Patents by Inventor Kentarou UEBA

Kentarou UEBA 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).

  • Method for producing modified polymer and hydrogenated product thereof
    Patent number: 9593192
    Abstract: A method for producing a modified polymer or a hydrogenated product thereof, includes polymerizing a monomer in a polymerization solvent which includes a hydrocarbon-based solvent, using a polymerization initiator to obtain a reaction solution. A functional group is introduced into the modified polymer or the hydrogenated product thereof, using a compound having the functional group protected with a silyl group. The reaction solution is separated into a solvent fraction including the hydrocarbon-based solvent, and a solid fraction including the modified polymer or the hydrogenated product thereof. The solvent fraction separated from the reaction solution is distilled to obtain a low-boiling fraction including the hydrocarbon-based solvent and a silanol compound. At least part of the silanol compound is removed from the low-boiling fraction by liquid-liquid extraction. At least part of a raffinate of the low-boiling fraction is recycled as a polymerization solvent.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: March 14, 2017
    Assignee: JSR CORPORATION
    Inventors: Kentarou Ueba, Sadataka Oota, Yoshirou Sakura
  • METHOD FOR PRODUCING MODIFIED POLYMER AND HYDROGENATED PRODUCT THEREOF
    Publication number: 20140275422
    Abstract: A method for producing a modified polymer or a hydrogenated product thereof, includes polymerizing a monomer in a polymerization solvent which includes a hydrocarbon-based solvent, using a polymerization initiator to obtain a reaction solution. A functional group is introduced into the modified polymer or the hydrogenated product thereof, using a compound having the functional group protected with a silyl group. The reaction solution is separated into a solvent fraction including the hydrocarbon-based solvent, and a solid fraction including the modified polymer or the hydrogenated product thereof. The solvent fraction separated from the reaction solution is distilled to obtain a low-boiling fraction including the hydrocarbon-based solvent and a silanol compound. At least part of the silanol compound is removed from the low-boiling fraction by liquid-liquid extraction. At least part of a raffinate of the low-boiling fraction is recycled as a polymerization solvent.
    Type: Application
    Filed: May 30, 2014
    Publication date: September 18, 2014
    Applicant: JSR CORPORATION
    Inventors: Kentarou UEBA, Sadataka OOTA, Yoshirou SAKURA