The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 22, 2020
Filed:
Jul. 18, 2017
Kao Corporation, Tokyo, JP;
Eiji Shirai, Wakayama, JP;
Tomohide Yoshida, Wakayama, JP;
KAO CORPORATION, Tokyo, JP;
Abstract
The present invention relates to a binder resin composition for toners for development of electrostatic images capable of giving a toner excellent in fusing properties on PP films, a toner for development of electrostatic images containing the binder resin composition, a printing method using the toner, and a printed material. [1] A binder resin composition for toners for development of electrostatic images, including a polyester-based resin and polyolefin particles, wherein the polyolefin particles contain a polymer having a polymer skeleton of olefin having 2 or more and 3 or less carbon atoms, the volume median diameter (D) of a small particle size component, as measured according to a dynamic light scattering method using a dispersion S of a small particle size component obtainable according to Methods 1 and 2, is 20 nm or more and 400 nm or less, the content of a large particle size component obtainable according to Method 2 is 0% by mass or more and 30% by mass or less relative to the total amount of the large particle size component and the small particle size component, and the content of the small particle size component is 70% by mass or more and 100% by mass or less relative to the total amount of the large particle size component and the small particle size component, and the melting endothermic energy amount of the small particle size component is 3 J/g or more and 10 J/g or less; [2] a toner for development of electrostatic images including the binder resin composition for toners for development of electrostatic images according to the above [1] in an amount of 20% by mass or more and 100% by mass or less in the binder resin therein, and including a releasing agent having a melting point of 60° C. or higher and 100° C. or lower in an amount of 1 part by mass or more and 10 parts by mass or less relative to 100 parts by mass of the binder resin; [3] a printing method including printing on a plastic film according to an electrophotographic method with the toner for development of electrostatic images according to the above [2]; and [4] a printed material obtainable according to the method of the above [3].