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Browse Prior Art Database

POSITIVELY CHARGED TONERS

IP.com Disclosure Number: IPCOM000024129D
Original Publication Date: 1979-Oct-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 200K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is a toner composition comprised of a resin, a pigment and polyvinyl pyridine salt. Such salt being selected from the group consisting of: CH- CH2 -± CH - CH2,,) -Xz (2) CH- CH2 (3) CH-CH2 wherein R is hydrogen or an alkyl group, Y is (100 - z) mole percent, Z is greater than 0 mole percent and less than 50 mole percent, and X is an anion such as

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XEROX DISCLOSURE JOURNAL

POSITIVELY CHARGED lONERS Proposed Classification

Roger N. Ciccarefli U.S. CI. 252/62.1

Int, Cl, G03g 9/00

Disclosed is a toner composition comprised of a resin, a pigment and polyvinyl pyridine salt. Such salt being selected from the group consisting of:

CH- CH

2

CH~ CH

2

(3)CH~CH 2

wherein R is hydrogen or an alkyl group, Y is (100 - z) mole percent, Z is greater than 0 mole percent and less than 50 mole percent, and X is an anion such as

chloride, bromide, iodide, sulfate or nitrate. Mole percent represents the ratio of monomer units, thus if Y is 80 mole percent, Z is 20 mole percent, which indicates that for every 100 units of Y plus Z, 80 are Y and 20 are Z. These toners as a result of the polyvinyl pyridine salt charge positively when used as a developer in

an electrostatic imaging system. The developer is typically formulated by adding a carrier to the toner composition. The carrier being comprised of any of the well- known carriers including steel and coated carriers wherein the coating is a material

such as fluoropolymer. Images of high quality are obtained when using the polyvinyl pyridine salts described, the preferred salts being poly-2-vinyl pyridine, poly-3-vinyl pyridine and poly-4-vinyl pyridine.

(2)

CH - CH

2,,)_

~~Xz

Volume 4 Number 5 September/October 1979 621

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