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Naphthyl ultrahigh-refractive-index LED packaging silicone

A technology of LED packaging and silica gel, applied in adhesives, polymer adhesive additives, adhesive additives, etc., can solve the problems of optical resins such as unsatisfactory transparency, poor stability, and long polymerization induction period, and achieve visible light transmittance Good, excellent vulcanization resistance, good storage stability

Inactive Publication Date: 2017-05-10
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the refractive index of high-refractive index LED packaging silicone materials can reach between 1.50 and 1.55, which has a certain gap with the chip refractive index (2-4). If the refractive index difference is too large, total reflection will occur, and the light will be reflected back. Therefore, it is necessary to increase the refractive index of the packaging material, which can reduce the occurrence of total reflection, thereby improving the light extraction efficiency
[0004] There are many ways to increase the refractive index of polymers, usually by introducing atoms or groups with high molar refractive index (such as sulfur atoms, halogens, condensed ring structures, etc.) Inorganic nanoparticles (TiO 2 , ZrO 2 , ZnS, etc.), but most methods are not suitable for packaging LED
The specific manifestations are as follows: (1) Among the ethylenic optical resins of sulfur-containing resins, vinyl monomers have poor activity and a long polymerization induction period; episulfide compounds have poor stability due to the large tension of the three-membered sulfur ring, and are difficult to Storage; (2) The transparency of polyimide and optical resin containing fluorene structure is not ideal, and the processing temperature is very high; (3) The weather resistance of halogen-containing resin is poor, it is easily affected by light and heat and changes color, and it violates the requirements of environmental protection (4) There are stability and transparency problems in inorganic nanoparticle composite optical resins, which are often used as thin film coatings, and it is difficult to form bulk materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of component A: Weigh 24g of vinyl resin (m=6, n=0 in structural formula), 17g of crosslinking agent (x=0, y=3.5 in structural formula), 0.10g of inhibitor ethynyl cyclohexanol, Adhesive (n in the structural formula 1 = 2, n 2 =0,n 3 =2) 1.82g was added into the blender one by one, flushed with nitrogen, mixed and stirred evenly, and the A component was obtained.

[0037] Preparation of component B: Weigh 6 g of methylphenyl-terminated vinyl silicone oil with a viscosity of 1200 mPa.s, 2 g of vinyl resin (m=6, n=0 in the structural formula), platinum-vinyl siloxane complex ( Platinum content is 5000ppm) 0.10g, add into the mixer one by one, flush with nitrogen, mix and stir evenly, and obtain the B component.

[0038] When in use, mix the above-mentioned components A and B evenly in a weight ratio of 10:1, remove the air bubbles in the glue in a vacuum, dispense or pour glue on the parts to be packaged, and heat at 80°C for 1 hours, and then heated at 15...

Embodiment 2

[0041] Preparation of component A: Weigh 60 g of vinyl resin (m=3, n=2 in structural formula), 55 g of crosslinking agent (x=1, y=2 in structural formula), 0.15 g of inhibitor ethynyl cyclohexanol, Adhesive (n in the structural formula 1 = 2, n 2 =0,n 3 = 2) 4.00g was added into the mixer in turn, flushed with nitrogen, mixed and stirred evenly, and the A component was obtained.

[0042] Preparation of component B: Weigh 15 g of methylphenyl-terminated vinyl silicone oil with a viscosity of 500 mPa.s, 5 g of vinyl resin (m=3, n=2 in the structural formula), platinum-vinyl siloxane complex ( Platinum content is 3000ppm) 0.20g, add into the mixer one by one, flush with nitrogen, mix and stir evenly, and obtain the B component.

[0043] When in use, mix the above-mentioned components A and B evenly in a weight ratio of 10:1, remove the air bubbles in the glue in a vacuum, dispense or pour glue on the parts to be packaged, and heat at 80°C for 1 hours, and then heated at 150°C...

Embodiment 3

[0046]Preparation of component A: Weigh 38g of vinyl resin (m=8, n=0 in structural formula), 15g of crosslinking agent (x=1.5, y=0.5 in structural formula), 0.10g of inhibitor ethynyl cyclohexanol, Adhesive (n in the structural formula 1 = 2, n 2 =0,n 3 =0) 1.5g, put into the blender one by one, flush with nitrogen, mix and stir evenly to obtain the A component.

[0047] Preparation of component B: Weigh 6 g of methylphenyl-terminated vinyl silicone oil with a viscosity of 300 mPa.s, 3 g of vinyl resin (m=8, n=0 in the structural formula), platinum-vinyl siloxane complex ( Platinum content is 5000ppm) 0.10g, add into the mixer one by one, flush with nitrogen, mix and stir evenly, and obtain the B component.

[0048] When in use, mix the above-mentioned components A and B evenly in a weight ratio of 10:1, remove the air bubbles in the glue in a vacuum, dispense or pour glue on the parts to be packaged, and heat at 80°C for 1 hours, and then heated at 150°C for 3 hours.

[...

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Abstract

The invention relates to naphthyl ultrahigh-refractive-index LED packaging silicone and a preparation method thereof. The naphthyl ultrahigh-refractive-index LED packaging silicone is prepared from a component A and a component B with a weight ratio of 10 to 1, wherein the component A is prepared from the following raw materials in parts by weight: 45 to 75 parts of vinyl resin, 30 to 55 parts of cross-linking agent, 0.08 to 0.20 part of inhibitor and 2 to 5 parts of adhesive; the component B is prepared from the following raw materials in parts by weight: 60 to 80 parts of vinyl silicone oil, 20 to 30 parts of vinyl resin and 0.05 to 0.20 part of catalyst. The naphthyl ultrahigh-refractive-index LED packaging silicone has a refractive index over 1.56, the refractive index is mainly 1.57 to 1.62, the adhesive property is good for various LED base materials, after colloid is cured, the hardness is wider in range, and can reach Shore 30D to 75D, the vulcanization resistance is excellent, the reliability is good, and the visible light transmittance is good; the silicone is convenient and easy to operate, and is good in storage stability.

Description

technical field [0001] The invention relates to an ultra-high-fold LED packaging silica gel and a preparation method thereof, belonging to the technical field of adhesives. Background technique [0002] Semiconductor lighting based on LED technology has the characteristics of high efficiency, energy saving, environmental protection, long life, and easy maintenance, and is known as a new light source in the 21st century. However, with the development of high-power LED devices, new requirements are put forward for the refractive index and reliability of packaging materials. [0003] At present, the refractive index of high-refractive index LED packaging silicone materials can reach between 1.50 and 1.55, which has a certain gap with the chip refractive index (2-4). If the refractive index difference is too large, total reflection will occur, and the light will be reflected back. Therefore, it is necessary to increase the refractive index of the packaging material to reduce th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/07C09J11/08
CPCC09J183/04C08L2203/206C08L2205/025C08L2205/035C09J11/08C08L83/04C08L83/06
Inventor 姜云陈维
Owner YANTAI DARBOND TECH
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