Patent US4063877A successfully refreshed from Google Patents.
US4063877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing methods
Assignee: LB Holliday and Co Ltd
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Filing: 1975-11-26
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Granted: 1977-12-20
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Expires: 1995-11-26
Abstract
Abstract The invention is concerned with a change in the current practice of dyeing natural and synthetic polyamide materials with reactive dyestuffs. The invention involves pre-treating the material to be dyed with an amphoteric auxiliary in a bath which is brought rapidly to the later dyeing temperature and which contains an amphoteric auxiliary preferably at a pH buffered within a specific range. It is found that the pre-treated material takes on the reactive dyestuff very readily and that the dyed materials have a good fastness. A major achievement is that the dyeing time is cut to about one-half of that presently employed.
Inventors
- 👤 Alexander Elliot
- 👤 John Gerald Lee
- 👤 Brian Lever
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:24
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/10; D06P1/00; D06P1/44; D06P1/60
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
A method of dyeing machine washable wool fibers, the fibers having been chlorinated and resin-treated to provide machine washability, the method comprising: i. pre-treating the fibers in an aqueous bath containing a levelling agent for the dye, the pre-treatment being carried out at the dyeing temperature for a period of time in the range of from about 10 to 30 minutes, the dyeing temperature being in the range of from 70° C to the boiling point; ii. adding to the bath a solution of a dyestuff material comprising at least one reactive dye, to form a dye bath; and iii. dyeing the pre-treated fibers in the dye bath at the dyeing temperature.
Claim 2
Independent Claim
112 words
A method of dyeing machine washable wool fibers, the fibers having been chlorinated and resin-treated to provide machine washability, the method comprising: i. pre-treating the fibers in an aqueous bath containing a levelling agent for the dye, the pre-treatment being carried out at the dyeing temperature for a period of time in the range of from about 10 to 30 minutes, the dyeing temperature being in the range of from 70° C to the boiling point; ii. adding to the bath a solution of a dyestuff material comprising at least one reactive dye, to form a dye bath; and iii. dyeing the pre-treated fibers in the dye bath at the dyeing temperature.
Claim 3
Dependent Claim
27 words
The method of claim 1 wherein the levelling agent is an amphoteric material selected from the group consisting of amphoteric polyglycol-ether derivitives and weakly cationic levelling agents.
Claim 4
Dependent Claim
32 words
A method according to claim 1 in which the bath in which the pre-treatment (i) is effected is buffered to a pH within the range of from about 4 to about 7.
Claim 5
Dependent Claim
25 words
A method according to claim 2 in which the bath is buffered to a pH within the range of from substantially 5.75 to substantially 6.5.
Claim 6
Dependent Claim
24 words
A method according to claim 1 in which a dyeing temperature is within the range of from about 70° C to about 100° C.
Claim 7
Dependent Claim
35 words
A method according to claim 1 in which at least one reactive dye selected from the group consisting of Anthraquinone and Azo dyestuffs having at least one reactive group is employed for said dyestuff material.
Claim 8
Dependent Claim
23 words
A method according to claim 6 in which said reactive group is selected from the group consisting of α-bromacryloylamino, monochlorotriazinyl, dichlorotriazinyl and chloroacetyl.
Claim 9
Dependent Claim
28 words
A method according to claim 1 in which said material to be dyed is selected from the group consisting of machine washable wools and machine washable wool mixtures.
References Cited (Backward Citations)
GB1204411A
Cited
US3627475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |