Patents by Inventor Yoshimichi Okano
Yoshimichi Okano has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20240067777Abstract: The present invention provides a curable compound product that forms a cured product having excellent heat resistance and high insulating properties by performing heat treatment. The curable compound product of the present disclosure contains a compound represented by Formula (1) below, and a proportion of a group represented by Formula (r-1) below to the sum of the group represented by Formula (r-1) below and a group represented by Formula (r-2) below is 97% or greater. In Formula (1), R1 and R2 are identical or different, and each represent the group represented by Formula (r-1) the group represented by Formula (r-2) below: D1 and D2 are identical or different, and each represent a single bond or a linking group. L represents a divalent group having a repeating unit containing a structure represented by Formula (I) below and a structure represented by Formula (II) below.Type: ApplicationFiled: December 25, 2020Publication date: February 29, 2024Applicant: DAICEL CORPORATIONInventors: Feng LIU, Yoshimichi OKANO, Kouji NAKATANI
-
Publication number: 20240026076Abstract: Provided is a curable compound product having excellent storage stability and moldability and by which a cured product having ultra-high heat resistance can be formed. The curable compound product according to the present disclosure has the following characteristics (a) to (g): (a) A number average molecular weight (calibrated with polystyrene standard) is from 1000 to 15000. (b) A proportion of a structure derived from an aromatic ring in a total amount of the curable compound product is 50 wt. % or greater. (c) Solvent solubility at 23° C. is 1 g/100 g or greater. (d) The glass transition temperature is from 80 to 230° C. (e) A viscosity (?0) of a 20 wt. % NMP solution obtained by subjecting the curable compound product to a reduced-pressure drying process and then dissolving the reduced-pressure-dried curable compound product in NMP, and a viscosity (?10) of the 20 wt. % NMP solution after being left to stand for 10 days in a desiccator maintained at 23° C. satisfy the Equation (E): ?10/?0<2(E).Type: ApplicationFiled: October 5, 2021Publication date: January 25, 2024Applicant: DAICEL CORPORATIONInventors: Yoshimichi OKANO, Kouji NAKATANI
-
Publication number: 20230373916Abstract: Provided is a curable compound product having excellent storage stability that is rapidly cured upon heating to form a cured product having ultra-high heat resistance. The curable compound product according to the present disclosure has the following characteristics (a) to (e): (a) A number average molecular weight (calibrated with polystyrene standard) is from 1000 to 15000. (b) A proportion of a structure derived from an aromatic ring in a total amount of the curable compound product is 50 wt. % or greater. (c) Solvent solubility at 23° C. is 1 g/100 g or greater. (d) The glass transition temperature is from 80 to 230° C. (e) A viscosity (?0) of a 20 wt. % NMP solution obtained by subjecting the curable compound product to a reduced-pressure drying process and then dissolving the reduced-pressure-dried curable compound product in NMP, and a viscosity (?10) of the 20 wt. % NMP solution after being left to stand for 10 days in a desiccator maintained at 23° C. satisfy the Equation (E): ?10/?0<2(E).Type: ApplicationFiled: October 5, 2021Publication date: November 23, 2023Applicant: DAICEL CORPORATIONInventors: Yoshimichi OKANO, Takeshi ASADA
-
Patent number: 11021438Abstract: There is provided a curable compound having good solvent solubility and being capable of forming a cured material having super heat resistance. The curable compound according to the present invention is represented by the following formula (1).Type: GrantFiled: November 10, 2017Date of Patent: June 1, 2021Assignee: DAICEL CORPORATIONInventors: Fei Yang, Yoshimichi Okano, Kouji Nakatani, Feng Liu, Michiyo Nakai, Takayuki Yaegashi, Yusuke Okamoto, Tsukasa Yoshida
-
Patent number: 10622658Abstract: A release layer of a release film for producing a membrane electrode assembly of a polymer electrolyte fuel cell comprises a cyclic olefin polymer comprising an olefin unit having a C3-10alkyl group as a side chain thereof. The release layer may have a glass transition temperature of about 210 to 350° C. The release layer may have a transition point of a dynamic storage modulus E? in a range from ?50 to 100° C. An ion exchange layer comprising an ion exchange polymer may be laminated on the release layer of the release film by a roll-to-roll processing to produce a laminate. The release film may be separated from the laminate to give the membrane electrode assembly. The release film achieves improved production of a membrane electrode assembly (an electrolyte membrane and/or an electrode membrane) of a polymer electrolyte fuel cell.Type: GrantFiled: November 4, 2014Date of Patent: April 14, 2020Assignees: DAICEL CORPORATION, DAICEL VALUE COATING LTD.Inventors: Hiroshi Onomichi, Katsuhiko Sumita, Yoshimichi Okano, Kanae Nishimura, Kazuyuki Okada, Takayuki Yaegashi, Ken Suzuki
