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:
Jun. 09, 2015
Filed:
Oct. 06, 2011
Takashi Akutagawa, Kyoto, JP;
Masakazu Iwata, Kyoto, JP;
Masaru Honda, Kyoto, JP;
Tomoyuki Ariyoshi, Kyoto, JP;
Takashi Akutagawa, Kyoto, JP;
Masakazu Iwata, Kyoto, JP;
Masaru Honda, Kyoto, JP;
Tomoyuki Ariyoshi, Kyoto, JP;
Sanyo Chemical Industries, Ltd., Kyoto, JP;
Abstract
Provided is a toner binder which combines excellent low-temperature fixing properties and excellent hot-offset resistance (namely which permits a wide fixing-temperature range) and which exhibits excellent storage stability. The toner binder comprises (A) a polyester resin, (B) a specific crystalline resin and, if necessary, (C) a non-crystalline linear polyester resin. The polyester resin (A) comprises a carboxylic acid component (x) and a polyol component (y) as the essential constituent units, said component (x) comprising two or more kinds of dicarboxylic acids (x1) selected from among aromatic dicarboxylic acids and ester-forming derivatives thereof in a total amount of 80 mol % or more and further containing an at least trivalent polycarboxylic acid (x2) as another essential component, and said component (y) comprising a C2-10 aliphatic diol (y1) in an amount of 50 mol % or more. Further, the polyester resin (A) exhibits a storage modulus at 150° C. [G'(150)] of 2000 Pa or more, and the [G′(150)] and [G′(180)] (storage modulus at 180° C.) of the resin (A) satisfy a specific relationship.