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Preparation method of organic silicon modified cationic waterborne polyurethane

A water-based polyurethane and cationic technology, which is applied in the chemical industry to achieve the effects of improved heat resistance, low cohesive energy density, and good hand feeling

Inactive Publication Date: 2013-04-10
QINGDAO WINCHANCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a reactive resin, its disadvantage is that the fabric will become poor, stiff and stiff after finishing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Prepolymer was prepared from toluene diisocyanate (TDI), polyether diol (N220), and hydroxyl-modified silicone oil, and reacted for 2 hours. The molar ratio of TDI to N220 is 1.3:1, and the hydroxyl-modified silicone oil accounts for 20% of the mass of the prepolymer. Add the blocking agent methyl ethyl ketone oxime to block the prepolymer, and react for 50 minutes. The ratio of the amount of substance of methyl ethyl ketoxime to the amount of substance of excess -NCO was 0.35. Cool down to 40°C, add glacial acetic acid and stir, and react for 3 minutes. The amount of substance of glacial acetic acid is the same as that of methyl ethyl ketone oxime. Add water for emulsification for 60 minutes, and the amount of water used is twice the total mass of the prepolymer. A silicone-modified cationic water-based polyurethane emulsion is obtained.

Embodiment 2

[0020] Prepolymer was prepared from toluene diisocyanate (TDI), polyether diol (N220), and hydroxyl-modified silicone oil, and reacted for 2 hours. The molar ratio of TDI to N220 was 1.35:1, and the hydroxyl-modified silicone oil accounted for 22% of the mass of the prepolymer. Add the blocking agent methyl ethyl ketone oxime to block the prepolymer, and react for 50 minutes. The ratio of the amount of substance of methyl ethyl ketoxime to the amount of substance of excess -NCO was 0.35. Cool down to 40°C, add glacial acetic acid and stir, and react for 3 minutes. The amount of substance of glacial acetic acid is the same as that of methyl ethyl ketone oxime. Add water for emulsification for 60 minutes, and the amount of water used is twice the total mass of the prepolymer. A silicone-modified cationic water-based polyurethane emulsion is obtained.

Embodiment 3

[0022] Prepolymer was prepared from toluene diisocyanate (TDI), polyether diol (N220), and hydroxyl-modified silicone oil, and reacted for 2 hours. The molar ratio of TDI to N220 is 1.4:1, and the hydroxyl-modified silicone oil accounts for 25% of the mass of the prepolymer. Add the blocking agent methyl ethyl ketone oxime to block the prepolymer, and react for 50 minutes. The ratio of the amount of substance of methyl ethyl ketoxime to the amount of substance of excess -NCO was 0.35. Cool down to 40°C, add glacial acetic acid and stir, and react for 3 minutes. The amount of substance of glacial acetic acid is the same as that of methyl ethyl ketone oxime. Add water for emulsification for 60 minutes, and the amount of water used is twice the total mass of the prepolymer. A silicone-modified cationic water-based polyurethane emulsion is obtained.

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PUM

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Abstract

The invention discloses a preparation method of organic silicon modified cationic waterborne polyurethane. The method comprises the following steps of: preparing a prepolymer by using TDI, N220 and hydroxyl modified silicone oil as raw materials, adding methyl ethyl ketoxime as a sealing agent, adding glacial acetic acid, stirring, and adding right amount of deionized water to obtain the organic silicon modified cationic waterborne polyurethane emulsion. After being filmed, the waterborne polyurethane feels comfortable, and is high in water resisting property and cohesive property.

Description

technical field [0001] The invention relates to a preparation method of organosilicon-modified cationic waterborne polyurethane, which belongs to the field of chemical industry. technical background [0002] With the enhancement of people's awareness of environmental protection and the environmental protection legislation of governments of various countries. Water-based polyurethane is gradually replacing solvent-based polyurethane as an important direction of polyurethane industry swelling. At present, water-based polyurethane has been successfully used in the textile printing and dyeing industry. Closed waterborne polyurethane, as a special type of internal crosslinked waterborne polyurethane, has special performance and broad application prospects, and has attracted extensive attention from domestic and foreign researchers. However, as a reactive resin, its disadvantage is that the fabric will become poor, stiff and stiff after finishing. [0003] Because the main cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/61C08G18/48C08G18/12
Inventor 苏建丽
Owner QINGDAO WINCHANCE TECH
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