Patents Assigned to DuPont Mitsui Fluorochemicals Co., Ltd.
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Patent number: 10421846Abstract: The present invention aims to solve the above mentioned problems by providing a new azeotrope-like composition that can be used for a wide range of industrial purposes. The provision of an azeotrope-like composition including 93.0-99.0 weight percent Z-1,1,1,4,4,4-hexafluoro-2-buteine and 0.1-7 weight percent isopropanol.Type: GrantFiled: December 7, 2016Date of Patent: September 24, 2019Assignee: DUPONT-MITSUI FLUOROCHEMICALS CO., LTDInventors: Hideaki Kikuchi, Takanori Matsumoto
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Publication number: 20180346677Abstract: The present invention aims to solve the above mentioned problems by providing a new azeotrope-like composition that can be used for a wide range of industrial purposes. The provision of an azeotrope-like composition including 93.0-99.0 weight percent Z-1,1,1,4,4,4-hexafluoro-2-buteine and 0.1-7 weight percent isopropanol.Type: ApplicationFiled: December 7, 2016Publication date: December 6, 2018Applicant: DUPONT-MITSUI FLUOROCHEMICALS CO. LTDInventors: Hideaki KIKUCHI, Takanori MATSUMOTO
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Publication number: 20180186062Abstract: An object of the present invention is to provide a heat shrink tube excellent in peelability and transparency, and a method for producing the heat shrink tube. The present invention provides a peelable heat shrink tube comprising a composition containing a melt-processable fluororesin and PTFE, the PTFE lacking a heat history of its melting point or higher after polymerization and having a specific gravity, as measured according to ASTM D4894, of 2.20 or less. The content of the PTFE is 0.05 to 3.0 wt % based on the total weight of the melt-processable fluororesin and the PTFE. The present invention also provides a method for producing the tube which comprises melt-extruding the composition at a temperature lower than the melting point of the PTFE.Type: ApplicationFiled: June 15, 2016Publication date: July 5, 2018Applicants: NISSEI ELECTRIC CO., LTD., DUPONT-MITSUI FLUOROCHEMICALS CO., LTD.Inventors: Hideki KIKUCHI, Tetsuto NAKAJIMA, Daisuke TANAKA, Takao NISHIO, Etsuya TAKI, Hoai-Nam PHAM
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Patent number: 9862852Abstract: [Object of this invention] To provide the amorphous fluorine-containing resin composition that has superior film-forming ability, and has a small impact on the global environment due to its very small global warming potential, and can fully satisfy the requirement from the perspective of the environmental protection of the earth; and to provide the article that contains the coating that is formed from the thin films that are made from this amorphous fluorine-containing resin. composition. [Means to solve the problems] The amorphous fluorine-containing resin composition that dissolves the amorphous fluorine-containing resin in alkoxy fluoroalkene. This invention also provides the article that contains the coating that is formed from the thin films that are made from this amorphous fluorine-containing resin composition.Type: GrantFiled: September 26, 2013Date of Patent: January 9, 2018Assignee: DUPONT-MITSUI FLUOROCHEMICALS CO., LTD.Inventors: Masaki Mugisawa, Yuji Mochizuki, Jeong Chang Lee
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Publication number: 20170361548Abstract: Provided is a molded body with a hollow portion comprising tetrafluoroethylene and perfluoro(alkyl vinyl ether) copolymer, which is obtained by heat treating a molded body with a hollow portion obtained by melt molding tetrafluoroethylene and perfluoro(alkyl vinyl ether) copolymer having a melt flow rate of 0.1 to 100 g/10 min when measured with a load of 5 kg and a measurement temperature of 372±0.1° C. in accordance with ASTM D1238. The heat treatment is carried out at a temperature from 130° C. below the melting point of the copolymer to the melting point of the copolymer. The molded body exhibits excellent blister resistance when utilized in contact with harsh chemicals and under harsh operating conditions.Type: ApplicationFiled: December 18, 2015Publication date: December 21, 2017Applicant: Dupont-Mitsui Fluorochemicals Co., Ltd.Inventors: TAKAHIRO NISHIMURA, HITOMI NISHIMURA, CHORONG JEONG
