US3992218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Black coloring agent
Assignee: Mitsubishi Chemical Corp
•
Filing: 1975-05-02
•
Granted: 1976-11-16
•
Expires: 1995-05-02
Abstract
Abstract A carbon black coloring agent is obtained by (1) mixing a hydrophobic vehicle with an aqueous slurry containing a carbon black obtained by treating a furnace black having an electromicroscopic average particle size of from about 5 to about 35 m mu with a modifier selected from the group consisting of ozone, nitric acid, hydrogen peroxide, chromic acid and permanganate, and (2) removing the water.
Inventors
- 👤 Kensuke Suetsugu
- 👤 Eiji Maruyama
- 👤 Katsuyuki Same
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:18
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/565; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/12; C01P2006/19
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
63 words
A carbon black coloring agent obtained by (1) mixing a hydrophobic vehicle with an aqueous slurry contaning a carbon black obtained by treating a furnace black having a electromicroscopic average particle size of from about 5 to about 35 mμ with a modifier selected from the group consisting of ozone, nitric acid, hydrogen peroxide, chromic acid and permanganate, and (2) removing the water.
Claim 2
Dependent Claim
63 words
A carbon black coloring agent obtained by (1) mixing a hydrophobic vehicle with an aqueous slurry contaning a carbon black obtained by treating a furnace black having a electromicroscopic average particle size of from about 5 to about 35 mμ with a modifier selected from the group consisting of ozone, nitric acid, hydrogen peroxide, chromic acid and permanganate, and (2) removing the water.
Claim 3
Dependent Claim
25 words
The carbon black agent of claim 1, wherein the furnace black has an electromicroscopic average particle size of from about 5 to about 20 mμ.
Claim 4
Dependent Claim
48 words
The carbon black coloring agent of claim 2, wherein the furnace black is further characterized by having a specific surface area determined by the BET method of from about 180 to about 1200 m 2 /g and an oil absorption of about 35 to about 100 ml/100 g.
Claim 5
Dependent Claim
42 words
The carbon black coloring agent of claim 3, wherein the furnace black is treated with ozone until the total acidity of the carbon black surface becomes 1.5 - 6.0 microequivalents per sq. meter of the specific surface area of the carbon black.
Claim 6
Dependent Claim
45 words
The carbon black coloring agent of claim 3, wherein the carbon black is treated with hydrogen peroxide in an amount of from 2.0 × 10 - 6 to 40 × 10 - 6 mole per unit of the specific surface area of the carbon black.
Claim 7
Dependent Claim
45 words
The carbon black coloring agent of claim 3, wherein the furnace black is treated with nitric acid in an amount of from 1.0 × 10 - 6 to 100 × 10 - 6 mole per unit of the specific surface area of the carbon black.
Claim 8
Dependent Claim
25 words
The carbon black coloring agent of claim 5, wherein the treatment with H 2 O 2 is carried out in situ in the aqueous slurry.
Claim 9
Dependent Claim
23 words
The carbon black coloring agent of claim 6, wherein the treatment with nitric acid is carried out in situ in the aqueous slurry.
Claim 10
Dependent Claim
46 words
The carbon black coloring agent of claim 1, wherein said aqueous slurry containing an oxidized carbon black is obtained by admixing a carbon black with an aqueous solution of the modifier selected from the group consisting of ozone, nitric acid, hydrogen peroxide, chromic acid and permanganate.
Claim 11
Dependent Claim
42 words
The carbon black coloring agent of claim 1, wherein said carbon black is oxidized with ozone or nitric acid, and then the resulting oxidized carbon black is admixed with an aqueous medium to form said aqueous slurry containing an oxidized carbon black.
Claim 12
Dependent Claim
74 words
The carbon black coloring agent of claim 1, wherein said furnace black having an elecromicroscopic average particle size of about 5 to 20 mμ, a specific BET surface area of about 180 to 1200 m 2 /g and an oil absorption characteristic of about 35 to 100 ml/100g is oxidized with ozone, and then the oxidized furnace black is admixed with an aqueous medium to form said aqueous slurry containing an oxidized carbon black.
References Cited (Backward Citations)
US3301694A
Cited
US3565657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-16 | 1980-05-17 | 1980-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-16 | 1984-05-17 | 1984-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-16 | 1988-05-17 | 1988-11-16 | $7700.00 | Window Closed / Lapsed |