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:
May. 13, 2014
Filed:
Jan. 20, 2009
Yuzo Komatsu, Settsu, JP;
Haruhiko Mohri, Settsu, JP;
Hirokazu Aoyama, Settsu, JP;
Takanori Fukushima, Tokyo, JP;
Takuzo Aida, Tokyo, JP;
Yuzo Komatsu, Settsu, JP;
Haruhiko Mohri, Settsu, JP;
Hirokazu Aoyama, Settsu, JP;
Takanori Fukushima, Tokyo, JP;
Takuzo Aida, Tokyo, JP;
The University of Tokyo, Tokyo, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
The present invention provides a preparation process for converting to a vinylidene fluoride elastomer having a group having sulfinic acid, sulfinic acid derivative, sulfonic acid or sulfonic acid derivative at one end or both ends of its trunk chain, and the preparation process provides a vinylidene fluoride elastomer having, at one end or both ends of its trunk chain, end groups represented by the formula: —CRR—CRR—SOH, wherein Rto Rmay be the same or different and each is hydrogen atom or fluorine atom, by allowing a vinylidene fluoride elastomer having, at one end or both ends of its trunk chain, end groups represented by the formula: —CRR—CRR—X, wherein Rto Rare as defined above, Xis bromine atom or iodine atom, to react with a sulfur compound represented by the formula: (M)HSO, wherein Mis a monovalent or divalent metal ion or ammonium ion, n is an integer of 0 to 2.