US4341701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of pigments
Assignee: BASF Corp
•
Filing: 1980-11-04
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Granted: 1982-07-27
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Expires: 2000-11-04
Abstract
Abstract A process for producing monoazo or disazo pigments, which process comprises: (a) adding to a solution of a diazonium and/or tetrazonium salt of an aromatic or heterocyclic amine a solution or suspension containing 0.1-50% by weight of the theoretically required total weight of one or more coupling components, and (b) using the product from step (a) as an additive in the production of a monoazo pigment, a disazo pigment or a mixture of monoazo and disazo pigments. Compared with products produced by conventional methods, the pigments produced in the manner described above have a greater coloring strength, improved transparency, improved flow properties, and a higher degree of dispersibility.
Inventors
- 👤 David T. Pechey
- 👤 John H. Coy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:15
CPC Classifications
C; C09; C09B; C09B41/00; C09B41/006; C09B29/00; C09B35/00; C09B35/02; C09B35/039; C09B35/08; C09B35/10; C09B35/105; C09B67/00; C09B67/0033; C09B67/0046
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
76 words
A process for producing monoazo or disazo pigments, which comprises (a) adding to a solution of a diazonium and/or tetrazonium salt of an aromatic or heterocyclic amine a solution or suspension containing 0.1-50% by weight of the theoretically required total weight of one or more coupling components, and (b) using the product from step (a) as an additive in the production of a monoazo pigment, a disazo pigment or a mixture of monoazo and disazo pigments.
Claim 2
Dependent Claim
76 words
A process for producing monoazo or disazo pigments, which comprises (a) adding to a solution of a diazonium and/or tetrazonium salt of an aromatic or heterocyclic amine a solution or suspension containing 0.1-50% by weight of the theoretically required total weight of one or more coupling components, and (b) using the product from step (a) as an additive in the production of a monoazo pigment, a disazo pigment or a mixture of monoazo and disazo pigments.
Claim 3
Dependent Claim
86 words
A process for producing monoazo or disazo pigments, which process comprises (a) adding to a solution of a diazonium and/or tetrazonium salt of an aromatic or heterocyclic amine a solution or suspension containing 0.1-50% by weight of the theoretically required total weight of one or more coupling components, and (b) completing the coupling reaction by adding the partially coupled product obtained according to step (a) to a solution or suspension of one or more coupling components identical to or different from those used in step (a).
Claim 4
Dependent Claim
86 words
A process for producing monoazo or disazo pigments, which process comprises (a) adding to a solution of a diazonium and/or tetrazonium salt of an aromatic or heterocyclic amine a solution or suspension containing 0.1-50% by weight of the theoretically required total weight of one or more coupling components, and (b) completing the coupling reaction by adding the partially coupled product obtained according to step (a) to a solution or suspension of one or more coupling components identical to or different from those used in step (a).
Claim 5
Dependent Claim
27 words
A process according to claim 1, wherein 0.1% by weight of the theoretically required total weight of one or more coupling components is used in step (a).
Claim 6
Dependent Claim
27 words
A process according to claim 1, wherein 0.1-30% by weight of the theoretically required total weight of one or more coupling components is used in step (a).
Claim 7
Dependent Claim
17 words
A process according to claim 1, wherein one or two coupling components are used in step (a).
Claim 8
Dependent Claim
17 words
A process according to claim 1, wherein one or two coupling components are used in step (b).
Claim 9
Dependent Claim
19 words
A process according to claim 1, wherein one coupling component is used in each of steps (a) and (b).
Claim 10
Dependent Claim
20 words
A process according to claim 1, wherein the same coupling component is used in each of steps (a) and (b).
Claim 11
Dependent Claim
32 words
A process according to claim 1, wherein the partially coupled diazonium or tetrazonium salt from step (a) is further processed directly as a solution or suspension, or is isolated before step (b).
Claim 12
Dependent Claim
12 words
A process according to claim 1, wherein a tetrazonium salt is used.
Claim 13
Dependent Claim
25 words
A process according to claim 1, wherein the tetrazonium salt is a tetrazotised 3,3'-dichlorobenzidine, an o-dianisidine, a tetrachlorobenzidine, a dinitrobenzidine, an o,o'-dimethylbenzidine or a 2,2'-disulfobenzidine.
Claim 14
Dependent Claim
36 words
A process according to claim 1, wherein the diazonium salt is a diazotised heterocyclic amine or an aniline derivative, which can be substituted with one or more alkyl, aryl, aralkyl, nitro, alkoxy, aryloxy or halogen groups.
Claim 15
Dependent Claim
17 words
A process according to claim 11, wherein the diazonium salt is a diazotised aniline containing water-solubilising groups.
Claim 16
Dependent Claim
22 words
A process according to claim 1, wherein the coupling component used in steps (a) and (b) is an acetoacetarylamide or a pyrazolone.
Claim 17
Dependent Claim
16 words
A process according to claim 1, wherein a water-soluble dye is added to the product obtained.
Claim 18
Dependent Claim
37 words
A process according to claim 14, wherein the water-soluble dye has been obtained by coupling of tetrazotised benzidine with an acetoacetanilide or pyrazolone, the azo and/or the coupling component containing one or more sulfo or carboxyl groups.
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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) | 1985-07-26 | 1986-01-25 | 1986-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-26 | 1990-01-25 | 1990-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-26 | 1994-01-25 | 1994-07-27 | $7700.00 | Window Closed / Lapsed |