Abstract: A negatively charged polymerized toner having high charging performance, which comprises a charge control agent particularly useful for color toners and polymerized toners, the charge control agent comprising a cyclic phenol sulfide as an active ingredient, which speeds up charging risetime, has a high charge amount and charging characteristics particularly excellent in environmental stability, and is safe since it does not have any problem with the waste regulations.

Abstract: A toner composition, comprising an organometal complex compound having the formula (1), which has an electroconductivity of at most 110 &mgr;S/cm when dispersed in ion-exchanged water in an amount of 1 wt %: wherein Ar is an aryl group selected from the group consisting of a substituted or unsubstituted phenyl group and a substituted or unsubstituted naphthyl group, X and Y are —S—, —O—, —CO—, —COO—, —NH— or —NR—, wherein R is C1-4 alkyl; K+ is hydrogen ion, lithium ion, sodium ion, potassium ion, ammonium ion, organoammonium or a mixture thereof; m is the number of azo compound groups coordinated to Fe and is 1, 2, 3 or 6; p is the valence of Fe; n is 1, 2 or 4; and q is 0 or an integer, as a component of an electrostatic image developing non-magnetic toner.

Abstract: The present invention relates to a novel zirconium compound which is useful as a charge control agent for an electrophotographic toner. Further, it relates to an electrophotographic toner which contains said zirconium compound as a charge control agent.

Abstract: The present invention relates to a novel zirconium compound which is useful as a charge control agent for an electrophotographic toner. Further, it relates to an electrophotographic toner which contains said zirconium compound as a charge control agent.

Abstract: An electrostatic image developing toner to be used for an image forming method wherein in an electrophotographic process of forming an electrostatic latent image on a photoreceptor made of an inorganic or organic material, developing it with a toner, transferring it to a paper sheet, a plastic film or the like, and fixing it to form a visible image, the toner remaining on the photoreceptor after the transfer, is recovered, and the recovered toner is reused in the development process, said electrostatic image developing toner comprising at least a binder resin, a colorant and a charge control agent, wherein the charge control agent is represented by the following formula (1); 1

Abstract: A organic metal complex compound represented by the following formula (1), which has an electroconductivity of at most 110 &mgr;S/cm when dispersed in ion-exchanged water in an amount of 1 wt %: 1

Abstract: The present invention relates to an electrophotographic toner containing a binder resin having an acid value in the range of from 0.1 to 50 and a novel compound of zirconium complex or salt useful as a charge control agent for the electrophotographic toner.