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:
Jul. 28, 2009
Filed:
Dec. 22, 2004
Masao Otsuka, Settsu, JP;
Satoshi Tokuno, Settsu, JP;
Katsuya Nakai, Settsu, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
The present invention relates to a process for preparing a fluoropolymer containing at least one kind of fluoroolefin, which comprises carrying out polymerization in the presence of a surfactant represented by the formula (1): (wherein Rand Rmay be the same or different respectively, and represent an alkyl group or an alkenyl group, Ris a hydrogen atom, an alkyl group or an alkenyl group, the total carbon number of Rto Ris 2 to 25, Lis a group represented by —SO, —OSO, —PO, —OPOor —COO, and Mis a monovalent cation). Thereby, polymerization can be carried out with excellent production efficiency in the presence of a small amount of a surfactant, and a fluoropolymer can be prepared without lowering various physical properties such as water resistance by the surfactant.