Process for the preparation of polyphenylene oxides with hydroly

Details Process for the preparation of polyphenylene oxides with hydroly Process for the preparation of polyphenylene oxides with hydroly

1975-01-13

1977-06-07

Schain, Howard E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C08G 6544

Patent

active

040283410

ABSTRACT:
An improved process for the preparation of high molecular weight polyphenylene oxides by oxidatively coupling a di-ortho-substituted phenol with an oxygen-containing gas under polymer-forming reaction conditions in a liquid reaction system is provided by using a specific copper-amine complex soluble in the reaction mixture comprising copper ion, bromide ion, a specific class of hindered secondary diamines and a specific group of tertiary monoamines. The process is characterized by a reaction system which (1) results in the formation of higher molecular weight polymer in a given reaction time or polymer of comparable molecular weight in substantially decreased reaction time, (2) permits the use of extremely low copper-to-phenol ratio, and (3) permits the reaction to be carried out in a solvent system where the water of reaction forms a separate phase without the necessity of removing the water phase.

REFERENCES:
patent: 3306874 (1967-02-01), Hay
patent: 3306875 (1967-02-01), Hay
patent: 3838102 (1974-09-01), Bennett et al.
patent: 3900445 (1975-08-01), Cooper et al.

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