Browse Prior Art Database

TONER COMPOSITIONS WITH ELECTRON DONER AND ELECTRON ACCEPTOR CHROMOPHORES

IP.com Disclosure Number: IPCOM000025696D
Original Publication Date: 1987-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 73K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is a toner composition which can be selected for incorporation into a xerographic imaging apparatus without silicone oils therein; which composition is comprised of two copolymers, one containing electron donor chromophores and the other with electron acceptor chromophores. The aforementioned copolymers form charge transfer complexes with thermally reversible aggregation properties.

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XEROX DISCLOSURE JOURNAL

TONER COMPOSITIONS WITH Proposed Classification ELECTRON DONER AND ELECTRON
ACCEPTOR CHROMOPHORES
Lupu Alexandru

U.S. C1.430/109 Int. C1. G03g 9/00

Disclosed is a toner composition which can be selected for incorporation into a xerographic imaging apparatus without silicone oils therein; which composition is comprised of two copolymers, one containing electron donor chromophores and the other with electron acceptor chromophores. The aforementioned copolymers form charge transfer complexes with thermally reversible aggregation properties.

Also, a toner with the above referred to copolymers enables compositions with acceptable mechanical properties and excellent blocking temperature characteristics. In addition, heating of the charge transfer complex results in disassociation, and a blend of two low molecular weight flexible chains with low melt viscosities. Accordingly, a toner composition containing these blends has a very low minimum fixing temperature. Additionally, compositions containing one low molecular weight chain with proper surface energy properties permits the formulation of oilless toners that can be selected for xerographic imaging processes wherein the use of release fluids such as silicone oils are avoided.

More specifically, there can be formulated a toner composition containing resin particles with about 46 percent by weight of a styrene copolymer containing 3 percent by weight of pendant carbazolyl groups, and 46 percent...