Anti-pilling finishing agent for pure cotton knitted fabrics and preparation method thereof

An anti-pilling and pilling agent technology, used in fiber processing, textiles and papermaking, etc., can solve the problems of poor yellowing resistance and water resistance, one-sided research theory, high baking temperature, etc. Uniform distribution and good dispersion

Inactive Publication Date: 2009-09-30
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic water-soluble polyurethane started late, and began to develop slowly in the late 1970s. Most of the raw materials used were aromatic isocyanate-type polyurethanes, and there were few studies on aliphatic or alicyclic isocyanate-type water-based polyurethanes. The research theory is also relatively one-sided. Although the fabrics finished with water-based polyurethane have been greatly improved, their yellowing resistance and water resistance are poor, their solid content is low, and they require higher baking temperatures during baking. Wait

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Preparation of a water-based polyurethane finishing agent solution with a solid content of 35.0 ± 2.0%

[0025] A preparation method of an anti-pilling finishing agent for pure cotton knitted fabrics of the present invention adopts the following process steps: the formula ratio is calculated in parts by weight:

[0026] Preparation of water-based polyurethane solution: Add 2 parts of melamine to a four-necked flask, 13 parts of isophorone, mix well and heat up to 50°C, slowly add 7 drops / minute to the solution with 7 Dissolve 23 parts of isophorone diisocyanate in 1 part of isopropanol for 1.5 hours, and stir for 2 hours, then add 0.03 parts of dibutyltin dilaurate as a catalyst, raise the temperature to 80°C, and react for 4 hours; the prepared prepolymer Cool the solution to 70°C, slowly drop in the remaining 7 parts of solvent isopropanol to reduce the viscosity of the prepolymer, which is beneficial to the subsequent capping reaction; continue to lower th...

Embodiment 2

[0034] A preparation method of an anti-pilling finishing agent for pure cotton knitted fabrics of the present invention adopts the following process steps: the formula ratio is calculated in parts by weight:

[0035] Preparation of water-based polyurethane solution: Add 2.5 parts of melamine to a four-necked flask, add 15 parts of isophorone, mix well and heat up to 60°C, slowly add 9 Dissolve 24 parts of isophorone diisocyanate in 1 part of isopropanol for 2 hours, and stir for 1.5 hours, then add 0.04 parts of dibutyltin dilaurate as a catalyst, raise the temperature to 85°C, and react for 4.5 hours; the prepared prepolymer Cool the temperature of the prepolymer solution to 65°C, slowly drop in the remaining 6 parts of solvent isopropanol to reduce the viscosity of the prepolymer, which is beneficial to the subsequent end-capping reaction; continue to lower the temperature of the prepolymer solution to 3°C, and slowly drop in saturated sulfurous acid Sodium hydrogen solution...

Embodiment 3

[0037] A preparation method of an anti-pilling finishing agent for pure cotton knitted fabrics of the present invention adopts the following process steps: the formula ratio is calculated in parts by weight:

[0038]Preparation of water-based polyurethane solution: Add 3 parts of melamine to a four-neck flask, add 16 parts of isophorone, mix well and heat up to 55°C, slowly add 8 drops in the solution at a speed of 6 drops / min Dissolve 23 parts of isophorone diisocyanate in 1 part of isopropanol for 1.6 hours, and stir for 1.8 hours, then add 0.05 parts of dibutyltin dilaurate as a catalyst, raise the temperature to 90°C, and react for 5 hours; the prepared prepolymer Cool the temperature of the prepolymer solution to 60°C, slowly drop in the remaining 8 parts of solvent isopropanol to reduce the viscosity of the prepolymer, which is beneficial to the subsequent end-capping reaction; continue to lower the temperature of the prepolymer solution to 0°C, and slowly drop in saturat...

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PUM

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Abstract

The invention relates to an anti-pilling finishing agent for pure cotton knitted fabrics and a preparation method thereof, in particular to the technical field of printing and dyeing accessory ingredients applied to spinning. The preparation method of the anti-pilling finishing agent for pure cotton knitted fabrics is characterized by adding melamine and isophorone in a container for heating and stirring, dripping mixed solution using isopropanol to dissolve isophorone diisocyanate, then adding catalyst to heat and mix evenly, adding the isopropanol, end-capping reagent, accelerant and water after cooling to sufficiently react, then rising the temperature to the normal temperature, and obtaining the anti-pilling finishing agent by continuously stirring. The anti-pilling finishing agent for pure cotton knitted fabrics is a novel printing and dyeing accessory ingredient and is lemon-yellow or water white solution which applies polyurethane on textile fibers by a lower baking temperature technology, thereby further expanding the application field of waterborne polyurethane in fabrics: the anti-pilling finishing agent has water-solubility, small grain diameter, even distribution, yellow-stain resistance, long storage period, no easy yellowing fabrics, good dispersivity by taking water as solvent without being dissolved by organic solvent, environment protection, favorable environment compatibility and no environment pollution.

Description

technical field [0001] The invention relates to an anti-pilling finishing agent for pure cotton knitted fabrics and a preparation method thereof, in particular to the technical field of application of printing and dyeing auxiliaries in textiles. Background technique [0002] During the processing, wearing and washing of pure cotton knitted fabrics, due to the friction between the fabrics or between the fabrics and other objects, a lot of fluff will be produced on the surface. The appearance and feel become worse, which affects its wearing performance. There are many ways to solve this problem, such as fiber modification, changing the cross-sectional shape of fibers and fabric structure, and resin finishing, etc. Among them, resin finishing is a more effective way to improve fabric anti-pilling, and environmentally friendly additives are especially It is water-based polyurethane that has shown good development prospects in this regard in recent years. [0003] Water-based p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/564C08G18/76C08G18/10C08G18/32
Inventor 王树根苏开第范雪荣田秀枝李焕
Owner JIANGNAN UNIV
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