Title:
CHARGE CONTROL AGENT AND TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT CONTAINING SAME
Document Type and Number:
WIPO Patent Application WO/2012/118025
Kind Code:
A1
Abstract:
Provided is a charge control agent that applies a practical level of negative chargeability, is colorless or a light color and can be used in a color tonor, has an electrostatic charge from charging of a resin powder, such as the toner used, that is stable against environmental change, and has the characteristics of: excellent temporal stability of charge control characteristics, i.e., storage stability; excellent stability of charge control characteristics when repeatedly used a number of times, i.e., durability; and high stability without containing toxic heavy metals. The charge control agent comprises a phenol multimeric mixture containing a plurality of phenol multimeric types indicated by chemical formula (1) (wherein R1 and R2 are hydrogen atoms or alkyl groups, A is a 4-chlorophenol ring-containing group indicated by chemical formula (2) or (3) (wherein R3 and R4 are hydrogen atoms or alkyl groups and m is an integer between 0 and 2), and x is an integer between 16 and 28 in chemical formula (2) and a number in the range indicated by (14-2m)/(m+2)-(26-2m)/(m+2) in chemical formula (3)).
Inventors:
KURODA KAZUYOSHI (JP)
Application Number:
PCT/JP2012/054812
Publication Date:
September 07, 2012
Filing Date:
February 27, 2012
Export Citation:
Assignee:
ORIENT CHEMICAL IND CO LTD (JP)
KURODA KAZUYOSHI (JP)
KURODA KAZUYOSHI (JP)
International Classes:
G03G9/087; G03G9/097
Foreign References:
| JPH1115202A | 1999-01-22 | |||
| JPH04139456A | 1992-05-13 | |||
| JPH03237467A | 1991-10-23 | |||
| JPH02201378A | 1990-08-09 | |||
| JP2000162825A | 2000-06-16 | |||
| JPH1130880A | 1999-02-02 | |||
| JPH10153884A | 1998-06-09 |
Other References:
See also references of EP 2682817A4
Attorney, Agent or Firm:
KOMIYA, Yoshio et al. (JP)
Yoshio Komiya (JP)
Yoshio Komiya (JP)
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Claims: