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Method for preparing polyurethane macromolecule dispersing agent for pigment printing paste of fabric

A polymer dispersant and pigment printing technology, applied in textiles, papermaking, dyeing, etc., can solve the problems of polyurethane polymer dispersants that have not yet been seen, and achieve improved anti-flocculation, strong affinity, and good compatibility Effect

Inactive Publication Date: 2010-08-18
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But so far, there are no related literature reports about polyurethane polymer dispersants for textile pigment printing pastes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) According to the NCO / OH molar ratio of 2, under the protection of nitrogen, add 71.35g HDI and 48.42g BPA (dissolved in 30g DMF) into a three-necked flask equipped with a stirrer, and heat up to 75°C for 60min;

[0034] (2) Cool down to 70°C, ① add 14.23g DMPA (26gDMF dissolved) dropwise, add 0.115g dibutyltin dilaurate after the dropwise addition, and perform chain extension reaction for 60min; heat up to 75°C, ② drop 7.11gDMPA (13gDMF dissolved) , carry out the chain extension reaction for 60min; ③ add 3.56gDMPA (7gDMF solution) dropwise, and carry out the second chain extension reaction for 60min; ) for capping, the reaction time is 120min, and the temperature is 75°C;

[0035] (3) Cool down to 50°C, slowly add 11.87g Na dissolved in 50ml water dropwise 2 CO 3 solution, while neutralizing and emulsifying until Na 2 CO 3 After adding all of it, add 100ml of water, raise the temperature to 60°C and continue stirring and emulsifying for 30min.

Embodiment 2

[0037] (1) According to the NCO / OH molar ratio of 2, under the protection of nitrogen, add 70.51g HDI and 47.85g BPA (dissolved in 30g DMF) into a three-necked flask equipped with a stirrer, and raise the temperature to 75°C for 60min;

[0038] (2) Cool down to 70°C, ① add 14.06g DMPA (dissolved in 26gDMF) dropwise, add 0.115g of dibutyltin dilaurate after the dropwise addition, and perform chain extension reaction for 60min; heat up to 75°C, ② add 7.03gDMPA (dissolved in 13gDMF) dropwise , chain extension reaction for 60 minutes; ③ dropwise adding 3.52g DMPA (7gDMF solution), chain extension reaction 60min; ④ dropwise adding 7.03gDMPA (13gDMF solution), capping reaction 120min, temperature 75°C;

[0039] (3) Cool down to 50°C, slowly add 12.51g Na2CO3 solution dissolved in 50ml of water dropwise, and emulsify while neutralizing, until all Na2CO3 is added, then add 50ml of water, heat up to 60°C and continue to stir and emulsify for 30min.

Embodiment 3

[0041] (1) According to the NCO / OH molar ratio of 2, under the protection of nitrogen, add 68.9g HDI and 46.75g BPA (dissolved in 30gDMF) into a three-necked flask equipped with a stirrer, and heat up to 75°C for 60min;

[0042](2) Cool down to 70°C, ① add 13.74g DMPA (dissolved in 26gDMF) dropwise, add 0.115g of dibutyltin dilaurate after the dropwise addition, and perform the chain extension reaction for 60min; raise the temperature to 75°C, ② add 6.87gDMPA (dissolved in 13gDMF) dropwise , chain extension reaction for 60 minutes; ③ dropwise adding 13.74g DMPA (26gDMF solution), capping reaction for 120min, temperature 75°C;

[0043] (3) Cool down to 50°C, slowly add 13.59g Na2CO3 solution dissolved in 50ml of water dropwise, and emulsify while neutralizing, until all Na2CO3 is added, then add 50ml of water, raise the temperature to 60°C and continue to stir and emulsify for 30min.

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Abstract

The invention relates to a method for preparing a polyurethane macromolecule dispersing agent for pigment printing paste of a fabric, which comprises the following steps of: dissolving diisocyanate and hydrophilic carboxyl diatomic alcohol into an organic solvent and heating to 75 DEG C for reacting for 60 minutes; then dropwise adding a micromolecule diatomic alcohol solution in batch and carrying out multi-chain extension reaction for 60 minutes; after the chain extension reaction is finished, carrying out end sealing reaction for 120 minutes; cooling to 50 DEG C, dropwise adding a Na2CO3 solution and emulsifying during neutralization; and after the dropwise addition is finished and adding water for heating to 60 DEG C, continuously stirring and dissolving for 30 minutes to prepare the polyurethane macromolecule dispersing agent. The macromolecule dispersing agent has stronger affinity on the surface of pigment particles, difficult desorption, good flocculation resistance, simple preparation method, low cost and environmental protection; and the pigment paste prepared by the dispersing agent has high stability and can obtain high printing dry and wet friction fastness by being used for the printing processing of the fabric.

Description

technical field [0001] The invention belongs to the field of preparation of polymer dispersants, in particular to a preparation method of polyurethane polymer dispersants for textile paint printing paste. Background technique [0002] In the textile pigment printing process, the color paste plays a role in adjusting the color; at the same time, the particle size and uniformity of the pigment play an important role in the fastness of the pigment printing. The production of paint color paste is the pulverization and dispersion process of organic pigments, that is, before the pigments are used, physical or chemical methods must be adopted to make the pigment particles finer, control the pigment particle size within the required particle size range, and achieve stable dispersion the goal of. [0003] The simplest and most effective method of pigment dispersion is ball milling. A dispersant must be added during the ball milling process. The dispersant is a surface active substan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/52C08G18/34C08L75/04
Inventor 闵洁刁正平葛媛李娜潘建君
Owner DONGHUA UNIV
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