CN105950090A - Waterproof epoxy resin pouring sealant filled and modified by composite beryllium oxide and used for LED display screen - Google Patents
Waterproof epoxy resin pouring sealant filled and modified by composite beryllium oxide and used for LED display screen Download PDFInfo
- Publication number
- CN105950090A CN105950090A CN201610402036.1A CN201610402036A CN105950090A CN 105950090 A CN105950090 A CN 105950090A CN 201610402036 A CN201610402036 A CN 201610402036A CN 105950090 A CN105950090 A CN 105950090A
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- CN
- China
- Prior art keywords
- beryllium
- pouring sealant
- modified
- led display
- rare earth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6688—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3271
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/206—Applications use in electrical or conductive gadgets use in coating or encapsulating of electronic parts
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Abstract
The invention discloses waterproof epoxy resin pouring sealant filled and modified by composite beryllium oxide and used for an LED display screen. According to the pouring sealant, high-thermal-conductivity beryllium oxide is subjected to surface coupling pretreatment with a rare earth oxide-titanium aluminum composite coupling agent, then a product is subjected to a mixed reaction with polyurethane prepolymer, and finally the composite filler with comprehensive performance of both organic matter and inorganic matter is obtained. The problem that thermal-conducting filler is poor in dispersity is effectively improved, and after the filler is compounded with a resin body, the compound pouring sealant with an even and efficient thermal conductivity function is obtained. The pouring sealant is high in adhesive force and good in suppleness, a film layer is resistant to water and weather after the pouring sealant is cured, adhesion of dirt is avoided, and good application prospect is displayed on the aspect of packaging the large-power LED display screen, especially an LED display screen for outdoor use.
Description
Technical field
The present invention relates to LED casting glue technical field, particularly relate to a kind of LED display combined oxidation beryllium filling-modified
Waterproof epoxy pouring sealant.
Background technology
LED display is by assembling by light emitting diode, constitutes lattice module, thus realizes large-area display merit
Can, it is widely used in daily life.LED display is progressively to more high brightness, more long-life, preferably luminescence at present
Uniformity and the development of stability aspect, this requires integrated chip, high power undoubtedly, increasingly mature along with chip technology,
The performance of chip can substantially meet use demand, and the requirement of encapsulation technology corresponding with this is more and more higher.It is known that encapsulation
Effect directly influences serviceability and the life-span of LED chip, and the development in market proposes requirements at the higher level to encapsulation technology.
Casting glue be usually used in electronic component heat conduction, bonding, seal, embedding and coating protection etc., primarily serve protection against the tide,
Dust-proof, anticorrosion, shockproof and improve effect such as stability of module.At present application more for epoxy resin casting glue, ring
The oxygen class casting glue defect maximum when application is exactly that poor thermal conductivity, viscosity are big, reduces the service life of device.In order to be suitable for
Market demand, necessary be modified traditional epoxy resin embedding adhesive processes, and encapsulates effect satisfactorily to obtaining
Really." research of LED epoxy resin embedding adhesive " literary composition is using bisphenol A epoxide resin as material of main part, with polyurethane as increasing
Tough dose, use low viscous mixing amine curing agent and epoxy active diluent, prepared that viscosity is little, light transmission good, power
Learn the product of excellent performance, but this kind of modified epoxy class casting glue heat-conducting effect is poor, inadequate environmental protection；" ZnO is at Al2O3/ heat conduction ring
Applied research in epoxy resin embedding glue " literary composition utilize heat conduction inorganic filler epoxy resin is modified process, in certain journey
Improving the heat conductivity of epoxy resin on degree, but its mechanical property but has downward trend, viscosity becomes big.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of LED display combined oxidation beryllium is filled out
Fill the waterproof epoxy pouring sealant of modification.
The present invention is achieved by the following technical solutions:
The waterproof epoxy pouring sealant that a kind of LED display combined oxidation beryllium is filling-modified, it is characterised in that this packaging plastic by with
The raw material of lower weight portion prepares: bisphenol A epoxide resin 30-40, rare earth-base polyurethane prepolymer for use as modified oxidized beryllium 20-40, fluorine carbon tree
Fat 10-15, chlorination polypropylene carbonate 3-8, diluent CYH-277 5-15, firming agent 20-60, antioxidant 0.1-0.5, ultraviolet
Light stabilizer 0.01-0.05, UV absorbers 0.01-0.05.
The described modified oxidized beryllium of rare earth-base polyurethane prepolymer for use as is prepared by following raw material: polyether polyol 10-20,
Methyl diphenylene diisocyanate 5-10, diethanolamine are appropriate, 600-800 mesh beryllium oxide 40-50, aluminate coupling agent 1-2, titanium
Acid esters coupling agent 1-1.5, rare earth oxide 0.5-0.6, dibutyl tin dilaurate 0.1-0.2.
