Enzymatic textile bleach-whitening methods

A textile and textile technology, applied in the field of enzyme-catalyzed textile bleaching-brightening, can solve the problems of properly and completely removing sulfur derivatives

Inactive Publication Date: 2012-01-25
HUNTSMAN ADVANCED MATERIALS (SWITZERLAND) GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Known disadvantages of these methods are related to ecology (odor, waste water, etc.) yellow question about

Method used

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  • Enzymatic textile bleach-whitening methods
  • Enzymatic textile bleach-whitening methods
  • Enzymatic textile bleach-whitening methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1A、2 and 3

[0211] Enzyme-catalyzed bleaching-brightening according to the one-bath two-step exhaust method: prescoured and heat-set nylon 66 fabrics at 175°C using a liquor ratio of 20:1 in the amount of bleaching process, sodium carbonate, said ester substrate, hydrogen peroxide and said perhydrolase in a bath. The temperature was ramped from room temperature to a target temperature of 65°C at a rate of 2°C per minute. The bath was then held at 65°C for 30 minutes and then adjusted to pH 4.5 by adding acetic acid (80%). Subsequently, the optical brightener was added to the bath in the amount given in Table 1, and the treatment was continued at 65° C. for another 20 minutes. After draining, the fabric was rinsed twice at 50°C for 10 minutes each and then dried at 70°C. Each flush contained 0.5 g / l of a 25% solution of catalase T100 (purchased from Genencor).

Embodiment 1A

[0212] Table 1 Examples 1A, 2 and 3 - Enzyme Catalyzed Bleaching - Brightening

[0213] Example #

1A

2

3

Bleached products 1) [g / l]

0.9

0.9

0.9

Sodium carbonate buffer [g / l]

2.0

2.0

2.0

Ester substrate 2) [g / l]

3.0

3.0

3.0

Hydrogen peroxide 35% [ml / l]

6.0

6.0

6.0

Peroxidase 3) [mg / l]

1.7

1.7

1.7

FWA(1a) 4) [%]

0.4

0.36

FWA(2) 5) [%]

0.26

Shading dye 6)

6)

[0214] 1) LTC (commercially available from Huntsman)

[0215] 2) Propylene glycol diethyl ester

[0216] 3) corresponds to 1.0 g / l EcoWhite (1×) (product of Genencor)

[0217] 4) Fluorescent whitening agent of formula (1a); [%] based on the weight of fabric

[0218] 5) Fluorescent whitening agent of formula (2); [%] based on the weight of fabric

[0219] 6) 0.00025% of 7-phenyl-5,9-bis(ph...

Embodiment 1B

[0231] Enzyme-catalyzed bleaching-brightening according to the two-bath two-step exhaust method:

[0232] (i) Pre-scoured and heat-set nylon 66 fabric at 175°C, treated with a bath ratio of 20:1 in a bath containing:

[0233] According to the 0.9g / l bleaching process given in Table 1,

[0234] 2.0g / l sodium carbonate buffer,

[0235] 3.0 g / l ester substrate (propylene glycol diethyl ester)

[0236] 6.0ml / l of 35% hydrogen peroxide, and

[0237] 1.7 mg / l of perhydrolase, which corresponds to 1.0 g / l of EcoWhite (1x) (product of Genencor).

[0238] The temperature was ramped from room temperature to a target temperature of 65°C at a rate of 2°C per minute. The bath was then held at 65°C for 50 minutes. After draining, the fabric was rinsed twice at 50°C for 10 minutes each and then dried at 70°C. Each flush contained 0.5 g / l of a 25% solution of catalase T100 (product of Genencor).

[0239] (ii) The dried fabric obtained according to step (i) was treated with a liquor r...

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PUM

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Abstract

A method for bleach-whitening of synthetic textile material is provided comprising contacting said textile material with (a) an enzymatic textile bleaching composition comprising (i) a perhydrolase enzyme, (ii) an ester substrate for said perhydrolase enzyme, (iii) a hydrogen peroxide source, (iv) a surfactant and/or an emulsifier, (v) a peroxide stabilizer, (vi) a sequestering agent, (vii) a buffer which maintains a pH of about 6 to about 8, and (b) at least one fluorescent whitening agent, and, optionally, (c) at least one acid or disperse shading dye for shaded variations of white, for a length of time and under conditions suitable to permit measurable whitening of the textile material, thereby producing a bleached-whitened textile material.

Description

technical field [0001] The present invention relates to a process for the enzymatic bleaching-brightening of synthetic textile materials, especially for the enzymatic bleaching-brightening of polyamides or textile materials comprising polyamides. Background technique [0002] During the processing of textile raw materials such as fibres, yarns or fabrics, pre-treatment or pre-preparation steps are often required in order to properly suit the dyeing, printing and / or finishing stages for further use and especially for the dyeing, printing and / or finishing stages which are usually required for commercial goods. The textile raw material is prepared. These textile treatment steps remove impurities and color bodies that are naturally present or those added to the fibers and / or fabrics by the spinning and weaving steps. [0003] While textile processing can include many different treatments and stages, the most common include: desizing, the removal of sizing agents (such as starch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06L3/11D06L3/12D06L3/02C11D3/386C11D3/42C11D3/39D06L4/40D06L4/60
CPCD06L3/11C11D3/42C11D3/3947D06L3/12C11D3/38636D06L4/40D06L4/60
Inventor 珍-雅克·东泽欧文·雷德林安德里亚·弗莱格布里吉特·吉森安尼塔·施米德林
Owner HUNTSMAN ADVANCED MATERIALS (SWITZERLAND) GMBH
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