US4057389A
Expired / Lapsed
US
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Process for the printing with developing dyes
Assignee: Hoechst AG
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Filing: 1976-04-06
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Granted: 1977-11-08
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Expires: 1996-04-06
Abstract
Abstract Cellulosic material is printed with a paste containing the alkaline solution of a coupler, the dispersion of a diazotable aromatic amine, a nitrite and a thickener, and the dyestuff is developed on the fiber by adding solutions of organic acids and, after a short air passage, contacting the dyeing or print with an alkaline agent.
Inventors
- 👤 Erich Feess
- 👤 Willy Gronen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:51
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/58; D06P3/60; D06P3/68; Y; Y10; Y10S; Y10S534/00; Y10S534/01; Y10S8/00; Y10S8/907; Y10S8/916; Y10S8/918
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
110 words
A process for printing cellulosic textile material with a printing paste containing a. the alkaline solution of a coupling component capable of forming developing dyes, b. the dispersion of a diazotable amine capable of forming developing dyes, c. sodium nitrite and d. a thickener, which process comprises developing the dyestuff on the fiber by adding a dilute aqueous solution of an organic acid of which at least 30 g are soluble in 100 g water, having at 20° C a pK value of 4 to 2.5 and at normal pressure a boiling point above 175° C, followed by a short air passage and a subsequent contact with an alkaline agent.
Claim 2
Dependent Claim
110 words
A process for printing cellulosic textile material with a printing paste containing a. the alkaline solution of a coupling component capable of forming developing dyes, b. the dispersion of a diazotable amine capable of forming developing dyes, c. sodium nitrite and d. a thickener, which process comprises developing the dyestuff on the fiber by adding a dilute aqueous solution of an organic acid of which at least 30 g are soluble in 100 g water, having at 20° C a pK value of 4 to 2.5 and at normal pressure a boiling point above 175° C, followed by a short air passage and a subsequent contact with an alkaline agent.
Claim 3
Dependent Claim
18 words
A process as claimed in claim 1, wherein the cellulosic material consists predominantly or entirely of cellulose fibers.
Claim 4
Dependent Claim
21 words
A process as claimed in claim 1, wherein the printing paste contains additionally a soluble leuko sulfuric acid ester vat dye.
Claim 5
Dependent Claim
17 words
A process as claimed in claim 1, wherein the coupling component has a low or medium substantivity.
Claim 6
Dependent Claim
26 words
A process as claimed in claim 4, wherein the coupling component is an arylamide of acetoacetic acid, 2-hydroxy-3-naphthoic acid or of a heterocyclic ortho-hydroxy carboxylic acid.
Claim 7
Dependent Claim
31 words
A process as claimed in claim 1, wherein the coupling component is 2-hydroxynaphthalene-3-carboxylic acid phenylamide which is unsubstituted or substituted in the phenyl nucleus by halogen, lower alkyl or lower alkoxy.
Claim 8
Dependent Claim
18 words
A process as claimed in claim 1, wherein the amine is not or only scarcely volatile with steam.
Claim 9
Dependent Claim
31 words
A process as claimed in claim 7, wherein the amine is a nitroaniline, an anthranilic acid amide, an aniline sulfonic acid amide, an aminobenzonitrile, a benzoyl phenylene diamine or a diamino-biphenyl.
Claim 10
Dependent Claim
45 words
A process as claimed in claim 1, wherein the organic acid is a monohydroxy monocarboxylic acid, a dihydroxy dicarboxylic acid, a monohydroxy tricarboxylic acid or a haloalkanoic acid each having up to 3 carbon atoms in their skeleton to which the carboxy groups are bound.
Claim 11
Dependent Claim
17 words
A process as claimed in claim 1, wherein the air passage lasts about 0.5 to 3 minutes.
Claim 12
Dependent Claim
17 words
A process as claimed in claim 10, wherein the period of time is 1 to 2 minutes.
Claim 13
Dependent Claim
31 words
A process as claimed in claim 1, wherein contacting with an alkaline agent is effected by passing the dyed or printed fabric through an alkaline solution or through an alkaline gas.
Claim 14
Dependent Claim
23 words
A process as claimed in claim 12, wherein contacting with the alkaline agent effects a pH of 7 to 8 on the fabric.
Claim 15
Dependent Claim
19 words
A process as claimed in claim 12, wherein the alkaline solution has a temperature of 70° to 80° C.
Claim 16
Dependent Claim
22 words
A process as claimed in claim 12, wherein the alkaline solution is an aqueous solution of sodium carbonate, trisodium phosphate or ammonia.
Claim 17
Dependent Claim
17 words
A process as claimed in claim 12, wherein the alkaline gas is ammonia or a volatile amine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |