Toner

Patent metadata

Field	Value
Publication number	US-9223240-B2
Application number	US-201214343662-A
Country	US
Kind code	B2
Filing date	Sep 5, 2012
Priority date	Sep 9, 2011
Publication date	Dec 29, 2015
Grant date	Dec 29, 2015

Abstract

Since a charge amount of a toner and a charge rise characteristic thereof are liable to be influenced by the change in temperature and humidity condition, the change in image density occurs in printing, and in particular, in high temperature and high humidity environment, inconveniences, such as image fogging, occur due to non-uniformity of the charge amount distribution. In a toner including toner particles obtained by dispersing a monomer composition containing a polymerizable monomer and a colorant in an aqueous medium to form droplets and polymerizing the polymerizable monomer in the droplets, the toner particles contain a polymer formed by a polymerization reaction of the polymerizable monomer and a metal compound having a vinyl group.

First claim

The invention claimed is:

1. A toner comprising:
toner particles which are produced by a process including the steps of dispersing a monomer composition containing a polymerizable monomer and a pigment in an aqueous medium to form droplets and polymerizing the polymerizable monomer in the droplets,
wherein each of the toner particles contains a polymer formed by a polymerization reaction of the polymerizable monomer and a metal compound having a vinyl group, and
the metal compound having a vinyl group is a compound having a structure in which a site derived from —COOM 1 and/or —OH of a salicylic acid portion or a salicylic acid derivative portion of an aromatic compound represented by the following formula (1) is bonded to a metal

where, in the formula, R 1 represents a hydroxyl group, a carboxyl group, an alkyl group having 1 to 18 carbon atoms, or an alkoxy group having 1 to 18 carbon atoms,
R 2 represents a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atoms, or an alkoxy group having 1 to 18 carbon atoms,
R 3 represents a hydrogen atom or a methyl group,
m is an integer of 1 to 3,
n is an integer of 0 to 3 in which when n is 2 or 3, each R 1 is independently selected, and
M 1 represents a hydrogen atom, an alkali metal, NH 4 , or a mixture thereof.

2. The toner according to claim 1 , wherein the metal compound having a vinyl group includes a metal, and the metal is Zn, Al, Si, B, Fe, Cr, or Zr.

3. The toner according to claim 1 , wherein the metal compound having a vinyl group includes a metal, and the metal is Zn, Al, or Cr.

4. The toner according to claim 1 , wherein a metal derived from the metal compound having a vinyl group is present in an amount of 1.00 to 100 μmol with respect to 1 g of the toner.

5. The toner according to claim 1 ,
further comprising a polymer having a structure B represented by formula (21)

wherein, in the formula, R 13 represents hydrogen or an alkyl group having 1 to 12 carbon atoms,
B 1 represents a substituted or unsubstituted alkylene structure having 1 or 2 carbon atoms, a substituted or unsubstituted phenylene structure, or a substituted or unsubstituted naphthylene structure,
the substitute of the alkylene structure is a hydroxyl group, an alkyl group having 1 to 12 carbon atoms, a phenyl group, a naphthyl group, or an alkoxy group having 1 to 12 carbon atoms,
the substitutes of the phenylene structure and the naphthylene structure are each a hydroxyl group, an alkyl group having 1 to 12 carbon atoms, or an alkoxy group having 1 to 12 carbon atoms, and
* represents a bonding position to a main chain of the polymer.

Assignees

• Kenmoku Takashi
• Itabashi Hitoshi
• Masumoto Akane
• Canon Kk

Inventors

• Kenmoku Takashi
• Itabashi Hitoshi
• Masumoto Akane

Classifications

• G03G9/08791

  characterised by the presence of specified groups or side chains · CPC title

• G03G9/08706

  Polymers of alkenyl-aromatic compounds · CPC title

• G03G9/08797

  characterised by their physical properties, e.g. viscosity, solubility, melting temperature, softening temperature, glass transition temperature · CPC title

• G03G9/08795

  characterised by their chemical properties, e.g. acidity, molecular weight, sensitivity to reactants · CPC title

• G03G9/08722

  Polyvinylalcohols; Polyallylalcohols; Polyvinylethers; Polyvinylaldehydes; Polyvinylketones; Polyvinylketals · CPC title