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UV-cured urethane acrylate coating with ultralow refractive index and high fluorine content

A technology of polyurethane acrylate and fluorine-containing hydroxy acrylate, which is applied in the field of protective coatings for laser optical fibers to achieve high glass transition temperature, excellent high and low temperature resistance and light transmission performance, and ensure the effect of curing speed

Inactive Publication Date: 2020-04-24
中昊北方涂料工业研究设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the independent guarantee capability of the key raw materials of high-energy laser weapons in my country, the major cultivation project of high-energy laser weapons has put forward an urgent demand for nationally produced laser optical fibers, but the laser optical fibers using domestic low-refractive index heat-resistant coatings as the inner coating of optical fibers cannot meet the requirements. The demand for high-power fiber laser light sources, therefore, low-refractive index heat-resistant coatings have become an important bottleneck for the development of high-power laser fibers in China

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Firstly, after mixing 50 g of trifluorooctyl methacrylate, 13 g of hydroxyethyl methacrylate, 40 g of perfluorohexylethylene, 10 g of trifluoroethyl methacrylate, and 4 0 g of trifluorooctyl methacrylate, the 10% of the mixture weight and 120g butyl acetate are dropped into the reaction kettle in the reaction bottle of the stirring heating device, feed into the N 2 Raise the temperature to reflux, add the remaining 90% monomer, 20g butyl acetate, and 2.6g benzoyl peroxide (BPO) dropwise at a constant speed within 3 hours, keep the temperature for 0.5 hour, and drop the remaining 10g butyl acetate, 0.3 g benzoyl peroxide, heat preservation reaction for 3 hours; reduce the temperature to 40°C and then reduce the pressure to 0.02atm, slowly heat up to 120°C to remove all solvents to obtain fluorine-containing hydroxyl acrylic resin; cool down to 70°C and add 15.5g methacrylic acid Ethyl isocyanate and 0.03 g of dibutyltin dilaurate were reacted for 3 hours until NCO≤0.1%, ...

Embodiment 2

[0026] First, mix 20g of trifluoroethyl acrylate, 15g of hexafluorobutyl acrylate, 50g of perfluorohexylethyl methacrylate, 14.4g of hydroxypropyl methacrylate, and 53.6g of trifluorooctyl methacrylate, 10% of the weight of the mixture and 120g xylene are dropped into the reaction kettle in a reaction flask with a stirring heating device, and feed N 2 Raise the temperature to reflux, add the remaining monomers, 20g xylene, and 2.6g benzoyl peroxide (BPO) dropwise at a constant speed within 3 hours, keep the temperature for 0.5 hours, and add the remaining 10g xylene and 0.3g benzoyl peroxide dropwise at a constant speed within 30 minutes Formyl, heat preservation reaction for 3 hours; reduce the temperature to 40°C and then reduce the pressure to 0.02atm, slowly raise the temperature to 128°C to remove all the solvents to obtain fluorine-containing hydroxyl acrylic resin; cool down to 70°C and add 15.5g of isocyanoethyl methacrylate Ester, 0.03g dibutyltin dilaurate reacted fo...

Embodiment 3

[0031] First, after mixing 28g of trifluoroethyl acrylate, 12g of hexafluorobutyl acrylate, 45g of perfluorohexylethyl methacrylate, 11.6g of hydroxyethyl acrylate, and 56g of trifluorooctyl methacrylate, the 10% of the mixture weight and 120g dimethylbenzene are dropped into the reaction kettle in the reaction bottle of the stirring heating device, feed N 2 Raise the temperature to reflux, add the remaining monomers, 20g xylene, and 2.6g benzoyl peroxide (BPO) dropwise at a constant speed within 3 hours, keep the temperature for 0.5 hours, and add the remaining 10g xylene and 0.3g benzoyl peroxide dropwise at a constant speed within 30 minutes Formyl, heat preservation reaction for 3 hours; reduce the temperature to 40°C and then reduce the pressure to 0.02atm, slowly raise the temperature to 128°C to remove all the solvents to obtain fluorine-containing hydroxyl acrylic resin; cool down to 70°C and add 15.5g of isocyanoethyl methacrylate Ester, 0.03g dibutyltin dilaurate rea...

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Abstract

The invention discloses a UV-cured urethane acrylate coating with an ultralow refractive index and high fluorine content. The coating comprises 50 to 60 wt% of a fluorine-containing urethane acrylateprepolymer, 15 to 25 wt% of a fluorine-containing acrylate monomer, 15 to 25 wt% of a perfluoropolyether urethane acrylate prepolymer, 1 to 5 wt% of a photoinitiator and 0.05 to 2 wt% of a stabilizer.The coating with the ultralow refractive index is mainly applied to a fiber laser with relatively high power.

Description

technical field [0001] The invention belongs to the field of optical fiber coatings, in particular to a protective coating for laser optical fibers, which is used for inner layer protection of optical fibers for optical fiber lasers. Background technique [0002] Among many types of lasers, fiber lasers have attracted more and more attention from many military powers because of their advantages such as good output beam quality, high electro-optical conversion efficiency, long life, good heat dissipation, compact appearance and small size. At present, the United States has equipped fiber lasers on ships and vehicles, and its airborne high-power fiber lasers have also made major breakthroughs. [0003] In order to promote the actual combat of high-energy laser weapons in my country and narrow the technological gap with developed countries such as the United States and Germany, the state has approved a major laser cultivation project. The fiber laser light source is required t...

Claims

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Application Information

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IPC IPC(8): C09D175/14
CPCC08L2205/025C09D175/14C08L75/14
Inventor 王国志沙伟华刘文兴孟军锋杨康孙哲杨茂林张鸣
Owner 中昊北方涂料工业研究设计院有限公司