US4257770A
Expired / Lapsed
US
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Disazo dye composition
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1979-07-16
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Granted: 1981-03-24
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Expires: 1999-07-16
Abstract
Abstract A dye composition comprising at least one disazo dye of the formula (I) expressed in the form of a free acid, <IMAGE> (I) wherein each X1 and X2 is -SO2CH2CH2OCOCH3, -SO2CH2CH2OSO3H or -SO2CH=CH2, provided that at least one of X1 and X2 is -SO2CH2CH2OCOCH3, and at least one disazo dye of the formula (II) expressed in the form of a free acid, <IMAGE> (II) Wherein each Y1 and Y2 is -SO2CH2CH2OSO3H, -SO2CH=CH2 or -SO2CH2CH2OH, provided that one of Y1 and Y2 is -SO2CH2CH2OSO3H or -SO2CH= CH2, is produced by diazotizing a mixture of 4-aminophenyl- beta -sulfatoethylsulfone and 4-aminophenyl- beta acetoxyethylsulfone in a weight ratio of 30 to 70: 70 to 30 with a nitrite, and coupling the resulting mixture of the diazonium salts with 1-amino-8-naphthol-3,6-disulfonic acid. The dye composition is suitable for dyeing natural or regenerated cellulosic fiber materials in black.
Inventors
- 👤 Nobuzi Nishimura
- 👤 Masayuki Tsuji
- 👤 Seizo Konishi
- 👤 Tadashi Yamamoto
- 👤 Takemi Tokieda
- 👤 Utazi Sawa
- 👤 Suketsugu Koumura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:02
CPC Classifications
C; C09; C09B; C09B33/00; C09B33/02; C09B33/08; C09B33/10; C09B62/00; C09B62/44; C09B62/503; C09B62/507; C09B62/513; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/918
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
148 words
A dye composition comprising at least one disazo dye of the formula (I) expressed in the form of a free acid, ##STR7## wherein each X 1 and X 2 is --SO 2 CH 2 CH 2 OCOCH 3 , --SO 2 CH 2 CH 2 OSO 3 H or --SO 2 CH═CH 2 , provided that at least one of X 1 and X 2 is --SO 2 CH 2 CH 2 OCOCH 3 , and at least one disazo dye of the formula (II) expressed in the form of a free acid, ##STR8## wherein each Y 1 and Y 2 is --SO 2 CH 2 CH 2 OSO 3 H, --SO 2 CH═CH 2 or --SO 2 CH 2 CH 2 OH, provided that one of Y 1 and Y 2 is --SO 2 CH 2 CH 2 OSO 3 H or --SO 2 CH═CH 2 .
Claim 2
Dependent Claim
148 words
A dye composition comprising at least one disazo dye of the formula (I) expressed in the form of a free acid, ##STR7## wherein each X 1 and X 2 is --SO 2 CH 2 CH 2 OCOCH 3 , --SO 2 CH 2 CH 2 OSO 3 H or --SO 2 CH═CH 2 , provided that at least one of X 1 and X 2 is --SO 2 CH 2 CH 2 OCOCH 3 , and at least one disazo dye of the formula (II) expressed in the form of a free acid, ##STR8## wherein each Y 1 and Y 2 is --SO 2 CH 2 CH 2 OSO 3 H, --SO 2 CH═CH 2 or --SO 2 CH 2 CH 2 OH, provided that one of Y 1 and Y 2 is --SO 2 CH 2 CH 2 OSO 3 H or --SO 2 CH═CH 2 .
Claim 3
Dependent Claim
29 words
A dye composition according to claim 1, wherein the content of each dye of the formula (I) or (II) in the dye composition is 20 to 80% by weight.
Claim 4
Dependent Claim
43 words
A process for producing the dye composition of claim 1, which comprises diazotizing a mixture of 4-aminophenyl-β-sulfatoethylsulfone and 4-aminophenyl-β-acetoxyethylsulfone in a weight ratio of 30 to 70:70 to 30 with a nitrite, and coupling the resulting mixture of diazonium salts with 1-amino-8-naphthol-3,6-disulfonic acid.
Claim 5
Dependent Claim
45 words
A process according to claim 3, wherein the mixture of 4-aminophenyl-β-sulfatoethylsulfone and 4-aminophenyl-β-acetoxyethylsulfone is prepared by heating 4-acetylaminophenyl-β-hydroxyethylsulfone at a temperature of 80° to 130° C. with a concentrated sulfuric acid, the amount of sulfuric acid being 2.4 to 3.8 moles per mole of 4-acetylaminophenyl-β-hydroxyethylsulfone.
Claim 6
Dependent Claim
18 words
A process according to claim 4, wherein the concentrated sulfuric acid is a 90 to 102% sulfuric acid.
Claim 7
Dependent Claim
20 words
A process according to claim 4, wherein the content of 4-aminophenyl-β-acetoxyethylsulfone in the mixture is 30 to 70% by weight.
Claim 8
Dependent Claim
19 words
A process according to claim 3, wherein the diazotizing is effected at a low temperature in an acid medium.
Claim 9
Dependent Claim
23 words
A process according to claim 3, wherein the coupling is effected at a temperature of -10° to 40° C. in an aqueous medium.
Claim 10
Dependent Claim
24 words
A process according to claim 3, wherein the molar ratio of 1-amino-8-naphthol-3,6-disulfonic acid to the mixture of the diazonium salts is 0.45 to 0.55.
Claim 11
Dependent Claim
10 words
A dye composition obtained by a process of claim 3.
Claim 12
Dependent Claim
19 words
A process for dyeing a natural or regenerated cellulosic fiber, which comprises using a dye composition of claim 1.
Claim 13
Dependent Claim
13 words
A natural or regenerated cellulosic fiber dyed by a process of claim 11.
References Cited (Backward Citations)
US3114754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |