Method of concentrating polyphenylene ether solutions

Details Method of concentrating polyphenylene ether solutions Method of concentrating polyphenylene ether solutions

1986-10-22

1987-09-08

Michl, Paul R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523343, 528501, 528214, C08J 300, C08L 7104

Patent

active

046924825

ABSTRACT:
The invention relates to a two-stage method for concentrating solutions of polyphenylene ethers (5-15 wt. %) in organic solvents, wherein the first stage is operated with recycle and the second stage is operated in a single pass with no recycle side streams, to produce an accurately adjusted final concentration of between 50 and 60 wt. %.

REFERENCES:
patent: 3036057 (1962-05-01), Wallace
patent: 3470070 (1969-08-01), Heckart
patent: 4414341 (1983-11-01), Williams

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