Patent US4544372A successfully refreshed from Google Patents.
US4544372A
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Process for improving the light fastness of polyamide dyeings
Assignee: Dohmen M GmbH
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Filing: 1983-12-02
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Granted: 1985-10-01
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Expires: 2003-12-02
Abstract
Abstract The light fastness of dyed polyamide fibre materials, in particular of the type used for manufacturing car seat covers, can be substantially improved by treating these materials, before, during or after the dyeing, with copper compounds of the compounds of the formula ##STR1## wherein R=H, OH, alkyl or cycloalkyl. The compounds (I) are distinguished by low self-colour and good stability to acid conditions.
Inventors
- 👤 Klaus-Peter Heise
- 👤 Robert Kuth
- 👤 Karl Neufang
- 👤 Hellmuth Pantke
- 👤 Karlfried Wedemeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:34
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/152; D06M13/322; D06M13/376; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/642; D06P1/6423; D06P5/00; D06P5/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
57 words
In the improvement of the lightfastness of a dyed polyamide textile material by applying to the textile material before, during or after dyeing a fastness improver, the improvement wherein such fastness improver consists essentially of a copper complex of an optionally ring substituted compound of the formula ##STR7## in which R is H, OH, alkyl or cycloalkyl.
Claim 2
Dependent Claim
57 words
In the improvement of the lightfastness of a dyed polyamide textile material by applying to the textile material before, during or after dyeing a fastness improver, the improvement wherein such fastness improver consists essentially of a copper complex of an optionally ring substituted compound of the formula ##STR7## in which R is H, OH, alkyl or cycloalkyl.
Claim 3
Dependent Claim
20 words
A process according to claim 1, wherein the copper complex is employed in 0.01 to 2% by weight of fiber.
Claim 4
Dependent Claim
10 words
A process according to claim 1, wherein R is H.
Claim 5
Dependent Claim
10 words
A process according to claim 1, wherein R is OH.
Claim 6
Dependent Claim
15 words
A process according to claim 1, wherein the copper complex is present in the dyebath.
Claim 7
Dependent Claim
22 words
A process according to claim 1, wherein the copper complex is produced in situ on the fiber from the corresponding starting materials.
Claim 8
Dependent Claim
16 words
A process according to claim 1, wherein the polyamide is dyed with a metal complex dyestuff.
Claim 9
Dependent Claim
11 words
A process according to claim 1, wherein the polymide is nylon.
References Cited (Backward Citations)
GB799742A
Cited
US3203752A
Cited
GB1321645A
Cited
EP0018775A1
Cited
DE3041153A1
Cited
US4383835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-30 | 1989-04-01 | 1989-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-30 | 1993-04-01 | 1993-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-30 | 1997-04-01 | 1997-10-01 | $7700.00 | Window Closed / Lapsed |