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Preparation method for polyfunctional urethane acrylate aqueous UV resin

A polyurethane acrylate and multi-functionality technology, applied in polyurea/polyurethane coatings, applications, coatings, etc., can solve the problems of poor light curing rate, low crosslink density, low double bond content, etc., and achieve excellent gloss degree, increase the double bond content, the effect of high solid content

Active Publication Date: 2013-08-07
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008]However, in the current public patents on UV-curable waterborne polyurethane acrylate, it is difficult to simultaneously ensure high solid content and superior mechanical properties, and have water resistance Sexuality, solvent resistance, and there are defects such as low double bond content and low crosslinking density, resulting in poor photocuring rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In parts by mass, the following examples are the same.

[0036] 1) Under the protection of nitrogen, put 37 parts of isophorone diisocyanate (IPDI) in a four-necked flask equipped with a mechanical stirrer, dropping funnel and reflux condenser, and add it dropwise within the temperature range of 60-65°C 36 parts of polyethylene glycol 800, raise the temperature to 80-85°C for 2.5 hours;

[0037] 2) Cool down to 40-45°C, add 4 parts of 1,4-butanediol dropwise for chain extension reaction for 0.5h;

[0038] 3) Raise the temperature to 55-60°C, add 7 parts of 2,2-dimethylolpropionic acid (DMPA) directly, raise the temperature to 70-80°C for 2.5 hours, and control the reaction system by adding a small amount of acetone during the reaction Viscosity, obtain the polyurethane prepolymer containing carboxyl group;

[0039] 4) Cool down to 40-45°C, add 9 parts of 0.03% 2,2,6,6-tetramethylpiperidine-1-oxyl free radical (TEMPO) dropwise to the above prepolymer while stirring Hy...

Embodiment 2

[0042] 1) Under the protection of nitrogen, put 37 parts of 1,6-hexamethylene diisocyanate (HDI) in a four-necked flask equipped with a mechanical stirrer, dropping funnel and reflux condenser. Add 23 parts of polyethylene glycol 400 dropwise within the range, and raise the temperature to 80-90°C for 2 hours;

[0043] 2) Cool down to 40-45°C, add 5 parts of 1,4-butanediol dropwise for chain extension reaction for 0.5h;

[0044] 3) Raise the temperature to 55-60°C, directly add 8 parts of 2,2-dimethylolpropionic acid (DMPA), raise the temperature to 70-80°C and react for 2.5 hours, and control the reaction system by adding a small amount of acetone during the reaction Viscosity, obtain the polyurethane prepolymer containing carboxyl group;

[0045] 4) Cool down to 40-45°C, add 21 parts of 0.03% 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxygen free to the above prepolymer dropwise while stirring Glyceryl dimethacrylate (GMDA) based (HTEMPO) was added dropwise within 1 h. After ...

Embodiment 3

[0048] 1) Under the protection of nitrogen, put 28 parts of toluene diisocyanate (TDI) in a four-necked flask equipped with a mechanical stirrer, dropping funnel and reflux condenser, and drop 41 parts of poly Ethylene glycol 1000, raise the temperature to 80-85°C for 2.5 hours;

[0049] 2) Cool down to 40-45°C, add 3 parts of 1,4-butanediol dropwise for chain extension reaction for 0.5h;

[0050] 3) Raise the temperature to 55-60°C, directly add 6 parts of 2,2-dimethylolpropionic acid (DMPA), raise the temperature to 70-80°C for 2.5 hours, and control the reaction system by adding a small amount of acetone during the reaction Viscosity, obtain the polyurethane prepolymer containing carboxyl group;

[0051] 4) Cool down to 40-45°C, add 15 parts of 0.03% 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxygen free to the above prepolymer dropwise while stirring Glyceryl dimethacrylate (GMDA) based (HTEMPO) was added dropwise within 1 h. After the dropwise addition, the temperature ...

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PUM

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Abstract

The invention discloses a preparation method for a polyfunctional urethane acrylate aqueous UV resin. According to the invention, diisocyanate reacts with polyester (ether) polyol to form a main chain, and a ratio of 1,4-butylene glycol to 2,2-dimethylol propionic acid to (methyl)hydroxy acrylate is adjusted so as to prepare the polyfunctional urethane acrylate aqueous UV resin which is allowed to have high cross-linking density and excellent comprehensive properties; considerable organic solvents are not needed in preparation of the resin, so unnecessary solvent evaporation and raw material waste are avoided; high solid content can guarantee that complex procedures like hot drying or infrared drying are reduced after film coating of the resin, so production time is reduced, and production efficiency is improved; and termination of unsaturated acrylic acid ester guarantees cross-linking density after photocuring of a polymer, and the cured polymer has excellent glossiness, mechanical performance, water resistance and solvent resistance.

Description

technical field [0001] The invention relates to a preparation method of a multifunctional polyurethane acrylate water-based UV resin, which can be widely used in the fields of wood, automobiles, electronic materials, leather water-based UV coatings, UV inks, and the like. Background technique [0002] The traditional ultraviolet (UV) photocuring system is mainly composed of photoinitiators, functional oligomers, reactive diluents (monomers) and various auxiliary agents. UV light curing technology has many advantages such as fast curing speed, operation at room temperature, low energy consumption, and excellent coating performance. However, with the development of society and the enhancement of people's awareness of environmental protection and energy saving, UV curing technology will inevitably develop in the direction of high performance and more environmental protection. The resin of the water-based system uses water instead of organic solvents as the dispersion medium, w...

Claims

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Application Information

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IPC IPC(8): C08G18/67C08G18/66C08G18/48C08G18/34C08G18/32C08G18/30C08G18/12C09D175/16C09D11/00C09D11/101
Inventor 刘晓暄崔艳艳罗青宏苏嘉辉罗啓权
Owner GUANGDONG UNIV OF TECH
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