Solid developer for electrostatic latent images
First Claim
1. A SOLID ELECTROSTATOGRAPHIC DEVELOPER MATERIAL COMPRISING PARTICLES, SAID PARTICLES INCLUDING FINELY-DIVIDED TONER MATERIAL HAVING A PARTICLE SIZE OF UP TO ABOUT 30 MICRONS, A MELTING POINT OF AT LEAST ABOUT 110*F, A MELT VISCOSITY OF LESS THAN ABOUT 2.5 X 10**-4 POISE AT TEMPERATURES UP TO ABOUT 450*F, SAID TONER MATERIAL COMPRISING A COLORANT SELECTED FROM THE GROUP CONSISTING OF PIGMENTS, DYES, AND MIXTURES THEREOF, A THERMOPLASTIC RESIN CONSISTING ESSENTIALLY OF A VINYL POLYMER HAVING A MELTING POINT OF AT LEAST ABOUT 110*F, AND FROM ABOUT 5 PERCENT TO ABOUT 55 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF SAID VINYL POLYMER, OF AN ARYLSULFONAMIDE FORMALDEHYDE ADDUCT HAVING A MELTING POINT BETWEEN ABOUT 50*F AND ABOUT 250*F AND HAVING THE GENERAL STRUCTURE
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Abstract
A finely-divided low melting toner comprising a colorant, a thermoplastic resin comprising a vinyl resin, and at least one arylsulfonamide formaldehyde adduct. Developer mixtures comprising said toner electrostatically clinging to the surface of carrier surfaces and processes of developing electrostatic latent images therewith are also disclosed.
20 Citations
10 Claims
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1. A SOLID ELECTROSTATOGRAPHIC DEVELOPER MATERIAL COMPRISING PARTICLES, SAID PARTICLES INCLUDING FINELY-DIVIDED TONER MATERIAL HAVING A PARTICLE SIZE OF UP TO ABOUT 30 MICRONS, A MELTING POINT OF AT LEAST ABOUT 110*F, A MELT VISCOSITY OF LESS THAN ABOUT 2.5 X 10**-4 POISE AT TEMPERATURES UP TO ABOUT 450*F, SAID TONER MATERIAL COMPRISING A COLORANT SELECTED FROM THE GROUP CONSISTING OF PIGMENTS, DYES, AND MIXTURES THEREOF, A THERMOPLASTIC RESIN CONSISTING ESSENTIALLY OF A VINYL POLYMER HAVING A MELTING POINT OF AT LEAST ABOUT 110*F, AND FROM ABOUT 5 PERCENT TO ABOUT 55 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF SAID VINYL POLYMER, OF AN ARYLSULFONAMIDE FORMALDEHYDE ADDUCT HAVING A MELTING POINT BETWEEN ABOUT 50*F AND ABOUT 250*F AND HAVING THE GENERAL STRUCTURE
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2. A solid electrostatographic developer material according to claim 1 wherein said vinyl polymer has a weight average molecular weight between about 3,000 to About 500,000.
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3. A solid electrostatographic developer material according to claim 1 wherein said finely-divided toner particles contain at least about 25 percent by weight, based on the total weight of said thermoplastic resin in said toner, of a styrene resin.
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4. A solid electrostatographic developer material according to claim 1 wherein said arylsulfonamide formaldehyde adduct is selected from the 2-methylbenzene sulfonamide formaldehyde adduct and the 4-methylbenzene sulfonamide formaldehyde adduct.
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5. A solid electrostatographic developer material according to claim 1 wherein said colorant is present in an amount of from about 1 to about 20% by weight of said toner material.
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6. A solid electrostatographic developer material according to claim 1 wherein said resin is a copolymer of styrene and an alkyl methacrylate.
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7. A SOLID ELESTROSTATOGRAPHIC DEVELOPER MATERIAL ACCORDING TO CLAIM 1 WHEREIN SAID FINELY-DIVIDED TONER PARTICLES ARE ELECTROSTATICALLY COATED ON THE SURFACE OF CARRIER PARTICLES
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8. A solid electrostatographic developer material according to claim 7 wherein said developer material comprises about 1 part by weight of said finely-divided toner particles and from about 10 to about 200 parts by weight of said carrier particles.
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9. A solid electrostatographic developer material comprising finely-divided toner particles electrostatically coated on a carrier surface capable of retaining said toner particles by electrostatic attraction, said toner particles having a particle size range of up to about 30 microns, a blocking temperature of at least about 110*F, a melt viscosity less than about 2.5 X 10 4 poise at temperatures up to about 450*F, and comprising a colorant selected from the group consisting of a pigment and a dye, a thermoplastic resin consisting essentially of a vinyl polymer having a melting point at least about 110*F, and from about 5 percent to about 55 percent by weight, based on the weight of said vinyl polymer, of an arylsulfonamide formaldehyde adduct having a melting point between about 50*F and about 250*f and having the general structure
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10. A solid electrostatographic developer material comprising carrier particles and toner particles, said toner particles having a melting point of at least about 110*F, said toner particles comprising a colorant selected from the group consisting of dyes, pigments, and mixtures thereof, a thermoplastic resin consisting essentially of a vinyl polymer having a melting point of at least about 110*F, and from about 5 percent to about 55 percent by weight, based on the weight of said vinyl polymer, of an arylsulfonamide formaldehyde adduct having a melting point between about 50*F and about 250*F and having the general structure
Specification
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- Resources
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Current AssigneeRobert A. Braun, Robert Mermelstein
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Original AssigneeRobert A. Braun, Robert Mermelstein
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InventorsMermelstein, Robert, Braun, Robert A.
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Primary Examiner(s)Lovering, Richard D.
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Application NumberUS05/336,158Time in Patent Office862 DaysField of Search252/62.1P 260/3.8RUS Class Current430/108.5CPC Class CodesG03G 9/09775 containing atoms other than...
