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:
Mar. 18, 2008
Filed:
Jul. 23, 2003
Masaki Irie, Settsu, JP;
Satoshi Tokuno, Settsu, JP;
Sadashige Irie, Settsu, JP;
Yosuke Nishimura, Settsu, JP;
Yoshinori Hori, Settsu, JP;
Mitsuru Kishine, Settsu, JP;
Masaki Irie, Settsu, JP;
Satoshi Tokuno, Settsu, JP;
Sadashige Irie, Settsu, JP;
Yosuke Nishimura, Settsu, JP;
Yoshinori Hori, Settsu, JP;
Mitsuru Kishine, Settsu, JP;
Daikin Industries, Ltd., Tokyo, JP;
Abstract
The present invention provides a process for preparing a fluorine-containing polymer having few branched chains and little weight change in high temperatures, which is a new process wherein composition distribution substantially does not occur. The fluorine-containing polymer is prepared by a batch copolymerization process conducted under conditions of reduced temperature of at least 0.95 and reduced pressure of at least 0.80 of the critical constant calculated from critical temperature, critical pressure and composition ratio of each monomer in the gaseous phase of the reaction vessel using the Peng-Robinson formula.