US3934972A
Expired / Lapsed
US
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Dyeing process
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1974-03-18
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Granted: 1976-01-27
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Expires: 1994-03-18
Abstract
Abstract Dyeing cellulose or cellulose/polyester blends by applying unsulphonated dyestuffs containing cyclic anhydride groups, anhydride-forming dicarboxylic acid groups or half-esters or half-amides thereof, as free acids or as salts with ammonia or volatile amines, and heating the fibre until dyestuff fixation takes place.
Inventors
- 👤 Colin William Greenhalgh
- 👤 David Francis Newton
- 👤 Dennis Eckersley
- 👤 Ian Cheetham
- 👤 Duncan Adrian Sidney Phillips
- 👤 Kenneth Dunkerley
- 👤 Gerald Williams
- 👤 Vibhas Chokshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:02
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/24; C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/32; C09B1/50; C09B1/503; C09B1/51; C09B1/514; C09B1/54; C09B1/547; C09B23/00; C09B23/14; C09B23/143; C09B29/00; C09B31/00; C09B31/02; C09B31/025; C09B33/00; C09B47/00; C09B47/04; C09B47/08; C09B47/24; C09B47/26; C09B5/00; C09B5/02; C09B5/14; C09B51/00; C09B62/00; C09B62/02; C09B62/04; C09B62/44; C09B62/78; C09B69/00; D06P1/00; D06P1/38; D06P3/10; D06P3/34; D06P3/52; D06P3/54; D06P3/58; D06P3/60; D06P3/6033; D06P3/66; D06P3/82; D06P3/8204; D06P3/8223; D06P3/8228; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924; Y10S8/933
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
100 words
A process for dyeing textile fibers comprising cellulose or blends of cellulose with polyester fibres which process comprises applying to said fibres an unsulphonated dyestuff containing a dicarboxylic cyclic anhydride grouping or a dicarboxylic acid grouping such that cyclic anhydride formation can occur by loss of water therefrom, or a half ester or half amide of such a dicarboxylic acid grouping, any carboxylic acid group in the said dyestuff being present in free acid form or in the form of a salt with ammonia or a volatile amine, and heating the textile fibre until fixation of the dyestuff takes place.
Claim 2
Dependent Claim
100 words
A process for dyeing textile fibers comprising cellulose or blends of cellulose with polyester fibres which process comprises applying to said fibres an unsulphonated dyestuff containing a dicarboxylic cyclic anhydride grouping or a dicarboxylic acid grouping such that cyclic anhydride formation can occur by loss of water therefrom, or a half ester or half amide of such a dicarboxylic acid grouping, any carboxylic acid group in the said dyestuff being present in free acid form or in the form of a salt with ammonia or a volatile amine, and heating the textile fibre until fixation of the dyestuff takes place.
Claim 3
Dependent Claim
69 words
Process according to claim 1 wherein the said dyestuff contains a grouping ##EQU13## wherein R 1 is hydrogen or an alkyl or substituted alkyl group of 1 to 5 carbon atoms or an aryl group, R 2 is hydrogen or an alkyl or substituted alkyl group of 1 to 5 carbon atoms and A represents a molecule of ammonia or a volatile amine, particularly an aliphatic or cycloaliphatic amine.
Claim 4
Dependent Claim
26 words
Process according to claim 1 wherein said dyestuff contains a dicarboxylic grouping with the two CO groups thereof in adjacent positions on an carbocyclic aromatic ring.
Claim 5
Dependent Claim
19 words
Process according to claim 3 wherein the said two CO groups are in ortho position on a benzene ring.
Claim 6
Dependent Claim
26 words
Process according to claim 1 wherein said dyestuff contains a dicarboxylic grouping with the two CO groups thereof in anhydride forming positions on an alkyl chain.
Claim 7
Dependent Claim
19 words
Process according to claim 5 wherein the said two CO groups are in the 1,2-position on an alkyl chain.
Claim 8
Dependent Claim
31 words
Process according to claim 1 wherein said dyestuff contains a dicarboxylic grouping with one CO group on a carbocyclic aromatic ring and one in anhydride forming position on a side chain.
Claim 9
Dependent Claim
43 words
Process according to claim 1 wherein dyestuff in the form of a water-soluble salt is applied to the textile fibre and free acid dyestuff is thereafter liberated by means of mineral or organic acid or a substance which generates an acid on heating.
Claim 10
Dependent Claim
34 words
Process according to claim 1 wherein dyestuff is applied to the textile fibre from an aqueous or non-aqueous liquor or by a printing technique and subsequently baked or steamed at a temperature above 125°C.
Claim 11
Dependent Claim
21 words
Process according to claim 9 wherein the dyestuff is in the form of a salt with ammonia or a volatile amine.
Claim 12
Dependent Claim
12 words
Process according to claim 9 wherein the temperature is 180° to 210°C.
Claim 13
Dependent Claim
13 words
Process according to claim 1 wherein the dyestuff is of the azo series.
Claim 14
Dependent Claim
13 words
Process according to claim 1 wherein the dyestuff is of the anthraquinone series.
References Cited (Backward Citations)
US3163635A
Cited
GB1087673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |