Title:
ELECTROPHOTOGRAPHIC BLACK TONER
Document Type and Number:
Japanese Patent JP3174956
Kind Code:
B2
Abstract:
PURPOSE: To obtain black toner excellent in spectral reflection characteristics and electrification property which gives good black picture images by incorporating a specified pigment and a specified compd.
CONSTITUTION: The toner contains at least three kinds of compds. selected from phthalocyanine blue pigment, disazo yellow pigment, azo red pigment and quinacridone red pigment and contains a compd. expressed by formula I. The amt. of the pigment and the compd. of formula I is 2-20 pts.wt., preferably 3-15 pts.wt. to 100 pts.wt. of the binder resin. The add amt. of the compd. of formula I is ≤5 pts.wt., preferably 0.1-3 pts.wt. to 100 pts.wt. of the binder resin. The binder resin is preferably styrene-acrylate resin, styrene-methacrylate resin, or polyester resin. Thereby, the obtd. black toner can reflect or transmit near infrared light with high sensitivity.
Inventors:
Hiroyuki Kobayashi
Application Number:
JP20610791A
Publication Date:
June 11, 2001
Filing Date:
July 24, 1991
Export Citation:
Assignee:
Canon Inc
International Classes:
G03G9/09; (IPC1-7): G03G9/09
Domestic Patent References:
| JP315077A | ||||
| JP3168757A | ||||
| JP3168755A | ||||
| JP353262A | ||||
| JP57119363A | ||||
| JP3220567A |
Attorney, Agent or Firm:
Yoshio Toyota (1 outside)
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