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Publication number: 20140287177Abstract: Provided is a large-size injection molded article which is obtained by injection molding a composition containing a heat-meltable fluoropolymer. Specifically, provided is a large-size injection molded article, which can be molded at a lower injection pressure as compared with a conventional PFA and obtained by molding a composition superior in mold release characteristics from a metal mold. This large-size injection molded article is superior in, particularly, heat resistance and chemical resistance, as well as dimensional accuracy, for a substrate processing apparatus. Provided is an injection molded article, having a projection area in an injection direction of 1100 cm2 or more, obtained by injection molding a composition containing a heat-meltable fluoropolymer. It is a preferable aspect that the composition including a heat-meltable fluoropolymer is a composition containing a melt moldable tetrafluoroethylene/fluoroalkoxytrifluoroethylene copolymer having an MFR over 60 g/10 minutes.Type: ApplicationFiled: July 27, 2012Publication date: September 25, 2014Applicants: NICHIAS CORPORATION, DUPONT-MITSUI FLUOROCHEMICALS CO., LTD.Inventors: Takahide Suda, Takao Nishio, Kenta Yamamoto, Yuto Moritani, Tatsuo Tomizawa, Torao Iida, Takashi Nihongi
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Publication number: 20140063819Abstract: Provided is a reflector for a light-emitting diode which has a small decrease in reflectance in a range from the ultraviolet region to visible region, and has excellent heat resistance, light resistance, and weather resistance, and a housing having this reflector. The reflector for a light-emitting diode is obtained by molding a fluororesin composition containing a filler with an average particle diameter of smaller than 1 ?m, wherein the difference between the maximum value and the minimum value of the reflectance at a wavelength of 240-700 nm is within 25%.Type: ApplicationFiled: May 23, 2012Publication date: March 6, 2014Applicant: DUPONT MITSUI FLUOROCHEMICALS CO LTDInventor: Pham Hoai Nam
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Patent number: 8618203Abstract: The present invention relates to a heat-meltable fluoropolymer composite composition having excellent thermal conductivity, gas and chemical liquid barrier properties and dynamic properties such as storage modulus which comprises a heat-meltable fluoropolymer fine powder and a layered-compound organized by treatment with tetraphenyl phosphonium ions. The present invention also relates to a heat-meltable fluoropolymer composite composition having similar properties to those mentioned above which is obtained by a process (I) in which a heat-meltable fluoropolymer composite composition is obtained by grinding and mixing a heat-meltable fluoropolymer fine powder and a layered-compound and a process (II) in which such heat-meltable fluoropolymer composite composition thus obtained is melted and mixed under shear stress by means of a melt-mixing extruder.Type: GrantFiled: October 16, 2009Date of Patent: December 31, 2013Assignees: Dupont-Mitsui Fluorochemicals Co., Ltd., E.I. Dupont de Nemours & CompanyInventors: Jeong Chang Lee, Noriyuki Suzuki, Shousaku Kondo, Hajime Sato
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Publication number: 20130161873Abstract: A tetrafluoroethylene copolymer composition for injection molding having excellent resistance to chemical permeation and durability, comprised of polytetrafluoroethylene and copolymer of tetrafluoroethylene and perfluoro(alkyl vinyl ether). The composition has a melt flow rate of 12 g/10 min or greater, a flex life of 20,000 cycles or greater, and a nitrogen gas permeability of 0.8×10?10 cm3 (STP).cm/cm2.sec.cm Hg or less.Type: ApplicationFiled: February 13, 2013Publication date: June 27, 2013Applicant: DUPONT-MITSUI FLUOROCHEMICALS CO LTDInventor: DUPONT-MITSUI FLUOROCHEMICALS CO LTD
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Patent number: 8231974Abstract: A fluoropolymer molding method and the resulting molded article are disclosed where the fluoropolymer is composed of fluoropolymer particles each having a multi-layer structure that consists of at least two types of fluoropolymers having different melting points, with at least one inner layer made of a fluoropolymer with a melting point higher than that of the outermost fluoropolymer. The fluoropolymer of the at least one inner layer is molded at a temperature higher than the melting point of the lowest melting point of the fluoropolymers that form the outermost layers of the multi-layer-structure fluoropolymer particles, and lower than the melting point of the fluoropolymer having the highest melting point. The resulting articles have excellent chemical liquid resistance and gas impermeability and low linear expansion coefficient.Type: GrantFiled: March 15, 2012Date of Patent: July 31, 2012Assignee: Dupont Mitsui Fluorochemicals Co LtdInventor: Takao Nishio
