Patent US3956271A successfully refreshed from Google Patents.
US3956271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of concentrated solutions of cationic azo dyes
Assignee: Sandoz AG
•
Filing: 1974-02-06
•
Granted: 1976-05-11
•
Expires: 1994-02-06
Abstract
Abstract Concentrated solutions of cationic azo dyes are prepared directly from sparingly soluble salts of the dye in a one-step reaction by reacting the sparingly soluble dye with a non-chromophoric carboxylate salt, the cation of which forms an insoluble or sparingly soluble salt with the anion of the starting cationic azo dye in the solvent system employed.
Inventors
- 👤 Ulrich Blass
- 👤 Roland Entschel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:34
CPC Classifications
C; C09; C09B; C09B44/00; C09B44/005; C09B44/02; C09B44/04; C09B67/00; C09B67/0071; C09B67/0075; C09B67/0076; C09B69/00; C09B69/02; C09B69/06
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
192 words
A process for the production of a concentrated liquid dye preparation of a cationic azo dye, said concentrated liquid dye preparation being suitable for direct application to textiles, comprising a. reacting in a solvent system an insoluble or sparingly soluble cationic azo dye of the formula F.sup.+ A.sub.1.sup.- with a non-chromophoric carboxylate salt of the formula M.sup.+ A.sup.- to obtain a concentrated solution of a soluble cationic azo dye of the formula F.sup.+ A.sup.- wherein F + is the cation of an insoluble or sparingly soluble cationic azo dye, A 1 - is the anion of an insoluble or sparingly soluble cationic azo dye, M + is a non-chromophoric cation, and A - is a non-chromophoric carboxylate anion, with the provisos that 1. the reactants and solvent system are chosen such that F + A - is more soluble in the solvent system than is F + A 1 - , 2. f + a - is soluble enough to form a concentrated solution in the solvent system, 3. M + A - and F + A 1 - are present in amounts sufficient for the preparation of a concentrated solution, and
Claim 2
Dependent Claim
192 words
A process for the production of a concentrated liquid dye preparation of a cationic azo dye, said concentrated liquid dye preparation being suitable for direct application to textiles, comprising a. reacting in a solvent system an insoluble or sparingly soluble cationic azo dye of the formula F.sup.+ A.sub.1.sup.- with a non-chromophoric carboxylate salt of the formula M.sup.+ A.sup.- to obtain a concentrated solution of a soluble cationic azo dye of the formula F.sup.+ A.sup.- wherein F + is the cation of an insoluble or sparingly soluble cationic azo dye, A 1 - is the anion of an insoluble or sparingly soluble cationic azo dye, M + is a non-chromophoric cation, and A - is a non-chromophoric carboxylate anion, with the provisos that 1. the reactants and solvent system are chosen such that F + A - is more soluble in the solvent system than is F + A 1 - , 2. f + a - is soluble enough to form a concentrated solution in the solvent system, 3. M + A - and F + A 1 - are present in amounts sufficient for the preparation of a concentrated solution, and
Claim 3
Dependent Claim
27 words
M + A - is soluble or partially soluble in the solvent system, and b. removing any precipitated salts, whereby a concentrated liquid dye preparation is obtained.
Claim 4
Dependent Claim
27 words
M + A - is soluble or partially soluble in the solvent system, and b. removing any precipitated salts, whereby a concentrated liquid dye preparation is obtained.
Claim 5
Dependent Claim
18 words
A process according to claim 1 wherein the concentrated liquid dye preparation has a dye concentration of 15-50%.
Claim 6
Dependent Claim
16 words
A process according to claim 2 wherein the cationic azo dye is a cationic monoazo dye.
Claim 7
Dependent Claim
198 words
A process for the preparation of a concentrated solution of a cationic azo dye comprising (a) reacting in a solvent system an insoluble or sparingly soluble cationic azo dye of the formula F.sup.+ A.sub.1 .sup.- with a non-chromophoric carboxylate salt of the formula M.sup.+ A.sup.- to obtain a concentrated solution of a soluble cationic dye of the formula F.sup.+ A.sup.- wherein F + is the cation of an insoluble or sparingly soluble cationic azo dye, A 1 - is the anion of an insoluble or sparingly soluble cationic azo dye, M + is a non-chromophoric cation, and A - is a non-chromophoric carboxylate anion, with the provisos that 1. the reactants and solvent system are chosen such that F + A - is more soluble in the solvent system than is F + A 1 - , 2. f + a - is soluble enough to form a concentrated solution in the solvent system, 3 M + A - and F + A 1 - are present in amounts sufficient for the preparation of a concentrated solution, and 4. M + A - is soluble or partially soluble in the solvent system, and b. removing any precipitated salts.
Claim 8
Dependent Claim
198 words
A process for the preparation of a concentrated solution of a cationic azo dye comprising (a) reacting in a solvent system an insoluble or sparingly soluble cationic azo dye of the formula F.sup.+ A.sub.1 .sup.- with a non-chromophoric carboxylate salt of the formula M.sup.+ A.sup.- to obtain a concentrated solution of a soluble cationic dye of the formula F.sup.+ A.sup.- wherein F + is the cation of an insoluble or sparingly soluble cationic azo dye, A 1 - is the anion of an insoluble or sparingly soluble cationic azo dye, M + is a non-chromophoric cation, and A - is a non-chromophoric carboxylate anion, with the provisos that 1. the reactants and solvent system are chosen such that F + A - is more soluble in the solvent system than is F + A 1 - , 2. f + a - is soluble enough to form a concentrated solution in the solvent system, 3 M + A - and F + A 1 - are present in amounts sufficient for the preparation of a concentrated solution, and 4. M + A - is soluble or partially soluble in the solvent system, and b. removing any precipitated salts.
Claim 9
Dependent Claim
21 words
A process according to claim 4 wherein the concentrated solution of the cationic azo dye has a dye concentration of 15-50%
Claim 10
Dependent Claim
72 words
A process according to claim 5 wherein F + is the cation of an insoluble or sparingly soluble cationic monoazo dye, A 1 - is chloride, sulfate, methylsulfate, phosphate or perchlorate, or a mixture thereof, M + is an ammonium, alkali metal, alkaline earth metal, zinc or lead cation, or a mixture thereof, and A - is formate, acetate, chloroacetate, propionate, benzoate, phenoxyacetate, maleate, succinate, lactate or tartarate, or a mixture thereof.
Claim 11
Dependent Claim
23 words
A process according to claim 4 wherein the solvent system is water or a mixture of water and at least one organic solvent.
Claim 12
Dependent Claim
12 words
A process according to claim 7 wherein the solvent system is water.
Claim 13
Dependent Claim
21 words
A process according to claim 8 wherein the concentrated solution of the cationic azo dye has a dye concentration of 15-50%.
Claim 14
Dependent Claim
64 words
A process according to claim 9 wherein F + is the cation of an insoluble or sparingly soluble cationic monoazo dye, A 1 - is chloride, sulfate, methylsulfate, phosphate or perchlorate, or a mixture thereof, M + is a barium, lead, calcium or zinc cation, or a mixture thereof, and A - is formate, acetate, chloroacetate, propionate, benzoate, phenoxyacetate, maleate, succinate, lactate or tartarate.
Claim 15
Dependent Claim
30 words
A process according to claim 10 wherein A 1 - is chloride, sulfate, methylsulfate, phosphate or perchlorate, and M + is a barium or lead cation, or a mixture thereof.
Claim 16
Dependent Claim
21 words
A process according to claim 8 wherein the solvent system is a mixture of water and at least one organic solvent.
Claim 17
Dependent Claim
18 words
A process according to claim 12 wherein at least 10% by weight of the solvent system is water.
Claim 18
Dependent Claim
20 words
A process according to claim 13 wherein the concentrated solution of the cationic dye has a dye concentration of 15-50%.
Claim 19
Dependent Claim
64 words
A process according to claim 14 wherein F + is the cation of an insoluble or sparingly soluble cationic monoazo dye, A 1 - is chloride, sulfate, methylsulfate, phosphate or perchlorate, or a mixture thereof, M + is a barium, lead, calcium or zinc cation, or a mixture thereof, and A - is formate, acetate, chloroacetate, propionate, benzoate, phenoxyacetate, maleate, succinate, lactate or tartarate.
Claim 20
Dependent Claim
30 words
A process according to claim 15 wherein A 1 - is chloride, sulfate, methylsulfate, phosphate or perchlorate, and M + is a barium or lead cation, or a mixture thereof.
Claim 21
Dependent Claim
23 words
A process according to claim 15 wherein the solvent system is a mixture of water and acetic acid, and A - is acetate.
Claim 22
Dependent Claim
21 words
A process according to claim 17 wherein M + a - is barium acetate or lead acetate, or a mixture thereof.
Claim 23
Dependent Claim
20 words
A process according to claim 4 wherein the solvent system is an organic solvent or a mixture of organic solvents.
Claim 24
Dependent Claim
34 words
A process according to claim 19 wherein the solvent system is benzyl alcohol, glycol, ethyl glycol, methyl ethyl ketone, dimethylformamide, tetrahydrofuran, dimethyl sulfoxide, sulfolane, propane sulfone or glacial acetic acid, or a mixture thereof.
Claim 25
Dependent Claim
21 words
A process according to claim 19 wherein the concentrated solution of the cationic azo dye has a dye concentration of 15-50%.
Claim 26
Dependent Claim
65 words
A process according to claim 21 wherein F + is the cation of an insoluble or sparingly soluble cationic monoazo dye, A 1 - is chloride or sulfate, or a mixture thereof, M + is an alkali metal, alkaline earth metal, lead, zinc or ammonium cation, or a mixture thereof, and A - is formate, acetate, chloroacetate, propionate, benzoate, phenoxyacetate, maleate, succinate, lactate or tartarate.
Claim 27
Dependent Claim
24 words
A process according to claim 22 wherein M + is a sodium, potassium, calcium, barium, lead, zinc or ammonium cation, or a mixture thereof.
Claim 28
Dependent Claim
18 words
A process according to claim 23 wherein the solvent is glacial acetic acid, and A - is acetate.
Claim 29
Dependent Claim
38 words
A process according to claim 22 wherein the solvent is glacial acetic acid, A 1 - is chloride or sulfate, M + is a sodium, potassium, calcium, barium, lead, zinc or ammonium cation, and A - is acetate.
References Cited (Backward Citations)
US2087506A
Cited
US2641610A
Cited
US2645593A
Cited
US2692285A
Cited
GB752681A
Cited
US3346322A
Cited
DE1240036B
Cited
GB1088611A
Cited
US3374221A
Cited
US3341572A
Cited
US3518244A
Cited
CH473204A
Cited
GB1193345A
Cited
US3459728A
Cited
US3580900A
Cited
US3560507A
Cited
US3578667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |