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UV-LED curing initiation system, sealing glue, and preparation method and application of sealing glue

A UV-LED, initiation system technology, applied in the field of chemical materials, can solve the problems of short service life, decreased acid and alkali resistance of the sealant, low efficiency, etc., to achieve the effect of operable quality and avoid the phenomenon of oxygen inhibition.

Active Publication Date: 2018-04-27
广州惠利电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] UV curing technology is a high-efficiency, energy-saving, economical and widely applicable technology, but the traditional UV curing technology (medium pressure mercury lamp) also has some unavoidable shortcomings: (1) high energy consumption, low efficiency, medium Mercury pressure lamps emit about 30% of ultraviolet light, while infrared light and other heat radiation account for about 60%. Since most of the input power is converted into heat energy, the temperature of the lamp tube can rise to 700-800°C, which will be unfavorable to the substrate. Impact; (2) The medium-pressure mercury lamp needs to be cold-started, and the warm-up time takes about 10 minutes, and once the lamp is turned off, it cannot be started immediately, and it must wait for 15-20 minutes to cool before restarting; (3) The service life is short, The average is about 2000h; (4) The medium pressure mercury lamp will generate ozone during use, and the mercury contained in it is harmful to human body and environment
[0005] Although the reachable depth of ultraviolet light (365nm or 395nm) emitted by UV-LED is improved, due to its low energy, the amount of free radicals excited during curing is reduced, and the curing efficiency may decrease instead. Dryness, especially in colored systems
[0006] However, when the sealant used for medium-pressure mercury lamp curing is cured by UV-LED, there is usually poor curing, which leads to a decrease in the physical properties of the sealant such as acid and alkali resistance, and cannot meet the requirements of the glass thinning process.
Even if acyl phosphine oxide is used as the photoinitiator, there will be a serious phenomenon of surface oxygen inhibition, and the glue that is not completely cured will stick to the glass surface during the worker's operation (that is, offset printing will occur), which will affect the quality of glass etching, or stick to it. Cross-contamination on gloves or fixtures, especially colored sealants

Method used

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  • UV-LED curing initiation system, sealing glue, and preparation method and application of sealing glue
  • UV-LED curing initiation system, sealing glue, and preparation method and application of sealing glue
  • UV-LED curing initiation system, sealing glue, and preparation method and application of sealing glue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A UV-LED curing sealant for glass thinning process, which is a light red UV-LED light curing product, prepared from the following raw materials:

[0060] Oligomers: 41.52 g in total.

[0061] Urethane acrylate 41.52g.

[0062] Active monomer: 46.69 g in total.

[0063] Monofunctional acrylate, isobornyl acrylate (IBOA) 38.20g,

[0064] Difunctional acrylate, dioxyhexadiol diacrylate 8.49g.

[0065] UV-LED curing initiation system: 6.79g in total.

[0066] Cleavage type free radical photoinitiator: 2-hydroxyl-2-methyl-phenylacetone-1 (liquid) 2.00g,

[0067] [Bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide] (solid) 2.00 g.

[0068] Hydrogen abstraction free radical photoinitiator: 2.79 g of isopropylthioxanthene (solid).

[0069] Additives: 5.00 g in total.

[0070] Adhesion promoter (γ-methacryloxypropyltriethoxysilane) 0.95g,

[0071] (multifunctional thiol compound, model is PE-LED) 3.47g,

[0072] Defoamer (silicone defoamer, model BYK066N) 0.3g,

[0073] ...

Embodiment 2

[0090] A UV-LED curing sealant for glass thinning process, which is a red transparent UV light curing product, prepared from the following raw materials:

[0091] Oligomers: 44.35 g in total.

[0092] Polybutadiene acrylate 44.35g.

[0093] Active monomer: 43.33 g in total.

[0094] Monofunctional Acrylate, Lauric Acrylate 26.00g,

[0095] Difunctional acrylate, tricyclodecane dimethanol diacrylate 17.33g.

[0096] UV-LED curing initiation system: 7.00 g in total.

[0097] Cracking type free radical photoinitiator: 1-hydroxycyclohexyl phenyl ketone (solid) 2.0g,

[0098] 2,4,6-Trimethylbenzoyl-diphenylphosphine oxide (solid) 2.0 g.

[0099] Hydrogen abstraction radical photoinitiator: isopropylthioxanthene (solid) 3.00.

[0100] Additives: 4.97g in total.

[0101] Adhesion promoter (γ-methacryloxypropyltriethoxysilane) 0.95g,

[0102] (multifunctional thiol compound, model is PE-LED) 3.47g,

[0103] Defoamer (silicone defoamer, model BYK066N) 0.3g,

[0104] Leveling ...

experiment example

[0131] The thinned sealants prepared in the above examples and comparative examples were subjected to performance testing after screen printing, the method is as follows:

[0132] Viscosity: Viscosity at 25°C, tested according to the standard "GB / T 22314-2008 Viscosity Test Method of Plastic Epoxy Resin".

[0133] Specific gravity: 25°C, according to the standard "GB / T 15223-2008 Determination of density of plastic liquid resin by pycnometer method".

[0134] Hardness: 23±2°C, according to the standard "GB / T 2411-2008 Determination of indentation hardness (Shore hardness) of plastics and hard rubber using a durometer (Shore hardness)".

[0135] Shear strength: Test according to the standard "Determination of Tensile Shear Strength of Adhesives", the bonding area is 25mm×6mm, glass is glued to glass, the tensile speed is 5mm / min, and 10 pieces are tested in each group data.

[0136] Resistant to concentrated H 2 SO 4 : After being glued on two pieces of glass for four weeks...

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Abstract

The invention relates to a UV-LED curing initiation system, a sealing glue, and a preparation method and an application of the sealing glue, and belongs to the technical field of chemical materials. The UV-LED curing initiation system is prepared mainly from the following raw materials in parts by weight: 2-8 parts of a cracking type free radical photoinitiator and 2-5 parts of a hydrogen abstracting type free radical photoinitiator; the cracking type free radical photoinitiator is at least one of alpha-hydroxyketone derivatives and acyl phosphine oxides; the hydrogen abstracting type free radical photoinitiator is at least one of thioxanthone or thioxanthone derivatives. The UV-LED curing initiation system is used with combination of short-wave photoinitiators and long-wave photoinitiators, can ensure the curing efficiency of a surface layer and an inner layer of the glue, ensures the curing quality and solves an oxygen polymerization inhibition phenomenon. Moreover, the UV-LED curinginitiation system itself is OK to acid and alkali tolerance, and cannot affect the tolerance of the sealing glue to acids and alkalis, so as to meet the use requirements of the sealing glue in a glass thinning process.

Description

technical field [0001] The invention relates to the technical field of chemical materials, in particular to a UV-LED curing initiator glue and its preparation method and application. Background technique [0002] UV curing technology is a high-efficiency, energy-saving, economical and widely applicable technology, but the traditional UV curing technology (medium pressure mercury lamp) also has some unavoidable shortcomings: (1) high energy consumption, low efficiency, medium Mercury pressure lamps emit about 30% of ultraviolet light, while infrared light and other heat radiation account for about 60%. Since most of the input power is converted into heat energy, the temperature of the lamp tube can rise to 700-800°C, which will be unfavorable to the substrate. Impact; (2) The medium-pressure mercury lamp needs to be cold-started, and the warm-up time takes about 10 minutes, and once the lamp is turned off, it cannot be started immediately, and it must wait for 15-20 minutes t...

Claims

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Application Information

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IPC IPC(8): C08F2/48C09J175/14C09J11/06C09J4/02C09J4/06
CPCC08F2/48C09J4/06C09J11/06C09J175/14
Inventor 于爱霞李利华张育淇郑长利黄仁杰
Owner 广州惠利电子材料有限公司
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