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Anti-phosphor deposition high thixotropic LED (light-emitting diode) jelly glue

A phosphor and thixotropic technology, applied in luminescent materials, electrical components, circuits, etc., can solve problems such as unfavorable operation, obvious agglomeration, viscosity thickening, etc., to solve color temperature deviation, simplify packaging process, and high plasticity. Effect

Active Publication Date: 2015-04-22
深圳市晨日科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After adding silica, its thixotropy is obviously improved. With the increase of the addition amount, the thixotropy index becomes larger and the thixotropy becomes better. Conducive to operation

Method used

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  • Anti-phosphor deposition high thixotropic LED (light-emitting diode) jelly glue
  • Anti-phosphor deposition high thixotropic LED (light-emitting diode) jelly glue
  • Anti-phosphor deposition high thixotropic LED (light-emitting diode) jelly glue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The preparation process of jelly glue is as follows:

[0046] (1) Preparation of coupling agent KH560 hydrolyzate: Mix 5mL methanol and 45mL distilled water evenly, add 0.1g (2g / L) glycerol dropwise to the system, adjust the pH of the solution to 4 with acetic acid, then add 5mL KH560 , magnetically stirred at room temperature for 2 h. The measured conductivity is 90 μS / cm, which proves that the above hydrolysis method can fully hydrolyze the coupling agent.

[0047] (2) Treatment of fumed silica: Take 100g Wacker H30 in a round bottom flask, add 100 mL toluene and 1g coupling agent hydrolyzate prepared in step (1), stir and reflux at 110°C for 3h. After the reaction was completed, the toluene was removed by rotary evaporation under reduced pressure, and dried overnight in an oven at 60°C.

[0048] (3) Modification of aluminate phosphor YAG-04 (Intermatix, USA): Weigh 7.8g of YAG-04, add 15mL of distilled water, and ultrasonically disperse for 9 minutes to obtain a YA...

Embodiment 2

[0053] (1) Preparation of coupling agent KH560 hydrolyzate: Mix 15mL methanol and 80mL distilled water evenly, add 0.3g glycerol dropwise to the system, adjust the pH of the solution to 2 with acetic acid, then add 5mL KH560, and stir magnetically at room temperature 3h. Its conductivity was measured to be 88 μS / cm, which proved that the above hydrolysis method can fully hydrolyze the coupling agent.

[0054] (2) Treatment of fumed silica: Take 200g Wacker H20 in a round bottom flask, add 250mL methanol and 1g KH560 hydrolyzate prepared in step (1), stir and reflux at 120°C for 2h. After the reaction was completed, methanol was removed by rotary evaporation under reduced pressure, and dried overnight in an oven at 60°C.

[0055] (3) Modification of aluminate phosphor YAG-04 (Intermatix, USA): Weigh 4.5g of YAG-04, add 15mL of distilled water, and ultrasonically disperse for 9 minutes to obtain a YAG-04 solution; then dropwise add 0.3g of the step (1 ) prepared KH560 hydrolyz...

Embodiment 3

[0060] (1) Preparation of coupling agent KH570 hydrolyzate: Mix 15mL methanol and 80mL distilled water evenly, add 0.3g glycerol dropwise to the system, adjust the pH of the solution to 2 with acetic acid, then add 5mL KH570, and stir magnetically at room temperature 3h. Its conductivity was measured to be 85μS / cm, proving that the above hydrolysis method can fully hydrolyze the coupling agent.

[0061] (2) Treatment of fumed silica: Take 200g Cabot TS720 in a round bottom flask, add 250mL xylene and 1g KH570 hydrolyzate prepared in step (1), stir and reflux at 120°C for 2h. After the reaction was completed, xylene was removed by rotary evaporation under reduced pressure, and dried overnight in an oven at 60°C.

[0062] (3) Modification of silicate phosphor O5742 (Intermatix, USA): Weigh 4.5g of O5742, add 15mL of distilled water, and ultrasonically disperse for 9 minutes to obtain O5742 solution; then add dropwise 0.3g of KH570 hydrolyzate prepared in step (1) , magneticall...

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Abstract

The invention discloses a highly thixotropic LED jelly glue for preventing fluorescent powder from settling. In the present invention, by optimizing the coupling agent and optimizing the hydrolysis conditions, the fumed silicon dioxide is modified to obtain a thixotropic material, and the fluorescent powder is modified to obtain an anti-sedimentation fluorescent powder. Add thixotropic materials to the silica gel system to obtain a highly thixotropic silica gel system with a thixotropic index of up to 5; adding different types and different contents of modified phosphors to the system can integrate jelly gels with different color temperatures. There will be no sedimentation during the 3-month warranty period, and the color temperature value will remain unchanged after packaging. The jelly glue of the present invention is packaged in a syringe without mold assistance, can be directly fixed on a glue dispensing machine for use, and is automatically formed after dispensing. The invention combines the fluorescent powder and the silica gel system to prepare the jelly glue, which can save the mold packaging step in the LED packaging link, simplify the downstream packaging process, shorten the production cycle, improve the production efficiency, and have good application prospects.

Description

technical field [0001] The invention belongs to the technical field of LED packaging, in particular to a highly thixotropic LED jelly glue for preventing fluorescent powder from settling. Background technique [0002] As we all know, in the phosphor powder dispensing process in LED packaging, the phosphor powder and silica gel purchased separately need to be mixed evenly in proportion to prepare fluorescent glue. Phosphor powder is a solid particle with a particle size of about 7-25 μm. The viscosity of conventional two-component addition silica gel is between 2000-6000cps. Due to the large particle size of the phosphor powder and the low viscosity of the silica gel, the phosphor powder is prone to sedimentation in the silica gel system, and it usually needs to be used up within half an hour. If the mixing time is too long, the phosphor powder will settle, which will directly affect the optical consistency of the LED package, that is, the color temperature consistency and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06C09K11/02C09C1/28C09C3/08H01L33/56H01L33/50
Inventor 刘洋钱雪行王本智韩英肖建香蒋剑涛
Owner 深圳市晨日科技股份有限公司
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