| 摘要 |
The object is to develop a resin for a toner, which has both of hot offset resistance and a low-temperature fixing property even when used in a high-speed and energy-saving toner. Thus, disclosed is a resin for a toner, which comprises a polyester resin (A) having a THF insoluble fraction content of 1 to 36 wt%, a peak top molecular weight of 4500 to 20000 as measured by gel permeation chromatography on a THF soluble fraction, and a softening point of 120 to 180°C, and meeting the requirements represented by the following formulae (1) and (2). (Acid value)/(hydroxy value) <= 1 Formula (1)[wherein the acid value is 15 to 80 mgKOH/g, and the hydroxy value is greater than 3.0 mgKOH/g.](A numeric value of the THF insoluble fraction content expressed as a percent by weight (wt%))/(a numeric value of the softening point expressed as a degree°C) <= 0.2 Formula (2). |
