Patent US4366139A successfully refreshed from Google Patents.
US4366139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of water containing carbon black preparations
Assignee: Evonik Operations GmbH
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Filing: 1980-02-28
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Granted: 1982-12-28
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Expires: 2000-02-28
Abstract
Abstract Beaded carbon black is disclosed with a water content of 30 to 80% by weight which are used for coloring of paper and concrete. The product has the advantage of dust-free handling and a higher jet black color compared to conventional carbon black powder.
Inventors
- 👤 Gerhard Kuhner
- 👤 Wilhelm Berndt
- 👤 Lothar Rothbuhr
- 👤 Hans Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:45
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/28; C; C04; C04B; C04B14/00; C04B14/02; C04B14/022; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/58; C09D; C09D17/00; C09D17/004; C09D17/005; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/64; C01P2006/00; C01P2006/12; C01P2006/19
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
A process for the production of water containing carbon black preparations comprising producing furnace blacks, lamp blacks or gas blacks in a continuous production process, separating said blacks from exhaust gases, continuously feeding the blacks to a pin shaft granulator used for the production of carbon black granules wherein the water is adjusted such that the preparations contain between 30 and 80% of water, thereby obtaining well dispersable preparations in the form of a non-dusting powder, beads, or liquid, and then packaging said preparations.
Claim 2
Dependent Claim
84 words
A process for the production of water containing carbon black preparations comprising producing furnace blacks, lamp blacks or gas blacks in a continuous production process, separating said blacks from exhaust gases, continuously feeding the blacks to a pin shaft granulator used for the production of carbon black granules wherein the water is adjusted such that the preparations contain between 30 and 80% of water, thereby obtaining well dispersable preparations in the form of a non-dusting powder, beads, or liquid, and then packaging said preparations.
Claim 3
Dependent Claim
28 words
The process for the production of aqueous carbon black preparations as in claim 1, wherein a wetting and/or dispersing agent is also introduced into the apparatus during production.
Claim 4
Dependent Claim
17 words
The process as in claim 1 or 2, wherein lignin sulfonic acids are used as dispersing agents.
Claim 5
Dependent Claim
41 words
The process as in claim 1, in which the carbon black used has the following characteristics: ______________________________________
Nitrogen surface area
m.sup.2 /g
25-130
Electron microscopic
nm 18-55
particle size
DBP-number ml/100g 45-100
Color strength, related
% 60-120
to IRB 3
______________________________________
Claim 6
Dependent Claim
18 words
The process as in claim 4, wherein the carbon black used has a DBP-number of 90-140 ml/100 g.
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) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |