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VIBRANT COLOR SET FOR THERMAL INK JET INKS

IP.com Disclosure Number: IPCOM000027634D
Original Publication Date: 1998-Jun-30
Included in the Prior Art Database: 2004-Apr-08
Document File: 2 page(s) / 94K

Publishing Venue

Xerox Disclosure Journal

Abstract

Vibrant color sets are needed for color thermal ink jet printing applications. Some existing color sets have disadvantages such as the need to provide excess buffering in inks containing dyes which hydrolyze and liberate acid, or the need to provide buffering for other reactive dyes. Compatibility of colorants with ink components such as polyquaternary conductive polymers is also desirable.

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XEROX DISCLOSURE JOURNAL

VIBRANT COLOR SET FOR THERMAL INK JET INKS
Kurt B. Gundlach
Luis A. Sanchez
Richard L. Colt
Maura A. Sweeney

Proposed Classification
U. S. C1. 106/20R Int. C1. C09d 11/00

Vibrant color sets are needed for color thermal ink jet printing applications. Some existing color sets have disadvantages such as the need to provide excess buffering in inks containing dyes which hydrolyze and liberate acid, or the need to provide buffering for other reactive dyes. Compatibility of colorants with ink components such as polyquaternary conductive polymers is also desirable.

One color set which enables vibrant color prints is as follows:

Yellow: Acid Yellow 23 dye; Cyan: Acid Blue 9 dye; and Magenta: mixture of Acid Red 249 dye and Acid Red 52 dye

Extensive print testing of inks containing this color set verified exceptional thermal ink jet peiformance. An ink composition was prepared by simple mixing of the following ingredients:

roll mill 30 minutes

XEROX DISCLOSURE JOURNAL - Vol. 23, No. 3 MaylJune 1998 109

[This page contains 1 picture or other non-text object]

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VIBRANT COLOR SET FOR THERMAL INK JET INKS (CONT'D)

0 bisphenol-A derivative, molecular weight 18,500, of the formula

LH3

+ containing 75 wt.% acetylethanolamine and 25 wt% water

4 aqueous solution containing 40 wt% polydiallyl dimethyl ammonium chloride polymer (MW=5,000)

v aqueous solution containing 8.9 wt% dye and 91.1 wt.% water

6 aqueous solution containing 10 wt.% dye and 90...