METHOD FOR PRODUCING POLYETHERNITRILE

WIPO Patent Application WO/2023/090100

A1

The present invention addresses the problem of providing a method for producing polyethernitrile that exhibits a stable melt fluidity, wherein, when polyethernitrile is repetitively produced, fluctuations and reductions in the melt fluidity during molding are suppressed. Provided as a solution is a method for producing polyethernitrile in which polyethernitrile is obtained by a polycondensation reaction between an aromatic dihydroxy compound (I) and a dihalobenzonitrile compound (II) in the presence of a basic compound (III), the method for producing polyethernitrile characteristically comprising: a step (step 1) for feeding a reaction solvent and reaction starting materials comprising the aromatic dihydroxy compound (I), dihalobenzonitrile compound (II), and basic compound (III) into a polycondensation reaction device and carrying out a polycondensation reaction; a step (step 2) for removing the polymer yielded by the polycondensation reaction from the polycondensation reaction device; and a step (step 3) for removing polymer that remains in the polycondensation reaction device, feeding fresh reaction solvent and reaction starting materials into the polycondensation reaction device, and carrying out a new polycondensation reaction.

JP7306449

Laminate for high frequency circuit, flexible printed circuit board, and laminate wound body

HASHIKAWA AKIHIRO (JP)
SHIMODA TOMOAKI (JP)
KANO RYOTO (JP)
NAKANO YASUHIRO (JP)

PCT/JP2022/039948

May 25, 2023

October 26, 2022

Click for automatic bibliography generation  

HONSHU CHEMICAL IND (JP)
DAIKIN IND LTD (JP)

C08G65/40

JPH11158264A	1999-06-15
JPH06184240A	1994-07-05
JPH06206910A	1994-07-26
JP2009242593A	2009-10-22
JPH08259689A	1996-10-08

YAMADA, Yasuyuki et al. (JP)

View/Download PDF      PDF Help

Previous Patent: PRODUCTION METHOD OF POLYETHER NITRILE

Next Patent: METHOD FOR PRODUCING POLYETHER NITRILE