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Silica gel for white-light LED package and preparation method and application thereof

A technology of LED packaging and silica gel, which is applied in the field of material chemistry, can solve the problems of low film hardness, high phosphor density, and reduced transparency, and achieve good anti-vulcanization performance, high color temperature concentration, and improved transparency.

Inactive Publication Date: 2017-11-03
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

[0004] However, due to the high density of the phosphor powder, it is easy to settle in the packaging material. During the curing process, due to the obvious decrease in the viscosity of the glue, the phosphor powder is prone to deposit and disperse unevenly, resulting in serious color temperature drift and poor concentration of the LED after curing.
At present, people mainly add nano-silica to the silicone material for packaging to improve the thixotropy of the glue, but the refractive index of common silicone materials is usually around 1.41 and 1.54, which is different from the refractive index of nano-silica, which is 1.46. Larger, although the problem of color temperature concentration is solved, the transparency of the system is reduced, resulting in a decrease in the initial luminous flux after LED packaging. If the silicone material of about 1.46 is directly used, and because of its relatively low phenyl content, the cured glue Low film hardness and poor vulcanization resistance

Method used

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  • Silica gel for white-light LED package and preparation method and application thereof
  • Silica gel for white-light LED package and preparation method and application thereof
  • Silica gel for white-light LED package and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] A silica gel for encapsulating white light LEDs, consisting of component A and component B,

[0064] The A component is prepared from the following raw materials in parts by mass:

[0065]

[0066]

[0067] The B component is mainly prepared from the following raw materials in parts by mass:

[0068]

[0069] The mass and number ratio of component A and component B is 1:1.

[0070] The methylphenyl vinyl silicone resin has a refractive index of 1.49 and has the following chemical formula:

[0071] (PhSiO 3 / 2 ) 0.25 (Ph 2 SiO 2 / 2 ) 0.1 (Me 2 SiO 2 / 2 ) 0.5 (ViMe 2 SiO 1 / 2 ) 0.15

[0072] The methylphenyl vinyl silicone oil has a refractive index of 1.49 and has the following chemical formula:

[0073] (PhSiO 3 / 2 ) 0.25 (Ph 2 SiO 2 / 2 ) 0.1 (Me 2 SiO 2 / 2 ) 0.5 (Me 2 SiHO 1 / 2 ) 0.15

[0074] The methylphenyl hydrogen-containing silicone resin has a refractive index of 1.49 and has the following chemical formula:

[0075] (PhSiO 3 / 2 ) 0.2...

Embodiment 2

[0088] A silica gel for encapsulating white light LEDs, consisting of component A and component B,

[0089] The A component is prepared from the following raw materials in parts by mass:

[0090]

[0091] The B component is mainly prepared from the following raw materials in parts by mass:

[0092]

[0093] The mass and number ratio of component A and component B is 1:2.

[0094] The methylphenyl vinyl silicone resin has a refractive index of 1.49 and has the following chemical formula:

[0095] (PhSiO 3 / 2 ) 0.3 (Ph 2 SiO 2 / 2 ) 0.1 (Me 2 SiO 2 / 2 ) 0.4 (ViMe 2 SiO 1 / 2 ) 0.2

[0096] The methylphenyl vinyl silicone oil has a refractive index of 1.49 and has the following chemical formula:

[0097] (PhSiO 3 / 2 ) 0.2 (Ph 2 SiO 2 / 2 ) 0.1 (Me 2 SiO 2 / 2 ) 0.6 (Me 2 SiHO 1 / 2 ) 0.1

[0098] The methylphenyl hydrogen-containing silicone resin has a refractive index of 1.49 and has the following chemical formula:

[0099] (PhSiO 3 / 2 ) 0.3 (Ph 2 SiO 2 / 2...

Embodiment 3

[0112] A silica gel for encapsulating white light LEDs, consisting of component A and component B,

[0113] The A component is prepared from the following raw materials in parts by mass:

[0114]

[0115] The B component is mainly prepared from the following raw materials in parts by mass:

[0116]

[0117] The mass and number ratio of component A and component B is 1:1.

[0118] The methylphenyl vinyl silicone resin has a refractive index of 1.49 and has the following chemical formula:

[0119] (PhSiO 3 / 2 ) 0.25 (Ph 2 SiO 2 / 2 ) 0.05 (Me 2 SiO 2 / 2 ) 0.5 (ViMe 2 SiO 1 / 2 ) 0.2

[0120] The methylphenyl vinyl silicone oil has a refractive index of 1.50 and has the following chemical formula:

[0121] (PhSiO 3 / 2 ) 0.3 (Ph 2 SiO 2 / 2 )0.1 (Me 2 SiO 2 / 2 ) 0.5 (Me 2 SiHO 1 / 2 ) 0.1

[0122] The methylphenyl hydrogen-containing silicone resin has a refractive index of 1.50 and has the following chemical formula:

[0123] (PhSiO 3 / 2 ) 0.4 (Ph 2 SiO 2 / 2...

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Abstract

The invention relates to silica gel for white-light LED package, and belongs to the technical field of material chemistry. The silica gel for the white-light LED package comprises a component A and a component B based at the mass ratio of 1: (1-10), wherein the component A is prepared from methylphenyl vinyl silicone resin, methylphenyl vinyl silicone oil, a tackifier and a catalyst; and the component B is prepared from methylphenyl vinyl silicone resin, methylphenyl hydrosilicone resin, an inhibitor and an inorganic filler. The silica gel for the white-light LED package is high in transparence; fluorescent powder is uniformly dispersed during use; the color-temperature concentration ratio after curing is high; and the sulfidation resistance is high.

Description

technical field [0001] The invention relates to the technical field of material chemistry, in particular to a silica gel for packaging white light LEDs and a preparation method and application thereof. Background technique [0002] There are two main light-emitting principles of white LEDs: one is to use blue-emitting LEDs to excite yellow phosphor powder, that is, the yellow phosphor powder is evenly dispersed in the encapsulation glue and then coated on the surface of blue-emitting LEDs. Although the luminous flux of blue-emitting LEDs is not High, but the luminous flux of white light produced after exciting the yellow phosphor is 8 times stronger than the original one. This process is currently the main method for manufacturing white LEDs; the other is to combine red, green and blue LEDs together , to produce white light by adjusting its luminous ratio, but this method is expensive and not suitable for commercial development. [0003] Luminous flux and color temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08K5/05C08K9/04C08K3/36H01L33/56
CPCC08L83/04C08L2203/204C08L2205/025C08L2205/03H01L33/56C08K5/05C08K9/04C08K3/36
Inventor 韩小兵肖少刚蔡国章郑长利黄仁杰
Owner 广州惠利电子材料有限公司
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