申请人:CANON KABUSHIKI KAISHA
公开号:US20150099227A1
公开(公告)日:2015-04-09
The present invention provides a crystalline polyester resin for toner that has, when used as a resin for toner, a sharp melt property, excellent fixing performance and blocking property and a preferable charging performance. Provided is a crystalline polyester resin for toner, which is obtained by condensation polymerization of a dicarboxylic acid component containing at least one compound selected from the group consisting of terephthalic acid, 2,6-naphthalenedicarboxylic acid and derivatives thereof, and a diol component containing at least one compound selected from the group consisting of 2-methyl-1,3-propanediol, 2,2-dimethyl-1,3-propanediol and derivatives thereof, the crystalline polyester resin having a weight-average molecular weight of not less than 5000 and not more than 50000.
本发明提供了一种用于制作墨粉的结晶聚酯树脂,当用作墨粉的树脂时,具有锐利的熔融特性,优异的固定性能和阻塞性能以及优选的充电性能。所提供的结晶聚酯树脂是通过含有苯二甲酸、2,6-萘二甲酸及其衍生物中至少一种化合物的二羧酸组分和含有2-甲基-1,3-丙二醇、2,2-二甲基-1,3-丙二醇及其衍生物中至少一种化合物的二元醇组分的缩聚聚合而得到的,该结晶聚酯树脂具有重均分子量不小于5000且不大于50000。