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Publication number: 20120171493Abstract: A fluoropolymer molding method and the resulting molded article are disclosed where the fluoropolymer is composed of fluoropolymer particles each having a multi-layer structure that consists of at least two types of fluoropolymers having different melting points, with at least one inner layer made of a fluoropolymer with a melting point higher than that of the outermost fluoropolymer. The fluoropolymer of the at least one inner layer is molded at a temperature higher than the melting point of the lowest melting point of the fluoropolymers that form the outermost layers of the multi-layer-structure fluoropolymer particles, and lower than the melting point of the fluoropolymer having the highest melting point. The resulting articles have excellent chemical liquid resistance and gas impermeability and low linear expansion coefficient.Type: ApplicationFiled: March 15, 2012Publication date: July 5, 2012Applicant: DUPONT-MITSUI FLUOROCHEMICALS CO LTDInventor: Takao Nishio
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Publication number: 20120172530Abstract: A fluoropolymer molding method and the resulting molded article are disclosed where the fluoropolymer is composed of fluoropolymer particles each having a multi-layer structure that consists of at least two types of fluoropolymers having different melting points, with at least one inner layer made of a fluoropolymer with a melting point higher than that of the outermost fluoropolymer. The fluoropolymer of the at least one inner layer is molded at a temperature higher than the melting point of the lowest melting point of the fluoropolymers that form the outermost layers of the multi-layer-structure fluoropolymer particles, and lower than the melting point of the fluoropolymer having the highest melting point. The resulting articles have excellent chemical liquid resistance and gas impermeability and low linear expansion coefficient.Type: ApplicationFiled: March 15, 2012Publication date: July 5, 2012Applicant: DUPONT-MITSUI FLUOROCHEMICALS CO LTDInventor: Takao Nishio
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Patent number: 8158260Abstract: A fluoropolymer molding method and the resulting molded article are disclosed where the fluoropolymer is composed of fluoropolymer particles each having a multi-layer structure that consists of at least two types of fluoropolymers having different melting points, with at least one inner layer made of a fluoropolymer with a melting point higher than that of the outermost fluoropolymer. The fluoropolymer of the at least one inner layer is molded at a temperature higher than the melting point of the lowest melting point of the fluoropolymers that form the outermost layers of the multi-layer-structure fluoropolymer particles, and lower than the melting point of the fluoropolymer having the highest melting point. The resulting articles have excellent chemical liquid resistance and gas impermeability and low linear expansion coefficient.Type: GrantFiled: May 29, 2007Date of Patent: April 17, 2012Assignee: Dupont Mitsui Fluorochemicals Co LtdInventor: Takao Nishio
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Patent number: 7842765Abstract: The present invention provides a vinyl fluoride copolymer comprising: about 40 to about 90 mole % of repeat units derived from vinyl fluoride; and about 10 to about 60 mole % of repeat units derived from monomer selected from the group consisting of (a) and (b) below and mixtures thereof, with the proviso that about 0.1 mole % to 50 mole % of repeat units in the copolymer are derived from monomer selected from (b): (a) monomer selected from the group consisting of, tetrafluoroethylene, trifluoroethylene, chlorotrifluoroethylene and mixtures thereof; and (b) vinyl monomer containing at least one functional group selected from the group consisting of hydroxyls, thiols, carbonyls, carboxylic acids, carboxylic esters, acid anhydrides, sulfonyls, sulfonic acids, sulfonic esters, phosphoric acids, phosphoric esters, boric acids, boric esters, epoxies, isocyanates, thiocyanates, amines, amides, nitriles and halogen selected from bromide and iodide.Type: GrantFiled: December 21, 2007Date of Patent: November 30, 2010Assignees: E. I. du Pont de Nemours and Company, Dupont-Mitsui Fluorochemicals Co LtdInventors: Ronald Earl Uschold, Jian Wang, Masahiro Yamamoto
