Patents by Inventor Shukichi Tanaka

Shukichi Tanaka 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).

  • Patent number: 11434350
    Abstract: A cellulose resin composition comprising a cellulose derivative (A) and a lubricant (B), wherein the cellulose derivative (A) is a cellulose derivative obtained by substituting at least a part of hydrogen atoms of hydroxyl groups of a cellulose with a short-chain organic group having 2 to 4 carbon atoms and a long-chain organic group having 8 to 30 carbon atoms with specific degrees of substitution; the lubricant (B) is at least one selected from the group consisting of a urea compound (B1) having a urea group (—NH—C(?O)—NH—) and an acyclic aliphatic group having 6 to 33 carbon atoms, an amide compound (B2) having an amide group (—C(?O)—NH—) and an acyclic aliphatic group having 6 to 33 carbon atoms, a fatty acid metal salt (B3), and a silicone-based lubricant (B4); and a content of the lubricant (B) is in a range of 0.1 to 10% by mass. A cellulose resin composition capable of forming a molded body having a high-quality appearance and scratch resistance is provided.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: September 6, 2022
    Assignee: NEC CORPORATION
    Inventors: Midori Shimura, Shukichi Tanaka, Kiyohiko Toyama, Masatoshi Iji, Mina Shimizu, Toshie Miyamoto
  • Publication number: 20220243033
    Abstract: The present invention provides a cellulose resin composition capable of forming a molded body having high-quality appearance and scratch resistance. A cellulosic resin composition including a cellulose derivative, a lubricant, and a plasticizer, wherein the cellulose derivative is an acylated cellulose obtained by substituting at least a part of hydrogen atoms of hydroxy groups of a cellulose with an acetyl group, the content of the lubricant is in the range of 0.1 to 10% by mass, the plasticizer comprises an adipic acid mixed ester composed of adipic acid and diethylene glycol monomethyl ether and benzyl alcohol, and the content of the plasticizer is in the range of 5 to 70 parts by weight with respect to 100 parts by weight of the cellulose derivative (A).
    Type: Application
    Filed: June 12, 2020
    Publication date: August 4, 2022
    Applicant: NEC Corporation
    Inventors: Shukichi TANAKA, Kiyohiko TOYAMA, Midori SHIMURA, Toshie MIYAMOTO
  • Publication number: 20220235202
    Abstract: The present invention provides a cellulose resin composition capable of forming a molded body having high-quality appearance and scratch resistance. A cellulose resin composition including a cellulose derivative, a lubricant, a plasticizer, and a colorant, wherein the cellulose derivative is an acylated cellulose obtained by substituting at least a part of hydrogen atoms of hydroxy groups of a cellulose with an acyl group having 2 to 4 carbon atoms, the content of the lubricant is in a range of 0.1 to 10% by mass, the plasticizer is an aromatic plasticizer, the content of the plasticizer is in a range of 0.1 to 100 parts by mass per 100 parts by mass of the cellulose derivative, and the content of the colorant is in a range of 0.01 to 10% by mass.
    Type: Application
    Filed: June 12, 2020
    Publication date: July 28, 2022
    Applicant: NEC Corporation
    Inventors: Kiyohiko TOYAMA, Shukichi TANAKA, Midori SHIMURA, Toshie MIYAMOTO
  • Publication number: 20210340282
    Abstract: A paramylon-based resin having a weight-average molecular weight of paramylon in a range of 70000 to 140000, and formed by substituting hydrogen atoms of hydroxy groups of a paramylon with a long-chain component being a linear saturated aliphatic acyl group having 14 or more carbon atoms and a short-chain component being an acyl group (acetyl group or/and propionyl group) having 2 or 3 carbon atoms, wherein a degree of substitution with the long-chain component (DSLo) and a degree of substitution with the short-chain component (DSSh) satisfy the following conditional expressions (1) and (2), Izod impact strength is 5.0 kJ/m2 or more, and an MFR (melt flow rate at 210° C. and under a load of 5 kg) is 2 g/10 min or more. To provide a paramylon-based resin excellent in mechanical characteristics and thermoplasticity. 2.2?DSLo+DSSh?2.
