Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1975-05-27
1976-06-08
Rzucidlo, Eugene C.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 174R, 260 296MP, 526173, 526193, 526255, 528492, C08L 2716
Patent
active
039621693
ABSTRACT:
A fluoroelastomer latex which remains useful after being stored for a long period of time and which can be produced by a process employing a relatively brief residence time in the reactor can be prepared by (A) forming an aqueous emulsion of monomers capable of being copolymerized into a fluoroelastomer, said emulsion comprising (1) vinylidene fluoride plus at least one other fluorine-containing monomer, (2) a specified amount of lithium ion, and (3) an inorganic free-radical initiator; (B) subjecting said emulsion to copolymerization to form a fluoroelastomer latex; and (C) adding a creaming agent to the latex; and optionally carrying out creaming of the latex to form a layer of creamed (high solids) latex, followed by isolating the creamed latex.
REFERENCES:
patent: 2955099 (1960-10-01), Mallouk et al.
patent: 3038870 (1962-06-01), Schott
patent: 3190864 (1965-06-01), Shipp et al.
patent: 3438934 (1969-04-01), Rheinhardt
patent: 3554955 (1971-01-01), Hartwimmer et al.
patent: 3694392 (1972-09-01), Werner, Jr.
patent: 3700627 (1972-10-01), Miller
patent: 3830770 (1974-08-01), Ribbans
Arruda Paul Jeffrey
Barber, Jr. Charles Launcelot
E. I. Du Pont de Nemours and Company
Rzucidlo Eugene C.
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