Patent ID: 10591836

Abstract:
A toner includes toner particles. The toner particles each include a toner core containing a binder resin and a shell layer covering a surface of the toner core. The shell layers contain a branched macromolecule. The branched macromolecule includes a repeating unit having an oxazoline group. The branched macromolecule satisfies a relationship represented by rB/rL≤0.80, where rB represents a radius of gyration of the branched macromolecule when an absolute molecular weight of the branched macromolecule is 40,000, and rL represents a radius of gyration of a linear macromolecule including a main chain having the same structure as a main chain of the branched macromolecule when an absolute molecular weight of the linear macromolecule is 40,000. rB and rL are each a radius of gyration measured by gel permeation chromatography using a multi-angle laser light scattering detector.