Patent US775215A successfully refreshed from Google Patents.
Patent US4272298A successfully refreshed from Google Patents.
US4272298A
Expired / Lapsed
US
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Process for conditioning a pigment in liquid ammonia
Assignee: BASF Corp
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Filing: 1979-09-18
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Granted: 1981-06-09
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Expires: 1999-09-18
Abstract
Abstract A process for conditioning a pigment or disperse dye which comprises treating the colorant with liquid ammonia and results in an improvement of the dyeing properties and may be accompanied by a conversion into another modification. The pigments afforded by the instant process are particularly suitable for pigmenting material of high molecular weight.
Inventors
- 👤 Fridolin Babler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:06
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0001; C09B67/002; C09B57/00; C09B57/04; C09B67/0025
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
63 words
A process for conditioning an organic pigment selected from the group consisting of isoindolinone, azo, metal complex, quinacridone and quinophthalone pigments with liquid ammonia which comprises: (a) treating the pigment with liquid ammonia in the absence of water or organic solvent; and (b) isolating the pigment by filtration and subsequent removal of the ammonia by evaporation or by direct evaporation of the ammonia.
Claim 2
Dependent Claim
63 words
A process for conditioning an organic pigment selected from the group consisting of isoindolinone, azo, metal complex, quinacridone and quinophthalone pigments with liquid ammonia which comprises: (a) treating the pigment with liquid ammonia in the absence of water or organic solvent; and (b) isolating the pigment by filtration and subsequent removal of the ammonia by evaporation or by direct evaporation of the ammonia.
Claim 3
Dependent Claim
17 words
A process according to claim 1, wherein the pigment is treated at elevated temperature and elevated pressure.
Claim 4
Dependent Claim
22 words
A process as claimed in claim 1, wherein the liquid ammonia contains a dissolved assistant which precipitates on evaporation of the ammonia.
Claim 5
Dependent Claim
78 words
A process for conditioning an organic pigment selected from the group consisting of isoindolinone, azo, metal complex, quinacridone and quinophthalone pigments with liquid ammonia which comprises: (a) treating the pigment with liquid ammonia in the absence of water or organic solvent; (b) partially evaporating the ammonia to form a pigment suspension; (c) diluting the suspension with an organic solvent or water; and (d) isolating the pigment by filtration and subsequent removal of the ammonia, organic solvent or water.
Claim 6
Dependent Claim
78 words
A process for conditioning an organic pigment selected from the group consisting of isoindolinone, azo, metal complex, quinacridone and quinophthalone pigments with liquid ammonia which comprises: (a) treating the pigment with liquid ammonia in the absence of water or organic solvent; (b) partially evaporating the ammonia to form a pigment suspension; (c) diluting the suspension with an organic solvent or water; and (d) isolating the pigment by filtration and subsequent removal of the ammonia, organic solvent or water.
Claim 7
Dependent Claim
16 words
A process according to claim 4, wherein the pigment is treated with ammonia and resinic acid.
Claim 8
Dependent Claim
21 words
A process as claimed in claim 1, wherein the treatment is carried out in the presence of a benzenesulphonic acid N-methylamide.
References Cited (Backward Citations)
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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) | 1984-06-08 | 1984-12-08 | 1985-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-08 | 1988-12-08 | 1989-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-08 | 1992-12-08 | 1993-06-09 | $7700.00 | Window Closed / Lapsed |