Preparation method is:
(1) putting in reaction vessel by polyether polyol, heating removing moisture, is subsequently added diphenyl methane under nitrogen atmosphere
Diisocyanate, hybrid reaction 6-8h under the conditions of 80-90 DEG C.
(2) aluminate coupling agent, titanate coupling agent, rare earth oxide are added in reaction vessel together, stirring mixing
Uniformly post-heating is to 120-130 DEG C, hybrid reaction 4-5h, and 2-3h is ground in the mixing dispersion of products therefrom beryllium oxide, is thrown subsequently
Entering in step (1) reaction vessel, reduction system temperature, to 60-70 DEG C, adds dibutyl tin dilaurate, mixed grinding reaction 4-
Drip diethanolamine after 5h, continue cooling discharge after griding reaction 1-1.5h, obtain described rare earth-polyurethane prepolymer modifies
Beryllium oxide.
Described firming agent is the one in methyl hexahydrophthalic anhydride, methyl tetrahydro phthalic anhydride.
The using method of this casting glue is: first by modifies to bisphenol A epoxide resin, fluorocarbon resin, rare earth-polyurethane prepolymer
Beryllium oxide, chlorination polypropylene carbonate, diluent, antioxidant, UV light stabilizing agent, UV absorbers mixing and stirring,
Adding firming agent subsequently, stirring while adding, after interpolation, mixed material is heated to 60-80 DEG C, and gained glue takes off through vacuum
Bubble injects in LED die to be packaged after processing, and takes out pre-packaged LED, be placed in vacuum drying oven after natural precuring 2-3h
In, it is heated to 100-120 DEG C, after isothermal curing 4-5h, i.e. obtains the LED that embedding is good.
The present invention by the beryllium oxide of high heat conduction through rare earth oxide-titanium aluminum composite coupler surface coupling pretreatment, then will
It is with base polyurethane prepolymer for use as hybrid reaction, finally gives the compounded mix having inorganic matter concurrently with Organic substance combination property, effectively
The problem improving heat filling bad dispersibility, it obtains the compound filling with uniform high-efficiency heat conduction effect with resinite after compounding
Sealing, this casting glue adhesive force is strong, and pliability is good, solidifies caudacoria layer water-proof climate resisting, does not adhere to dirt, shows at great power LED
Display screen encapsulation aspect demonstrates good application prospect, especially outdoor LED display.
Detailed description of the invention
The casting glue of this embodiment is prepared by the raw material of following weight portion: bisphenol A epoxide resin 35, rare earth-polyurethane are pre-
The modified oxidized beryllium of aggressiveness 30, fluorocarbon resin 12, chlorination polypropylene carbonate 6, diluent CYH-277 12, methyl hexahydrophthalic anhydride
50, antioxidant 0.2, UV light stabilizing agent 0.02, UV absorbers 0.02.
Its modified oxidized beryllium of middle rare earth-base polyurethane prepolymer for use as is prepared by following raw material: polyether polyol 15, diphenyl
Methane diisocyanate 8, diethanolamine are appropriate, 800 mesh beryllium oxide 45, aluminate coupling agent 1.5, titanate coupling agent 1.2, dilute
Soil oxide 0.5, dibutyl tin dilaurate 0.1.
Preparation method is:
(1) putting in reaction vessel by polyether polyol, heating removing moisture, is subsequently added diphenyl methane under nitrogen atmosphere
Diisocyanate, hybrid reaction 7h under the conditions of 80-90 DEG C.
(2) aluminate coupling agent, titanate coupling agent, rare earth oxide are added in reaction vessel together, stirring mixing
Uniformly post-heating is to 120-130 DEG C, hybrid reaction 4.5h, and 2.5h is ground in the mixing dispersion of products therefrom beryllium oxide, is thrown subsequently
Entering in step (1) reaction vessel, reduction system temperature, to 60-70 DEG C, adds dibutyl tin dilaurate, and mixed grinding reacts
Drip diethanolamine after 4.5h, continue cooling discharge after griding reaction 1.2h, obtain described rare earth-polyurethane prepolymer modifies
Beryllium oxide.
The using method of this casting glue is: first by modifies to bisphenol A epoxide resin, fluorocarbon resin, rare earth-polyurethane prepolymer
Beryllium oxide, chlorination polypropylene carbonate, diluent, antioxidant, UV light stabilizing agent, UV absorbers mixing and stirring,
Adding firming agent subsequently, stirring while adding, after interpolation, mixed material is heated to 70-80 DEG C, and gained glue takes off through vacuum
Bubble injects in LED die to be packaged after processing, and takes out pre-packaged LED, be placed in vacuum drying oven after natural precuring 2.5h
In, it is heated to 110-120 DEG C, after isothermal curing 4.5h, i.e. obtains the LED that embedding is good.
