Process for esterifying fluorinated carboxylic acid polymer

Details Process for esterifying fluorinated carboxylic acid polymer Process for esterifying fluorinated carboxylic acid polymer

1981-10-26

1983-11-15

Schofer, Joseph L.

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

Synthetic resins

Ion-exchange polymer or process of preparing

525337, 525353, 525385, 521 28, B01J 4712, B01J 3920, C08F 814

Patent

active

044156790

ABSTRACT:
A process for preparing a fluorinated polymer having carboxylic ester groups from a corresponding polymer having carboxylic acid groups is disclosed, wherein the polymer having carboxylic acid groups is treated with a selected ortho ester, acetal, ketal, borate ester or sulfite ester. The process is useful for assuring that all of the carboxylate groups of a polymer are in the ester form before an extrusion or lamination procedure, both of which are performed with heat and pressure, so as to preclude decarboxylation of free carboxylic acid groups during such procedure.

REFERENCES:
patent: 3991018 (1976-11-01), Strop et al.
patent: 4067825 (1978-01-01), Hradil et al.
patent: 4111859 (1978-09-01), Strop et al.
patent: 4290833 (1981-09-01), Kadija et al.

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