Patent US4239685A successfully refreshed from Google Patents.
US4239685A
Expired / Lapsed
US
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Process for the preparation of phthalocyanine pigments
Assignee: Produits Chimiques Ugine Kuhlmann
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Filing: 1979-02-14
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Granted: 1980-12-16
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Expires: 1999-02-14
Abstract
Abstract A process for the preparation of phthalocyanine pigments from a phthalocyanine press paste obtained by hydrolysis of a sulphuric solution of phthalocyanine, in which a small quantity of a water-insoluble crystallizing solvent, in the presence or absence of a non-crystallizing solvent, is incorporated with stirring in said press paste, and then the solvent or solvents is or are eliminated and the paste is dried, and the pigments thus obtained are collected.
Inventors
- 👤 Daniel Pigasse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:58
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0014; C09B67/0016; C09B67/0025; C09B67/0026
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
100 words
A process for the preparation of a phthalocyanine pigment from a press paste of phthalocyanine obtained by hydrolysis of a sulphuric solution of phthalocyanine, which consists in incorporating while stirring in said press paste a member selected from the group consisting of from 1% to 20% by weight with respect to the weight of phthalocyanine of a water-insoluble crystallizing solvent and a mixture of said water-insoluble crystallizing solvent with from 1% to 20% by weight with respect to the phthalocyanine of a non-crystallizing solvent, then removing said solvent or solvents and drying the paste, and collecting the pigments thus obtained.
Claim 2
Dependent Claim
100 words
A process for the preparation of a phthalocyanine pigment from a press paste of phthalocyanine obtained by hydrolysis of a sulphuric solution of phthalocyanine, which consists in incorporating while stirring in said press paste a member selected from the group consisting of from 1% to 20% by weight with respect to the weight of phthalocyanine of a water-insoluble crystallizing solvent and a mixture of said water-insoluble crystallizing solvent with from 1% to 20% by weight with respect to the phthalocyanine of a non-crystallizing solvent, then removing said solvent or solvents and drying the paste, and collecting the pigments thus obtained.
Claim 3
Dependent Claim
42 words
The process according to claim 1 in which the water-insoluble crystallizing solvent used is selected from the group consisting of benzene, toluene, a xylene, chlorobenzene, a dichlorobenzene, a trichlorobenzene, nitrobenzene, trichloroethylene, tetrachloroethylene, nonylphenol, N-dimethylaniline, N-diethylaniline, ethyl benzoate and mixtures of said compounds.
Claim 4
Dependent Claim
31 words
The process according to claim 2 in which the amount of crystallizing solvent incorporated in the paste is from 3% to 10% by weight with respect to the weight of phthalocyanine.
Claim 5
Dependent Claim
32 words
The process according to claim 3 in which the phthalocyanine press paste used in a press paste of a member selected from the group consisting of copper phthalocyanine and chlorinated copper phthalocyanine.
Claim 6
Dependent Claim
32 words
The process according to claim 2 in which the phthalocyanine press paste used is a press paste of a member selected from the group consisting of copper phthalocyanine and chlorinated copper phthalocyanine.
Claim 7
Dependent Claim
32 words
The process according to claim 1 in which the phthalocyanine press paste used is a press paste of a member selected from the group consisting of copper phthalocyanine and chlorinated copper phthalocyanine.
Claim 8
Dependent Claim
31 words
The process according to claim 1 in which the amount of crystallizing solvent incorporated in the paste is from 3% to 10% by weight with respect to the weight of phthalocyanine.
Claim 9
Dependent Claim
15 words
The process according to claim 1 in which the water-insoluble crystallizing solvent alone is used.
Claim 10
Dependent Claim
42 words
The process according to claim 8 in which the water-insoluble crystallizing solvent used is selected from the group consisting of benzene, toluene, a xylene, chlorobenzene, a dichlorobenzene, a trichlorobenzene, nitrobenzene, trichloroethylene, tetrachloroethylene, nonylphenol, N-dimethylaniline, N-diethylaniline, ethyl benzoate and mixtures of said compounds.
Claim 11
Dependent Claim
31 words
The process according to claim 9 in which the amount of crystallizing solvent incorporated in the paste is from 3% to 10% by weight with respect to the weight of phthalocyanine.
Claim 12
Dependent Claim
32 words
The process according to claim 10 in which the phthalocyanine press paste used is a press paste of a member selected from the group consisting of copper phthalocyanine and chlorinated copper phthalocyanine.
Claim 13
Dependent Claim
32 words
The process according to claim 9 in which the phthalocyanine press paste used in a press paste of a member selected from the group consisting of copper phthalocyanine and chlorinated copper phthalocyanine.
Claim 14
Dependent Claim
32 words
The process according to claim 8 in which the phthalocyanine press paste used in a press paste of a member selected from the group consisting of copper phthalocyanine and chlorinated copper phthalocyanine.
Claim 15
Dependent Claim
31 words
The process according to claim 8 in which the amount of crystallizing solvent incorporated in the paste is from 3% to 10% by weight with respect to the weight of phthalocyanine.
Claim 16
Dependent Claim
39 words
The process according to claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14 in which the solvent or solvents is or are eliminated by evaporation during the drying phase of the paste.
Claim 17
Dependent Claim
36 words
The process according to claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14 in which the solvent or solvents is or are eliminated by steam-distillation before drying the paste.
Claim 18
Dependent Claim
41 words
The process according to claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14 in which the crystallizing solvent has an acid or basic character and is eliminated by solubilizing it in water by salification.
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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) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |