Color toner for developing electrostatic latent image

Details Color toner for developing electrostatic latent image Color toner for developing electrostatic latent image

2011-03-15

2011-03-15

Chapman, Mark A (Department: 1721)

Radiation imagery chemistry: process, composition, or product th

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

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

C430S108240, C430S111400

Reexamination Certificate

active

07906263

ABSTRACT:
The color toner for developing electrostatic latent images comprising a colored resin particle containing at least a binder resin, a colorant, a charge control agent and a parting agent, wherein an extracted liquid with water by means of a hot water extraction method from said colorant has a pH value in the range from 6.0 to 8.0, said colored resin particle has a volume average particle diameter (Dv) in the range from 4 to 10 μm and an average circularity in the range from 0.93 to 0.995, an amount of extracted components with methanol is 7% by weight or less, and an amount of residual volatile compounds is 500 ppm or less. The color toner for developing electrostatic latent images has excellent image-reproducibility and environmental durability and can form an image with a stable image density under a high temperature and high humidity condition.

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Sanyo Organic Pigments; Sanyo Color Works, Ltd.; Sanyo Color Series No. 244; pp. 3-14.
Japanese Notification of Reasons for Refusal, issued May 18, 2010 for corresponding Japanese Patent Application No. 2006-511182.

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