EP0692528A2
Expired / Lapsed
EP
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Fluorescent pigmented ink composition having use in a bubble jet ink jet printer
Assignee: Pitney Bowes Inc
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Filing: 1995-07-10
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Granted: —
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Expires: 2015-07-10
Abstract
Abstract An ink composition especially suited for ink jet printers that use bubble jet technology. The ink compositions contain pigments obtained by emulsion polymerization of sub-micron size particles dispersed in water. Either fluorescent or non-fluorescent dyes can be added to the pigments. Coalescing agents, or humectants, are added to the ink formulations to improve the film forming properties as well as prevent premature drying. Surfactants are added for dispersion stabilization.
Inventors
- 👤 Judith D. Auslander
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 18:10
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
55 words
An ink composition for ink jet printers that operate on the bubble jet principal, the composition comprising: a) 10 to 50% aqueous emulsion of emulsion polymerized latex based pigments having 0.2 to 1.4% fluorescent dye by total weight, b) 10 to 15% humectant, c) 3-9% of a non ionic surfactant, and d) the balance water.
Claim 2
Dependent Claim
15 words
The ink composition of Claim 1 further including 0.5 to 1% of a film former.
Claim 3
Dependent Claim
17 words
The ink composition of Claim 1 wherein said aqueous emulsion is formed from a water insoluble tetrapolymer.
Claim 4
Dependent Claim
15 words
The ink composition of Claim 3 wherein said composition contains 20 to 30% aqueous emulsion.
Claim 5
Dependent Claim
19 words
The ink composition of Claim 1 wherein the particle size of said pigment is from 0.2 to 0.8 microns.
Claim 6
Dependent Claim
18 words
The ink composition of Claim 5 wherein the viscosity of the composition is from 2 to 15 cps.
Claim 7
Dependent Claim
16 words
The ink composition of Claim 6 wherein the composition has a pH between 4 and 8.
Claim 8
Dependent Claim
62 words
The ink composition of Claim 3 wherein said water insoluble tetrapolymer comprises 52 to 65% water insoluble vinyl monomer free of polar groups, 25 to 35% acylonitrile, 1.5 to 4.5% vinyl monomer containing sulfonate groups and 5.0 to 15% polar vinyl monomers selected from the group consisting of polar acrylate esters, vinyl acetate and substituted acrylamide containing OH or carboxylic ester groups.
Claim 9
Dependent Claim
18 words
The ink composition of Claim 2 wherein the film former is a xanthene gum or an acrylic resin.
References Cited (Backward Citations)
US4849774A
Cited
US5215679A
Cited
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