Cyan toner containing compound having azo skeleton

A technology of cyan toner and toner, applied in the field of cyan toner, which can solve the problems of reduced coloring ability and insufficient dispersibility of toner, and achieve fog suppression, high transfer efficiency, and high tinting strength Effect

Inactive Publication Date: 2014-11-05
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Insufficient dispersibility of pigments in toner particles leads to reduction of toner coloring ability

Method used

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  • Cyan toner containing compound having azo skeleton
  • Cyan toner containing compound having azo skeleton
  • Cyan toner containing compound having azo skeleton

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0219] A compound having an azo skeleton structure is obtained by the following method.

[0220]

[0221] Compound (101) having an azo skeleton structure was produced according to the following scheme.

[0222]

[0223] [wherein, "co" means a symbol indicating that the arrangement of monomer units forming a copolymer is random].

[0224] First, 3.00 parts of compound (22) were added to 30 parts of chloroform, and cooled to 10° C. or less with ice. Then, 2.71 parts of compound (23) were added. Subsequently, the solution was stirred at 65°C for 2 hours. After the reaction was completed, the reaction product was extracted with chloroform and concentrated to obtain 5.43 parts of compound (24) (yield 95.2%).

[0225] Next, 30.0 parts of water and 11.0 parts of concentrated hydrochloric acid were added to 5.00 parts of compound (25), and the solution was cooled to 10° C. or lower with ice. 3.46 parts of sodium nitrite added to 8.10 parts of water were dissolved in the solut...

Embodiment 2

[0378] First, for use in the toner production step according to the suspension polymerization method, a pigment dispersion liquid containing a phthalocyanine pigment and a compound having an azo skeleton structure is produced by the following method.

preparation example 1

[0380] 18.0 parts of C.I. Pigment Blue 15:3 represented by formula (21) as a colorant, 1.8 parts of a compound (150) with an azo skeleton structure, 180 parts of styrene as a water-insoluble solvent, and 130 parts of glass beads ( diameter 1mm) mixed. Using an attritor (manufactured by NIPPON COKE & ENGINEERING.CO., LTD.), the mixture was dispersed for 3 hours. The mixture was filtered with a mesh to obtain a pigment dispersion (DIS1).

[0381]

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Abstract

An object of the present invention is to provide a cyan toner having a high coloring ability, enabling suppression of fogging, and having high transfer efficiency. The object can be attained by a toner including toner particles containing a binder resin, a compound having a polymeric portion bound to an azo skeleton, and a phthalocyanine pigment as a colorant.

Description

technical field [0001] The present invention relates to a cyan toner comprising a compound having an azo skeleton structure as a dispersant for a phthalocyanine pigment and used for electrophotography, electrostatic recording, electrostatic printing or toner jet recording. Background technique [0002] Insufficient dispersibility of the pigment in toner particles results in a decrease in the coloring ability of the toner. Therefore, techniques for dispersing pigments by various methods have been developed. [0003] As a technique for dispersing a phthalocyanine pigment in toner particles, PTL 1 discloses an example in which a polymer containing sodium styrene sulfonate used as a monomer unit is used as a dispersant. [0004] Another example of the technique proposes a method in which a metal-containing phthalocyanine and a polymer having a substituent capable of coordinating with the metal-containing phthalocyanine (hereinafter, also referred to as a coordination polymer) c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/09C08F20/54C09B67/20C09B67/46C09B69/10G03G9/08G03G9/087C09B47/04C09B47/20C08F8/30C08F12/08C08F20/06C08F20/10
CPCG03G9/0806C08F20/06C08F20/54C09B69/106G03G9/08791C09B69/10C09B31/10C09B47/04C09B67/0002C09B67/0041C08F212/08G03G9/08795G03G9/09C09B29/337C08F12/08G03G9/08G03G9/08704C09B67/009C08F2438/01G03G9/091C09B69/00C09B47/20G03G9/0918C09B35/033G03G9/087C08F20/10C09B31/11C08F8/30C09D7/41C08F2/38C08F12/28C08F220/1804C08F220/06C08F220/603C08F220/1818C08F220/58C08F220/36C08F220/54C08F220/14C09B67/002
Inventor 西浦千晶村井康亮长谷川由纪长谷川和香河村政志渡部大辉关真范增田彩乃丰田隆之广濑雅史
Owner CANON KK
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