US3838967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of textile materials
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1971-09-20
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Granted: 1974-10-01
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Expires: 1991-09-20
Abstract
Abstract A process for the bleaching and/or desizing of textile materials which comprises treating a textile material with hydrogen peroxide in the presence of a base, the hydrogen peroxide being applied as an emulsion of aqueous hydrogen peroxide in a hydrocarbon or halogenated hydrocarbon solvent.
Inventors
- 👤 M Shepley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:28
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/90; D06P1/92; D06P1/922; D06F; D06F43/00; D06F43/007; D06L; D06L1/00; D06L1/02; D06L1/06; D06L4/00; D06L4/10; D06L4/17; D06P1/22; D06P1/38; D06P1/39; D06P3/00; D06P3/82; D06P3/8204; D06P3/8223; D06P3/8228
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
110 words
IN A PROCESS FOR THE TREATMENT OF A TEXTILE MATERIAL BY IMPREGNATING THE TEXTILE WITH A DISPERSION OF A BLEACHING AGENT IN HYDROCARBON OR HALOGENATED HYDROCARBON SOLVENT, REMOVING THE SOLVENT FROM THE IMPREGNATED TESTILE MATERIAL AND WASHING THE TEXTILE MATERIAL, AND WHEREIN SAID IMPREGNATION IN THE DISPERSION IS FOR SUCH A LENGTH OF TIME THAT ANY SOLENTSOLUBLE SUBSTANCES IN THE FIBERS REMAINS IN ASSOCIATION WITH THE IMPREGNATED TEXTILE, THE IMPROVEMENT CONSISTING ESSENTIALLY OF APPLYING AS BLEACHING AGENT AN AQUEOUS EMULSION OF HYDROGEN PEROXIDE IN THE SAID SOLVENT AND BLEACHING IS CARRIED OUT IN THE PRESENCE OF A BASE SELECTED FROM THE GROUP CONSISTING OF AN ALKALI METAL HYDROXIDE OR ALKOXIDE.
Claim 2
Dependent Claim
110 words
IN A PROCESS FOR THE TREATMENT OF A TEXTILE MATERIAL BY IMPREGNATING THE TEXTILE WITH A DISPERSION OF A BLEACHING AGENT IN HYDROCARBON OR HALOGENATED HYDROCARBON SOLVENT, REMOVING THE SOLVENT FROM THE IMPREGNATED TESTILE MATERIAL AND WASHING THE TEXTILE MATERIAL, AND WHEREIN SAID IMPREGNATION IN THE DISPERSION IS FOR SUCH A LENGTH OF TIME THAT ANY SOLENTSOLUBLE SUBSTANCES IN THE FIBERS REMAINS IN ASSOCIATION WITH THE IMPREGNATED TEXTILE, THE IMPROVEMENT CONSISTING ESSENTIALLY OF APPLYING AS BLEACHING AGENT AN AQUEOUS EMULSION OF HYDROGEN PEROXIDE IN THE SAID SOLVENT AND BLEACHING IS CARRIED OUT IN THE PRESENCE OF A BASE SELECTED FROM THE GROUP CONSISTING OF AN ALKALI METAL HYDROXIDE OR ALKOXIDE.
Claim 3
Dependent Claim
18 words
A process as claimed in claim 1 wherein the alkali metal hydroxide is sodium hydroxide or potassium hydroxide.
Claim 4
Dependent Claim
17 words
A process as claimed in claim 1 wherein the alkoxide group contains one to four carbon atoms.
Claim 5
Dependent Claim
15 words
A process as claimed in claim 1 wherein the alkali metal is sodium or potassium.
Claim 6
Dependent Claim
21 words
A process as claimed in claim 1 wherein the bleaching takes place at a pH in the range 9 to 13.
Claim 7
Dependent Claim
23 words
A process as claimed in claim 1 wherein the concentration of hydrogen peroxide in the emulsion is from 0.5% to 5% by weight.
Claim 8
Dependent Claim
12 words
A process as claimed in claim 1 wherein the solvent is trichloroethylene.
Claim 9
Dependent Claim
12 words
A process as claimed in claim 1 wherein the solvent is perchloroethylene.
Claim 10
Dependent Claim
13 words
A process as claimed in claim 1 wherein the solvent is white spirit.
Claim 11
Dependent Claim
19 words
A process as claimed in claim 1 wherein the emulsion contains 0.25% to 5% by weight of emulsifying agent.
Claim 12
Dependent Claim
28 words
A process as claimed in claim 1 wherein the solvent of the emulsion is removed from the textile material after application of the emulsion to the textile material.
Claim 13
Dependent Claim
15 words
A process as claimed in claim 1 wherein the textile material treated contains cotton fibres.
Claim 14
Dependent Claim
15 words
A process as claimed in claim 1 wherein the textile material treated contains polyester fibres.
Claim 15
Dependent Claim
16 words
A process as claimed in claim 1 wherein the textile material treated contains regenerated cellulose fibres.
Claim 16
Dependent Claim
16 words
A process as claimed in claim 1 wherein the textile material is treated in open width.
Claim 17
Dependent Claim
26 words
A process as claimed in claim 1 wherein the emulsion is applied to a wet textile material which has been subjected to a solvent scouring process.
Claim 18
Dependent Claim
17 words
A process as claimed in claim 3 wherein the alkoxide group is a methoxide or ethoxide group.
Claim 19
Dependent Claim
21 words
A process as claimed in claim 5 wherein the bleaching takes place at a pH in the range 10 to 12.5.
Claim 20
Dependent Claim
19 words
A process as claimed in claim 10 wherein the emulsion contains 1% to 2% by weight of emulsifying agent.
Claim 21
Dependent Claim
21 words
A process as claimed in claim 10 wherein the emulsifying agent is a condensate of an alkyl phenol with ethylene oxide.
Claim 22
Dependent Claim
20 words
A process as claimed in claim 10 wherein the emulsifying agent is a salt of an alkyl aryl sulphonic acid.
Claim 23
Dependent Claim
15 words
A process as claimed in claim 10 wherein the emulsifying agent is coconut oil diethanolamide.
Claim 24
Dependent Claim
20 words
A process as claimed in claim 21 wherein the emulsifying agent is an amine salt of dodecyl benzene sulphonic acid.
Claim 25
Dependent Claim
19 words
A process as claimed in claim 11 wherein the solvent is removed by passing the textile material into steam.
Claim 26
Dependent Claim
18 words
A process as claimed in claim 11 wherein the textile material is washed after removal of the solvent.
Claim 27
Dependent Claim
33 words
A process as claimed in claim 24 wherein the textile material is passed through a solvent flash-off vessel in which steam flows essentially counter to the direction of movement of the textile material.
Claim 28
Dependent Claim
21 words
A process as claimed in claim 25 in which the washing of the textile material is in a dilute alkaline solution.
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |