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:
Jun. 25, 2013
Filed:
Mar. 11, 2009
Atsushi Funaki, Chiyoda-ku, JP;
Shigeki Kobayashi, Chiyoda-ku, JP;
Hiroki Nagai, Chiyoda-ku, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
The claimed invention relates to a method for producing a melt-moldable tetrafluoroethylene copolymer containing repeating units (a) based on tetrafluoroethylene and repeating units (b) based on another fluoromonomer, wherein the amount of the repeating units (a), based on the total mass of the repeating units (a) and the repeating units (b), is from 97.3 to 99.5 mass %, and the volume flow rate of the copolymer is from 0.1 to 1000 mm/s; the process including radical suspension-polymerization of tetrafluoroethylene and the fluoromonomer in an aqueous medium in the presence of a radical polymerization initiator and at least one chain transfer agent selected from the group consisting of methane, ethane, a hydrochlorocarbon, a hydrofluorocarbon and a hydrochlorofluorocarbon.