Toner for electrostatic-image development and process for producing the same
AssigneeFuji Xerox Co., Ltd.
InventorsTakeshi Agata, Takashi Imai
Life of this patent
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Abstract
A toner for electrostatic-image development comprising a core containing a binder resin and a colorant, and a shell covering said core, wherein the shell is formed by interfacial polymerization of a first reactant in an oily medium with a second reactant in an aqueous medium, and the colorant is a metallic lake pigment whose surface is treated with a coupling agent containing an amino group or a polyamine compound.
Claims20
A toner for electrostatic-image development comprising a core containing a binder resin and a colorant comprising a metallic lake pigment surface treated with a coupling agent containing an amino group or a polyamine compound, and a shell covering said core, wherein said shell is formed by interfacial polymerization of a first shell-forming reactant in an oily medium with a second shell-forming reactant in an aqueous medium.
A process for producing a toners for electrostatic-image development comprising a binder resin and a colorant, and a shell covering said core, comprising:
- treating a surface of a metallic lake pigment in an oily medium with a coupling agent containing an amino group or a polyamine compound;
- adding to said oily medium a binder resin and a first reactant necessary for interfacial polymerization;
- and dispersing the resulting oily mixture into an aqueous medium containing a second reactant necessary for interfacial polymerization to thereby polymerize the two reactants by interfacial polymerization.
A process for producing a toner for electrostatic-image development, comprising:
- dissolving or dispersing (a) a coupling agent containing an amino group or a polyamine compound, (b) a binder resin and (c) a colorant in a common solvent for dispersing (a), (b) and (c);
- adding to the dispersion a first shell-forming reactant for interfacial polymerization;
- mixing the resulting dispersion containing said first reactant with a second solvent containing a second shell-forming reactant for interfacial polymerization to form an O/W dispersion;
- and reacting said first reactant with said second reactant to form a shell and removing said common solvent.
Dependencies are inferred from the claim text.