The performance test results of this casting glue is as follows:
| Detection project | Testing result |
| Thermal conductivity (W.m-1.k-1) | 0.88 |
| Elongation at break (%) | 22.6 |
| Hot strength (MPa) | 6.8 |
| Thermal coefficient of expansion | 0.62 |
| Water absorption rate | 0.15 |
Claims (4)
1. the waterproof epoxy pouring sealant that a LED display combined oxidation beryllium is filling-modified, it is characterised in that this packaging plastic by
The raw material of following weight portion prepares: bisphenol A epoxide resin 30-40, rare earth-base polyurethane prepolymer for use as modified oxidized beryllium 20-40, fluorine carbon
Resin 10-15, chlorination polypropylene carbonate 3-8, diluent CYH-277 5-15, firming agent 20-60, antioxidant 0.1-0.5, purple
Outer light stabilizer 0.01-0.05, UV absorbers 0.01-0.05.
The waterproof epoxy pouring sealant that a kind of LED display combined oxidation beryllium the most as claimed in claim 1 is filling-modified, it is special
Levying and be, the described modified oxidized beryllium of rare earth-base polyurethane prepolymer for use as is prepared by following raw material: polyether polyol 10-20, two
Methylenebis phenyl isocyanate 5-10, diethanolamine are appropriate, 600-800 mesh beryllium oxide 40-50, aluminate coupling agent 1-2, metatitanic acid
Ester coupling agent 1-1.5, rare earth oxide 0.5-0.6, dibutyl tin dilaurate 0.1-0.2；
Preparation method is:
(1) putting in reaction vessel by polyether polyol, heating removing moisture, is subsequently added diphenyl methane under nitrogen atmosphere
Diisocyanate, hybrid reaction 6-8h under the conditions of 80-90 DEG C；
(2) aluminate coupling agent, titanate coupling agent, rare earth oxide are added in reaction vessel together, be uniformly mixed
Post-heating is to 120-130 DEG C, and hybrid reaction 4-5h, the mixing dispersion of products therefrom beryllium oxide is ground 2-3h, put into step subsequently
Suddenly, in (1) reaction vessel, reduction system temperature, to 60-70 DEG C, adds dibutyl tin dilaurate, after mixed grinding reaction 4-5h
Dropping diethanolamine, continues cooling discharge after griding reaction 1-1.5h, obtains described rare earth-base polyurethane prepolymer for use as modified oxidized
Beryllium.
The waterproof epoxy pouring sealant that a kind of LED display combined oxidation beryllium the most as claimed in claim 1 is filling-modified, it is special
Levying and be, described firming agent is the one in methyl hexahydrophthalic anhydride, methyl tetrahydro phthalic anhydride.
Making of the waterproof epoxy pouring sealant that a kind of LED display combined oxidation beryllium the most as claimed in claim 1 is filling-modified
By method it is: first by bisphenol A epoxide resin, fluorocarbon resin, the modified oxidized beryllium of rare earth-base polyurethane prepolymer for use as, chlorination poly-trimethylene carbon
Acid esters, diluent, antioxidant, UV light stabilizing agent, UV absorbers mixing and stirring, add firming agent, limit subsequently
Edged stirs, and after interpolation, mixed material is heated to 60-80 DEG C, and gained glue injects to be packaged after vacuum defoamation processes
In LED die, take out pre-packaged LED after natural precuring 2-3h, be placed in vacuum drying oven, be heated to 100-120 DEG C, permanent
I.e. obtain, after temperature solidification 4-5h, the LED that embedding is good.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610402036.1A CN105950090A (en) | 2016-06-08 | 2016-06-08 | Waterproof epoxy resin pouring sealant filled and modified by composite beryllium oxide and used for LED display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610402036.1A CN105950090A (en) | 2016-06-08 | 2016-06-08 | Waterproof epoxy resin pouring sealant filled and modified by composite beryllium oxide and used for LED display screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105950090A true CN105950090A (en) | 2016-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610402036.1A Pending CN105950090A (en) | 2016-06-08 | 2016-06-08 | Waterproof epoxy resin pouring sealant filled and modified by composite beryllium oxide and used for LED display screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105950090A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101580686A (en) * | 2009-05-07 | 2009-11-18 | 中国工程物理研究院化工材料研究所 | Epoxide resin pouring sealant with low density and high impact resistance and preparation method thereof |
| CN104178076A (en) * | 2014-09-11 | 2014-12-03 | 黎明化工研究设计院有限责任公司 | Heat-conducting electric-insulating epoxy resin potting adhesive and preparation method thereof |
-
2016
- 2016-06-08 CN CN201610402036.1A patent/CN105950090A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101580686A (en) * | 2009-05-07 | 2009-11-18 | 中国工程物理研究院化工材料研究所 | Epoxide resin pouring sealant with low density and high impact resistance and preparation method thereof |
| CN104178076A (en) * | 2014-09-11 | 2014-12-03 | 黎明化工研究设计院有限责任公司 | Heat-conducting electric-insulating epoxy resin potting adhesive and preparation method thereof |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160921 |
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| RJ01 | Rejection of invention patent application after publication |