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Nano silica-modified waterborne polyurethane emulsion, and preparation method and use thereof

A nano-silica, water-based polyurethane technology, applied in polyurea/polyurethane coatings, coatings, fireproof coatings, etc., can solve the problems of triethylamine volatilization, poor friction resistance, insufficient hardness, etc., and achieve high temperature resistance, transparency, Excellent peelability, effect of solving triethylamine VOC problem

Active Publication Date: 2019-01-15
优美特(北京)环境材料科技股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this scheme mainly uses triethylamine as a neutralizing agent, and there is a problem of triethylamine volatilization
The emulsion synthesized by this scheme may also have problems such as insufficient hardness and poor friction resistance.

Method used

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  • Nano silica-modified waterborne polyurethane emulsion, and preparation method and use thereof
  • Nano silica-modified waterborne polyurethane emulsion, and preparation method and use thereof
  • Nano silica-modified waterborne polyurethane emulsion, and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067]200g of polyester polyol CMA-1044 (M based on 1,4-butanediol-adipic acid n =1000, OH value=106-118mgKOH / g, Huada Chemical Group) was placed in a vacuum oven (model YZF6250, manufacturer: Shanghai Yaoshi Instrument Equipment Factory) at 120°C and dried for 1.5 hours to remove moisture in CMA-1044; Reduce its moisture content to 0.1% by weight, wherein the determination of moisture is carried out according to the Karl Fischer method in GB / T 11275-2007;

[0068] Add 80g of dried CMA-1044 into a 1000ml four-neck flask, then add 88g of isophorone diisocyanate (purchased from Bayer, Germany), and react at 85°C for 2.5h to obtain a polyurethane prepolymer. Then keep the temperature at 70°C, first add 5g of 1,4-butanediol, react for 0.5 hours; then add 9g of dimethylolpropionic acid, react for 0.5 hours, add 40ml of methyl ethyl ketone to adjust the viscosity of the prepolymer; After adding 0.09g of dibutyltin dilaurate catalyst, 4g of trimethylolpropane and 1.5g of nano silica...

Embodiment 2

[0072] 200g polytetrahydrofuran ether glycol (PTMG)-1000 (M n =1000, OH value=107-117mgKOH / g, purchased from Mitsubishi Chemical Co., Ltd. of Japan) and dried in a vacuum oven (model YZF6250, manufacturer: Shanghai Yaoshi Instrument Equipment Factory) at 120°C for 1.5 hours to remove PTMG-1000 Moisture; reduce its moisture content to 0.1% by weight, wherein the determination of moisture is carried out according to the Karl Fischer method in GB / T 11275-2007;

[0073] Add 70g of dried PTMG-1000 into a 1000ml four-neck flask, then add 85g of 4,4-dicyclohexylmethane diisocyanate (purchased from Bayer, Germany), and react at 87°C for 2.5h to obtain a polyurethane prepolymer . Then keep the temperature at 70°C, first add 4g of 1,4-butanediol, react for 0.5 hours; then add 12g of dimethylolpropionic acid, react for 0.5 hours, add 30ml of methyl ethyl ketone to adjust the viscosity of the prepolymer; Then add 0.1g of dibutyltin dilaurate catalyst, 5g of trimethylolpropane and 2g of ...

Embodiment 3

[0077] 200g of polyester polyol CMA44-600 (M based on 1,4-butanediol-adipic acid n =600, OH value=185-205mg KOH / g, Huada Chemical Group) was placed in a vacuum oven (model YZF6250, manufacturer: Shanghai Yaoshi Instrument Equipment Factory) at 120°C and dried for 1.5 hours to remove moisture in the CMA44-600 ; Reduce its moisture content to 0.1% by weight, wherein the determination of moisture is carried out according to the Karl Fischer method in GB / T 11275-2007;

[0078] Add 50g of dried CMA44-600 into a 1000ml four-neck flask, then add 70g of hexamethylene diisocyanate (purchased from Wanhua Chemical Group), and react at 85°C for 2.5h to obtain a polyurethane prepolymer. Then keep the temperature at 70°C, first add 4g of 1,4-butanediol, react for 0.5 hours; then add 9g of dimethylol formic acid, react for 0.5 hours, add 25ml of methyl ethyl ketone to adjust the viscosity of the prepolymer; Add 0.12g of stannous octoate catalyst, 4g of trimethylolpropane and 1g of nano-sili...

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Abstract

The invention relates to a nano silica-modified waterborne polyurethane emulsion and a preparation method and a use thereof. The nano silica-modified waterborne polyurethane emulsion has the advantages of better stripping property, more abrasion resistance, better high temperature resistance and higher transparency, and does not need to addition of triethylamine, so as to solve the volatility problem of triethylamine.

Description

field of invention [0001] The invention relates to the field of polymer materials, in particular to a nano-silica-modified water-based polyurethane emulsion, its preparation method and application. Background technique [0002] Transfer aluminized paper has become the main development trend of the packaging industry because of its environmental protection, economical and energy-saving and good printing properties. As an indispensable and important part of aluminized paper, transfer aluminized coating endows the aluminized paper with good printability, and the aluminized layer has excellent peelability. The existing transfer coatings on the market are mainly solvent-based transfer coatings, which can cause serious environmental pollution. During the construction process, it will cause great harm to the health of personnel, and a large amount of volatile components will cause the surrounding environment to be in a dangerous state of inflammability and explosion. . [0003] A...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D175/06C09D7/61C08G18/66C08G18/42C08G18/48C08G18/32C08G18/34
CPCC08G18/3206C08G18/348C08G18/4238C08G18/4854C08G18/664C08G18/6659C08G18/6674C08G18/6692C08K2201/011C09D5/18C09D175/06C09D175/08C09D7/61C09D7/67C08K3/36
Inventor 张建森张玉春郝伟
Owner 优美特(北京)环境材料科技股份公司
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