Patent ID: 6218065
Filing Date: 2001-04-17
Classification: G03G

Abstract:
A toner having a negative triboelectric chargeability, comprising at least a binder resin, a colorant and an organic metal compound,wherein the organic metal compound is an organic zirconium compound having a structure represented by any one of the following formulae (1), (2), (32) and (33): ##STR31##wherein Ar denotes a benzene ring, naphthalene ring, anthracene ring or phenanthrene ring capable of having a substituent of alkyl, hydroxyl or carboxyl; X and Y independently denote O or --CO--O--; L denotes a neutral ligand of water, alcohol, ammonia, alkylamine or pyridine; C1 denotes a monovalent cation of hydrogen ion, monovalent metal ion, ammonium ion or alkylammonium ion; C2 denotes a divalent cation of a metal ion; n is 2, 3 or 4; m is 0, 2 or 4; a number (n) of ligands can be identical to or different from each other, and a number (m>0) of neutral ligands can be identical to or different from each other in each complex or complex salt of a formula; with the proviso that each complex or complex salt of a formula can also be a mixture of complex compounds having mutually different n or/and m, or a mixture of complex salts having mutually different counter ions C1 or/and C2, ##STR32##wherein Ar denotes a benzene ring, naphthalene ring, anthracene ring or phenanthrene ring capable of having a substituent of alkyl, hydroxyl or carboxyl; X and Y independently denote O or --CO--O--; L denotes a neutral ligand of water, alcohol, ammonia, alkylamine or pyridine; A denotes an anion of halogen, hydroxyl, carboxylate, carbonate, nitrate, sulfate, cyano or thiocyano, a plurality of A can be identical or different when k.gtoreq.2; C1 denotes a monovalent cation of hydrogen ion, monovalent metal ion, ammonium ion or alkylammonium ion; C2 denotes a divalent cation of a metal ion; n is 1, 2, 3 or 4; m is 0, 1, 2, 3 or 4; k is 1, 2, 3, 4, 5 or 6; a number (when n.gtoreq.2) of ligands can be identical to or different from each other, and a number (m.gtoreq.2) of neutral ligands can be identical to or different from each other in each complex or complex salt of a formula; with the proviso that each complex or complex salt of a formula can also be a mixture of complex compounds having mutually different n or/and m, or a mixture of complex salts having mutually different counter ions C.sub.1 or/and C2;(Ar--COO.sup.-).sub.n Ar.sup.4.sym.(4-n)A.sub.1.crclbar. or (2-n/2)A.sub.2.sup.2.crclbar. (32)(Ar--COO.sup.-).sub.n Ar.sup.4.sym.(O)(2-n)A.sub.1.sup..sym. (33),wherein Ar denotes a benzene ring, naphthalene ring, anthracene ring or phenanthrene ring capable of having a substituent of alkyl, hydroxyl, acyloxy or carboxyl; A.sub.1 denotes a monovalent anion of halogen, hydroxyl, nitrate or carboxylate; A.sub.2 denotes a divalent anion, and n is 1, 2, 3 or 4 with the proviso that in case of n.gtoreq.2 for each metal salt, a plurality (n) of aromatic carboxylates and aromatic hydroxycarboxylates as acid ions may be identical or different, and that each metal salt of a formula can be a mixture of different salts having different numbers of n.