Oxadiazole polymers

Details Oxadiazole polymers Oxadiazole polymers

1975-11-24

1978-01-03

Schulz, William E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 7841, C08K 536

Patent

active

040666018

ABSTRACT:
The production of a brominated, polyarylene - 1, 3, 4- oxadiazole solution in oleum involves adding bromine to a precursor solution of the polymer, wherein the polymer is capable of further polymerization and the solution has a viscosity below a predetermined minimum value, and then further polymerizing the brominated polymer to an extent which effects an increase in the viscosity to at least the predetermined minimum value.

REFERENCES:
patent: 2512601 (1950-06-01), Bates et al.
patent: 2677677 (1954-05-01), Fisher et al.
patent: 3734893 (1973-05-01), Studinka et al.
patent: 3775382 (1973-11-01), Brydon

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