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Formaldehyde-free durable press finishing agent

a technology of durable press and formaldehyde, applied in the field of durable press finishing agent, can solve the problems of eutrophication of lakes or rivers, change in color tone, human body, etc., and achieve the effect of giving fabrics wrinkle-free performan

Inactive Publication Date: 2005-02-24
GREEN TEX CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides a durable press finish composition that uses glyoxal as a crosslinker, which is inexpensive and non-poisonous to the human body. The composition also includes a catalyst and an additive to minimize reductions in strength and whiteness of fabrics. The crosslinker is modified with ethylene glycol and diethylene glycol, and the catalyst is selected from aluminum sulfate and a mixture of magnesium chloride and citric acid. The additive includes sodium tetraborate, sodium peroxoborate, sodium chlorite, and sodium hydrogen sulfate. The technical effects of this invention include providing a cost-effective and safe finish for fabrics that results in wrinkle-free performance, while also minimizing damage to strength and whiteness of fabrics."

Problems solved by technology

However, this crosslinker generates formaldehyde harmful to the human body, and thus, is currently used in a limited manner.
However, this butanetetracarboxylic acid is disadvantageous in that it can cause the eutrophication of lakes or rivers upon the durable press finishing of fabrics with it due to a phosphorus component of sodium hypophosphite known as the most excellent catalyst.
Furthermore, it can cause a change in color tone depending on a dye upon dying and also is highly expensive such that it cannot be used in industrial applications.
However, when aluminum salt is used as a catalyst in durable press finishing using glyoxal as a crosslinker, fabrics can give excellent wrinkle-free performance but is disadvantageous in that serious reductions in strength and whiteness of fabrics can be caused.

Method used

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  • Formaldehyde-free durable press finishing agent
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  • Formaldehyde-free durable press finishing agent

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] Gloxal as a crosslinker was dissolved in water at a concentration of 5% by weight, to which aluminum sulfate as a catalyst was added at a molar ratio of 0.04 relative to the glyoxal, thereby producing the finishing solution 1. To the finishing solution 1, each of ethylene glycol and diethylene glycol was added at a molar ratio of 1:1 relative to the glyoxal, thereby producing the finishing solutions 2 and 3, respectively. Then, 100% cotton fabrics are finished with each of the finishing solutions 1, 2 and 3 by a pad-dry-cure method. In this case, the pad was carried out in a 2dip-2nip manner such that a wet pick-up is set at about 95%. The dry is carried out at 85° C. for 3 minutes and the cure at 150° C. for 3 minutes.

[0032] The fabrics which had been finished under the above conditions were measured for their wrinkle recovery angle according to AATCC Test Method 66-1998. Also, their tensile strength was measured according to ASTM D 1682-64 and their whiteness index was mea...

example 2

[0033] The additive of Formula 10 was added to the finishing solution 2 produced in Example 1, at a molar ratio of 0.25-1.5 relative to aluminum sulfate as a catalyst, thereby producing a finishing solution. 100% cotton fabrics were finished with this finishing solution and measured for their physical properties in the same manner as in Example 1. The results showed that the wrinkle recovery angle of the finished fabrics was gradually reduced with an increase in concentration of the additive, but higher than that of fabrics finished with the prior durable press finishes. Also, it could be found that their tensile strength and whiteness index were gradually increased with an increase in concentration of the additive. Thus, it could be found that all the physical properties of the fabrics finished with this finishing solution were equal or superior to fabrics finished with the prior durable press finishes. As in Example 1, there was no detection of formaldehyde in the fabrics finished...

example 3

[0034] Glyoxal as a crosslinker was dissolved in water at a concentration of 5%, to which a mixture of magnesium chloride and citric acid as a catalyst was then added, thereby producing a finishing solution. 100% cotton fabrics were finished with this finishing solution in the same manner as in Example 2. In this case, the molar ratio of magnesium chloride to glyoxal was 0.2, and the molar ratio of citric acid to magnesium chloride varied in the range of 0.1-0.5.

[0035] The finished cotton fabrics were measured for their physical properties in the same manner as in Example 1. The results showed that the wrinkle recovery angle of the fabrics finished with the solution of Example 3 was superior to fabrics finished with the prior durable press finishes. But their tensile strength and whiteness index were somewhat reduced, and there was no detection of formaldehyde in the fabrics finished with the solution of Example 3.

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Abstract

The present invention relates to a durable press finish composition, which contains a crosslinker for giving wrinkle-free performance to fabrics, a catalyst, and an additive allowing reductions in strength and whiteness of fabrics to be minimized. As the crosslinker, there is used glyoxal containing no formaldehyde. As the catalyst, there is used one selected from aluminum salt, magnesium salt, citric acid and a mixture thereof. As the additive, there is used sodium tetraborate, sodium peroxoborate, sodium chlorite, or sodium hydrogen sulfate.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a durable press finishing agent containing no formaldehyde harmful to the human body, and more particularly, to a durable press finish composition, which contains: glyoxal as a crosslinker; ethylene glycol or diethylene glycol as an agent for modifying the crosslinker; aluminum salt, magnesium salt or citric acid as a catalyst for imparting wrinkle-free performance to fabrics; and sodium tetraborate, sodium peroxoborate, sodium chlorite or sodium hydrogen sulfate as an additive for preventing a reduction in strength of fabrics and for increasing the whiteness of fabrics. [0003] 2. Background of the Related Art [0004] Durable press finishing, which is also called the wash and wear finishing or the DP finishing, is conducted for the purpose of artificially forming crosslinkages at a non-crystalline region of cellulose forming cotton fabrics to increase the elastic limit of the cotton f...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D06M11/30D06M11/82D06M13/123D06M13/148
CPCD06M11/30D06M11/82D06M2200/20D06M13/148D06M2101/06D06M13/123
Inventor KIM, SEUNG IL
Owner GREEN TEX CHEM
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