US4831068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving the photochemical stability of dyeings on polyester fibre materials
Assignee: Huntsman International LLC
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Filing: 1988-02-17
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Granted: 1989-05-16
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Expires: 2008-02-17
Abstract
Abstract A process is described for improving the photochemical stability of dyeings on polyester fibre materials by means of UV absorbers of the formula ##STR1## in which R is lower alkyl, lower alkoxy, halogen or hydroxyl, R 1 and R 2 independently of one another alkyl which is substituted by hydroxyl, lower alkoxy, lower alkylthio, amino, monoalkylamino or dialkylamino, phenyl, phenyl which is substituted by chlorine, lower alkyl or lower alkoxy, or o-hydroxyphenyl, and n is 0, 1 or 2.
Inventors
- 👤 Gerhard Reinert
- 👤 Kurt Burdeska
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:53
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/31; D06P; D06P3/00; D06P3/34; D06P3/52; D06P3/54; D06P1/00; D06P1/44; D06P1/64; D06P1/642; D06P1/6426
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
88 words
A process for improving the photochemical stability of dyeings on polyester fibre materials by means of UV absorbers, which comprises treating the fibre material with a compound of the formula ##STR5## in which R is lower alkyl, lower alkoxy, halogen or hydroxyl, R 1 and R 2 independently of one another are alkyl, alkyl which is substituted by hydroxyl, lower alkoxy, lower alkylthio, amino, monoalkylamino or dialkylamino, phenyl, phenyl which is substituted by chlorine, lower alkyl or lower alkoxy, or o-hydroxyphenyl, and n is 0, 1 or 2.
Claim 2
Dependent Claim
88 words
A process for improving the photochemical stability of dyeings on polyester fibre materials by means of UV absorbers, which comprises treating the fibre material with a compound of the formula ##STR5## in which R is lower alkyl, lower alkoxy, halogen or hydroxyl, R 1 and R 2 independently of one another are alkyl, alkyl which is substituted by hydroxyl, lower alkoxy, lower alkylthio, amino, monoalkylamino or dialkylamino, phenyl, phenyl which is substituted by chlorine, lower alkyl or lower alkoxy, or o-hydroxyphenyl, and n is 0, 1 or 2.
Claim 3
Dependent Claim
54 words
A process according to claim 1, wherein a compound of the formula ##STR6## in which R is as defined in claim 1 and R 3 and R 4 independently of one another are alkyl having 1 to 4 C atoms, phenyl or phenyl which is substituted by lower alkyl or lower alkoxy, is used.
Claim 4
Dependent Claim
45 words
A process according to claim 1, wherein a compound of the formula ##STR7## in which R 5 is lower alkyl or lower alkoxy and R 6 and R 7 independently of one another are alkyl having 1 to 4 C atoms or phenyl, is used.
Claim 5
Dependent Claim
31 words
A process according to claim 1, wherein the compound to be employed of the formula (1) is used in an amount of 0.5 to 7.5% by weight of the fibre material.
Claim 6
Dependent Claim
19 words
A process according to claim 1, wherein the compound of the formula (1) is added directly to the dyebath.
Claim 7
Dependent Claim
12 words
The polyester fibre material treated by the process according to claim 1.
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) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |