Patent US6606631B1 successfully refreshed from Google Patents.
US3963510A
Expired / Lapsed
US
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Process for the production of toned carbon black
Assignee: Evonik Operations GmbH
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Filing: 1974-11-01
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Granted: 1976-06-15
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Expires: 1994-11-01
Abstract
Abstract Carbon black toned with lake forming organic dyes are produced by dispersing the carbon black in an aqueous solution of the dye and the laking agent, for example aluminum sulfate, the dispersion subsequently mixed with stirring with the lake forming agent sodium water glass, the laking being then completed by adding sodium molybdate and the toned carbon black dried after separation of the liquid phase.
Inventors
- 👤 Gunter Osswald
- 👤 Josef Reus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:05
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
62 words
A process for the production of carbon black toned with a lake forming organic dye comprising dispersing the carbon black in an aqueous solution of the dye and the laking agent, mixing the dispersion obtained with stirring with sodium waterglass, completing the laking by adding sodium molybdate, separating the toned carbon black from the liquid phase and drying the toned carbon black.
Claim 2
Dependent Claim
62 words
A process for the production of carbon black toned with a lake forming organic dye comprising dispersing the carbon black in an aqueous solution of the dye and the laking agent, mixing the dispersion obtained with stirring with sodium waterglass, completing the laking by adding sodium molybdate, separating the toned carbon black from the liquid phase and drying the toned carbon black.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein the laking agent is a water soluble salt of a heavy metal.
Claim 4
Dependent Claim
12 words
The process of claim 2 wherein the salt is an aluminum salt.
Claim 5
Dependent Claim
11 words
The process of claim 3 wherein the salt is aluminum sulfate.
Claim 6
Dependent Claim
15 words
The process of claim 4 wherein the process is carried out at 65° to 85°C.
Claim 7
Dependent Claim
18 words
The process of claim 1 wherein the process is carried out at a temperature of at least 50°C.
Claim 8
Dependent Claim
12 words
The process of claim 1 wherein the organic dye is triphenylmethane dye.
Claim 9
Dependent Claim
13 words
The process according to claim 7 wherein the dye is a blue dye.
Claim 10
Dependent Claim
16 words
The process of claim 8 wherein the dye is methyl violet, crystal violet or Victoria blue.
Claim 11
Dependent Claim
15 words
The process of claim 9 wherein the laking agent is a water soluble aluminum salt.
Claim 12
Dependent Claim
25 words
The process of claim 10 wherein the aluminum salt is aluminum sulfate and the process is carried out at a temperature of 50° to 85°C.
Claim 13
Dependent Claim
25 words
The process of claim 1 wherein there are present 1 to 20 parts by weight of dye per 100 parts by weight of carbon black.
Claim 14
Dependent Claim
24 words
The process of claim 12 wherein there are employed 20 parts by weight of aluminum sulfate per 100 parts by weight of carbon black.
Claim 15
Dependent Claim
33 words
The process of claim 13 wherein there are employed 2 parts by weight of sodium molybdate and 80 parts by weight of 35% sodium waterglass per 100 parts by weight of carbon black.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |