US4388078A
Expired / Lapsed
US
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Anthraquinone dyestuff modification
Assignee: Bayer Corp
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Filing: 1982-03-24
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Granted: 1983-06-14
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Expires: 2002-03-24
Abstract
Abstract The present invention is concerned with modifying the crystal form of the anthraquinone of the formula ##STR1## so as to render it more suitable for disperse dyeing and to improve its performance in thermosol dyeing. The modification is effected by heating the dyestuff at elevated temperatures, preferably between 90° and 185° C. until the Debye-Scherrer strong intensity spacings appear at 6.5A°, 18.1A° and 20.6A°. It is also concerned with disperse and thermosol dyeing processes utilizing this crystal modification and with aqueous dispersions of this crystal modification.
Inventors
- 👤 Thomas J. Thomas
- 👤 Robert G. Hoquet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:12
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/16; D06P1/20; C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/36; C09B1/50; C09B1/54; C09B1/547; C09B67/00; C09B67/0001; C09B67/0014; C09B67/0025; C09B67/0027; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
56 words
A modification of the anthraquinone dyestuff of the formula ##STR3## characterized by a melting point of 199°-200° C., with lattice plane spacings of strong intensity at 6.5 A°, 18.1 A° and 20.6 A°; of moderate intensity at 10.2 A°, 10.4 A°, 15.9 A°, 16.4 A°; of faint intensity at 21.0 A°, 28.5 A° and 28.9 A°.
Claim 2
Dependent Claim
56 words
A modification of the anthraquinone dyestuff of the formula ##STR3## characterized by a melting point of 199°-200° C., with lattice plane spacings of strong intensity at 6.5 A°, 18.1 A° and 20.6 A°; of moderate intensity at 10.2 A°, 10.4 A°, 15.9 A°, 16.4 A°; of faint intensity at 21.0 A°, 28.5 A° and 28.9 A°.
Claim 3
Dependent Claim
68 words
A process for preparing the anthraquinone dyestuff modification of claim 1, characterized by heating an aqueous slurry of the modification of the anthraquinone dyestuff of the formula ##STR4## with lattice plane spacings of strong intensity at 7.2 A°, 19.0 A° and 19.4 A°; medium intensity at 11.2 A°, 13.2 A°, 17.0 A° and 27.8 A°; faint intensity at 9.7 A°, 12.9 A° and 29.8 A° to 90°-185° C.
Claim 4
Dependent Claim
13 words
A process according to claim 2, wherein said process temperatures are 125°-150° C.
Claim 5
Dependent Claim
12 words
Dyeing and printing preparations containing the anthraquinone dyestuff modification of claim 1.
Claim 6
Dependent Claim
11 words
Synthetic resins colored with the anthraquinone dyestuff modification of claim 1.
Claim 7
Dependent Claim
85 words
In a process for the disperse dyeing of polyester fabrics with the anthraquinone dyestuff of the formula ##STR5## the improvement comprising: (a) heat treating the crystal modification of said dyestuff having lattice spacings of strong intensity at 7.2 A°, 19.0 A° and 19.4 A° at temperatures of between 90° and 185° C. until substantially all of the dyestuff has strong intensity lattice spacings at 6.5 A°, 18.1 A° and 20.6 A° by Debye-Scherrer X-ray analysis; and (b) stably dispersing said dyestuff in an aqueous media.
Claim 8
Dependent Claim
85 words
In a process for the disperse dyeing of polyester fabrics with the anthraquinone dyestuff of the formula ##STR5## the improvement comprising: (a) heat treating the crystal modification of said dyestuff having lattice spacings of strong intensity at 7.2 A°, 19.0 A° and 19.4 A° at temperatures of between 90° and 185° C. until substantially all of the dyestuff has strong intensity lattice spacings at 6.5 A°, 18.1 A° and 20.6 A° by Debye-Scherrer X-ray analysis; and (b) stably dispersing said dyestuff in an aqueous media.
Claim 9
Dependent Claim
18 words
The process of claim 6 wherein the dyeing is conducted at temperatures above 100° C. under super-atmospheric pressure.
Claim 10
Dependent Claim
17 words
The process of claim 6 wherein the dyeing is conducted in a boiling water under atmospheric pressure.
Claim 11
Dependent Claim
45 words
In a process for the thermosol dyeing of polyester fabrics with the anthraquinone dyestuff of the formula ##STR6## the improvement comprising utilizing the crystal form of said dyestuff having strong intensity lattice spacings of 6.5 A°, 18.1 A° and 20.6 A° by Debye-Scherrer X-ray analysis.
Claim 12
Dependent Claim
45 words
In a process for the thermosol dyeing of polyester fabrics with the anthraquinone dyestuff of the formula ##STR6## the improvement comprising utilizing the crystal form of said dyestuff having strong intensity lattice spacings of 6.5 A°, 18.1 A° and 20.6 A° by Debye-Scherrer X-ray analysis.
Claim 13
Dependent Claim
51 words
An aqueous dispersion of the anthraquinone dyestuff of the formula ##STR7## having strong intensity lattice spacings of 6.5 A°, 18.1 A° and 20.6 A° by Debye-Scherrer X-ray analysis which is suitable for the disperse dyeing of polyester fabric either at the boil or at temperatures above 100° C. under super-atmospheric pressure.
Claim 14
Dependent Claim
51 words
An aqueous dispersion of the anthraquinone dyestuff of the formula ##STR7## having strong intensity lattice spacings of 6.5 A°, 18.1 A° and 20.6 A° by Debye-Scherrer X-ray analysis which is suitable for the disperse dyeing of polyester fabric either at the boil or at temperatures above 100° C. under super-atmospheric pressure.
Claim 15
Dependent Claim
62 words
A process for rendering the anthraquinone dyestuff of the formula ##STR8## having strong intensity lattice spacings of 7.2 A°, 19.0 A° and 19.4 A° by Debye-Scherrer X-ray analysis suitable for the disperse dyeing of polyester fabrics comprising heating it until the crystal form has been substantially completely modified to display strong intensity lattice spacings at 6.5 A°, 18.1 A° and 20.6 A°.
Claim 16
Dependent Claim
62 words
A process for rendering the anthraquinone dyestuff of the formula ##STR8## having strong intensity lattice spacings of 7.2 A°, 19.0 A° and 19.4 A° by Debye-Scherrer X-ray analysis suitable for the disperse dyeing of polyester fabrics comprising heating it until the crystal form has been substantially completely modified to display strong intensity lattice spacings at 6.5 A°, 18.1 A° and 20.6 A°.
Claim 17
Dependent Claim
12 words
The process of claim 11 wherein the dyestuff is heated in bulk.
Claim 18
Dependent Claim
14 words
The process of claim 11 wherein the dyestuff is heated in an aqueous medium.
Claim 19
Dependent Claim
40 words
A powder of the anthraquinone dyestuff having the formula ##STR9## and displaying strong intensity lattice spacings of 6.5 A°, 18.1 A° and 20.6 A° by Debye-Scherrer X-ray analysis, said powder having a maximum particle size less than about one micron.
Claim 20
Dependent Claim
40 words
A powder of the anthraquinone dyestuff having the formula ##STR9## and displaying strong intensity lattice spacings of 6.5 A°, 18.1 A° and 20.6 A° by Debye-Scherrer X-ray analysis, said powder having a maximum particle size less than about one micron.
Claim 21
Dependent Claim
50 words
The anthraquinone dyestuff of the formula ##STR10## which displays strong intensity lattice spacings by Debye-Scherrer X-ray analysis of 6.5 A°, 18.1 A° and 20.6 A° in sufficiently finely divided form to form a stable aqueous dispersion with the aid of dispersants suitable for the disperse exhaust dyeing of synthetic fibers.
Claim 22
Dependent Claim
50 words
The anthraquinone dyestuff of the formula ##STR10## which displays strong intensity lattice spacings by Debye-Scherrer X-ray analysis of 6.5 A°, 18.1 A° and 20.6 A° in sufficiently finely divided form to form a stable aqueous dispersion with the aid of dispersants suitable for the disperse exhaust dyeing of synthetic fibers.
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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) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |