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Flame-proof silicone sealant for electronics and its production method

A technology of silicone sealant and manufacturing method, which is applied in the direction of chemical instruments and methods, adhesives, and other chemical processes, which can solve the problems of polymer performance degradation, interface defects, and high surface energy, and achieve mechanical and electrical properties. Improvement , Inhibition of smoke and hydrogen chloride formation, and the effect of improving flame retardancy

Active Publication Date: 2006-11-22
浙江凌志新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase of the specific surface area of ​​the particles will lead to high surface energy, and it is easy to aggregate into agglomerates, so that the binding ability with the polymer is extremely poor, and it is easy to cause interface defects, resulting in a large decrease in the performance of the polymer.

Method used

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  • Flame-proof silicone sealant for electronics and its production method
  • Flame-proof silicone sealant for electronics and its production method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0072] Example 1: Add 200 parts by weight of α, ω-dihydroxy polydimethylsiloxane with a viscosity of 20 Pa.s at 25°C, and 200 parts of surface-treated magnesium hydroxide and aluminum hydroxide composite powder into the kneader At a temperature of 150°C, knead and dehydrate for 360 minutes, and obtain a base material after cooling. At room temperature, add the base material into the planetary mixer, then add 2 parts of polydimethylsiloxane, 8 parts of methyltrimethoxysilane, 4 parts of γ-aminopropyltriethoxysilane, iso-titanate Add 3 parts of propyl ester into the planetary mixer together with the base material and carry out a chemical reaction with a vacuum degree of 0.08MPa and a rotation speed of 80 rpm for 4 hours to make an electronic flame-retardant silicone sealant. The product performance test results are shown in Table 1.

example 2

[0074] Example 2: Add 200 parts by weight of α, ω-dihydroxy polydimethylsiloxane with a viscosity of 20 Pa.s at 25°C, and 150 parts of surface-treated magnesium hydroxide and aluminum hydroxide composite powder into the kneader At a temperature of 150°C, knead and dehydrate for 360 minutes, and obtain a base material after cooling. At room temperature, add the base material into the planetary mixer, then add 2 parts of polydimethylsiloxane, 8 parts of methyltrimethoxysilane, 4 parts of γ-aminopropyltriethoxysilane, iso-titanate Add 3 parts of propyl ester into the planetary mixer together with the base material and carry out a chemical reaction with a vacuum degree of 0.08MPa and a rotation speed of 80 rpm for 4 hours to make an electronic flame-retardant silicone sealant. The product performance test results are shown in Table 1.

Embodiment 1

[0079] 1. Synthesis of nitrogen-containing trimethoxysilane coupling agent:

[0080] Add vinyltriacetoxysilane and aminomethylisobutyltrimethoxysilane into the reaction kettle at a weight ratio of 1:0.5, raise the temperature of the compound to 120°C, and reflux at this temperature for 2 hours; reflux After the end, carry out vacuum distillation at 150°C and 0.08MPa; after distillation, remove the product from the reactor and pack it for later use;

[0081] 2. Surface treatment of magnesium hydroxide or aluminum hydroxide:

[0082] In the reaction kettle, add 1% nitrogen-containing trimethoxysilane coupling agent to 99% magnesium hydroxide or aluminum hydroxide powder, then raise the temperature step by step while stirring, and pressurize to completely vaporize the coupling agent , under the conditions of 150°C and 0.5Mpa, the treatment time is 4 hours;

[0083] Three, base material

[0084] 100 parts by weight of α, ω-dihydroxypolydimethylsiloxane (viscosity of 20 Pa.s at ...

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Abstract

The invention discloses an electronic flame-proof silicone sealing glue and manufacturing method, which comprises the following parts: 100 percent alpha, omega-bihydroxy polysiloxane, 1-50 percent polydimethylsiloxane, 60-200 percent aluminum hydroxide, 60-200 percent magnesium hydroxide, 2-15 percent cross linking agent, 0.2-4 percent silane cross linking agent, 0.1-5 percent catalyst, wherein the aluminum hydroxide and magnesium hydroxide proceed surface disposal. The manufacturing method comprises the steps: first. Synthesizing trimethoxy silane coupling agent with nitrogen; second. Disposing the surface of magnesium hydroxide or aluminum hydroxide; third. Making base material; fourth. Synthesizing the sealing glue.

Description

technical field [0001] The invention relates to an electronic appliance adhesive and a manufacturing method thereof, in particular to a one-component room temperature vulcanized flame-retardant silicone sealant used in manufacturing electronic components and a manufacturing method thereof. Background technique [0002] In recent years, with the rapid development of the electronics industry, electronic equipment is developing in the direction of miniaturization, light weight, high capacity, and high performance. High integration, ultra-miniature, and ultra-thin electronic components have become a trend. It is imperative to use bonding technology instead of traditional connection technology. At the same time, partial discharge and sparking in electronic appliances often cause fire hazards in high-voltage situations; therefore, the requirements for flame retardancy, adhesion and electrical properties of adhesives for electronic appliances are also getting higher and higher. Th...

Claims

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Application Information

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IPC IPC(8): C09J183/14C09J9/00C09K3/10
Inventor 陈世龙
Owner 浙江凌志新材料有限公司
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