| 摘要 |
PROBLEM TO BE SOLVED: To provide a toner and a developer for electrostatically charged image development, which are excellent in an electrostatic charging property, an image, low-temperature fixing property, offset resistance, and blocking resistance and also have excellent preventiveness against curling and excellent dispersion of a releasing agent, and a releasing agent containing urethane modified polyester resin used for the toner and developer for electrostatically charged image development. SOLUTION: The releasing agent containing urethane modified polyester resin for toner is obtained by adding a propylene homopolymer of 1,500 to 3,000 in number average molecular weight (Mn) measured by gel permeation chromatography (GPC) as a releasing agent when a polyester resin (A) for high polymerization, a low-molecular polyester resin (B), and a polyvalent isocyante compound are mixed and subjected to reaction. COPYRIGHT: (C)2004,JPO |
