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PROCESSES FOR THE MODIFICATION OF ENCAPSULATED TONERS BY INTERFACIAL POLYMERIZATION AT SOLID-SOLID INTERFACES

IP.com Disclosure Number: IPCOM000025893D
Original Publication Date: 1988-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 82K

Publishing Venue

Xerox Disclosure Journal

Abstract

A method for modifying the electrical properties of encapsulated single component cold pressure fixable toner compositions which comprises attaching conductive carbon black materials to the polymeric surfaces of the toner particles. More specifically, the modification process comprises treating the toner particles and the conductive carbon black particles with appropriate reagents that become physically or chemically absorbed onto the surfaces of the particles, and subsequently initiating a polymerization reaction between the reagents at the interface formed between the toner particles and the carbon black particles. The polymerization reaction results in the attachment of the carbon black particles to the toner particles.

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XEROX DISCLOSURE JOURNAL

PROCESSES FOR THE MODIFICATION Proposed Classification OF ENCAPSULATED TONERS BY U.S. C1.430/138 INTERFACIAL POLYMERIZATION AT Int. C1. G03c 1/72

Marcel breton SOLID-SOLID INTERFACES

A method for modifying the electrical properties of encapsulated single component cold pressure fixable toner compositions which comprises attaching conductive carbon black materials to the polymeric surfaces of the toner particles. More specifically, the modification process comprises treating the toner particles and the conductive carbon black particles with appropriate reagents that become physically or chemically absorbed onto the surfaces of the particles, and subsequently initiating a polymerization reaction between the reagents at the interface formed between the toner particles and the carbon black particles. The polymerization reaction results in the attachment of the carbon black particles to the toner particles.

In one specific example, carbon black materials are first treated with an effective amount of a diamine or a triamine, and thereafter any excess amine is removed from the resulting mixture. Subsequently, toner particles comprised of resins and pigments are treated with a saturated solution of an acid chloride and then dipped into the aforementioned mixture of the treated carbon black particles causing a reaction between the acid chloride and the amine, and resulting in the carbon black binding to the toner particles. Also, to increase inter...