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LED transparent organosilicon pouring sealant with high refractive index and high viscosity and preparation method of LED transparent organosilicon pouring sealant

A silicone potting compound, high refractive index technology, used in polymer adhesive additives, non-polymer adhesive additives, adhesives, etc., can solve the problem of poor refractive index and mechanical properties of silicone materials. , High moisture and oxygen permeability, difficult moisture and oxygen permeability, etc., to achieve the effect of increasing mechanical properties and bonding properties, improving refractive index, and small moisture and oxygen permeability

Inactive Publication Date: 2019-06-07
冯欢心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used potting glue mainly includes epoxy resin potting glue, silicone resin potting glue, and polyurethane potting glue. Compared with other types of potting glue, silicone resin has higher light transmittance and UV resistance, Thermal stability is currently an ideal potting adhesive matrix material. However, the refractive index, mechanical properties and bonding performance of silicone materials are not good, and the moisture permeability and oxygen permeability are large, which is very important for bonding, potting, and sealing. The potting compound for sealing and coating protection is a big defect, and it is difficult to further improve the moisture and oxygen permeability of the silicone material after only adding a coupling agent, etc. to improve the adhesion. Defects largely limit its application in electronic packaging

Method used

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  • LED transparent organosilicon pouring sealant with high refractive index and high viscosity and preparation method of LED transparent organosilicon pouring sealant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: A high refractive index and high viscosity LED transparent silicone encapsulant, which is composed of component one and component two:

[0018] The weight ratio of the component one raw material is: 65 parts of vinyl silicone oil, 20 parts of bleached shellac resin, 6 parts of hydrogen-containing silicone oil, 12 parts of melamine formaldehyde resin, 8 parts of beeswax liquid, and 0.8 parts of trisodium phosphate. Parts, 30 parts of modified gas phase titanium dioxide, the weight ratio of the component two raw materials: 12 parts of vinyl silicone oil and 0.6 parts of platinum catalyst.

[0019] Further, the preparation method of the modified vapor-phase titanium dioxide is: placing the dried vapor-phase titanium dioxide and vapor-phase aluminum oxide in a NaOH solution with a concentration of 10 mol / L, stirring and heating to 60° C., adding under heat preservation and stirring The epichlorohydrin solution with a mass ratio of 5:1 to the gas phase titanium dioxide...

Embodiment 2

[0026] Example 2: A high refractive index and high viscosity LED transparent silicone encapsulant, which is composed of component one and component two:

[0027] The weight ratio of the component one raw material is: 60 parts of vinyl silicone oil, 15 parts of bleached shellac resin, 5 parts of hydrogen-containing silicone oil, 8 parts of melamine formaldehyde resin, 5 parts of beeswax liquid, and 0.5 parts of trisodium phosphate. 15 parts by weight of modified gas phase titanium dioxide. The weight ratio of the two raw materials is: 10 parts of vinyl silicone oil and 0.4 parts of platinum catalyst.

[0028] Further, the preparation method of the modified gas phase titanium dioxide is the same as that of Example 1.

[0029] The method for preparing a high refractive index and high viscosity LED transparent silicone encapsulant includes the following steps:

[0030] (1) Mix bleached shellac resin and trisodium phosphate and heat to 80°C, keep warm and stir evenly;

[0031] (2) The beesw...

Embodiment 3

[0035] Example 3: A high refractive index and high viscosity LED transparent silicone encapsulant, which is composed of component one and component two:

[0036] The weight ratio of the component one raw materials is: 70 parts of vinyl silicone oil, 25 parts of bleached shellac resin, 8 parts of hydrogen-containing silicone oil, 15 parts of melamine formaldehyde resin, 10 parts of beeswax liquid, and 1 part of trisodium phosphate. Parts, 40 parts of modified gas phase titanium dioxide, the weight ratio of the second component: 15 parts of vinyl silicone oil and 0.8 parts of platinum catalyst.

[0037] Further, the preparation method of the modified gas phase titanium dioxide is the same as that of Example 1.

[0038] The method for preparing a high refractive index and high viscosity LED transparent silicone encapsulant includes the following steps:

[0039] (1) Mix bleached shellac resin and trisodium phosphate and heat to 90°C, keep warm and stir evenly;

[0040] (2) The beeswax liqu...

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Abstract

The invention discloses an LED transparent organosilicon pouring sealant with a high refractive index and high viscosity. The LED transparent organosilicon pouring sealant is composed of a first component and a second component, wherein the first component comprises the raw materials: in parts by weight, 60-70 parts of vinyl silicone oil, 15-25 parts of bleached lac resin, 5-8 parts of hydrogen-containing silicone oil, 8-15 parts of melamine formaldehyde resin, 5-10 parts of beeswax liquid, 0.5-1 part of trisodium phosphate and 15-40 parts of modified fumed titanium dioxide, and the second component comprises the raw materials: in parts by weight, 10-15 parts of vinyl silicone oil and 0.4-0.8 part of a platinum catalyst. The invention discloses a preparation method of the LED transparent organosilicon pouring sealant with a high refractive index and high viscosity. The LED transparent organosilicon pouring sealant with a high refractive index and high viscosity has a high refractive index, good mechanical properties and bonding performance on the basis of good light transmittance.

Description

Technical field [0001] The invention relates to the technical field of adhesives and preparation, in particular to a LED transparent organosilicon potting glue with high refractive index and high viscosity and a preparation method thereof. Background technique [0002] Potting glue is used for bonding, potting, sealing and coating protection of electronic components. The potting glue is fluid and liquid before curing. The viscosity of the glue varies according to the material, performance and production process of the product. After curing, the potting glue can realize its use value. After curing, it can play the role of waterproof, moisture-proof, insulation, dustproof, heat conduction, confidentiality, temperature resistance, corrosion resistance, shock resistance, etc. It has been widely used in electronic device manufacturing , Is an important processing material indispensable for the electronics industry. [0003] The LED, known as the fourth-generation light source, has the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/07C09J193/02C09J183/05C09J191/06C09J11/04C09J11/08
Inventor 冯欢心
Owner 冯欢心
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