CN101724374A - UV curing packaging adhesive for liquid crystal display - Google Patents
UV curing packaging adhesive for liquid crystal display Download PDFInfo
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- CN101724374A CN101724374A CN200910237993A CN200910237993A CN101724374A CN 101724374 A CN101724374 A CN 101724374A CN 200910237993 A CN200910237993 A CN 200910237993A CN 200910237993 A CN200910237993 A CN 200910237993A CN 101724374 A CN101724374 A CN 101724374A
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- acrylate
- liquid crystal
- crystal display
- diacrylate
- packaging adhesive
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Abstract
The invention provides a UV curing packaging adhesive for a liquid crystal display. Based on 100 weight parts, the adhesive consists of following components: 40 to 70 parts of prepolymer, 20 to 50 parts of active diluent monomer, 1 to 8 parts of photoinitiator, and 0.1 to 5 parts of assistant. The prepolymer is one or a mixture of more of the urethane acrylate, epoxy acrylate and polyster acrylate. The UV curing packaging adhesive for the liquid crystal display has the characteristics of high curing speed, low shrinkage rate and excellent damp heat resistance.
Description
Technical field
The present invention relates to a kind of tackiness agent, particularly a kind of UV curing packaging adhesive for liquid crystal display.
Background technology
China has tame manufacturer more than 100 and institute to be engaged in the research of liquid-crystal display (LCD) device at present, and these LCD factory commercial cities need the UV curing packaging adhesive, and its market demand is huge.There are manufacturers such as Henkel Loctite, Japanese triple bond, Dymax in the main supplier of LCD encapsulating adhesive in the world, the most of dependence on import of the employed tackiness agent of China, and the research and development of UV curing packaging adhesive that wherein are used for plate of flat liquid crystal display are also less in China.The UV curing packaging adhesive mainly contains performed polymer, activity diluting monomer, light trigger, auxiliary agent composition.Wherein performed polymer and activity diluting monomer are the sensitization components, and the performance of UV curing packaging adhesive is played a decisive role.Using at present maximum in the electronic industry encapsulation is the epoxy acrylate system, and its principal feature is: cost is low, good reliability, and photocuring reaction speed is fast, and it is big to solidify back hardness and tensile strength, and solvent resistance is good; Shortcoming is: solidify glue-line fragility height, polyreaction is than just " being freezed " by firm cross-linked structure under the low-conversion, and residual unreacted group is unfavorable to performances such as ageing-resistant, anti-xanthochromias.
The LCD encapsulating adhesive is the important component part of LCD, and it must meet the following conditions:
1, because tackiness agent and liquid crystal are in contact with one another, and the solvency action of liquid crystal is extremely strong, thus tackiness agent must solidify front and back all be non-fusibility fabulous can complete crosslinked polymkeric substance;
2, behind the adhesive solidification on the reliability of hot and humid or high/low-temperature impact, to stand-40～80 ℃ temperature variation for a long time, as hot and humid 85 ℃ * 85%RH * 1500h, high/low-temperature impact-40～80 ℃ * 1500 times;
3, any external material that carries electric current will influence its works better in the LCD use, and the content of charged ion must be controlled seldom in the tackiness agent;
4, present stage high efficiency production technique, the photosensitivity of tackiness agent is had relatively high expectations, needing be 300mj/cm in 10 seconds
2Energy in reach the curing depth of 2mm.
Existing UV cured adhesive performance can't satisfy above-mentioned every requirement fully.
Summary of the invention:
The object of the present invention is to provide the UV curing packaging adhesive for liquid crystal display that a kind of curing speed is fast, cure shrinkage is low, wet-hot aging performance can be excellent.
The present invention realizes this purpose by the following technical solutions:
UV curing packaging adhesive for liquid crystal display of the present invention is calculated with 100 parts of weight, and this tackiness agent is composed of the following components:
Performed polymer 40-70 part;
Activity diluting monomer 20-50 part;
Light trigger 1-8 part;
Auxiliary agent 0.1-5 part;
Be characterized in that described performed polymer is any one or more the mixture in urethane acrylate, epoxy acrylate, the polyester acrylate.
Described activity diluting monomer is a methyl acrylate, methyl methacrylate, ethyl propenoate, Jia Jibingxisuanyizhi, butyl acrylate, butyl methacrylate, Hydroxyethyl acrylate, hydroxyethyl methylacrylate, Propylene glycol monoacrylate, Rocryl 410, cyclohexyl acrylate, Isooctyl acrylate monomer, isodecyl acrylate, isobornyl acrylate, isobornyl methacrylate, propylene glycol diacrylate, 1, the 6-hexanediyl ester, ethoxylated bisphenol a diacrylate, the tetraethylene-glycol diacrylate, neopentylglycol diacrylate, ethoxylated neopentylglycol diacrylate, 1,4 butanediol diacrylate, trimethylolpropane diacrylate, the ethoxylated trimethylolpropane diacrylate, pentaerythritol triacrylate, isocyanide arteries and veins acid triacrylate, Dipentaerythritol five acrylate, in the dipentaerythritol acrylate one or more.
Described light trigger is a methyl phenyl ketone, 2; 2-diethoxy methyl phenyl ketone, 1-hydroxyl-phenylcyclohexane ethyl ketone, 1-hydroxyl-cyclohexyl phenyl ketone, 2-hydroxyl-2-dimethyl-1-acetone, benzophenone, acroleic acid esterification benzophenone, thioxanthone, isopropyl thioxanthone, st-yrax, benzoin dimethylether, Benzoin ethyl ether, st-yrax n-butyl ether, 2-methyl isophthalic acid-(4-methylthio group phenyl)-2-morpholinyl-1-acetone, 2; 4, one or more in 6-trimethylbenzoyl-diphenyl phosphine oxide.
Described promotor is one or more in γ-An Bingjisanyiyangjiguiwan, γ-[(2,3)-epoxy third oxygen] propyl trimethoxy silicane, γ-(methacryloxypropyl) propyl trimethoxy silicane, the γ-mercaptopropyl trimethoxysilane.
Beneficial effect of the present invention is:
1, curing speed is fast, 200mj/cm
2Energy in can reach the curing depth of 2mm;
2, cure shrinkage is low, shrinks less than 4%, with glass and Bond Strength height;
3, wet-hot aging performance can be excellent, and decay does not appear in intensity after hot and humid 85 ℃ * 85%RH * 1500h, high/low-temperature impact-40～80 ℃ * 1500 times, and coming off does not appear in 100 ℃ of 168h of destructive boiling water bath;
4, electrical property and good with the liquid crystal non-fusibility, charged ion content are less than 3ppm, and uncured glue and liquid crystal coexistence 24h electrical property do not occur unusually.
According to The above results, this tackiness agent satisfies the service requirements of liquid-crystal display industry fully, can be applied to sealing of liquid crystal filling mouth and metal pin simultaneously and fix.
Embodiment:
Embodiment 1
Under normal temperature and normal pressure, respectively by specified each component concentration in the following table 1, performed polymer is selected urethane acrylate for use, activity diluting monomer selects for use ethyl propenoate and ethoxylated bisphenol a diacrylate to mix, light trigger is selected 1-hydroxyl-cyclohexyl phenyl ketone, selection of auxiliary γ-An Bingjisanyiyangjiguiwan for use.Above-mentioned materials is added in the reaction vessel, and temperature control 20-40 ℃ is uniformly dispersed with planetary mixer and gets final product.The ultra-violet curing light source can adopt the medium pressure mercury lamp of 1000W, and light intensity is 80mW/cm
2, effectively optical radiation centre wavelength is at 365nm.On the position of liquid-crystal display point glue, put glue, at 200mj/cm
2The integrating energy solidifies down, cool off 5 minutes, carries out hot and humid 85 ℃ * 85%RH * 1500h, high/low-temperature impact-40～80 ℃ * 1500 times, 100 ℃ of 168h of destructive boiling water bath and tests, and has listed test result in the table 1.
Embodiment 2
Repeat the method for embodiment 1 by specified each component concentration in the following table 1, performed polymer selects for use urethane acrylate and epoxy acrylate to mix, activity diluting monomer selects for use hydroxyethyl methylacrylate and ethoxylated bisphenol a diacrylate to mix, light trigger selects for use 1-hydroxyl-cyclohexyl phenyl ketone and benzoin dimethylether to mix, selection of auxiliary γ-[(2,3)-epoxy third oxygen] propyl trimethoxy silicane.Preparation and test environment are identical with embodiment's 1, have listed test result in the table 1.
