Patent US4383835A successfully refreshed from Google Patents.
US4383835A
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Process for improving the light fastness of polyamide dyeings with copper complexes of schiff bases or ortho-hydroxy benzophenone
Assignee: Bayer AG
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Filing: 1981-10-15
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Granted: 1983-05-17
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Expires: 2001-10-15
Abstract
Abstract The light fastness of polyamide dyeings can be improved by treating polyamide fibre materials, before, during or after dyeing, with copper complexes of the reaction products of salicylaldehydes with amines (for example cyclohexylamine), or with copper complexes of o-hydroxybenzophenones.
Inventors
- 👤 Reinhard Preuss
- 👤 Joachim Grutze
- 👤 Ulrich Beck
- 👤 Hellmuth Pantke
- 👤 Karl Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:26
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/50; D06M13/503; D06M11/00; D06M11/58; D06M11/63; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/642; D06P1/6423; D06P1/651; D06P1/65106; D06P1/65112; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/241; D06P5/00; D06P5/02; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
57 words
Process for improving the light fastness of polyamide dyeings, characterised in that polyamide fibre materials are treated, before, during or after dyeings with a metal complex dyestuff or an acid dyestuff with copper complexes of the reaction products of optionally substituted salicylaldehydes with alkylamines, aromatic diamines or hydrazine (I), and/or copper complexes of optionally substituted o-hydroxybenzophenones (II).
Claim 2
Dependent Claim
57 words
Process for improving the light fastness of polyamide dyeings, characterised in that polyamide fibre materials are treated, before, during or after dyeings with a metal complex dyestuff or an acid dyestuff with copper complexes of the reaction products of optionally substituted salicylaldehydes with alkylamines, aromatic diamines or hydrazine (I), and/or copper complexes of optionally substituted o-hydroxybenzophenones (II).
Claim 3
Dependent Claim
16 words
Process according to claim 1, characterised in that the copper complexes are added to the dyebath.
Claim 4
Dependent Claim
20 words
Process according to claim 1, characterised in that 0.05-2%, relative to the fibre weight, of the copper complexes are employed.
Claim 5
Dependent Claim
27 words
Process according to claim 1, characterised in that the copper complexes employed are those of the formula wherein R denotes C 1 -C 18 -alkyl or cycloalkyl.
Claim 6
Dependent Claim
26 words
Process according to claim 1, characterised in that the copper complexes employed are those of the formulae ##STR16## wherein Ar denotes optionally substituted 1,4-phenylene or 1,2-phenylene.
Claim 7
Dependent Claim
37 words
Process according to claim 1, characterised in that the copper complexes employed are those of the formula ##STR17## wherein R denotes C 1 -C 18 -alkyl or cycloalkyl and the rings A can optionally carry further substituents.
Claim 8
Dependent Claim
17 words
Process according to claim 1, characterised in that the copper complexes are employed in combination with 2-(2'-hydroxyphenyl)-benzotriazoles.
References Cited (Backward Citations)
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-16 | 1986-11-15 | 1987-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-16 | 1990-11-15 | 1991-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-16 | 1994-11-15 | 1995-05-17 | $7700.00 | Window Closed / Lapsed |