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:
Apr. 06, 2021
Filed:
Jun. 12, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Hiroki Kagawa, Mishima, JP;
Shuntaro Watanabe, Hadano, JP;
Hiroki Akiyama, Suntou-gun, JP;
Tatsuya Saeki, Suntou-gun, JP;
Takashi Matsui, Mishima, JP;
CANON KABUSHIKI KAISHA, Toyko, JP;
Abstract
Provided is a magnetic toner having a toner particle containing a binder resin and a magnetic body, wherein the binder resin contains a polymer A having a first monomer unit and a second monomer unit, the first polymerizable monomer is at least one selected from the group consisting of the (meth)acrylic acid esters having Calkyl groups, a content of the first monomer unit and a content of the second monomer unit based on the total moles of all monomer units in the polymer A are respectively 5.0 to 60.0 mol % and 20.0 to 95.0 mol %, and assuming that an SP value of the first monomer unit and the second monomer unit are taken as SP(J/cm)and SP(J/cm), respectively, 3.00≤(SP−SP)≤25.00 is satisfied, and an oil absorption of the magnetic body is 5 to 40 ml/100 g.