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. 03, 1984
Filed:
Feb. 18, 1981
Applicant:
Inventors:
Assignee:
Daikin Kogyo Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ; C08L / ; C08L / ;
U.S. Cl.
CPC ...
523200 ; 523334 ; 524434 ; 524435 ; 524436 ; 524437 ; 524545 ; 524904 ;
Abstract
A process for preparing filler-containing polytetrafluoroethylene fine powder which comprises mixing together an aqueous dispersion of particles of polytetrafluoroethylene and an aqueous dispersion of particles of a filler adsorbed with polyvalent cation at the surfaces so as to be charged positively in the presence of an anionic surfactant and a water-immiscible organic liquid to coagulate the polytetrafluoroethylene particles and the filler particles in combination and recovering the coagulated particles from the resultant dispersion mixture, said filler particles being per se chargeable negatively in water.