| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin for toner which has balanced hot offset proof-property and low temperature fixing property, even when used in a high-speed and energy-saving process. SOLUTION: The resin for toner includes a polyester resin (A) having a THF insoluble fraction content of 1 to 36 wt.%, a peak top molecular weight of 4,500 to 20,000 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). The formula (1) is (acid value)/(hydroxyl value)≥1 (where the acid value ranging from 15 to 80 mgKOH/g and the hydroxyl value is more than 3.0 mgKOH/g) and the formula (2) is (a numeric value of the THF-insoluble fraction content expressed by wt.%)/(a numeric value of the softening point expressed°C unit)≤0.2. COPYRIGHT: (C)2011,JPO&INPIT
|
