Abstract: A chemically prepared core shell toner formulation for use in electrophotography having an inventive softening agent consisting of a core shell latex having an encapsulated interpenetrating polymer network microgel in the core of the toner is disclosed. Having this core shell latex with an encapsulated IPN microgel in the core of the toner results in a toner that can simultaneously fuse at a desirable low temperature and survive the temperature extremes associated with shipping and storage.

Abstract: A method for producing core shell toner particles wherein the toner core includes a unique softening agent consisting of a core shell styrene acrylic latex having an encapsulated IPN microgel. A first polymer emulsion is combined and agglomerated with a pigment dispersion and a wax emulsion and the above described styrene acrylic latex having an encapsulated IPN microgel to form toner cores. A second polymer emulsion is combined and agglomerated with the toner cores to form toner shells around the toner cores. The toner cores and toner shells are then fused to form toner particles.

Abstract: A chemically prepared core shell toner formulation for use in electrophotography having an inventive softening agent consisting of a core shell latex having an encapsulated interpenetrating polymer network microgel in the core of the toner is disclosed. Having this core shell latex with an encapsulated IPN microgel in the core of the toner results in a toner that can simultaneously fuse at a desirable low temperature and survive the temperature extremes associated with shipping and storage.