US4737240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trisazo black dyes from 2-(4'-aminophenylazo)-7-amino-1-naphthol-3-sulfonic acid
Assignee: Novartis Corp
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Filing: 1986-06-27
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Granted: 1988-04-12
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Expires: 2006-06-27
Abstract
Abstract Black trisazo dyes for cellulosic textiles, leather and especially paper having the structure ##STR1## where A is ##STR2## one of B 1 and B 2 is hydrogen and the other is --SO 3 M or a mixture thereof, and M is hydrogen, sodium, potassium, lithium or --HNR 1 R 2 R 3 wherein R 1 , R 2 and R 3 represent the same or different substituents selected from hydrogen, lower alkyl and lower hydroxyalkyl, and stable liquid concentrates of these dyes are described.
Inventors
- 👤 Herbert S. Davis
- 👤 Roy E. Smith
- 👤 Mortimer Weiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:01
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/28; C; C09; C09B; C09B35/00; C09B35/36; C09B35/362; C09B67/00; C09B67/0033; C09B67/0046; C09B67/0071; C09B67/0072; C09B67/0073; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/32; D06P3/3206; D06P3/3226; Y; Y10; Y10S; Y10S534/00; Y10S534/01
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
70 words
A compound of the formula where A is ##STR8## one of B 1 and B 2 is hydrogen and the other is --SO 3 M or a mixture thereof, and M is hydrogen, sodium, potassium, lithium or HNR 1 R 2 R 3 wherein R 1 , R 2 and R 3 represent the same or different substituents selected from the group consisting of hydrogen, lower alkyl and lower hydroxylalkyl.
Claim 2
Dependent Claim
70 words
A compound of the formula where A is ##STR8## one of B 1 and B 2 is hydrogen and the other is --SO 3 M or a mixture thereof, and M is hydrogen, sodium, potassium, lithium or HNR 1 R 2 R 3 wherein R 1 , R 2 and R 3 represent the same or different substituents selected from the group consisting of hydrogen, lower alkyl and lower hydroxylalkyl.
Claim 3
Dependent Claim
23 words
A compound of claim 1 wherein A is ##STR9## and M is hydrogen, sodium, lithium or --HNR 1 R 2 R 3 .
Claim 4
Dependent Claim
23 words
A compound of claim 1 where A is ##STR10## and M is hydrogen, sodium, lithium or --HNR 1 R 2 R 3 .
Claim 5
Dependent Claim
23 words
A compound of claim 1 wherein A is ##STR11## and M is hydrogen, sodium, lithium or HNR 1 R 2 R 3 .
Claim 6
Dependent Claim
10 words
A compound of claim 4, wherein B 1 is hydrogen.
Claim 7
Dependent Claim
10 words
A compound of claim 4, wherein B 2 is hydrogen.
Claim 8
Dependent Claim
73 words
A liquid colorant composition which consists essentially of water, 12-25% of a dye of the formula of claim 1 wherein M is hydrogen, and from 10-30% of an amine of the formula NR 1 R 2 R 3 wherein R 1 is hydrogen or lower alkanol, R 2 and R 3 are each lower alkanol, and the amount of amine is at least sufficient to neutralize all the acidic groups of the dye.
Claim 9
Dependent Claim
18 words
A liquid colorant composition of claim 7 wherein the amine is triethanolamine or diethanolamine or a mixture thereof.
Claim 10
Dependent Claim
17 words
A liquid colorant composition of claim 8 containing 12-25% of the dye and 10-30% of the amine.
Claim 11
Dependent Claim
38 words
A liquid colorant composition of claim 7 which further contains an effective amount of at least one of a humectant, an antifoaming agent, a wetting agent, an anti-sedimentation agent, a chelating agent, an anti-microbial and an anti-fungal agent.
Claim 12
Dependent Claim
45 words
A liquid colorant composition which consists essentially of water, 10-25% of a dye of the formula of claim 1 wherein M is hydrogen and sufficient lithium hydroxide to both neutralize all of the acidic groups of the dye and to effect solution of said dye.
Claim 13
Dependent Claim
72 words
A process for the preparation of a liquid colorant composition which consists essentially of the step of mixing a dye of the formula of claim 1 wherein M is hydrogen with water and an amine of the formula NR 1 R 2 R 3 wherein R 1 is hydrogen or lower alkanol and R 2 and R 3 are lower alkanol at 15° to 75° C. until a homogenous composition is obtained.
Claim 14
Dependent Claim
29 words
A method of dyeing paper which comprises the step of applying to paper fibers or wood pulp, from an aqueous solution, a dye of the formula of claim 1.
Claim 15
Dependent Claim
25 words
A method of dyeing leather which comprises the step of applying to leather, from an aqueous solution, a dye of the formula of claim 1.
Claim 16
Dependent Claim
18 words
Paper which has been dyed with an aqueous solution of a dye of the formula of claim 1.
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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) | 1991-04-12 | 1991-10-12 | 1992-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-12 | 1995-10-12 | 1996-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-12 | 1999-10-12 | 2000-04-12 | $7700.00 | Window Closed / Lapsed |