Toner for the development of electrostatic image and method for producing the same
AssigneeMitsubishi Chemical Corporation
InventorsKazuo Mitsuhashi, Osamu Ando, Noriaki Takahashi, Tomoko Ishikawa, Yuqing Xu
Life of this patent
Estimating the term…
Abstract
A toner is provided for the development of an electrostatic image which includes an agglomerate of particles obtained by agglomerating at least primary polymer particles and primary colorant particles, wherein the toner has a THF insoluble content of from 15% to 80% and the toner further includes a wax having a melting point of 30 to 100° C., and the method for producing the same.
Claims119
A toner, comprising:
- an agglomerate of particles obtained by agglomerating a mixture comprising primary polymer particles and primary colorant particles;
- wherein the toner has a THF insoluble content of from 15% to 80% by weight;
- wherein the toner comprises a wax having a melting point of 30 to 100° C.;
- wherein a THF insoluble content of the primary polymer particles is from 15% to 70% by weight;
- wherein the primary polymer particles comprise units obtained from 0.5 to 5% by weight of acrylic acid or methacrylic acid, based on a total amount of said primary polymer particles.
The toner as claimed in claim 17, wherein the primary polymer particles comprise a polyfunctional monomer in an amount of from 0.005 to 5% by weight and the particulate resin comprises a polyfunctional monomer in an amount of from 0.005 to 5% by weight.
A toner, comprising:
- an agglomerate of particles obtained by agglomerating a mixture comprising primary polymer particles and primary colorant particles;
- wherein said primary polymer particles comprise units obtained from one or more monomers and a polyfunctional monomer;
- wherein said polyfunctional monomer is present in an amount of from 0.005 to 5% by weight;
- wherein the toner comprises wax having a melting point of 30 to 100° C.;
- wherein a THF insoluble content of the primary polymer particles is from 15% to 70% by weight;
- wherein the primary polymer particles comprise units obtained from 0.5 to 5% by weight of acrylic acid or methacrylic acid, based on a total amount of said primary polymer particles.
A method for producing a toner, comprising:
- agglomerating at least primary polymer particles and primary colorant particles to form an agglomerate of particles;
- aging the agglomerate of particles at a temperature equal to or greater than Tg of the primary polymer particles;
- and
- coating at least a substantial portion of the surface of the agglomerate of particles with a particulate resin;
- wherein the primary polymer particles are produced by emulsion polymerization of a monomer mixture comprising 0.005 to 5% by weight of a polyfunctional monomer, and the toner comprises wax having a melting point of 30 to 100° C.
A method for producing a toner comprising agglomerating a mixture of at least primary polymer particles and primary colorant particles to form an agglomerate of particles, and coating at least a substantial portion of the surface of said agglomerate of particles with a particulate resin, wherein the primary polymer particles are produced by seed emulsion polymerization of a monomer mixture substantially free of a polyfunctional monomer, in the presence of a particulate wax having a melting point of 30 to 100° C., and the particulate resin is obtained by emulsion polymerization of a monomer mixture comprising 0.005 to 5% by weight of a polyfunctional monomer.
A toner, comprising:
- an agglomerate of particles obtained by agglomerating a mixture comprising primary polymer particles and primary colorant particles;
- wherein the toner has a THF insoluble content of from 20% to 70% by weight;
- wherein the toner comprises a wax having a melting point of 30 to 100° C.;
- wherein the primary polymer particles comprise units obtained from 0.5 to 5% by weight of acrylic acid or methacrylic acid, based on a total amount of said primary polymer particles.
A toner, comprising:
- an agglomerate of particles obtained by agglomerating a mixture comprising primary polymer particles and primary colorant particles;
- wherein the toner has a THF insoluble content of from 15% to 80% by weight;
- wherein the toner comprises a wax having a melting point of 30 to 100° C.;
- wherein the toner has a ratio of volume-average particle diameter and number-average particle diameter (volume-average particle diameter/number-average particle diameter) of from 1 to 1.25;
- wherein the toner has a volume-average particle diameter of from 7 to 10 μm, and 10% b volume or less of the toner has a particle diameter of 5 μm or less.
A method for producing a toner, comprising:
- agglomerating at least primary polymer particles and primary colorant particles to form an agglomerate of particles;
- and
- coating at least a substantial portion of the surface of the agglomerate of particles with a particulate resin;
- wherein the toner comprises wax having a melting point of 30 to 100° C.;
- and
- wherein the primary polymer particles are produced by seed emulsion polymerization of a monomer mixture comprising 0.005 to 5% by weight of a polyfunctional monomer in the presence of a particulate wax having a melting point of 30 to 100° C.
Dependencies are inferred from the claim text.