The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 12, 2016
Filed:
Sep. 29, 2011
Applicants:
Masayoshi Miyamoto, Settsu, JP;
Taku Yamanaka, Settsu, JP;
Yasuhiko Sawada, Settsu, JP;
Inventors:
Assignee:
DAIKIN INDUSTRIES, LTD., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 14/26 (2006.01); C08F 2/20 (2006.01); C08F 114/26 (2006.01); C08J 3/16 (2006.01); C08F 214/26 (2006.01);
U.S. Cl.
CPC ...
C08F 14/26 (2013.01); C08F 2/20 (2013.01); C08F 114/26 (2013.01); C08J 3/16 (2013.01); C08F 214/26 (2013.01); C08J 2327/18 (2013.01); Y10T 428/2982 (2015.01);
Abstract
A process for producing a polytetrafluoroethylene fine powder including: (1) a step of preparing an aqueous dispersion containing polytetrafluoroethylene, water and a surfactant (A); (2) a step of initiating coagulation of the polytetrafluoroethylene in said aqueous dispersion by agitating said aqueous dispersion; (3) a step of adding a surfactant (B) after the step (2); (4) a step of terminating coagulation after the step (3); (5) a step of collecting a wet powder of the polytetrafluoroethylene; and (6) a step of drying the wet powder of the polytetrafluoroethylene.