US6814763B2
Expired / Lapsed
US
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Mediator systems based on mixed metal complexes, used for reducing dyes
Assignee: Dystar Colours Distribution GmbH
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Filing: 2001-03-01
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Granted: 2004-11-09
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Expires: 2021-03-01
Abstract
Abstract Mediator systems obtainable by mixing one or more salts of a metal capable of forming a plurality of valence states with at least one amino-containing complexing agent (K1) and at least one hydroxyl-containing but amino-devoid complexing agent (K2) in an alkaline aqueous medium, wherefor the complexing agents may be present as salts and the molar ratio of K1 to metal ion is from 0.1:1 to 10:1 and the molar ratio of K2 to metal ion is from 0.1:1 to 5:1 are useful for dyeing cellulosic textile material.
Inventors
- 👤 Thomas Bechtold
- 👤 Stefan Mohr
- 👤 Wolfgang Schrott
- 👤 Norbert Grund
- 👤 Wolfgang Hiebsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:01
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/673; D06P1/67333; D06P1/6735; D06P1/22; D06P1/221; D06P1/228; D06P1/30; D06P1/64; D06P1/642; D06P1/645; D06P1/651; D06P1/65106; D06P1/65118; D06P1/67341; D06P5/00; D06P5/20; D06P5/2016; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/918
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
80 words
Mediator systems obtainable by mixing one or more salts of a metal capable of forming a plurality of valence states with at least one amino-containing complexing agent (K1) and at least one hydroxyl-containing but amino-devoid complexing agent (K2) in an alkaline aqueous medium, wherefor the complexing agents may be present as salts and the molar ratio of K1 to metal ion is from 0.1:1 to 10:1 and the molar ratio of K2 to metal ion is from 0.1:1 to 5:1.
Claim 2
Dependent Claim
80 words
Mediator systems obtainable by mixing one or more salts of a metal capable of forming a plurality of valence states with at least one amino-containing complexing agent (K1) and at least one hydroxyl-containing but amino-devoid complexing agent (K2) in an alkaline aqueous medium, wherefor the complexing agents may be present as salts and the molar ratio of K1 to metal ion is from 0.1:1 to 10:1 and the molar ratio of K2 to metal ion is from 0.1:1 to 5:1.
Claim 3
Dependent Claim
14 words
Mediator systems as claimed in claim 1 , containing iron(II) ions and/or iron(III) ions.
Claim 4
Dependent Claim
31 words
The mediator systems as claimed in claim 1 , wherein said complexing agent K1 is an aliphatic amino compound containing at least two coordination-capable groups containing at least one hydroxyl group.
Claim 5
Dependent Claim
17 words
The mediator systems as claimed in claim 1 , wherein said complexing agent K1 is an alcoholamine.
Claim 6
Dependent Claim
39 words
The mediator systems as claimed in claim 1 , wherein said complexing agent K2 is an aliphatic hydroxy compound containing at least two coordination-capable groups which optionally contains a plurality of hydroxyl groups and/or aldehyde, keto and/or carboxyl groups.
Claim 7
Dependent Claim
20 words
The mediator systems as claimed in claim 1 , wherein said complexing agent K2 is a hydroxyl-containing aliphatic carboxylic acid.
Claim 8
Dependent Claim
34 words
The mediator systems as claimed in claim 1 , wherein the metal ions are iron (II/III) ions, said complexing agent K1 is triethanolamine and said complexing agent K2 is gluconic acid and/or heptagluconic acid.
Claim 9
Dependent Claim
29 words
A process for electrochemical reduction of dyes in an alkaline aqueous medium using metal complexes as mediators, which comprises using a mediator system as claimed in claim 1 .
Claim 10
Dependent Claim
17 words
The process as claimed in claim 8 , wherein said dyes are vat dyes or sulfur dyes.
Claim 11
Dependent Claim
32 words
The process for dyeing cellulosic textile material with vat dyes or sulfur dyes which comprises an electrochemical dye reduction in the presence of the mediator system as claimed in claim 1 .
Claim 12
Dependent Claim
38 words
The process as claimed in claim 10 , wherein the dye is added to the dyebath in prereduced form and the dye fraction reoxidized during dyeing by air contact is electrochemically reduced by means of the mediator system.
Claim 13
Dependent Claim
11 words
Cellulosic textile materials dyed by the process of claim 10 .
Claim 14
Dependent Claim
31 words
The mediator systems as claimed in claim 2 , wherein said complexing agent K1 is an aliphatic amino compound containing at least two coordination-capable groups containing at least one hydroxyl group.
Claim 15
Dependent Claim
17 words
The mediator systems as claimed in claim 13 , wherein said complexing agent K1 is an alcoholamine.
Claim 16
Dependent Claim
39 words
The mediator systems as claimed in claim 13 , wherein said complexing agent K2 is an aliphatic hydroxy compound containing at least two coordination-capable groups which optionally contains a plurality of hydroxyl groups and/or aldehyde, keto and/or carboxyl groups.
Claim 17
Dependent Claim
20 words
The mediator systems as claimed in claim 14 , wherein said complexing agent K2 is a hydroxyl-containing aliphatic carboxylic acid.
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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) | 2007-11-09 | 2008-05-10 | 2008-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-11-09 | 2012-05-10 | 2012-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-11-09 | 2016-05-10 | 2016-11-09 | $7700.00 | Window Closed / Lapsed |