Daikin Industries, Ltd.

National Institute of Advanced Industrial Science and Technology

501 Daiken Industries Ltd.

Takuya Arase

Shigeo Daimon

Tetsuo Shimizu

Masayoshi Tatemoto

Yoshiyuki Shibuya

Taketo Kato

Tadashi Ino

Takeshi Inaba

Shigehito Sagisaka

Kenji Ishii

Masaji Komori

Fumihiro Kamiya

Ikuo Kitamura

Shigeru Morita

Masayuki Tsuji

Tadaharu Isaka

Kinji Asaka

Takuji Ishikawa

Tsuyoshi Miyamori

Noriyuki Shinoki

Hideto Nakagawa

Kazuyoshi Ichihara

Masahiro Kondou

Yoshio Negishi

Katsushi Tokunaga

Toshiya Mantani

Yuji Tanaka

Hitoharu Hachisuka

Keizo Desaki

Sadaatsu Yamaguchi

Ikuo Kiatamura

A method for producing a fluoropolymer dispersion where a fine particle containing a fluoropolymer is dispersed in an aqueous dispersion medium, the fluoropolymer having a sulfonic acid group, and the method including a polymerization reaction step of emulsion polymerizing a fluorovinyl ether derivative and a fluorine-containing ethylenic monomer to give a fluoropolymer precursor, a hydrolysis step of hydrolyzing, in an aqueous medium, &#x2014;SOX, where Xrepresents a halogen atom, which the fluoropolymer precursor has thereby to give the fluoropolymer, the fluorovinyl ether derivative being represented by the following general formula (II):CF&#x2550;CF&#x2014;O&#x2014;(CFCFY&#x2014;O)&#x2014;(CFY)-A&#x2003;&#x2003;(II)wherein Y, n, Y, m and Aare as defined herein, the fluoropolymer precursor having a fluorovinyl ether derivative unit content of 5 to 40 mole percent, and the fluoropolymer dispersion being produced without drying the fluoropolymer precursor and the fluoropolymer.

Fluoropolymer dispersion and process for producing fluoropolymer dispersion

An electrode film for a polymer actuator element contains a fluororesin, a fluorine rubber, an ionic liquid, and a conductive filler.

Electrode film for polymer actuator element, and polymer actuator element comprising the same

A fluoropolymer liquid composition including a fluoropolymer liquid (A) which includes a liquid medium and a crosslinkable functional group-containing crosslinkable fluoropolymer. The fluoropolymer liquid (A) is a fluoropolymer liquid dispersion (AD) having, dispersed in a liquid dispersion medium, particles of a crosslinkable fluoropolymer (PD) containing acid/acid salt groups or organic groups capable of undergoing hydrolysis and thus being converted to carboxyl groups, or a fluoropolymer solution (AS) having, dissolved in a fluorosolvent or an alcohol/water mixed solvent, a crosslinkable fluoropolymer (PS) containing acid/acid salt groups or acid/acid salt groups precursors. Further, the crosslinkable functional group is a cyano group, &#x2014;I or &#x2014;Br.

Liquid fluoropolymer composition and process for producing crosslinked fluorochemical

The present invention provides a process for producing a fluorinated ionomer, comprising copolymerizing, in the presence of a polymerization initiator, (i) a compound represented by Formula (I)(M)OSOCFY(CF)O(CFXCFO)CF&#x2550;CF&#x2003;&#x2003;(I)wherein M is H or a metal with a valence of L (L is 1, 2 or 3), X is F, Cl or CF, Y is halogen, m is 1 to 5, and n is 0 to 5, (ii) tetrafluoroethylene and (iii) at least one third monomer selected from the group consisting of hexafluoropropylene, chlorotrifluoroethylene, vinylidene fluoride, CF&#x2550;CFORf (Rf is Cto Cperfluoroalkyl) and ethylene. The present invention further provides a method for purifying and concentrating a fluorinated ionomer, comprising ultrafiltration or dialysis of a fluorinated ionomer solution or dispersion, and a method for forming a film of the fluorinated ionomer.

Process for producing fluoroionomer, method for purification and concentration of the ionomer, and method of film formation

The present invention relates to a method for producing a fluorocopolymer which comprises a polymerization reaction of a fluorine-containing ethylenic monomer with a fluorovinyl ether derivative represented by the following general formula (I):CF&#x2550;CF&#x2014;O&#x2014;[CFCF(CF)O]&#x2014;(CF)-A&#x2003;&#x2003;(I)(wherein n represents an integer of 0 to 3, m represents an integer of 1 to 5, and A represents &#x2014;SOX or &#x2014;COOY; X represents a halogen atom or &#x2014;NRR; Rand Rare the same or different and each represents a hydrogen atom, an alkali metal, an alkyl group or a sulfonyl-containing group and Y represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms) to give a fluorocopolymer, said fluorine-containing ethylenic monomer being a perhaloethylenic monomer represented by the following general formula (II):CF&#x2550;CF&#x2014;R&#x2003;&#x2003;(II)(wherein Rrepresents a fluorine atom, a chlorine atom, Ror OR; Rrepresents a straight or branched perfluoroalkyl group having 1 to 9 carbon atoms, which may have an ether oxygen atom(s)) and/or a hydrogen-containing fluoroethylenic monomer represented by the following general formula (III):CHX&#x2550;CFX&#x2003;&#x2003;(III)(wherein Xrepresents a hydrogen atom or a fluorine atom and Xrepresents a hydrogen atom, a fluorine atom, a chlorine atom, Ror OR; Rrepresents a straight or branched perfluoroalkyl group having 1 to 9 carbon atoms, which may have an ether oxygen atom(s)), and said polymerization reaction being carried out in a saturated perfluorohydrocarbon while additional feeding of the fluorine-containing ethylenic monomer and fluorovinyl ether derivative being carried out.

Process for producing fluorocopolymer, fluorocopolymer, and molded object

The present invention relates to a method for producing a water-soluble fluorine-containing vinyl ether which comprises subjecting a fluorine-containing 2-alkoxypropionic acid derivative represented by the following general formula (I): (wherein A represents &#x2014;OMor &#x2014;OM, and Mrepresents an alkali metal and Mrepresents an alkaline earth metal; X represents a halogen atom; Yand Yare the same or different and each represents a fluorine atom, a chlorine atom, a perfluoroalkyl group or a fluorochloroalkyl group; n represents an integer of 0 to 3, and n of Ys may be the same or different; m represents an integer of 1 to 5, and m of Ys are the same or different; and Z represents a hydrophilic group) to thermal decomposition at a temperature of not lower than 50&#xb0; C. but lower than 170&#xb0; C. in the presence of a coordinating organic solvent to give a water-soluble fluorine-containing vinyl ether represented by the general formula (II): (wherein Y, Y, Z, n and m are as defined above),

Process for the production of water-soluble fluorine-containing vinyl ethers

A method for producing a regenerated fluororesin, characterized in that it comprises subjecting a used melt-molded fluororesin article to a heat treatment at a temperature of from room temperature to the melting point of the resin; a method for producing a regenerated fluororesin, characterized in that it comprises subjecting a used melt-molded fluororesin article to a supercritical washing treatment at a temperature of from room temperature to the melting point of the resin; and a regenerated fluororesin article containing substantially no impurities which is obtainable by the above method.

Method for producing regenerated fluororesin and regenerated fluororesin article

The present invention is to provide a laminated resin molding comprising a polyamide-based resin composition as an outer layer and being excellent in interlayer adhesion strength, in particular a laminated resin molding comprising a fluorine-containing resin as an inner layer. The present invention is a laminated resin molding which comprises a layer (A) comprising a polyamide-based resin composition and a layer (B) laminated to said layer (A), said layer (B) comprising a fluorine-containing ethylenic polymer having a carbonyl group, and said polyamide-based resin composition having a functional group, in addition to an amide group, selected from the group consisting of hydroxyl group, carboxyl group, ester group and sulfonamide group in a total amount of 0.05 to 80 equivalent percent relative to the amide group.

Layered resin molding and multilayered molded article

A multilayer molding having a polyamide-based resin as an outer layer, the multilayer molding including a fluorine-containing resin as an inner layer, as well as a resin laminate which can form the multilayer molding. The resin laminate has a layer (A) including a polyamide-based resin and a layer (B) including a fluorine-containing ethylenic polymer laminated to the layer (A), the polyamide-based resin having an amine value of 10 to 60 equivalents/10g, and the fluorine-containing ethylenic polymer being a fluorine-containing ethylenic polymer having a carbonyl group.

Laminated resin

Method for curing fluoropolymer

A fluorine-containing adhesive material comprising a fluorine-containing ethylenic polymer having a carbonate group and/or a carboxylic acid halide group at a chain end or a side chain of the polymer, wherein a total of a number of the carbonate groups and/or carboxylic acid halide groups is at less than 150 per 1&times;10 main chain carbon atoms, can directly impart the firm adherability to a substrate such as a metal, a glass or a resin while maintaining excellent properties such as chemical resistance, solvent resistance, weatherability and soil releasability possessed by a fluorine-containing polymer.

Fluorochemical adhesive material and laminate comprising the same

To provide a fluorine-containing resin composition useful as a molding material for parts of electronic and electrical equipment which assures well-balanced enhancement of dielectric property, heat resistance, mold-processability (precise processability) and mechanical properties and the parts of electronic and electrical equipment. The fluorine-containing resin composition for parts of electronic and electrical equipment comprises 70 to 95% by weight of (I) fluorine-containing resin mixture comprising (a) a fluorine-containing resin containing polytetrafluoroethylene not to be fibrillated and (b) a thermoplastic resin other than the fluorine-containing resin and 5 to 30% by weight of (II) a metal compound whisker having a single bond strength of not less than 190 KJ/mol calculated from a dissociation energy of bond between a metal element and oxygen. The parts of electronic and electrical equipment which are obtained from the composition have a dielectric constant of not more than 3.5.

Fluorine-containing resin composition for parts of electronic and electrical equipment and same parts

Novel silicon-containing organic fluoropolymers which are appliable to materials over a wide range and which have excellent antifouling property. The silicon-containing organic fluoropolymer of the invention is represented by the general formula and has a number average molecular weight of from 5&times;10,to 1&times;10,:

Silicon-containing organic fluoropolymers and use of the same

The present invention provides acicular fine particles made up of iron and carbon, and these acicular metal iron fine particles can be prepared by contacting acicular iron carbide fine particles with a reducing agent containing no carbon atom. Further, the present invention provides a magnetic coating composition and magnetic recording medium containing the above acicular metal iron fine particles.

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Settsu, Japan

Takuya Arase