Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1973-12-06
1976-01-20
Levin, Stanford M.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
2041592, 260 23XA, 260 306R, 260 312R, 260 328AQ, 260 328R, 260 334F, 260 336F, 260 338F, 260 4227, 260 4575A, 260 8072, 260 8076, 260 8077, 260 808, 260 8081, 260900, C08F 232, C08F21426
Patent
active
039337731
ABSTRACT:
Thermoplastic elastomeric copolymers of tetrafluoroethylene and propylene and terpolymers of tetrafluoroethylene, propylene and a cure site monomer are disclosed which have a substantially uniform composition, i.e., a substantially uniform molar ratio of monomeric units and a relatively high molar ratio of tetrafluoroethylene units to propylene units within the range 1.0:0.11 to 1.0:0.54. The combination of high molar ratio of tetrafluoroethylene/propylene units, substantially uniform composition and good elastomeric properties is achieved by using a hybrid batch/continuous process wherein a reactor is initially charged with a mixture of tetrafluoroethylene, propylene and, optionally, a cure site monomer having a TFE/propylene molar ratio substantially higher than that of the polymer to be produced, i.e., in the range 1.0:0.01 to 1.0:0.087. The polymerization reaction is then initiated and a mixture of the same monomers is fed to the reactor at such a rate and in such proportions as to maintain the molar ratio of the unreacted monomers substantially the same as that in the initial charge to the reactor.
REFERENCES:
patent: 2436069 (1948-02-01), Joyce
patent: 2468664 (1949-04-01), Hanford et al.
patent: 2479367 (1949-08-01), Joyce et al.
patent: 3306879 (1967-02-01), Pattison
patent: 3380974 (1968-04-01), Stilmar
patent: 3467635 (1969-09-01), Brasen et al.
patent: 3579474 (1971-05-01), Ro
patent: 3718558 (1973-02-01), Tabata et al.
patent: 3723270 (1973-03-01), Tabata et al.
Journal of Polymer Science, 2, pp. 2235-2243, (1964).
Levin Stanford M.
Thiokol Corporation
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