CN105860902A - Composite mesophase pitch-based carbon fiber filled and modified composite epoxy pouring sealant for LED display screen - Google Patents
Composite mesophase pitch-based carbon fiber filled and modified composite epoxy pouring sealant for LED display screen Download PDFInfo
- Publication number
- CN105860902A CN105860902A CN201610402039.5A CN201610402039A CN105860902A CN 105860902 A CN105860902 A CN 105860902A CN 201610402039 A CN201610402039 A CN 201610402039A CN 105860902 A CN105860902 A CN 105860902A
- Authority
- CN
- China
- Prior art keywords
- based carbon
- mesophase pitch
- carbon fibers
- composite
- led display
- 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.)
- Pending
Links
Classifications
-
- 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 a composite mesophase pitch-based carbon fiber filled and modified composite epoxy pouring sealant for an LED display screen. The pouring sealant conducts surface coupling pretreatment on mesophase pitch-based carbon fibers which are good in mechanical enhancement effect and heat-conducting effect through a rare earth oxide-titanium aluminum composite coupling agent, the treated mesophase pitch-based carbon fibers and polyurethane prepolymer are subjected to hybrid reaction, and a composite filler with the comprehensive performance of inorganic matter and organic matter is obtained finally; the filler has good dispersity and associativity, the defect that a traditional nanofiller is prone to agglomeration is overcome, after the filler is composited with epoxy resin, the heat conductivity and mechanical property of the material are significantly improved, an LED chip packaged with the composite epoxy resin sealant is long in service life, and a good application prospect is shown in the aspect of high power LED display screen packaging.
Description
Technical field
The present invention relates to LED casting glue technical field, particularly relate to the compound intermediate phase pitch-based carbon of a kind of LED display
The composite epoxy casting glue that fiber is filling-modified.
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
Application study in epoxy resin embedding glue " literary composition utilize heat conduction inorganic filler epoxy resin is modified process, in certain journey
Improving the thermal 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 drips by compound mesophase
The composite epoxy casting glue that blue or green base carbon fibre is filling-modified.
The present invention is achieved by the following technical solutions:
The composite epoxy casting glue that a kind of LED display is filling-modified with being combined mesophase pitch-based carbon fibers, it is characterised in that
This packaging plastic is prepared by the raw material of following weight portion: bisphenol A epoxide resin 40-60, the modifies mesophase of rare earth-polyurethane prepolymer
Asphalt base carbon fiber 20-35, methyl-silicone oil 1-2, diluent CYH-277 5-15, polyurethanes 5-8, curing agent 20-80,
Antioxidant 0.1-0.5, UV light stabilizing agent 0.01-0.05, UV absorbers 0.01-0.05.
The described modifies mesophase pitch-based carbon fibers of rare earth-polyurethane prepolymer is prepared by following raw material: polyethers
Polyalcohol 10-20, methyl diphenylene diisocyanate 5-10, diethanol amine are appropriate, 800-1000 mesh intermediate phase pitch-based carbon is fine
Dimension 40-50, aluminate coupling agent 1-2, titanate 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 PPG, 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
Being heated to 120-130 DEG C after Jun Yun, hybrid reaction 4-5h, products therefrom mixes dispersion and grinds 2-with mesophase pitch-based carbon fibers
3h, is put in step (1) reaction vessel subsequently, and reduction system temperature, to 60-70 DEG C, adds dibutyl tin dilaurate,
Drip diethanol amine after mixed grinding reaction 2-3h, continue cooling discharge after griding reaction 1-1.5h, obtain described rare earth-poly-
Urethane performed polymer modification mesophase pitch-based carbon fibers.
Described curing agent is the one in methyl hexahydrophthalic anhydride, methyl tetrahydro phthalic anhydride.
The using method of this casting glue is: first by bisphenol A epoxide resin, the drip of rare earth-polyurethane prepolymer modifies mesophase
Blue or green base carbon fibre, methyl-silicone oil, polyurethanes, diluent, antioxidant, UV light stabilizing agent, UV absorbers mixing
Stirring, add curing agent subsequently, stirring while adding, after interpolation, mixed material is heated to 60-80 DEG C, gained glue
Inject in LED die to be packaged after vacuum defoamation processes, after natural precuring 4-5h, take out pre-packaged LED, be placed in true
In empty drying box, it is heated to 90-105 DEG C, after isothermal curing 4-5h, i.e. obtains the LED that embedding is good.
