Method of producing a polyether copolymer

Details Method of producing a polyether copolymer Method of producing a polyether copolymer

1992-04-30

1993-02-16

Kight, III, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528179, 528180, 528182, 528185, 528191, 528198, 528199, 528200, 524714, 524726, 524727, 524742, 524743, C08G 6366

Patent

active

051872552

ABSTRACT:
A method of producing a polyether copolymer by reacting a dihalogenobenzonitrile, 1,4-bis(4'-halobenzoyl)benzene, with 4,4'-biphenol in an aprotic polar solvent in the presence of an alkali metal compound to produce a polyether copolymer having repeating units represented by the following general formula (I) ##STR1## and the repeating units represented by the following formula (II) ##STR2## The molar ratio of the repeating units represented by the formula (I) based on the total of the repeating units represented by the formula (I) and the repeating units represented by the formula (II) (the molar ratio of (I)/{(I)+(II)}) is from 0.1 to 0.8. The polyether copolymer has a melt viscosity (the viscosity under no shearing stress) of at least 500 poise as measured 400.degree. C.

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