Embodiment 3
Repeat the method for embodiment 1 by specified content in the following table 1; performed polymer selects for use urethane acrylate, epoxy acrylate and polyester acrylate to mix; activity diluting monomer is selected hydroxyethyl methylacrylate for use; light trigger selects 2 for use; 4; 6-trimethylbenzoyl-diphenyl phosphine oxide and 2-hydroxyl-2-dimethyl-1-acetone mixes, and selection of auxiliary γ-(methacryloxypropyl) propyl trimethoxy silicane and γ-mercaptopropyl trimethoxysilane mixes.Preparation and test environment are identical with embodiment's 1, have listed test result in the table 1.
Test results such as watch 1 listed embodiment and hot and humid, high/low-temperature impact thereof, destructive boiling water bath show: ultraviolet solidified adhesive curing speed of the present invention is fast, cure shrinkage is low, with glass and Bond Strength height, wet-hot aging performance can be excellent, electrical property and good with the liquid crystal non-fusibility, satisfy the service requirements of liquid-crystal display industry, can be applied to sealing of liquid crystal filling mouth and metal pin simultaneously and fix.
Table 1
Claims (4)
1. a UV curing packaging adhesive for liquid crystal display is calculated with 100 parts of weight, and this tackiness agent is composed of the following components:
Performed polymer 40-70 part;
Activity diluting monomer 20-50 part;
Light trigger 1-8 part;
Auxiliary agent 0.1-5 part;
It is characterized in that described performed polymer is any one or more the mixture in urethane acrylate, epoxy acrylate, the polyester acrylate.
2. a kind of UV curing packaging adhesive for liquid crystal display according to claim 1, it is characterized in that: described activity diluting monomer is a methyl acrylate, methyl methacrylate, ethyl propenoate, Jia Jibingxisuanyizhi, butyl acrylate, butyl methacrylate, Hydroxyethyl acrylate, hydroxyethyl methylacrylate, Propylene glycol monoacrylate, Rocryl 410, cyclohexyl acrylate, Isooctyl acrylate monomer, isodecyl acrylate, isobornyl acrylate, isobornyl methacrylate, propylene glycol diacrylate, 1, the 6-hexanediyl ester, ethoxylated bisphenol a diacrylate, the tetraethylene-glycol diacrylate, neopentylglycol diacrylate, ethoxylated neopentylglycol diacrylate, 1,4 butanediol diacrylate, trimethylolpropane diacrylate, the ethoxylated trimethylolpropane diacrylate, pentaerythritol triacrylate, isocyanide arteries and veins acid triacrylate, Dipentaerythritol five acrylate, in the dipentaerythritol acrylate one or more.
3. a kind of UV curing packaging adhesive for liquid crystal display according to claim 1; it is characterized in that: described light trigger is a methyl phenyl ketone; 2; 2-diethoxy methyl phenyl ketone; 1-hydroxyl-phenylcyclohexane ethyl ketone; 1-hydroxyl-cyclohexyl phenyl ketone; 2-hydroxyl-2-dimethyl-1-acetone; benzophenone; the acroleic acid esterification benzophenone; thioxanthone; isopropyl thioxanthone; st-yrax; benzoin dimethylether; Benzoin ethyl ether; the st-yrax n-butyl ether; 2-methyl isophthalic acid-(4-methylthio group phenyl)-2-morpholinyl-1-acetone; 2; 4, one or more in 6-trimethylbenzoyl-diphenyl phosphine oxide.
4. a kind of UV curing packaging adhesive for liquid crystal display according to claim 1, it is characterized in that: described promotor is one or more in γ-An Bingjisanyiyangjiguiwan, γ-[(2,3)-epoxy third oxygen] propyl trimethoxy silicane, γ-(methacryloxypropyl) propyl trimethoxy silicane, the γ-mercaptopropyl trimethoxysilane.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910237993A CN101724374A (en) | 2009-11-30 | 2009-11-30 | UV curing packaging adhesive for liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910237993A CN101724374A (en) | 2009-11-30 | 2009-11-30 | UV curing packaging adhesive for liquid crystal display |
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| CN101724374A true CN101724374A (en) | 2010-06-09 |
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| CN200910237993A Pending CN101724374A (en) | 2009-11-30 | 2009-11-30 | UV curing packaging adhesive for liquid crystal display |
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Application publication date: 20100609 |