Polyester resin for electrophotography toner, process for preparing the same, and an electrophotographic toner comprising the same

摘要

A polyester resin for a toner wherein a ratio of insoluble material in THF is comprised at 5 weight % or less, a ratio of soluble polymer having a molecular weight of 1x106 or greater in THF is comprised at a range of 1 weight % to 10 weight %, a soluble polymer having a molecular weight greater than 1x105 in THF is comprised in a range of 10 weight % to 20 weight %, and the following relationship is satisfied W1>W2 wherein a ratio of a soluble polymer having a molecular weight less than 1x104 in THF is shown by W1, a ratio of a soluble polymer having a molecular weight greater than 1x104 and less than 1x105 in THF is shown by W2.