Patents by Inventor Masaru Wakizaka

Masaru Wakizaka 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).

  • Process for producing resin microparticles for a toner raw material
    Patent number: 8247153
    Abstract: An object of the present invention is to provide a resin microparticle for a toner raw material that has a small particle diameter and a narrow particle diameter distribution and has a low odor. There are provided a resin microparticle for a toner raw material characterized in that all of the following requirements (i) to (iii) are satisfied: Requirement (i): A particle diameter of 50% volume (D50) satisfies the relationship 0.05 ?m?D50?1 ?m; Requirement (ii): A particle diameter of 10% volume (D10) and a particle diameter of 90% volume (D90) satisfy the relationship D90/D10?7; and Requirement (iii): The content of an organic solvent is not more than 70 ppm.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: August 21, 2012
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Hiroshi Matsuoka, Ichirou Sasaki, Toshimitsu Narutaki, Masaru Wakizaka, Hiroyuki Takei
  • Process for Producing Resin Microparticles for a Toner Raw Material
    Publication number: 20090020900
    Abstract: An object of the present invention is to provide a resin microparticle for a toner raw material that has a small particle diameter and a narrow particle diameter distribution and has a low odor. There are provided a resin microparticle for a toner raw material characterized in that all of the following requirements (i) to (iii) are satisfied: Requirement (i): A particle diameter of 50% volume (D50) satisfies the relationship 0.05 ?m?D50?1 ?m; Requirement (ii): A particle diameter of 10% volume (D10) and a particle diameter of 90% volume (D90) satisfy the relationship D90/D10?7; and Requirement (iii): The content of an organic solvent is not more than 70 ppm.
    Type: Application
    Filed: September 23, 2008
    Publication date: January 22, 2009
    Applicant: Mitsui Chemicals, Inc.
    Inventors: Hiroshi Matsuoka, Ichirou Sasaki, Toshimitsu Narutaki, Masaru Wakizaka, Hiroyuki Takei
  • Resin microparticle as raw material for toner, aqueous dispersed system thereof and toner
    Publication number: 20070082285
    Abstract: A resin microparticle for a toner raw material that has a small particle diameter and a narrow particle diameter distribution and has a low odor is provided. The resin microparticle for a toner raw material has the following requirements (i) to (iii) satisfied: Requirement (i): A particle diameter of 50% volume (D50) satisfies the relationship 0.05 ?m?D50?1 ?m; Requirement (ii): A particle diameter of 10% volume (D10) and a particle diameter of 90% volume (D90) satisfy the relationship D90/D10?7; and Requirement (iii): The content of an organic solvent is not more than 70 ppm.
    Type: Application
    Filed: October 18, 2004
    Publication date: April 12, 2007
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Hiroshi Matsuoka, Ichirou Sasaki, Toshimitsu Narutaki, Masaru Wakizaka, Hiroyuki Takei
  • Epoxy resin reacted with primary amine active hydrogen compound and esterifying agent to yield polyol resin
    Patent number: 5268435
    Abstract: A polyol resin substantially free of epoxy groups is useful as a coating material and is prepared by(i) reacting a bisphenol epoxy resin with a compound having one active hydrogen per molecule and optionally a bisphenol to form a polyol resin having secondary hydroxyl groups, and(ii) esterifying part of the secondary hydroxyl groups with a lactone or a monocarboxylic acid (ester) to form a polyol resin with graft-polymerized polyester moieties.
    Type: Grant
    Filed: June 12, 1991
    Date of Patent: December 7, 1993
    Assignees: Mitsui Petrochemical Industries, Ltd., Ricoh Company, Ltd.
    Inventors: Hideo Nakamura, Masaru Wakizaka, Yohzoh Yamamoto
  • Epoxy resin reacted with primary amine, active hydrogen compound and esterifying agent to yield polyol resin
    Patent number: 5043387
    Abstract: There is provided a process for preparing a novel polyol resin which does not substantially contain epoxy group wherein a bisphenol type epoxy resin (a) is subjected to the following steps (i), (ii) or (i), (iii) and (ii) in an optional sequence:(i) the step wherein epoxy group is reacted with a compound having one active hydrogen in its molecule (c), and(ii) the step wherein secondary hydroxyl group is at least partly esterified.(iii) the step wherein epoxy group is reacted with primary amine (b).
    Type: Grant
    Filed: April 4, 1989
    Date of Patent: August 27, 1991
    Assignees: Mitsui Petrochemical Industries, Ltd., Ricoh Company, Ltd.
    Inventors: Hideo Nakamura, Masaru Wakizaka, Yohzoh Yamamoto
  • Lactone-primary amine modified epoxy resin and process for preparing the same
    Patent number: 5037899
    Abstract: A modified epoxy resin provided with improved flexibility and curing properties is prepared by subjecting a bisphenol type epoxy resin (a) to steps (i) and (ii):(i) the step wherein the epoxy group is reacted with a primary amine (b), and(ii) the step wherein secondary hydroxyl group is at least partly esterified by a reaction with a lactone.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: August 6, 1991
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Hideo Nakamura, Masaru Wakizaka, Michio Hashimoto, Yohzoh Yamamoto