US5944883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrafine particle organic pigment color ink and method for producing the same
Assignee: Maxell Ltd
•
Filing: 1997-01-08
•
Granted: 1999-08-31
•
Expires: 2017-01-08
Abstract
Abstract Disclosed is an ultrafine particle organic pigment color ink which comprises an ultrafine particle organic pigment having a chromatic color, an amphi-philic compound of which the hydrophilic portion is polyethylene oxide and the hydrophobic portion is an alkyl group and/or an aromatic ring and an aqueous solvent. A method for producing the ink is also disclosed. The ink is excellent in storage stability, causes no clogging of head and, furthermore, is excellent in quality of the resulting print and light resistance.
Inventors
- 👤 Shoji Saibara
- 👤 Shigeo Aoyama
- 👤 Yuichi Sakurai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:22
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
86 words
An ultrafine particle organic pigment color ink which comprises an ultrafine particle organic pigment having a chromatic color, an amphiphilic compound of which the hydrophilic portion is polyethylene oxide and the hydrophobic portion is an alkyl group and/or an aromatic ring, and an aqueous solvent, wherein the molecular weight (x) of the polyethylene oxide which is the hydrophilic portion of the amphiphilic compound and the molecular weight (y) of the hydrophobic portion of the amphiphilic compound have the relation of the following formula (1): 1≦x/y≦20 (1).
Claim 2
Dependent Claim
86 words
An ultrafine particle organic pigment color ink which comprises an ultrafine particle organic pigment having a chromatic color, an amphiphilic compound of which the hydrophilic portion is polyethylene oxide and the hydrophobic portion is an alkyl group and/or an aromatic ring, and an aqueous solvent, wherein the molecular weight (x) of the polyethylene oxide which is the hydrophilic portion of the amphiphilic compound and the molecular weight (y) of the hydrophobic portion of the amphiphilic compound have the relation of the following formula (1): 1≦x/y≦20 (1).
Claim 3
Dependent Claim
34 words
An ultrafine particle organic pigment color ink according to claim 1, wherein molecular weight (x) of the polyethylene oxide which is the hydrophilic portion of the amphiphilic compound is in the range of 300≦x≦3500.
Claim 4
Dependent Claim
29 words
An ultrafine particle organic pigment color ink according to claim 1, wherein molecular weight (y) of the hydrophobic portion of the amphiphilic compound is in the range of 100≦y≦500.
Claim 5
Dependent Claim
35 words
An ultrafine particle organic pigment color ink according to claim 1, wherein the settling distance of the organic pigment when an acceleration of 10000 G is applied to the ink is 10 cm or less.
Claim 6
Dependent Claim
27 words
An ultrafine particle organic pigment color ink according to claim 1, wherein the organic pigment is ultrafine particle having a particle diameter of 100 nm or less.
Claim 7
Dependent Claim
27 words
An ultrafine particle organic pigment color ink according to claim 1, wherein the organic pigment is ultrafine particle having a particle diameter of 50 nm or less.
Claim 8
Dependent Claim
23 words
An ultrafine particle organic pigment color ink according to claim 1 which has a viscosity of 10 cp or lower at 25° C.
Claim 9
Dependent Claim
17 words
An ultrafine particle organic pigment color ink according to claim 1 which additionally contains an anionic dispersant.
Claim 10
Independent Claim
75 words
A method for producing an ultrafine particle organic pigment color ink which comprises subjecting a mixture comprising an ultrafine particle organic pigment having a chromatic color, an amphiphilic compound of which the hydrophilic portion is polyethylene oxide and the hydrophobic portion is an alkyl group and/or an aromatic ring, and an aqueous solvent to grinding and dispersing of said organic pigment having the chromatic color by ceramic beads having a particle diameter of 0.01-1.0 mm.
Claim 11
Independent Claim
75 words
A method for producing an ultrafine particle organic pigment color ink which comprises subjecting a mixture comprising an ultrafine particle organic pigment having a chromatic color, an amphiphilic compound of which the hydrophilic portion is polyethylene oxide and the hydrophobic portion is an alkyl group and/or an aromatic ring, and an aqueous solvent to grinding and dispersing of said organic pigment having the chromatic color by ceramic beads having a particle diameter of 0.01-1.0 mm.
Claim 12
Dependent Claim
24 words
A method for ink jet recording comprising spraying droplets of an ultrafine particle organic pigment of claim 1 from an ink jet printing head.
Claim 13
Dependent Claim
23 words
An ultrafine particle organic pigment color ink according to claim 3, wherein said hydrophobic portion contains an alkyl group and an aromatic group.
Claim 14
Dependent Claim
32 words
An ultrafine particle organic pigment color ink according to claim 1, wherein said amphiphilic compound is present in an amount of 0.1 to 10% by weight based on the total ink composition.
Claim 15
Dependent Claim
26 words
An ultrafine particle organic pigment color ink according to claim 1, wherein said ultrafine particle organic pigment color ink has a surface tension of 20-70 dynes/cm.
Claim 16
Dependent Claim
22 words
An ultrafine particle organic pigment color ink according to claim 1, wherein the viscosity is 5 cp or less at 25° C.
References Cited (Backward Citations)
JPS56147871A
Cited
US4508570A
Cited
US4509982A
Cited
US4853036A
Cited
US5067980A
Cited
US5395434A
Cited
US5529617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-08-30 | 2003-03-01 | 2003-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-30 | 2007-03-01 | 2007-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-30 | 2011-03-01 | 2011-08-31 | $7700.00 | Window Closed / Lapsed |