Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1998-04-22
1999-10-26
Martin, Roland
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
G03G 9097
Patent
active
059725540
ABSTRACT:
A toner for developing electrostatic images is formed of toner particles comprising a binder resin and a colorant, and inorganic fine powder. The toner further contains: a phenol-aldehyde condensate mixture comprising an acyclic condensate and a cyclic condensate, respectively, of a phenol compound with an aldehyde compound, and the phenol-aldehyde condensate mixture contains 10-80 mol % of condensate components having 4-6 phenolic units. The phenol-aldehyde condensate mixture may be contained in or externally added to the toner particles. Because of the inclusion of an acyclic condensate and appropriate amount of condensate components having 4-6 phenolic units, the phenol-aldehyde condensate mixture may exhibit a good dispersibility in the binder resin and a good charge control performance.
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Database WPI, Section Ch, Week 9226, Derwent Publ., Class A05, AN 92-212167, XP 002095778 for JP 04-139456.
Nagatsuka Takayuki
Tanikawa Hirohide
Unno Makoto
Canon Kabushiki Kaisha
Martin Roland
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