Modified poly(2,6-dimethyl-p-oxyphenylene), a process for its pr

Details Modified poly(2,6-dimethyl-p-oxyphenylene), a process for its pr Modified poly(2,6-dimethyl-p-oxyphenylene), a process for its pr

1990-07-10

1992-12-15

Marquis, Melvyn I.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525390, 525396, C08G 6548

Patent

active

051717948

ABSTRACT:
An amorphous modified poly(2,6-dimethyl-p-oxyphenylene) (PPO) is described with a glass transition temperature (Tg) within the range of 170.degree.-220.degree. C., of which the macromolecules contain units having trialkylsilyl groups bonded to the nucleus and/or to the methyl: ##STR1## together with units having hydroxyethyl groups bonded to the nucleus and/or to the methyl: ##STR2## This modified PPO is prepared by metalating PPO with a metalating agent and reacting the formed metalated PPO with a trialkylsilyl halide and with ehtylene oxide in succession.
The use of the thus modified PPO for the preparation of flat, including asymmetric, membranes useful in gas mixture separation processes is described.

REFERENCES:
patent: 3402144 (1968-09-01), Hay
patent: 4686131 (1987-08-01), Sugio et al.
patent: 5019631 (1991-05-01), Farias et al.

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