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. 26, 2016
Filed:
Mar. 22, 2013
Mitsui Chemicals, Inc., Minato-ku, Tokyo, JP;
Kuniaki Kawabe, Chiba, JP;
Masakazu Tanaka, Ichihara, JP;
Hiroshi Matsuoka, Chiba, JP;
Noriko Kai, Otake, JP;
Keiichi Taki, Tokyo, JP;
MITSUI CHEMICALS, INC., Tokyo, JP;
Abstract
The present invention addresses the problem of providing an electrophotographic toner which has excellent storage property, is excellent in offset resistance and low-temperature fixing property during printing and has few substances causing staining with time, odor or dust inside a copy machine or a printer. The present invention relates to an electrophotographic toner characterized by containing an ethylene copolymer which comprises a constituent unit (a) derived from ethylene in an amount of 80 to 99.5% by mol and a constituent unit (b) derived from a cyclic olefin of 8 or more carbon atoms in an amount of 0.5 to 20% by mol [(a)+(b)=100% by mol] and satisfies the requirements: (i) the intrinsic viscosity [η] is in the range of 0.01 to 0.50 dl/g, and (ii) the crystallinity is in the range of 50 to 90%.