Process for conversion of oligomers and higher polymers by irradiation with high-energy electrons
AssigneeAkademie der Wissenschaften der Deutschen Demokratischen Republik
InventorsArmin Ferse, Harald Grimm
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Abstract
Processes for the production of products containing fluorine-containing counds of lower molecular weight by irradiation with high-energy electrons of a dispersion of particles of solid polymers of tetrafluoroethylene and similar perfluoroolefins in an oligomer of the same or a different perfluoroolefin which is liquid at the reaction temperature and having a lower average molecular weight than the solid perfluoroolefin polymers while passing an inert or reactive gas therethrough, and an apparatus in which such processes can be performed.
Claims16
A process for the production of a fluorine-containing compound of lower molecular weight from a solid polymer of a perfluoroolefin which comprises irradiating with a beam of high-energy electrons at a temperature of between substantially 120-300.degree. C a dispersion of particles of the said solid perfluoroolefin polymer distributed in a perfluoroolefin polymer which is liquid at the reaction temperature and having a lower average molecular weight than the solid perfluoroolefin polymer while a gas that is inert to or reactive with the perfluoroolefin polymers is passed upwardly therethrough so that reactions occur only in the uppermost portions of the dispersion at and directly below the upper surface thereof, and recovering the fluorine compounds that are thus produced.
Dependencies are inferred from the claim text.