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:
Nov. 28, 2006
Filed:
Sep. 20, 2004
Jun Hoshikawa, Chiba, JP;
Shigeki Kobayashi, Chiba, JP;
Jun Hoshikawa, Chiba, JP;
Shigeki Kobayashi, Chiba, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
To an aqueous PTFE polymer emulsion having a PTFE content of from 10 to 50 mass % obtained by emulsion polymerization of tetrafluoroethylene in the presence of an anionic perfluorocarboxylate surfactant (APFC), from 2 to 20 mass %, based on the mass of PTFE, of a nonionic surfactant having an average molecular weight of from 450 to 800 and an inorganic/organic property ratio of from 1.07 to 1.50 and from 10 to 800 mass %, based on the mass of PTFE, of water are added to obtain an aqueous PTFE dispersion having a PTFE content of from 1 to 40 mass % of PTFE, and then PTFE is concentrated by sedimenting the PTFE and separating a PTFE-rich aqueous dispersion composition from the supernatant. According to the present invention, a PTFE-rich aqueous dispersion composition having a low APFC concentration can be obtained.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile