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AssigneeCanon Kabushiki Kaisha
InventorsJunichi Sakai, Masaaki Hiro, Hideyuki Takai, Keishi Danjo, Makiko Endo
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The invention provides colored fine resin particles useful as coloring materials for inks which can provide images having good water fastness, weather fastness and rub-off resistance and are excellent in dispersion stability, and a production process thereof. The colored fine resin particles have a structure in which a pigment coated with a water-insoluble resin is encapsulated with a copolymer composed of at least a polymerizable unsaturated monomer and a reactive emulsifier.
Colored fine resin particles having an average particle diameter of 500 nm or smaller and having a structure in which a pigment coated with a water-insoluble resin is encapsulated with a copolymer composed of at least a polymerizable unsaturated monomer and a reactive emulsifier.
A process for producing colored fine resin particles having an average particle diameter of 500 nm or smaller, which comprises the steps of emulsifying a pigment coated with a water-insoluble resin, a polymerizable unsaturated monomer, a reactive emulsifier and a polymerization initiator in an aqueous medium, and polymerizing the polymerizable unsaturated monomer.
An aqueous dispersion of colored fine resin particles, wherein the colored fine resin particles have an average particle diameter of 500 nm or smaller and have a structure in which a pigment coated with a water-insoluble resin is encapsulated with a copolymer composed of at least a polymerizable unsaturated monomer and a reactive emulsifier, and are in a dispersed state.
A process for producing colored fine resin particles having an average particle diameter of 500 nm or smaller, which comprises the steps of emulsifying at least a polymerizable unsaturated monomer, a colorant, an emulsifier and a polymerization initiator in an aqueous medium and polymerizing the polymerizable unsaturated monomer, wherein the colorant is a pigment, and wherein a phase-inversion emulsification method is used in the emulsifying step.
A process for producing an aqueous dispersion of colored fine resin particles having an average particle diameter of 500 nm or smaller, which comprises the steps of emulsifying at least a polymerizable unsaturated monomer, a pigment as a colorant, an emulsifier and a polymerization initiator in an aqueous medium and polymerizing the polymerizable unsaturated monomer, wherein a phase-inversion emulsification method is used in the emulsifying step.
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