A kind of suede color fixing agent and its preparation method and application

A color-fixing agent and a technology for suede leather, applied in the field of suede-color-fixing agent and its preparation, can solve the problem that the color-fixing agent contains toxic solvents, the PU leather has poor dry rubbing fastness and wet rubbing fastness, and poor stability. and other problems, to achieve the effect of obvious color fixing effect, improving color fastness and excellent friction resistance.

Active Publication Date: 2021-09-17
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects such as poor dry rubbing fastness and wet rubbing fastness of PU leather dyed with neutral dyes, poor stability of water-based polyurethane color fixing agent itself and toxic solvent contained in the color fixing agent, the invention provides a method that does not use organic solvents. , Environmentally friendly green anionic hybrid crosslinking modified water-based polyurethane neutral dye fixing agent and its preparation method and use

Method used

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  • A kind of suede color fixing agent and its preparation method and application
  • A kind of suede color fixing agent and its preparation method and application
  • A kind of suede color fixing agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Prepolymerization reaction: place 2.6g of toluene diisocyanate and 20g of polytetrahydrofuran diol on water-absorbing molecular sieves for dehydration and drying for 24 hours, put them into a three-necked flask after dehydration, mix well, and heat up to 75°C for 3 hours;

[0041] (2) Chain extension reaction: Add 0.34 g of dimethylolpropionic acid, keep stirring at 75° C. for 1 h.

[0042] Then, 0.21 g of diethylene glycol was added to the reaction system, and the reaction temperature was lowered from 75° C. to 35° C. and the reaction was stirred to obtain a polyurethane prepolymer;

[0043] (3) Neutralization and ionization: at a temperature of 35 to 50°C, add 0.25 g of triethylamine to the polyurethane prepolymer obtained in step (2) and stir for 15 minutes to obtain an anionic polyurethane prepolymer;

[0044] (4) Crosslinking reaction: after neutralization and ionization, lower the temperature to room temperature, add 0.44g of silicon-containing crosslinking ag...

Embodiment 2

[0047] (1) Prepolymerization reaction: place 4.2g of hexamethylene diisocyanate and 10g of polyethylene glycol on water-absorbing molecular sieves for dehydration and drying for 24 hours, put them into a three-necked flask after dehydration, mix well, and heat up to 80°C for 2 hours;

[0048] (2) Chain extension reaction: Add 0.28 g of dimethylol butyric acid, keep stirring at 80° C. for 1 h.

[0049] Then, 1.25g of diethylene glycol was added to the reaction system, and the reaction temperature was lowered from 80°C to 40°C and stirred for reaction to obtain a polyurethane prepolymer;

[0050](3) Neutralization and ionization: add 0.19g triethylamine to the polyurethane prepolymer obtained in step (2) and stir and neutralize for 20min to obtain anionic polyurethane prepolymer;

[0051] (4) Cross-linking reaction: neutralization and ionization are completed, the temperature is lowered to room temperature, and 0.11 g of aziridine is added to stir and react for 1 hour to obtain ...

Embodiment 3

[0054] (1) Prepolymerization reaction: 6.67g of isophorone diisocyanate and 20.15g of polyethylene adipate diol were placed in a water-absorbing molecular sieve for dehydration and drying for 24 hours, and after dehydration, they were put into a three-necked flask, and after mixing evenly, Raise the temperature to 85°C for 1.5h;

[0055] (2) Chain extension reaction: add 0.67 g of dimethylolpropionic acid, keep stirring at 85° C. for 1 h.

[0056] Then, 1.5 g of diethylene glycol was added to the reaction system, and the reaction temperature was lowered from 85° C. to 50° C. and the reaction was stirred to obtain a polyurethane prepolymer;

[0057] (3) Neutralization and ionization: add 0.5g triethylamine to the polyurethane prepolymer obtained in step (2) and stir and neutralize for 10min to obtain anionic polyurethane prepolymer;

[0058] (4) Cross-linking reaction: neutralization and ionization are completed, the temperature is lowered to room temperature, 0.14 g of epichl...

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Abstract

The invention discloses a color-fixing agent for suede leather, a preparation method and application thereof, and belongs to the field of fabric finishing. The color fixing agent prepared by the method is applied to the post-treatment process of fabric printing and dyeing, and can effectively improve the color fastness to dry and wet rubbing of the fabric. Suede color fixing agent is made of diisocyanate, polymer polyol, anionic hydrophilic chain extender, small molecule chain extender, alkali neutralizer, crosslinking agent, through prepolymerization reaction, chain extension reaction, neutralization Ionization, crosslinking reaction and emulsification reaction to obtain an anionic mixed crosslinking modified water-based polyurethane neutral dye fixing agent. The color-fixing agent prepared by the invention does not contain formaldehyde, no organic solvent is used in the production process, the product does not contain toxic solvents, is environmentally friendly, has good stability, excellent friction resistance, obvious color-fixing effect, and the synthesis process is simple, the time is short, and the Low energy consumption is conducive to large-scale industrial production and promotion.

Description

technical field [0001] The invention relates to the field of finishing of suede fabrics, in particular to a color fixing agent for suede and its preparation method and application. Background technique [0002] After the suede fabric is dyed with a dye, it needs to be finished with a color fixing agent to improve the wet fastness of the suede dyed fabric. With the enhancement of environmental protection awareness and the world textile market, new requirements have been put forward for the color fastness of suede dyed fabrics. For example, Eco-Tex and Oeko-Tex standards require the color fastness of suede dyed fabrics to reach Level 3 to 4. Traditional color fixing agents are easy to cause discoloration and rough hand feeling of suede dyed fabrics, especially the high formaldehyde content, which is irritating and toxic to the skin. In recent years, there are more and more color-fixing agent products on the market, but there are still many problems. For example, most color-f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P5/08C08G18/10C08G18/32C08G18/34C08G18/42C08G18/48C08G18/73C08G18/75C08G18/76C08G18/66C08J3/24C08L75/06C08L75/08
CPCC08G18/0823C08G18/10C08G18/3206C08G18/348C08G18/4238C08G18/4833C08G18/4854C08G18/6659C08G18/6692C08G18/73C08G18/755C08G18/7614C08J3/24C08J2375/06C08J2375/08D06P5/08C08G18/32C08G18/34
Inventor 刘振波魏范梅
Owner YANTAI UNIV
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