Patents Assigned to Dainichiseika Color & Chemicals Mfg. Co., Ltd.
  • Patent number: 8927972
    Abstract: A current-amplifying transistor device is provided, between an emitter electrode and a collector electrode, with two organic semiconductor layers and a sheet-shaped base electrode. One of the organic semiconductor layers is arranged between the emitter electrode and the base collector electrode, and has a diode structure of a p-type organic semiconductor layer and an n-type p-type organic semiconductor layer. A current-amplifying, light-emitting transistor device including the current-amplifying transistor device and an organic EL device portion formed in the current-amplifying transistor device is also disclosed.
    Type: Grant
    Filed: September 3, 2010
    Date of Patent: January 6, 2015
    Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd.
    Inventors: Ken-ichi Nakayama, Junji Kido, Yong-Jin Pu, Fumito Suzuki, Naomi Oguma, Naoki Hirata
  • Publication number: 20140361227
    Abstract: Provided by the present invention is a conductive resin composition which has, by adding small amount of a carbon nanotube thereto, high conductivity and superior processability including moldability while keeping original physical properties owned by the thermoplastic resin itself. Provided is a method for producing a conductive resin composition, that is, a method for producing a conductive resin composition which contains a carbon nanotube and a thermoplastic resin, wherein the method contains following steps of (A) and (B); namely, (A) a step of mixing and dispersing the carbon nanotube, a solvent, and the thermoplastic resin, thereby obtaining a carbon nanotube resin mixture, and (B) a step of removing the solvent while kneading the carbon nanotube resin mixture. Provided further is a conductive resin composition obtained by the said production method.
    Type: Application
    Filed: January 22, 2013
    Publication date: December 11, 2014
    Applicant: DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD.
    Inventors: Hisaki Asakawa, Masayuki Shibata, Noritaka Sakuta, Takuma Itoh
  • Patent number: 8895646
    Abstract: Disclosed are a resin-treated pigment characterized in that the resin-treated pigment comprises a pigment and a polymer of an unsaturated bond-containing monomer, a weight ratio of the pigment to the polymer (pigment:polymer) is from 50 to 95 to from 5 to 50, and the polymer is a block copolymer comprising from 5 to 70 mass % of an addition-polymerizable monomer having a UV-absorbing group; a production process of the resin-treated pigment; and a pigment dispersion using the resin-treated pigment.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: November 25, 2014
    Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Kyoto University
    Inventors: Hiroyuki Shimanaka, Yoshikazu Murakami, Shinichiro Aoyagi, Atsushi Goto, Yoshinobu Tsujii
  • Patent number: 8895963
    Abstract: An organic semiconductor material is represented by the following formula (F): wherein A represents a cyclic conjugated skeleton structure formed of one or more aromatic rings, and R1 and R2 each independently represent a substituted or unsubstituted alkyl group. The organic semiconductor material has high electron mobility and high on/off ratio, and can form an organic semiconductor thin film by a solution process making use of its solution.
    Type: Grant
    Filed: May 11, 2010
    Date of Patent: November 25, 2014
    Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd.
    Inventors: Ken-ichi Nakayama, Junji Kido, Yong-Jin Pu, Yohei Hashimoto, Naomi Oguma, Naoki Hirata
  • Patent number: 8822591
    Abstract: Disclosed is a pigment dispersion containing at least a pigment, a liquid medium and a high-molecular dispersant. The high-molecular dispersant is a block polymer represented by A-B or A-B-C, in which A, B and C each represent a polymer block and the A and C blocks may be the same or different. The block polymer and its production process are also disclosed. The high-molecular dispersant is free of problems of a smell, coloration, a heavy metal and cost, and its use can provide a pigment dispersion excellent in the dispersion stability of a pigment.
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: September 2, 2014
    Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Kyoto University
    Inventors: Yoshikazu Murakami, Hiroyuki Shimanaka, Toshiyuki Hitotsuyanagi, Shinya Tsuchida, Atsushi Goto, Yoshinobu Tsujii, Takeshi Fukuda
  • Publication number: 20140235916
    Abstract: A method for removing radioactive cesium and/or iodine from a radioactive substance in liquid and/or a solid matter using a hydrophilic resin composition comprising a hydrophilic resin and a metal ferrocyanide compound, wherein the hydrophilic resin includes at least one hydrophilic resin selected from the group consisting of a hydrophilic polyurethane resin, a hydrophilic polyurea resin, and a hydrophilic polyurethane-polyurea resin each having at least a hydrophilic segment, and a metal ferrocyanide compound is dispersed in the hydrophilic resin composition in a ratio of at least 1 to 200 mass parts relative to 100 mass parts of the hydrophilic resin.
    Type: Application
    Filed: April 30, 2014
    Publication date: August 21, 2014
    Applicants: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Ukima Chemicals & Color Mfg. Co., Ltd.
    Inventors: Kazuyuki HANADA, Manabu URUNO, Kazuya KIMURA, Kenichi TAKAHASHI
  • Patent number: 8798465
    Abstract: An optical path switching type optical signal transmission/reception apparatus includes a one-to-seven compatible optically controlled optical path switching apparatus 100 that is connected to a host optical signal transmission/reception apparatus 1 via an optical fiber, a total of seven subordinate optical communication adapters 110 connected via optical fibers, user side devices 160 connected to respective subordinate optical communication adapters via an electric circuit, an optical transmission/reception control circuit provided in each of the total of seven subordinate user side optical communication adapters 110, and including an uplink optical signal transmission mechanism, a downlink optical signal reception mechanism, a control light source that can generate control light to drive the optical path switching apparatus 100, in which a wavelength of the generated control light is different from a wavelength of signal light, and an optical communication oriented transmission/reception mechanism using the
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: August 5, 2014
    Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Inter Energy Co., Ltd., National Institute of Advanced Industrial Science and Technology
    Inventors: Norio Tanaka, Shigeru Takarada, Hirobumi Watanabe, Shiro Futaki, Ichiro Ueno, Takashi Hiraga, Noritaka Yamamoto
  • Publication number: 20140150692
    Abstract: An object is to overcome the drawbacks of conventional blue phthalocyanine pigments upon the formation of images, and to develop a blue pigment that can satisfactorily exhibit a greenish blue color high in chroma and excellent in colorfulness, brightness, dispersibility, hue, tinting power and the like and that is applicable to various image recording methods. The object can be achieved by a greenish blue pigment, which exhibits a greenish blue hue of high chroma and contains a pigment represented by the following formula (I): wherein the number, m, of substituent phthalimidomethyl group(s) is in a range of 1.0?m?5.0, and the number, n, of a substituent sulfonic group R1 is in a range of 0.05?n?1.0.
    Type: Application
    Filed: July 19, 2012
    Publication date: June 5, 2014
    Applicant: DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD.
    Inventors: Koji Tsuchiya, Masahiko Aoba, Kenjiro Matsumoto, Takeshi Tamaki
  • Publication number: 20140112972
    Abstract: Provided is an adhesion preventing medical material including a bioresorbable base material and a polyhydric alcohol or aqueous polyhydric alcohol solution, which contains the polyhydric alcohol, held in the bioresorbable base material. The bioresorbable base material includes a bioresorbable material, and has a swelling degree of 200 to 3,000 mass % and a water elution rate of not higher than 10 mass %. After immersed for 3 hours in water of 25° C. in an amount at least 50 times a total mass of the aqueous polyhydric alcohol solution or aqueous polyhydric alcohol solution and the bioresorbable base material, the polyhydric alcohol remains in an amount of not greater than 30 mass % of that of the polyhydric alcohol before the immersion.
    Type: Application
    Filed: January 2, 2014
    Publication date: April 24, 2014
    Applicant: Dainichiseika Color & Chemicals MFG. Co., Ltd.
    Inventors: Yasuharu NOISHIKI, Takanori SANNAN, Yasuyuki ISONO, Shinzo KANAO, Hiroshi ITOH, Yoshihiko IIJIMA
  • Patent number: 8703648
    Abstract: Disclosed are a polysiloxane-modified polyhydroxy polyurethane resin derived from a reaction between a 5-membered cyclic carbonate compound and an amine-modified polysiloxane compound, and its production process; and a resin composition, thermal recording medium, imitation leather, thermoplastic polyolefin resin skin material, weather strip material, and weather strip, all of which make use of the resin.
    Type: Grant
    Filed: November 25, 2010
    Date of Patent: April 22, 2014
    Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Ukima Chemicals & Color Mfg. Co., Ltd.
    Inventors: Kazuyuki Hanada, Kazuya Kimura, Kenichi Takahashi, Osamu Kawakami, Manabu Uruno
  • Publication number: 20140030526
    Abstract: A problem is to provide polyhydroxyurethane microparticles, which have a narrow particle size distribution and are applicable to a wide range of use. Provided are polyhydroxyurethane microparticles which are spherical polymer microparticles having particle sizes of 0.1 ?m to 300 ?m. A polymer that makes up the polymer microparticles has in a structure thereof chemical structure units represented by the following formula (1) and/or chemical structure units represented by the following formula (2). In the chemical structure units (1) and (2), —O—CO— bonds have been derived from carbon dioxide.
    Type: Application
    Filed: April 24, 2012
    Publication date: January 30, 2014
    Applicants: UKIMA CHEMICALS & COLOR MFG. CO., LTD., DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD.
    Inventors: Manabu Uruno, Kenichi Takahashi, Kazuya Kimura, Kazuyuki Hanada
  • Publication number: 20140024274
    Abstract: A problem is to provide, in the field of polyhydroxy polyurethane resins the development of applications of which has not moved ahead by conventional technologies, a self-crosslinking polyhydroxy polyurethane resin, which enables to provide products, such as imitation leathers, excellent in abrasion resistance, chemical resistance, heat resistance and the like, and moreover, which is useful from the view point of a reduction in greenhouse gas, contains carbon dioxide incorporated and fixed therein, and is responsive to environmental conservation.
    Type: Application
    Filed: April 2, 2012
    Publication date: January 23, 2014
    Applicants: UKIMA CHEMICALS & COLOR MFG. CO., LTD., DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD.
    Inventors: Kazuyuki Hanada, Kazuya Kimura, Kenichi Takahashi, Manabu Uruno
  • Patent number: 8628610
    Abstract: A carbon filler dispersant for dispersing a carbon filler in a liquid medium comprised of an aqueous solvent or nonaqueous solvent contains, as a principal component, a hydroxylalkyl chitosan, specifically at least one hydroxyalkyl chitosan selected from the group consisting of glycerylated chitosan, hydroxyethyl chitosan, hydroxypropyl chitosan, hydroxybutyl chitosan, and hydroxybutyl hydroxypropyl chitosan.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: January 14, 2014
    Assignee: Dainichiseika Color & Chemicals Mfg. Co., Ltd.
    Inventors: Nobuyuki Kobayashi, Takanori Sannan, Shinya Tsuchida, Yoshihiko Iijima
  • Publication number: 20130343789
    Abstract: Provided is an electrically conductive roller capable of preventing the occurrence of filming for a long time and of providing toners with a desired quantity of electric charge, and a development apparatus and an image-forming device capable of forming high quality images for a long time. The electrically conductive roller has a urethane coat layer that contains a urethane resin and a particulate amino resin, wherein the urethane coat layer is formed on an outer circumferential face of an elastic layer, and a development apparatus and image-forming device equipped with the electrically conductive roller.
    Type: Application
    Filed: January 19, 2012
    Publication date: December 26, 2013
    Applicants: DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD., SHIN-ETSU POLYMER CO., LTD.
    Inventors: Sokuei Motoda, Ryo Nakajima, Isao Harashima, Kiyoshi Ootani, Norihiko Akegamiyama
  • Publication number: 20130338273
    Abstract: Disclosed is an emulsion binder containing an A-B block copolymer. The A-B block copolymer has a number average molecular weight of 5,000 to 100,000, and a polydispersity index (weight average molecular weight/number average molecular weight) of not greater than 1.7. The polymer block A has an acid value of 0 to 30 mgKOH/g and a glass transition point of not higher than 60° C. The polymer block B has an acid value of 75 to 250 mgKOH/g. The A-B block copolymer has been neutralized with an alkaline material, and has been allowed to self-emulsify in an aqueous medium to form emulsion particles having an average particle size of 30 to 300 nm.
    Type: Application
    Filed: November 28, 2011
    Publication date: December 19, 2013
    Applicants: KYOTO UNIVERSITY, DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD.
    Inventors: Hiroyuki Shimanaka, Yoshikazu Murakami, Shinichio Aoyagi, Atsushi Goto, Hironori Kaji
  • Publication number: 20130323491
    Abstract: Provided are a coating composition for forming a gas barrier layer as configured such that a specific compound having two or more 5-membered cyclic carbonate groups and a compound having two or more amino groups are reactable at an equivalent ratio of functional groups of 0.8 to 1.25 to form the gas barrier layer with a polyhydroxyurethane resin as a principal component; a gas barrier film formed of a single layer or multiple layers, at least one of the layer or layers that forms or form the film is a layer that exhibits gas barrier properties, and the layer is formed of a polyhydroxyurethane resin having a specific chemical structure; and a production method of a film having gas barrier properties.
    Type: Application
    Filed: February 22, 2012
    Publication date: December 5, 2013
    Applicants: UKIMA CHEMICALS & COLOR MFG. CO., LTD., DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD.
    Inventors: Kenichi Takahashi, Manabu Uruno, Kazuya Kimura, Kazuyuki Hanada
  • Publication number: 20130320271
    Abstract: This invention relates to a coating formulation for manufacturing an electrode plate, which contains a solution of a hydroxyalkylchitosan and an organic acid and/or its derivative in an aprotic polar solvent, and an active material added to the solution and kneaded with the solution, the electrode plate, a manufacturing process of the electrode plate, a battery, a capacitor, and an undercoating formulation. According to this invention, a coating formulation for manufacturing an electrode plate for a nonaqueous electrolyte secondary battery or an electrode plate for an electric double layer capacitor having excellent adhesion and improved contact resistance between an active material layer and a collector, the electrode plate, its manufacturing process, the battery and the capacitor can be provided.
    Type: Application
    Filed: August 5, 2013
    Publication date: December 5, 2013
    Applicants: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Kyoritsu Chemical & Co., Ltd.
    Inventors: Satoshi YAMAZAKI, Takaya Sato, Takanori Sannan, Nobuyuki Kobayashi, Shinya Tsuchida
  • Publication number: 20130316231
    Abstract: An aqueous liquid composition contains a water-based medium containing water, a polymer having at least one type of groups selected from hydroxyl groups and amino groups, and phosphonobutanetricarboxylic acid. The aqueous liquid composition contains low-cost materials having low environmental load, can retain adequate viscosity even when stored over a long term, and can form a functional coating film having excellent adhesiveness to a base material and superb durability, solvent resistance and waterproofness and capable of exhibiting various functions led by electrical conductivity and hydrophilicity.
    Type: Application
    Filed: August 1, 2013
    Publication date: November 28, 2013
    Applicant: Dainichiseika Color & Chemicals Mfg. Co., Ltd.
    Inventors: Yoshihiko IIJIMA, Kozaburo HAYASHI, Yosuke ICHINOMIYA
  • Publication number: 20130316232
    Abstract: An aqueous liquid composition contains a water-based medium containing water, chitosan and/or a chitosan derivative, and a polymeric acid, and has a pH of not higher than 4.5. The aqueous liquid composition contains low-cost materials having low environmental load, can retain adequate viscosity even when stored over a long term, and can form a functional coating film having excellent adhesiveness to a base material and superb durability, solvent resistance and waterproofness and capable of exhibiting various functions led by electrical conductivity and hydrophilicity.
    Type: Application
    Filed: August 1, 2013
    Publication date: November 28, 2013
    Applicant: Dainichiseika Color & Chemicals Mfg. Co., Ltd.
    Inventors: Yoshihiko IIJIMA, Kozaburo HAYASHI, Yosuke ICHINOMIYA
  • Patent number: 8546502
    Abstract: Disclosed are a production process of a dye polymer having a dye content of from 1 to 50 wt %, and the dye polymer and its use. The production process includes subjecting an addition-polymerizable monomer to living radical polymerization by using, as a polymerization initiator, a dye having a polymerization initiating group enabling the living radical polymerization. The dye polymer and a composition of the dye polymer and a pigment are useful as good coloring agents for various products or articles. The colored products or articles are high in transparency, and are provided with high added value. The dye polymer can also be used as a dispersant for pigments, thereby making it possible to afford pigment dispersions excellent in dispersion properties and dispersion stability.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: October 1, 2013
    Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd., Kyoto University
    Inventors: Hiroyuki Shimanaka, Toshiyuki Hitotsuyanagi, Yoshikazu Murakami, Atsushi Goto, Yoshinobu Tsujii, Takeshi Fukuda