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Urethane acrylate oligomer, and preparation method and ultraviolet-curing antifogging coating thereof

A polyurethane acrylate and acrylate technology, applied in the polymer field, can solve the problems of poor anti-fog durability of UV-cured coatings, and achieve excellent anti-fog durability

Active Publication Date: 2014-08-13
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coating film prepared by the UV-curable anti-fog coating has high hardness and good wiping performance, but the anti-fog durability of the UV-curable coating is poor

Method used

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  • Urethane acrylate oligomer, and preparation method and ultraviolet-curing antifogging coating thereof
  • Urethane acrylate oligomer, and preparation method and ultraviolet-curing antifogging coating thereof
  • Urethane acrylate oligomer, and preparation method and ultraviolet-curing antifogging coating thereof

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preparation example Construction

[0053] The present invention provides a kind of preparation method of polyurethane acrylate oligomer described in above-mentioned technical scheme, comprises the following steps:

[0054] a) under nitrogen or inert gas conditions, reacting hydroxyethyl acrylate, alkyl acrylate, fluorine-containing acrylate, alcohol ether compound, initiator and chain transfer agent to obtain the first intermediate;

[0055] b) reacting polyethylene glycol and diisocyanate with the first intermediate obtained in step a) to obtain a second intermediate;

[0056] c) in the presence of a catalyst and a polymerization inhibitor, reacting the acrylate containing a hydroxyl group with the second intermediate obtained in the step b) to obtain a polyurethane acrylate oligomer having the structure shown in formula I.

[0057]The present invention reacts hydroxyethyl acrylate, alkyl acrylate, fluorine-containing acrylate, alcohol ether compound, initiator and chain transfer agent under the condition of n...

Embodiment 1

[0118] In the present invention, under the protection of nitrogen, 58g of hydroxyethyl acrylate, 10g of butyl acrylate, 78g of 1H, 1H, 2H, 2H-perfluorodecyl acrylate and 160g of diethylene glycol butyl ether are added to a three-necked flask, and the temperature is raised to 100°C. , add 5.5g of azobisisobutyronitrile in 3 batches, continue to react for 2h, add 0.4g of dodecyl mercaptan, and react at 120°C for 1h to obtain the first intermediate;

[0119] Under nitrogen protection, add 42 g of polyethylene glycol with a molecular weight of 400 Daltons to the first intermediate, cool down to 75 ° C, stir for 20 min, and drop 76 g of 2,4-toluene-di Isocyanate, after adding, continue to stir for 2h to obtain the second intermediate;

[0120] Under nitrogen protection, raise the temperature of the second intermediate to 85°C, add 0.26g of dibutyltin dilaurate and 2.63g of hydroquinone, then lower the temperature to 70°C, and add 45g of Hydroxyethyl acrylate, continue to react for...

Embodiment 2

[0126] The present invention adds 110g hydroxyethyl acrylate, 18g butyl acrylate, 140g perfluoroalkyl ethyl methacrylate (Mn=534) and 220g diethylene glycol butyl ether in a three-necked flask under nitrogen protection, and heats up to At 110°C, 8.7 g of azobisisobutyronitrile was added in 3 batches, and the reaction was continued for 6 hours. Add 1.6g of dodecyl mercaptan and react at 130°C for 3h to obtain the first intermediate;

[0127]Under nitrogen protection, add 178g of polyethylene glycol with a molecular weight of 800 Daltons to the first intermediate, cool down to 80°C, stir for 20min, add 210g of isophorone diisocyanate dropwise at a speed of 14mL / min, and complete the addition Then continue stirring for 4h to obtain the second intermediate;

[0128] Under the protection of nitrogen, the temperature of the second intermediate was raised to 90°C, 0.48g of stannous octoate and 3.85g of p-hydroxyanisole were added, and then the temperature was lowered to 75°C, and 83...

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Abstract

The invention provides a urethane acrylate oligomer, which has a structure shown in a formula I. The urethane acrylate oligomer with the structure shown in the formula I is taken as matrix resin, and the ultraviolet-curing antifogging coating is provided, and comprises the urethane acrylate oligomer, a flatting agent, a defoamer, a photoinitiator and a silane coupling agent. The urethane acrylate oligomer provided by the invention comprises an ethoxy group and a fluoride group; the urethane acrylate oligomer has hydrophily by the ethoxy group; the urethane acrylate oligomer has low surface energy by the fluoride group, so that the ultraviolet-curing antifogging coating has lasting anti-fog performance. The experiment result shows that the primary anti-fog performance of the film cured by the ultraviolet-curing antifogging coating provided by the invention can be up to 10 levels, and the anti-fog persistence can be up to 8-10 levels.

Description

technical field [0001] The invention belongs to the technical field of polymers, and in particular relates to a polyurethane acrylate oligomer, a preparation method thereof and an ultraviolet curing anti-fog coating. Background technique [0002] Fog is a common natural phenomenon in the meteorological environment. When the water vapor in the air reaches or approaches the dew point temperature, it will condense into tiny liquid droplets to form fog. Transparent substrates such as glass and plastic often produce fogging during use, which reduces the transmittance and reflectivity of the substrate, affects the line of sight, brings inconvenience to people's lives, and even causes danger. [0003] In order to prevent the atomization of the surface of the transparent substrate, people have taken various measures to eliminate the condensation of the droplets. Among them, there are three commonly used methods: 1. Heating method: heating on the surface of the transparent substrate...

Claims

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Application Information

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IPC IPC(8): C08G18/67C08G18/62C08G18/48C08F220/24C08F220/28C08F220/18C09D175/14C09D5/00
CPCC08F220/24C08G18/4063C08G18/6229C08G18/672C08G18/673C09D175/14C08G18/6511C08G18/40C08G18/6674C08F220/281C08F220/1804
Inventor 张红明王献红李季王佛松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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