RESIN FOR TONER AND TONER
First Claim
1. 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, anda diol component containing at least one compound selected from the group consisting of 2-methyl-1,3-propanediol and derivatives thereof, whereinthe dicarboxylic acid component contains terephthalic acid, 2,6-naphthalenedicarboxylic acid and derivatives thereof in total at not less than 50% by mole based on a sum of the dicarboxylic acid component,the diol component contains 2-methyl-1,3-propanediol and derivatives thereof in total at not less than 50% by mole based on a sum of the diol component, andthe crystalline polyester resin has a weight-average molecular weight as measured by gel permeation chromatography of not less than 5000 and not more than 50000.
1 Assignment
0 Petitions
Accused Products
Abstract
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.
-
Citations
12 Claims
-
1. 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 and derivatives thereof, wherein the dicarboxylic acid component contains terephthalic acid, 2,6-naphthalenedicarboxylic acid and derivatives thereof in total at not less than 50% by mole based on a sum of the dicarboxylic acid component, the diol component contains 2-methyl-1,3-propanediol and derivatives thereof in total at not less than 50% by mole based on a sum of the diol component, and the crystalline polyester resin has a weight-average molecular weight as measured by gel permeation chromatography of not less than 5000 and not more than 50000. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
2-3. -3. (canceled)
Specification