US6235099B1
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US
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Inkjet recording liquid and process for the production thereof
Assignee: Artience Co Ltd
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Filing: 1997-07-28
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Granted: 2001-05-22
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Expires: 2017-07-28
Abstract
Abstract A water-dispersed inkjet recording liquid excellent in water resistance and transparency and also excellent in the property of ejection from a nozzle, containing, as a colorant, a water-based dispersion of an organic pigment (A) which is at least one member selected from the group consisting of a quinacridone pigment, a benzimidazolone pigment, an insoluble azo pigment, a fuzed azo pigment, a quinophthalone pigment, a naphthol pigment, a perylene pigment and an isoindolinone pigment and has an average particle diameter of 10 to 150 nm (measured by laser scattering), the water-based dispersion of the organic pigment (A) being obtained by mechanically kneading a mixture containing at least three components of the organic pigment (A), a water-soluble inorganic salt (B) in an amount by weight at least three times as large as the amount of the organic pigment (A) and a water-soluble solvent (C) to finely mill the organic pigment (A), and then removing the water-soluble inorganic salt (B) and the water-soluble solvent (C) by washing the kneaded mixture with water, and a process for the production thereof.
Inventors
- 👤 Seiji Aida
- 👤 Tsutomu Fujigamori
- 👤 Hisashi Uraki
- 👤 Ichiro Toyoda
- 👤 Sunao Satake
- 👤 Seiji Sawada
- 👤 Yasuharu Iida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:31
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/322; C09D11/324; C09D11/326
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
152 words
A water-dispersed inkjet recording liquid containing, as a colorant, a water-based dispersion of an organic pigment (A) which is at least one member selected from the group consisting of a quinacridone pigment, a benzimidazolone pigment, an insoluble azo pigment, a fused azo pigment, a quinophthalone pigment, a naphthol pigment, a perylene pigment and an isoindolinone pigment and has an average particle diameter of 10 to 150 nm measured by laser scattering, the water-based dispersion of the organic pigment (A) being obtained by mechanically kneading a mixture of the organic pigment (A), a water-soluble inorganic salt (B) in an amount by weight at least three times as large as the amount of the organic pigment (A) and a water-soluble solvent (C) at 30 to 65° C. to finely mill the organic pigment (A), and then removing the water-soluble inorganic salt (B) and the water-soluble solvent (C) by washing the kneaded mixture with water.
Claim 2
Dependent Claim
152 words
A water-dispersed inkjet recording liquid containing, as a colorant, a water-based dispersion of an organic pigment (A) which is at least one member selected from the group consisting of a quinacridone pigment, a benzimidazolone pigment, an insoluble azo pigment, a fused azo pigment, a quinophthalone pigment, a naphthol pigment, a perylene pigment and an isoindolinone pigment and has an average particle diameter of 10 to 150 nm measured by laser scattering, the water-based dispersion of the organic pigment (A) being obtained by mechanically kneading a mixture of the organic pigment (A), a water-soluble inorganic salt (B) in an amount by weight at least three times as large as the amount of the organic pigment (A) and a water-soluble solvent (C) at 30 to 65° C. to finely mill the organic pigment (A), and then removing the water-soluble inorganic salt (B) and the water-soluble solvent (C) by washing the kneaded mixture with water.
Claim 3
Dependent Claim
209 words
A water-dispersed inkjet recording liquid according to claim 1 , wherein the water-based dispersion of the organic pigment (A) is a product obtained by further adding a pigment derivative (D) of the formula (1), P—[X—Y—Z—N(R 1 )R 2 ] n (1) wherein P is an organic pigment residue, a heterocyclic ring residue or an aromatic polycyclic compound residue, X is a divalent binding group formed of a chemically rational combination of 2 to 15 atoms selected from the group consisting of S, C, N, O and H, Y is a divalent binding group selected from the group consisting of a direct bond, —NR— in which R is H or an alkyl group having 1 to 18 carbon atoms, or —O—, Z is an alkylene group having 1 to 6 carbon atoms, either each of R 1 and R 2 is independently an optionally substituted alkyl group having 1 to 18 carbon atoms or R 1 and R 2 form a heterocyclic ring which may have a substituent, and n is an integer of 1 to 3, to the mixture, kneading the mixture to finely mill the organic pigment (A), and then removing the water-soluble inorganic salt (B) and the water-soluble solvent (C) by washing the kneaded mixture with water.
Claim 4
Dependent Claim
26 words
The water-dispersed inkjet recording liquid according to claim 1 , wherein the water-dispersed inkjet recording liquid further contains a water-based resin in addition to the colorant.
Claim 5
Dependent Claim
21 words
The water-dispersed inkjet recording liquid according to claim 3 , wherein the water-dispersed inkjet recording liquid further contains a neutralizing agent.
Claim 6
Dependent Claim
27 words
The water-dispersed inkjet recording liquid according to claim 3 , wherein the organic pigment (A) is contained in the range of from 0.1 to 10% by weight.
Claim 7
Dependent Claim
31 words
The water-dispersed inkjet recording liquid according to claim 3 , wherein the water-dispersed inkjet recording liquid has a viscosity in the range of from 0.8 to 15 centipoise at 25° C.
Claim 8
Dependent Claim
35 words
The water-dispersed inkjet recording liquid according to claim 3 , wherein the water-based resin is contained in an amount of 0.5 to 10 parts by weight per 100 parts by weight of the recording liquid.
Claim 9
Dependent Claim
155 words
The process for the production of a water-dispersed inkjet recording liquid, which comprises the following steps a)˜d), a) mechanically kneading a mixture of an organic pigment (A), a water-soluble inorganic salt (B) in an amount by weight at least three times as large as the amount of the organic pigment (A) and a water-soluble solvent (C), to finely mill the organic pigment A), b) removingthewater-soluble inorganic salt (B) and the water-soluble solvent (C) from the mixture of the finely milled organic pigment (A) by washing the mixture with water, to obtain a water-based dispersion of the organic pigment (A) having an average particle diameter of 10 to 150 nm measured by laser scattering, c) adding and dispersing a water-based resin to/in the water-based dispersion, and d) adding water and an additive to the dispersion to dilute the dispersion and filtering the diluted dispersion through a filter having an opening diameter of 3 μm or less.
Claim 10
Dependent Claim
155 words
The process for the production of a water-dispersed inkjet recording liquid, which comprises the following steps a)˜d), a) mechanically kneading a mixture of an organic pigment (A), a water-soluble inorganic salt (B) in an amount by weight at least three times as large as the amount of the organic pigment (A) and a water-soluble solvent (C), to finely mill the organic pigment A), b) removingthewater-soluble inorganic salt (B) and the water-soluble solvent (C) from the mixture of the finely milled organic pigment (A) by washing the mixture with water, to obtain a water-based dispersion of the organic pigment (A) having an average particle diameter of 10 to 150 nm measured by laser scattering, c) adding and dispersing a water-based resin to/in the water-based dispersion, and d) adding water and an additive to the dispersion to dilute the dispersion and filtering the diluted dispersion through a filter having an opening diameter of 3 μm or less.
Claim 11
Dependent Claim
186 words
A process for the production of an inkjet recording liquid according to claim 8 , wherein the mixture in the step a) further contains the pigment derivative (D) of the formula (1), P—[X—Y—Z—N(R 1 )R 2 ] n (1) wherein P is an organic pigment residue, a heterocyclic ring residue or an aromatic polycyclic compound residue, X is a divalent binding group formed of a chemically rational combination of 2 to 15 atoms selected from the group consisting of S, C, N, O and H, Y is a divalent binding group selected from the group consisting of a direct bond, —NR— in which R is H or an alkyl group having 1 to 18 carbon atoms, or —O—, Z is an alkylene group having 1 to 6 carbon atoms, either each of R 1 and 2 is independently an optionally substituted alkyl group having 1 to 18 carbon atoms or R 1 and R 2 form a heterocyclic ring which may have a substituent, and n is an integer of 1 to 3, and/or a resin (E) which is a solid and water-insoluble at room temperature.
Claim 12
Dependent Claim
39 words
The process for the production of a water-dispersed inkjet recording liquid according to claim 8 , wherein the water-based resin is dispersed in the water-based dispersion in the step c) by kneading the water-based resin and the water-based dispersion.
Claim 13
Dependent Claim
43 words
The process for the production of a water-dispersed inkjet recording liquid according to claim 8 , wherein, in the step c), the organic pigment has a concentration of 10 to 40% by weight and the organic pigment and the water-based resin are dispersed.
Claim 14
Dependent Claim
64 words
A process for the production of a water-dispersed inkjet recording liquid according to claim 8 , therein the additive in the step d) contains at least one selected from the group consisting of a neutralizing agent for the water-based resin, a dispersing agent, an aqueous solvent for retaining wettability, an antifungal agent, an agent for adjusting penetration, a chelating agent and an antifoaming agent.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2004-05-21 | 2004-11-20 | 2005-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-05-21 | 2008-11-20 | 2009-05-22 | $3760.00 | Window Closed / Lapsed |
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