    Type: Application
    Filed: July 10, 2019
    Publication date: November 4, 2021
    Applicants: NEC CORPORATION, UNIVERSITY OF TSUKUBA
    Inventors: Midori SHIMURA, Shukichi TANAKA, Toshie MIYAMOTO, Masatoshi IJI
  • Patent number: 11161917
    Abstract: A method for producing a cellulose derivative, including reacting a mixed acid anhydride having two particular types of acyl groups with cellulose in the presence of a base catalyst in an organic solvent having an electron pair-donating property to form a cellulose derivative with the two types of acyl groups derived from the mixed acid anhydride, the acyl groups being introduced at hydroxy groups in the cellulose.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: November 2, 2021
    Assignee: NEC CORPORATION
    Inventors: Shukichi Tanaka, Kiyohiko Toyama, Masatoshi Iji
  • Patent number: 11028186
    Abstract: A cellulose derivative obtained by substituting at least part of hydrogen atoms of hydroxy groups of a cellulose with an acyl group having 2 to 4 carbon atoms, a long-chain organic group having 7 or more carbon atoms and a high refractive-index organic group.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: June 8, 2021
    Assignee: NEC CORPORATION
    Inventors: Kiyohiko Toyama, Masatoshi Iji, Midori Shimura, Shukichi Tanaka
  • Patent number: 10982009
    Abstract: To provide a cellulose derivative excellent in thermoplasticity, water resistance and strength (elastic modulus, impact strength), a cellulose derivative, which is obtained by introducing a short-chain organic group (acetyl group), a medium-chain organic group having 3 to 5 carbon atoms and a long-chain organic group having 6 to 30 carbon atoms at the following substitution degrees DSs into a cellulose, is used: Short-chain organic group: 0.7?DSSH?1.5; Medium-chain organic group: 0.5?DSME?2.0; Long-chain organic group: 0.1?DSLO<0.5; and 2.4?DSSH+DSME+DSLO?3.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: April 20, 2021
    Assignee: NEC CORPORATION
    Inventors: Midori Shimura, Shukichi Tanaka, Kiyohiko Toyama, Masatoshi Iji
  • Patent number: 10961388
    Abstract: Resin compositions according to exemplary embodiments of the present invention are first compositions containing a polylactic acid resin, an aliphatic polyester resin, a surface-treated metal hydrate, and a carbodiimide compound, or second compositions containing a polysiloxane-mixed polyester resin, a phosphorus-containing flame retardant, a metal hydrate and a fluorine-containing polymer in specific ratios.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: March 30, 2021
    Assignee: NEC CORPORATION
    Inventors: Makoto Soyama, Masatoshi Iji, Shukichi Tanaka, Kiyohiko Toyama
  • Publication number: 20210070966
    Abstract: A cellulose resin composition comprising a cellulose derivative (A) and a lubricant (B), wherein the cellulose derivative (A) is a cellulose derivative obtained by substituting at least a part of hydrogen atoms of hydroxyl groups of a cellulose with a short-chain organic group having 2 to 4 carbon atoms and a long-chain organic group having 8 to 30 carbon atoms with specific degrees of substitution; the lubricant (B) is at least one selected from the group consisting of a urea compound (B1) having a urea group (—NH—C(?O)—NH—) and an acyclic aliphatic group having 6 to 33 carbon atoms, an amide compound (B2) having an amide group (—C(?O)—NH—) and an acyclic aliphatic group having 6 to 33 carbon atoms, a fatty acid metal salt (B3), and a silicone-based lubricant (B4); and a content of the lubricant (B) is in a range of 0.1 to 10% by mass. A cellulose resin composition capable of forming a molded body having a high-quality appearance and scratch resistance is provided.
    Type: Application
    Filed: December 17, 2018
    Publication date: March 11, 2021
    Applicant: NEC CORPORATION
    Inventors: Midori SHIMURA, Shukichi TANAKA, Kiyohiko TOYAMA, Masatoshi IJI, Mina SHIMIZU, Toshie MIYAMOTO
  • Patent number: 10934368
    Abstract: A cellulose resin formed by substituting hydrogen atoms of hydroxy groups of a cellulose with a long-chain component being a linear saturated aliphatic acyl group having 14 or more carbon atoms and a short-chain component being an acyl group having 2 or 3 carbon atoms, in which a degree of substitution with the long-chain component (DSLo) and a degree of substitution with the short-chain component (DSSh) satisfy conditional expressions (1) and (2) shown below: DSLo+DSSh?2.1??(1) 4?DSSh/DSLo?12??(2).
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: March 2, 2021
    Assignee: NEC CORPORATION
    Inventors: Shukichi Tanaka, Midori Shimura, Masatoshi Iji
  • Publication number: 20200399402
    Abstract: A cellulose resin in which hydrogen atoms of hydroxy groups of cellulose are substituted with a long-chain component which is a linear aliphatic acyl group having 14 or more carbon atoms and a short-chain component which is at least one of an acyl group having 2 carbon atoms and an acyl group having 3 carbon atoms, wherein a nitrogen content in the cellulose resin is 300 ppm or more and 2000 ppm or less. To provide a cellulose resin excellent in mechanical properties and heat decomposition resistance.
    Type: Application
    Filed: February 14, 2019
    Publication date: December 24, 2020
    Applicant: NEC CORPORATION
    Inventor: Shukichi TANAKA
  • Publication number: 20200385548
    Abstract: A cellulose resin composition comprising a cellulose derivative and a lubricant, wherein the cellulose derivative is an acylated cellulose obtained by substituting at least a part of hydrogen atoms of hydroxy groups of a cellulose with an acyl group having 2 to 4 carbon atoms, and the content of the lubricant is in the range of 0.1 to 10% by mass. A cellulose resin composition capable of forming a molded body having a high-quality appearance and scratch resistance is provided.
    Type: Application
    Filed: December 17, 2018
    Publication date: December 10, 2020
    Applicant: NEC CORPORATION
    Inventors: Kiyohiko TOYAMA, Mina SHIMIZU, Masatoshi IJI, Midori SHIMURA, Shukichi TANAKA, Toshie MIYAMOTO
  • Publication number: 20200263028
    Abstract: Resin compositions according to exemplary embodiments of the present invention are first compositions containing a polylactic acid resin, an aliphatic polyester resin, a surface-treated metal hydrate, and a carbodiimide compound, or second compositions containing a polysiloxane-mixed polyester resin, a phosphorus-containing flame retardant, a metal hydrate and a fluorine-containing polymer in specific ratios.
    Type: Application
    Filed: December 2, 2016
    Publication date: August 20, 2020
    Applicant: NEC CORPORATION
    Inventors: Makoto SOYAMA, Masatoshi IJI, Shukichi TANAKA, Kiyohiko TOYAMA
  • Publication number: 20200181289
    Abstract: A cellulose resin wherein a hydrogen atom of a hydroxy group of cellulose is substituted with a long-chain component which is a linear saturated aliphatic acyl group having 14 or more carbon atoms and a short-chain component which is an acyl group (propionyl group) having 3 carbon atoms, the degree of substitution with the long-chain component (DSLo) and the degree of substitution with the short-chain component (DSSh) satisfy the following conditional expressions (1) and (2): DSLo+DSSh?2.1??(1) 4?DSSh/DSLo?12??(2), the Izod impact strength is 5.0 kJ/m2 or more, and the MFR (melt flow rate at 200° C. and under a load of 5 kg) is 10 g/10 min or more.
    Type: Application
    Filed: May 31, 2018
    Publication date: June 11, 2020
    Applicant: NEC CORPORATION
    Inventors: Shukichi TANAKA, Midori SHIMURA
  • Publication number: 20190330379
    Abstract: A cellulose derivative obtained by substituting at least part of hydrogen atoms of hydroxy groups of a cellulose with an acyl group having 2 to 4 carbon atoms, a long-chain organic group having 7 or more carbon atoms and a high refractive-index organic group.
