Method for preparing monomeric and polymeric bis(dicarboxyphenyl

Details Method for preparing monomeric and polymeric bis(dicarboxyphenyl Method for preparing monomeric and polymeric bis(dicarboxyphenyl

1984-06-18

1986-09-02

Lee, Lester L.

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

Synthetic resins

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

525436, 528172, 528352, 528353, 562429, 562432, 568 27, C08G 7310

Patent

active

046097120

ABSTRACT:
Bis(dicarboxyphenyl) sulfone compounds, including the free tetracarboxylic acids and their functional derivatives such as salts, esters, amides, anhydrides and imides, are prepared by oxidizing the corresponding sulfides with a relatively strong oxidizing agent, preferably a peroxy reagent such as acetyl peroxide or m-chloroperbenzoic acid. The reaction is especially useful for the preparation of sulfone polyimides, since films of the sulfide polyimides may be oxidized without dissolving or otherwise degrading their structural integrity.

REFERENCES:
patent: 3022320 (1962-02-01), Bennett et al.
patent: 3529017 (1970-09-01), Izard et al.
patent: 3622525 (1971-11-01), Miller
patent: 3812159 (1974-05-01), Lubowitz
patent: 3878240 (1975-04-01), Kuenzy
patent: 4275240 (1981-06-01), Yamaguchi et al.
patent: 4287366 (1981-09-01), Yamaguchi et al.
patent: 4329496 (1982-05-01), Webb

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