Sughrue Mion, PLLC
Method for producing low molecular weight polytetrafluoroethylene, low molecular weight polytetrafluoroethylene, and powder
The invention provides a production method for producing low molecular weight polytetrafluoroethylene enabling easy removal of most of C8-C14 perfluorocarboxylic acids and salts thereof, which are unfortunately generated by irradiation, from the low molecular weight polytetrafluoroethylene. The method for producing low molecular weight polytetrafluoroethylene includes: (1) irradiating polytetrafluoroethylene to provide low molecular weight polytetrafluoroethylene having a melt viscosity of 1×102 to 7×105 Pa·s at 380° C.; (2) pulverizing the low molecular weight polytetrafluoroethylene; and (3) heating the low molecular weight polytetrafluoroethylene pulverized in the step (2).
DAIKIN INDUSTRIES, LTD.
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Hirotoshi Taku Masamichi Keisuke Kazutaka Taketo Masayuki Kazuya Yuuji Ken
Yoshida Yamanaka Sukegawa Hagi Hosokawa Kato Tsuji Kawahara Tanaka Yoshida