Patent US2356683A successfully refreshed from Google Patents.
US3953162A
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Dyeing process
Assignee: Imperial Chemical Industries Ltd
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Filing: 1974-03-21
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Granted: 1976-04-27
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Expires: 1994-03-21
Abstract
Abstract Dyeing nylon by applying sulphonated or 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 21:56
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: 13
Claim 1
Independent Claim
144 words
A process for dyeing nylon fibers by applying thereto a dyestuff of the anthraquinone series 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, said dicarboxylic grouping not being on the anthraquinone nucleus and being either in ortho position on a benzene ring attached to said anthraquinone nucleus or in anhydride-forming position or positioned with one carboxyl group on a carbocyclic aromatic ring attached to said anthraquinone nucleus and the other in anhydride-forming position therewith on an alkyl side chain, and heating the nylon fiber until fixation of the dyestuff takes place.
Claim 2
Dependent Claim
144 words
A process for dyeing nylon fibers by applying thereto a dyestuff of the anthraquinone series 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, said dicarboxylic grouping not being on the anthraquinone nucleus and being either in ortho position on a benzene ring attached to said anthraquinone nucleus or in anhydride-forming position or positioned with one carboxyl group on a carbocyclic aromatic ring attached to said anthraquinone nucleus and the other in anhydride-forming position therewith on an alkyl side chain, and heating the nylon fiber until fixation of the dyestuff takes place.
Claim 3
Dependent Claim
65 words
Process according to claim 1 wherein the said dyestuff contains a grouping ##EQU17## or ##EQU18## 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.
Claim 4
Dependent Claim
18 words
Process according to claim 1 wherein the dyestuff contains at least one sulphonic acid group or salt thereof.
Claim 5
Dependent Claim
15 words
Process according to claim 3 wherein the dyestuff additionally contains another type of fibre-reactive grouping.
Claim 6
Dependent Claim
14 words
Process according to claim 4 wherein the said fibre-reactive grouping is a halogenotriazinyl grouping.
Claim 7
Dependent Claim
44 words
Process according to claim 1 wherein the dyestuff in the form of a water soluble salt is applied to nylon fibre and free acid dyestuff is thereafter liberated by means of mineral or organic acid or a substance with generates an acid on heating.
Claim 8
Dependent Claim
34 words
Process according to claim 1 wherein the dyestuff is applied to nylon 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 9
Dependent Claim
21 words
Process according to claim 7 wherein the dyestuff is in the form of a salt with ammonia or a volatile amine.
Claim 10
Dependent Claim
12 words
Process according to claim 7 wherein the temperature is 180° to 210°C.
Claim 11
Dependent Claim
13 words
Process according to claim 1 wherein the dyestuff is of the azo series.
Claim 12
Dependent Claim
13 words
Process according to claim 1 wherein the dyestuff is of the anthraquinone series.
Claim 13
Dependent Claim
15 words
The process of claim 2 wherein said volatile amine is an aliphatic or cycloaliphatic amine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-27 | 1979-10-27 | 1980-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-27 | 1983-10-27 | 1984-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-27 | 1987-10-27 | 1988-04-27 | $7700.00 | Window Closed / Lapsed |