Low-viscosity display screen flame-retardant surface mounting pouring sealant

A technology of display screen and potting glue, which is applied in the field of potting glue, can solve problems such as insufficient viscosity, poor fluidity, and small stress, and achieve good flame retardant effect, good insulation performance, and low oil absorption value.

Inactive Publication Date: 2018-02-06
广东和天新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the commonly used types of potting glue include: epoxy resin and silica gel. Silicone is obviously better than epoxy resin because of its high light transmittance, high refractive index, good thermal stability, small stress and low moisture absorption. It is widely used in high-power LED packaging, making LED display screens gradually develop towards higher brightness, longer life, and better uniformity and stability of luminescence. Shockproof, flame-retardant and heat-conducting, and improving the stability of the module, the existing potting silica gel used for potting the lamp beads with a spacing of less than 4mm is usually not low enough in viscosity and has poor flowability, resulting in the glue not being able to quickly immerse into electronic components. However, the phenomenon of bubbling will affect the construction progress, and the existing potting compound cannot meet the flame retardant grade of UL94V0, so it cannot meet the corresponding construction requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Put 30g of hydroxyl-terminated polydimethylsiloxane, 25g of melamine cyanurate, 17.5g of aluminum hydroxide, and 6g of white carbon black into the reaction kettle with agitator in sequence, and start high-speed stirring by feeding nitrogen gas at room temperature , the stirring speed is 1200 rpm, and the stirring time is 2 hours. After the high-speed stirring is completed, the stirring material in the reactor is cooled to room temperature, and 15g of white electric oil is put in, and the low-speed stirring is carried out again. After stirring evenly, use a 120-mesh filter to filter out material, to obtain the A component; in the reaction kettle with a stirrer, 3 g of γ-aminopropyltriethoxysilane, 3 g of tetraethyl orthosilicate, and 0.5 g of dibutyltin dilaurate are sequentially put into the reactor, Introduce nitrogen at room temperature and start stirring at a low speed. After stirring evenly, the B component is obtained; before the A component and the B component are ...

Embodiment 2

[0019] 40g of hydroxyl-terminated polydimethylsiloxane, 35g of melamine cyanurate, 25g of aluminum hydroxide, and 15g of white carbon black were sequentially put into a reaction kettle with a stirrer, and nitrogen gas was introduced at room temperature to start high-speed stirring. The stirring speed is 1200 r / min, and the stirring time is 2 hours. After the high-speed stirring is completed, the stirring material in the reactor is cooled to room temperature, and 15g of white electric oil is put in, and the low-speed stirring is carried out again. After stirring evenly, use a 120-mesh filter to filter the material. , to obtain the A component; put 5 g of γ-aminopropyltriethoxysilane, 5 g of ethyl orthosilicate, and 1 g of dibutyltin dilaurate into a reaction kettle with a stirrer in sequence, at room temperature Under nitrogen, start stirring at a low speed. After stirring evenly, the B component can be obtained; before the A component and the B component are mixed, the A compon...

Embodiment 3

[0021] Add 20 g of hydroxyl-terminated polydimethylsiloxane, 15 g of melamine cyanurate, 10 g of aluminum hydroxide, and 2 g of white carbon black in sequence into a reaction kettle with a stirrer, and start high-speed stirring by feeding nitrogen gas at room temperature. The stirring speed is 1200 r / min, and the stirring time is 2 hours. After the high-speed stirring is completed, the stirring material in the reactor is cooled to room temperature, and 15g of white electric oil is put in, and the low-speed stirring is carried out again. After stirring evenly, use a 120-mesh filter to filter the material. , to obtain the A component; put 1 g of γ-aminopropyltriethoxysilane, 1 g of ethyl orthosilicate, and 0 g of dibutyltin dilaurate into a reaction kettle with a stirrer in sequence, at room temperature Under nitrogen, start stirring at a low speed. After stirring evenly, the B component can be obtained; before the A component and the B component are mixed, the A component needs ...

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Abstract

The invention discloses the technical field of a pouring sealant, and particularly relates to the field of a low-viscosity display screen flame-retardant surface mounting pouring sealant. The low-viscosity display screen flame-retardant surface mounting pouring sealant is prepared from an ingredient A and an ingredient B according to the ratio of 10:1, wherein the ingredient A is prepared from hydroxyl-terminated polydimethylsiloxane, melamine cyanurate, aluminum hydroxide, white carbon black and white gas; the ingredient B is prepared from gamma-aminopropyltriethoxysilane, tetraethoxysilane and dibutyltin dilaurate; the melamine cyanurate and the aluminum hydroxide are matched to be used as flame-retardant agents; the flame-retardant stage of UL94V0 can be reached at low consumption; thecorresponding construction requirements can be met; the white gas is used as diluents, and can fast reduce the glue liquid viscosity; no influence on lamp beads, printed circuit boards and LED masks is caused, so that the glue liquid circulation performance is good; the pouring and sealing can be convenient; a phenomenon of bubbling since glue liquid cannot fast immerge into electronic devices canbe avoided.

Description

technical field [0001] The invention relates to the technical field of potting glue, in particular to a low-viscosity display screen flame-retardant surface-mounting potting glue. Background technique [0002] At present, the commonly used types of potting glue include: epoxy resin and silica gel. Silicone is obviously better than epoxy resin because of its high light transmittance, high refractive index, good thermal stability, small stress and low moisture absorption. It is widely used in high-power LED packaging, making LED display screens gradually develop towards higher brightness, longer life, and better uniformity and stability of luminescence. Shockproof, flame-retardant and heat-conducting, and improving the stability of the module, the existing potting silica gel used for potting the lamp beads with a spacing of less than 4mm is usually not low enough in viscosity and has poor flowability, resulting in the glue not being able to quickly immerse into electronic comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J11/04C09J11/06
CPCC08K3/36C08K5/34924C08K5/544C08K13/02C08K2003/2227C09J11/04C09J11/06C09J183/06
Inventor 杨鑫
Owner 广东和天新材料科技有限公司
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