EP0465124A1
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Ink compositions
Assignee: Xerox Corp
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Filing: 1991-06-27
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Granted: —
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Expires: 2011-06-27
Abstract
Abstract Disclosed is an ink composition which comprises an aqueous liquid vehicle and particles of an average diameter of 100 nanometers or less which comprise micelles of block copolymers of the formula ABA, wherein A represents a hydrophilic segment and B represents a hydrophobic segment, and wherein dye molecules are covalently attached to the micelles, the dye molecules being detectable when exposed to radiation outside the visible wavelength range. Optionally, silica is precipitated within the micelles. In a specific embodiment, the dye molecules are substantially colorless. In another specific embodiment, the ink also contains a visible colorant.
Inventors
- 👤 Françoise M. Winnik
- 👤 Anthony R. Davidson
- 👤 Jon W-P. Lin
- 👤 Melvin D. Croucher
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 04:57
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
52 words
An ink composition, which comprises an aqueous liquid vehicle and particles of an average diameter of 100 nanometers or less which comprises micelles of block copolymers of the formula ABA, wherein A represents a hydrophilic segment, and B represents a hydrophobic segment, and wherein dye molecules are covalently attached to the micelles.
Claim 2
Dependent Claim
164 words
An ink composition according to claim 1, wherein the A segments of the block copolymers are of monomers of oxyethylenes, aminoethylenes, vinyl carboxylic acids or their corresponding esters of the general formula: wherein R₁ and R₂ are independently selected from hydrogen and alkyl groups with from 1 to 20 carbon atoms, oxazol ines of the general formula wherein R is hydrogen, an alkyl group with from 1 to 6 carbon atoms, or benzyl and the ring has from 2 to 7 carbon atoms in addition to the carbon atom situated between the nitrogen and oxygen atoms, acrylamides of the general formula wherein R₁ is hydrogen, methyl, or ethyl, and R₂ and R₃ are independently selected from hydrogen, alkyl groups with from 1 to 4 carbon atoms, hydroxyalkyl groups with from 1 to 4 carbon atoms, and amino-substituted alkyl groups, vinyl ethers of the general formula wherein R₁ is hydrogen, methyl or ethyl, and R₂ is hydroxy-substituted alkyl groups, amino-substituted alkyl groups, or mixtures thereof.
Claim 3
Dependent Claim
35 words
An ink composition according to claim 1 or 2, wherein the B segment of the block copolymers is of monomers of oxypropylenes, vinyl monomers, acrylic monomers and esters of monocarboxylic acids, olefins or mixtures thereof.
Claim 4
Dependent Claim
76 words
An ink composition according to any preceding claim, wherein the block copolymers are ABA block copolymers, wherein the A blocks are polyethylene oxide, and the B block is polypropylene oxide; ABA block copolymers wherein the A blocks are 2-hydroxyethyl vinylether polymers, and the B block is a polymer of butyl vinyl ether or ABA block copolymers wherein the A blocks are polyethylene oxide and the B block is a polymer of 2-hydroxyethyl methacrylate, or mixtures thereof.
Claim 5
Dependent Claim
16 words
An ink composition as claimed in any preceding claim, wherein the micelles have silica precipitated therein.
Claim 6
Dependent Claim
24 words
An ink composition as claimed in any preceding claim, wherein the dye molecules are detectable when exposed to radiation outside the visible wavelength range.
Claim 7
Dependent Claim
14 words
An ink composition according to claim 5, wherein the dye molecules are substantially colorless
Claim 8
Dependent Claim
18 words
An ink composition according to any preceding claim, wherein at least some of the particles are visibly colored.
Claim 9
Dependent Claim
15 words
An ink composition according to claim 8, wherein the colored dye is a reactive dye.
Claim 10
Dependent Claim
20 words
An ink composition as claimed in any preceding claim, containing a visible colorant consisting of pigments, dyes, or mixtures thereof.
Claim 11
Dependent Claim
21 words
An ink marking process in which an ink as claimed in any preceding claim is used as the ink droplet medium.
Claim 12
Dependent Claim
48 words
A printing process which comprises (1) incorporating into an ink jet marking apparatus an ink composition as claimed in any of claims 1 to 10, and (2) causing droplets of the ink to be ejected in an imagewise pattern onto a substrate, thereby generating images on the substrate.
References Cited (Backward Citations)
US3784502A
Cited
EP0092578B1
Cited
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