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Single-component dealcoholized and room temperature vulcanized organosilicone pouring sealant for leds and preparation method

A room temperature vulcanization and dealcoholization technology, applied in chemical instruments and methods, dyed low molecular organic compound treatment, adhesives, etc., can solve the problems of inconvenient operation, easy powdering, insufficient adhesion, etc., and achieve good economic benefits. and social benefits, the process is simple and feasible, and the effect of excellent flow performance

Inactive Publication Date: 2015-03-25
GUANGXI HUANA NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vulcanization of two-component addition type silicone rubber depends on the temperature, and the vulcanization speed can be adjusted by temperature; the disadvantage of two-component rubber is that the two components must be fully mixed according to the measurement before use, and the operation is inconvenient
One-component dealcoholized room temperature vulcanized silicone rubber, as a general-purpose electronic and electrical potting product, has excellent electrical properties and aging resistance, but has disadvantages such as long wire drawing during construction, low room temperature deep curing, and easy pulverization at high temperatures.
[0006] Chinese patent CN102115604A provides a condensation-type silicone transparent electronic potting compound, which contains a catalyst in the A component, and the hydroxyl group of the polysiloxane undergoes self-condensation under the action of the catalyst, so the viscosity of the A component increases during storage. Problems that even affect curing speed
Chinese patent CN101787211A provides a high-transparency, high-strength room-temperature-vulcanized silicone electronic potting adhesive, and the single use of γ-aminopropyltriethoxysilane as a tackifier has the disadvantage of insufficient adhesion
The above existing technologies are all two-component adhesives, which have the disadvantage of inconvenient construction and operation.
Chinese patent CN101565599 is a one-component deketoxime type potting glue and its preparation method. This patent does not involve the bonding performance of silicone glue and the pulverization under high temperature conditions

Method used

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  • Single-component dealcoholized and room temperature vulcanized organosilicone pouring sealant for leds and preparation method
  • Single-component dealcoholized and room temperature vulcanized organosilicone pouring sealant for leds and preparation method
  • Single-component dealcoholized and room temperature vulcanized organosilicone pouring sealant for leds and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Use 2.5% polyethylene glycol fatty acid ester (calcium carbonate total amount) to carry out secondary dry process to nano-calcium carbonate by conventional method.

[0032] 2. Mix 100 parts of α, ω-dihydroxypolydimethylsiloxane with a viscosity of 2000mPa·s, 15 parts of dry-processed nano-calcium carbonate, 5 parts of calcium chloride, 5 parts of white carbon black and 8 parts of viscosity Put the 200mPa·s simethicone oil into the high-speed disperser, stir evenly, and at the same time evacuate to -0.09MPa, heat to 90°C, and disperse at a speed of 1000rpm in the high-speed disperser for 100min.

[0033] 3. Cool the high-speed disperser to 35°C with cooling water, release the vacuum with nitrogen, add 4 parts of the mixture of methyltrimethoxysilane and ethyltrimethoxysilane, stir evenly, continue to vacuum, and keep the vacuum at - 0.095MPa, high-speed dispersion for 30min.

[0034] 4. Blow nitrogen to release the vacuum, add 2 parts of the mixture of γ-aminopropylt...

Embodiment 2

[0037]1. Use 2.5% fatty acid treatment agent (calcium carbonate total amount) to carry out secondary dry process to nanometer calcium carbonate by conventional method.

[0038] 2. Mix 100 parts of α, ω-dihydroxypolydimethylsiloxane with a viscosity of 2000mPa·s, 15 parts of dry-processed nano-calcium carbonate, 5 parts of calcium chloride, 5 parts of white carbon black and 8 parts of viscosity Put the 200mPa·s simethicone oil into the high-speed disperser, stir evenly, and at the same time evacuate to -0.09MPa, heat to 90°C, and disperse at a speed of 1000rpm in the high-speed disperser for 100min.

[0039] 3. Cool the high-speed disperser to 35°C with cooling water, release the vacuum with nitrogen, add 4 parts of the mixture of methyltrimethoxysilane and ethyltrimethoxysilane, stir evenly, continue to vacuum, and keep the vacuum at - 0.095MPa, high-speed dispersion for 30min.

[0040] 4. Blow nitrogen to release the vacuum, add 2 parts of the mixture of γ-aminopropyltrietho...

Embodiment 3

[0043] 1. 100 parts of α with a viscosity of 2000mPa·s, ω-dihydroxy polydimethylsiloxane, 15 parts of nano calcium carbonate, 2.5% polyethylene glycol fatty acid ester (calcium carbonate total amount), 5 parts of chlorinated Calcium, 5 parts of white carbon black and 8 parts of simethicone oil with a viscosity of 200mPa·s are placed in a high-speed disperser, stirred evenly, and at the same time, vacuumed to -0.09MPa, heated to 90°C, and dispersed in a high-speed disperser at a speed of 1000rpm 100min.

[0044] 2. Cool the high-speed disperser to 35°C with cooling water, release the vacuum with nitrogen, add 4 parts of the mixture of methyltrimethoxysilane and ethyltrimethoxysilane, stir evenly, continue to vacuum, and keep the vacuum at - 0.095MPa, high-speed dispersion for 30min.

[0045] 3. Blow nitrogen to release the vacuum, add 2 parts of the mixture of γ-aminopropyltriethoxysilane and γ-(2,3-epoxypropane)propyltriethoxysilane, bis(acetylacetone)bis(iso Propoxy) titana...

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Abstract

The invention discloses a single-component dealcoholized and room temperature vulcanized organosilicone pouring sealant for LEDs and a preparation method. The pouring sealant is prepared from the following raw materials in parts by weight: 100 parts of alpha, omega-dihydroxy polydimethyl siloxane with a viscosity of 500-15000 mPa.s, 10-50 parts of dry processed nano calcium carbonate, 1-10 parts of calcium chloride, 5-10 parts of white carbon black, 8-20 parts of dimethicone with a viscosity of 100-5000 mPa.s, 3-10 parts of a cross-linking agent, 0.3-5 parts of a coupling agent, 0.5-8 parts of titanium complex, 0.01-0.5 part of organotin and 0.5-10 parts of a deep vulcanization accelerator. The pouring sealant provided by the invention has an excellent flow property with low thread drawing, the capabilities of anti-pulverization at a high temperature and fast and deep curing, and a good mechanical property; the produced gas has good cohesiveness on the base material without corrosive action; the method is simple and feasible in technology, easy to operate and low in production cost, and has preferable economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of electronic potting materials, in particular to a single-component dealcoholized room temperature vulcanized silicone potting glue for LEDs and a preparation method thereof. Background technique [0002] Potting is the process of rationally arranging, assembling, connecting and isolating and protecting the electronic components from the environment. The function of potting is to strengthen the integrity of electronic components, improve the resistance to external damage, improve the insulation of internal circuits, and improve the waterproof and moisture-proof performance of electronic components. [0003] LED (Light Emitting Diode) is a kind of electroluminescent solid-state device. Because of its high brightness, low heat, long life, non-toxic, recyclable and reusable advantages, it is known as the most promising green lighting source in the 21st century. At present, LED lighting and large-screen LED ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J11/04C09J11/08C09J11/06C09C1/02C09C3/08H01L33/56C09K3/10
Inventor 荣权农红萍朱勇覃玲意莫冬丽玉贵书刘旭增
Owner GUANGXI HUANA NEW MATERIALS TECH CO LTD
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