Xerox Corporation

University of Montreal

Danielle C Boils-Boissier

Marcel Philippe Breton

Jeffrey H Banning

Donald R Titterington

Jule W Thomas, Jr

James D Wuest

H Bruce Goodbrand

Marie-Eve Perron

Hugues Duval

Dominic Laliberte

Christine E Bedford

Francis Monchamp

Barkev Keoshkerian

Raj D Patel

Stephan V Drappel

Daryl Walter Vanbesien

James Daniel Mayo

Sandra J Gardner

Paul Farrell Smith

Kimberly D Nosella

Raymond W Wong

Paul Joseph Gerroir

Enno Eric Agur

Allan K Chen

Tie Hwee Ng

Patricia Ann Burns

Joseph August Bartel

Sheau V Kao

Rosa M Duque

Arthur Helbrecht

Allison Rutland

A wax emulsion comprised of polyethylene wax and one or more surfactants in an aqueous medium, wherein the polyethylene wax has a degree of crystallinity of from about 50% to about 80% by weight of the polyethylene wax, is provided. The wax emulsion is made by emulsifying the polyethylene wax, one or more surfactants and an aqueous medium in a vessel at a temperature at or above the melting point of the polyethylene wax to form an emulsified product, and subsequently cooling the emulsified product to ambient temperature at a cooling rate of at least 10&#xb0; C. per minute. The wax emulsion is preferably incorporated into toner particles prepared by emulsion/aggregation/coalescing.

Wax emulsion for emulsion aggregation toner

Compounds of the formula wherein, provided that at least one of R, R, and Ris not hydrogen, R, R, and Reach, independently of the other, is hydrogen, alkyl, aryl, arylalkyl, or alkylaryl, and wherein Rand Rcan also be alkoxy, aryloxy, arylalkyloxy, alkylaryloxy, polyalkyleneoxy, polyaryleneoxy, polyarylalkyleneoxy, polyalkylaryleneoxy, silyl, siloxane, polysilylene, polysiloxane, or wherein X is a direct bond, oxygen, sulfur, &#x2014;NR&#x2014; wherein Ris hydrogen, alkyl, aryl, arylalkyl, or alkylaryl, or &#x2014;CRR&#x2014; wherein Rand Reach, independently of the other, is hydrogen, alkyl, aryl, arylalkyl, or alkylaryl.

Guanidinopyrimidinone compounds and phase change inks containing same

Compounds of the formulae wherein, provided that at least one of R, R, and Ris not a hydrogen atom, R, R, and Reach, independently of the other, is hydrogen, alkyl, aryl, arylalkyl, or alkylaryl, and wherein Rand Rcan also be alkoxy aryloxy, arylalkyloxy, alkylaryloxy, polyalkyleneoxy, polyaryleneoxy, polyarylalkyleneoxy, polyalkylaryleneoxy, silyl, siloxane, polysilylene, polysiloxane, or a group of the formula wherein r and s are integers representing a number of repeat &#x2014;CH&#x2014; groups, and wherein X is a direct bond, oxygen, sulfur, &#x2014;NR&#x2014; wherein Ris hydrogen, alkyl, aryl, arylalkyl, or alkylaryl, or &#x2014;CRR&#x2014; wherein Rand Reach, independently of the other, is hydrogen, alkyl, aryl, arylalkyl, or alkylaryl, and Rand Reach, independently of the other, is alkylene, arylene, arylalkylene, or alkylarylene, and wherein Rcan also be polyalkyleneoxy, polyaryleneoxy, polyarylalkyleneoxy, polyalkylaryleneoxy, silylene, siloxane, polysilylene, or polysiloxane.

Compounds of the formulae wherein Z is &#x2014;OR, &#x2014;SR, &#x2014;NRR, Y is &#x2014;OR, &#x2014;SR, or &#x2014;NRR, at least one of R, R, R, R, R, and Ris hydrogen, at least one of R, R, R, R, R, and Ris other than hydrogen, at least one Z or Y within the compound is &#x2014;NRRor &#x2014;NRR, R, R, R, R, R, R, and Reach, independently of the others, is hydrogen, alkyl, aryl, arylalkyl, or alkylaryl, and wherein Rcan also be alkoxy, aryloxy, arylalkyloxy, alkylaryloxy, polyalkyleneoxy, polyaryleneoxy, polyarylalkyleneoxy, polyalkylaryleneoxy, silyl, siloxane, polysilylene, polysiloxane, or wherein X is a direct bond, oxygen, sulfur, &#x2014;NR&#x2014; wherein Ris hydrogen, alkyl, aryl, arylalkyl, alkylaryl, or &#x2014;CRR&#x2014; wherein Rand Reach, independently of the other, is hydrogen, alkyl, aryl, arylalkyl, or alkylaryl.

Alkylated urea and triaminotriazine compounds and phase change inks containing same

Compounds of the formulae wherein Z is OR, SR, or NRR, Y is OR, SR, or NRR, at least one of R, R, R, R, R, and Ris hydrogen, at least one of R, R, R, R, R, and Ris other than hydrogen, at least one Z or Y within the compound is NRRor &#x2014;NRR, R, R, R, R, R, R, and Reach, independently of the others, is hydrogen, alkyl, aryl, arylalkyl, or alkylaryl, and wherein Rcan also be (vi) an alkoxy, aryloxy, arylalkyloxy, alkylaryloxy, polyalkyleneoxy, polyaryleneoxy, polyarylalkyleneoxy, polyalkylaryleneoxy, silyl, siloxane, polysilylene, polysiloxane, or wherein X is a direct bond, oxygen, sulfur, NR&#x2014; wherein Ris hydrogen, alkyl, aryl, arylalkyl, or alkylaryl, or CRR&#x2014; wherein Rand Reach, independently of the other, is hydrogen, alkyl, aryl, arylalkyl, or alkylaryl, and wherein Rcan also be 

A chemical toner and an emulsion aggregation process for preparing the chemical toner, wherein the chemical toner is composed of: (a) a resin including a compound which exhibits a molecular weight polydispersity of from about 1.1 to about 3.0 (where the resin is produced by a stable free radical polymerization process); (b) an optional wax; and (c) a colorant, wherein the particle size of the chemical toner exhibits a geometric standard deviation of about 1.25 or less.

Toner fabrication process

Phase change ink compositions comprising (a) an ink carrier comprising a monoamide and a tetra-amide, and (b) pigment particles having oxygen-containing functional groups on the surfaces thereof. Also, processes for preparing a phase change ink which comprise (a) melting a tetra-amide which is solid at about 25&#xb0; C.; (b) admixing with the molten tetra-amide pigment particles having oxygen-containing functional groups on the surfaces thereof; (c) maintaining the mixture of pigment and tetra-amide at a temperature of at least about 100&#xb0; C. and at a temperature of no more than about 200&#xb0; C. for a period sufficient to enable the molten tetra-amide to wet the pigment particle surfaces; (d) subsequent to wetting of the pigment particle surfaces with the molten tetra-amide, adding to the mixture a monoamide; (e) subsequent to addition of the monoamide, subjecting the resulting mixture to high shear mixing; and (f) subsequent to subjecting the mixture to high shear mixing, optionally adding to the mixture additional ink ingredients.

Phase change inks and process for the preparation thereof

Disclosed is a phase change ink composition comprising an ink vehicle, a colorant, and a nonpolymeric organic gelator selected from the group consisting of anthracene-based compounds, steroid compounds, partially fluorinated high molecular weight alkanes, high molecular weight alkanes with exactly one hetero atom, chiral tartrate compounds, chiral butenolide-based compounds, bis-urea compounds, guanines, barbiturates, oxamide compounds, ureidopyrimidone compounds, and mixtures thereof, said organic gelator being present in the ink in an amount of no more than about 20 percent by weight of the ink, said ink having a melting point at or below which the ink is a solid, said ink having a gel point at or above which the ink is a liquid, and said ink exhibiting a gel state between the melting point and the gel point, said ink exhibiting reversible transitions between the solid state and the gel state upon heating and cooling, said ink exhibiting reversible transitions between the gel state and the liquid state upon heating and cooling, said melting point being greater than about 35&#xb0; C., said gel point being greater than said melting point. Also disclosed are imaging processes employing phase change inks containing gelator additives.

Phase change inks containing gelator additives

Disclosed are compounds of the formulaewherein Z is a group of the formula &#x2014;OR, a group of the formula &#x2014;SR, or a group of the formula &#x2014;NRR, Y is a group of the formula &#x2014;OR, a group of the formula &#x2014;SR, or a group of the formula &#x2014;NRR, n is an integer representing the number of repeat &#x2014;(CH)&#x2014; or &#x2014;(CHCHO)&#x2014; units, wherein, provided that at least one of R, R, R, R, R, and Ris a hydrogen atom, provided that at least one of R, R, R, R, R, and Ris other than a hydrogen atom, and provided that at least one Z or Y within the compound is a group of the formula &#x2014;NRRor a group of the formula &#x2014;NRR, R, R, R, R, R, R, and Reach, independently of the others, is (i) a hydrogen atom, (ii) an alkyl group, (iii) an aryl group, (iv) an arylalkyl group, or (v) an alkylaryl group, and wherein Rcan also be (vi) an alkoxy group, (vii) an aryloxy group, (Viii) an arylalkyloxy group, (ix) an alkylaryloxy group, (x) a polyalkyleneoxy group, (xi) a polyaryleneoxy group, (xii) a polyarylalkyleneoxy group, (xiii) a polyalkylaryleneoxy group, (xiv) a silyl group, (xv) a siloxane group, (xvi) a polysilylene group, (xvii) a polysiloxane group, or (xviii) a group of the formulawherein r is an integer representing a number of repeat &#x2014;CH&#x2014; groups, wherein s is an integer representing a number of repeating &#x2014;CH&#x2014; groups, and wherein X is (a) a direct bond, (b) an oxygen atom, (c) a sulfur atom, (d) a group of the formula &#x2014;NR&#x2014; wherein Ris a hydrogen atom, an alkyl group, an aryl group, an arylalkyl group, or an alkylaryl group, or (e) a group of the formula &#x2014;CRR&#x2014; wherein Rand Reach, independently of the other, is a hydrogen atom, an alkyl group, an aryl group, an arylalkyl group, or on alkylaryl group, and wherein Rcan also beAlso disclosed are phase change ink compositions comprising a colorant and a phase change ink carrier comprising a material of this formula.

Alkylated tetrakis(triaminotriazine) compounds and phase change inks containing same

A process for making silica-containing latex particles involves polymerizing monomer in an emulsion comprising the monomer, water, silica particles, and optionally at least one surfactant, by adding at least one free radical initiator to the emulsion to form the silica-containing latex particles. In a preferred method, semicontinuous polymerization employing a seed latex is used to form the latex resin. The process achieves a silica-containing latex in which the silica is chemically incorporated therein that is ideally suited for use in the manufacture of toner and developer for xerographic use.

Semicontinuous emulsion polymerization process for making silica-containing latex for toners

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Mississauga, Canada

Danielle C Boils-Boissier