US4213899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactive dyestuffs containing chlorine or fluorine substituents and one or more pyridine radicals linked to the dyestuff at the 2-, 4- or 6-position
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1978-03-13
•
Granted: 1980-07-22
•
Expires: 1998-03-13
Abstract
Abstract A dyestuff of the formula <IMAGE> where D is a chromophoric residue n is 1 or 2 Z is <IMAGE> where R is H, C1-4alkyl, C1-4alkyl substituted by OH, OSO3H, CN or SO3H or is phenyl each hal independently represents a chlorine or fluorine atom occupying one of the remaining 2-, 4- and 6-positions of the pyridine nucleus X is F, Cl, CN or NO2 Y is H, F, Cl, CN or NO2. These dyestuffs reactively dye cellulose at low temperatures and are less prone to "acid bleeding" than some known reactive dyes.
Inventors
- 👤 Duncan A. S. Phillips
- 👤 Brian Anderson
- 👤 Neville Jackson
- 👤 Cecil V. Stead
- 👤 Alan T. Costello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:45
CPC Classifications
D; D06; D06P; D06P5/00; D06P5/003; D06P5/004; D06P5/006; C; C09; C09B; C09B62/00; C09B62/02; C09B62/36; D06P1/00; D06P1/38; D06P1/382
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
102 words
A dyestuff which is capable of reacting with cellulose at 40° C. in the presence of an acid binding agent to yield a colored product with resistance to acid bleeding, said dyestuff having the formula ##STR23## where D is a chromophoric group n is 1 or 2 z is ##STR24## where R is H, C 1-4 alkyl, C 1-4 alkyl substituted by OH, OSO 3 H, CN or SO 3 H or is phenyl each hal independently represents a chlorine or fluorine atom occupying one of the remaining 2-, 4- and 6-positions of the pyridine nucleus X is CN Y is Cl.
Claim 2
Dependent Claim
102 words
A dyestuff which is capable of reacting with cellulose at 40° C. in the presence of an acid binding agent to yield a colored product with resistance to acid bleeding, said dyestuff having the formula ##STR23## where D is a chromophoric group n is 1 or 2 z is ##STR24## where R is H, C 1-4 alkyl, C 1-4 alkyl substituted by OH, OSO 3 H, CN or SO 3 H or is phenyl each hal independently represents a chlorine or fluorine atom occupying one of the remaining 2-, 4- and 6-positions of the pyridine nucleus X is CN Y is Cl.
Claim 3
Dependent Claim
12 words
A dyestuff as claimed in claim 1 wherein both halogens are fluorine.
Claim 4
Dependent Claim
28 words
A dyestuff as claimed in claim 1 wherein the dyestuff contains sufficient SO 3 H groups to have a water solubility of at least 5 grams per liter.
Claim 5
Dependent Claim
18 words
A dyestuff as claimed in claim 1 wherein Z is linked to an aromatic carbon atom in D.
Claim 6
Dependent Claim
56 words
A dyestuff as claimed in claim 1 in which D is of the form D'--Q--W' where D' is a chromophoric group linked at an aromatic carbon atom, Q is a direct link or NR 3 CO where R 3 is H or C 1-4 alkyl, and W' is CH 2 or CH 2 CH 2 .
Claim 7
Dependent Claim
11 words
A dyestuff as claimed in claim 1 of the formula: ##STR25##
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) | 1983-07-22 | 1984-01-21 | 1984-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-22 | 1988-01-21 | 1988-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-22 | 1992-01-21 | 1992-07-22 | $7700.00 | Window Closed / Lapsed |