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Ultraviolet light curable waterborne polyurethane acrylate and preparation method thereof

A technology of urethane acrylate and acrylate, which is applied in the fields of ink, adhesive, and coating, and can solve the problems that the performance of urethane acrylate needs to be improved, and achieve the effects of fast curing speed, easy dispersion, and low viscosity

Inactive Publication Date: 2017-06-20
广东昊辉新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a UV-curable waterborne polyurethane acrylate and its preparation method, aiming to solve the problem that the performance of polyurethane acrylate in the prior art needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Synthesis of polyurethane prepolymer: Add 73.2g tetramethylxylylene diisocyanate (TMXDI) and 100g polycaprolactone diol to a dry four-necked flask equipped with a stirrer, thermometer and condenser (Mw=1000), add 1.25g of catalyst dibutyltin dilaurate dropwise, the reaction is carried out in an electric heating mantle with temperature control, the temperature is raised to 90°C, and the reaction is kept at this temperature for 2h, and the content of NCO is measured by the di-n-butylamine method , when the NCO content is less than or equal to the theoretical value, then add 13.4g dimethylolpropionic acid (DMPA) into the four-necked flask, keep this temperature for 3h, measure the NCO content by the di-n-butylamine method, when the NCO content is less than When it is equal to the theoretical value, the polyurethane prepolymer is obtained;

[0047](2) Synthesis of partially blocked polyurethane acrylate: cool down to 65°C, weigh 0.5g of polymerization inhibitor p-hydrox...

Embodiment 2

[0051] (1) Synthesis of polyurethane prepolymer: Add 122g tetramethylxylylene diisocyanate (TMXDI) and 300g polycaprolactone diol ( Mw=1000), add dropwise 2g of catalyst dibutyltin dilaurate, the reaction is carried out in an electric heating mantle with temperature control, the temperature is raised to 90°C, and the temperature is maintained for 2h, and the content of NCO is measured by the di-n-butylamine method. When the NCO content is less than or equal to the theoretical value, add 13.4 g of dimethylolpropionic acid (DMPA) into the four-necked flask, keep the temperature for 3 hours, and measure the NCO content by the di-n-butylamine method. When the NCO content is less than or equal to the theoretical value Value, get polyurethane prepolymer;

[0052] (2) Synthesis of partially blocked urethane acrylate: cool down to 65°C, without adding a catalyst, weigh 0.8g of polymerization inhibitor p-hydroxyanisole, add 0.8g of antioxidant BHT into a four-necked flask, add dropwise...

Embodiment 3

[0056] (1) Synthesis of polyurethane prepolymer: add 170.8g tetramethylxylylene diisocyanate (TMXDI) and 500g polycaprolactone diol to a dry four-necked flask equipped with a stirrer, thermometer and condenser (Mw=1000), add 2.5g catalyst dibutyltin dilaurate dropwise, the reaction is carried out in an electric heating mantle with temperature control, the temperature is raised to 90°C, and the reaction is kept at this temperature for 2h, and the content of NCO is measured by the di-n-butylamine method , when the NCO content is less than or equal to the theoretical value, then add 13.4g dimethylolpropionic acid (DMPA) into the four-necked flask, keep this temperature for 3h, measure the NCO content by the di-n-butylamine method, when the NCO content is less than When it is equal to the theoretical value, the polyurethane prepolymer is obtained;

[0057] (2) Synthesis of partially blocked polyurethane acrylate: cool down to 65°C, without adding a catalyst, weigh 1g of polymeriza...

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Abstract

The invention discloses ultraviolet light curable waterborne polyurethane acrylate and a preparation method thereof. The method comprises the following steps: synthesizing a polyurethane prepolymer: carrying out a reaction on diisocyanate, polyester polyol, dimethylolpropionic acid and a catalyst to obtain the polyurethane prepolymer; adding a polymerization inhibitor, an antioxidant and multi-group acrylate with hydroxyl to the polyurethane prepolymer to react to obtain partially blocked urethane acrylate; neutralization and dispersion: adding organic amine to the partially blocked urethane acrylate to realize neutralization, and then performing dispersion; and amine chain extension: adding polyamine to perform a chain extension reaction to obtain the ultraviolet light curable waterborne polyurethane acrylate. The product prepared by the preparation method provided by the invention has the advantages of high solid content, high hardness, free of organic solvent, good adhesive force, capability of air drying or ultraviolet light curing, the product can be applied to UV curable wood paper coatings, UV curable plastic coatings, UV curable ink, UV curable adhesives and the other fields.

Description

technical field [0001] The invention relates to the technical fields of coatings, inks and adhesives, in particular to a UV-curable waterborne polyurethane acrylate and a preparation method thereof. Background technique [0002] Polyurethane acrylate coatings have always occupied an important position in the coatings industry because of their good wear resistance, adhesion, low temperature resistance, impact resistance, solvent resistance, and atmospheric resistance. However, traditional urethane acrylate light-curing coatings generally use organic solvents as dispersion media, which are toxic and flammable, and have certain harm to the human environment. It is also necessary to adjust the viscosity of the resin by adding reactive diluents, and these reactive diluents usually have certain skin irritation and volatility. Even after UV curing, some unreacted small molecules still volatilize into the air and are harmful to humans. harm to the environment. With the development...

Claims

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Application Information

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IPC IPC(8): C08G18/12C08G18/42C08G18/66C08G18/67C08G18/32
CPCC08G18/12C08G18/4277C08G18/6651C08G18/6659C08G18/673C08G18/3228
Inventor 谢国仁
Owner 广东昊辉新材料有限公司
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