US5542969A
Expired / Lapsed
US
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Recording liquid
Assignee: Mitsubishi Chemical Corp
•
Filing: 1995-09-26
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Granted: 1996-08-06
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Expires: 2015-09-26
Abstract
Abstract A recording liquid containing carbon black dispersed in an aqueous medium, wherein the volume ratio of carbon black having a particle size of at least 0.2 μm to the total carbon black is at least 50% by volume, and the volume ratio of carbon black having a particle size of at least 0.6 μm to the total carbon black is at most 20% by volume.
Inventors
- 👤 Takashi Hirasa
- 👤 Hiroshi Takimoto
- 👤 Nobutake Mise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:05
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/32; C09D11/324; C09D11/16; C09D11/17
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
65 words
A recording liquid containing carbon black dispersed in an aqueous medium, wherein the volume ratio of carbon black having a particle size of at least 0.2 μm to the total carbon black is at least 50% by volume, and the volume ratio of carbon black having a particle size of at least 0.6 μm to the total carbon black is at most 20% by volume.
Claim 2
Dependent Claim
65 words
A recording liquid containing carbon black dispersed in an aqueous medium, wherein the volume ratio of carbon black having a particle size of at least 0.2 μm to the total carbon black is at least 50% by volume, and the volume ratio of carbon black having a particle size of at least 0.6 μm to the total carbon black is at most 20% by volume.
Claim 3
Dependent Claim
35 words
The recording liquid according to claim 1, wherein the volume ratio of carbon black having a particle size of at least 0.2 μm to the total carbon black is from 50 to 80% by volume.
Claim 4
Dependent Claim
35 words
The recording liquid according to claim 1, wherein the volume ratio of carbon black having a particle size of at least 0.6 μm to the total carbon black is from 5 to 20% by volume.
Claim 5
Dependent Claim
21 words
The recording liquid according to claim 1, wherein the carbon black has an average particle size of from 0.15 to 0.45μm.
Claim 6
Dependent Claim
41 words
The recording liquid according to claim 1, wherein the carbon black has a primary particle size of from 10 to 100 nm, a DBP oil absorption of from 40 to 150 ml/100 g, and a pH of from 3 to 9.
Claim 7
Dependent Claim
22 words
The recording liquid according to claim 5, wherein the primary particle size of the carbon black is from 15 to 90 nm.
Claim 8
Dependent Claim
23 words
The recording liquid according to claim 5, wherein the DBP oil absorption of the carbon black is from 50 to 130 ml/100 g.
Claim 9
Dependent Claim
17 words
The recording liquid according to claim 1, wherein a dispersing agent is incorporated to the recording liquid.
Claim 10
Dependent Claim
25 words
The recording liquid according to claim 8, wherein the dispersing agent is selected from the group consisting of anionic surfactants, nonionic surfactants and polymer dispersants.
Claim 11
Dependent Claim
58 words
The recording liquid according to claim 8, wherein the dispersing agent is selected from the group consisting of sulfonates of C 8-20 α-olefins, copolymers of (a) styrene with (b) at least one member selected from the group consisting of maleic acid and its esters, acrylic acid and its esters, and methacrylic acid and its esters, and their salts.
Claim 12
Dependent Claim
20 words
The recording liquid according to claim 1, wherein the aqueous medium is composed of water and a water-soluble organic solvent.
Claim 13
Dependent Claim
58 words
The recording liquid according to claim 11, wherein the water-soluble organic solvent is selected from the group consisting of ethylene glycol, propylene glycol, butylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol (molecular weight: from about 190 to about 400), glycerol, alkyl ethers of such glycols and glycerol, N-methylpyrrolidone, 1,3-dimethylimidazolidinone, thiodiglycol, 2-pyrrolidone, sulforane, dimethylsulfoxide, diethanolamine, triethanolamine, ethanol and isopropanol.
Claim 14
Dependent Claim
29 words
The recording liquid according to claim 1, wherein the amount of the carbon black to the total weight of the recording liquid is from 1 to 10% by weight.
Claim 15
Dependent Claim
28 words
The recording liquid according to claim 1, wherein the amount the carbon black to the total weight of the recording liquid is from 3 to 8% by weight.
Claim 16
Dependent Claim
28 words
The recording liquid according to claim 8, wherein the amount of the dispersing agent to the amount of the carbon black is from 5 to 100% by weight.
Claim 17
Dependent Claim
28 words
The recording liquid according to claim 8, wherein the amount of the dispersing agent to the amount of the carbon black is from 5 to 30% by weight.
Claim 18
Dependent Claim
30 words
The recording liquid according to claim 11, wherein the amount of the water-soluble organic solvent to the total weight of the recording liquid is from 5 to 30% by weight.
Claim 19
Dependent Claim
30 words
The recording liquid according to claim 11, wherein the amount of the water-soluble organic solvent to the total weight of the recording liquid is from 10 to 20% by weight.
Claim 20
Dependent Claim
22 words
The recording liquid according to claim 1, which further contains a water-soluble resin, a fungicide, a bactericide, a pH-controlling agent or urea.
Claim 21
Dependent Claim
61 words
The recording liquid according to claim 1, wherein the recording liquid is prepared by grinding and dispersing carbon black in water in the presence or absence of a water-soluble organic solvent by to make an aqueous dispersion means of a ball mill, a roll mill or a sand grind mill, and then diluting the aqueous dispersion to form said recording liquid.
Claim 22
Dependent Claim
22 words
The recording liquid according to claim 20, wherein grinding and dispersing treatment were carried out by means of a sand grind mill.
References Cited (Backward Citations)
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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) | 1999-08-06 | 2000-02-05 | 2000-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-06 | 2004-02-05 | 2004-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-06 | 2008-02-05 | 2008-08-06 | $7700.00 | Window Closed / Lapsed |