US4221772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon black for lacquers and pigments
Assignee: Evonik Operations GmbH
•
Filing: 1978-01-04
•
Granted: 1980-09-09
•
Expires: 1998-01-04
Abstract
Abstract There is prepared carbon black having the following properties: Primary particle size nm 35-120 BET surface area m2/g 10-50 Iodine adsorption mg/g 10-55 Volatile/content % 2-8 pH value 3-6 Acidity ml n/10 acid 2-16 per 100 grams of carbon black DBP number ml/100 grams 40-140 The carbon black is useful in producing gray lacquers, multi-colored lacquers and in making low viscosity and storage stable preliminary pastes suitable for use in lacquers.
Inventors
- 👤 Edith Eisenmenger
- 👤 Gerhard Kuhner
- 👤 Lothar Rothbuhr
- 👤 Hans Schafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:16
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/565; C09C1/50; 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
105 words
A carbon black outstandingly suited as a black resisting flushing out in pigmented lacquers and for the production of low viscosity and storage stable pigmented pastes prepared by a process comprising oxidizing with nitrogen dioxide a furnace black having the following properties ______________________________________
Primary particle size
nm 35-120
BET surface area m.sup.2 /g 10-50
Iodine adsorption mg/g 10-55
______________________________________ said carbon black having the following properties: ______________________________________
Primary particle size
nm 35-120
BET surface area m.sup.2 /g 10-50
Iodine adsorption
mg/g 10-55
Volatile/content % 2-8
pH value 3-6
Acidity ml n/10 acid
2-16
per 100 grams
of carbon black
DBP number ml/100 grams
40-140
______________________________________
Claim 2
Dependent Claim
105 words
A carbon black outstandingly suited as a black resisting flushing out in pigmented lacquers and for the production of low viscosity and storage stable pigmented pastes prepared by a process comprising oxidizing with nitrogen dioxide a furnace black having the following properties ______________________________________
Primary particle size
nm 35-120
BET surface area m.sup.2 /g 10-50
Iodine adsorption mg/g 10-55
______________________________________ said carbon black having the following properties: ______________________________________
Primary particle size
nm 35-120
BET surface area m.sup.2 /g 10-50
Iodine adsorption
mg/g 10-55
Volatile/content % 2-8
pH value 3-6
Acidity ml n/10 acid
2-16
per 100 grams
of carbon black
DBP number ml/100 grams
40-140
______________________________________
Claim 3
Dependent Claim
27 words
A carbon black according to claim 1 wherein the oxidation is carried out with a mixture of nitrogen dioxide and air at a temperature of 80°-200° C.
Claim 4
Dependent Claim
97 words
A process of producing the carbon black having the following properties: ______________________________________
Primary particle size
mm 35-120
BET surface area m.sup.2 /g 10-50
Iodine adsorption
mg/g 10-55
Volatile/content % 2-8
pH value 3-6
Acidity ml/10 acid 2-16
per 100 grams of
carbon black
DBP number ml/100 grams 40-140"
______________________________________ comprising oxidizing with nitrogen dioxide a furnace black having the following properties: ______________________________________
Primary particle size
nm 35-120
BET surface area m.sup.2 /g
10- 50
Iodine adsorption mg/g 10- 55
______________________________________ ______________________________________
Primary particle size
nm 35-120
BET surface area m.sup.2 /g 10-50
Iodine adsorption mg/g 10-55
______________________________________
Claim 5
Dependent Claim
97 words
A process of producing the carbon black having the following properties: ______________________________________
Primary particle size
mm 35-120
BET surface area m.sup.2 /g 10-50
Iodine adsorption
mg/g 10-55
Volatile/content % 2-8
pH value 3-6
Acidity ml/10 acid 2-16
per 100 grams of
carbon black
DBP number ml/100 grams 40-140"
______________________________________ comprising oxidizing with nitrogen dioxide a furnace black having the following properties: ______________________________________
Primary particle size
nm 35-120
BET surface area m.sup.2 /g
10- 50
Iodine adsorption mg/g 10- 55
______________________________________ ______________________________________
Primary particle size
nm 35-120
BET surface area m.sup.2 /g 10-50
Iodine adsorption mg/g 10-55
______________________________________
Claim 6
Dependent Claim
22 words
A process according to claim 3 comprising oxidizing the furnace black with a mixture of nitrogen dioxide and air at 80°-200° C.
References Cited (Backward Citations)
GB1041848A
Cited
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FR1596496A
Cited
US3787562A
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US3865926A
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US4014654A
Cited
US4075156A
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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) | 1983-09-09 | 1984-03-10 | 1984-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-09 | 1988-03-10 | 1988-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-09 | 1992-03-10 | 1992-09-09 | $7700.00 | Window Closed / Lapsed |