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PREVENTION OF AQUEOUS PHASE POLYMERIZATION IN THE PREPARATION OF TONER BY SUSPENSION POLY POLYMERIZATION

IP.com Disclosure Number: IPCOM000024225D
Original Publication Date: 1979-Dec-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 1 page(s) / 38K

Publishing Venue

Xerox Disclosure Journal

Abstract

In dispersion polymerization processes for producing toner compositions for the development of electrostatographic images, it is known that carbon black can inhibit the reaction when incorporated in the monomer phase and also that some amount of polymerization of the monomer occurs in the aqueous phase producing unpigmented polymer particles.

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CEROX DISCLOSURE JOURNAL

PREVENTION OF AQUE

TION OF TONER BY SUSPENSION POLY iVERIZATION

POLYMERIZATION IN THE PREPARA-

:OUS PHASE Proposed Classification

U.S. Cl. 526/88

Int. C1. C08f 2/20

~ Robert A. Nelson

In dispersion polymerization processes for producing toner compositions for the development of electrostatographic images, it is known that carbon black can inhibit the reaction when incorporated in the monomer phase and also that some amount of polymerization of the monomer occurs in the aqueous phase producing unpigmented polymer particles.

These two disadvantages can be overcome by utilizing carbon black that has been treated to remove its inhibitory effects in the monomer phase and a small quantity of untreated carbon black in the aqueous phase to inhibit reaction therein.

Volume 4 Number 6 November/December 1979 825

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