Claims
- 1. Dyestuff which contains sulfonic acid groups and has the following formula: ##SPC45##
- wherein
- R.sub.1 and R.sub.2 are alkyl of 1-3 carbon atoms or substituted alkyl of 1-3 carbon atoms where the substituent is hydroxy or sulphato;
- R.sub.4 is hydrogen or sulfonic acid; and
- B is alkyl of 1-6 carbon atoms, allyl, hydroxyethyl, methoxyethyl, aminoethyl, methylaminoethyl, w-carboxypropyl, cyanoethyl, sulphatoethyl, cyclohexyl, hydroxycyclohexyl, 4-methoxycyclohexyl, 3-methylcyclohexyl, 4-methylcyclohexyl, or 4-aminocyclohexyl; and B must contain sulfonic acid group when R.sub.4 is hydrogen.
- 2. Dyestuff of claim 1 of the formula ##SPC46##
Priority Claims (1)
Number |
Date |
Country |
Kind |
1932647 |
Jun 1969 |
DT |
|
Parent Case Info
This is a continuation of application Ser. No. 407,784, filed Oct. 19, 1973, which in turn is a division of Ser. No. 49,156 filed June 23, 1970, now U.S. Pat. No. 3,823,168.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
812684 |
Schmidt |
Feb 1906 |
|
2337566 |
McNally et al. |
Dec 1943 |
|
3691209 |
Greenhalgh |
Sep 1972 |
|
3862967 |
Hohmann et al. |
Jan 1975 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
49156 |
Jun 1970 |
|
Continuations (1)
|
Number |
Date |
Country |
Parent |
407784 |
Oct 1973 |
|