Patent US3990846A successfully refreshed from Google Patents.
US3990846A
Expired / Lapsed
US
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Process for the continuous dyeing and printing of piece goods
Assignee: Hoechst AG
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Filing: 1974-08-06
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Granted: 1976-11-09
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Expires: 1994-08-06
Abstract
Abstract Process for the continuous dyeing and printing of piece goods made of synthetic polyamide fibers, preferably blended with cellulosic fibers, using reactive dyestuffs according to a thermofixing method, by applying onto the textile material an aqueous padding liquor or a printing paste, which has been weakly acidified by means of a buffer system of acetic acid and an alkali metal acetate and which contains a fiber-reactive dyestuff whose reactive groups have reversibly been masked by reaction with an alkali metal salt of an N-alkyl-aminoalkyl-sulfonic acid, and after drying of the material fixing the dyestuff on the two fiber components by means of dry heat.
Inventors
- 👤 Armand Lehinant
- 👤 Joachim Walter Lehmann
- 👤 Hans-Peter Maier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:19
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/248; D06P1/00; D06P1/0048; D06P1/44; D06P1/653; D06P1/6533; D06P3/82; D06P3/8204; D06P3/8219; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/918; Y10S8/92; Y10S8/924
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
111 words
In a process for the continuous dyeing and printing of fabrics comprising a blend of synthetic polyamide fibers and cellulose fibers, using reactive dyestuffs according to a thermofixing method, the improvement which comprises forming an aqueous padding liquor or a printing paste, weakly acidified by means of a buffer system of acetic acid and an alkali metal acetate and containing a fiber-reactive dyestuff whose reactive groups have reversibly been masked by reaction with an alkali metal salt of an N-alkyl-aminoalkylsulfonic acid, thereafter applying said padding liquor or printing paste onto said fabric, and after drying of the fabric, fixing the dyestuff on the two fiber components by means of dry heat.
Claim 2
Dependent Claim
111 words
In a process for the continuous dyeing and printing of fabrics comprising a blend of synthetic polyamide fibers and cellulose fibers, using reactive dyestuffs according to a thermofixing method, the improvement which comprises forming an aqueous padding liquor or a printing paste, weakly acidified by means of a buffer system of acetic acid and an alkali metal acetate and containing a fiber-reactive dyestuff whose reactive groups have reversibly been masked by reaction with an alkali metal salt of an N-alkyl-aminoalkylsulfonic acid, thereafter applying said padding liquor or printing paste onto said fabric, and after drying of the fabric, fixing the dyestuff on the two fiber components by means of dry heat.
Claim 3
Dependent Claim
22 words
A process of claim 1, wherein a reactive dyestuff is used which has been reacted with N-methyltaurine or the sodium salt thereof.
Claim 4
Dependent Claim
11 words
A process to claim 1, wherein a methyltaurino-ethylsulfone dyestuff is used.
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) | 1979-11-09 | 1980-05-10 | 1980-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-09 | 1984-05-10 | 1984-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-09 | 1988-05-10 | 1988-11-09 | $7700.00 | Window Closed / Lapsed |