Browse Prior Art Database

LIQUID INK DEVELOPER

IP.com Disclosure Number: IPCOM000026456D
Original Publication Date: 1992-Feb-29
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 96K

Publishing Venue

Xerox Disclosure Journal

Abstract

Migration imaging (XDM) is well known and described, for example, in US. Patent 3,975,195. Inks have been prepared for developing electrostatic latent images on migration imaging members. Preparation was effected by ball-milling ink concentrate ingredients for 48 hours in polyethylene jars with 114 inch stainless steel balls. These ink concentrates were diluted with ISOPAR G (available from Exxon) at a ratio of 50 grams of concentrate to 2,500 ml of ISOPAR G. Ink formulations containing pigment, soluble polymer serving a dual role as pigment dispersant and binder, and charge control agents (C.C.A.) to ensure positively charged particles were prepared as follows:

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XEROX DISCLOSURE JOURNAL

LIQUID INK DEVELOPER

Stephan Drappel James M. Duff

Proposed Classification
U.S. C1.430/119 Int. C1. G03g 9/08

Migration imaging (XDM) is well known and described, for example, in US. Patent 3,975,195. Inks have been prepared for developing electrostatic latent images on migration imaging members. Preparation was effected by ball- milling ink concentrate ingredients for 48 hours in polyethylene jars with 114
inch stainless steel balls. These ink concentrates were diluted with ISOPAR G (available from Exxon) at a ratio of 50 grams of concentrate to 2,500 ml of ISOPAR G. Ink formulations containing pigment, soluble polymer serving a dual role as pigment dispersant and binder, and charge control agents (C.C.A.) to ensure positively charged particles were prepared as follows:

COLOURED INK FORMULATIONS (POSITIVELY CHARGED PARTICLES)

CYAN

Pigment: Phthalo Blue G-NCNF (BASF) 2.5g Polymer: Pliolite OMS (Goodyear Chemical) 5.0g C .C .A. : Iron Naphthenate, 6% (Nuodex) 1.25g Isopar G: lOOml Working Ink QN: 1550 pC/g
YELLOW
Pigment: Diarylide Yellow AAMX (Dominion Colour co)2.5g Polymer:
C .C .A.:

               Pliolite OMS (Goodyear Chemical) 5.0g Witconate 605 A (Witco Chemical) 0.50g Zirconium Octoate, 6% (Nuodex) 1.og Isopar G: lOOml Working Ink Q/M: 625 pC/g

MAGENTA

Pigment: Lithol Rubine (Dominion Colour Co.) 2.5g

C .C .A.: Iron Naphthenate, 6% (Nuodex) 1.25g Isopar G. lOOm1

Working Ink QN: 700 pC/g

Polymer: Pliolite OMS (Goodyear Chemical) 5.og

XEROX DISCLO...