US4508570A
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Aqueous ink for ink-jet printing
Assignee: Ricoh Co Ltd
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Filing: 1982-10-18
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Granted: 1985-04-02
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Expires: 2002-10-18
Abstract
Abstract An aqueous ink for ink-jet printing comprises as its main components (i) a water-soluble direct dye and/or acid dye, (ii) a polyhydric alcohol and/or an alkyl ether thereof, (iii) water, and (iv) at least one water-soluble non-ionic surface active agent selected from the group consisting of a polyoxyethylene alkyl amine of formula (I), a polyoxyethylene alkyl phenyl ether of formula (II) and a polyoxyethylene alkyl ether of formula (III): <IMAGE> (I) where R1 represents a group derived from a chain hydrocarbon with 16 to 19 carbon atoms; m, an integer of 0 through 18; and n, an integer of 0 through 18; where m+n equals 8 through 18; <IMAGE> (II) where R2 represents a group derived from a chain hydrocarbon with 7 to 12 carbon atoms; and x represents an integer of 12 through 20; <IMAGE> (III) where R3 and R4 each represent a group derived from a chain hydrocarbon with 6 to 8 carbon atoms; and y represents an integer of 10 through 15.
Inventors
- 👤 Tadashi Fujii
- 👤 Tomoyuki Yamaguchi
- 👤 Kakuji Murakami
- 👤 Tomiko Kawakami
- 👤 Hiroko Uenozono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:42
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/50; C09D11/30; C09D11/38
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
163 words
An aqueous ink for ink-jet printing comprising (i) a water-soluble dye, (ii) a wetting agent selected from the group consisting of a polyhydric alcohol, an alkyl ether of a polyhydric alcohol, and mixtures thereof, (iii) water, and (iv) at least one water-soluble non-ionic surface active agent selected from the group consisting of: compounds of the formula (I): ##STR20## wherein R 1 is a chain hydrocarbon group having 16 to 19 carbon atoms, m is an integer of from 0 to 18, and n is an integer of from 0 to 18, wherein m+n equals 8 to 18; compounds of the formula (II): ##STR21## wherein R 2 is an alkyl group having 7 to 12 carbon atoms, and x is an integer of from 12 to 20; and compounds of the formula (III): ##STR22## wherein R 3 and R 4 each is an alkyl group having 6 to 8 carbon atoms, and y is an integer of from 10 to 15, and mixtures thereof.
Claim 2
Dependent Claim
163 words
An aqueous ink for ink-jet printing comprising (i) a water-soluble dye, (ii) a wetting agent selected from the group consisting of a polyhydric alcohol, an alkyl ether of a polyhydric alcohol, and mixtures thereof, (iii) water, and (iv) at least one water-soluble non-ionic surface active agent selected from the group consisting of: compounds of the formula (I): ##STR20## wherein R 1 is a chain hydrocarbon group having 16 to 19 carbon atoms, m is an integer of from 0 to 18, and n is an integer of from 0 to 18, wherein m+n equals 8 to 18; compounds of the formula (II): ##STR21## wherein R 2 is an alkyl group having 7 to 12 carbon atoms, and x is an integer of from 12 to 20; and compounds of the formula (III): ##STR22## wherein R 3 and R 4 each is an alkyl group having 6 to 8 carbon atoms, and y is an integer of from 10 to 15, and mixtures thereof.
Claim 3
Dependent Claim
42 words
An aqueous ink for ink-jet printing as claimed in claim 1, wherein said water-soluble non-ionic surface active agent is a compound of said formula (I), and said group represented by R 1 in said formula (I) is an unsaturated chain hydrocarbyl group.
Claim 4
Dependent Claim
36 words
An aqueous ink for ink-jet printing as claimed in claim 2, wherein the amount of said compound of formula (I) in said aqueous ink is in the range of 0.01 weight percent to 2.00 weight percent.
Claim 5
Dependent Claim
52 words
An aqueous ink for ink-jet printing as claimed in claim 1, wherein said non-ionic surface active agent is selected from said compounds (II) and said compounds (III), and the amount of said non-ionic surface active agent in said aqueous ink is in the range of 0.01 weight percent to 1.00 weight percent.
Claim 6
Dependent Claim
28 words
An aqueous ink for ink-jet printing as claimed in claim 1, wherein said wetting agent is selected from the group consisting of glycerin, diethylene glycol, and mixtures thereof.
Claim 7
Dependent Claim
26 words
An aqueous ink for ink-jet printing as claimed in claim 1, wherein the pH of said aqueous ink is in the range of 9.0 to 11.0.
Claim 8
Dependent Claim
24 words
An aqueous ink for ink-jet printing according to claim 2, wherein R 1 is selected from the group consisting of oleyl, linoleyl and linolenyl.
