US3956271A
Expired / Lapsed
US
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Process for the production of concentrated solutions of cationic azo dyes
Assignee: Sandoz AG
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Filing: 1974-02-06
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Granted: 1976-05-11
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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 06:45
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.
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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 |