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:
Dec. 24, 2013
Filed:
Dec. 18, 2007
Hiroshi Matsuoka, Ichihara, JP;
Kazuya Sakata, Ichihara, JP;
Hiroyuki Takei, Kamagaya, JP;
Kenji Uchiyama, Odawara, JP;
Ichiro Sasaki, Chiba, JP;
Hiroshi Matsuoka, Ichihara, JP;
Kazuya Sakata, Ichihara, JP;
Hiroyuki Takei, Kamagaya, JP;
Kenji Uchiyama, Odawara, JP;
Ichiro Sasaki, Chiba, JP;
Mitsui Chemicals, Inc., Minato-Ku, Tokyo, JP;
Abstract
Disclosed is a toner for electrophotography containing at least a binder resin. This toner for electrophotography is characterized in that (a) the tetrahydrofuran (THF) soluble content in the toner has a first peak in the molecular weight region of not less than 2,000 but less than 5,000 and a second peak in the molecular weight region of not less than 100,000 but less than 200,000 in the chromatogram obtained by gel permeation chromatography (GPC); (b) the binder resin contains at least a carboxyl group-containing vinyl resin (C) and a glycidyl group-containing vinyl resin (E); and (c) the mass ratio of the styrene monomer to the acrylic monomer in the binder resin, namely (S/A), is not less than 4.6 but less than 8.5.