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Preparation method of quaternary ammonium salt chitosan and organic silicon composite modified cationic water-based polyurethane fixing agent

A technology of quaternary ammonium chitosan and water-based polyurethane, which is applied in dyeing, textiles and papermaking, and can solve problems such as poor thermal stability, poor water resistance, and poor gloss, and achieve no effect on color and good hand feeling Effect

Active Publication Date: 2014-04-09
FUJIAN QINGYUAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since most of the raw materials for waterborne polyurethane synthesis are bifunctional compounds, and ionic groups are grafted during the synthesis process, pure waterborne polyurethane has disadvantages such as poor water resistance, poor thermal stability and poor gloss after film formation.

Method used

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  • Preparation method of quaternary ammonium salt chitosan and organic silicon composite modified cationic water-based polyurethane fixing agent
  • Preparation method of quaternary ammonium salt chitosan and organic silicon composite modified cationic water-based polyurethane fixing agent
  • Preparation method of quaternary ammonium salt chitosan and organic silicon composite modified cationic water-based polyurethane fixing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of preparation method of quaternary ammonium salt chitosan and organosilicon compound modified cationic water-based polyurethane color fixing agent, comprises the following steps:

[0028] Add 20.0 g of polyoxypropylene diol (N220) into the reaction vessel, mix and stir, heat at a constant temperature in an oil bath at 90°C, vacuumize and dehydrate for 1 h, the vacuum degree is 0.098MPa, cool down to 80°C, and add 11.1 g of IPDI , 1.94 g of hydroxypropyltrimethylammonium chloride chitosan and 0.15 g of di-n-butyltin dilaurate, and 1.2 g of nitrogen-methyl glycol amine (diluted with acetone to a mass fraction of 35%) was added dropwise until the system The prepolymer was obtained when the NCO value basically reached the theoretical value. The theoretical R value was 1.56. Then the temperature was lowered to 60°C, and 1.55 g of 3-aminopropyltrimethoxysilane (KH540) was added. After the end-capping reaction was complete, the theoretical R The value is 1.20. Cool th...

Embodiment 2

[0033] A kind of preparation method of quaternary ammonium salt chitosan and organosilicon compound modified cationic water-based polyurethane color fixing agent, comprises the following steps:

[0034]Add 20.0 g of polyoxypropylene diol (N220) into the reaction vessel, mix and stir, heat at a constant temperature in an oil bath at 90°C, and vacuum dehydrate for 1 h with a vacuum degree of 0.098 MPa. Cool down to 80°C, add 11.1 g IPDI, 1.29 g carboxymethylhydroxypropyltrimethylammonium chloride chitosan and 0.15 g di-n-butyltin dilaurate, drop 1.2 g nitrogen-methyl glycol amine (with Diluted with acetone to 35% by mass), until the NCO value in the system basically reached the theoretical value, the prepolymer was obtained, and the theoretical R value was 1.78, then the temperature was lowered to 60°C, and γ-aminopropyltriethoxysilane ( KH550) 1.89 g, with a complete capping reaction and a theoretical R value of 1.20. Cool the oil bath to 40°C, dilute with acetone (about 3-5 g...

Embodiment 3

[0039] A kind of preparation method of quaternary ammonium salt chitosan and organosilicon compound modified cationic water-based polyurethane color fixing agent, comprises the following steps:

[0040] Add 20.0 g of polyoxypropylene diol (N220) into the reaction vessel, mix and stir, heat at a constant temperature in an oil bath at 90°C, and vacuum dehydrate for 1 h with a vacuum degree of 0.098 MPa. Cool down to 80°C, add 11.1 g IPDI, 0.81 g hydroxypropyltrimethylammonium chloride chitosan and 0.15 g di-n-butyltin dilaurate, dropwise add 1.2 g nitrogen-methyl glycol amine (diluted with acetone to The mass fraction is 35%), until the NCO value in the system basically reaches the theoretical value, the prepolymer is obtained, the theoretical R value is 2.00, then the temperature is lowered to 60°C, and N-β-(aminoethyl)-γ-aminopropyl is added 2.15 g of methyldimethoxysilane (KH602), with a complete capping reaction, and a theoretical R value of 1.20. Cool the oil bath to 40°C,...

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Abstract

The invention relates to the technical field of fixing agent, and provides a preparation method of quaternary ammonium salt chitosan and organic silicon composite modified cationic water-based polyurethane fixing agent. When being used for a fixing aftertreatment process of textile printing and dyeing, the fixing agent prepared through the method can effectively enhance dry / wet rubbing color fastness of textile. The preparation method mainly comprises the following steps: (1) performing quaternary ammonium salt chitosan modified polyurethane prepolymer reaction; (2) performing organic silicon terminating reaction; and (3) neutralizing, and performing ionizing reaction.

Description

technical field [0001] The invention relates to the technical field of color-fixing agents, in particular to a preparation method of a quaternary ammonium salt chitosan and organic silicon composite modified cationic water-based polyurethane color-fixing agent. Background technique [0002] After cotton fabrics are dyed with anionic dyes, they usually undergo color fixing treatment to improve their color fastness to wet treatment. Traditional color fixing agents have been eliminated due to free formaldehyde, and new formaldehyde-free color fixing agents are emerging. The use of different color fixing agents can improve the color fastness of different types of dyes on fabrics. When using general formaldehyde-free color fixing agents, it is still very difficult to improve the wet rubbing fastness above level 3. [0003] Polyurethane is a type of color-fixing agent that has attracted more attention in recent years. Water-based polyurethane color-fixing agent refers to a polyur...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/64C08G18/38C08G18/12D06P5/08
CPCC08G18/0814C08G18/12C08G18/4081C08G18/6484C08G18/6688D06P5/08C08G18/3893
Inventor 郑福尔刘剑锋陈珍喜张彩群刘明华沈立新
Owner FUJIAN QINGYUAN TECH
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