Good mechanics is strengthened the mesophase pitch-based carbon fibers of effect and heat-conducting effect through rare earth oxide-titanium by the present invention
Aluminium composite coupler surface coupling pretreatment, then by itself and base polyurethane prepolymer for use as hybrid reaction, finally give have concurrently inorganic matter with
The compounded mix of organic matter combination property, it has good dispersiveness and associativity, and improve that conventional filler easily reunites lacks
Fall into, thermal conductivity and the mechanical property with epoxy resin significantly improves material after compounding, encapsulate with this composite epoxy resin glue
LED chip long for service life, in terms of high-power LED display screen encapsulation, demonstrate good application prospect.
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 50, rare earth-polyurethane are pre-
Aggressiveness modification mesophase pitch-based carbon fibers 25, methyl-silicone oil 1.5, diluent CYH-277 10, polyurethanes 6, methyl
HHPA 50, antioxidant 0.2, UV light stabilizing agent 0.02, UV absorbers 0.03.
Its modifies mesophase pitch-based carbon fibers of middle rare earth-polyurethane prepolymer is prepared by following raw material: polyethers is many
Unit's alcohol 15, methyl diphenylene diisocyanate 8, diethanol amine are appropriate, 1000 mesh mesophase pitch-based carbon fibers 45, Aluminate are even
Connection agent 1.5, titanate coupling agent 1.2, rare earth oxide 0.5, dibutyl tin dilaurate 0.1.
Preparation method is:
(1) putting in reaction vessel by PPG, heating removing moisture, is subsequently added diphenyl methane under nitrogen atmosphere
Diisocyanate, hybrid reaction 6.5h 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
Being heated to 120-130 DEG C after Jun Yun, hybrid reaction 4.5h, products therefrom mixes dispersion and grinds with mesophase pitch-based carbon fibers
2.5h, is put in step (1) reaction vessel subsequently, and reduction system temperature, to 60-70 DEG C, adds dibutyl tin cinnamic acid
Tin, drips diethanol amine after mixed grinding reaction 2.5h, continues cooling discharge after griding reaction 1.2h, obtain described rare earth-
The modifies mesophase pitch-based carbon fibers of polyurethane prepolymer.
The using method of this casting glue is: first by bisphenol A epoxide resin, the drip of rare earth-polyurethane prepolymer modifies mesophase
Blue or green base carbon fibre, methyl-silicone oil, polyurethanes, diluent, antioxidant, UV light stabilizing agent, UV absorbers mixing
Stirring, add curing agent subsequently, stirring while adding, after interpolation, mixed material is heated to 70-80 DEG C, gained glue
Inject in LED die to be packaged after vacuum defoamation processes, after natural precuring 4.5h, take out pre-packaged LED, be placed in true
In empty drying box, it is heated to 90-100 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) | 0.87 |
| Elongation at break (%) | 62.5 |
| Hot strength (MPa) | 23.6 |
| Thermal coefficient of expansion | 0.26 |
| Water absorption rate | 0.10 |
Claims (4)
1. the composite epoxy casting glue that LED display is filling-modified with being combined mesophase pitch-based carbon fibers, its feature exists
In, this packaging plastic is prepared by the raw material of following weight portion: during bisphenol A epoxide resin 40-60, rare earth-polyurethane prepolymer are modifies
Between asphalt phase base carbon fibre 20-35, methyl-silicone oil 1-2, diluent CYH-277 5-15, polyurethanes 5-8, curing agent
20-80, antioxidant 0.1-0.5, UV light stabilizing agent 0.01-0.05, UV absorbers 0.01-0.05.
The complex loop that a kind of LED display the most as claimed in claim 1 is filling-modified with being combined mesophase pitch-based carbon fibers
Oxygen casting glue, it is characterised in that the described modifies mesophase pitch-based carbon fibers of rare earth-polyurethane prepolymer is by following raw material system
For obtaining: PPG 10-20, methyl diphenylene diisocyanate 5-10, diethanol amine are appropriate, 800-1000 mesh mesophase
Asphalt base carbon fiber 40-50, aluminate coupling agent 1-2, titanate coupling agent 1-1.5, rare earth oxide 0.5-0.6, dibutyl
Tin dilaurate tin 0.1-0.2；
Preparation method is:
(1) putting in reaction vessel by PPG, 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
After be heated to 120-130 DEG C, hybrid reaction 4-5h, products therefrom mix with mesophase pitch-based carbon fibers dispersion grind 2-3h,
Being put in step (1) reaction vessel subsequently, reduction system temperature, to 60-70 DEG C, adds dibutyl tin dilaurate, mixing
Drip diethanol amine after griding reaction 2-3h, continue cooling discharge after griding reaction 1-1.5h, obtain described rare earth-polyurethane
Performed polymer modification mesophase pitch-based carbon fibers.
The complex loop that a kind of LED display the most as claimed in claim 1 is filling-modified with being combined mesophase pitch-based carbon fibers
Oxygen casting glue, it is characterised in that described curing agent is the one in methyl hexahydrophthalic anhydride, methyl tetrahydro phthalic anhydride.
