Method of preparing short branch-chain urethane acrylate multifunctional resin with comb-like structure

A technology of polyurethane acrylate and polyurethane resin, which is applied in the field of preparation of comb-shaped multi-branched polyurethane acrylate photopolymerization resin, which can solve the problems of low hardness and low cross-linking density, and achieve high cross-linking density and high conversion rate , the effect of high hardness

Inactive Publication Date: 2015-03-25
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the higher degree of freedom of movement at the end, it usually has a higher curing rate, but because only the active double bond at the end participates in the polymerization reaction, resulting in low cross-linking density and low hardness of the coating after curing.

Method used

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  • Method of preparing short branch-chain urethane acrylate multifunctional resin with comb-like structure
  • Method of preparing short branch-chain urethane acrylate multifunctional resin with comb-like structure
  • Method of preparing short branch-chain urethane acrylate multifunctional resin with comb-like structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 1,6-hexanediol diacrylate (HDDA) (0.15mol) and diethanolamine (0.05mol) into a three-necked flask, add 20ml of methanol as a solvent, react at 25°C for 8 hours, and remove methanol by rotary evaporation; Add 15.66 g (0.02 mol) of the prepared product to the flask, add 0.008 g of dibutyltin dilaurate, maintain the reaction temperature at 40 ° C, add 8.88 g (0.04 mol) of isophorone diisocyanate (IPDI), 2 hours later Add 6.26g of polyethylene glycol (hydroxyl value: 268mgKOH / g) and 1.16g of HEA to the reaction system, and raise the temperature to 70°C. After 2 hours of reaction, detect the infrared absorption of isocyanate by infrared;

Embodiment 2

[0022] Add 1,6-hexanediol diacrylate (HDDA) (0.15mol) and diethanolamine (0.05mol) into a three-necked flask, add 20ml of methanol as a solvent, react at 25°C for 8 hours, and remove methanol by rotary evaporation; Add 15.66 g (0.02 mol) of the prepared product to the flask, add 0.016 g of dibutyltin dilaurate, maintain the reaction temperature at 50° C., add 8.88 g (0.04 mol) of isophorone diisocyanate (IPDI), 2 hours later Add 14.7g of ethylene oxide-propylene oxide copolymer (hydroxyl value 114mgKOH / g) and 1.16g of HEA to the reaction system, and raise the temperature to 80°C. After reacting for 2 hours, detect the infrared absorption of isocyanate by infrared;

Embodiment 3

[0024] Add 1,6-hexanediol diacrylate (HDDA) (0.15mol) and diethanolamine (0.05mol) into a three-necked flask, add 20ml of methanol as a solvent, react at 25°C for 8 hours, and remove methanol by rotary evaporation; Add 15.66 g (0.02 mol) of the prepared product to the flask, add 0.016 g of dibutyltin dilaurate, maintain the reaction temperature at 50° C., add 8.88 g (0.04 mol) of isophorone diisocyanate (IPDI), 2 hours later Add 15g of polytetrahydrofuran diol (hydroxyl value: 112mgKOH / g) and 1.16g of HEA to the reaction system, and heat up to 75°C. After reacting for 2 hours, detect the infrared absorption of isocyanate by infrared;

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Abstract

The invention discloses a method of preparing short branch-chain urethane acrylate multifunctional resin with a comb-like structure. The specific preparation method comprises the steps: performing a Michael addition reaction with diethanol amine and bi-functional monomers to obtain dihydric alcohol with photopolymerization activity, reacting the dihydric alcohol with isocyanate to obtain polyurethane prepolymers and reacting the polyurethane prepolymers with polyether glycol to prepare multifunctional oligomers. The results of a performance test on the prepared polyurethane resin show that the resin with the structure is capable of improving the hardness and shock resistance of epoxy acrylic resin.

Description

technical field [0001] The invention relates to the preparation of a comb-shaped multi-branched polyurethane acrylate photopolymerization resin, which belongs to the field of preparation of functional resins. technical background [0002] Oligomers for photopolymerization products are oligomers with relatively low molecular weight, usually having photopolymerization active functional groups such as acrylate or vinyl ether. The design and development of oligomers for photocuring generally consider the main properties such as viscosity, curing rate, and physical and mechanical properties. Among them, physical properties mainly examine properties such as hardness, wear resistance, flexibility, impact resistance and adhesion. These properties are mainly provided by photopolymerizable oligomers. Oligomer resins with better comprehensive performance can be obtained by designing and adjusting the chemical structure of oligomers. [0003] Polyurethane resin is an oligomer resin w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/67C08G18/48C09D175/14
CPCC08G18/755C08G18/4833C08G18/672C08G18/678C09D175/14
Inventor 马贵平方大为聂俊
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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