US3972677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of discharge effects on dyeings or prints made with disperse dyes on flat-surface textile structures of synthetic fibers
Assignee: Hoechst AG
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Filing: 1974-03-21
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Granted: 1976-08-03
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Expires: 1994-03-21
Abstract
Abstract Process for the preparation of discharge effects under or on dyeings or prints with disperse dyes on flat-surface textile structures made of synthetic fibers, which process comprises applying to the textile material a dyeing by padding, slop-padding or printing dischargeable disperse dyes and drying at mild temperatures, printing on the dyeing which has not yet been fixed a discharge paste containing discharge-resistent disperse dyes and fixing that paste after intermediate drying either by a steaming process in saturated steam followed by a treatment with dry heat or a treatment with over-heated steam, or by steaming in pressurized steam.
Inventors
- 👤 Erich Feess
- 👤 Heinz Dethloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:47
CPC Classifications
D; D06; D06P; D06P5/00; D06P5/15; D06P5/155; D06Q; D06Q1/00; D06Q1/02; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921; Y10S8/922
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
137 words
A process for the preparation of discharge effects on flat-surface textile structures made of synthetic fibers which comprises: applying to the textile material, as a first step, a dyeing with dischargeable disperse dyes or a mixture of dischargeable and discharge-resistant disperse dyestuffs, by padding, slop-padding or printing; thereafter, without intermediate drying or with drying at mild temperatures whereby no fixing occurs, as a second step, printing on the said dyeing a discharge paste which contains a discharge-resistant disperse dyestuff if the said dyeing did not apply a discharge-resistant dye; and as a third step fixing the dyeings by a. either a steaming process in saturated steam followed by (1) a treatment with dry heat or (2) a treatment with superheated steam at 170 to 190° C, or b. steaming in pressurized steam under 1.5 - 2.5 atmg.
Claim 2
Dependent Claim
137 words
A process for the preparation of discharge effects on flat-surface textile structures made of synthetic fibers which comprises: applying to the textile material, as a first step, a dyeing with dischargeable disperse dyes or a mixture of dischargeable and discharge-resistant disperse dyestuffs, by padding, slop-padding or printing; thereafter, without intermediate drying or with drying at mild temperatures whereby no fixing occurs, as a second step, printing on the said dyeing a discharge paste which contains a discharge-resistant disperse dyestuff if the said dyeing did not apply a discharge-resistant dye; and as a third step fixing the dyeings by a. either a steaming process in saturated steam followed by (1) a treatment with dry heat or (2) a treatment with superheated steam at 170 to 190° C, or b. steaming in pressurized steam under 1.5 - 2.5 atmg.
Claim 3
Dependent Claim
22 words
Process as claimed in claim 1, wherein a discharge printing paste is used which contains tin salt or sulfoxylates as discharge agent.
Claim 4
Dependent Claim
20 words
Process as claimed in claim 1, wherein the discharge printing paste is applied to the said dyeing without intermediate drying.
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) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |