Ink toner particles with controlled surface morphology
First Claim
1. A process for producing a colored toner comprising:
- forming a polymer composition comprising at least one polymer and a colorant, wherein the at least one polymer has a softening temperature from about 60°
C. to about 160°
C.;
forming an aqueous mineral suspension of at least one multivalent metal phosphate;
forming a dispersion by combining the polymer composition and the aqueous mineral suspension under agitation to form a solid portion comprising dispersed particles of the polymer composition, wherein the temperature of the aqueous mineral suspension during the dispersion is at least about 70°
C.;
heating the dispersion to a temperature above a glass transition temperature (Tg) of the polymer composition and increasing the pH to above 7.0;
cooling the dispersion comprising the dispersed particles of the polymer composition; and
recovering the particles.
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Accused Products
Abstract
The present invention provides a process for producing a colored toner having a textured surface, the process includes forming a polymer composition of at least one polymer and a colorant, where the at least one polymer has a softening temperature from about 60° C. to about 160° C.; forming an aqueous mineral suspension of at least one multivalent metal phosphate; forming a dispersion by combining the polymer composition and the aqueous mineral suspension under agitation to form a solid portion comprising dispersed particles of the polymer composition; heating the dispersion to a temperature above a glass transition temperature (Tg) of the polymer composition and increasing the pH to above 7.0; cooling the dispersion including the dispersed particles of the polymer composition to a temperature of from about 1° C. to about 89° C.; and recovering the particles.
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Citations
19 Claims
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1. A process for producing a colored toner comprising:
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forming a polymer composition comprising at least one polymer and a colorant, wherein the at least one polymer has a softening temperature from about 60°
C. to about 160°
C.;forming an aqueous mineral suspension of at least one multivalent metal phosphate; forming a dispersion by combining the polymer composition and the aqueous mineral suspension under agitation to form a solid portion comprising dispersed particles of the polymer composition, wherein the temperature of the aqueous mineral suspension during the dispersion is at least about 70°
C.;heating the dispersion to a temperature above a glass transition temperature (Tg) of the polymer composition and increasing the pH to above 7.0; cooling the dispersion comprising the dispersed particles of the polymer composition; and recovering the particles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of producing a colored toner with a given surface morphology comprising:
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forming a polymer composition comprising at least one polymer and a colorant, wherein the at least one polymer has a softening temperature from about 60°
C. to about 160°
C.;forming an aqueous mineral suspension of at least one multivalent metal phosphate; forming a dispersion by combining the polymer composition and the aqueous mineral suspension under agitation to form a solid portion comprising dispersed particles of the polymer composition, wherein the temperature of the aqueous mineral suspension during the dispersion is at least about 70°
C.; andeither (i) heating the dispersion to a temperature above a glass transition temperature (Tg) of the polymer composition and adjusting the pH of the dispersion to be basic;
cooling the dispersion comprising the dispersed particles of the polymer composition; and
recovering particles comprising a textured surface;
or(ii) heating the dispersion to a temperature above a glass transition temperature (Tg) of the polymer composition and adjusting the pH of the dispersion to be acidic;
cooling the dispersion comprising the dispersed particles of the polymer composition; and
recovering particles comprising a smooth surface. - View Dependent Claims (18, 19)
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Specification