Patents by Inventor Keijiro Okawachi

Keijiro Okawachi 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).

  • Resin for active-energy-ray-curable ink, composition for active-energy-ray-curable ink, and active-energy-ray-curable ink
    Patent number: 11472976
    Abstract: In a resin for an active-energy-ray-curable ink containing a rosin-modified polyester resin, the rosin-modified polyester resin includes a reaction product of a material component containing rosins, a dibasic acid, and a polyol. The rosin-modified polyester resin has an ester bond in an amount of 5.20 mol/kg or more and 7.20 mol/kg or less. The rosin-modified polyester resin has an acid value of 1 mgKOH/g or more and 30 mgKOH/g or less. The rosin-modified polyester resin has a hydroxyl value of 1 mgKOH/g or more and 40 mgKOH/g or less.
    Type: Grant
    Filed: March 22, 2021
    Date of Patent: October 18, 2022
    Assignee: HARIMA CHEMICALS, INCORPORATED
    Inventors: Keijiro Okawachi, Hironori Matsushima
  • RESIN FOR ACTIVE-ENERGY-RAY-CURABLE INK, COMPOSITION FOR ACTIVE-ENERGY-RAY-CURABLE INK, AND ACTIVE-ENERGY-RAY-CURABLE INK
    Publication number: 20220267626
    Abstract: In a resin for an active-energy-ray-curable ink containing a rosin-modified polyester resin, the rosin-modified polyester resin includes a reaction product of a material component containing rosins, a dibasic acid, and a polyol. The rosin-modified polyester resin has an ester bond in an amount of 5.20 mol/kg or more and 7.20 mol/kg or less. The rosin-modified polyester resin has an acid value of 1 mgKOH/g or more and 30 mgKOH/g or less. The rosin-modified polyester resin has a hydroxyl value of 1 mgKOH/g or more and 40 mgKOH/g or less.
    Type: Application
    Filed: March 22, 2021
    Publication date: August 25, 2022
    Applicant: Harima Chemicals, Incorporated
    Inventors: Keijiro OKAWACHI, Hironori MATSUSHIMA
  • Resin for active energy ray curable ink, composition for active energy ray curable ink, active energy ray curable ink, and cured film
    Patent number: 10669439
    Abstract: A resin for an active energy ray curable ink contains a rosin-modified unsaturated polyester resin (A). The rosin-modified unsaturated polyester resin (A) is a reaction product of a material component containing rosins (a), ?,?-unsaturated carboxylic acids (b), and polyols (c); the mole ratio of an unsaturated bond based on the ?,?-unsaturated carboxylic acids (b) with respect to the total amount of the material component is 0.50 mol/kg or more and 2.00 mol/kg or less; the rosins (a) contain a stabilization-treated rosin at a ratio of 90 mass % or more with respect to the total amount of the rosins (a); the ?,?-unsaturated carboxylic acids (b) contain ?,?-unsaturated dicarboxylic acids; and the polyols (c) contain a trihydric or more alcohol.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: June 2, 2020
    Assignee: HARIMA CHEMICALS, INCORPORATED
    Inventors: Keijiro Okawachi, Keiji Sasakura, Tomoya Tanatsugu, Hiroyuki Hisada, Akihiro Morita
  • Resin for Active Energy Ray Curable Ink, Composition for Active Energy Ray Curable Ink, Active Energy Ray Curable Ink, and Cured Film
    Publication number: 20190264044
    Abstract: A resin for an active energy ray curable ink contains a rosin-modified unsaturated polyester resin (A). The rosin-modified unsaturated polyester resin (A) is a reaction product of a material component containing rosins (a), ?,?-unsaturated carboxylic acids (b), and polyols (c); the mole ratio of an unsaturated bond based on the ?,?-unsaturated carboxylic acids (b) with respect to the total amount of the material component is 0.50 mol/kg or more and 2.00 mol/kg or less; the rosins (a) contain a stabilization-treated rosin at a ratio of 90 mass % or more with respect to the total amount of the rosins (a); the ?,?-unsaturated carboxylic acids (b) contain ?,?-unsaturated dicarboxylic acids; and the polyols (c) contain a trihydric or more alcohol.
    Type: Application
    Filed: July 13, 2017
    Publication date: August 29, 2019
    Applicant: Harima Chemicals, Incorporated
    Inventors: Keijiro Okawachi, Keiji Sasakura, Tomoya Tanatsugu, Hiroyuki Hisada, Akihiro Morita