Patent EP0839883A2 successfully refreshed from Google Patents.
EP0839883A2
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Counterion substitution in macromolecular chromophores for ink-jet printing
Assignee: HP Inc
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Filing: 1997-10-15
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Granted: —
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Expires: 2017-10-15
Abstract
Abstract The ink of the invention comprises a vehicle and a colorant. The colorant is a water-insoluble macromolecule that has been chemically modified to be water soluble by addition of functional groups to the surface of the chromaphores resulting in water soluble colorant particles. The resulting chromaphore is called a macromolecular chromaphore (MMC). The performance of these MMCs is improved by substitution of (a) the normal counter-cations with substituted ammonium cations or (b) the normal counter-anions with any of a variety of organic and inorganic anions. The inks described herein demonstrate high edge acuity, high optical density, fast drying times, high waterfastness, and high smearfastness.
Inventors
- 👤 Joseph W. Tsang
- 👤 John R. Moffatt
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 11:41
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; B; B41; B41J; B41J2/00; B41J2/005; B41J2/01
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
43 words
An ink-jet ink for ink-jet printing which comprises: (a) a vehicle, and (b) at least one water-soluble ionic colorant and a corresponding counterion,
wherein said ionic colorant is selected from the group consisting of anionic
functionalized colorant particles and cationic functionalized colorant particles.
Claim 2
Dependent Claim
33 words
The ink-jet ink of Claim 1, wherein said ionic colorant comprises a colorant
particle which has anions on the surface, wherein said anions are selected from the
group consisting of sulfonate or carboxylate.
Claim 3
Dependent Claim
66 words
The ink-jet ink of Claim 2, wherein said corresponding counterion is a cation
selected from the group consisting of N,N',N"-substituted ammonium ions, N,N',N"-unsubstituted
ammonium ions, N,N',N",N"'-substituted amides of 1,w-amino acids,
N,N',N",N"'-unsubstituted amides of 1,w-amino acids, N,N'-substituted lactams of 1,w-amino
acids, N,N'-unsubstituted lactams of 1,w-amino acids, N,N',N"-substituted esters
of 1,w-amino acids, N,N',N"-unsubstituted esters of 1,w-amino acids, N,N'-substituted
lactones of 1,w-amino acids, and N,N'-unsubstituted lactones of 1,w-amino
acids.
Claim 4
Dependent Claim
24 words
The ink-jet ink of Claim 3, wherein said corresponding counterion is selected
from the group consisting of dimethyl ammonium, trimethyl ammonium, and dipropyl
ammonium.
Claim 5
Dependent Claim
26 words
The ink-jet ink of Claim 1, wherein said ionic colorant is a colorant particle
which has cations on the surface, wherein said cations are ammonium ions.
Claim 6
Dependent Claim
55 words
The ink-jet ink of Claim 1, wherein said ionic colorant comprises cationic
functionalized colorant particles and said corresponding counterion is an anion selected
from the group consisting of halide, sulfate, nitrate, phosphate, sulfonate, carboxylate,
carbonate, bicarbonate, borate, tetraborate, tetrafluoroborate, methane sulfonate,
methyl benzene sulfonate, phosphite, phosphonate, hexaflurophosphonate,
phosphene, phenolate, perchlorate, tungstate, molybdate, and silicate ions.
Claim 7
Dependent Claim
16 words
A method of ink-jet printing comprising printing on a medium with said ink of
Claim 1.
Claim 8
Dependent Claim
63 words
A method for preparing said ink-jet ink of Claim 1 for ink-jet printing comprising: (a) providing colorant particles; (b) functionalizing said colorant particles to form a macromolecular
chromaphore having either anionic functionalities or cationic functionalities; (c) adding a compatible counterion to said macromolecular chromaphore
using ion exchange techniques; (d) mixing said macromolecular chromaphore and associated counterion
with said vehicle to form said ink.
References Cited (Backward Citations)
No citation records indexed.
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