Continuous process for preparing polyphenylene oxides

Details Continuous process for preparing polyphenylene oxides Continuous process for preparing polyphenylene oxides

1984-04-16

1985-03-05

Lee, Lester L.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

526 65, 526 66, 528214, 528215, 528216, 528217, C08G 6544

Patent

active

045032149

ABSTRACT:
A continuous process for preparing polyphenylene ether resins without removing water is described in which only two continuously vigorously stirred reactors are used with the average residence time in the two reactors being correlated to yield resin having an intrinsic viscosity of at least about 0.35 deciliter/gram.

REFERENCES:
patent: 3306874 (1967-02-01), Hay
patent: 3789054 (1974-01-01), Izawa et al.
patent: 4028341 (1977-06-01), Hay

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