Patents by Inventor Takuya KOSHIMA

Takuya KOSHIMA 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).

  • Electrophotographic toner binder, and toner composition
    Patent number: 11927914
    Abstract: The present invention provides an electrophotographic toner binder containing, as a main component, a polymer whose constituent monomer is a monomer having an ethylenically unsaturated bond, the electrophotographic toner binder being excellent in low-temperature fixability, hot-offset resistance, and storage stability. The present invention provides an electrophotographic toner binder containing a polymer (A) containing a monomer (a) and a monomer (x) different from the monomer (a) as essential constituent monomers, wherein the monomer (a) is a (meth)acrylate having a C18-C36 acyclic hydrocarbon group, the polymer (A) has an acid value of 40 or less, and the polymer (A) satisfies the following relational expression (1): 1.1 (cal/cm3)0.5?|SP(x)?SP(a)|?8.0 (cal/cm3)0.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: March 12, 2024
    Assignee: SANYO CHEMICAL INDUSTRIES, LTD.
    Inventor: Takuya Koshima
  • ELECTROPHOTOGRAPHIC TONER BINDER, AND TONER COMPOSITION
    Publication number: 20190310564
    Abstract: The present invention provides an electrophotographic toner binder containing, as a main component, a polymer whose constituent monomer is a monomer having an ethylenically unsaturated bond, the electrophotographic toner binder being excellent in low-temperature fixability, hot-offset resistance, and storage stability. The present invention provides an electrophotographic toner binder containing a polymer (A) containing a monomer (a) and a monomer (x) different from the monomer (a) as essential constituent monomers, wherein the monomer (a) is a (meth)acrylate having a C18-C36 acyclic hydrocarbon group, the polymer (A) has an acid value of 40 or less, and the polymer (A) satisfies the following relational expression (1): 1.1 (cal/cm3)0.5?|SP(x)?SP(a)|?8.0 (cal/cm3)0.
    Type: Application
    Filed: December 13, 2017
    Publication date: October 10, 2019
    Applicant: SANYO CHEMICAL INDUSTRIES, LTD.
    Inventor: Takuya KOSHIMA