EP0526012A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Dye-set for polysaccharide-containing ink-jet printing inks
Assignee: HP Inc
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Filing: 1992-07-07
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Granted: —
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Expires: 2012-07-07
Abstract
Abstract A set of dyes is provided for use in vehicles employing high molecular weight saccharides. The dye-set comprises about 1 to 4% xanthene magenta, about 0.9 to 2% of a mixture of Acid Yellow 23 and Direct Yellow 86, and about 0.75 to 2.5 of Acid Blue 9 or a mixture of Acid Blue 9 and a copper phthalocyanine dye containing not more than about 25% copper phthalocyanine. The particular dye-set evidences the following properties: good crusting resistance, good stability, the proper viscosity, the proper surface tension, recognizable secondaries, high color saturation, little color-to-color bleed, rapid drytime, no negative reaction with the vehicle, be highly soluble in the vehicle, consumer-safe, and low strike-through.
Inventors
- 👤 Loren E. Johnson
- 👤 John R. Moffatt
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 01:01
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
70 words
An improved ink-jet dye-set for ink-jet printing comprising at least one of the following magenta, yellow, and cyan dyes: (a) said magenta dye comprising a xanthene magenta dye; (b) said yellow dye comprising a mixture of Acid Yellow 23 and Direct Yellow 86 yellow dyes; and (c) said cyan dye comprising a mixture of Acid Blue 9 and a copper phthalocyanine dye containing not more than about 25% copper phthalocyanine.
Claim 2
Dependent Claim
70 words
An improved ink-jet dye-set for ink-jet printing comprising at least one of the following magenta, yellow, and cyan dyes: (a) said magenta dye comprising a xanthene magenta dye; (b) said yellow dye comprising a mixture of Acid Yellow 23 and Direct Yellow 86 yellow dyes; and (c) said cyan dye comprising a mixture of Acid Blue 9 and a copper phthalocyanine dye containing not more than about 25% copper phthalocyanine.
Claim 3
Dependent Claim
112 words
An ink-jet ink-set comprising the magenta, yellow, and cyan dyes of Claim 1 for use with ink-jet printers, each ink comprising a vehicle and at least one dye: (a) said vehicle containing at least one high molecular weight polysaccharide; (b) said magenta ink consisting essentially of about 1 to 4% xanthene magenta dye; (c) said yellow ink consisting essentially of about 0.9 to 2% of a mixture of Acid Yellow 23 and Direct Yellow 86 dyes; and (d) said cyan ink consisting essentially of about 0.75 to 2.5% of Acid Blue 9 dye or of a mixture of Acid Blue 9 dye and up to about 25% of a copper phthalocyanine dye.
Claim 4
Dependent Claim
25 words
The ink-set of Claim 2 wherein said xanthene magenta dye is selected from the group consisting of Acid Red 52 and Acid Red 289 dyes.
Claim 5
Dependent Claim
27 words
The ink-set of Claim 2 wherein said mixture of Acid Yellow 23 and Direct Yellow 86 dyes ranges in ratio from about 40:60 to 60:40 of AY23:DY86.
Claim 6
Dependent Claim
26 words
The ink-set of Claim 4 wherein said ratio is about 50:50 and is present in said ink in an amount ranging from about 1 to 1.5%.
Claim 7
Dependent Claim
17 words
The ink-set of Claim 2, wherein both Acid Yellow and Direct Yellow 86 dyes include tetramethylammonium counter-ion.
Claim 8
Dependent Claim
25 words
The ink-set of Claim 2 wherein said copper phthalocyanine dye is selected from the group consisting of Direct Blue 86 and Direct Blue 199 dyes.
Claim 9
Dependent Claim
13 words
The ink-set of Claim 7, wherein said copper phthalocyanine dye includes lithium counter-ion.
Claim 10
Dependent Claim
65 words
The ink-set of Claim 2 wherein said vehicle comprises: (a) about 0.05 to 0.75 wt% of a high molecular weight polysaccharide having a molecular weight of at least about 10,000; (b) about 0.05 to 5 wt% of at least one member selected from the group consisting of zwitterionic surfactants and non-ionic amphiphiles; (c) about 0.5 to 20 wt% of 1,5-pentanediol; and (d) the balance water.
Claim 11
Dependent Claim
67 words
The ink-set of Claim 9 wherein said high molecular weight polysaccharide is selected from the group consisting of alginic acid, mannomuronic acid, carrageenan, guar and xanthan gums, dextran, chitin, and chitosan and wherein said amphoteric surfactants are pH-sensitive surfactants selected from the group consisting of N,N-dimethyl-N-dodecyl amine oxide, N,N-dimethyl-N-tetradecyl amine oxide, N,N-dimethyl-N-hex-adecyl amine oxide, N,N-dimethyl-N-octadecyl amine oxide, N,N-dimethyl-N-(Z-9-octadecenyl)-N-amine oxide, N-dodecyl-N,N-dimethyl glycine, and an acetylenic polyethylene oxide surfactant.
References Cited (Backward Citations)
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