Fluoroalkyleneether difunctional compounds

Details Fluoroalkyleneether difunctional compounds Fluoroalkyleneether difunctional compounds

1975-09-04

1977-03-08

Brust, Joseph Paul

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 47R, 260453R, 260484P, 260561HL, 2604652, C07C12128

Patent

active

040112551

ABSTRACT:
Omega-carbomethoxyperfluoroalkylene ether iodides are reacted with metallic zinc to yield alpha-omega perfluoroalkyleneether diesters. The diesters are reacted with ammonia to form diamides, the diamides are reacted with phosphorus pentoxide to form dinitriles, and the dinitriles are esterfied with methanol to form diimidate esters. The diimidate esters are particularly useful as monomers in synthesizing perfluoroalkylene ether bibenzoxazole polymers possessing thermooxidative stability and outstanding low temperature viscoelastic properties.

REFERENCES:
patent: 3347901 (1967-10-01), Fritz et al.
patent: 3505411 (1970-04-01), Rice
patent: 3652464 (1972-03-01), Grindahl et al.
patent: 3660315 (1972-05-01), Hill et al.
patent: 3715378 (1973-02-01), Sianesi et al.
patent: 3847978 (1974-11-01), Sianesi et al.

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