US6013126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for conditioning organic pigments
Assignee: Covestro LLC
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Filing: 1998-11-25
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Granted: 2000-01-11
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Expires: 2018-11-25
Abstract
Abstract This invention relates to a process for conditioning organic pigments by (a) grinding a crude organic pigment at a temperature of about 0 DEG C. to about 100 DEG C. in the presence of (i) about 1 to about 10 parts by weight, relative to the organic pigment, of an inorganic salt and (ii) about 1 to about 5 parts by weight, relative to the organic pigment, of a liquid in which the organic pigment and salt are substantially insoluble, to form a pigment paste; (b) grinding the pigment paste at a temperature of about 0 DEG C. to about 100 DEG C. in the presence of about 0.05 to about 1 parts by weight, relative to the organic pigment, of a C8-C10 alkanoic acid to form a treated pigment paste; (c) stirring the treated pigment paste with water or water containing an acid and/or an organic liquid to complete the conditioning of the organic pigment; and (d) isolating the conditioned organic pigment.
Inventors
- 👤 Charles E. Shannon
- 👤 Abdul Sattar
- 👤 Robert C. Mott
- 👤 Thomas R. Flatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:29
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0017; C09B67/0014
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
165 words
A process for conditioning an organic pigment comprising (a) grinding a crude organic pigment at a temperature of about 0° C. to about 100° C. in the presence of (i) about 1 to about 10 parts by weight, relative to the organic pigment, of an inorganic salt and (ii) about 1 to about 5 parts by weight, relative to the organic pigment, of a liquid in which the organic pigment and salt are substantially insoluble, to form a pigment paste; (b) grinding the pigment paste at a temperature of about 0° C. to about 100° C. in the presence of about 0.05 to about 1 parts by weight, relative to the organic pigment, of a C 8 -C 10 alkanoic acid to form a treated pigment paste; (c) stirring the treated pigment paste with water or water containing an acid capable of forming soluble metal salts and/or an organic liquid to complete the conditioning of the organic pigment; and (d) isolating the conditioned organic pigment.
Claim 2
Dependent Claim
165 words
A process for conditioning an organic pigment comprising (a) grinding a crude organic pigment at a temperature of about 0° C. to about 100° C. in the presence of (i) about 1 to about 10 parts by weight, relative to the organic pigment, of an inorganic salt and (ii) about 1 to about 5 parts by weight, relative to the organic pigment, of a liquid in which the organic pigment and salt are substantially insoluble, to form a pigment paste; (b) grinding the pigment paste at a temperature of about 0° C. to about 100° C. in the presence of about 0.05 to about 1 parts by weight, relative to the organic pigment, of a C 8 -C 10 alkanoic acid to form a treated pigment paste; (c) stirring the treated pigment paste with water or water containing an acid capable of forming soluble metal salts and/or an organic liquid to complete the conditioning of the organic pigment; and (d) isolating the conditioned organic pigment.
Claim 3
Dependent Claim
19 words
A process according to claim 1 wherein the organic pigment is a perylene, dioxazine, quinacridone, phthalocyanine, or indanthrone pigment.
Claim 4
Dependent Claim
17 words
A process according to claim 1 wherein the inorganic salt used in step (a) is sodium chloride.
Claim 5
Dependent Claim
17 words
A process according to claim 1 wherein the liquid used in step (a) is an aliphatic glycol.
Claim 6
Dependent Claim
16 words
A process according to claim 1 wherein the liquid used in step (a) is propylene glycol.
Claim 7
Dependent Claim
21 words
A process according to claim 1 wherein step (a) is carried out at a temperature of 30° C. to 60° C.
Claim 8
Dependent Claim
28 words
A process according to claim 1 wherein the C 8 -C 10 alkanoic acid used in step (b) is a branched chain C 8 -C 10 alkanoic acid.
Claim 9
Dependent Claim
21 words
A process according to claim 1 wherein the C 8 -C 10 alkanoic acid used in step (b) is neodecanoic acid.
Claim 10
Dependent Claim
21 words
A process according to claim 1 wherein step (b) is carried out at a temperature of 30° C. to 60° C.
Claim 11
Dependent Claim
33 words
A process according to claim 1 wherein about 0.1 to about 0.25 parts by weight of the C 8 -C 10 alkanoic acid, relative to the organic pigment, are used in step (b).
Claim 12
Dependent Claim
20 words
A process according to claim 1 wherein in step (c) the pigment paste from step (b) is stirred with water.
Claim 13
Dependent Claim
23 words
A process according to claim 1 wherein in step (c) the pigment paste from step (b) is stirred with water containing an acid.
Claim 14
Dependent Claim
23 words
A process according to claim 10 wherein the acid capable of forming soluble metal salts is a mineral acid or an organic acid.
Claim 15
Dependent Claim
23 words
A process according to claim 1 wherein step (c) is carried out at a temperature of about 90° C. to about 95° C.
Claim 16
Dependent Claim
10 words
An organic pigment conditioned by the process of claim 1.
Claim 17
Dependent Claim
17 words
A pigmented macromolecular material containing as pigment an organic pigment conditioned by the process of claim 1.
References Cited (Backward Citations)
US2905685A
Cited
US3342823A
Cited
US3264300A
Cited
US4077972A
Cited
US3936315A
Cited
US4287000A
Cited
US4298399A
Cited
US4404036A
Cited
US4493734A
Cited
US4970248A
Cited
US5776238A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-01-10 | 2003-07-12 | 2004-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-01-10 | 2007-07-12 | 2008-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-01-10 | 2011-07-12 | 2012-01-11 | $7700.00 | Window Closed / Lapsed |