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Yukinobu Hasegawa, Hiroyoshi Shimomura, Koichi Murai, Masatoshi Maruyama, Toyokichi Tange: Toner for developing an electrostatically charged image. Nippon Carbide Kogyo Kabushiki Kaisha, Sherman & Shalloway, February 26, 1991: US04996127 (138 worldwide citation)

This invention provides a toner composed of associated particles of secondary particles comprising primary particles of a polymer having an acidic or basic polar group and particles of a coloring agent and optionally a charge controlling agent and a process for producing the toner. Preferably, the c ...


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