Method for purifying a polyphenylene ether with amino carboxylic

Details Method for purifying a polyphenylene ether with amino carboxylic Method for purifying a polyphenylene ether with amino carboxylic

1991-11-12

1993-05-25

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

528212, 528214, 528215, 528217, 528492, 528495, 528496, C08G 6530

Patent

active

052141284

ABSTRACT:
A novel method for purifying a polyphenylene ether is disclosed. The method is characterized in that in separating a polyphenylene ether from a reaction product obtained by oxidative polymerization of a 2,6-di-substituted-phenol by means of a precipitation polymerization method in which a polymer is precipitated in the presence of a catalyst comprising a combination of a copper ion, a halide ion and not less than one type of amines and purifying a polyphenylene ether, wherein an amino carboxylic acid derivative is added to the reaction product and then a polymer is washed with a poor solvent for the polyphenylene ether.

REFERENCES:
patent: 3951917 (1976-04-01), Floryan et al.
patent: 4460764 (1984-07-01), Reffert et al.
patent: 4463164 (1984-07-01), Dalton et al.
patent: 4654418 (1987-03-01), Berger et al.

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