The complex loop that a kind of LED display the most as claimed in claim 1 is filling-modified with being combined mesophase pitch-based carbon fibers
The using method of oxygen casting glue is: first by bisphenol A epoxide resin, rare earth-polyurethane prepolymer modifies intermediate phase pitch-based carbon fibre
Dimension, methyl-silicone oil, polyurethanes, diluent, antioxidant, UV light stabilizing agent, UV absorbers mixing and stirring,
Adding curing 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 chamber after natural precuring 4-5h
In, it is heated to 90-105 DEG C, after isothermal curing 4-5h, i.e. obtains the LED that embedding is good.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610402039.5A CN105860902A (en) | 2016-06-08 | 2016-06-08 | Composite mesophase pitch-based carbon fiber filled and modified composite epoxy pouring sealant for LED display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610402039.5A CN105860902A (en) | 2016-06-08 | 2016-06-08 | Composite mesophase pitch-based carbon fiber filled and modified composite epoxy pouring sealant for LED display screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105860902A true CN105860902A (en) | 2016-08-17 |
Family
ID=56677178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610402039.5A Pending CN105860902A (en) | 2016-06-08 | 2016-06-08 | Composite mesophase pitch-based carbon fiber filled and modified composite epoxy pouring sealant for LED display screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105860902A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101495585A (en) * | 2006-07-28 | 2009-07-29 | 帝人株式会社 | Heat conductive adhesive |
-
2016
- 2016-06-08 CN CN201610402039.5A patent/CN105860902A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101495585A (en) * | 2006-07-28 | 2009-07-29 | 帝人株式会社 | Heat conductive adhesive |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105860900A (en) | Composite fine ceramic powder filled and modified high-heat-conducting epoxy pouring sealant for LED display screen | |
| CN102127384B (en) | Impact and light decay-resistant die attach insulation paste and preparation method thereof | |
| CN105907348A (en) | Nanometer aluminum nitride modified composite epoxy pouring sealant for LED display screen | |
| CN107880797B (en) | Special moisture-heat-resistant high-strength silicone structural adhesive for photovoltaic module | |
| CN102115655B (en) | Single component flexible epoxy sealant | |
| JP2007091960A (en) | Resin composition for sealing optical semiconductor element and optical semiconductor device obtained by using the same | |
| CN106047247A (en) | Electromagnetic-radiation-resistant high-heat-conductive modified composite epoxy pouring sealant for LED displays | |
| CN106047275A (en) | Nanometer diamond-titanium hybrid modified high-thermal conductivity LED organosilicon packaging glue and preparation method thereof | |
| CN106221665A (en) | A kind of LED organic silicon packaging glue of nano-cerium oxide nano aluminum nitride hybrid modification and preparation method thereof | |
| CN104031388A (en) | Phenyl siloxane rubber nanometer composite material and preparation method thereof | |
| CN106047252A (en) | Nanometer zinc oxide modified composite epoxy pouring sealant for LED display screen | |
| CN106381121A (en) | Transparent organic pouring sealant | |
| CN105860904A (en) | Composite nano silicon carbide filled and modified composite epoxy pouring sealant for LED display screen | |
| CN105950091A (en) | Epoxy resin pouring sealant modified by composite silicon nitride thermal conductive filler and used for LED display screen | |
| CN106047276A (en) | High-hardness high-adhesion modified high-heat conduction LED organosilicon package glue and preparation method thereof | |
| CN106566256A (en) | LED packaging material having high bonding strength and fluorescence function and preparation method thereof | |
| CN106047251A (en) | Boron nitride nanotube modified composite epoxy pouring sealant for LED display screen | |
| CN106047250A (en) | Nano-diamond modified composite epoxy pouring sealant for LED displays | |
| CN106085318A (en) | A kind of composite epoxy casting glue of LED display magnetic heat radiation | |
| CN105885012B (en) | A kind of preparation method of modified epoxy for LED encapsulation | |
| CN106047253A (en) | Nanometer aluminum oxide modified composite epoxy pouring sealant for LED streetlamp display screen | |
| CN105860902A (en) | Composite mesophase pitch-based carbon fiber filled and modified composite epoxy pouring sealant for LED display screen | |
| CN105969279A (en) | Nano-graphite-modified high-elasticity composite epoxy pouring sealant for LED street lamp display screen | |
| CN105969278A (en) | Naleic anhydride toughened and modified composite heat-conduction epoxy pouring sealant for LED display screen | |
| CN106047248A (en) | High-strength high-heat-conduction modified composite epoxy pouring sealant for LED displays |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160817 |