Acid interchange polymerization process for producing an aromati

Details Acid interchange polymerization process for producing an aromati Acid interchange polymerization process for producing an aromati

1974-11-27

1976-04-06

Lee, Lester L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 465R, 260 49, C08G 6304, C08G 6310, C08G 6330

Patent

active

039488560

ABSTRACT:
An improved acid interchange polymerization process for the formation of an aromatic polyester is provided. Ester and carboxylic acid functional groups are reacted in the presence of a catalytically effective amount of a catalyst consisting of a mixture of a transition metal salt of a strong inorganic acid and a transition metal salt of an aliphatic carboxylic acid containing up to about 4 carbon atoms. In a preferred embodiment of the process the reactants are at least one aromatic diester and at least one aromatic dicarboxylic acid. Alternatively, the ester and carboxylic acid functional groups required for the acid interchange reaction may be provided upon the same molecule. Halogen or other substituent groups which do not interfere with the acid interchange reaction optionally may be present upon the aromatic rings.

REFERENCES:
patent: 3234167 (1966-02-01), Sweeney
patent: 3317464 (1967-05-01), Conix
patent: 3449295 (1969-06-01), Conix
patent: 3704279 (1972-11-01), Ismail
patent: 3824213 (1974-07-01), Stackmann

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