Abstract: A process for the preparation of polymers which comprises generating a solution of water and polyvinyl alcohol with acetate groups; adding thereto a mixture of an alkali metal iodide and iodine; adding thereto initiator, and optional crosslinking agent; adding monomer, a mixture of monomers, or a monomer/polymer mixture; homogenizing, and polymerizing; and wherein there is formed an iodide/iodine/acetate complex prior to said polymerizing.
Type:
Grant
Filed:
March 29, 2000
Date of Patent:
October 17, 2000
Assignee:
Xerox Corporation
Inventors:
Thomas E. Enright, George Liebermann, Scott M. Silence, K. Derek Henderson, Hadi K. Mahabadi, Bernard A. Kelly
Abstract: A photoconductive imaging member comprised of a supporting substrate, a layer (1) thereover, a photogenerating layer and a charge transport layer, and wherein said layer (1) is generated from a mixture of a polyhydroxyalkylacrylate, and an amino alkyltrialkoxysilane.
Type:
Grant
Filed:
May 27, 1999
Date of Patent:
October 17, 2000
Assignee:
Xerox Corporation
Inventors:
Timothy J. Fuller, Damodar M. Pai, John F. Yanus, Markus R. Silvestri, Huoy-Jen Yuh, John S. Chambers, Harold F. Hammond, Susan M. Vandusen, Dennis J. Prosser, Kathleen M. Carmichael, Robert C. U. Yu, Neil S. Patterson
Abstract: A process involving the mixing of a latex emulsion containing resin and a surfactant with a colorant dispersion containing a nonionic surfactant, and a polymeric additive and adjusting the resulting mixture pH to less than about 4 by the addition of an acid and thereafter heating at a temperature below about, or equal to about the glass transition temperature (Tg) of the latex resin, subsequently heating at a temperature above about, or about equal to the Tg of the latex resin, cooling to about room temperature, and isolating the toner product.
Abstract: A reactive melt mixing process for the preparation of a low fix temperature toner resin, comprising:(a) mixing a reactive base resin, an initiator, and a polyester with amine functionality, and(b) crosslinking the resulting polymer melt under high shear to form a crosslinked toner resin.
Type:
Grant
Filed:
November 29, 1993
Date of Patent:
September 5, 2000
Assignee:
Xerox Corporation
Inventors:
Peter G. Odell, Stephan V. Drappel, Michael S. Hawkins
Abstract: An ink composition comprised of (1) a solid oxazoline compound with a melting point of from about 60.degree. C. to about 120.degree. C. and an acoustic-loss value of from about 25 to about 80 dB/mm; (2) a carbamate compound with a melting point of from about 25.degree. C. to about 100.degree. C.; (3) an alcohol compound; (4) a lightfastness component; (5) a lightfastness antioxidant; and (6) a colorant.
Type:
Grant
Filed:
April 27, 1999
Date of Patent:
August 29, 2000
Assignee:
Xerox Corporation
Inventors:
Marcel P. Breton, Shadi L. Malhotra, Raymond W. Wong, Danielle C. Boils, Carl P. Tripp, Pudupadi R. Sundararajan
Abstract: An ink composition comprised of (1) an oxazoline compound; (2) a thiourea compound with an optional melting point of from about 25 to about 100.degree. C., and with an optional acoustic-loss value of from about 5 to about 40 dB/mm; (3) an alcohol; (4) a lightfastness compound; (5) an antioxidant; and (6) a colorant.
Type:
Grant
Filed:
April 27, 1999
Date of Patent:
August 22, 2000
Assignee:
Xerox Corporation
Inventors:
Shadi L. Malhotra, Raymond W. Wong, Marcel P. Breton
Abstract: An ink composition comprised of (1) an azole compound, (2) a viscosity compound, (3) a lightfastness component, (4) an antioxidant, and (5) a colorant.
Type:
Grant
Filed:
June 29, 1999
Date of Patent:
August 22, 2000
Assignee:
Xerox Corporation
Inventors:
Marcel P. Breton, Shadi L. Malhotra, Raymond W. Wong
Abstract: A coated transparency comprised of a substrate with four hydrophilic coating layers, two coating layers on the front side of the substrate and two coating layers on the reverse side of the substrate, wherein said front side coatings are comprised of an antistatic hydrophilic layer in contact with the substrate comprised of a blend of (1) a hydrophilic binder, (2) a water soluble acid salt, (3) a cationic component, and (4) a biocide, and the second coating situated on top of the first coating is comprised of (1) a binder formed from a latex, (2) a toner wetting agent, (3) a lightfast UV absorber, (4) a lightfast antioxidant, and (5) a lightfast antiozonant compound; and wherein said two coatings in contact with the reverse side of the substrate are comprised of a third hydrophilic antistatic luminescent coating comprised of a blend of (1) a hydrophilic binder, (2) a water soluble acid salt, (3) a cationic component (4) a luminescent component and (5) a biocide, and the fourth coating situated on top of the th
Abstract: A conductive ink composition comprised of (1) an acid salt; (2) a conductive quaternary compound; (3) a viscosity modifying compound; (4) a lightfastness component; (5) a lightfastness antioxidant; and (6) a colorant.
Type:
Grant
Filed:
April 27, 1999
Date of Patent:
August 1, 2000
Assignee:
Xerox Corporation
Inventors:
Raymond W. Wong, Shadi L. Malhotra, Marcel P. Breton
Abstract: A process for the preparation of polymers which comprises generating a solution of water and polyvinyl alcohol with acetate groups; adding thereto a mixture of an alkali metal iodide and iodine; adding thereto initiator, and optional crosslinking agent; adding monomer, a mixture of monomers, or a monomer/polymer mixture; homogenizing, and polymerizing; and wherein there is formed an iodide/iodine/acetate complex prior to said polymerizing.
Type:
Grant
Filed:
February 2, 1998
Date of Patent:
July 25, 2000
Assignee:
Xerox Corporation
Inventors:
Thomas E. Enright, George Liebermann, Scott M. Silence, K. Derek Henderson, Hadi K. Mahabadi, Bernard A. Kelly
Abstract: A toner comprised of resin, colorant and a surface additive mixture comprised of two coated silicas, and a coated metal oxide.
Type:
Grant
Filed:
June 28, 1999
Date of Patent:
July 11, 2000
Assignee:
Xerox Corporation
Inventors:
Michael J. Duggan, K. Derek Henderson, Amy L. Stamp, Scott M. Silence, William H. Hollenbaugh, Jr., Edward J. Gutman, Bernard Grushkin, John G. Ruhland
Abstract: An aqueous ink composition comprised of (1) a quaternary compound selected from the group consisting of (a) imidazolinium quaternary salts, (b) phosphonium quaternary salts, and (c) an ammonium quaternary salt; (2) a liquid ink vehicle; (3) a paper-curl reducing compound; (4) a lightfastness component; (5) a lightfastness antioxidant; (6) a substantially water soluble organic salt or a substantially water soluble inorganic salt; (7) a biocide; and (8) a colorant.
Type:
Grant
Filed:
April 27, 1999
Date of Patent:
July 11, 2000
Assignee:
Xerox Corporation
Inventors:
Shadi L. Malhotra, James D. Mayo, Marcel P. Breton
Abstract: A carrier composition comprised of a core and coating thereover comprised of a polymer composite, a conductive component, and a matrix resin, and a second resin free of said conductive component.
Type:
Grant
Filed:
March 1, 1999
Date of Patent:
July 4, 2000
Assignee:
Xerox Corporation
Inventors:
Michael J. Duggan, Scott M. Silence, K. Derek Henderson, John G. VanDusen
Abstract: A process for the preparation of colored toners which comprises mixing a first toner comprised of resin, pigment particles, charge additive, and surface additives, with a second toner comprised of resin, pigment particles, and charge additive, and wherein the resulting colored toners contain from about 0.05 to about 0.5 weight percent of surface additives.
Type:
Grant
Filed:
May 26, 1995
Date of Patent:
June 6, 2000
Assignee:
Xerox Corporation
Inventors:
Charles G. Dickerson, Jeffrey L. DeBarr, Judith M. Vandewinckel
Abstract: A ink composition containing (1) a solid carbamate compound; (2) an alcohol compound with a melting point of from about 25.degree. C. to about 90.degree. C.; (3) a lightfastness component; (4) a lightfastness antioxidant; and (5) a colorant.
Type:
Grant
Filed:
April 27, 1999
Date of Patent:
June 6, 2000
Assignee:
Xerox Corporation
Inventors:
Marcel P. Breton, Shadi L. Malhotra, Raymond W. Wong
Abstract: A process for the preparation of toner generated by mixing (1) a colorant dispersion preferably containing a nonionic surfactant, and (2) a latex emulsion, and wherein the latex emulsion preferably contains resin, or polymer and a surfactant, and wherein the colorant nonionic surfactant is of the Formulas (I) or (II), or optionally mixtures thereof ##STR1## wherein R.sup.1 is a hydrophobic aliphatic, or hydrophobic aromatic group; R.sup.2 is selected from the group consisting of hydrogen, alkyl, aryl, alkylaryl, and alkylarylalkyl; R.sup.3 is hydrogen or alkyl; A is a hydrophilic polymer chain, and m represents the number of A segments.
Type:
Grant
Filed:
March 1, 1999
Date of Patent:
May 30, 2000
Assignee:
Xerox Corporation
Inventors:
Beverly C. Dutoff, Paul F. Smith, Raymond W. Wong, Beng S. Ong
Abstract: An ink composition comprised of (1) a solid urea compound; (2) an alcohol; (3) a lightfastness component; (4) a lightfast antioxidant; and (5) a colorant.
Type:
Grant
Filed:
April 27, 1999
Date of Patent:
May 23, 2000
Assignee:
Xerox Corporation
Inventors:
Marcel P. Breton, Shadi L. Malhotra, Raymond W. Wong
Abstract: A process for the preparation of an unsaturated polyester which comprises (i) reacting an organic diol with a cyclic akylene carbonate in the presence of a first catalyst to thereby form a polyalkoxy diol, and (ii) optionally adding thereto a further amount of cyclic alkylene carbonate in the presence of a second catalyst, and (iii) subsequently polycondensing the resulting mixture with a dicarboxylic acid.
Type:
Grant
Filed:
July 22, 1998
Date of Patent:
May 16, 2000
Assignee:
Xerox Corporation
Inventors:
Guerino G. Sacripante, Daniel A. Foucher, J. Stephen Kittelberger, Dongming Li, Marko D. Saban, Alan E. J. Toth, Robert D. Bayley