Xerox Corporation

Amy Avolia Grillo

Chieh-Min Cheng

Shigang S Qiu

Peter Van Nguyen

Shigeng Li

Steven M Malachowski

Tie Hwee Ng

Beng S Ong

Yuhua Tong

Paul Farrell Smith

Paul Joseph Gerroir

Yulin Wang

Allan K Chen

Zhen Lai

Eugene Frederick Young

Yanjia Zuo

Emily Louise Moore

David R Kurceba

Christopher M Wolfe

Judith M Vandewinckel

Jay Lee Schneider

Rashid Mahmood

Eric David Godshall

Linda S Schriever

Randy Pheav Tin

Donald Riley

Richard Fong

Shigang Steven Qiu

A process for making colored polyester latex by phase inversion emulsification is described.

Method for making color toner

The disclosure provides robust phase inversion emulsification (PIE) processes, which produces polyester latex particles having particle size distributions with high centering capability indexes (Cpk), for the preparation of toners of good quality.

Robust phase inversion emulsification process for polyester latex production

A process for making a latex emulsion where distillation occurs at an elevated temperature is used to make resin particles with a conditioned surface which can be used to make magenta toner with increased efficiency.

Magenta toner

A process for making a crystalline latex emulsion suitable for use in toner using phase invention emulsification (PIE) where solvent is reused is presented.

Crystalline polyester latex production by solvent reuse phase inversion emulsification

A process is disclosed for making a resin emulsion suitable for use in forming toner particles including using a wiped film evaporator for removing residual solvents.

Production of latex using a wipe film evaporator

A phase inversion emulsification process includes dissolving a polyester resin in a mixture comprising (1) an organic solvent, (2) a first portion of a total amount of neutralizing agent, and (3) a first portion of water, neutralizing the dissolved polyester resin with a second portion of neutralizing agent, the second portion of neutralizing agent including the remaining amount of the total amount neutralizing agent, forming an emulsion by adding a second portion of water after the neutralizing step, and removing a portion of the organic solvent from the emulsion to provide a latex.

Process for preparing polyester emulsions

A method for reclaiming an out-of-spec emulsion material includes recovering the out-of-spec emulsion material from a scrap manufacturing batch; distilling the out-of-spec emulsion material to raise a solids content of the out-of-spec emulsion material to about 45 wt % or more based on a total weight of the emulsion material; dissolving the distilled emulsion material in a solvent to form a first mixture; adding a base to the first mixture to neutralize acid groups present in the distilled emulsion material, forming a second mixture; emulsifying the second mixture by adding water to the second mixture; and forming particles having an average particle diameter (D50v) within a target range, wherein the out-of-spec emulsion material has an average particle diameter falling outside of the target range.

Phase inversion emulsification reclamation process

A process for preparing a toner includes mixing a polymeric resin emulsion, a colorant dispersion, and a wax to form a mixture; optionally adding a coagulant to the mixture; heating the mixture at a temperature below a glass transition temperature of the polymeric resin to aggregate the polymeric resin, colorant, and wax, to form aggregated particles; adding a coalescent agent to the aggregated particles; heating the aggregated particles and coalescent agent at a temperature above the glass transition temperature of the polymeric resin, to coalesce the aggregated particles to form toner particles, optionally cooling the mixture, and isolating the tone particles.

Emulsion/aggregation process using coalescent aid agents

Herein is disclosed a process for producing emulsion aggregation toner including (i) adding a base to an emulsion aggregation toner to increase the pH of the toner to from about 7 to about 12; (ii) sieving and filtering the toner; (iii) washing the toner with an enzyme selected from the group consisting of carboxylic ester hydrolase and sulfuric ester hydrolase; (iv) filtering the toner; (v) washing the toner with reverse osmosis or deionized water; and (vi) adding an acid to reduce the pH of the toner to from about 3 to about 8.

Processes for producing toner by treatment with enzyme

A toner process comprising mixing a colorant dispersion with a latex, a wax dispersion, and a coagulant, and wherein the polymer latex selected possesses a weight average molecular weight of from about 20,000 to about 55,000, a number average molecular weight of from about 5,000 to about 18,000, an onset glass transition temperature Tg of from about 40&#xb0; C. to about 80&#xb0; C., and a particle size distribution PSD of from about 50 to about 500 nanometers.

Growing community of inventors

Rochester, NY, United States of America

Amy Avolia Grillo