Method for producing low molecular weight polytetrafluoroethylene

    公开(公告)号:US11542375B2

    公开(公告)日:2023-01-03

    申请号:US16966919

    申请日:2019-02-05

    发明人: Masayuki Tsuji

    摘要: The disclosure provides a method for producing low molecular weight polytetrafluoroethylene containing less C6-C14 perfluorocarboxylic acids or salts thereof. The method for producing low molecular weight polytetrafluoroethylene includes: (1) irradiating high molecular weight polytetrafluoroethylene to provide low molecular weight polytetrafluoroethylene having a melt viscosity of 1.0×102 to 7.0×105 Pa·s at 380° C.; and (2) irradiating the low molecular weight polytetrafluoroethylene to a dose that does not decompose the low molecular weight polytetrafluoroethylene.