Patents by Inventor Shotaro Maruhashi

Shotaro Maruhashi 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: 20230024626
    Abstract: Expandable chlorinated vinyl chloride-based resin particles from which a chlorinated vinyl chloride-based resin foamed molded product achieving both high expansion ratio and excellent surface appearance are provided. The expandable chlorinated vinyl chloride-based resin particles have a porosity of not more than 5.5 (ml/100 g).
    Type: Application
    Filed: September 22, 2022
    Publication date: January 26, 2023
    Applicant: KANEKA CORPORATION
    Inventors: Yuki Neiwa, Ryuta Kutsumizu, Shotaro Maruhashi, Katsuyuki Tanaka, Hisaki Shimokobe
  • Patent number: 11015033
    Abstract: Expandable styrene resin particles include 2.0 wt % to 8.0 wt % of graphite, and the graphite has a mean particle size of 2.5 ?m to 9 ?m. The expandable styrene resin particles satisfy (i) a laser scattering intensity per unit solution concentration of the graphite is not less than 5 {%/(mg/ml)}/wt %, (ii) an area of the graphite per unit solution concentration of the graphite in 1 mm2 is not less than 55 ({mm2/mm2}/{g/g}), or (iii) when the expandable styrene resin particles are pre-expanded and are made into an expanded molded product having an expansion ratio of 40 times, a value (%/wt %) obtained by dividing, by the content of the graphite (wt %), a percentage of an area occupied by the graphite in a surface layer of the expanded molded product (%), a quotient of which is further multiplied by 100, is not less than 100.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: May 25, 2021
    Assignee: KANEKA CORPORATION
    Inventors: Ryuta Kutsumizu, Shotaro Maruhashi, Ryoji Nakayama, Yoshihito Yano, Kirito Suzuki
  • Publication number: 20180258247
    Abstract: Expandable styrene resin particles include 2.0 wt % to 8.0 wt % of graphite, and the graphite has a mean particle size of 2.5 ?m to 9 ?m. The expandable styrene resin particles satisfy (i) a laser scattering intensity per unit solution concentration of the graphite is not less than 5 {%/(mg/ml)}/wt %, (ii) an area of the graphite per unit solution concentration of the graphite in 1 mm2 is not less than 55 ({mm2/mm2}/{g/g}), or (iii) when the expandable styrene resin particles are pre-expanded and are made into an expanded molded product having an expansion ratio of 40 times, a value (%/wt %) obtained by dividing, by the content of the graphite (wt %), a percentage of an area occupied by the graphite in a surface layer of the expanded molded product (%), a quotient of which is further multiplied by 100, is not less than 100.
    Type: Application
    Filed: September 9, 2016
    Publication date: September 13, 2018
    Applicant: Kaneka Corporation
    Inventors: Ryuta Kutsumizu, Shotaro Maruhashi, Ryoji Nakayama, Yoshihito Yano, Kirito Suzuki
  • Publication number: 20120156002
    Abstract: Disclosed is a container that is capable of maintaining articles requiring thermal management at a prescribed temperature without being influenced by the outside air temperature, and that is capable of storing and transporting the articles. The constant-temperature storage container is equipped with a heat-insulating box, and two or more types of cold-storing materials or heat-storing materials disposed therein; has a latent-heat first cold-storing or heat-storing material (a) disposed in a solid state adjacent to an article being kept cool or warm, and a latent-heat second cold-storing or heat-storing material (b) disposed in a molten state on the exterior of the first cold-storing or heat-storing material (a); and the solidifying and melting temperature of the first cold-storing or heat-storing material (a) exceeds 0° C. The constant-temperature storage container is capable of maintaining the article being kept cool or warm in an arbitrary temperature range exceeding 0° C. for long periods of time.
    Type: Application
    Filed: September 1, 2010
    Publication date: June 21, 2012
    Inventors: Shotaro Maruhashi, Keiji Sato
  • Publication number: 20090197069
    Abstract: An expandable thermoplastic resin and a foamed article thereof excellent in balance between crack resistance and compression strength, which is suitable for light-weighted plastic parts, a heat insulating parts for architecture, and buffer packing materials which is used under the condition where the materials are repeatedly dropped. And expandable thermoplastic resin particles for obtaining a foamed article having crack resistance and compression strength suitable for an automobile interior and having a low combustion rate. And foamed parts for an automobile having both of high crack resistance and high compression strength. Concretely, they relates to expandable thermoplastic resin particles obtained by containing a blowing agent into a thermoplastic resin obtained by polymerizing monomer mixture, in which a macromonomer is contained in the monomer mixture and the gel content of a foamed article obtained from the expandable thermoplastic resin particle is 1 to 40% by weight.
    Type: Application
    Filed: March 28, 2006
    Publication date: August 6, 2009
    Applicant: KANEKA CORPORATION
    Inventors: Kirito Suzuki, Shotaro Maruhashi, Hidekazu Oohara
  • Patent number: 6770682
    Abstract: Foamable modified polystyrene resin particles which are foamable modified polystyrene resin particles (d) comprising modified polystyrene resin particles (c) containing a blowing agent (e); the modified polystyrene resin particles (c) comprising a polystyrene resin and rubber polymer particles (b) being dispersed in the resin, wherein the rubber polymer particles (b) are dispersed uniformly throughout a continuous phase of the polystyrene resin or in a state of a density of the particles (b) being higher in a center portion of the resin particle than in a surface layer portion thereof, and the modified polystyrene resin particles (c) are modified polystyrene resin particles prepared by impregnating a monomer mixture consisting essentially of a styrene monomer and a conjugated diene monomer and comprising the styrene monomer in a larger amount than the conjugated diene monomer, into polystyrene resin particles (a) and carrying out copolymerization.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: August 3, 2004
    Assignee: Kaneka Corporation
    Inventors: Shotaro Maruhashi, Katsuhiko Wakishige, Yuichi Ueda, Hidekazu Oohara
  • Publication number: 20030055119
    Abstract: Foamable modified polystyrene resin particles which are foamable modified polystyrene resin particles (d) comprising modified polystyrene resin particles (c) containing a blowing agent (e); the modified polystyrene resin particles (c) comprising a polystyrene resin and rubber polymer particles (b) being dispersed in the resin, wherein the rubber polymer particles (b) are dispersed uniformly throughout a continuous phase of the polystyrene resin or in a state of a density of the particles (b) being higher in a center portion of the resin particle than in a surface layer portion thereof, and the modified polystyrene resin particles (c) are modified polystyrene resin particles prepared by impregnating a monomer mixture consisting essentially of a styrene monomer and a conjugated diene monomer and comprising the styrene monomer in a larger amount than the conjugated diene monomer, into polystyrene resin particles (a) and carrying out copolymerization.
    Type: Application
    Filed: June 27, 2002
    Publication date: March 20, 2003
    Inventors: Shotaro Maruhashi, Katsuhiko Wakishige, Yuichi Ueda, Hidekazu Oohara