Electrostatic charge image developing toner, electrostatic charge image developer, toner cartridge, process cartridge, image forming apparatus, and image forming method

1. An electrostatic charge image developing toner comprising:

toner particles comprising a polyester resin having an ethylenic unsaturated bond, and a reaction product of the polyester resin and a compound having an imidazoline structure,

wherein the polyester resin has repeat units derived from a polyol and a polycarboxylic acid including a trimellitic acid, and a molar ratio of the repeat units derived from the trimellitic acid is from 0.1 mol% to 10 mol% with respect to the entire polymerization components of the polyester resin, and

the reaction product exists in a surface part of the toner particles, and a weight ratio of the compound having an imidazoline structure is from 0.1% by weight to 10% by weight with respect to the total weight of the toner particles excluding the compound having an imidazoline structure.

2. The electrostatic charge image developing toner according to claim 1 ,

wherein the molar ratio of the trimellitic acid is from 0.5 mol % to 5.0 mol % with respect to the entire polymerization components of the polyester resin.

3. The electrostatic charge image developing toner according to claim 1 ,

wherein the molar ratio of the trimellitic acid is from 0.8 mol % to 3.0 mol % with respect to the entire polymerization components of the polyester resin.

4. The electrostatic charge image developing toner according to claim 1 ,

wherein the weight ratio of the compound having an imidazoline structure is from 0.5% by weight to 5.0% by weight with respect to the total weight of the toner particles excluding the compound having an imidazoline structure.

5. The electrostatic charge image developing toner according to claim 1 ,

wherein the weight ratio of the compound having an imidazoline structure is from 0.8% by weight to 3.0% by weight with respect to the total weight of the toner particles excluding the compound having an imidazoline structure.

6. The electrostatic charge image developing toner according to claim 1 ,

wherein the compound having an imidazoline structure is a compound including the imidazoline structure and an azo group in the same molecule.

7. An electrostatic charge image developer comprising:

the electrostatic charge image developing toner according to claim 1 .

8. A process cartridge that is detachable from 10° C. an image forming apparatus, comprising:

a developing unit that accommodates the electrostatic charge image developer according to claim 7 and develops an electrostatic charge image formed on an image holding member with the electrostatic charge image developer to form a toner image.

9. An image forming apparatus comprising:

an image holding member;

a charging unit that charges the image holding member;

an electrostatic charge image forming unit that forms an electrostatic charge image on a surface of a charged image holding member;

a developing unit that accommodates the electrostatic charge image developer according to claim 7 and develops the electrostatic charge image formed on the image holding member with the electrostatic charge image developer to form a toner image;

a transfer unit that transfers the toner image formed on the image holding member onto a recording medium; and

a fixing unit that fixes the toner image transferred onto the recording medium.

10. An image forming method comprising:

charging an image holding member;

forming an electrostatic charge image on a surface of a charged image holding member;

developing the electrostatic charge image formed on the image holding member with the electrostatic charge image developer according to claim 7 to form a toner image;

transferring the toner image formed on the image holding member onto a recording medium; and

fixing the toner image transferred onto the recording medium.

11. A toner cartridge that accommodates the electrostatic charge image developing toner according to claim 1 and is detachable from an image forming apparatus.