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Anti-wrinkle finishing agent for cotton fabrics, and preparation method and application thereof

An anti-wrinkle finishing agent and anti-wrinkle finishing technology, which is applied in the direction of textiles and papermaking, fiber treatment, plant fiber, etc., can solve the problems of fabric strength reduction, poor washability and yellowing of fabrics, and improve washability and cost. low, stable effect

Inactive Publication Date: 2016-10-05
JIANGSU LIANFA TEXTILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems that traditional anti-wrinkle finishing agents release formaldehyde, cause fabric strength reduction, yellowing, and poor washability of fabrics, the present invention provides an anti-wrinkle finishing agent for cotton fabrics, which is a combination of polyether flexible segments and Excessive isophorone diisocyanate is polymerized, and then the excess isocyanate group is blocked to prepare a blocked water-based polyurethane

Method used

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  • Anti-wrinkle finishing agent for cotton fabrics, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Preparation of waterborne polyurethane prepolymer:

[0030] At 60°C, add 16.7g isophorone diisocyanate and 0.1g catalyst dibutyltin dilaurate after dehydration of 39g polyether diol (molecular weight 2000) and 3.4g water-soluble chain extension component dimethylol propionic acid , stirred evenly, heated up to 95° C., protected by nitrogen, and reacted for 4 hours to obtain a water-based polyurethane prepolymer.

[0031] (2) Preparation of end-capped waterborne polyurethane:

[0032] At 20°C, 3.2g of capping agent NaHSO 3 0.7g Accelerator Na 2 SO 3 Add 4.5mL ethanol to the above water-based polyurethane prepolymer, then add 3.2mL triethylamine to neutralize, after reacting for 0.5 hours, add 150g deionized water under vigorous stirring to disperse, and after 0.5 hours, sodium bisulfite-capped Clear and stable aqueous polyurethane solution.

[0033] (3) Anti-wrinkle finishing:

[0034] Dip cotton muslin cloth twice in the above finishing solution and roll twic...

Embodiment 2

[0038] (1) Preparation of water-based polyurethane prepolymer: at 60°C, 27.5g polyether diol (molecular weight 1000) and 3.15g water-soluble chain-extending component dimethylol propionic acid were dehydrated and 19.9g isofor was added Ketone diisocyanate and 0.1 g of catalyst dibutyltin dilaurate were stirred evenly, and the temperature was raised to 95° C. under nitrogen protection. After 4 hours of reaction, a water-based polyurethane prepolymer was obtained.

[0039] (2) Preparation of end-capped waterborne polyurethane:

[0040] At 20°C, 4.1g of capping agent NaHSO 3 0.9g Accelerator Na 2 SO 3 Add 4 mL of ethanol to the above water-based polyurethane prepolymer, then add 3.4 mL of triethylamine to neutralize, after 0.5 hours of reaction, add 130 g of deionized water under vigorous stirring to disperse, and after 0.5 hours, sodium bisulfite-capped transparent Stable aqueous polyurethane solution.

[0041] (3) Anti-wrinkle finishing:

[0042] Soak the cotton khaki twic...

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Abstract

The invention discloses an anti-wrinkle finishing agent for cotton fabrics, and a preparation method and an application thereof. The anti-wrinkle finishing agent is aqueous polyurethane which is formed by polymerizing the unit represented in the chemical structural formula (I). The preparation method includes the steps of polymerizing a polyether flexible chain segment with excessive isophorone diisocyanate, and terminating excessive isocyanate groups to prepare the terminated aqueous polyurethane. The anti-wrinkle finishing agent has very good effects on the cotton fabrics and effectively solves the problems that an anti-wrinkle finishing agent in the prior art releases formaldehyde, reduces strength of the fabrics and yellows the fabrics, and furthermore, the cotton fabric is improved in washability.

Description

technical field [0001] The invention relates to the field of preparation and application of finishing agents, in particular to an anti-wrinkle finishing agent for cotton fabrics and its preparation method and application. Background technique [0002] When the fabric is wrinkled, the fibers are bent and deformed due to external force, and cannot be completely restored to their original shape after relaxation. In places with low side order, the macromolecules are not arranged neatly. When subjected to external forces such as washing or wearing, the hydrogen bonds in the area are deformed. , and with the different hydrogen bond strengths, the bond breaks and the relative slippage of the basic structural unit occurs, and new hydrogen bonds can be generated at new positions. When the external force is removed, the system undergoes creep recovery, and when the external force is large and the time is long, the resistance generated by the newly formed hydrogen bond is greater than ...

Claims

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Application Information

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IPC IPC(8): D06M15/568C08G18/83C08G18/75C08G18/66C08G18/48C08G18/34D06M101/06
Inventor 向中林
Owner JIANGSU LIANFA TEXTILE
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