of 1-0.005 mol% relative to the total of (I-a) and (I-b), and the dihalobenzonitrile compound composition (II) includes a dihalobenzonitrile compound (II-a) and a monohalobenzonitrile compound (II-b) and contains (II-a) within the range of 99.0-99.995 mol% and (II-b) within the range of 1-0.005 mol% relative to the total of (II-a) and (II-b).
Inventors:
HASHIKAWA AKIHIRO (JP)
SHIMODA TOMOAKI (JP)
NAKANO YASUHIRO (JP)
SHIMODA TOMOAKI (JP)
NAKANO YASUHIRO (JP)
Application Number:
PCT/JP2022/039962
Publication Date:
May 25, 2023
Filing Date:
October 26, 2022
Export Citation:
Assignee:
HONSHU CHEMICAL IND (JP)
DAIKIN IND LTD (JP)
DAIKIN IND LTD (JP)
International Classes:
C08G65/40
Foreign References:
| JPH11158264A | 1999-06-15 | |||
| JPH08259689A | 1996-10-08 | |||
| JPH0762085A | 1995-03-07 | |||
| JPH0890557A | 1996-04-09 | |||
| CN112625233A | 2021-04-09 | |||
| US4567248A | 1986-01-28 | |||
| JPS63189435A | 1988-08-05 |
Attorney, Agent or Firm:
YAMADA, Yasuyuki et al. (JP)
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