US4045425A
Expired / Lapsed
US
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Crystalline azopyrazolone acid dye
Assignee: EIDP Inc
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Filing: 1976-02-19
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Granted: 1977-08-30
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Expires: 1996-02-19
Abstract
Abstract Crystalline, azopyrazolone acid dye and the preparation thereof, which dye is useful for dyeing textile materials using conventional, aqueous acid-dyeing techniques and is of the formula ##STR1## WHEREIN R is H or CH 3 , x is 1 or 2, y and z are each 0 or 1, the sum of y and z is 1 and M is lithium, sodium or potassium cation, said crystalline dye being characterized by the absence of absorption in the 6.0 micron region of its infrared scan.
Inventors
- 👤 Frank Ray Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:23
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3647; C09B29/3652; C09B29/366; C09B67/00; C09B67/0071; C09B67/0072
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
64 words
Crystalline, azopyrazolone acid dye of the formula wherein R is H or CH 3 , x is 1 or 2, y and z are each 0 or 1, the sum of y and z is 1 and M is ammonium, lithium, sodium or potassium cation, said crystalline dye being characterized by the absence of absorption in the 6.0 micron region of its infrared scan.
Claim 2
Dependent Claim
64 words
Crystalline, azopyrazolone acid dye of the formula wherein R is H or CH 3 , x is 1 or 2, y and z are each 0 or 1, the sum of y and z is 1 and M is ammonium, lithium, sodium or potassium cation, said crystalline dye being characterized by the absence of absorption in the 6.0 micron region of its infrared scan.
Claim 3
Dependent Claim
8 words
Dye of claim 1 of the formula ##STR6##
Claim 4
Dependent Claim
8 words
Dye of claim 1 of the formula ##STR7##
Claim 5
Dependent Claim
170 words
Process for preparing the crystalline, azopyrazolone acid dye of the formula ##STR8## wherein R is H or CH 3 , x is 1 or 2, y and z are each 0 or 1, the sum of y and z is 1 and M is ammonium, lithium, sodium or potassium cation, said crystalline dye being characterized by the absence of absorption in the 6.0 micron region of its infrared scan, which process consists of heating the dye which, in enol form, is of the formula ##STR9## wherein R, x, y and z are as defined above and M' is a cation, said dye being characterized by absorption in the 6.0 micron region of its infrared scan (using a mineral oil dispersant), in an aqueous liquid medium, at a pH above 10.0, at a temperature of 35° C. to the boiling point of the aqueous liquid medium, in the presence of at least two equivalents of the cation M per equivalent of dye, with 0-1 equivalent of M being provided by M'.
Claim 6
Dependent Claim
170 words
Process for preparing the crystalline, azopyrazolone acid dye of the formula ##STR8## wherein R is H or CH 3 , x is 1 or 2, y and z are each 0 or 1, the sum of y and z is 1 and M is ammonium, lithium, sodium or potassium cation, said crystalline dye being characterized by the absence of absorption in the 6.0 micron region of its infrared scan, which process consists of heating the dye which, in enol form, is of the formula ##STR9## wherein R, x, y and z are as defined above and M' is a cation, said dye being characterized by absorption in the 6.0 micron region of its infrared scan (using a mineral oil dispersant), in an aqueous liquid medium, at a pH above 10.0, at a temperature of 35° C. to the boiling point of the aqueous liquid medium, in the presence of at least two equivalents of the cation M per equivalent of dye, with 0-1 equivalent of M being provided by M'.
Claim 7
Dependent Claim
17 words
Process of claim 4 wherein the pH is at least 10.5 and the temperature is 50°-60° C.
Claim 8
Dependent Claim
9 words
Process of claim 4 wherein M is Na cation.
Claim 9
Dependent Claim
24 words
Process of claim 4 wherein the aqueous liquid medium contains up to 10 grams per 100 cc of medium of a salting out agent.
Claim 10
Dependent Claim
10 words
Process of claim 7 wherein the agent is sodium chloride.
Claim 11
Dependent Claim
19 words
Process of claim 4 wherein the aqueous liquid medium contains up to 50 weight percent of a water-soluble alcohol.
Claim 12
Dependent Claim
9 words
Process of claim 9 wherein the alcohol is methanol.
Claim 13
Dependent Claim
14 words
Process of claim 4 wherein the dye being prepared is of the formula ##STR10##
Claim 14
Dependent Claim
14 words
Process of claim 4 wherein the dye being prepared is of the formula ##STR11##
References Cited (Backward Citations)
CA563332A
Cited
US3563685A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |