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Anionic and nonionic mixed aqueous polyurethane dispersion body and preparation method thereof

A water-based polyurethane and non-ionic technology, applied in the field of polymer resin, can solve the problems of poor water resistance of mixed water-based polyurethane dispersion, poor water resistance of sulfonate, poor water resistance, etc., and achieve excellent mechanical properties, dispersion Easy, evenly distributed effect

Inactive Publication Date: 2018-02-23
HEFEI KETIAN WATERBORNE TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water resistance of the sulfonate itself is very poor, and the mixed waterborne polyurethane dispersion with this structure has poor water resistance
The dispersion prepared according to the method announced by the patent CN104910343A also has the disadvantage of poor water resistance

Method used

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  • Anionic and nonionic mixed aqueous polyurethane dispersion body and preparation method thereof
  • Anionic and nonionic mixed aqueous polyurethane dispersion body and preparation method thereof
  • Anionic and nonionic mixed aqueous polyurethane dispersion body and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Take by weighing 120g polypropylene oxide (PPG3000, relative molecular mass is 3000) and 20g double-terminated hydroxyl polyethylene oxide (relative molecular mass is 1000), put into reactor, add 40g diphenylmethane diisocyanate under stirring , keep the temperature at 85°C, and stir for 2 hours. Cool down to 50°C, add 3g of dimethylolpropionic acid (DMPA), 2g of trimethylolpropane, raise the temperature to 70°C, and keep stirring at 70°C for 4 hours to prepare a waterborne polyurethane prepolymer.

[0039] Cool the water-based polyurethane prepolymer to 5°C, add 1.5g of triethylamine, stir for 10 minutes, then transfer to a high-speed emulsifier, add 300g of deionized water at a speed of 1400r / min, and slowly add 4g of ethylamine after phase transition Diamine post-chain extender to prepare anionic and nonionic mixed waterborne polyurethane dispersions.

Embodiment 2

[0041] Take by weighing 160g polypropylene oxide (PPG3000, relative molecular mass is 3000) and 15g double-terminated hydroxyl polyethylene oxide (relative molecular mass is 1500), put into reactor, add 35g isophorone diisocyanate under stirring , keep the temperature at 90°C, and stir for 2 hours. Cool down to 50°C, add 2.5g DMPA, 1.5g butylene glycol, and 2g trimethylolpropane, raise the temperature to 70°C, and keep stirring at 70°C for 5 hours to prepare a waterborne polyurethane prepolymer.

[0042] Cool the water-based polyurethane prepolymer to 30°C, add 1.25g of triethylamine, stir for 10 minutes, then transfer to a high-speed emulsifier, add 400g of deionized water at a speed of 1400r / min, and slowly add 3.6g after phase transition Ethylenediamine post-chain extender to prepare anionic and nonionic mixed waterborne polyurethane dispersions.

Embodiment 3

[0044] Weigh 100g polytetrahydrofuran diol (PTMEG2000, relative molecular mass is 2000) and 10g double-terminated hydroxyl polyethylene oxide (relative molecular mass is 800), put them into the reactor, add 30g toluene diisocyanate, 5g six methylene diisocyanate, keep the temperature at 85°C, and stir for 2 hours. Cool down to 50°C, add 3.2g DMPA, 2g cyclohexanedimethanol, and 1g trihydroxypropane, raise the temperature to 70°C, and keep stirring at 75°C for 5 hours to prepare a water-based polyurethane prepolymer.

[0045] Cool the water-based polyurethane prepolymer to 10°C, add 1.62g of triethylamine, stir for 10 minutes, then transfer to a high-speed emulsifier, add 320g of deionized water at a speed of 1400r / min, slowly add 6g of iso Fluorone diamine post-chain extender to prepare anionic and nonionic mixed waterborne polyurethane dispersions.

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Abstract

The present invention provides an anionic and nonionic mixed aqueous polyurethane dispersion body and a preparation method thereof, wherein the raw material components comprise, by weight, 80-150 parts of macromolecule polyol, 35-50 parts of isocyanate, 10-20 parts of dihydroxyl polyethylene oxide, 2-4 parts of a carboxylic acid type hydrophilic chain extender, 2-5 parts of a neutralizing agent, 2-10 parts of a small molecule polyol chain extender, and 2-10 parts of a small molecule amine post chain extender. According to the present invention, the organic solvent is not required to be added during the preparation of the aqueous polyurethane dispersion body, such that the environmental pollution can be avoided; the main chain of the prepared anionic and nonionic mixed aqueous polyurethanedispersion body contains the Y-shaped side chain non-ionic hydrophilic component, such that the aqueous polyurethane dispersion body has the uniformly-distributed hydrophilic chains, and further has advantages of excellent performance and improved stability; and the side chain of the aqueous polyurethane dispersion body contains the carboxylic acid type hydrophilic component so as to optimize thewater resistance of the aqueous polyurethane dispersion body.

Description

technical field [0001] The invention relates to the technical field of polymer resins, and specifically discloses an anionic and nonionic mixed water-based polyurethane dispersion and a preparation method thereof. Background technique [0002] At present, water-based polyurethane dispersions are basically prepared by the internal emulsification process. A hydrophilic chain extender is introduced into the polyurethane resin structure to make the polyurethane resin hydrophilic, and then dispersed in water at a high speed to prepare a water-based polyurethane dispersion. Water-based polyurethane dispersions use water as the dispersion medium, are safe, environmentally friendly and non-toxic, and are widely used in synthetic leather, textile coatings and adhesives. [0003] At present, there are two types of waterborne polyurethane dispersions: ionic and nonionic. Compared with non-ionic type, ionic waterborne polyurethane dispersion has excellent heat resistance, relatively go...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/34C08G18/32C08G18/12C09D175/08C09D175/06
CPCC08G18/6692C08G18/12C08G18/3206C08G18/3212C08G18/3228C08G18/3234C08G18/348C08G18/4018C08G18/42C08G18/4238C08G18/4804C08G18/4808C08G18/4833C08G18/4854C08G18/6625C09D175/06C09D175/08
Inventor 戴家兵郑广鹏王浩志严正祥
Owner HEFEI KETIAN WATERBORNE TECH CO LTD
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