Patent ID: 7718339
Filing Date: 2010-05-18
Classification: C08G,G03G

Abstract:
1. An electrostatic image developing toner comprising: a toner binder, a colorant, and a releasing agent, wherein the toner binder contains at least one noncrystalline polyester resin (A) and a crystalline polyester resin (B), and the at least one noncrystalline polyester resin (A) and/or the crystalline polyester resin (B) are/is formed in the presence of at least one titanium- containing catalyst (a) expressed by any one of General Formulas (I) and (II), where X is a residue resulting from removing a hydrogen atom in one hydroxyl group from mono-alkanolamine or poly-alkanolamine having 2 to 12 carbon atoms, a second hydroxyl group in the polyalkanolamine may be intramolecularly polycondensed with a third hydroxyl group directly bound to the same Ti atom to form a cyclic structure or may be intermolecularly polycondensed with a fourth hydroxyl group directly bound to other Ti atom to form a repeating structure; when the repeating structure is formed, the polymerization degree is 2 to 5; R represents an H atom or an alkyl group that has 1 to 8 carbon atoms and may contain 1 to 3 ether bonds; “m” is an integer of 1 to 4; “n” is an integer of 0 to 3; the sum of “m” and “n” is 4; “p” is an integer of 1 to 2; “q” is an integer of 0 to 1; the sum of “p” and “q” is 2; when “m” or “p” is 2 or more, each X may be the same or different, wherein the electrostatic image developing toner is used in an image forming apparatus which develops an electrostatic image on a latent image bearing member using the toner to form a toner image, transfers the toner image onto a transfer medium, and fixes the toner image on the transfer medium by heating and/or pressurizing the toner image.