Claim 9
Dependent Claim
28 words
An aqueous ink for ink-jet printing as claimed in claim 5, wherein the mixing ratio of glycerin to diethylene glycol is in the range of (1:1) to (1:5).
Claim 10
Dependent Claim
62 words
An aqueous ink for ink-jet printing as claimed in claim 5, further comprising a polyhydric alcohol other than glycerin, an alkyl ether of a polyhydric alcohol other than diethylene glycol, or a mixture thereof, the amount of said polyhydric alcohol, said alkyl ether or mixture thereof being not more than 40 weight percent of the total weight of glycerin and diethylene glycol.
Claim 11
Dependent Claim
19 words
An aqueous ink for ink-jet printing as claimed in claim 1, wherein said water-soluble dye is a direct dye.
Claim 12
Dependent Claim
96 words
An aqueous ink for ink-jet printing as claimed in claim 1, wherein said water-soluble dye is an acid dye of the formula: ##STR23## wherein Q 1 and Q 2 each are an unsubstituted benzene or naphthalene ring, or a benzene or naphthalene ring substituted by an amino, hydroxyl or sulfo group; R 1 , R 2 , R 3 and R 4 each represent hydrogen or a sulfo group, said sulfo groups being in the form of sodium salts, potassium salts, or quaternary ammonium salts, each molecule of said dye containing 2 to 6 sulfo groups.
Claim 13
Dependent Claim
122 words
An aqueous ink for ink-jet printing as claimed in claim 1, wherein said water-soluble dye is an acid dye of the formula: ##STR24## wherein Q 3 and Q 6 each represent an unsubstituted or substituted phenyl group, or an unsubstituted or substituted naphthyl group; Q 4 and Q 5 each represent an unsubstituted or substituted 1,4-phenylene group or naphthylene group; R 5 and R 6 each represent hydrogen, a hydroxyl group or amino group; R 7 and R 8 each represent hydrogen or a sulfo group, said sulfo groups being in the form of sodium salts, potassium salts or quaternary ammonium salts, each molecule containing 2 to 6 sulfo groups, x is --NH--, --N═N--, or --CH═CH--, and n is 0 or 1.
Claim 14
Dependent Claim
105 words
An aqueous ink for ink-jet printing as claimed in claim 1, wherein said water-soluble dye is an acid dye of the formula: ##STR25## wherein Q 7 and Q 9 each represent an unsubstituted or substituted phenyl or naphthyl group; Q 8 represents an unsubstituted or substituted 1,4-phenylene, 1,4-naphthylene or 4,4'-biphenylene group; R 9 and R 10 each represent hydrogen, a hydroxyl group or an amino group; R 11 and R 12 each represent hydrogen or a sulfo group, said sulfo groups being in the form of sodium salts, potassium salts or quaternary ammonium salts, each molecule of said dye containing 2 to 6 sulfo groups.
Claim 15
Dependent Claim
105 words
An aqueous ink for ink-jet printing as claimed in claim 1, wherein said water-soluble dye is an acid dye of the formula: ##STR26## wherein Q 10 and Q 12 each represent an unsubstituted or substituted phenyl or naphthyl group; Q 11 represents an unsubstituted or substituted 1,4-phenylene, 1,4-naphthylene or 4,4'-biphenylene group; R 13 and R 14 each represent hydrogen, a hydroxyl group or an amino group; R 15 and R 16 each represent hydrogen or a sulfo group, said sulfo groups being in the form of sodium salts, potassium salts, or quaternary ammonium salts, each molecule of said dye containing 2 to 6 sulfo groups.
Claim 16
Dependent Claim
62 words
An aqueous ink for ink-jet printing as claimed in claim 1, further comprising at least one agent selected from the group consisting of a pH adjustment agent, a specific electric conductivity adjustment agent, a chelating agent, a rust preventing agent, a water-soluble preservative and anti-mold agent, a water-soluble ultraviolet ray-absorbing agent, a water-soluble infrared ray-absorbing agent, a magnetic fluid, and mixtures thereof.
Claim 17
Dependent Claim
147 words
An aqueous ink adapted for ink-jet printing consisting essentially of: an effective amount of at least one water-soluble dye selected from the group consisting of acids dyes and direct dyes; an effective amount of a wetting agent selected from the group consisting of polyhydric alcohols, alkyl ethers of polyhydric alcohols, and mixtures thereof; 0.01 to 2.00 wt.% of a non-ionic surface active agent selected from the group consisting of compounds of the formula ##STR27## wherein R 1 is oleyl, linoleyl, or linolenyl, m is an integer of from 0 to 18 and n is an integer of from 0 to 18, with the proviso that the sum of n+m is in the range of 8 to 18, and the balance is essentially water, said ink having a pH in the range of 9.0 to 11.0 and a surface tension of at least 40 dynes/cm at 25° C.
Claim 18
Dependent Claim
147 words
An aqueous ink adapted for ink-jet printing consisting essentially of: an effective amount of at least one water-soluble dye selected from the group consisting of acids dyes and direct dyes; an effective amount of a wetting agent selected from the group consisting of polyhydric alcohols, alkyl ethers of polyhydric alcohols, and mixtures thereof; 0.01 to 2.00 wt.% of a non-ionic surface active agent selected from the group consisting of compounds of the formula ##STR27## wherein R 1 is oleyl, linoleyl, or linolenyl, m is an integer of from 0 to 18 and n is an integer of from 0 to 18, with the proviso that the sum of n+m is in the range of 8 to 18, and the balance is essentially water, said ink having a pH in the range of 9.0 to 11.0 and a surface tension of at least 40 dynes/cm at 25° C.
Claim 19
Dependent Claim
59 words
An aqueous ink adapted for ink-jet printing, consisting essentially of: an effective amount of at least one water-soluble dye selected from the group consisting of acids dyes and direct dyes; an effective amount of a wetting agent which is a mixture of glycerin and diethylene glycol in which the weight ratio of glycerin:diethylene glycol is from 1:1 to 1:5;
Claim 20
Dependent Claim
59 words
An aqueous ink adapted for ink-jet printing, consisting essentially of: an effective amount of at least one water-soluble dye selected from the group consisting of acids dyes and direct dyes; an effective amount of a wetting agent which is a mixture of glycerin and diethylene glycol in which the weight ratio of glycerin:diethylene glycol is from 1:1 to 1:5;
Claim 21
Dependent Claim
112 words
01 to 1.00 wt.% of a non-ionic surface active agent selected from the group consisting of (a) compounds of the formula: ##STR28## wherein R 2 is an alkyl group of 7 to 12 carbon atoms, and x is an integer of from 12 to 20, (b) compounds of the formula: ##STR29## wherein R 3 and R 4 each represent an alkyl group having 6 to 8 carbon atoms, and y is an integer of from 10 to 15, and (c) mixtures thereof; and the balance is essentially water, said ink having a pH in the range of 9.0 to 11.0 and a surface tension of at least 40 dynes/cm at 25° C.
Claim 22
Dependent Claim
112 words
01 to 1.00 wt.% of a non-ionic surface active agent selected from the group consisting of (a) compounds of the formula: ##STR28## wherein R 2 is an alkyl group of 7 to 12 carbon atoms, and x is an integer of from 12 to 20, (b) compounds of the formula: ##STR29## wherein R 3 and R 4 each represent an alkyl group having 6 to 8 carbon atoms, and y is an integer of from 10 to 15, and (c) mixtures thereof; and the balance is essentially water, said ink having a pH in the range of 9.0 to 11.0 and a surface tension of at least 40 dynes/cm at 25° C.
Claim 23
Dependent Claim
51 words
An aqueous ink as claimed in claim 16, wherein said ink consists of said dye, said wetting agent, said non-ionic surface active agent, an effective amount of at least one member selected from a preservative and anti-mold agent, a chelating agent, and a rust preventing agent, and the balance is water.
Claim 24
Dependent Claim
51 words
An aqueous ink as claimed in claim 17, wherein said ink consists of said dye, said wetting agent, said non-ionic surface active agent, an effective amount of at least one member selected from a preservative and anti-mold agent, a chelating agent, and a rust preventing agent, and the balance is water.
Claim 25
Dependent Claim
59 words
An aqueous ink as claimed in claim 17, wherein said wetting agent contains up to 40 wt.%, based on the total weight of glycerin and diethylene glycol, of a polyhydric alcohol, an alkyl ether of a polyhydric alcohol, or a mixture thereof, said polyhydric alcohol and alkyl ether of a polyhydric alcohol being different from glycerin and diethylene glycol.
Claim 26
Dependent Claim
31 words
An aqueous ink as claimed in claim 20, wherein R 2 is an alkyl group of 8 to 10 carbon atoms, and n is an integer of from 13 to 19.
Claim 27
Dependent Claim
61 words
An aqueous ink as claimed in claim 1, wherein said wetting agent is selected from the group consisting of ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, glycerin, polyethylene glycol, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, and mixtures thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-01 | 1988-10-01 | 1989-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-01 | 1992-10-01 | 1993-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-01 | 1996-10-01 | 1997-04-02 | $7700.00 | Window Closed / Lapsed |