US4348203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing process
Assignee: BASF Corp
•
Filing: 1980-07-07
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Granted: 1982-09-07
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Expires: 2000-07-07
Abstract
Abstract A process for dyeing textile fibres which comprises contacting the fibre with an active solvent containing dissolved dye in admixture with the necessary amount of a bulking inert substantially immiscible solvent, the active solvent under the conditions of dyeing being liquid, a solvent for the dye, insoluble or only slightly soluble in the inert solvent, and in which the fixation affinity of the fibre for the dye is greater than that of the active solvent for the dye at the temperature required for fixation.
Inventors
- 👤 James K. Skelly
- 👤 David G. Evans
- 👤 Barrie Broadbent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:05
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/651; D06P1/65106; D06P1/90; D06P1/92; D06P1/922; D06P1/928
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
129 words
A process for dyeing synthetic textile fibers consisting essentially of the steps of contacting said fibers at ambient temperature with a water-insoluble dyestuff in a two-phase liquid system in the substantial absence of a dispersing agent, said two-phase liquid system consisting essentially of a minor amount of an active solvent excluding chlorinated aliphatic hydrocarbons in admixture with the necessary amount of water to produce said two-phase liquid system, and subsequently rapidly raising the temperature for fixation of the dye, the active solvent under the conditions of dyeing being liquid, a solvent for the dye and only slightly soluble or insoluble in water and the fixation affinity of the fiber for the dye being greater than that of the active solvent for the dye at the temperature required for fixation.
Claim 2
Dependent Claim
129 words
A process for dyeing synthetic textile fibers consisting essentially of the steps of contacting said fibers at ambient temperature with a water-insoluble dyestuff in a two-phase liquid system in the substantial absence of a dispersing agent, said two-phase liquid system consisting essentially of a minor amount of an active solvent excluding chlorinated aliphatic hydrocarbons in admixture with the necessary amount of water to produce said two-phase liquid system, and subsequently rapidly raising the temperature for fixation of the dye, the active solvent under the conditions of dyeing being liquid, a solvent for the dye and only slightly soluble or insoluble in water and the fixation affinity of the fiber for the dye being greater than that of the active solvent for the dye at the temperature required for fixation.
Claim 3
Dependent Claim
34 words
A process as claimed in claim 1, wherein the active solvent toluene, 1-methyl naphthalene, butyl benzoate, 2-phenoxyethanol, methyl salicylate, 1,2-dichlorobenzene, ethyl salicylate, di-n-butyl phthalate, benzyl acetate, cyclohexanone, 1,2,4-trichlorobenzene, n-octoic acid, monochlorophenoxyethanol or benzyl alcohol.
Claim 4
Dependent Claim
13 words
A process as claimed in claim 1, wherein the active solvent is 2-phenoxyethanol.
Claim 5
Dependent Claim
13 words
A process as claimed in claim 1, wherein the active solvent is 1,2-dichlorobenzene.
Claim 6
Dependent Claim
13 words
A process as claimed in claim 1, wherein the active solvent is cyclohexanone.
Claim 7
Dependent Claim
14 words
A process as claimed in claim 1, wherein the active solvent is benzyl alcohol.
Claim 8
Dependent Claim
16 words
A process as claimed in claim 1, wherein the dyestuff used contains substantially no dispersing agent.
Claim 9
Dependent Claim
34 words
A process as claimed in claim 1, wherein an exhaust dyeing process is used and the amount of active solvent is from 1 to 2 parts by weight per part by weight of fibre.
Claim 10
Dependent Claim
26 words
A process as claimed in claim 8, wherein the amount of water is from 5 to 20 parts by weight per part by weight of fibre.
Claim 11
Dependent Claim
33 words
A process as claimed in claim 1, wherein the dye is fixed by raising the temperature rapidly to the boil and maintaining at the boil for a period of 2 to 10 minutes.
Claim 12
Dependent Claim
36 words
A process as claimed in claim 1, wherein a continuous dyeing process is carried out and the amount of active solvent is from 25 to 200 parts by weight per 100 parts by weight of fabric.
Claim 13
Dependent Claim
27 words
A process as claimed in claim 1, wherein the amount of water is from 50 to 250 parts by weight per 100 parts by weight of fabric.
Claim 14
Dependent Claim
17 words
A process as claimed in claim 1, wherein the dye is fixed by steaming for 10 minutes.
Claim 15
Dependent Claim
40 words
A process as claimed in claim 1, wherein after fixation the active solvent is removed by rinsing in a volatile solvent which is a solvent for the active solvent, at a temperature which does not substantially dissolve the fixed dye.
Claim 16
Dependent Claim
13 words
A process as claimed in claim 14, wherein the volatile solvent is perchloroethylene.
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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) | 1985-09-06 | 1986-03-08 | 1986-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-06 | 1990-03-08 | 1990-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-06 | 1994-03-08 | 1994-09-07 | $7700.00 | Window Closed / Lapsed |