Patents Assigned to Sakai Chemical Industry Co. Ltd.
  • Patent number: 11515545
    Abstract: The invention provides an air electrode material powder for solid oxide fuel cells, comprising particles of a perovskite composite oxide represented by the general formula ABO3, and comprising La and Sr as the A-site elements, and Co and Fe as the B-site elements.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: November 29, 2022
    Assignee: SAKAI CHEMICAL INDUSTRY CO., LTD.
    Inventors: Norimune Hirata, Minoru Yoneda
  • Patent number: 11446221
    Abstract: The present invention provides zinc oxide having excellent infrared blocking ability, high whiteness, and excellent texture during use. The present invention relates to trivalent metal-doped hexagonal plate-shaped zinc oxide having an aspect ratio of 2.5 or greater, the trivalent metal-doped hexagonal plate-shaped zinc oxide having a trivalent metal element content based on the zinc element of 0.15 to 5 mol %, a whiteness of 90 or higher, and a powder spectral reflectance at a wavelength of 1500 nm of 80% or less.
    Type: Grant
    Filed: June 8, 2018
    Date of Patent: September 20, 2022
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Ryohei Yoshida, Mitsuo Hashimoto, Kazutaka Murai
  • Patent number: 11434378
    Abstract: The present invention relates to fine barium sulfate powder that can be readily and simply dispersed in resins or solvents; a resin composition, a coating composition, an ink composition, and a resin molded article each containing the barium sulfate powder; and a method for producing the barium sulfate powder. Provided is barium sulfate powder having a number average primary particle size of 1 to 100 nm, the powder including an organic compound on its surface, the powder in the form of compressed compact having a contact angle with distilled water of 10 to 170 degrees.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: September 6, 2022
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Tsutomu Yamamoto, Hironobu Ogata, Hiroaki Hamamura, Masayuki Asada
  • Publication number: 20220173410
    Abstract: A method for producing a metal composite oxide, the method including steps of: preparing a slurry by mixing different kinds of metal compounds in a powder form, a dispersion medium, and a dispersant, and baking the different kinds of metal compounds after the dispersion medium in the slurry is removed. The slurry further includes a polyalkylene oxide having a viscosity average molecular weight of 150,000 or more. The slurry has a viscosity of 10 mPa·s to 2000 mPa·s, the viscosity being measured using a B-type viscometer under conditions of a temperature of 23° C. to 27° C. and a rotation rate of 60 rpm. According to the production method, a slurry in which different kinds metal compound powders are uniformly dispersed and a precipitate is unlikely to be formed can be obtained. Therefore, a metal composite oxide having a desired composition can be obtained.
    Type: Application
    Filed: March 17, 2020
    Publication date: June 2, 2022
    Applicant: SAKAI CHEMICAL INDUSTRY CO., LTD.
    Inventors: Hironao MATSUDA, Minoru YONEDA, Norimune HIRATA, Kazuya MIYASAKA
  • Patent number: 11312902
    Abstract: The present invention provides a method for easily and simply producing a zinc oxide phosphor that has a high level of safety and a high emission intensity and is useful for, for example, cosmetic applications. The present invention also provides a zinc oxide phosphor having such excellent physical properties and a cosmetic product containing the same. Provided is a method for producing a zinc oxide phosphor, including: a raw material mixing step of mixing an oxygen-containing zinc compound and a sulfur-containing compound; and a firing step of firing the raw material mixture obtained in the raw material mixing step, the firing step including firing in a reducing atmosphere followed by firing in an oxygen-containing atmosphere.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: April 26, 2022
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Momoko Ishikawa, Keita Kobayashi, Nanae Ogata, Kenji Mori, Tomonori Tojo
  • Publication number: 20220045336
    Abstract: A powder for an air electrode in a solid oxide fuel cell, the powder consisting of: a metal composite oxide having a perovskite-type single phase crystal structure represented by A11-xA2xBO3-?, where the element A1 is at least one selected from the group consisting of La and Sm, the element A2 is at least one selected from the group consisting of Ca, Sr, and Ba, the element B is at least one selected from the group consisting of Mn, Fe, Co, and Ni, 0<x<1, and the ? is an oxygen deficiency amount. When a cross section of a molded body obtained by compression molding the powder is observed at a magnification of 500 times, and a characteristic X-ray intensity of the element B is measured by an energy dispersive X-ray spectroscopy, the number of regions each having an intensity of 50% or higher of a maximum of the characteristic X-ray intensity of the element B and occupying 0.04% by area or more of the observation field of view is five or less.
    Type: Application
    Filed: July 18, 2019
    Publication date: February 10, 2022
    Applicant: SAKAI CHEMICAL INDUSTRY CO., LTD.