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Publication number: 20100261809Abstract: The present invention provides a polymer composition wherein inorganic particles are uniformly dispersed at the nano level in the polymer without having said inorganic particles being surface-treated. It further provides a method for manufacturing a polymer composition wherein a co-aggregate which is obtained by uniformly mixing polymer dispersion with an inorganic particle colloidal solution and co-aggregating the polymer primary particles and inorganic particles which are heterogeneous particles, is separated from the solvent and dried so that the inorganic particles are uniformly dispersed at the nano level in the polymer; and the polymer composition which is obtained by said method.Type: ApplicationFiled: June 28, 2010Publication date: October 14, 2010Applicant: DUPONT-MITSUI FLUOROCHEMICALS CO LTDInventors: Pham H. Nam, Jeong Chang Lee
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Patent number: 7811664Abstract: A fluororesin coating film for improved permeation resistance that maintains excellent wear resistance and also products containing such film. The fluororesin coating has at least two layers that are formed on a substrate where at least one of the layers contains filler with a new Mohs hardness of ?7 and a tetrafluoroethylene-perfluoro (alkyl vinyl ether) copolymer and tetrafluoroethylene-perfluoro (alkyl vinyl ether) copolymer layer directly below the layer described above.Type: GrantFiled: April 19, 2006Date of Patent: October 12, 2010Assignees: E. I. du Pont de Nemours and Company, duPont-Mitsui Fluorochemicals Co LtdInventors: Tomohito Sasaki, Matsunori Takada
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Publication number: 20100197861Abstract: A fluoropolymer molding process is provided for molding a mixture of at least two of fluoropolymers having different melting points at a temperature that is at or above the melting point of the fluoropolymer with the lowest melting point and is less than the melting point of the fluoropolymer with the highest melting point, and the resultant fluoropolymer molded product has excellent resistance to chemical and gas permeation and a low coefficient of linear expansion.Type: ApplicationFiled: April 6, 2010Publication date: August 5, 2010Applicant: DUPONT-MITSUI FLUOROCHEMICALS CO LTDInventor: Takao Nishio
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Publication number: 20100068622Abstract: An electrode binder composition comprising at least one metal chelate compound and at least one fluoropolymer. The binder composition used in a battery electrode improves the cohesion of the powdered active electrode material as well as the adhesion strength between the active material layer and the metallic current collector. The invention further relates to battery electrodes containing the binder composition for lithium ion secondary batteries and electric double layer capacitors.Type: ApplicationFiled: November 19, 2009Publication date: March 18, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANY DUPONT-MITSUI FLUOROCHEMICALS CO LTDInventors: Jian Wang, Masahiro Yamamoto, Ronald Earl Uschold
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Patent number: 7659335Abstract: A composition comprising an aqueous dispersion of fluoropolymer particles stabilized with a polyoxyethylene alkyl ether surfactant having a polydispersity index, Mw/Mn, of 1.15 or less, useful in compositions comprising electrode material.Type: GrantFiled: October 11, 2005Date of Patent: February 9, 2010Assignee: Dupont-Mitsui Fluorochemicals Co LtdInventor: Kazuo Konabe
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Publication number: 20100000771Abstract: The present invention is to significantly improve copper-foil adhesion strength (copper-foil peel strength) without roughening or blackening a copper-foil surface, and thereby to provide a copper-clad laminate used favorably in a high frequency range. The copper-clad laminate (101) for a single-sided printed-wiring board is formed by bonding a copper foil (4) onto a surface of an insulating substrate (2) with an LCP/PFA composite film (3) disposed in between. The insulating substrate (2) is made of a fluororesin prepreg 2A. The copper foil (4) is a rolled copper foil, the both surfaces of which are smooth and not roughened or blackened. The insulating substrate (2) and the copper foil (4) are bonded to each other with the composite film (3) disposed in between by firing and pressing them under temperature conditions which are 5° C. to 40° C. higher than the melting point of PFA and lower than the melting point of LCP.Type: ApplicationFiled: September 21, 2006Publication date: January 7, 2010Applicants: Nippon Pillar Packing Co., Ltd., Junkosha Inc., DuPont-Mitsui Fluorochemicals Co., Ltd.Inventors: Koichi Shimauchi, Hirofumi Ito, Jeong Chang Lee