Process for preparing hydrogen-containing fluoropolymers by suspension (co)polymerization
AssigneeAusimont S.p.A.
InventorsJulio A. Abusleme, Pier Antonio Guarda, Ralph De Pasquale
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Abstract
Process for preparing hydrogen-containing fluoropolymers, wherein the corresponding olefinic monomers are (co) polymerized in an organic suspending medium in the presence of a radical photoinitiator and of ultraviolet-visible radiation at a temperature of from -60.degree. C. to +30.degree. C. Hydrogen-containing fluoropolymers are thus obtained having high second melting temperature and high maximum operating temperature, using as initiators non-hazardous products, which can be easily handled and kept also at room temperature.
Claims9
A process for preparing hydrogen-containing fluoropolymers, said process consisting essentially of (co)polymerizing hydrogen-containing olefinic monomers or a combination of hydrogen-containing and non-hydrogen containing olefinic monomers in an organic suspending medium in the presence of (a) a radical photoinitiator selected from the group consisting of dialkylperoxides, ketones, diacylperoxides, di or polyketones, peroxydicarbonates, peroxyesters, and halogenated or polyhalogenated organic compounds wherein the halogens are selected from the group consisting of F, Cl and Br, and (b) ultraviolet (UV)-visible radiation at a temperature of from -60.degree. to +30.degree. C., with the proviso that said olefinic monomers do not have any halogens other than fluorine or chlorine.
Dependencies are inferred from the claim text.