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Self-repairing polyurethane, as well as textile printing coating and preparation method thereof

A printing coating and self-repairing technology, applied in textiles, papermaking, dyeing and other directions, can solve the problems of odor, poor rubbing fastness of printed fabrics, hand feeling, fastness, permeation, and difficulty in comprehensive balance of environmental protection, etc., to increase the variety , the effect of broadening the application field

Active Publication Date: 2014-08-06
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, printing paint also has some disadvantages such as poor rubbing fastness of printed fabrics, and release of peculiar smell in the operating environment.
Although countries around the world have spared no effort to improve and develop new coatings and their supporting new additives for many years, and have made great progress, it is difficult to achieve a comprehensive balance in terms of hand feel, fastness, penetration, and environmental protection.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Preparation of self-healing polyurethane emulsion:

[0044] 7.0 parts of polycaprolactone diol (number-average molecular mass: 3000), 1.3 parts of 4,4'-diphenylmethane diisocyanate (MDI), and 76.3 parts of dimethylacetamide (reverse phase component (A) ) into a reaction kettle equipped with a stirrer, a thermometer and a reflux condenser, and react at a temperature of 80-85°C for 2 hours.

[0045] Then add 0.2 parts of 2,2-dihydroxymethylpropionic acid (DMPA) and 0.4 parts of 4,4'-diphenylmethane diisocyanate (MDI), keep the original temperature unchanged, and continue the reaction for 2 hours.

[0046] Then add 0.3 parts of 1,4-butanediol and 1.6 parts of 4,4'-diphenylmethane diisocyanate (MDI), and keep the original temperature unchanged for 2 hours.

[0047] Then add 0.2 part of glycerin, keep the original temperature and react for 1 hour.

[0048] Then lower the temperature to 50-55°C, add 0.2 parts of triethylamine, control the temperature at 50-55°C for 0.5 ...

Embodiment 2

[0057] (1) Preparation of self-healing polyurethane emulsion Preparation:

[0058] Add 4.5 parts of polycaprolactone diol (number-average molecular weight: 3000), 1.7 parts of 4,4'-diphenylmethane diisocyanate (MDI), and 55.8 parts of dimethylacetamide into the In the reactor of the condenser, react at a temperature of 80-85° C. for 2 hours.

[0059] Add 0.3 parts of 2,2-dihydroxymethylpropionic acid (DMPA) and 0.5 parts of 4,4'-diphenylmethane diisocyanate (MDI), and keep the original temperature unchanged for 2 hours.

[0060] Then add 0.4 parts of 1,4-butanediol and 2.1 parts of 4,4'-diphenylmethane diisocyanate (MDI), and keep the original temperature unchanged for 2 hours.

[0061] Add 0.3 parts of glycerin, and keep the original temperature unchanged for 1 hour reaction.

[0062] Then lower the temperature to 50-55°C, add 0.2 parts of triethylamine, control the temperature at 50-55°C for 0.5 hours, add 34.2 parts of deionized water to adjust the viscosity, and obtain a...

Embodiment 3

[0071] (1) Preparation of self-healing polyurethane emulsion:

[0072] In parts by weight, 3.5 parts of polycaprolactone diol (number-average molecular mass: 3000), 1.9 parts of 4,4'-diphenylmethane diisocyanate (MDI), and 49.5 parts of dimethylacetamide were added with stirring In a reaction kettle with a thermometer, a thermometer and a reflux condenser, react at a temperature of 80 to 85°C for 2 hours.

[0073] Add 0.3 parts of 2,2-dihydroxymethylpropionic acid (DMPA) and 0.6 parts of 4,4'-diphenylmethane diisocyanate (MDI), and keep the original temperature unchanged for 2 hours.

[0074] Then add 0.5 parts of 1,4-butanediol and 2.4 parts of 4,4'-diphenylmethane diisocyanate (MDI), and keep the original temperature unchanged for 2 hours.

[0075] Add 0.3 parts of glycerin, and keep the original temperature unchanged for 1 hour reaction.

[0076] Cool down to 50-55°C, add 0.3 parts of triethylamine, control the temperature at 50-55°C and react for 0.5 hours, add 40.7 part...

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Abstract

The invention relates to the technical field of textile coatings and discloses a self-repairing polyurethane emulsion. The self-repairing polyurethane is hydrophilic group block polyurethane composed of a fixing phase and a reversible phase, wherein the molecular weight of the self-repairing polyurethane is 10,000-50,000; the fixing phase has a glass-transition temperature or a crystallization melting temperature higher than 100 DEG C; the reversible phase has a shape change recovery temperature ranging from minus 10 DEGC to 60 DEG C. The self-repairing polyurethane emulsion can be used for manufacturing textile printing coating, wherein the self-repairing of the printing coating is less than or equal to 5 mm, the shape change fixed rate is less than or equal to 30%, and the shape change recovery rate is greater than or equal to 90%; the shape change recovery temperature of the reversible phase ranges from minus 10 DEGC to 60 DEG C.

Description

technical field [0001] The invention belongs to the technical field of textile coatings, in particular to a self-repairing textile printing coating and a preparation method thereof. Background technique [0002] The development of printing paint is very rapid, occupying an increasing proportion in the garment industry. The process of printing paint is simple, energy saving, no waste water discharge, complete color spectrum, convenient color matching and copying, clear printing outline, high authenticity rate, strong reproducibility, and generally good light fastness. In recent years, many new materials can be used in the pigment printing process, especially with the development of synthetic fibers and their blended fabrics, the superiority and importance of printing pigments are more prominent. However, printing paint also has disadvantages such as poor rubbing fastness of some printed fabrics, and release of peculiar smell in the operating environment. Although countries ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/32D06P1/52
CPCC08G18/0823C08G18/12C08G18/3206C08G18/348C08G18/6677D06P1/5285
Inventor 刘岩雪蒙罗尊燕朋张宏刚辛斌杰宣莹
Owner SHANGHAI UNIV OF ENG SCI
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