-
Publication number: 20200079726Abstract: There is provided a curable compound having good solvent solubility and being capable of forming a cured material having super heat resistance. The curable compound according to the present invention is represented by the following formula (1).Type: ApplicationFiled: November 10, 2017Publication date: March 12, 2020Applicant: DAICEL CORPORATIONInventors: Fei YANG, Yoshimichi OKANO, Kouji NAKATANI, Feng LIU, Michiyo NAKAI, Takayuki YAEGASHI, Yusuke OKAMOTO, Tsukasa YOSHIDA
-
Patent number: 10283801Abstract: A polymer film comprises a polymer composition containing (A) a cyclic olefin polymer containing an olefin unit having a C3-10alkyl group as a side chain thereof and (B) a chlorine-containing polymer. The chlorine-containing polymer (B) may comprise a vinylidene chloride-series polymer. The ratio of the chlorine-containing polymer (B) relative to 100 parts by weight of the cyclic olefin polymer (A) may be 0.5 to 60 parts by weight. The film has a moderate releasability from an electrolyte membrane and an electrode membrane of a polymer electrolyte fuel cell and a moderate adhesion to the electrolyte membrane and the electrode membrane and can adhere to a commonly-used substrate film without interposition of an adhesive layer such as an easily adhesive layer. The film is thus suitable as a release film for producing a membrane electrode assembly of a polymer electrolyte fuel cell.Type: GrantFiled: April 30, 2015Date of Patent: May 7, 2019Assignees: Daicel Value Coating Ltd., Daicel CorporationInventors: Kazuyuki Okada, Kanae Nishimura, Yoshimichi Okano, Takayuki Yaegashi, Keiichi Osano
-
Patent number: 10072108Abstract: Provided is a film, sheet, plate, or other such formed article having excellent transparency made of a copolymer obtained from a cyclic olefin monomer and an ?-olefin monomer. The present invention provides a formed article made from a copolymer having Tg of 170° C. or higher and an Al content of 50 ppm or less that is a copolymer including a structural unit of a cyclic olefin monomer (A) derived from norbornene and a structural unit of a monomer (B) derived from at least one C4-C12 ?-olefin.Type: GrantFiled: April 20, 2015Date of Patent: September 11, 2018Assignee: Daicel CorporationInventors: Takayuki Yaegashi, Keiichi Osano, Yoshimichi Okano, Kouichi Umemoto, Takeshi Yagi
-
Publication number: 20170190815Abstract: Provided is a film, sheet, plate, or other such formed article having excellent transparency made of a copolymer obtained from a cyclic olefin monomer and an ?-olefin monomer. The present invention provides a formed article made from a copolymer having Tg of 170° C. or higher and an Al content of 50 ppm or less that is a copolymer including a structural unit of a cyclic olefin monomer (A) derived from norbornene and a structural unit of a monomer (B) derived from at least one C4-C12 ?-olefin.Type: ApplicationFiled: April 20, 2015Publication date: July 6, 2017Inventors: Takayuki YAEGASHI, Keiichi OSANO, Yoshimichi OKANO, Kouichi UMEMOTO, Takeshi YAGI
-
Publication number: 20170098847Abstract: A polymer film comprises a polymer composition containing (A) a cyclic olefin polymer containing an olefin unit having a C3-10alkyl group as a side chain thereof and (B) a chlorine-containing polymer. The chlorine-containing polymer (B) may comprise a vinylidene chloride-series polymer. The ratio of the chlorine-containing polymer (B) relative to 100 parts by weight of the cyclic olefin polymer (A) may be 0.5 to 60 parts by weight. The film has a moderate releasability from an electrolyte membrane and an electrode membrane of a polymer electrolyte fuel cell and a moderate adhesion to the electrolyte membrane and the electrode membrane and can adhere to a commonly-used substrate film without interposition of an adhesive layer such as an easily adhesive layer. The film is thus suitable as a release film for producing a membrane electrode assembly of a polymer electrolyte fuel cell.Type: ApplicationFiled: April 30, 2015Publication date: April 6, 2017Applicants: DAICEL VALUE COATING LTD., DAICEL CORPORATIONInventors: Kazuyuki OKADA, Kanae NISHIMURA, Yoshimichi OKANO, Takayuki YAEGASHI, Keiichi OSANO
-
