Toner for electrophotography and process for producing the same

A process for producing a toner for electrophotography which comprises:

• melt-kneading a mixture comprising a saturated polyester resin having a melting initiation temperature of from 50.degree. C. to less than 100.degree. C., an unsaturated polyester resin formulated from an unsaturated polyester crosslinked at the ethylenic unsaturation of the unsaturated polyester, a colorant, and a radical-polymerization catalyst to crosslink the unsaturated polyester with the aid of the radical polymerization catalyst during the melt kneading,
• subsequently pulverizing the kneaded mixture, and then classifying the resulting particles.

A toner for electrophotography which comprises a polyester resin and a colorant, the polyester resin comprising a saturated polyester resin having a melting initiation temperature of from 50.degree. C. to less than 100.degree. C., and a crosslinked polyester resin formulated from an unsaturated polyester and a reactive monomer radically polymerized with an ethylenic unsaturation of the unsaturated polyester.

A toner for electrophotography which comprises a polyester resin and a colorant, the polyester resin consisting essentially of a saturated polyester resin having a melting initiation temperature of from 50.degree. C. to less than 100.degree. C., and a crosslinked polyester resin formulated from an unsaturated polyester crosslinked at the ethylenic unsaturation of the unsaturated polyester.

A toner for electrophotography which comprises a polyester resin and a colorant, the polyester resin consisting essentially of a saturated polyester resin having a melting initiation temperature of from 50.degree. C. to less than 100.degree. C., and a crosslinked polyester resin formulated from an unsaturated polyester and a reactive monomer radically polymerized with an ethylenic unsaturation of the unsaturated polyester.