Modified cationic waterborne polyurethane color fixing agent and preparation method thereof

A water-based polyurethane and cationic technology, which can be used in dyeing, textiles and papermaking, etc., can solve the problems of poor hand feeling, achieve improved wear resistance and washability, simple preparation process, and excellent color fixing effect.

Inactive Publication Date: 2019-07-05
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Li Xinping obtained silicone-modified quaternary aminated cationic water-based polyurethane color fixing agent by introducing polyether triol and isophorone diisocyanate (IPDI), mixed polyether diol and aminosilane coupling agent KH550 to react. Although the wet rubbing fastness of the dyed fabrics treated by it is obviously improved, the hand feeling becomes worse with the increase of the amount of fixing agent (Li Xinping, Wan Guangfeng, Feng Yong, weigh. Synthesis and analysis of reactive dyes wet rubbing fastness enhancer Application [J]. Journal of Wuhan Textile University, 2013, 26(6): 14-18)

Method used

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  • Modified cationic waterborne polyurethane color fixing agent and preparation method thereof
  • Modified cationic waterborne polyurethane color fixing agent and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0024] (1) Quaternization reaction: Add 12.0 g of nitrogen methyldiethanolamine (diluted with isopropanol to a mass fraction of 30%) into a three-necked flask, mix and stir, and slowly add 11.2 g of Oxychloropropane. Then the temperature was raised to 60°C, and the reaction was stirred for 6 h to obtain a hydroxyl-terminated quaternary ammonium salt chain extender. The obtained product was washed three times with acetone, the residual solvent was distilled off under reduced pressure, and dried at 45°C and 0.09 Mpa vacuum for 24 h.

[0025] (2) Prepolymerization reaction: Add 10.5 g polyethylene glycol (Mn=1000), 4.5 g polyether glycol N210 and 0.45 g castor oil into the reactor, and heat at a constant temperature in a water bath at 90°C and a vacuum of 0.095Mpa After dehydration for 1.5 h, the moisture content was measured to be <0.1%, and 6.67 g of IPDI was added after cooling down, and reacted at 75°C for 2.5 h. Then, the temperature was lowered to 45°C and 1.08 g of hydro...

Embodiment 2

[0028] (1) Quaternization reaction: Add 12.0 g of nitrogen methyldiethanolamine (diluted with isopropanol to a mass fraction of 30%) into a three-necked flask, mix and stir, and slowly add 11.2 g of Oxychloropropane. Then the temperature was raised to 60°C, and the reaction was stirred for 6 h to obtain a hydroxyl-terminated quaternary ammonium salt chain extender. The obtained product was washed three times with acetone, the residual solvent was distilled off under reduced pressure, and dried at 45°C and 0.09 Mpa vacuum for 24 h.

[0029] (2) Prepolymerization reaction: Add 10.5 g of polyethylene glycol (Mn=1000), 7 g of polyether glycol N210 and 0.53 g of castor oil into the reactor, and heat at a constant temperature in a 90°C water bath and a vacuum of 0.095Mpa After dehydration for 1.5 h, the moisture content was measured to be <0.1%, and 6.67 g of IPDI was added after cooling down, and reacted at 75°C for 2.5 h. Then, the temperature was lowered to 45°C and 1.32 g of h...

Embodiment 3

[0032] (1) Quaternization reaction: Add 12.0 g of nitrogen methyldiethanolamine (diluted with isopropanol to a mass fraction of 30%) into a three-necked flask, mix and stir, and slowly add 13.1 g of ring Oxychloropropane. Then the temperature was raised to 60°C, and the reaction was stirred for 6 h to obtain a hydroxyl-terminated quaternary ammonium salt chain extender. The obtained product was washed three times with acetone, the residual solvent was distilled off under reduced pressure, and dried at 45°C and 0.09 Mpa vacuum for 24 h.

[0033] (2) Prepolymerization reaction: Add 10.5 g polyethylene glycol (Mn=1000), 10.5 g polyether glycol N210 and 0.84 g castor oil into the reactor, and heat at a constant temperature in a water bath at 90°C and a vacuum of 0.095Mpa After dehydration for 1.5 h, the moisture content was measured to be <0.1%, and 6.67 g of IPDI was added after cooling down, and reacted at 75°C for 2.5 h. Then, the temperature was lowered to 45°C and 1.46 g of...

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Abstract

The invention discloses a preparation method of a modified cationic waterborne polyurethane color fixing agent, and belongs to the technical field of textile color fixing agents. The preparation method comprises the following steps: (1) carrying out a quaternization reaction, (2) carrying out a reaction on a polyurethane prepolymer, and (3) carrying out an end-capping and emulsification reaction to obtain the modified cationic waterborne polyurethane color fixing agent with semitransparent appearance, blue light exhibition and solid content of 30-40%. The preparation process disclosed by invention is simple. Firstly, a part of diisocyanate groups obtained after the reaction of the polyurethane prepolymer is inactivated by using an end-cappingreagent, and then the waterborne polyurethane color fixing agent is generated by self emulsifying. The color fixing agent is applied to a color fixation post-treatment process of dyed cotton fabrics, so that the color fixation effect is good, rubbing fastness and soaping fastness are obviously improved, the color change of the dyed fabric is small, and the hand feeling is soft. Meanwhile, the prepared color fixing agent does not contain formaldehyde, so that relatively high economic benefit and environmental benefit are achieved.

Description

technical field [0001] The invention belongs to the technical field of textile color-fixing agent synthesis, and in particular relates to a cationic water-based polyurethane and a preparation method thereof. Background technique [0002] At present, cotton fabrics are mostly dyed with anionic dyes. Most of these dyes contain hydrophilic groups such as sulfonic acid groups and carboxylic acid groups, and the color fastness to wetness is poor. Therefore, the color fixing treatment of dyed fabrics is particularly necessary. In recent years, in response to the concept of green and sustainable economic development, traditional color fixing agents have been eliminated due to the release of free formaldehyde on the environment and the impact on the color change and hand feel of dyed fabrics. Research on new formaldehyde-free color fixing agents with high color fixing and low pollution Development has become the focus of attention of dyeing and finishing workers, among which water-b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/66C08G18/48C08G18/36C08G18/12C08G18/32D06P5/08
CPCC08G18/755C08G18/6696C08G18/4808C08G18/4825C08G18/4833C08G18/36C08G18/12D06P5/08C08G18/3275
Inventor 周建华赵姣姣张禹
Owner SHAANXI UNIV OF SCI & TECH
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