Publication number: 20160276689Abstract: A release layer of a release film for producing a membrane electrode assembly of a polymer electrolyte fuel cell comprises a cyclic olefin polymer comprising an olefin unit having a C3-10alkyl group as a side chain thereof. The release layer may have a glass transition temperature of about 210 to 350° C. The release layer may have a transition point of a dynamic storage modulus E? in a range from ?50 to 100° C. An ion exchange layer comprising an ion exchange polymer may be laminated on the release layer of the release film by a roll-to-roll processing to produce a laminate. The release film may be separated from the laminate to give the membrane electrode assembly. The release film achieves improved production of a membrane electrode assembly (an electrolyte membrane and/or an electrode membrane) of a polymer electrolyte fuel cell.Type: ApplicationFiled: November 4, 2014Publication date: September 22, 2016Applicants: DAICEL CORPORATION, DAICEL VALUE COATING LTD.Inventors: Hiroshi ONOMICHI, Katsuhiko SUMITA, Yoshimichi OKANO, Kanae NISHIMURA, Kazuyuki OKADA, Takayuki YAEGASHI, Ken SUZUKI
-
Publication number: 20130133516Abstract: The present invention provides a polymer brush-type filler which contains polymer chains at a high density and with a broad molecular weight distribution. Specifically, the present invention provides fine particles for chromatography comprising graft polymer chains obtained by grafting polymer chains via polymerization initiating groups on the surface of solid particles, wherein the graft polymer chains include specific repeating units, have a specific number average molecular weight and a specific molecular weight distribution and also have a high density of 0.03 chains/nm2 or more and 0.70 chains/nm2 or less.Type: ApplicationFiled: August 19, 2011Publication date: May 30, 2013Inventors: Yoshimichi Okano, Akira Takaragi, Tomoki Kitagawa, Atsushi Ohnishi, Shouji Miyamoto
-
Publication number: 20040068059Abstract: A high molecular weight aliphatic polyester copolymer, a high molecular weight aliphatic polyester copolymer containing polylactic acid; process for industrially producing these copolymers; composition of these copolymers; and various uses thereof. These copolymers have practical properties which make the copolymers moldable. They are free from the problem of plasticizer bleeding and can be degraded by microorganisms present in soils or water. They give moldings, such as sheets and films, which combine a sufficient strength with tear resistance. When the copolymers are ones having a branched structure, they give a molding having excellent mechanical properties. The moldings obtained from compositions containing either of these copolymers are excellent in elongation and biodegradability and have a satisfactory balanc therebetween. In particular, blending with one or more other biodegradable resins gives a molding having better moldability.Type: ApplicationFiled: November 3, 2003Publication date: April 8, 2004Inventors: Hiroshi Katayama, Yoshimichi Okano, Takashi Iiyama, Masaaki Ito, Tadashi Teranishi, Hitomi Omae, Satoru Sumimoto, Kenji Nishimura, Koji Nakata, Kunio Shimizu, Tadashi Murakami
-
Publication number: 20020076361Abstract: The present invention is to provide a preparation device of polyester which can prepare polymers having a high degree of polymerization efficiently using a simpler construction. A polycondensating reactor 2 in which the dicarboxylic acid and the diol are polycondensated under a normal pressure by adding a catalyst having a hydrophobic property, wherein a separating device 10, which separates the organic solvent and water that are distilled from the reactor 2, and fluxes the organic solvent, is attached to the reactor 2 At this time, water, generated during the polycondensation, is captured in the organic solvent without re-approaching polyester that is generated through the reaction in the active center of the catalyst; therefore, it is possible to suppress the hydrolytic reaction of the generated polyester. Consequently, it is possible to allow the polycondensation to further progress even under a normal pressure.Type: ApplicationFiled: June 27, 2001Publication date: June 20, 2002Inventors: Tatsuya Kanno, Yoshimichi Okano, Tokashi Iiyama
-
Patent number: 5548041Abstract: A polycarbonate is produced by transesterification from a dihydroxy compound such as 2,2-bis(4-hydroxyphenyl)propane and a diester of carbonic acid such as bisphenyl carbonate in a reactor made of stainless steel and treated by electropolishing or acid pickling or buffed on a surface part thereof which contacts the reactants. As the transesterification catalyst, (a) a nitrogen-containing, electron-donating compound and (b) a nitrogen-containing, electron-donating compound and an alkali metal compound or an alkaline earth metal compound are preferably used.Type: GrantFiled: August 29, 1995Date of Patent: August 20, 1996Assignee: Daicel Chemical Industries, Ltd.Inventors: Tsutomu Yamato, Yasuhiro Oshino, Yutaka Fukuda, Tatsuya Kanno, Takaaki Kuwana, Yoshimichi Okano
