| abstract |
PROBLEM TO BE SOLVED: To provide a polyester resin for toner having excellent pulverization property and wide fixing temperature range. A polyester resin having a structural unit represented by formula (1), a polyester resin having an unsaturated double bond, and a polyester resin in which a monomer mixture containing a polyvalent carboxylic acid and a polyhydric alcohol is polycondensed is produced. A method for producing a polyester resin, wherein the monomer mixture contains at least one of a polyvalent carboxylic acid having an unsaturated double bond and a polyhydric alcohol having an unsaturated double bond, and erythritan. [Chemical 1] [Selection figure] None |