    Inventors: Norimune Hirata, Kazuto Hashimoto, Minoru Yoneda
  • Patent number: 11203530
    Abstract: The present invention provides a method capable of producing hexagonal plate-shaped zinc oxide having a small thickness and a small variation in the particle size. The present invention relates to a method for producing hexagonal plate-shaped zinc oxide, the method including: a step (1) of preparing a slurry mixture containing starting particulate zinc oxide, a zinc acetate solution, and a chloride; and a step (2) of heat aging the slurry mixture obtained in the step (1) at 60° C. to 100° C.
    Type: Grant
    Filed: June 8, 2018
    Date of Patent: December 21, 2021
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Ryohei Yoshida, Mitsuo Hashimoto, Kazutaka Murai
  • Patent number: 11179303
    Abstract: This invention provides a material that is capable of preparing an external composition that achieves high smoothness and low roughness and that reflects near-infrared rays. Specifically, a granular composite comprising keratin and hexagonal plate-shaped zinc oxide particles is provided.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: November 23, 2021
    Assignee: SAKAI CHEMICAL INDUSTRY CO., LTD.
    Inventors: Ryohei Yoshida, Mitsuo Hashimoto, Ikuhisa Nakanishi, Takahiro Domoto
  • Publication number: 20210351416
    Abstract: A powder material for an air electrode in a solid oxide fuel cell, the powder material being a powder of a metal composite oxide having a perovskite crystal structure represented by: A11-xA2xBO3-?, where the element A1 is at least one selected from the group consisting of La and Sm, the element A2 is at least one selected from the group consisting of Ca, Sr, and Ba, the element B is at least one selected from the group consisting of Mn, Fe, Co, and Ni, x satisfies 0<x<1, and ? is an oxygen deficiency amount. The powder has a specific surface area of 20 m2/g or more, satisfies (Crystallite diameter/Specific surface area-based particle diameter)?0.3, and contains elements M in an amount of 300 ppm or less in terms of atoms, the elements M being other than the elements A1, A2 and B, and oxygen.
    Type: Application
    Filed: August 5, 2019
    Publication date: November 11, 2021
    Applicant: SAKAI CHEMICAL INDUSTRY CO., LTD.
    Inventors: Norimune Hirata, Minoru Yoneda
  • Patent number: 11154469
    Abstract: To obtain an inorganic blue fluorescent material that is composed of elements for which there are no suspected harmful effects on humans, and that has excellent texture when applied to skin. A fluorescent material for a cosmetic being a composite oxide containing from 0.0005 to 0.05 (in terms of a mole ratio relative to 1 mol of phosphorous in a molecule) of Ce in a compound represented by general formula CaaPbOc (3.2?a?5.0, b=2, c=a+5) and having an average particle diameter of from 1 to 10 ?m.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: October 26, 2021
    Assignee: SAKAI CHEMICAL INDUSTRY CO., LTD.
    Inventors: Emi Sako, Ryota Ezoe, Nanae Ogata, Kenji Mori
  • Patent number: 11094944
    Abstract: The present invention provides an electrically conductive material having excellent resistance to a high potential and strongly acidic environment and high electrical conductivity; and an electrode material and a fuel cell each including the same. The present invention also provides a method for simply and easily producing such an electrically conductive material. The present invention relates to an electrically conductive material including a titanium suboxide particulate powder, the titanium suboxide particulate powder including a rutile crystalline phase as a main phase, and having a composition of TiOn wherein n is 1.5 or more and 1.90 or less, and a brightness L* in the L*a*b*color system of 35 to 45.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: August 17, 2021
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Seiichi Yano, Hiroshi Tsutsumi, Miho Kishi, Akihiro Uemura, Mayu Ota
  • Publication number: 20210234183
    Abstract: The invention provides an electrolyte material for a solid oxide fuel cell comprising a perovskite oxide comprising at least one element A selected from the group consisting of Ba and Sr, an element Zr, at least one element M selected from the group consisting of Y and Yb, and oxygen, and also a solid phase method for producing the electrolyte material.
    Type: Application
    Filed: August 28, 2019
    Publication date: July 29, 2021
    Applicant: SAKAI CHEMICAL INDUSTRY CO., LTD.
    Inventors: Takuma NISHIMOTO, Kazuya MIYASAKA, Minoru YONEDA
  • Patent number: 11045815
    Abstract: A powder pulverization device is provided. The device includes a hermetically sealed pulverization container, a powder introduction mechanism having an introduction inlet opened inwardly to the pulverization container, and introducing powder to be pulverized to the introduction inlet, a powder pulverization mechanism disposed at a portion below the introduction inlet in the pulverization container, and a classification device disposed at a portion above the introduction inlet in the pulverization container for screening pulverized powder and leading the screened powder out from the pulverization container. An inner wall of the pulverization container is covered with a porous lining material and each hole of the lining material communicates with an air supply via a gap between the inner wall and the lining material.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: June 29, 2021
    Assignee: SAKAI CHEMICAL INDUSTRY CO., LTD.
    Inventors: Koichi Tsuda, Hiromasa Okita
  • Patent number: 11040888
    Abstract: The invention provides a low alpha dose barium sulfate particle having a silica content of 0.6% by weight or less, an average particle diameter of 1 ?m or less, a sulfur content of 10 ppm or less, and an alpha dose of 0.07 cph/cm2 or less.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: June 22, 2021
    Assignee: SAKAI CHEMICAL INDUSTRY CO., LTD.
    Inventors: Satoru Sueda, Hironobu Ogata
  • Patent number: 11033468
    Abstract: The present invention provides a liquid dispersion capable of stably maintaining the dispersed state for a long time and suitably applicable to both O/W type cosmetic products and W/O type cosmetic products. The present invention also provides a cosmetic raw material containing the liquid dispersion and a cosmetic product containing the liquid dispersion. The present invention provides a liquid dispersion containing a polyol (A); a nonionic surfactant (B); and a hydrophobized inorganic powder (C), wherein the water content in 100% by mass of the liquid dispersion is 1% by mass or less.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: June 15, 2021
    Assignee: SAKAI CHEMICAL INDUSTRY CO., LTD.
    Inventors: Takuro Ashida, Koichiro Magara, Akifumi Sano, Ayana Shike
  • Patent number: 11034828
    Abstract: There is provided a liquid stabilizer that can achieve a soft vinyl chloride resin composition having excellent blocking resistance and excellent transparency. A liquid stabilizer for a soft vinyl chloride resin according to the present invention includes: an organic acid zinc salt; an alkaline earth metal salt of an organic acid; and polypropylene glycol having a number-average molecular weight of 2,000 or more and/or ricinoleic acid.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: June 15, 2021
    Assignee: SAKAI CHEMICAL INDUSTRY CO., LTD.
    Inventor: Yuji Yoshida
  • Publication number: 20210170371
    Abstract: The invention provides a polycondensation catalyst for producing polyester by an esterification reaction or a transesterification reaction of a dicarboxylic acid or an ester-forming derivative thereof and a glycol, wherein the polycondensation catalyst comprises particles of a water-insoluble or hardly water-soluble phosphate having on the surfaces a coating layer of titanic acid in an amount, of 0.1 to 100 parts by weight in terms of TiO2 per 100 parts by weight of the phosphate.
    Type: Application
    Filed: December 11, 2018
    Publication date: June 10, 2021
    Applicant: SAKAI CHEMICAL INDUSTRY CO., LTD.
    Inventors: Yuhei SOGA, Akihiro KAMON
  • Patent number: 11020331
    Abstract: The present invention provides a cosmetic product capable of making the skin look youthful and producing a natural three-dimensional appearance. The present invention relates to a cosmetic product including two or more phosphors each containing an inorganic compound, wherein the cosmetic product, upon excitation by excitation light having a wavelength of 365 nm, emits an emission spectrum having a fluorescence emission peak in each of the range of 400 to 530 nm and the range of 620 to 720 nm and having an I2/I1 of 1 to 30, where I1 is a maximum emission intensity in the range of 530 to 620 nm and I2 is a maximum peak intensity in the range of 620 to 720 nm.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: June 1, 2021
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Hisao Koizumi, Momoko Ishikawa, Nanae Ogata, Kenji Mori
  • Patent number: 10947377
    Abstract: The present invention provides a chlorine-containing resin composition capable of providing a processed product that is excellent in thermal stability and heat resistance and that has various excellent properties derived from the chlorine-containing resin in an efficient, easy, simple, and high-yield manner, without degrading the appearance of the processed product. The present invention also provides a method for providing such a processed product. The present invention relates to a chlorine-containing resin composition containing a chlorine-containing resin, a hydrotalcite powder, and organic acid zinc, wherein the hydrotalcite powder contains magnesium (Mg) and/or zinc (Zn), and aluminum (Al), the molar ratio of the total amount of magnesium and zinc to the amount of aluminum ((Mg+Zn)/Al) is 2.20 or less, and the hydrotalcite powder has an oil absorption of 30 ml/100 g or less.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: March 16, 2021
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Koichi Tsuda, Yasuhiro Tai, Toshihiro Nishii
  • Patent number: 10934413
    Abstract: The present invention provides a liquid stabilizer that can provide a formed article excellent in both of transparency and heat resistance, and that is useful as a tin-free stabilizer. The present invention also provides a chlorine-containing resin composition using this stabilizer and a formed body using this stabilizer. The present invention is a liquid stabilizer for a chlorine-containing resin, comprising a zinc toluate and an overbased barium salt, wherein the content of the zinc toluate and the content of the overbased barium salt are 1 to 50% by mass and 50 to 99% by mass, respectively, based on a total amount of the zinc toluate and the overbased barium salt of 100% by mass.
    Type: Grant
    Filed: November 24, 2017
    Date of Patent: March 2, 2021
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventor: Yuji Yoshida