-
Patent number: 5489665Abstract: A polycarbonate is produced by transesterification from a dihydroxy compound such as 2,2-bis(4-hydroxyphenyl)propane and a diester of carbonic acid such as bisphenyl carbonate in the presence of a substance which contains iron in an amount of 50% by weight or less and contacts the reactants. Alternatively, a polycarbonate is produced by transesterification from a dihydroxy compound and a diester of carbonic acid in a reactor made of stainless steel and treated by electropolishing or acid pickling or buffed on a surface part thereof which contacts the reactants. As the transesterification catalyst, (a) a nitrogen-containing, electron-donating compound and (b) a nitrogen-containing, electron-donating compound and an alkali metal compound or an alkaline earth metal compound are preferably used.Type: GrantFiled: October 21, 1994Date of Patent: February 6, 1996Assignee: Daicel Chemical Industries, Ltd.Inventors: Tsutomu Yamato, Yasuhiro Oshino, Yutaka Fukuda, Tatsuya Kanno, Takaaki Kuwana, Yoshimichi Okano
-
Patent number: 5475079Abstract: A (co)polycarbonate composition mainly comprising a (co)polycarbonate having a limiting viscosity number [.eta.] of 0.2 to 1.0 dl/g and terminal hydroxyl groups in an amount of 20 mole % or below, based on all the terminal groups of the (co)polycarbonate, and is substantially free from any branched structure which might otherwise be formed by a side reaction. The (co)polycarbonate contains chlorine (causasive of discoloration) in an amount of 10 ppm or below and an alkali metal ion and/or an alkaline earth metal ion in an amount of 1 ppm or below. A process for preparing the above (co)polycarbonate composition by the melt transesterification process involves the reaction of a dihydroxy compound such as bisphenol A and a carbonic diester such as diphenyl carbonate with a nitrogen-containing basic compound (a), and/or, a compound (b) containing an element selected from the group consisting of elements belonging to Groups I, II, IV and V of the periodic table as a catalyst.Type: GrantFiled: April 15, 1994Date of Patent: December 12, 1995Assignee: Daicel Chemical Industries, Ltd.Inventors: Yoshimichi Okano, Michiyo Tanigawa, Yutaka Fukuda
-
Patent number: 5468836Abstract: A polycarbonate which is not discolored and is substantially free from chlorine ions causative of discoloration, has a branching parameter G of 0.1 to 1.0 and, terminal hydroxyl groups of 20 mole % or below based on all the terminal groups of the polycarbonate, and/or, a chlorine ion concentration in the polycarbonate of 10 ppm or below, and/or, a total of an alkali metal ion concentration and an alkaline earth metal ion concentration in the polycarbonate of 1 ppm or below. A process for preparing the above polycarbonate by the melt transesterification process which comprises using a nitrogenous basic compound (a), and/or, a compound (b) containing an element selected from the group consisting of Groups IIb, IVb and Vb of the periodic table; or, a nitrogenous basic compound (a), and, a compound (c) containing an element selected from the group consisting of alkali metals and alkaline earth metals, as a transesterification catalyst.Type: GrantFiled: September 13, 1993Date of Patent: November 21, 1995Assignee: Daicel Chemical Industries, Ltd.Inventors: Yoshimichi Okano, Tatsuya Kanno, Tsutomu Yamato, Yasuhiro Oshino, Michiyo Tanigawa, Takaaki Kuwana, Yutaka Fukuda
-
Patent number: 5434227Abstract: A polycarbonate is produced by transesterification from a dihydroxy compound such as 2,2-bis(4-hydroxyphenyl)propane and a diester of carbonic acid such as bisphenyl carbonate in the presence of a substance containing iron in an amount of 50% by weight or less to contact the reactants. Also, a polycarbonate is produced by transesterification from a dihydroxy compound and a diester of carbonic acid in a reactor made of stainless steel and treated by electropolishing or acid pickling or buffed on a surface part thereof to contact the reactants. As the transesterification catalyst, (a) a nitrogen-containing, electron-donating compound and (b) a nitrogen-containing, electron-donating compound and an alkali metal compound or an alkaline earth metal compound are preferably used.Type: GrantFiled: March 16, 1992Date of Patent: July 18, 1995Assignee: Daicel Chemical Industries, Ltd.Inventors: Tsutomu Yamato, Yasuhiro Oshino, Yutaka Fukuda, Tatsuya Kanno, Takaaki Kuwana, Yoshimichi Okano