US3957428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of textile materials
Assignee: Imperial Chemical Industries Ltd
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Filing: 1972-09-20
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Granted: 1976-05-18
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Expires: 1992-09-20
Abstract
Abstract A process for uniformly and thoroughly bleaching textile material having contaminate in the fibers comprising: 1. IMPREGNATING THE CONTAMINATED TEXTILE MATERIAL WITH A SOLUTION OF A SURFACE-ACTIVE AGENT IN A HYDROCARBON OR HALOGENATED HYDROCARBON SOLVENT AND STEAMING THE IMPREGNATED TEXTILE MATERIAL TO REMOVE SOLVENT, WHEREBY SUBSTANTIALLY ALL OF THE CONTAMINATION IN THE FIBERS AND THE SURFACE-ACTIVE AGENT REMAIN IN THE TEXTILE MATERIAL; 2. IMPREGNATING THE TEXTILE MATERIAL WITH THE CONTAMINATION AND SURFACE-ACTIVE AGENT WITH AN AQUEOUS BLEACHING SOLUTION CONTAINING, AS A BLEACHING AGENT, HYDROGEN PEROXIDE; 3. STEAMING THE TEXTILE MATERIAL; AND 4. WASHING THE TEXTILE MATERIAL WITH AN AQUEOUS MEDIUM.
Inventors
- 👤 John Massey
- 👤 Martin Alan Shepley
- 👤 Roger N. Suiter
- 👤 John M. Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:09
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/10; D06L4/12; D06L4/18
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
85 words
A process for uniformly and thoroughly bleaching textile material having contaminate in the fibers comprising: 1. impregnating the contaminated textile material with a solution of a surface-active agent in a hydrocarbon or halogenated hydrocarbon solvent and steaming the impregnated textile material to remove solvent, whereby substantially all of the contamination in the fibers and the surface-active agent remain in the textile material; 2. impregnating the textile material with the contamination and surface-active agent with an aqueous bleaching solution containing, as a bleaching agent, hydrogen peroxide;
Claim 2
Dependent Claim
85 words
A process for uniformly and thoroughly bleaching textile material having contaminate in the fibers comprising: 1. impregnating the contaminated textile material with a solution of a surface-active agent in a hydrocarbon or halogenated hydrocarbon solvent and steaming the impregnated textile material to remove solvent, whereby substantially all of the contamination in the fibers and the surface-active agent remain in the textile material; 2. impregnating the textile material with the contamination and surface-active agent with an aqueous bleaching solution containing, as a bleaching agent, hydrogen peroxide;
Claim 3
Dependent Claim
14 words
steaming the textile material; and 4. washing the textile material with an aqueous medium.
Claim 4
Dependent Claim
14 words
steaming the textile material; and 4. washing the textile material with an aqueous medium.
Claim 5
Dependent Claim
28 words
The process of claim 1 wherein a bleaching adjuvant is applied to the textile material prior to or with or subsequent to the impregnation with the bleaching agent.
Claim 6
Dependent Claim
29 words
A process as claimed in claim 1 in which an aqueous solution of the bleaching agent and an aqueous solution of bleaching adjuvant is applied to the textile material.
Claim 7
Dependent Claim
27 words
A process as claimed in claim 3 in which an aqueous solution of the bleaching agent and the bleaching adjuvant are applied separately to the textile material.
Claim 8
Dependent Claim
59 words
A process as claimed in claim 4 wherein an aqueous solution of the bleaching agent is applied to the textile material and the textile material is then passed into an atmosphere of steam and the vapour of a base to create thereon the aqueous solution of the bleaching agent and a bleaching adjuvant and to steam the textile material.
Claim 9
Dependent Claim
16 words
A process as claimed in claim 5 wherein the said vapour of a base comprises ammonia.
Claim 10
Dependent Claim
40 words
A process as claimed in claim 1 wherein the amount of hydrogen peroxide in the aqueous solution of the bleaching agent and the bleaching adjuvant is from 0.5 to 10% by weight of the solution calculated as 35% hydrogen peroxide.
Claim 11
Dependent Claim
15 words
A process as claimed in claim 7 wherein the amount is approximately 4% by weight.
Claim 12
Dependent Claim
15 words
A process as claimed in claim 1 wherein the bleaching adjuvant is a water-soluble base.
Claim 13
Dependent Claim
13 words
A process as claimed in claim 9 wherein the base is sodium hydroxide.
Claim 14
Dependent Claim
17 words
A process as claimed in claim 1 wherein the bleaching adjuvant contains a stabiliser for hydrogen peroxide.
Claim 15
Dependent Claim
26 words
A process as claimed in claim 9 wherein the pH of the aqueous solution of the bleaching agent and the bleaching adjuvant is greater than 9.
Claim 16
Dependent Claim
15 words
A process as claimed in claim 12 wherein the pH is from 10 to 12.
Claim 17
Dependent Claim
39 words
A process as claimed in claim 10 wherein the amount of the sodium hydroxide is from 5 to 6% by weight calculated as 50% sodium hydroxide, based on the aqueous solution of the bleaching agent and the bleaching adjuvant.
Claim 18
Dependent Claim
24 words
A process as claimed in claim 1 wherein the aqueous solution of a bleaching agent and a bleaching adjuvant includes an optical brightening agent.
Claim 19
Dependent Claim
25 words
A process as claimed in claim 1 wherein the textile material after creation thereon of said aqueous solution is subjected to steam at about 100°C.
Claim 20
Dependent Claim
23 words
A process as claimed in claim 1 wherein the textile material after creation thereon of said aqueous solution is subjected to superheated steam.
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) | 1979-05-18 | 1979-11-17 | 1980-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-18 | 1983-11-17 | 1984-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-18 | 1987-11-17 | 1988-05-18 | $7700.00 | Window Closed / Lapsed |