Readily Deinkable Toners

a technology of toners and printers, applied in the field of plant or animal based (e. g. soybased) toners, can solve the problems of poor enzymatic system, marginal deinking features of deinking systems, and considerable challenge in removing toners from printed surfaces

Inactive Publication Date: 2010-04-15
BATTELLE MEMORIAL INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The soy-based toners demonstrate enhanced deinkability, enabling more efficient recycling of printed paper without the need for costly flotation processes, resulting in cost savings and environmental benefits.

Problems solved by technology

Current toners are not formulated with this feature, so in the manufacture of secondary fibers from office waste paper a considerable challenge is posed in removing toners from the printed surface.
However, their deinking features were marginal in a typical chemical deinking system and very poor in enzymatic systems.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013]The present invention provides soy-based toners for use in office copiers and laser printers. The examples provide for resin and toner compositions based on soybean oil and / or protein components that were synthesized and characterized establish ready deinkability. Selection of resin composition was based on various considerations such as glass transition temperature (Tg), mechanical and rheological properties and propensity to attack by deinking chemicals and enzymatic agents. Resins were characterized by melt rheology using a Rheometer, melting and Tg by DSC (Differential Scanning Calorimeter) and other relevant molecular and physical parameters. Formulates of 100-200 gram quantities of about 4-6 typical toner compositions using carbon black and flow additive using the resins. The toners were tested for particle size and distribution, triboelectric charge density, hand toning, melt rheology, and Tg. Copier tests were made to show printability and image quality of toners

[0014]...

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Abstract

Broadly the invention provides for a deinkable toner composition, an image made with the deinkable toner, and a method for making the toner including a coloring agent; a thermoplastic polymer; and a protein. In another embodiment the toner includes a coloring agent and a thermoplastic polymer where the protein has been incorporated into the polymer itself. In typical embodiments the protein is derived from soybeans but may be from other plant or animal sources. Typically the toner has a positive triboelectric charge of between about 10 to about 40 microCoulomb / g, or a negative triboelectric charge of between about 10 to about 40 microCoulomb / g.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a divisional of application Ser. No. 10 / 546,744, filed on Jul. 18, 2006, which claims priority to and the benefits of PCT / US2004 / 006023, filed on Feb. 27, 2004, which claims priority to and the benefits of U.S. Provisional Application Ser. No. 60 / 450,979 filed Feb. 27, 2003; the disclosures of which are hereby incorporated by reference as if completely rewritten herein.FIELD OF THE INVENTION[0002]The present invention provides plant or animal based (e.g. soy-based) toners for use in office copiers, laser printers, and the like. The invention includes resin and toner compositions based on plant or animal oils and / or protein components.BACKGROUND OF THE INVENTION[0003]Briefly, there is a need to impart inherent “ready deinkabilty” feature to toners used in office copiers and laser printers. Current toners are not formulated with this feature, so in the manufacture of secondary fibers from office waste paper a considerabl...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): C08G73/00G03G9/087
CPCC08G69/10C08G69/34G03G9/08797G03G9/08795G03G9/08775G03G9/08766G03G9/0823C08G69/36C08L77/00C08L89/00G03G9/0819G03G9/0821C08L2666/26C08L2666/20C08L2666/02
InventorVIJAYENDRAN, BHIMA R.BENECKE, HERMAN P.DROTLEFF, ELIZABETHELHARD, JOEL D.ROBBINS, J. DAVIDCAFMEYER, JEFFREYMUELLERLEILE, JOAN
OwnerBATTELLE MEMORIAL INST