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Phase change temperature control type silicone rubber composition and preparation method thereof

A silicone rubber composition and a phase-change temperature control technology, applied in the field of silicone rubber, can solve the problems of rising external temperature of electronic products, inability to meet the heat dissipation requirements of high-power electronic components, affecting the reliability of electronic products, and the number of times of use.

Active Publication Date: 2021-03-30
广州玖盈化工材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, limited by the space size of electronic components and the thermal conductivity of potting materials, it still cannot meet the heat dissipation requirements of existing, integrated, and high-power electronic components, which leads to an increase in the surface temperature of electronic products and seriously affects the operation of electronic products. reliability, number of uses

Method used

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  • Phase change temperature control type silicone rubber composition and preparation method thereof
  • Phase change temperature control type silicone rubber composition and preparation method thereof
  • Phase change temperature control type silicone rubber composition and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0044] Preparation method of silicone rubber:

[0045] Step 1) Prepare materials: prepare materials according to the raw material ratio in Table 1, wherein the flame-retardant phase change material is obtained by modifying the porous medium adsorption phase change material and the flame retardant filler through surface modifier, wherein the porous medium adsorption phase change The weight ratio of material and flame retardant filler is 3:2, the specific steps are as follows:

[0046] a. First, put the expandable graphite powder with a specification of 80 mesh and an expansion rate of about 280mL / g in a vacuum oven at 80°C for 12 hours; then put the dried expandable graphite powder in a stainless steel container, and place the stainless steel container in Heat and expand in a high-temperature furnace at 900°C for 45 seconds, take it out and grind it through a high-speed grinder to obtain expanded graphite; mix paraffin wax with a melting point of 35-40°C and the above-mentioned e...

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Abstract

The invention relates to a phase change temperature control type silicone rubber composition and a preparation method thereof. The silicone rubber composition is prepared by the following method: step1, preparing materials in proportion; step 2, preparing a base material: adding vinyl silicone oil into a kneading machine, adding a flame-retardant phase change material while stirring, conducting vacuumizing for 1-3 hours at normal temperature after uniform mixing, taking out the base material, and conducting sealing for later use; and step 3, preparing a rubber material: taking the base material, adding vinyl silicone oil and hydrogen-containing silicone oil into the base material, conducting uniform dispersing, adding a catalyst and a tackifier, and conducting uniform mixing, defoaming, and packaging to obtain the phase change temperature control type silicone rubber. The phase-change temperature-control type silicone rubber prepared by the invention has a relatively high latent heatvalue, can well control the temperature within the range of 35-40 DEG C, has good human body hand feeling experience, and particularly has good temperature control performance within the range of 35-40 DEG C. Other physical and chemical properties are good, and the method is suitable for the packaging process of electronic equipment.

Description

technical field [0001] The invention belongs to the field of silicone rubber, and in particular relates to a phase-change temperature-controlling silicone rubber composition and a preparation method thereof. Background technique [0002] In the electronics industry, in order to improve the stability and reliability of components and complete machines, it is often necessary to potting electronic components or assembly parts. Except for lead wires or connectors, the entire part is wrapped and sealed by potting glue, which is in contact with the outside world. The atmosphere is isolated to ensure that the whole machine can still work normally in environments such as vibration, high humidity, drastic temperature changes, and air pollution. Silicone rubber materials are widely used in the field of potting and sealing of electronic components due to their excellent high temperature resistance, low temperature resistance, weather resistance, electrical insulation and non-corrosiven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08K13/06C08K9/12C08K9/06C08K7/24C09K5/06
CPCC08L83/04C09K5/063C08L2203/206C08K2201/003C08K2003/2227C08K2201/014C08L2205/025C08L2201/02C08K13/06C08K9/12C08K9/06C08K7/24C08K3/22
Inventor 杨化彪安多刘俊杰顾翠瑜钟炽强
Owner 广州玖盈化工材料有限公司
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