US4647310A
Expired / Lapsed
US
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Aqueous ink composition for ink jet-recording
Assignee: Ricoh Co Ltd
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Filing: 1986-02-24
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Granted: 1987-03-03
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Expires: 2006-02-24
Abstract
Abstract An aqueous ink composition for ink-jet recording comprising an aqueous solution of a water-soluble dye of formula (I) and a humectant dissolved in water: ##STR1## wherein Ar represents an unsubstituted or substituted phenyl group, or an unsubstituted or substituted naphthyl group; X represents a hydroxyl group, an alkoxy group, a halogen atom, an alkylamino group, a hydroxyalkylamino group, a cyclic amino group or an anilino group; M represents hydrogen, K, Na, Li, NH 4 or an organic amine cation; and n is an integer of 1 or 2.
Inventors
- 👤 Masaru Shimada
- 👤 Toshiyuki Kawanishi
- 👤 Kakuji Murakami
- 👤 Tamotsu Aruga
- 👤 Hiroyuki Uemura
- 👤 Kiyofumi Nagai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:43
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/328; C09B; C09B43/00; C09B43/12; C09B43/136; C09B43/16; C09B62/00; C09B62/02; C09B62/04; C09B62/08; C09B62/09
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
86 words
An aqueous ink composition for ink-jet recording comprising an aqueous solution of a water-soluble dye of formula (I) and a humectant dissolved in water: ##STR28## wherein Ar represents an unsubstituted or substituted phenyl group, or an unsubstituted or substituted naphthyl group; X represents a hydroxyl group, an alkoxy group, halogen, an alkylamino group, a hydroxyalkylamino group, a cyclic amino group or an anilino group; M represents hydogen, K, Na, Li, NH 4 or an organic amine cation; and n is an integer of 1 or 2.
Claim 2
Dependent Claim
86 words
An aqueous ink composition for ink-jet recording comprising an aqueous solution of a water-soluble dye of formula (I) and a humectant dissolved in water: ##STR28## wherein Ar represents an unsubstituted or substituted phenyl group, or an unsubstituted or substituted naphthyl group; X represents a hydroxyl group, an alkoxy group, halogen, an alkylamino group, a hydroxyalkylamino group, a cyclic amino group or an anilino group; M represents hydogen, K, Na, Li, NH 4 or an organic amine cation; and n is an integer of 1 or 2.
Claim 3
Dependent Claim
41 words
An aqueous ink composition for ink-jet recording as claimed in claim 1, wherein the amount of said dye is in the range of 0.5 to 20 parts by weight with respect to 100 parts by weight of said aqueous ink composition.
Claim 4
Dependent Claim
60 words
An aqueous ink composition for ink-jet recording as claimed in claim 1, wherein said humectant is at least one compound selected from the group consisting of polyhydric alcohols and ethers thereof, and the amount of said humectant is in the range of 5 to 80 parts by weight with respect to 100 parts by weight of said aqueous ink composition.
Claim 5
Dependent Claim
66 words
An aqueous ink composition for ink-jet recording as claimed in claim 1, wherein said humectant is at least one compound selected from the group consisting of triethanol amine, dimethylformamide, N-methyl-2-pyrrolidone, 2-pyrrolidone and 1,3-dimethyl imidazolidinone, dimethylformamide and triethanolamine and the amount of said humectant is in the range of 5 to 80 parts by weight with respect to 100 parts by weight of said aqueous ink composition.
Claim 6
Dependent Claim
20 words
An aqueous ink composition for ink-jet recording as claimed in claim 1, further comprising a water-soluble preservative and anti-mold agent.
Claim 7
Dependent Claim
35 words
An aqueous ink composition for ink-jet recording as claimed in claim 3, wherein said polyhydric alcohol is selected from the group consisting of ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, polypropylene glycol and glycerin.
Claim 8
Dependent Claim
54 words
An aqueous ink composition for ink-jet recording as claimed in claim 3, wherein said ether of polyhydric alcohol is selected from the group consisting of ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether and triethylene glycol monoethyl ether.
Claim 9
Dependent Claim
37 words
An aqueous ink composition for ink-jet recording as claimed in claim 5, wherein said water-soluble preservative and anti-mold agent is selected from the group consisting of sodium dehydroacetate, sodium benzoate, 2-pyridine thiol-1-oxide sodium salt and sodium pentachlorophenol.
Claim 10
Dependent Claim
36 words
An aqueous ink composition for ink-jet recording as claimed in claim 1, wherein said water-soluble dye is selected from the group consisting of: ##STR29## wherein R 1 and R 2 each, and X respectively respresent: ##STR30##
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |