Yellowing-resistant UV-curing liquid-state optical transparent adhesive and preparation method thereof

An optically transparent adhesive and anti-yellowing technology, which is applied in the direction of adhesives, non-polymer organic compound adhesives, etc., can solve the problems of low end-blocking rate and yellowing of large monomers, and achieve short reaction time and fast reaction time. Fast speed and good storage performance

Active Publication Date: 2019-02-01
山东慕尔斯新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The innovation of the present invention is to overcome the problems of yellowing of the macromonomer caused by the direct esterification reaction between hydroxyl-terminated liquid rubber and acryloyl chloride compounds under the catalysis of organic bases and the low end-capping rate of end groups catalyzed by inorganic bases. A UV curable liquid optically transparent adhesive with no yellowing, high light transmittance, 1.50-1.52 refractive index, and anti-yellowing prepolymer

Method used

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  • Yellowing-resistant UV-curing liquid-state optical transparent adhesive and preparation method thereof
  • Yellowing-resistant UV-curing liquid-state optical transparent adhesive and preparation method thereof
  • Yellowing-resistant UV-curing liquid-state optical transparent adhesive and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Embodiment 1, the synthesis of polybutadiene acrylate macromonomer

[0043] Add 10g of hydroxyl-terminated polybutadiene (hydroxyl content 0.64mmol / g) to a dry and clean 100ml three-neck flask, distill 60ml of THF, stir until clear and transparent under the protection of argon, add 0.66mmol of potassium naphthalene with a syringe and react at room temperature 1h, add 0.06g of acryloyl chloride (0.70mmol) to react for 0.5h, filter, precipitate with absolute ethanol and water for 3 times respectively, and vacuum dry at 50°C. The polybutadiene acrylate macromonomer is obtained with a yield of about 92%.

Embodiment 2

[0044] Embodiment 2, anti-yellowing UV curing liquid optically transparent adhesive preparation method

[0045] In the 100ml there-necked flask equipped with a stirrer, add 2.3g of polybutadiene acrylate macromonomer prepared in Example 1, 0.46g of isobornyl acrylate, 1.61g of ethoxyethoxyethyl acrylate, 0.23g of 1,6-hexanediol diacrylate, 0.46g of polybutadiene resin, after stirring evenly, add 0.23g of photoinitiator 2-hydroxy-2-methyl-1-phenylacetone (1173), continue Stir for 2 hours until uniform and transparent to obtain a UV-curable liquid optically transparent adhesive that is resistant to yellowing.

Embodiment 3

[0047] In the 100ml there-necked flask equipped with a stirrer, add 2.75g of polybutadiene acrylate macromonomer prepared in Example 1, 0.46g of isobornyl acrylate, 1.14g of ethoxyethoxyethyl acrylate, 1,6-hexanediol diacrylate 0.23g, polybutadiene resin 0.46g after stirring evenly, add photoinitiator 2-hydroxyl-2-methyl-1-phenylacetone (1173) 0.23g, polybutadiene Diene resin 0.46g, continue to stir for 2h until it is uniform and transparent, and a UV curable liquid optically transparent adhesive that is resistant to yellowing is obtained.

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Abstract

The invention relates to a yellowing-resistant UV-curing liquid-state optical transparent adhesive and a preparation method thereof, wherein the raw materials comprise, by mass, 20-70% of a liquid rubber acrylate macromonomer, 20-60% of an active dilution monomer, 3-20% of a cross-linking monomer, 5-20% of a polybutadiene resin, and 2-20% of a photoinitiator. According to the present invention, the new synthetic route is provided, wherein a hydroxyl-terminated liquid rubber reacts with naphthalene potassium to form a liquid rubber potassium alkoxide, and the liquid rubber potassium alkoxide reacts with an acryloyl chloride compound to form a liquid rubber acrylate macromonomer; with the method, the problems of macromonomer yellowing caused by the direct esterification reaction of the hydroxyl-terminated liquid rubber and the acryloyl chloride compound under the catalysis of the organic alkali and the low end capping rate of the inorganic alkali catalysis can be overcome; and the UV curing film has a light transmittance of up to 99%, a refractive index of 1.50-1.52, and a yellowing index of 0.3.

Description

technical field [0001] The invention relates to the technical field of UV curable optical adhesives, in particular to a UV curable liquid optical transparent adhesive resistant to yellowing and a preparation method thereof. Background technique [0002] UV curing liquid optical transparent adhesive is a special optical adhesive that is liquid at room temperature and can be cured and cross-linked under UV irradiation. The role of liquid optical transparent glue is to bond various optical glasses, filters and other transparent optical components together. On the other hand, it is used as an optical path in optical components to reduce the scattering ability of light and improve the brightness and contrast of display. . It has been widely used in mobile phones, computer touch screens and LCD TV touch screens and other fields. [0003] Acrylic liquid optically transparent adhesives have excellent optical properties, high adhesion, and water resistance, and have become the main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/06C09J4/02C08C19/28
CPCC08C19/28C09J4/06
Inventor 鲁在君武素盼衣同刚夏永全宫新建
Owner 山东慕尔斯新材料科技有限公司
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