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. 17, 2010
Filed:
Jan. 02, 2009
Takuji Ishikawa, Osaka, JP;
Nobuhiko Tsuda, Osaka, JP;
Yoshihiro Yamamoto, Osaka, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
The invention provides a fluoroethercarboxylic acid which is represented by the general formula (I):RfOCHFCFORfCOOM  (I)wherein Rfrepresents a partially or fully fluorinated alkyl group, which may optionally be interrupted with one or more oxygen atoms, Rfrepresents a partially or fully fluorinated alkylene group, which may optionally be interrupted with one or more oxygen atoms, and M represents a monovalent alkali metal, NHor H. The fluoroethercarboxylic acid can be suitably used as a surfactant and is low in bioaccumulation. The invention is also a method of fluoropolymer production and an aqueous fluoropolymer dispersion, using the fluoroethercarboxylic acid as a surfactant.