US4536182A
Expired / Lapsed
US
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Bath and method for the simultaneous desizing and bleaching of fabrics
Assignee: Arkema France SA
•
Filing: 1984-03-07
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Granted: 1985-08-20
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Expires: 2004-03-07
Abstract
Abstract A bath for the simultaneous desizing and bleaching of fabrics comprising hydrogen peroxide, a sequestering agent, an amylase, a surfactant, and a buffer consisting essentially of sodium tetraborate decahydrate. Also, the method for the simultaneous desizing and bleaching a fabric comprising saturating a fabric with the above destarching and bleaching bath, maintaining the saturated fabric for a time and at a temperature sufficient to desize and bleach to the desired degree, and washing the fabric.
Inventors
- 👤 Gerard Tatin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:26
CPC Classifications
D; D06; D06L; D06L1/00; D06L1/02; D06L1/06; D06L1/12; D06L1/14; D06L4/00; D06L4/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
29 words
A bath for the simultaneous desizing and bleaching of fabrics comprising hydrogen peroxide, a sequestering agent, an amylase, a surfactant, and a buffer consisting essentially of sodium tetraborate decahydrate.
Claim 2
Dependent Claim
29 words
A bath for the simultaneous desizing and bleaching of fabrics comprising hydrogen peroxide, a sequestering agent, an amylase, a surfactant, and a buffer consisting essentially of sodium tetraborate decahydrate.
Claim 3
Dependent Claim
11 words
The bath of claim 1, including addition of a stabilizing agent.
Claim 4
Dependent Claim
60 words
The bath of claim 2, wherein the constituents thereof are present, for each liter of the aqueous bath, in the following amounts: ______________________________________
H.sub.2 O.sub.2 (35%) 40-60 ml
Sequestering Agent 2-6 g
Amylase 8-12 g
Surfactant 1-2 ml
Stabilizing Agent 20 g, and
Sodium tetraborate decahydrate in an
amount sufficient to give the bath a pH
of about 9.8.
______________________________________
Claim 5
Dependent Claim
26 words
The bath of claim 3, wherein the sequestering agent is ethylene diamine tetraacetic acid, the surfactant is a nonionic, and the stabilizing agent is sodium silicate.
Claim 6
Independent Claim
69 words
A method for the simultaneous desizing and bleaching of a fabric comprising: (a) saturating said fabric with a desizing and bleaching bath comprising hydrogen peroxide, a sequestering agent, an amylase, a surfactant, and a buffer consisting essentially of sodium tetraborate decahydrate; (b) maintaining said saturated fabric for a time and at a temperature sufficient to desize and bleach the fabric to the degree desired; and (c) washing said fabric.
Claim 7
Independent Claim
69 words
A method for the simultaneous desizing and bleaching of a fabric comprising: (a) saturating said fabric with a desizing and bleaching bath comprising hydrogen peroxide, a sequestering agent, an amylase, a surfactant, and a buffer consisting essentially of sodium tetraborate decahydrate; (b) maintaining said saturated fabric for a time and at a temperature sufficient to desize and bleach the fabric to the degree desired; and (c) washing said fabric.
Claim 8
Dependent Claim
13 words
The method of claim 5, wherein the bath also includes a stabilizing agent.
Claim 9
Dependent Claim
60 words
The method of claim 6, wherein the bath constituents are present, for each liter of the aqueous bath, in the following amounts: ______________________________________
H.sub.2 O.sub.2 (35%) 40-60 ml
Sequestering Agent 2-6 g
Amylase 8-12 g
Surfactant 1-2 ml
Stabilizing Agent 20 g, and
Sodium tetraborate decahydrate in an
amount sufficient to give the bath a pH
of about 9.8.
______________________________________
Claim 10
Dependent Claim
25 words
The method of claim 7, wherein the sequestering agent is ethylene diamine tetraacetic acid, the surfactant is nonionic, and the stabilizing agent is sodium silicate.
Claim 11
Dependent Claim
21 words
The method of claim 8, wherein the temperature is 90° to 95° C. and the treatment time is approximately one hour.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-19 | 1989-02-18 | 1989-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-19 | 1993-02-18 | 1993-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-19 | 1997-02-18 | 1997-08-20 | $7700.00 | Window Closed / Lapsed |