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Water-based polyurethane dispersion for color fixation, and preparation method and application thereof

A water-based polyurethane and dispersion technology, applied in dyeing, textile and papermaking, etc., can solve the problems of unsuitability for industrial production, poor product stability, high production costs, and achieve excellent film-forming properties, improve stability, and reduce energy consumption. Effect

Inactive Publication Date: 2017-06-27
SHANGHAI DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a color-fixing agent in order to overcome the defects of the prior art, such as the relatively complicated procedure of the preparation method of the polyurethane film-forming color-fixing agent, high production cost, poor product stability, and unsuitability for industrialized production. Aqueous polyurethane dispersion, preparation method and application thereof

Method used

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  • Water-based polyurethane dispersion for color fixation, and preparation method and application thereof
  • Water-based polyurethane dispersion for color fixation, and preparation method and application thereof
  • Water-based polyurethane dispersion for color fixation, and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0052] A kind of preparation of color-fixing water-based polyurethane dispersion, it is made by following steps:

[0053] Select polyoxypropylene ether diol (PPG1000, hydroxyl value 112 mg KOH / g, acid value 0.1 mg KOH / g) 50 g, 1,4-butanediol 2.7 g, isophorone diisocyanate (IPDI) 44 gram, dibutyltin dilaurate 0.1 gram, add above-mentioned raw material to be equipped with reflux condenser, thermometer, in the 500mL four-neck flask of stirrer, electric heating mantle heating 80 ± 5 ℃, react for 2 hours, make polyurethane prepolymer, Add 5.31 grams of triethanolamine, 60 grams of acetone, and react at a temperature of 65±5°C for 4 hours, then add 270 grams of deionized water when the temperature is lowered to below 20 degrees, adjust the speed at 1000 rpm, and emulsify for 1 hour to obtain 23% cross-linked polysaccharides with a solid content of 23%. Polyurethane dispersion, below 20 DEG C of temperature control, add 14.44 grams of diethanolamine aqueous solution with a mass conce...

Embodiment 2

[0055] A kind of preparation of color-fixing water-based polyurethane dispersion, it is made by following steps:

[0056] Select polyoxyethylene ether diol (PEG1000, hydroxyl value 112 mg KOH / g, acid value 0.15 mg KOH / g) 50 g, ethylene glycol 1.86 g, hexamethylene diisocyanate 40.3 g, dibutyltin dilaurate 0.2 g, add the above raw materials into a 500mL four-necked flask equipped with a reflux condenser, a thermometer, and a stirrer, heat with an electric heating mantle at 80±5°C, and react for 3 hours to obtain a polyurethane prepolymer. Add trimethylolpropane 5.36 gram, acetone 60 grams, temperature 65±5°C, react for 4 hours, cool down to below 20°C, add 390 grams of deionized water, adjust the speed to 1000 rpm, and emulsify for 1 hour to obtain a cross-linked polyurethane dispersion with a solid content of 18%. 18.60 grams of piperazine aqueous solution (the described mass concentration refers to the percentage of the quality of piperazine in the total mass of dipiperazine ...

Embodiment 3

[0058] A kind of preparation of color-fixing water-based polyurethane dispersion, it is made by following steps:

[0059] Select polytetramethylene glycol (PTMEG1000, hydroxyl value 112 mg KOH / gram, acid value 0.05 mg KOH / gram) 50 grams, 1,6-hexanediol 3.54 grams, toluene diisocyanate (TDI) 20.9 grams, will Add the above raw materials into a 500mL four-necked flask equipped with a reflux condenser, a thermometer, and a stirrer, heat with an electric heating mantle at 85±5°C, and react for 3 hours to prepare a polyurethane prepolymer. Add trimethylolpropane polyethylene glycol ether (TM, hydroxyl value 423 mg KOH / g, acid value 0.1-1.2 mg KOH / g) 7.56 g, THF 90 g, temperature 65±5°C, react for 4 hours, cool down to below 0°C and add 130 g of deionized water, Adjust the rotating speed to 1000 rev / min, emulsify for 1 hour to obtain a cross-linked polyurethane dispersion with a solid content of 27%, and add dropwise 1.8 grams of ethylenediamine aqueous solution with a mass concentra...

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Abstract

The invention discloses a water-based polyurethane dispersion for color fixation, and a preparation method and application thereof. The preparation method of the water-based polyurethane dispersion for color fixation comprises the following steps: 1, performing polymerization reaction on polyisocyanate, low polymer polylol and small molecule diol to obtain a polyurethane prepolymer; 2, performing crosslinking reaction on the polyurethane prepolymer and crosslinking agent in solvent to obtain crosslinked polyurethane; 3, performing dispersion and emulsification on the crosslinked polyurethane and deionized water to obtain a crosslinked polyurethane dispersion; 4, performing chain extension reaction on the crosslinked polyurethane dispersion and diamine to obtain chain-extended crosslinked polyurethane; and 5, performing termination reaction on the chain-extended crosslinked polyurethane and amino-terminated silane coupling agent to obtain the water-based polyurethane dispersion for color fixation. The preparation method disclosed by the invention is simple in process and low in energy consumption; and the prepared product has favorable film forming property and favorable color fixation property, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a water-based polyurethane dispersion for color fixing, a preparation method and an application thereof. Background technique [0002] Since many commonly used dye molecules contain water-soluble groups such as sulfonic acid groups or carboxylic acid groups, their color fastness, especially the color fastness to washing, is poor, and the binding force with the fabric is poor, and post-fixation treatment is required. Fixing agent can form insoluble salt with dye molecules, reduce dye solubility, improve water resistance and wet fastness; it can also be used as a special adhesive to form a film on the dye to prevent the dye from contacting with water: it can also be used with active groups on dyes and fibers The group reacts to form a covalent bond to generate a strong affinity, so as to achieve the color fixing effect. [0003] Water-based polyurethane (WPU) has a wide range of compatibility in the textile field, and can be use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/32C08G18/12C08G18/38D06P5/08D06P1/38D06P3/66
CPCC08G18/6674C08G18/12C08G18/3206C08G18/4238C08G18/4845C08G18/4854C08G18/664D06P1/38D06P3/008D06P3/66D06P5/08C08G18/3275C08G18/3246C08G18/3228C08G18/3893
Inventor 杨学园董建国方洇翟立杰何志强时巍平
Owner SHANGHAI DONGDA CHEM
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