US4029469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coloring process for synthetic textile materials
Assignee: Imperial Chemical Industries Ltd
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Filing: 1975-10-08
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Granted: 1977-06-14
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Expires: 1995-10-08
Abstract
Abstract Process for coloring aromatic polyester textile materials which comprises applying to the said textile material by an aqueous dyeing, padding or printing process an aqueous dispersion of a water-insoluble monoazo dyestuff of the formula:- ##STR1## wherein X is hydrogen or methyl, Y and Z are each independently chlorine or bromine, and R is lower alkyl, and subsequently subjecting the colored textile material to a treatment in an aqueous solution of sodium hydrosulphite whereby the aromatic polyester textile materials are colored in brown shades of excellent fastness properties.
Inventors
- 👤 Violet Boyd
- 👤 Brian Ribbons Fishwick
- 👤 Brian Glover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:52
CPC Classifications
D; D06; D06P; D06P5/00; D06P5/02; D06P5/10; C; C09; C09B; C09B29/00; C09B29/06; C09B29/08; C09B29/0805; C09B29/0807; C09B29/0809; C09B29/0811; C09B29/0815; C09B29/0816; C09B29/0817; C09B29/34; C09B29/36; C09B29/3604; C09B29/3617; C09B29/3621; C09B29/3626; C09B29/363; D06P3/00; D06P3/34; D06P3/40; D06P3/46; D06P3/48; D06P3/52; D06P3/54; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
86 words
Process for colouring aromatic polyester textile materials which comprises applying to the said textile material by an aqueous dyeing, padding or printing process an aqueous dispersion of a water-insoluble monoazo dyestuff of the formula: ##STR5## wherein X is hydrogen or methyl, Y and Z are each independently chlorine or bromine, and R is lower alkyl, and subsequently subjecting the coloured textile material to a treatment in an aqueous solution containing from 0.05 to 0.5% of sodium hydrosulphite at a temperature of from 50° to 85° C.
Claim 2
Dependent Claim
86 words
Process for colouring aromatic polyester textile materials which comprises applying to the said textile material by an aqueous dyeing, padding or printing process an aqueous dispersion of a water-insoluble monoazo dyestuff of the formula: ##STR5## wherein X is hydrogen or methyl, Y and Z are each independently chlorine or bromine, and R is lower alkyl, and subsequently subjecting the coloured textile material to a treatment in an aqueous solution containing from 0.05 to 0.5% of sodium hydrosulphite at a temperature of from 50° to 85° C.
Claim 3
Dependent Claim
24 words
Process as claimed in claim 1 wherein the aqueous solution of sodium hydrosulphite additionally contains from 0.05 to 0.5% of an alkali metal hydroxide.
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) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |