US4082502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the dyeing of synthetic or natural fibers
Assignee: Hoechst AG
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Filing: 1976-08-26
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Granted: 1978-04-04
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Expires: 1996-08-26
Abstract
Abstract Process for the exhaust dyeing of wound bodies of synthetic or natural fiber materials with appropriate dyestuffs, by heating the wound-up textile articles to temperatures ranging at or above 100° C while replacing the air in the dyeing vessel by saturated or superheated steam, and by preparing the dye bath in the batch vessel which is connected by pipes with the dyeing vessel, and heating up the dyebath to temperatures also ranging at or above 100° C. A special control of the temperature and of the steam pressure in both closed systems is provided to secure the formation of a relative excess pressure of 2.94 to 9.8 bars in the batch vessel or such an excess pressure is produced from the outside. The hot dyebath is pressed by the differential pressure over a period of 3 to 60 seconds at the same time from inside and outside into the dry or wet wound bodies.
Inventors
- 👤 Hans-Ulrich von der Eltz
- 👤 Albert Reuther
- 👤 Hans-Joachim Wassmuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:16
CPC Classifications
D; D06; D06P; D06P5/00; D06P5/20; D06P5/2044; D06P5/205; D06B; D06B21/00; D06B21/02; D06B5/00; D06B5/12; D06B5/16; D06P3/00; D06P3/34; D06P3/38; D06P3/52; D06P3/54; D06P3/82; D06P3/8204; D06P3/8223; D06P3/8238; D06P5/2066; D06P5/2072
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
201 words
In a process for the dyeing of textile materials in the form of wound bodies according to the exhaust method at temperatures ranging at or above 100° C, in which process the wound bodies contained in a pressure-tight dyeing vessel are heated as well as deaerated before the actual dyeing operation and subsequently contacted with the dyeing liquor which has been separately heated to about dyeing temperature in a pressure-tight batch vessel, placed under a relative excess pressure of from 2.94 to 9.81 bars and then transferred in its total amount from said batch vessel into said dyeing vessel, and in which the dyeing operation is completed by circulation of the dyeing liquor, the improvement which comprises: exposing the wound bodies to an atmosphere of steam at about dyeing temperature prior to contact with the dyeing liquor in order to preheat and de-aerate said textile materials; and transferring the dyeing liquor by means of said relative excess pressure and towards the pressure of the air-free atmosphere of the steam into the dyeing vessel, simultaneously from both the inside and the outside of said wound bodies, thereby entirely condensing the steam in said vessel and filling it completely by the transferred liquor.
Claim 2
Dependent Claim
201 words
In a process for the dyeing of textile materials in the form of wound bodies according to the exhaust method at temperatures ranging at or above 100° C, in which process the wound bodies contained in a pressure-tight dyeing vessel are heated as well as deaerated before the actual dyeing operation and subsequently contacted with the dyeing liquor which has been separately heated to about dyeing temperature in a pressure-tight batch vessel, placed under a relative excess pressure of from 2.94 to 9.81 bars and then transferred in its total amount from said batch vessel into said dyeing vessel, and in which the dyeing operation is completed by circulation of the dyeing liquor, the improvement which comprises: exposing the wound bodies to an atmosphere of steam at about dyeing temperature prior to contact with the dyeing liquor in order to preheat and de-aerate said textile materials; and transferring the dyeing liquor by means of said relative excess pressure and towards the pressure of the air-free atmosphere of the steam into the dyeing vessel, simultaneously from both the inside and the outside of said wound bodies, thereby entirely condensing the steam in said vessel and filling it completely by the transferred liquor.
Claim 3
Dependent Claim
30 words
A process as claimed in claim 1, wherein the relative excess pressure for transferring the dyeing liquor from the batch vessel into the dyeing vessel is produced by compressed air.
Claim 4
Dependent Claim
38 words
A process as claimed in claim 1, wherein textile materials made from synthetic fibers or from mixtures which contain such fibers are dyed with water-insoluble disperse dyestuffs at temperatures in the range of from 110° to 145° C.
Claim 5
Dependent Claim
17 words
A process as claimed in claim 3, wherein polyamide or polyester fibers are used as synthetic fibers.
Claim 6
Dependent Claim
74 words
A process as claimed in claim 1, wherein textile materials made from synthetic fibers or from mixtures which contain synthetic fibers are dyed with primary components that are used for the preparation of water-insoluble developing black dyestuffs at temperatures in the range of from 105° to 135° C and said dyestuffs are developed by methods based on the diazo and oxidation dyeing technique under the above-mentioned pressure and temperature conditions using a second liquor.
Claim 7
Dependent Claim
17 words
A process as claimed in claim 5, wherein polyester or triacetate fibers are used as synthetic fibers.
Claim 8
Dependent Claim
47 words
A process as claimed in claim 1, wherein textile materials made from synthetic fibers which are dyeable with ionic dyestuffs or from mixtures which contain such synthetic fibers are dyed with water-soluble cationic or anionic dyestuffs at temperatures in the range of from 100° to 120° C.
Claim 9
Dependent Claim
34 words
A process as claimed in claim 7, wherein polyamide, polyurethane, basic modified polyester or polyolefin fibers, which can be dyed with anionic acid, chromium, metal complex and reactive dyestuffs, are used as synthetic fibers.
Claim 10
Dependent Claim
28 words
A process as claimed in claim 7, wherein polyacrylonitrile or acid modified polyester or polyolefin fibers, which can be dyed with cationic dyestuffs, are used as synthetic fibers.
Claim 11
Dependent Claim
35 words
A process as claimed in claim 1, wherein textile materials made from wool or from mixtures which contain wool are dyed with anionic dyestuffs at temperatures in the range of from 100° to 110° C.
Claim 12
Dependent Claim
20 words
A process as claimed in claim 10, wherein acid, chromium, metal complex and reactive dyestuffs are used as anionic dyestuffs.
Claim 13
Dependent Claim
45 words
A process as claimed in claim 1, wherein textile materials made from cellulosic fibers or from mixtures which contain such cellulosic fibers are dyed with soluble dyestuffs or with solubilized vat or sulfur dyestuffs at temperatures in the range of from 100° to 135° C.
Claim 14
Dependent Claim
24 words
A process as claimed in claim 12, wherein cellulose fibers and their mixtures with synthetic fibers are used as the material to be dyed.
Claim 15
Dependent Claim
35 words
A process as claimed in claim 12, wherein vat dyestuffs, sulfur vat dyestuffs, sulfur dyestuffs, soluble sulfur dyestuffs, leuco vat ester dyestuffs, reactive dyestuffs and direct dyestuffs are used as dyestuffs for the cellulose fibers.
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) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |