Patent EP0224909A2 successfully refreshed from Google Patents.
EP0224909A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Ink composition for ink-jet printer
Assignee: HP Inc
•
Filing: 1986-12-02
•
Granted: —
•
Expires: 2006-12-02
Abstract
Abstract An aqueous-based ink composition for use in ink-jet printers is disclosed. The composition comprises (a) a vehicle of about 5 to 95°,o water and the balance at least one glycol ether, such as diethylene glycol; (b) a dye, such as Food Black 2, having at least one negatively charged functional group per molecule, present in an amount up to about 10% of the vehicle composition; and (c) a cationic compound selected from the group consisting of alkanol ammonium compounds and cationic amide compounds, present in an amount such that there is at least one molecule of cationic compound for at least one of the negatively charged functional groups on the dye, the pH of the ink composition being maintained in the acidic region below about 7. The ink composition of the invention evidences minimal crusting and reduced evaporation loss of water. The solubility of anionic dyes is increased in the acidic medium over that otherwise obtainable, due to the presence of the alkanol ammonium compound or amide. The ink composition of the invention is suitably employed in any of the ink-jet printers commonly in use.
Inventors
- 👤 Adrienne R. Meuter
- 👤 Donald J. Palmer
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 22:38
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/38
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
112 words
An ink composition suitable for use in ink-jet printers comprising: (a) a venicle comprising about 5 to 95% water and the balance at least one glycol ether; ( b ) a dye having at least one negatively charged functional group per molecule, present in an amount up to about 10% of tne vehicle composition; and (c) a cationic compound selected from the group consisting of alkanol ammonium salts and amides, present in an amount such that there is at least one molecule of cationic compound for at least one of the negatively charged functional groups on the dye, the pH of the ink being maintained in the acidic region below about 7.
Claim 2
Dependent Claim
112 words
An ink composition suitable for use in ink-jet printers comprising: (a) a venicle comprising about 5 to 95% water and the balance at least one glycol ether; ( b ) a dye having at least one negatively charged functional group per molecule, present in an amount up to about 10% of tne vehicle composition; and (c) a cationic compound selected from the group consisting of alkanol ammonium salts and amides, present in an amount such that there is at least one molecule of cationic compound for at least one of the negatively charged functional groups on the dye, the pH of the ink being maintained in the acidic region below about 7.
Claim 3
Dependent Claim
33 words
Tne ink composition of Claim 1 wherein said glycol ether has a formula given by where n is an integer of 1 to 3 ana m is an integer of 1 to 4.
Claim 4
Dependent Claim
24 words
The ink composition of Claim 2 wherein said glycol ether is selected from the group consisting of diethylene glycol, triethylene glycol and polyetnylene glycols.
Claim 5
Dependent Claim
15 words
The ink composition of Claim 3 wherein said glycol ether consists essentially of diethylene glycol.
Claim 6
Dependent Claim
18 words
The ink composition of Claim 4 wherein said vehicle comprises about 50% water and the balance diethylene glycol.
Claim 7
Dependent Claim
21 words
o. The ink composition of Claim 1 wherein said dye comprises an anionic aye including at least one sulfonate functional group.
Claim 8
Dependent Claim
41 words
The ink composition of Claim 6 wherein said dye is selected from the group consisting of Food Black 2, Direct Red 9, Direct Red 227, Acid Yellow 23, Direct Yellow 86, Acid Blue 9, Direct Blue 86 and Acia Blue 105.
Claim 9
Dependent Claim
15 words
The ink composition of Claim 7 wherein said dye consists essentially of Food Black 2.
Claim 10
Dependent Claim
51 words
The ink composition of Claim 1 wherein said alkanol ammonium compound incluaes a cation represented by tne formula where at least one of R, R', ana R" comprises a carbon chain having from 1 to 5 carbon atoms, with an alcohol group associated with at least one of said carbon atoms.
Claim 11
Dependent Claim
18 words
The ink composition of Claim 9 wherein said alkanol ammonium compound includes triethanol ammonium cation having the formula
Claim 12
Dependent Claim
52 words
The ink composition of Claim 1 wherein said aye consists essentially of Food Black 2 and said cationic compound includes triethanol ammonium cation, saia cationic compound present in an amount such that less than 4 sodium ions associated with sulfonate groups on said dye molecule are displaced by said triethanol ammonium cations.
Claim 13
Dependent Claim
98 words
A process for improving the properties of an ink composition for ink-jet printers, said ink composition comprising a vehicle and a dye, said vehicle comprising about 5 to 95% water and the balance a glycol ether, wherein the improvement comprises adding a cationic compound selected from the group consisting of alkanol ammonium compounds and cationic amide compounds in an amount such that there is at least one molecule of cationic compound for at least one of the negatively charges functional groups on the dye, the pH of the composition being maintained in the acidic region below about 7.
Claim 14
Dependent Claim
98 words
A process for improving the properties of an ink composition for ink-jet printers, said ink composition comprising a vehicle and a dye, said vehicle comprising about 5 to 95% water and the balance a glycol ether, wherein the improvement comprises adding a cationic compound selected from the group consisting of alkanol ammonium compounds and cationic amide compounds in an amount such that there is at least one molecule of cationic compound for at least one of the negatively charges functional groups on the dye, the pH of the composition being maintained in the acidic region below about 7.
Claim 15
Dependent Claim
32 words
The process of Claim 12 wherein said glycol ether has a formula given by where n is an integer of 1 to 3 and m is an integer of 1 to 4.
Claim 16
Dependent Claim
24 words
The process of Claim 13 wherein said glycol ether is selected from the group consisting of aiethyl- ene glycol, triethylene glycol and polyethylene glycols.
Claim 17
Dependent Claim
14 words
The process of Claim 14 wherein said glycol ether consists essentially of diethyene glycol.
Claim 18
Dependent Claim
17 words
The process of Claim 15 wherein said vehicle comprises about 50% water and the oalance diethylene glycol.
Claim 19
Dependent Claim
19 words
The process of Claim 12 wherein said dye comprises an anionic dye including at least one sulfonate functional group.
Claim 20
Dependent Claim
40 words
The process of Claim 17 wherein said aye is selected from the group consisting of Food Black 2, Direct Red 9, Direct Red 227, Acid Yellow 23, Direct Yellow 86, Acid Blue 9, Direct Blue 86 ana Acid Blue 185.
Claim 21
Dependent Claim
14 words
The process of Claim 18 wherein said aye consists essentially of Food Black 2.
Claim 22
Dependent Claim
50 words
The process of Claim 12 wherein said alkanol ammonium compound includes a cation represented by the formula where at least one of R, R', and R" comprises a caroon chain having from 1 to 5 carbon atoms, with an alcohol group associatea with at least one of saia carbon atoms.
Claim 23
Dependent Claim
17 words
The process of Claim 20 wherein said alkanol ammonium compound includes triethanol ammonium cation having tne formula
Claim 24
Dependent Claim
51 words
Tne process of Claim 12 wherein said dye consists essentially of Food black 2 and said cationic compound includes trietnanol ammonium cation, saia cationic compound present in an amount such that less than 4 sodium ions associated with sulfonate groups on said dye molecule are displaced by said triethanol ammonium cations.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.