US4131423A
Expired / Lapsed
US
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Process for dyeing cellulose fibers with vat or sulfur dyes and oxyhalogen acid
Assignee: Ise Chemicals Corp
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Filing: 1977-07-29
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Granted: 1978-12-26
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Expires: 1997-07-29
Abstract
Abstract A process for dyeing fibers using a water-insoluble dye such as a sulfur dye comprises reductive dissolution and oxidative fixing using an oxyhalogen acid as oxidizing agent.
Inventors
- 👤 Hiroshi Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:13
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/30; D06P1/22
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
77 words
In a process for dyeing cellulosic fibers, in which a water-soluble dye selected from the group consisting of sulfur dyes, vat dyes and sulfur vat dyes is reductively dissolved for adherence to the fibers and the dye is then fixed on said fibers by an oxidative treatment, the improvement which comprises using an oxyhalogen acid selected from the group consisting of HClO 3 , HBrO 3 and HIO 3 as an oxidizing agent for said oxidative treatment.
Claim 2
Dependent Claim
77 words
In a process for dyeing cellulosic fibers, in which a water-soluble dye selected from the group consisting of sulfur dyes, vat dyes and sulfur vat dyes is reductively dissolved for adherence to the fibers and the dye is then fixed on said fibers by an oxidative treatment, the improvement which comprises using an oxyhalogen acid selected from the group consisting of HClO 3 , HBrO 3 and HIO 3 as an oxidizing agent for said oxidative treatment.
Claim 3
Dependent Claim
14 words
The process of claim 1, in which said water-insoluble dye is a sulfur dye.
Claim 4
Dependent Claim
13 words
The process of claim 1, in which said oxyhalogen acid is iodic acid.
Claim 5
Dependent Claim
13 words
The process of claim 1, in which said oxyhalogen acid is bromic acid.
Claim 6
Dependent Claim
13 words
The process of claim 1, in which said oxyhalogen acid is chloric acid.
Claim 7
Dependent Claim
22 words
The process of claim 1, in which said oxidative treatment is carried out at a temperature of from 20° to 100° C.
Claim 8
Dependent Claim
29 words
The process of claim 1, in which said oxidative treatment is carried out while maintaining the pH at 3 to 6, without adding any acid other than oxyhalogen acids.
Claim 9
Dependent Claim
29 words
The process of claim 1, in which said oxidative treatment is carried out using an aqueous solution containing an oxyhalogen acid in a concentration of at least 0.1 g/l.
Claim 10
Dependent Claim
14 words
The process of claim 1, in which said water-insoluble dye is a vat dye.
Claim 11
Dependent Claim
15 words
The process of claim 1, in which said water-insoluble dye is a sulfur vat dye.
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) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |