Patents by Inventor Erika NOBUKUNI

Erika NOBUKUNI 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).

  • Polyether polyol production method and polyurethane foam production method
    Patent number: 11414514
    Abstract: The present invention aims to provide a method of producing a polyether polyol having a low aldehyde content, the method including simpler steps; and a method of producing polyurethane foam having a reduced amount of aldehyde volatilization. The present invention provides a method of producing a polyether polyol (F) including step (1) of obtaining a crude polyether polyol composition (D2) having a pH higher than 5.0 by contact of a crude polyether polyol composition (D1) containing a polyether polyol (A) with an acid catalyst (B) in the presence of water, the polyether polyol (A) being obtainable by ring-opening polymerization of an alkylene oxide with an active hydrogen compound; and step (2) of removing a volatile component containing an aldehyde (C) after step (1).
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: August 16, 2022
    Assignee: SANYO CHEMICAL INDUSTRIES, LTD.
    Inventors: Erika Nobukuni, Takashi Yabuta
  • POLYETHER POLYOL PRODUCTION METHOD AND POLYURETHANE FOAM PRODUCTION METHOD
    Publication number: 20190309120
    Abstract: The present invention aims to provide a method of producing a polyether polyol having a low aldehyde content, the method including simpler steps; and a method of producing polyurethane foam having a reduced amount of aldehyde volatilization. The present invention provides a method of producing a polyether polyol (F) including step (1) of obtaining a crude polyether polyol composition (D2) having a pH higher than 5.0 by contact of a crude polyether polyol composition (D1) containing a polyether polyol (A) with an acid catalyst (B) in the presence of water, the polyether polyol (A) being obtainable by ring-opening polymerization of an alkylene oxide with an active hydrogen compound; and step (2) of removing a volatile component containing an aldehyde (C) after step (1).
    Type: Application
    Filed: December 28, 2017
    Publication date: October 10, 2019
    Applicant: SANYO CHEMICAL INDUSTRIES, LTD.
    Inventors: Erika NOBUKUNI, Takashi YABUTA