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Ultraviolet light hybrid light curing waterborne polyurethane acrylate and preparation method and application thereof

A polyurethane acrylate, hybrid light curing technology, used in polyurea/polyurethane coatings, coatings, etc., can solve the problems of slow curing speed, high price, limited practical application, etc., and achieve fast curing reaction speed and prepolymer conversion. high rate effect

Inactive Publication Date: 2018-12-07
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has the disadvantages of slow curing speed, few types of prepolymers and reactive diluents, high price, and difficult adjustment of cured product properties.
thus limiting its practical application

Method used

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  • Ultraviolet light hybrid light curing waterborne polyurethane acrylate and preparation method and application thereof
  • Ultraviolet light hybrid light curing waterborne polyurethane acrylate and preparation method and application thereof
  • Ultraviolet light hybrid light curing waterborne polyurethane acrylate and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] After dehydration of 100 parts by weight of polypropylene carbonate diol with a molecular weight of 2000 and an intramolecular carbonate group molar fraction of 0.25, add 5 parts by weight of hydrophilic chain extender dimethylol propionic acid, 30 parts by weight of Toluene diisocyanate, 0.5 parts by weight of catalyst dibutyltin dilaurate, react at 80°C for 4 hours, cool down to 60°C, add 5 parts by weight of functional monomer hydroxyethyl methacrylate, 5 parts by weight of functional monomer shrink Glycerin was partially capped, reacted for 1 hour, cooled to 30°C, added 3.76 parts by weight of salt-forming agent triethylamine to react for 0.1 hour, added 280 parts by weight of deionized water, and emulsified at 0°C for 2 hours, then added 5 parts by weight of the chain extender diethylamine were reacted for 1 hour to obtain an ultraviolet light-mixed light-curable aqueous polyurethane acrylate emulsion. Adopt the Magna360 type Fourier transform infrared spectrometer...

Embodiment 2

[0049] With 100 parts by weight of molecular weight 2000, after the polypropylene carbonate diol dehydration of intramolecular carbonate group molar fraction is 0.25, add 6 parts by weight of hydrophilic chain extender dimethylol propionic acid, 45 parts by weight of toluene Diisocyanate, 0.5 parts by weight of catalyst dibutyltin dilaurate, react at 80°C for 4 hours, cool down to 60°C, add 10 parts by weight of functional monomer hydroxyethyl methacrylate for partial capping, react for 1 hour, cool down to 30°C, add 3.76 parts by weight of salt-forming agent triethylamine to react for 0.1 hour, add 280 parts by weight of deionized water, emulsify and react at 0°C for 2 hours, then add 5 parts by weight of chain extender diethylamine to react After 1 hour, an ultraviolet light mixed photocurable aqueous polyurethane acrylate emulsion was obtained.

[0050] Mix 100 parts by weight of the above-mentioned UV-cured water-based polyurethane acrylate emulsion with 3.5 parts by weigh...

Embodiment 3

[0052] With 100 parts by weight of molecular weight 2000, after the polypropylene carbonate diol dehydration of intramolecular carbonate group molar fraction is 0.25, add 5 parts by weight of hydrophilic chain extender dimethylol propionic acid, 30 parts by weight of toluene Diisocyanate, 0.5 parts by weight of catalyst dibutyltin dilaurate, react at 80°C for 4 hours, cool down to 60°C, add 5 parts by weight of functional monomer hydroxyethyl methacrylate, 5 parts by weight of functional monomer glycidol Carry out partial capping, react for 1 hour, cool down to 30°C, add 3.76 parts by weight of salt-forming agent triethylamine to react for 0.1 hour, add 280 parts by weight of deionized water, emulsify and react at 0°C for 2 hours, then add 5 The weight part of the chain extender diethylamine was reacted for 1 hour to obtain the ultraviolet light mixed photocurable aqueous polyurethane acrylate emulsion.

[0053] Mix 100 parts by weight of the above-mentioned UV-curable water-b...

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Abstract

The present invention provides an ultraviolet light hybrid light curing waterborne polyurethane acrylate comprising the following components by weight: 100 parts of polypropylene carbonate diol, 30-75parts of isocyanate, 3-10 parts of a hydrophilic chain extender, 5 to 20 parts of hydroxyethyl methacrylate, 5 to 20 parts of glycidol, 2 to 10 parts of a salt forming agent, 1 to 10 parts of a chainextender, and 0.01 to 2 parts of a catalyst. The invention also provides a preparation method of the ultraviolet light hybrid light curing waterborne polyurethane acrylate. The end group of the ultraviolet light hybrid light curing waterborne polyurethane acrylate prepared by the method contains unsaturated double bonds and epoxy groups, the ultraviolet light hybrid light curing waterborne polyurethane acrylate can be crosslinked according to the mechanism of free radicals and cations by adding of an initiator and irradiating with ultraviolet light. The curing reaction speed is faster, and prepolymer conversion rate is higher compared with a single curing method.

Description

technical field [0001] The invention belongs to the technical field of polyurethane acrylate and its preparation, and more specifically relates to an ultraviolet light-mixed light-cured water-based polyurethane acrylate and its preparation method and application. Background technique [0002] The water-based paint with water as the solvent not only reduces the cost of the paint, but also greatly reduces the VOC content, which complies with the requirements of environmental protection in today's world. However, due to the large latent heat of evaporation of water, it is necessary to increase the temperature to accelerate drying, and the curing rate is slow. The biggest advantage of UV-curable coatings is that the curing speed is fast and the curing temperature does not need to be raised, but a large amount of reactive diluents have a strong irritating effect on human skin and eyes, affecting the health of operators. In addition, too many reactive diluents It is difficult to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/67C08G18/66C08G18/44C08G18/34C08G18/32C09D175/14
CPCC08G18/3206C08G18/348C08G18/44C08G18/6659C08G18/672C08G18/7614C09D175/14
Inventor 朱炜健宋丽娜
Owner GUANGDONG UNIV OF TECH
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