    Type: Application
    Filed: June 15, 2017
    Publication date: October 31, 2019
    Applicant: NEC CORPORATION
    Inventors: Kiyohiko TOYAMA, Masatoshi IJI, Midori SHIMURA, Shukichi TANAKA
  • Patent number: 10381204
    Abstract: Provided is an ultra-high vacuum forming device containing an ion pump having a compact size in the central axis direction. The ultra-high vacuum forming device (1) is provided with at least one ion pump (100). The ion pump (100) is provided with: a casing (110) having at least one opening (111, 112); a board-shaped electrode group (120) formed by means of a central opening (120a) being formed along a predetermined central axis (C) disposed within the casing (110), and a plurality of electrodes (121) being joined with spaces therebetween; a pair of board-shaped electrodes (131, 132) having a different polarity than that of the electrode group (120) and that are disposed at positions sandwiching both sides of the electrode group (120) within the casing (110); and a pair of board-shaped magnets (141, 142) disposed at positions sandwiching both sides of the pair of board-shaped electrodes (131, 132).
    Type: Grant
    Filed: April 21, 2015
    Date of Patent: August 13, 2019
    Assignee: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY
    Inventor: Shukichi Tanaka
  • Publication number: 20190048099
    Abstract: A method for producing a cellulose derivative, including reacting a mixed acid anhydride having two particular types of acyl groups with cellulose in the presence of a base catalyst in an organic solvent having an electron pair-donating property to form a cellulose derivative with the two types of acyl groups derived from the mixed acid anhydride, the acyl groups being introduced at hydroxy groups in the cellulose.
    Type: Application
    Filed: October 15, 2018
    Publication date: February 14, 2019
    Applicant: NEC Corporation
    Inventors: Shukichi TANAKA, Kiyohiko TOYAMA, Masatoshi IJI
  • Publication number: 20190010251
    Abstract: A cellulose resin formed by substituting hydrogen atoms of hydroxy groups of a cellulose with a long-chain component being a linear saturated aliphatic acyl group having 14 or more carbon atoms and a short-chain component being an acyl group having 2 or 3 carbon atoms, in which a degree of substitution with the long-chain component (DSLo) and a degree of substitution with the short-chain component (DSSh) satisfy conditional expressions (1) and (2) shown below: DSLo+DSSh?2.1??(1) 4?DSSh/DSLo?12??(2).
    Type: Application
    Filed: December 9, 2016
    Publication date: January 10, 2019
    Applicant: NEC CORPORATION
    Inventors: Shukichi TANAKA, Midori SHIMURA, Masatoshi IJI
  • Publication number: 20180355066
    Abstract: A process for producing a cellulose derivative, comprising: a first step including reacting a cellulose and a first reactant comprising a long-chain reactant for reacting with a hydroxy group of the cellulose to introduce a long-chain organic group having 5 or more carbon atoms, in a solid-liquid heterogeneous system, to form a cellulose derivative in a swollen state, the cellulose derivative having the long-chain organic group having 5 or more carbon atoms introduced therein and having a part of hydroxy groups of the cellulose remained, and performing solid-liquid separation to obtain the cellulose derivative as an intermediate; and a second step including reacting the intermediate cellulose derivative and a second reactant comprising a short-chain reactant for reacting with a remaining hydroxy group of the intermediate cellulose derivative to introduce a short-chain organic group having 4 or less carbon atoms to form a final cellulose derivative having the short-chain organic group having 4 or less carbon a
    Type: Application
    Filed: June 11, 2018
    Publication date: December 13, 2018
    Applicant: NEC Corporation
    Inventors: Kiyohiko TOYAMA, Masatoshi IJI, Shukichi TANAKA
  • Publication number: 20180346713
    Abstract: A polylactic acid resin composition according to an embodiment of the invention includes a polylactic acid resin, an aliphatic polyester resin, a carbodiimide compound and a metal hydrate, in which the metal hydrate is surface-treated with a specific silane coupling agent; and the carbodiimide compound includes an aliphatic carbodiimide compound.
    Type: Application
    Filed: December 2, 2016
    Publication date: December 6, 2018
    Applicant: NEC CORPORATION
    Inventors: Makoto SOYAMA, Masatoshi IJI, Shukichi TANAKA, Kiyohiko TOYAMA