Ultra low melt toners comprised of crystalline resins
AssigneeXerox Corporation
InventorsGuerino Sacripante, Ke Zhou, Michael Hawkins, Kimberly Nosella, Edward Zwartz, Nicoleta Mihai, Valerie Farrugia, Stephan Drappel, Paul Gerroir
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Abstract
A toner having an amorphous resin, a crystalline resin, and a colorant, wherein the crystalline resin has a melting temperature of at least 70° C. and a recrystallization point of at least 47° C. exhibits improved document offset properties and improved heat cohesion. Annealing the toner further improves the heat cohesion and morphology of the toner.
Claims23
A toner particle comprising a binder, wherein the binder comprises an amorphous resin and a crystalline resin, and wherein the crystalline resin has a melting point of at least about 70° C. and a recrystallization point of at least about 47° C.
A method of forming a toner particle comprising a binder, comprising:
- forming the binder of an amorphous resin and a crystalline resin, wherein the crystalline resin has a melting point of at least about 70° C. and a recrystallization point of at least about 47° C., and
- forming the toner particle from the binder.
The method according to claim 17, wherein the crystalline resin is a sulfonated polyester resin or a sulfonated copolyester resin.
A process comprising:
- forming toner particles comprising a binder, wherein the binder comprises an amorphous polyester resin and a crystalline resin;
- and
- annealing the toner particles at a temperature within 10° C. of a recrystallization temperature and at or above a glass transition temperature of the crystalline resin.
Dependencies are inferred from the claim text.