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:
Aug. 14, 2018
Filed:
Mar. 12, 2015
Daikin Industries, Ltd., Osaka-shi, Osaka, JP;
Taku Yamanaka, Settsu, JP;
Nobuhiko Tsuda, Settsu, JP;
Masayuki Tsuji, Settsu, JP;
Yasuhiko Sawada, Settsu, JP;
DAIKIN INDUSTRIES, LTD., Osaka, JP;
Abstract
The present invention provides an aqueous dispersion of a low-molecular-weight polytetrafluoroethylene (PTFE), which contains an easily removable surfactant, and has a good dispersion stability. Specifically, the present invention provides an aqueous dispersion of a low-molecular-weight PTFE comprising tetrafluoroethylene (TFE) units, or TFE units and modifying monomer units which are copolymerizable with the TFE units, wherein the aqueous dispersion contains from 70 to 9,000 ppm, based on the aqueous dispersion, of a fluorine-containing compound of the formula (1) below:X—(CF)—Y  (1)where X is H or F; m is an integer from 3 to 5; and Y is —SOM, —SOM, —SOR, —SOR, —COOM, —POMor —POM, M being H, NHor an alkali metal, and R being an alkyl group having 1 to 12 carbons, and the low-molecular-weight PTFE has an average primary particle size of from 100 to 350 nm.