External additive for toner and method for producing the same

Details External additive for toner and method for producing the same External additive for toner and method for producing the same

2007-01-25

2011-12-20

Choi, Ling (Department: 1761)

Radiation imagery chemistry: process, composition, or product th

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

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

C430S106100, C430S106300, C430S108100, C430S111300, C430S118800, C370S376000

Reexamination Certificate

active

08080357

ABSTRACT:
When being blended particularly in a color toner, a barium titanate external additive for toner enhances the toner fluidity, electrical properties, and other relevant performance; concurrently achieves high image density and reduced background fog in a color printer using the toner; and further retains high image quality even under a high-temperature high-humidity environment and a low-temperature low-humidity environment. An industrially advantageous producing method of the barium titanate external additive for toner is also provided. The external additive for toner of the present invention includes spherical barium titanate having undergone coating treatment with a hydrophobicizing agent.

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English Language Abstract of JP 2005-316226 A.
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U.S. Appl. No. 12/652,652 to Ochiai et al., I.A. filed Jan. 25, 2007 and entitled “External Additive for Toner and Method for Producing the Same”.

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