Preparation of heterocyclic block copolymer from perfluoroalkyle

Details Preparation of heterocyclic block copolymer from perfluoroalkyle Preparation of heterocyclic block copolymer from perfluoroalkyle

1977-10-17

1979-03-20

Nielsen, Earl A.

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

Synthetic resins

From fluorine-containing reactant

260307G, 528422, C08G 7306

Patent

active

041455240

ABSTRACT:
Diamidoxime monomers having the formula: ##STR1## are intermolecularly and thermally condensed to form a heat and chemical resistant polymer containing 1,2,4-oxadiazole linkages and having the formula: ##STR2## wherein R represents identical bivalent organic radicals or any combination of bivalent organic radicals selected from the group consisting of --(CX.sub.2).sub.p --, wherein p ranges from 2 to 8 when X is fluorine and 2 to 18 when X is hydrogen, chlorine, nitro or aryl; arylene; and an oligometric or polymeric radical prepared by reacting a dicarboxylic acid halide with a fluorinated epoxide and having the formula:

REFERENCES:
patent: 3275608 (1966-09-01), Montgomery et al.
patent: 3484389 (1969-12-01), Iwakura et al.
patent: 3960814 (1976-06-01), Cochoy

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