Daikin Industries, Ltd.

Osaka University

Atomis Inc.

Akinari Sugiyama

Takashi Shibanuma

Nobuhiko Tsuda

Daisuke Karube

Kazuhiro Furusho

Takashi Nomura

Takehiro Chaki

Fumihiko Yamaguchi

Hisashi Mitsuhashi

Atsushi Suzuki

Tatsuya Ohtsuka

Masatoshi Nose

Kazuyoshi Ichihara

Toshiya Mantani

Kentarou Hiraga

Tomohiro Yoshida

Takashi Kanemura

Dai Kataoka

Tetsuhiro Kodani

Akira Harada

Yoshinori Takashima

Yoshihiro Yamamoto

Yoshichika Kuroki

Noriyuki Shinoki

Kaori Ozawa

Hiroyasu Yamaguchi

Michiru Kagawa

Masahiro Kondou

Takamune Okui

Masaki Nakahata

Ryohei Ikura

Hikaru Aramoto

Suguru Nomimura

Saori Sakami

Shinya Bitou

Shingo Okuno

Shouta Shibutani

Shinsuke Ohshita

Kazuhisa Iwaso

Daisuke Asari

Kenji Sumida

An object is to provide a piezoelectric film with good piezoelectricity. This object can be achieved by a piezoelectric film comprising a vinylidene fluoride/tetrafluoroethylene copolymer film and having a residual polarization amount of 40 mC/mor more.

Piezoelectric film having a vinylidenefluoride/tetrafluoroethylene copolymer film

A fluoropolyether-containing compound of the following formula (1a): R—R—R—R(1a) wherein the symbols are as defined in the specification. Also disclosed is a fluoropolyether-containing compound of the following formula (1b): R—R—R—R(1b), as well as a method for producing a compound of the formula (A): FOC—R—R—COOR(A) wherein the symbols are as defined in the specification.

Fluoropolyether group containing compound and method for producing the same

An object of the present invention is to provide a macromolecular material that exhibits excellent elongation. The first macromolecular material of the present invention contains the first polymer containing the first structural unit and the second polymer containing the second structural unit. The first structural unit has a guest group in its side chain, and the second structural unit has a host group in its side chain. At least one of the first and the second polymers contains at least one fluorine group. The second macromolecular material of the present invention contains the first structural unit having a guest group in its side chain, the second structural unit having a host group in its side chain, and the third structural unit other than the first and second structural units. At least one of the first, the second, and the third structural units contains at least one fluorine group.

Polymer material

A perfluoro(poly)ether group containing silane compound represented by the formula (1a) or the formula (1b):A-Rf&#x2014;X&#x2014;SiQY&#x2003;&#x2003;(1a)YQSi&#x2014;X&#x2014;Rf&#x2014;X&#x2014;SiQY&#x2003;&#x2003;(1b)as defined herein. Also disclosed is a process for producing the compound, a surface-treating agent containing the compound, a pellet containing the surface-treating agent and an optical member including a base material and a layer formed on a surface of the base material from the compound.

Silane compound containing perfluoro (poly)ether group

Silane compound containing perfluoro(poly)ether group

A surface-treating composition including a fluorine-containing polymer which is able to form a layer having both high surface slip property and high friction durability. The surface-treating composition includes a first compound (a reactive fluorine-containing polymer which is a fluorine-containing silane polymer) and a second compound (a non-reactive fluorine-containing polymer which is a fluorine-containing oil), and the proportion of the first compound is 15 to 70% by mass with respect to the total mass of the first compound and the second compound.

Surface treatment composition and article obtained using same

The invention provides a compound which is useful in production of a fluoropolymer and easy to be removed from the produced fluoropolymer, a method of producing the compound, and a method of producing a fluoropolymer using the compound. The invention provides a compound which is represented by Rf&#x2014;CHO&#x2014;CF&#x2014;CHF&#x2014;Rf&#x2014;X, wherein Rfrepresents a fluoroalkyl group containing 1 to 5 carbon atoms, Rfrepresents a fluoroalkylene group containing 1 to 3 carbon atoms, X represents &#x2014;COOM or &#x2014;SOM, and M represents one of H, K, Na, and NH.

