Daikin Industries, Ltd.

Jun Miki

Yoshito Tanaka

Toshiyuki Katsube

Hirokazu Aoyama

Haruhiko Mohri

Yuko Shiotani

Yuuki Matsuda

Kouzou Noda

Tadashi Kanbara

Tatsuya Hirata

Kouji Kubota

Yoshio Funakoshi

Hitoshi Yoshimi

Yoshikage Ohmukai

Yoshirou Funakoshi

The present invention aims to provide a heat-curable composition that is capable of providing a cured product having low vapor permeability, a low linear expansion coefficient, and a low refractive index. The present invention relates to a curable composition including a fluorine-containing polymer having a hydroxyl value of 100 mgKOH/g or higher and a refractive index of 1.42 or lower and an epoxy compound.

Curable composition

The present invention aims to provide a porous polymer membrane that is excellent not only in water permeability and alkali resistance but also in mechanical strength. The porous polymer membrane of the present invention includes a fluoropolymer (A) that includes a vinylidene fluoride unit and a tetrafluoroethylene unit.

Porous polymer film and production method for porous polymer film

A fluoropolymer including a vinylidene fluoride unit, a tetrafluoroethylene unit, and a unit represented by the following formula (1):&#x2014;CHX&#x2014;CX(OR)&#x2014;&#x2003;&#x2003;(1)wherein one of Xand Xis a hydrogen atom, and the other is a fluorine atom; and R is a hydrogen atom or a C-Calkyl group.

Fluoropolymer, production method for fluoropolymer, and porous polymer film

A solid catalyst used in, for example, production of a perfluoroalkyl iodide telomer is effectively and continuously recovered and the recovered catalyst is continuously recycled to the reactor for reuse. A slurry containing a reaction product and the catalyst is drawn from the reaction system, and the catalyst in the drawn slurry is classified by means of a hydrocyclone, whereby a high-concentration slurry whose catalyst concentration is higher than that of the drawn slurry and a low-concentration slurry whose catalyst concentration is lower than that of the drawn slurry are obtained, and the high-concentration slurry is recycled to the reaction system.

Process and unit for production of perfluoroalkyl iodide telomers

The present invention provides a metallic copper catalyst for use in an ethylene addition reaction to polyfluoroalkyl iodides, a process for efficiently producing a polyfluoroalkylethyl iodide using such a metal copper catalyst in an ethylene addition reaction to a polyfluoroalkyl iodide, and a process for efficiently producing a polyfluoroalkylethyl iodide from a polyfluoroalkyl iodide using the same metallic copper catalyst in a telomerization reaction and a subsequent ethylene addition reaction.

Metallic copper catalyst for polyfluoroalkylethyl iodide production and process for producing polyfluoroalkylethyl iodide

A process for preparing a fluorine-containing alcohol compound, the process comprising the step of reacting water with a halogenated fluorine compound in the presence of a catalyst for preparing a fluorine-containing alcohol compound, the catalyst obtained by supporting an ammine complex containing at least one component selected from the group consisting of the elements in Group 1B, Group 2B, Group 6A, Group 7A and Group 8 of the periodic table on at least one complex oxide selected from the group consisting of Si&#x2014;Al complex oxides, Al&#x2014;P complex oxides and Si&#x2014;Al&#x2014;P complex oxides.

Catalyst for preparing fluorine-containing alcohol compound and a process for preparation of fluorine-containing alcohol compound

The present invention provides a process for producing a fluoroalkyl iodide represented by the general formula (II):Rf-CHCHI&#x2003;&#x2003;(II)wherein Rf is a perfluoroalkyl or polyfluoroalkyl group comprising 1 to 20 carbons, the process comprising reacting hydrogen iodide gas with a fluoroalkene in the presence of a catalyst. The present invention also provides a process for producing a fluoroester by reacting the fluoroalkyl iodide with a carboxylate.

Process for producing fluoroalkyl iodide

The present invention relates to a process for continuously producing a perfluoroalkyl iodide represented by the general formula R(CFCF)I, wherein Ris a Cperfluoroalkyl and n is an integer from 1 to 4, the method comprising continuously supplying a perfluoroalkyl iodide as a telogen represented by the general formula RI, wherein Ris as defined above, and tetrafluoroethylene as a taxogen to a tubular reactor packed with a metal catalyst comprising a powdery spherical metal or a sintered metal; and conducting telomerization at a temperature of 60 to 160&#xb0; C. under a pressure of 0.1 to 5 MPa (gauge pressure). According to the present invention, medium-chain perfluoroalkyl iodides can be continuously and efficiently produced with little generation of impurities, such as hydrogen-containing organic compounds and the like.

Method for continuous production of a perfluoroalkyl iodide telomer

A catalyst for preparing a fluorine-containing alcohol compounds, the catalyst is obtained by supporting an ammine complex containing at least one component selected from the group consisting of the elements in Group 1B, Group 2B, Group 6A, Group 7A and Group 8 of the periodic table on at least one complex oxide selected from the group consisting of Si&#x2014;Al complex oxide, Al&#x2014;P complex oxides and Si&#x2014;Al&#x2014;P complex oxides.

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Settsu, Japan

Jun Miki