US5067980A
Expired / Lapsed
US
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Recording process and liquid using water-soluble organic solvent
Assignee: Canon Inc
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Filing: 1990-07-17
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Granted: 1991-11-26
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Expires: 2010-07-17
Abstract
Abstract A recording liquid suitable for use as an ink in an ink jet printing system essentially contains water and a water-soluble organic solvent which dissolves not less than 3 wt. % of a coloring matter which has a water-solubility not greater than 0.1 wt. %. The water-soluble organic solvent has a surface tension not greater than 45 dyne/cm. The recording liquid further contains a surfactant. The recording solution, when used as an ink in an ink jet printing system, can print letters and other information with high degree of stability of the ink jet over a wide range of operating conditions and superior fixing characteristic, as well as high durability of the print against water, even when the printing is conducted on a recording medium having exposed fibers such as an ordinary paper.
Inventors
- 👤 Shoji Koike
- 👤 Yasuko Tomida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:51
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
116 words
An aqueous recording liquid, comprising: a colorant selected from the group consisting of acidic dyestuffs, direct dyestuffs, vat dyestuffs, oil-soluble dye-stuffs, sulfide dyestuffs and dispersion dyestuffs, a water-soluble organic solvent, from 0.5-10 wt. % of a nonionic surfactant selected from the group consisting of polyoxyethylene alkylether, polyoxyethylene alkyl phenylether, polyoxyethylene fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkylamine, glycerine fatty acid ester, and oxyethylene oxypropylene block polymer, and from 20-95 wt. % water, said organic solvent having a surface tension of at most 45 dyne/cm, wherein said colorant is at most 0.1 wt. % soluble in water at 20° C. and at least 3 wt. % soluble in said solvent.
Claim 2
Dependent Claim
116 words
An aqueous recording liquid, comprising: a colorant selected from the group consisting of acidic dyestuffs, direct dyestuffs, vat dyestuffs, oil-soluble dye-stuffs, sulfide dyestuffs and dispersion dyestuffs, a water-soluble organic solvent, from 0.5-10 wt. % of a nonionic surfactant selected from the group consisting of polyoxyethylene alkylether, polyoxyethylene alkyl phenylether, polyoxyethylene fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkylamine, glycerine fatty acid ester, and oxyethylene oxypropylene block polymer, and from 20-95 wt. % water, said organic solvent having a surface tension of at most 45 dyne/cm, wherein said colorant is at most 0.1 wt. % soluble in water at 20° C. and at least 3 wt. % soluble in said solvent.
Claim 3
Dependent Claim
16 words
The recording liquid of claim 1, wherein said colorant is present at from 0.2-20 wt. %.
Claim 4
Dependent Claim
16 words
The recording liquid of claim 2, wherein said solvent is present at from 5-80 wt. %.
Claim 5
Dependent Claim
15 words
The recording liquid of claim 3, wherein water is present at from 30-90 wt. %.
Claim 6
Dependent Claim
16 words
The recording liquid of claim 4, wherein said colorant is present at from 0.5-10 wt. %.
Claim 7
Dependent Claim
16 words
The recording liquid of claim 5, wherein said solvent is present at from 5-60 wt. %.
Claim 8
Dependent Claim
15 words
The recording liquid of claim 6, wherein water is present at from 40-90 wt. %.
Claim 9
Dependent Claim
16 words
The recording liquid of claim 7, wherein said colorant is present at from 1-5 wt. %.
Claim 10
Dependent Claim
16 words
The recording liquid of claim 8, wherein said solvent is present at from 10-50 wt. %.
Claim 11
Dependent Claim
15 words
The recording liquid of claim 9, wherein water is present at from 60-90 wt. %.
Claim 12
Dependent Claim
13 words
The recording liquid of claim 1, wherein said colorant is an oil-soluble dye.
Claim 13
Dependent Claim
27 words
The recording liquid of any of claims 1, 3, 6 or 9, wherein said solvent exhibits a vapor pressure of at most 0.5 mmHg at 25° C.
Claim 14
Dependent Claim
26 words
The recording liquid of claim 12, wherein said solvent is selected from the group consisting of nitrogen-containing ring compounds and mono- or bi-alkylethers of alkylene glycols.
Claim 15
Dependent Claim
27 words
The recording liquid of claim 1, wherein said liquid exhibits a viscosity of from 1-15 cP at 25° C. and a surface tension of from 30-65 dyne/cm.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-25 | 1995-05-27 | 1995-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-25 | 1999-05-27 | 1999-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-25 | 2003-05-27 | 2003-11-26 | $7700.00 | Window Closed / Lapsed |