A kind of silicone potting glue and preparation method thereof

A technology of silicone potting glue and base glue, applied in adhesives, non-polymer adhesive additives, photovoltaic power generation, etc., can solve the problems of silicone potting glue difficulties, poor mechanical properties, poor flame retardancy, etc. To achieve the effect of improving the outdoor service life, good protection, and good leveling

Active Publication Date: 2022-06-07
广州硅芯材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the silicone potting adhesives commonly used in the market are made of high-viscosity 107 silicone rubber and white carbon black and other reinforcing fillers to produce the base rubber, using ethyl orthosilicate, propyl orthosilicate, methyl triethyl Oxysilane and other non-aryl cross-linking agents, add a large amount of 201 methyl silicone oil or white oil as a diluent for silicone potting adhesives, these substances do not undergo cross-linking reactions during the curing process of the colloid, and when exposed to UV for a long time After being exposed for a long time, it will degrade and become sticky, and lose its protective effect on the PCB board, resulting in a short service life of the LED display; for example, the mechanical properties and thermal conductivity of silicone rubber without filling and reinforcement are poor, and the thermal conductivity is only 0.27W / (m·K), and the flame retardant performance is poor, which cannot meet the specific requirements of potting and sealing of LED small-pitch displays
It is particularly difficult to prepare silicone potting adhesives with good leveling properties and high UV resistance
So far, similar products on the market are rare

Method used

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  • A kind of silicone potting glue and preparation method thereof
  • A kind of silicone potting glue and preparation method thereof
  • A kind of silicone potting glue and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0033] The preparation method of the above-mentioned silicone potting glue comprises the following steps:

[0034] (1) Add the double-ended hydroxyl polydisiloxane B and the semi-reinforcing filler into the dispersion container, heat up to 110-125°C and blend for 30-90 minutes. , to obtain base glue;

[0035] (2) adding the base glue obtained in step (1), double-terminated hydroxyl polydisiloxane A, liquid MQ resin, plasticizer A, pigment and deep curing agent into the high-speed dispersing kettle, stirring uniformly, evacuating and cooling, Component A can be obtained;

[0036] (3) adding the crosslinking agent, the coupling agent, the organotin catalyst and the plasticizer B to the kettle, stirring uniformly, and after ageing, filtering out the precipitate to obtain the component B;

[0037] (4) Mix component A and component B uniformly, and obtain silicone potting compound after defoaming.

[0038] Preferably, the mass ratio of the base gum to the double-ended hydroxyl pol...

Embodiment 1

[0045] A silicone potting glue, the preparation raw materials of which include component A and component B, and the preparation raw materials of component A include, in parts by mass: 100 parts by mass of base glue, 28.6 parts by mass of double-terminated hydroxyl polydisiloxane A parts by mass, 12.8 parts by mass of liquid MQ resin, 9.6 parts by mass of dimethyl silicone oil (viscosity 100 mPa.s), 1.3 parts by mass of carbon black slurry and 1.2 parts by mass of deep curing agent; the raw materials for the preparation of component B are in parts by mass Including: 40 parts by mass of phenyltrimethoxysilane, 20 parts by mass of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, 0.5 parts by mass of dibutyltin dilaurate, 100 parts by mass of dimethyl Silicone oil (viscosity 100mPa.s); the raw materials for the preparation of the base glue include: double-terminated hydroxyl polydisiloxane B and aluminum hydroxide, and the mass ratio of the two is 100:180. The viscosity of the doub...

Embodiment 2

[0052] A silicone potting glue, the preparation raw materials of which include component A and component B, and the preparation raw materials of component A include, in parts by mass: 100 parts by mass of base glue, 28.6 parts by mass of double-terminated hydroxyl polydisiloxane A parts by mass, 12.8 parts by mass of liquid MQ resin, 9.6 parts by mass of dimethyl silicone oil (viscosity 100 mPa.s), 1.3 parts by mass of carbon black slurry and 1.2 parts by mass of deep curing agent; the raw materials for the preparation of component B are in parts by mass Including: 35 parts by mass of phenyltrimethoxysilane, 20 parts by mass of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane, 0.5 parts by mass of dibutyltin dilaurate, 100 parts by mass of dimethyl Silicone oil (viscosity 100 mPa.s); the raw materials for the preparation of the base glue include: double-terminated hydroxyl polydisiloxane B and aluminum hydroxide, and the mass ratio of the two is 100:180. The viscosities of the d...

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Abstract

The invention relates to the technical field of polymer materials, in particular to a silicone potting glue and a preparation method thereof. The silicone potting glue of the present invention, its preparation raw material comprises component A and component B, and the preparation raw material of described component A comprises: 100 parts of base rubber, double-terminated hydroxyl polydisiloxane A 20- 100 parts, 6-12.8 parts of liquid MQ resin, 0-9.6 parts of plasticizer A, 1.3 parts of pigment and 1.2 parts of deep curing agent; the raw materials for the preparation of component B include: 100 parts of plasticizer B in parts by mass , 10-40 parts of crosslinking agent, 5-25 parts of coupling agent and 0.5-2 parts of organic tin catalyst; the viscosity of the double-ended hydroxyl polydimethylsiloxane is 200-750mPa.s; the base The raw materials for the preparation of the glue include double-terminated hydroxyl polydisiloxane B and semi-reinforcing fillers. The organosilicon potting glue of the present invention is a silicone potting glue with good leveling property and high UV resistance, and can be well used in LED small-pitch display screen modules as potting glue.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to an organic silicon potting compound and a preparation method thereof. Background technique [0002] Due to the special silicon-oxygen bond main chain structure, silicone polymer materials have unique weather resistance, aging resistance, excellent high and low temperature resistance, good hydrophobicity, mechanical properties and electrical insulation and other properties, so they are widely used in Potting protection of electronic and electrical components. [0003] With the development of the electronics industry, high-tech technologies such as electronic components and large integrated circuit boards tend to be denser and miniaturized. For example, LED small-pitch displays, LED displays with a dot pitch of less than 2.5mm, the thicker the potting. getting thinner. This requires that the potting material not only has good fluidity, excellent high and low temperature...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J183/04C09J11/04C09J11/06
CPCC09J183/04C09J11/04C09J11/06C08K2003/2227C08L2205/035C08L2205/025C08L2203/206C08L2201/08C08L83/04C08K3/22C08K3/04C08K5/5419C08K5/544C08K13/02Y02E10/50
Inventor 陈循军尹国强胡巧玲葛建芳
Owner 广州硅芯材料科技有限公司
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