Single-liquid type display screen epoxy pouring sealant and preparation method thereof

A technology of display screen and potting glue, applied in the direction of epoxy resin glue, adhesive, adhesive type, etc., can solve the problems of batch loss, weight ratio error, confusion and other problems of display SMD SMD LED, so as to avoid The effect of wrong glue ratio, stable storage at low temperature, and long service cycle

Inactive Publication Date: 2018-04-13
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

Different weight ratios are easy to cause confusion. Downstream manufacturers are prone to wrong weight ratios during use. After the potting glue is cured, it will cause the batch loss of SMD SMD LEDs on the display screen.
[0003] In addition, reflow soldering is a necessary production process in the LED industry. The sealing performance of conventional indoor and outdoor display potting adhesives is average. Most of the display potting adhesives cannot pass reflow soldering at 230°C and then boiled in red ink for 8 hours. experiment of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A single-component single-component epoxy potting adhesive for display screens consists of the following components:

[0040] Epoxy resin (bis ((3,4-epoxycyclohexyl) methyl) adipate) 41g, curing agent (36g methyl hexahydrophthalic anhydride, 15g hexahydrophthalic anhydride), initiator (1.5g 2-ethane base 4-methylimidazole, 1.3g tetrabutylammonium bromide), diluent (0.4g butyl acetate, 1.2g butylene glycol), anti-aging agent (2g triphenyl phosphite, 1g 2,4-di Hydroxybenzophenone), coupling agent (3g γ-(2,3-glycidoxy)propyltrimethoxysilane), filler (1g polymelamine resin, 1g silicon micropowder).

[0041] The single-component display screen epoxy potting glue of this example is prepared by the following method: heating 41 g of bis((3,4-epoxycyclohexyl)methyl)adipate to 80°C, 250rmp / min Stir to dissolve, cool to room temperature, add 36g of methyl hexahydrophthalic anhydride, 15g of hexahydrophthalic anhydride, stir at 400rmp / min, add 0.4g of butyl acetate, 1.2g of butane...

Embodiment 2

[0043] A single-component single-component epoxy potting adhesive for display screens consists of the following components:

[0044]Epoxy resin (33g bis((3,4-epoxycyclohexyl)methyl) adipate, 10g bisphenol A novolac epoxy resin), curing agent (35g methyl hexahydrophthalic anhydride, 14g hexahydrophthalic anhydride ), initiator (1g tetraethylammonium bromide, 1.5g triphenylbutylphosphorus bromide), diluent (0.6g diethylene glycol dibutyl ester, 1.5g butanediol), coupling agent (2.5 g vinyltriethoxysilane), anti-aging agent (2,2'-methylenebis-(4-methyl-6-tert-butylphenol) 3g, 2,4-dihydroxybenzophenone 0.8 g), filler (1.2g polymelamine resin, 1.5g silica powder).

[0045] The single-component display screen epoxy potting glue of this embodiment is prepared by the following method: 33g of bis((3,4-epoxycyclohexyl)methyl)adipate, bisphenol A novolac epoxy Heat 10g of resin to 80°C, stir at 250rmp / min to dissolve, cool to room temperature, add 35g of methyl hexahydrophthalic anhydr...

Embodiment 3

[0047] A single-component display screen epoxy potting glue consists of the following components:

[0048] Epoxy resin (bis((3,4-epoxycyclohexyl) methyl) adipate 29g, 8g bisphenol A type novolac epoxy resin), curing agent (56g modified anhydride), initiator (2.2g Triphenylmethylphosphorus bromide), diluent (1.2g acetyl tributyl citrate, 2g glycerol), coupling agent (3.5g trimethoxy octyl glycidyl ether silane), anti-aging agent ( 2,2'-methylenebis-(4-methyl-6-tert-butylphenol) 2.5g, 1.2g tridecyl phosphite), filler (0.8g polymelamine resin, 1.6g silica powder).

[0049] The single-component display screen epoxy potting glue of this embodiment is prepared by the following method: 29 g of bis((3,4-epoxycyclohexyl) methyl) adipate, bisphenol A novolac epoxy Heat 8g of resin to 80°C, stir at 250rmp / min to dissolve, cool to room temperature, add 56g of modified anhydride, stir at 400rmp / min, add 1.2g of acetyl tributyl citrate, 2g of glycerin, add coupling agent trimethyl Oxyocty...

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Abstract

The invention discloses a single-liquid type display screen epoxy pouring sealant and a preparation method thereof, and belongs to the field of electronic element pouring. The single-liquid type display screen epoxy pouring sealant is prepared from the following components in parts by weight: 7 to 42 parts of epoxy resin, 20 to 55 parts of a curing agent, 0.1 to 5 parts of an initiator, 0.3 to 3.5parts of a diluent, 0.5 to 5 parts of a coupling agent, 1 to 4 parts of an anti-aging agent and 0.5 to 3 parts of a filler. The single-liquid type display screen epoxy pouring sealant disclosed by the invention is subjected to reflow soldering at 230 DEG C, and then is stewed in red ink for 8 hours, but no red ink immerges into the pouring sealant. The single-liquid type display screen epoxy pouring sealant disclosed by the invention can avoid a wrong sealant mixing proportion caused by a client, and is excellent in heat resistance and ultraviolet aging resistance, stable in low-temperature storage and long in service life.

Description

technical field [0001] The invention belongs to the field of potting materials for electronic components, in particular to a single-liquid display screen epoxy potting glue and a preparation method thereof. Background technique [0002] At present, the potting glue used for indoor and outdoor display screens in the market is mainly two-component type. In order to achieve the best performance of each model, the weight ratio of resin and curing agent for various types of products is various, such as: 100:95, 100:100, 100:125, 100:130, 100:140, etc. Different weight ratios are easy to cause confusion, and downstream manufacturers are prone to wrong weight ratios during use. After the potting glue is cured, it will cause batch loss of SMD SMD LEDs on the display screen. [0003] In addition, reflow soldering is a necessary production process in the LED industry. The sealing performance of conventional indoor and outdoor display potting adhesives is average. Most of the display ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09J11/06C09J11/08
CPCC08L2201/08C08L2203/206C08L2205/025C08L2205/03C08L2205/035C09J11/06C09J11/08C09J163/00C08L61/28C08L83/04C08K5/526C08K5/132C08L63/00C08K5/13C08K5/524C08K5/3475
Inventor 张云柱庄小媚黄仁杰郑长利
Owner 广州惠利电子材料有限公司
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