Patent US4165429A successfully refreshed from Google Patents.
US4370144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-phase organic solvent-water dyeing process for polyester fibers
Assignee: BASF Corp
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Filing: 1980-02-04
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Granted: 1983-01-25
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Expires: 2000-02-04
Abstract
Abstract A process of dyeing textile fibres in which the fibre is contacted with a two-phase suspension comprising an active solvent containing dissolved dye and the necessary amount of a bulking inert substantially immiscible solvent, the active solvent under the conditions of dyeing being liquid, is a solvent for the dye, is 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 the fixation, wherein the dye used is in the form of an aqueous, stable, highly concentrated, finely dispersed, flowable preparation insoluble to difficultly soluble in water containing at least 25% of finely dispersed dyestuff, at most 10% of an anion-active dispersing agent, at most 5% of a non-ionic dispersing agent and from 0 to 35% of a hydrotropic agent.
Inventors
- 👤 James K. Skelly
- 👤 David G. Evans
- 👤 Carl Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:11
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/90; C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0084; Y; Y10; Y10S; Y10S8/00; Y10S8/904; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
172 words
A process for dyeing polyester fibers comprising the steps of contacting the fibers with a two-phase system comprising (A) an organic solvent chosen from the group consisting of phenoxyethanol, phenxypropanol and benzyl alcohol and (B) water, in a weight ratio of about 1:25, said organic solvent containing a disperse dye dissolved therein, which dye is introduced into the two-phase system in the form of an aqueous, stable, highly concentrated, finely dispersed, flowable preparation having a low content of dispersing agent and a particle size of the dyestuff particles smaller than 10 microns, said preparation containing at least 10% by weight of water, at least 25% by weight of dyestuff, at most 10% by weight of an anionic dispersing agent, at most 5% by weight of a non-ionic dispersing agent and at most 35% by weight of a hydrotropic agent, at a temperature of about 100° C. and subsequently removing the organic phase from the system to fix the dye, the entire process being carried out at a temperature of about 100° C.
Claim 2
Dependent Claim
172 words
A process for dyeing polyester fibers comprising the steps of contacting the fibers with a two-phase system comprising (A) an organic solvent chosen from the group consisting of phenoxyethanol, phenxypropanol and benzyl alcohol and (B) water, in a weight ratio of about 1:25, said organic solvent containing a disperse dye dissolved therein, which dye is introduced into the two-phase system in the form of an aqueous, stable, highly concentrated, finely dispersed, flowable preparation having a low content of dispersing agent and a particle size of the dyestuff particles smaller than 10 microns, said preparation containing at least 10% by weight of water, at least 25% by weight of dyestuff, at most 10% by weight of an anionic dispersing agent, at most 5% by weight of a non-ionic dispersing agent and at most 35% by weight of a hydrotropic agent, at a temperature of about 100° C. and subsequently removing the organic phase from the system to fix the dye, the entire process being carried out at a temperature of about 100° C.
Claim 3
Dependent Claim
14 words
A process of claim 1, wherein the dyestuff particle size is smaller than 2μ.
Claim 4
Dependent Claim
18 words
A process of claim 1, wherein the dye preparation contains form 20 to 30% by weight of water.
Claim 5
Dependent Claim
18 words
A process of claim 1, wherein the dye preparation contains from 35 to 65% by weight of dyestuff.
Claim 6
Dependent Claim
18 words
A process of claim 1, wherein the dye preparation contains from 40 to 60% by weight of dyestuff.
Claim 7
Dependent Claim
21 words
A process of claim 1, wherein the dye preparation contains from 0.1 to 5% by weight of an anionic dispersing agent.
Claim 8
Dependent Claim
21 words
A process of claim 1, wherein the dye preparation contains from 0.5 to 5% by weight of a non-ionic dispersing agents.
Claim 9
Dependent Claim
21 words
A process of claim 1, wherein the dye preparation contains from 1 to 3% by weight of a non-ionic dispersing agent.
Claim 10
Dependent Claim
20 words
A process of claim 1, wherein the dye preparation contains from 5 to 20% by weight of a hydrotropic agent.
Claim 11
Dependent Claim
21 words
A process of claim 1, wherein the anionic dispersing agent is the condensation product of an aromatic sulphonic acid with formaldehyde.
Claim 12
Dependent Claim
20 words
A process of claim 1, wherein the anionic dispersing agent is the condensation product of formaldehyde and naphthalene sulphonic acid.
Claim 13
Dependent Claim
23 words
A process of claim 1, wherein the anionic dispersing agent is the condensation product of formaldehyde, naphthalene sulphonic acid and benzene sulphonic acid.
Claim 14
Dependent Claim
21 words
A process of claim 1, wherein the anionic dispersing agent is the condensation product of crude cresol, formaldehyde and naphthalene-sulphonic acid.
Claim 15
Dependent Claim
25 words
A process of claim 1, wherein the anionic dispersing agent is the condensation product of crude cresol, formaldehyde and naphthalene sulphonic acid with lignin sulphonate.
Claim 16
Dependent Claim
61 words
A process of claim 1, wherein the nonionic dispersing agent is an addition product of 5 to 50 moles of alkylene oxide with a higher fatty acid, or with a saturated or unsaturated alcohol, mercaptan or amine having 8 to 20 carbon atoms or with an alkyl phenol or alkylthiophenol of which the alkyl radical contains at least 7 carbon atoms.
Claim 17
Dependent Claim
36 words
A process of claim 1, wherein the nonionic dispersing agent is a reaction product of a higher-molecular fatty acid and a hydroxyalkylamine, at a molecular ratio of hydroxyalkyl amine to fatty acid is greater than 1.
Claim 18
Dependent Claim
21 words
A process of claim 1, wherein the nonionic dispersing agent is a reaction product of coconut oil fatty acid and diethanolamine.
Claim 19
Dependent Claim
17 words
A process of claim 1, wherein the nonionic dispersing agent is a condensation product of alkylene oxide.
Claim 20
Dependent Claim
43 words
A process of claim 1, wherein the nonionic dispersing agent is a copolymer of ethylene oxide and propylene oxide having the formula ##STR22## in which the sum of a and c is at least 150 and b is number between 20 and 100.
Claim 21
Dependent Claim
13 words
A process of claim 1, wherein the hydrotropic agent is urea or dimethylurea.
Claim 22
Dependent Claim
11 words
A process of claim 1, wherein the hydrotropic agent is N-methylacetamide.
Claim 23
Dependent Claim
12 words
The textile fibres dyed by the process as claimed in claim 1.
References Cited (Backward Citations)
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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) | 1986-01-24 | 1986-07-26 | 1987-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-24 | 1990-07-26 | 1991-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-24 | 1994-07-26 | 1995-01-25 | $7700.00 | Window Closed / Lapsed |