US5891199A
Expired / Lapsed
US
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Polymer dyestuffs and their use for dyeing fibres
Assignee: Henkel AG and Co KGaA
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Filing: 1996-03-13
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Granted: 1999-04-06
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Expires: 2016-03-13
Abstract
Abstract The proposal is for novel polymer dyestuffs obtained by condensing cationic biopolymers, e.g. chitosame, with dyestuffs which have a basic group, preferably a halogen function. The dyestuffs spread as a film on the fibers and can easily be washed out.
Inventors
- 👤 Rolf Wachter
- 👤 Joerg Kahre
- 👤 David Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:59
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/73; A61K8/736; A61Q; A61Q5/00; A61Q5/06; A61Q5/065; C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0024; C08B37/0027; C08B37/003; C09; C09B; C09B51/00; C09B69/00; C09B69/10; D; D06; D06P; D06P1/00; D06P1/0052; D06P5/00; D06P5/13; D06P5/138; A61K2800/00; A61K2800/40; A61K2800/57; D06P3/00; D06P3/02; D06P3/04; D06P3/047; D06P3/24; D06P3/246
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
15 words
A polymeric dye comprising a condensation product of a chitosan with a halogen-substituted nitroaniline compound.
Claim 2
Dependent Claim
15 words
A polymeric dye comprising a condensation product of a chitosan with a halogen-substituted nitroaniline compound.
Claim 3
Dependent Claim
60 words
A polymeric dye according to claim 1 wherein the nitroaniline compound is a halogen-substituted 2-nitroaniline or 4-nitroaniline, and substituted by an alkyl group having 1 to 4 carbon atoms and wherein the amino group of the nitroaniline is substituted by a group having 1 to 15 carbon atoms selected from the group consisting of alkyl, aminoalkyl, hydroxyalkyl, dihydroxyalkyl, and alkoxy.
Claim 4
Dependent Claim
46 words
A polymeric dye according to claim 1 wherein the nitroaniline compound is a halogen-substituted 2-nitroaniline or 4-nitroaniline, and substituted by an alkyl group having 1 to 4 carbon atoms and wherein the amino group of the nitroaniline forms part of a morph oline or piperidine ring.
Claim 5
Dependent Claim
33 words
A polymeric dye according to claim 2 wherein the halogen-substituted nitroaniline compound is selected from the group consisting of a halogen-substituted 2-chloro-4- a halogen-substituted nitroaniline, 3-fluoro-4-nitroaniline, 2-nitro-4-bromoaniline, 4-chloro-3-nitro-1-(N-2-hydroxyethylamino)-benzene, 4-fluoro-2-nitro-1-(N,N-bis-2 hydroxyethylamino)-benzene, 4-fluoro-3-nitroaniline, and 2-chloro-6-methyl-3-nitroaniline.
Claim 6
Dependent Claim
15 words
Formulations for the temporary coloring of fibers containing the polymeric dyes claimed in claim 1.
Claim 7
Dependent Claim
23 words
A process for the temporary coloring of keratin fibers, in which the fibers are dyed with the polymeric dyes claimed in claim 1.
Claim 8
Dependent Claim
24 words
A process for the temporary dyeing of synthetic textile fibers, in which the fibers are dyed with the polymeric dyes claimed in claim 1.
Claim 9
Dependent Claim
65 words
A process for preparing a polymeric dye comprising condensing in an organic solvent in the presence of a base a chitosan compound and a halogen-substituted ortho- or para-nitroaniline compound substituted by an alkyl group having 1 to 4 carbon atoms in a molar ratio of 1:1, wherein said molar ratio represents the ratio of moles of dye to moles of nitrogen groups in the chitosan.
Claim 10
Dependent Claim
65 words
A process for preparing a polymeric dye comprising condensing in an organic solvent in the presence of a base a chitosan compound and a halogen-substituted ortho- or para-nitroaniline compound substituted by an alkyl group having 1 to 4 carbon atoms in a molar ratio of 1:1, wherein said molar ratio represents the ratio of moles of dye to moles of nitrogen groups in the chitosan.
Claim 11
Dependent Claim
37 words
A process according to claim 8, wherein the amino group of the nitroaniline compound is substituted by a group having 1 to 15 carbon atoms selected from the group consisting of alkyl, aminoalkyl, hydroxyalkyl, dihydroxyalkyl, and alkoxy.
Claim 12
Dependent Claim
22 words
A process according to claim 8, wherein the amino group of the nitroaniline compound forms part of a morpholine or piperidine ring.
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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) | 2002-04-05 | 2002-10-05 | 2003-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-04-05 | 2006-10-05 | 2007-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-04-05 | 2010-10-05 | 2011-04-06 | $7700.00 | Window Closed / Lapsed |