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Preparation method of photocurable hyperbranched polyurethane-epoxy acrylate

A hyperbranched polyurethane, epoxy acrylate technology, applied in polyurea/polyurethane coatings, epoxy resin coatings, coatings, etc., can solve the problems of increasing VOC emissions and production costs, reducing system viscosity, non-compliance, etc. Novel synthetic route, high hardness and flexibility, good technical effect

Active Publication Date: 2022-03-08
江苏三木化工股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above two routes need to use more solvents to reduce the viscosity of the system, and then remove the solvents to obtain solid powder samples. The extensive use of solvents increases VOC emissions and production costs, which is not in line with the current concept of green environmental protection.

Method used

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  • Preparation method of photocurable hyperbranched polyurethane-epoxy acrylate

Examples

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Effect test

Embodiment 1

[0027] A kind of preparation method of photocurable hyperbranched polyurethane-epoxy acrylate, it comprises the following steps:

[0028] (1) After mixing 500 grams of polypropylene glycol (PPG1000) and 0.2 grams of dibutyltin dilaurate, slowly add it dropwise to 505 grams of HDI trimer (Covestro N3300), and react at 70 ° C until the NCO content reached 7.8%, the temperature of the reaction system was lowered to room temperature to obtain hyperbranched polyisocyanate.

[0029] (2) Add 149.7 grams of glycidol dropwise to the above system, add 0.05 grams of dibutyltin dilaurate, and continue to react at 80°C until the NCO content reaches below 0.2%, to obtain hyperbranched polyurethane-epoxy resin .

[0030] (3) Add a mixture of 147 grams of acrylic acid and 3.9 grams of tetrabutylammonium chloride dropwise to the above system and react at 100°C until the acid value of the system drops below 5mgKOH / g to obtain photocurable hyperbranched Polyurethane-epoxy acrylate.

Embodiment 2

[0032] A kind of preparation method of photocurable hyperbranched polyurethane-epoxy acrylate, it comprises the following steps:

[0033] (1) After mixing 176.7 grams of ethoxylated trimethylolpropane (EO9TMP) with 0.15 grams of dibutyltin dilaurate, slowly add it dropwise to 388.5 grams of isophorone diisocyanate IPDI, at 70 ° C Keeping warm until the NCO content reaches 18.6%, the temperature of the reaction system is lowered to room temperature to obtain hyperbranched polyisocyanate.

[0034] (2) Add 187.1 grams of glycidol dropwise to the above reaction system, add 0.03 grams of monobutyltin oxide, and continue to react at 80° C. until the NCO content reaches below 0.2%, to obtain hyperbranched polyurethane-epoxy resin.

[0035] (3) A mixture of 72 grams of acrylic acid, 129 grams of methacrylic acid and 3 grams of tetramethylammonium bromide was added dropwise to the above system, and reacted at 100 ° C until the acid value of the system dropped below 5 mg KOH / g, A photo...

Embodiment 3

[0037] A kind of preparation method of photocurable hyperbranched polyurethane-epoxy acrylate, it comprises the following steps:

[0038] (1) After mixing 88.7 grams of ethoxylated trimethylolpropane (EO3TMP) with 0.1 grams of dibutyltin dilaurate, slowly add dropwise to 220 grams of isophorone diisocyanate IPDI and 130.6 grams of toluene diisocyanate In the TDI mixture, keep warm at 65° C. until the NCO content reaches 23.8%, and then lower the temperature of the reaction system to room temperature to obtain hyperbranched polyisocyanate.

[0039](2) Add 185.3 grams of glycidol dropwise to the above reaction system, add 0.02 gram of stannous octoate, and continue to react at 80° C. until the NCO content reaches below 0.2%, to obtain hyperbranched polyurethane-epoxy resin.

[0040] (3) Add a mixture of 215 grams of methacrylic acid and 1 gram of tetrabutylammonium chloride dropwise to the above system, and react at 100 ° C until the acid value of the system drops below 5 mgKOH / ...

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Abstract

The invention discloses a preparation method of photocurable hyperbranched polyurethane-epoxy acrylate, which comprises the following steps: firstly synthesizing hyperbranched polyisocyanate, then reacting with glycidyl to obtain hyperbranched polyurethane-epoxy resin, and finally performing ring-opening reaction with acrylic acid or methacrylic acid to obtain the photocurable hyperbranched polyurethane-epoxy acrylate. And the photocurable hyperbranched polyurethane-epoxy acrylate is obtained. The method is simple and easy to implement and high in feasibility, the prepared photocurable hyperbranched polyurethane-epoxy acrylate is high in curing speed, and a cured film is high in hardness, good in flexibility and good in wear resistance.

Description

technical field [0001] The invention belongs to the technical field of photocurable resins, and in particular relates to a preparation method of photocurable hyperbranched polyurethane-epoxy acrylate. Background technique [0002] Ultraviolet (UV) curing technology is a new energy-saving and environmentally-friendly technology. With its high efficiency, energy-saving and environmental protection characteristics, it has been more and more widely used in coatings, inks, adhesives and other industries. UV curing materials only contain a very small amount of solvent, known as a new generation of "green technology". Since the German Bayer company developed the first generation of UV-cured wood coatings in 1968, UV-cured technology has developed rapidly around the world. Hyperbranched polymers are highly branched macromolecules with three-dimensional dendritic structures. Compared with dendrimers, hyperbranched polymers have a small degree of branching, a wide molecular weight d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/83C08G59/17C09D163/10C09D175/14
CPCC08G18/831C08G59/1466C09D175/14C09D163/10Y02P20/10
Inventor 谢寒汤佳葛文成贺一铭惠正权
Owner 江苏三木化工股份有限公司
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