Compound, method for producing the same and method for producing fluoropolymer

The present invention provides a process for preparing a fluorine-containing propene represented by the chemical formula CFCF&#x2550;CXX, wherein Xis a hydrogen atom or chlorine atom, and Xis a fluorine atom, chlorine atom, or hydrogen atom, by reacting a halogenated propene represented by the chemical formula CCIYZCF&#x2550;CXX, wherein Xand Xare the same as above, and Y and Z may be the same or different and individually indicate a fluorine atom or chlorine atom, with anhydrous hydrogen fluoride in a gas phase in the presence of a chromium oxide or a fluorinated chromium oxide as a fluorination catalyst. The process of the present invention provides a fluorine-containing propene represented by the chemical formula CFCF&#x2550;CClX, wherein X is Cl, H or F, under relatively mild conditions at a high yield.

Process for preparing fluorine-containing propene by gas-phase fluorination

The present invention provides a process for producing 2,3,3,3-tetrafluoropropene represented by the formula CFCF&#x2550;CH, comprising contacting a fluorine-containing propane represented by the formula CFXCFYCHZ, wherein X is Cl, Br, or I; one of Y and Z is H, and the other is F, Cl, Br, or I, with at least one catalyst selected from the group consisting of chromium oxides, fluorinated chromium oxides, and iron fluorides in a gas phase. According to the process of the invention, 2,3,3,3-tetrafluoropropene can be easily produced under economically advantageous conditions.

Process for preparing 2,3,3,3-tetrafluoropropene

The present invention provides a method for producing an olefin represented by General Formula (II): RfCF&#x2550;CH(II) (wherein Rf is defined as below), wherein the method includes the step of contacting a fluorohalide represented by General Formula (I): RfCFCHX (I) (wherein Rf is H(CF)(n=1 to 8) or F(CF)(n=1 to 8), and X is Br or I) with a metal in a reaction medium of a polar organic solvent, or a mixed solvent of water and a polar organic solvent to conduct a dehalogenation reaction. The production method of the present invention provides olefins in a highly selective manner at a low cost and high yield under relatively mild reaction conditions.

Method for producing olefin

The present invention provides a process for producing 1,1,1,3,3,3-hexafluoro-2-methoxypropane, wherein a novel compound, 2-methoxy-2-trifluoromethyl-3,3,3-trifluoropropionic acid or a salt thereof is decarboxylated, or wherein an olefin compound represented by chemical formula (4): CF&#x2550;C(CF)(OCH) is reacted with a fluorinating agent; and a process for producing 2-methoxy-2-trifluoromethyl-3,3,3-trifluoropropionic acid or a salt thereof by reacting a hydroxycarboxylic ester with a methylating agent and then hydrolyzing the reaction product, or hydrolyzing the hydroxycarboxylic ester and then reacting the resulting product with a methylating agent. In accordance with the invention, 1,1,1,3,3,3-hexafluoro-2-methoxypropane, which is useful as a raw material for, for example, the anesthetic Sevoflurane, can be produced efficiently and at low cost.

Carboxylic acid compound, use thereof, and process for producing the same

The present invention provides a method for producing a fluorine-containing halide, comprising reacting a fluorine-containing sulfonyl halide or fluorine-containing disulfonyl chloride with a metal halide or metal component in the present or absence of a solvent. In accordance with the present invention, a fluorine-containing bromide, fluorine-containing iodide or fluorine-containing chloride can be readily produced in high yield at low cost, using an industrially advantageous process.

Method for producing fluorine-containing halide

The present invention provides a process for producing a fluorinated fluorosulfonylalkyl vinyl ether represented by general formula (2):CF&#x2550;CFO(CFCF(CF)O)CFCFSOF&#x2003;&#x2003;(2)wherein n is an integer from 0 to 10, comprising fluorinating a perfluorovinylether sulfonate with SFand HF, the perfluorovinylether sulfonate being represented by general formula (1):CF&#x2550;CFO(CFCF(CF)O)CFCFSOM&#x2003;&#x2003;(1)wherein M is Ma or Mb, provided that Ma is an alkali metal and Mb is an alkaline earth metal; and n is as defined above. According to the process of the invention, the fluorinated fluorosulfonylalkyl vinyl ether can be produced in high yield in an industrially advantageous manner.

Process for producing fluorinated fluorosulfonylalkyl vinyl ether

A method of producing (RCO)O by reacting RCOCl with MCOcan efficiently synthesize a fluorocarboxylic anhydride in a one-step reaction, wherein Ris a saturated hydrocarbon group having 1 to 20 carbon atoms, which optionally has an oxygen atom, in which all or part of hydrogen atoms are substituted with a fluorine atom, or a fluorine atom and another halogen atom, M is an alkali metal or an alkali earth metal, m is 2 when M is the alkali metal, or 1 when M is the alkali earth metal.

Process for producing fluorocarboxylic anhydride

Growing community of inventors

Settsu, Japan

Akinari Sugiyama