Toner compositions and processes thereof
First Claim
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1. A process for the preparation of toner comprising(i) blending an aqueous colorant dispersion with a latex blend comprised of a linear polymer and a soft crosslinked polymer;
- (ii) heating the resulting mixture at about below, or about equal to the glass transition temperature (Tg) of the linear latex polymer to form aggregates; and
(iii) subsequently heating said aggregate suspension about above, or about equal to the Tg of the linear latex polymer to effect fusion or coalescence of said aggregates, and wherein said soft crosslinked polymer is flexible and contains an acrylate in an amount of from about 25 to about 70 weight percent.
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Abstract
A process for the preparation of toner including
(i) blending an aqueous colorant dispersion with a latex blend comprised of a linear polymer and a soft crosslinked polymer;
(ii) heating the resulting mixture at about below, or about equal to the glass transition temperature (Tg) of the linear latex polymer to form aggregates; and
(iii) subsequently heating said aggregate suspension about above, or about equal to the Tg of the linear latex polymer to effect fusion or coalescence of said aggregates.
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Citations
27 Claims
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1. A process for the preparation of toner comprising
(i) blending an aqueous colorant dispersion with a latex blend comprised of a linear polymer and a soft crosslinked polymer; -
(ii) heating the resulting mixture at about below, or about equal to the glass transition temperature (Tg) of the linear latex polymer to form aggregates; and (iii) subsequently heating said aggregate suspension about above, or about equal to the Tg of the linear latex polymer to effect fusion or coalescence of said aggregates, and wherein said soft crosslinked polymer is flexible and contains an acrylate in an amount of from about 25 to about 70 weight percent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 24, 25, 26, 27)
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22. A process for the preparation of toner comprising heating a mixture of an aqueous colorant dispersion containing a first ionic surfactant, and a latex blend comprised of linear polymer and soft crosslinked polymer particles, a nonionic surfactant and a second ionic surfactant with a charge polarity opposite to that of said ionic surfactant in said colorant dispersion;
- heating the resulting mixture at about below the glass transition temperature (Tg) of the linear latex polymer to form toner sized aggregates; and
subsequently heating said aggregates about above the Tg of the linear latex polymer to effect coalescence of said aggregates, followed by optionally isolating said toner, and optionally washing said toner, and wherein said soft crosslinked polymer particles contain from about 25 to about 70 weight percent of an acrylate. - View Dependent Claims (23)
- heating the resulting mixture at about below the glass transition temperature (Tg) of the linear latex polymer to form toner sized aggregates; and
Specification