Dry toner with gelled resin for high speed printer
AssigneeLexmark International, Inc.
InventorsBrian W. Baird, George P. Marshall, Michael G. Miller, James C. Minor
Life of this patent
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Abstract
A toner for a two component developer used in a high speed computer output printer has about 20 parts gelled styrene/acrylic resin, 40 parts acrylate resin, about 13 parts hydrogenated wood rosin ester with pentaerythritol, and about 18 parts rosin ester of pentaerythritol, as well as carbon black and a charge control agent. Exceptional improvement is noted in carrier deterioration, fuser roller life and photoconductor filming.
Claims4
A dry toner comprising a resin body, a charge control agent, and carbon black, said resin body comprising about 40 parts by weight of a copolymer of n-butyl methacrylate and methyl methacrylate, and about 20 parts by weight of a copolymer of about 80 parts by weight styrene and about 20 parts by weight butyl acrylate about 80 percent cross linked with divinyl benzene, an ester with pentaerythritol rosin of nearly completely hydrogenated wood rosin, and an ester of rosin with pentaerythritol.
A method of toning a charged image in an IBM 3825 printer comprising toning said image with a two component developer of carrier and a toner comprising a dry toner comprising a resin body, a charge control agent, and carbon black, said resin body comprising about 40 parts by weight of a copolymer of n-butyl methacrylate and methyl methacrylate, and about 20 parts by weight of a copolymer of about 80 parts by weight styrene and about 20 parts by weight butyl acrylate about 80 percent cross linked with divinyl benzene, an ester with pentaerythritol rosin of nearly completely hydrogenated wood rosin, and an ester of rosin with pentaerythritol.
Dependencies are inferred from the claim text.