申请人:Canon Kabushiki Kaisha
公开号:EP2985303A1
公开(公告)日:2016-02-17
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.
本发明提供了一种墨粉用结晶聚酯树脂,当用作墨粉用树脂时,该树脂具有敏锐的熔融特性、优异的固定性能和阻塞性能,以及优越的充电性能。本发明提供了一种墨粉用结晶聚酯树脂,它是由含有至少一种从对苯二甲酸、2,6-萘二甲酸及其衍生物组成的组中选出的化合物的二羧酸组分和至少含有一种从对苯二甲酸、2,6-萘二甲酸及其衍生物组成的组中选出的化合物的二元醇组分缩合聚合而得、和二元醇组分,二元醇组分含有至少一种选自由 2-甲基-1,3-丙二醇、2,2-二甲基-1,3-丙二醇及其衍生物组成的组中的化合物,结晶聚酯树脂的重量平均分子量不小于 5000,不大于 50000。