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US4536182A Expired / Lapsed US ⏱️ 0.0 years remaining

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
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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)

GB1442419A Cited
JPS51103088A Cited
US4100095A Cited
US4170453A Cited
US4195974A Cited
US4391745A Cited
EP0055664A1 Cited
US4457760A Cited

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

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