Powder-coated toner particles and method of making same

Details Powder-coated toner particles and method of making same Powder-coated toner particles and method of making same

2007-04-24

2007-04-24

Goodrow, John L (Department: 1756)

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

C430S110100, C430S111400, C430S137110

Reexamination Certificate

active

10830173

ABSTRACT:
A color toner composition for developing latent electrostatic images includes nanopowder-coated toner particles, the powder-coated toner particles being characterized in that each comprises a core toner particle having a volume average diameter, Dp, and the core toner particles have affixed to their surfaces a plurality of discrete colorant powder particles having a volume average diameter, dp, wherein the ratio of Dp/dpis at least about 5 and the weight fraction of colorant powder particles is at least about 0.01 based on the combined weight of core toner particles and colorant powder particles. Preferably, the weight fraction of colorant powder particles is from about 0.3 to about 3 times the product, (ρp/ρr) (d/r) (1+d/r)2, where ρpis the density of the colorant powder particles, ρrthe density of the core resin particles, d, the volumetric mean diameter of the colorant powder particles and r the volumetric mean radius of the toner core resin particles.

REFERENCES:
patent: 2297691 (1942-10-01), Carlson
patent: 4254201 (1981-03-01), Sawai et al.
patent: 4645727 (1987-02-01), Ong et al.
patent: 4778742 (1988-10-01), Ong et al.
patent: 4837107 (1989-06-01), Axelsson et al.
patent: 4935326 (1990-06-01), Creatura et al.
patent: 4937166 (1990-06-01), Creatura et al.
patent: 5102761 (1992-04-01), Ohsaki et al.
patent: 5200290 (1993-04-01), Ong et al.
patent: 5296325 (1994-03-01), Ohtsuka et al.
patent: 5352521 (1994-10-01), Hotta et al.
patent: 5437953 (1995-08-01), Russell et al.
patent: 5470687 (1995-11-01), Mayama et al.
patent: 5500321 (1996-03-01), Kasuya et al.
patent: 5916735 (1999-06-01), Nakashima et al.
patent: 6132919 (2000-10-01), Ogawa et al.
patent: 6268103 (2001-07-01), Hopper et al.
patent: 6416918 (2002-07-01), Matsumura et al.
Powder Technology Handbook, 2nd edition, Marcell Dekker Publications (1997), pp. 3-13, by K. Gotoh et al.

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