Patents by Inventor Takuma TSUBOI

Takuma TSUBOI 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: 20210054541
    Abstract: A method for producing shortened anionically modified cellulose fibers having an average fiber length of 1 ?m or more and 500 ?m or less, the method including cleaving sugar chains of anionically modified cellulose fibers by thermal decomposition under temperature conditions of 50° C. or higher and 230° C. or lower, wherein the average fiber length of the anionically modified cellulose fibers is 700 ?m or more and 10000 ?m or less. By the use of shortened anionically modified cellulose fibers or the like obtained by the method for production of the present invention, a dispersion containing fine cellulose fibers having a low viscosity and excellent handling property can be prepared while at a high concentration, so that the dispersion can be suitably used in various industrial applications such as daily sundries, household electric appliance parts, packaging materials for household electric appliances, automobile parts, and materials for three-dimensional modeling.
    Type: Application
    Filed: June 6, 2019
    Publication date: February 25, 2021
    Applicant: KAO CORPORATION
    Inventors: Shunsuke FUKUI, Yutaka YOSHIDA, Kyohei YAMATO, Junnosuke SAITO, Takuya MORIOKA, Tadanori YOSHIMURA, Takuma TSUBOI
  • Patent number: 10906993
    Abstract: Modified cellulose fibers, wherein each of (A) one or more substituents selected from substituents represented by the following general formula (1) and substituents represented by the following general formula (2): —CH2—CH(OH)—R1 (1); —CH2—CH(OH)—CH2—(OA)n-O—R1 (2), wherein each R1 in the general formula (1) and the general formula (2) is independently a linear or branched alkyl group having 3 or more carbon atoms and 30 or less carbon atoms; n in the general formula (2) is a number of 0 or more and 50 or less; and A is a linear or branched, divalent saturated hydrocarbon group having 1 or more carbon atoms and 6 or less carbon atoms, and (B) a substituent represented by the following general formula (3): —CH2—CH(OH)—R2 (3), wherein R2 in the general formula (3) is an alkyl group having 1 or more carbon atoms and 2 or less carbon atoms, is independently bonded to cellulose fibers via an ether bond, wherein the modified cellulose fibers have a cellulose I crystal structure.
    Type: Grant
    Filed: September 5, 2016
    Date of Patent: February 2, 2021
    Assignee: KAO CORPORATION
    Inventors: Yutaka Yoshida, Shotaro Shibata, Yoshiaki Kumamoto, Takuma Tsuboi, Motoi Konishi
  • Publication number: 20200071491
    Abstract: The present invention relates to a film comprising hydrophobically modified cellulose fibers in which cellulose fibers are bound to a modifying group at one or more members selected from anionic groups and hydroxyl groups, and an oil having an SP value of 10 or less. The film of the present invention can be utilized in the fields of materials for packaging containers for cosmetics and foods.
    Type: Application
    Filed: March 6, 2018
    Publication date: March 5, 2020
    Applicant: KAO CORPORATION
    Inventors: Kouji OHSAKI, Yoshinori HASEGAWA, Takuma TSUBOI
  • Publication number: 20190322865
    Abstract: A resin composition containing a) a resin, and b) a cellulose fiber composite having a carboxy group in the cellulose molecule, wherein an aldehyde group content is 0.20 mmol/g or less, and wherein the cellulose fiber composite contains a modifying group bound to one or more members selected from a carboxy group and a hydroxyl group. The resin composition of the present invention can be suitably used in various industrial applications such as daily sundries, household electric appliance parts, and automobile parts.
    Type: Application
    Filed: December 25, 2017
    Publication date: October 24, 2019
    Applicant: KAO CORPORATION
    Inventor: Takuma TSUBOI
  • Publication number: 20190169314
    Abstract: Modified cellulose fibers, wherein each of (A) one or more substituents selected from substituents represented by the following general formula (1) and substituents represented by the following general formula (2): —CH2—CH(OH)—R1 (1); —CH2—CH(OH)—CH2—(OA)n-O—R1 (2), wherein each R1 in the general formula (1) and the general formula (2) is independently a linear or branched alkyl group having 3 or more carbon atoms and 30 or less carbon atoms; n in the general formula (2) is a number of 0 or more and 50 or less; and A is a linear or branched, divalent saturated hydrocarbon group having 1 or more carbon atoms and 6 or less carbon atoms, and (B) a substituent represented by the following general formula (3): —CH2—CH(OH)—R2 (3), wherein R2 in the general formula (3) is an alkyl group having 1 or more carbon atoms and 2 or less carbon atoms, is independently bonded to cellulose fibers via an ether bond, wherein the modified cellulose fibers have a cellulose I crystal structure.
    Type: Application
    Filed: September 5, 2016
    Publication date: June 6, 2019
    Applicant: KAO CORPORATION
    Inventors: Yutaka YOSHIDA, Shotaro SHIBATA, Yoshiaki KUMAMOTO, Takuma TSUBOI, Motoi KONISHI
  • Publication number: 20180244806
    Abstract: A rubber composition containing a rubber and modified cellulose fibers, wherein one or more substituents selected from substituents represented by the following general formulas (1) and (2): —CH2—CH(OH)—R1 (1), —CH2—CH(OH)—CH2—(OA)n—O—R1 (2), wherein each R1 in the general formulas (1) and (2) is independently a linear or branched alkyl group having 3 or more carbon atoms and 30 or less carbon atoms; n in the general formula (2) is a number of 0 or more and 50 or less; and A is a linear or branched, divalent saturated hydrocarbon group having 1 or more carbon atoms and 6 or less carbon atoms are bonded to cellulose fibers via an ether bond, wherein the modified cellulose fibers have a cellulose I crystal structure. The rubber composition of the present invention can be suitably used for machine tool parts, household electric appliance parts, automobile parts, and the like.
    Type: Application
    Filed: September 5, 2016
    Publication date: August 30, 2018
    Applicant: KAO CORPORATION
    Inventors: Yutaka YOSHIDA, Takuma TSUBOI, Shotaro SHIBATA, Yoshiaki KUMAMOTO, Motoi KONISHI