US4063957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of easily dispersed transparent iron oxide pigments
Assignee: BASF SE
•
Filing: 1977-01-10
•
Granted: 1977-12-20
•
Expires: 1997-01-10
Abstract
Abstract A process for the manufacture of easily dispersed, transparent iron oxide pigments of high tinctorial strength, in which the pigment paste, moist with water, is homogenized under the action of shear forces in the presence of at least one monohydric aliphatic or cycloaliphatic alcohol of 4 to 12 carbon atoms which is partially soluble in water and can be vaporized without decomposition, and the kneaded mixture is then dried under gentle conditions. The pigments are easily dispersed in finishes or binder solutions for printing inks. Very pure and glossy colorations of optimum transparency are obtained.
Inventors
- 👤 Hans Peter von Lauff
- 👤 Wolfgang Fabian
- 👤 Heidrun Hellstern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:05
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/03; C09D11/037; C09C; C09C1/00; C09C1/22; C09C1/24; C01; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
90 words
A process for the manufacture of easily dispersed, transparent iron oxide pigments of high tinctorial strength from iron oxide pigment pastes moist with water, which comprises homogenizing said paste in the presence of from 0.1 to 20 percent by weight, based on dry iron oxide, of a monohydric aliphatic or cycloaliphatic alcohol of 4 to 12 carbon atoms, which is only partially soluble in water and can be vaporized without decomposition, or of mixtures of such alcohols, under the action of shear forces, and drying the mixture under gentle conditions.
Claim 2
Dependent Claim
90 words
A process for the manufacture of easily dispersed, transparent iron oxide pigments of high tinctorial strength from iron oxide pigment pastes moist with water, which comprises homogenizing said paste in the presence of from 0.1 to 20 percent by weight, based on dry iron oxide, of a monohydric aliphatic or cycloaliphatic alcohol of 4 to 12 carbon atoms, which is only partially soluble in water and can be vaporized without decomposition, or of mixtures of such alcohols, under the action of shear forces, and drying the mixture under gentle conditions.
Claim 3
Dependent Claim
27 words
A process as claimed in claim 1, wherein from 5 to 15 percent by weight, based on iron oxide, of the aliphatic or cycloaliphatic alcohols are used.
Claim 4
Dependent Claim
20 words
A process as claimed in claim 1, wherein aliphatic or cycloaliphatic alcohols of 5 to 12 carbon atoms are used.
Claim 5
Dependent Claim
44 words
A process as claimed in claim 1, wherein n-butanol, isobutanol, sec.-butanol, 1-pentanol, isopentanol, 2-methylpentanol, 2,2-dimethylpropanol, 1-hexanol, isohexanol, 1-heptanol, isoheptanol, 2,4-dimethyl-3-pentanol, 1-octanol, isooctanol, 2-ethyl-1-hexanol, nonanol, isononanol, 1-decanol, isodecanol, 2,2,5,5-tetramethyl-3-hexanol, 1-dodecanol, 6-dodecanol, isododecanol, cyclohexanol, 1-methyl-1-cyclohexanol, 1-ethyl-1-cyclohexanol or mixtures thereof are used as monohydric, partially water-soluble alcohols.
Claim 6
Dependent Claim
41 words
A process as claimed in claim 3, wherein 1-pentanol, isopentanol, 2-methylpentanol, 2,2-dimethylpropanol, 1-hexanol, isohexanol, 1-heptanol, isoheptanol, 2,4-dimethyl-3-pentanol, 1-octanol, isooctanol, 2-ethyl-1-hexanol, nonanol, isononanol, 1-decanol, isodecanol, 2,2,5,5-tetramethyl-3-hexanol, 1-dodecanol, 6-dodecanol, isododecanol, cyclohexanol, 1-methyl-1-cyclohexanol, 1-ethyl-1-cyclohexanol or mixtures thereof are used as monohydric, partially water-soluble alcohols.
Claim 7
Dependent Claim
15 words
A process as claimed in claim 1, wherein the homogenized mixture is isolated by freeze-drying.
Claim 8
Dependent Claim
27 words
A process as claimed in claim 6, wherein 2,2-dimethyl-1-propanol (neopentyl alcohol), 2,4-dimethyl-3-pentanol, 2,2,5,5-tetramethyl-3-hexanol, 1-decanol, 1-dodecanol, 6-dodecanol, cyclohexanol, 1-ethylcyclohexanol and 1-methylcyclohexanol are used as monohydric, partially water-soluble alcohols.
Claim 9
Dependent Claim
20 words
A process as claimed in claim 1, wherein n-octanol, 2,2-dimethyl-1-propanol, 1-dodecanol or cyclohexanol are used as monohydric, partially water-soluble alcohols.
Claim 10
Dependent Claim
26 words
A process as claimed in claim 1, wherein the mixture is exposed to the action of the shear forces at from room temperature to 95° C.
Claim 11
Dependent Claim
25 words
A process as claimed in claim 3, wherein the mixture is exposed to the action of the shear forces at from 35° to 65° C.
Claim 12
Dependent Claim
32 words
A process for the manufacture of red iron oxide pigments, wherein the iron oxides obtained according to the process as claimed in claim 1 are heated at from 160° to 400° C.
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) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |