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Additive for improving heat conduction of additional-type silicon rubber and preparation method thereof

A technology of silicone rubber and additives, which is applied in the field of additives for improving the thermal conductivity of addition-type silicone rubber and its preparation, which can solve the problems of reduced mechanical strength of addition-type silicone rubber and achieve the effect of improving thermal conductivity

Active Publication Date: 2015-09-09
SHENZHEN FLOURISH ORGANOSILICONE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This application provides an additive for improving the thermal conductivity of addition-type silicone rubber and its preparation method, which solves the problem in the prior art that the addition of heat-conducting powder will lead to a decrease in the mechanical strength of addition-type silicone rubber

Method used

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  • Additive for improving heat conduction of additional-type silicon rubber and preparation method thereof

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Embodiment 1

[0016] Embodiment one: A method for preparing an additive for improving the thermal conductivity of addition-type silicone rubber, comprising the following steps:

[0017] Add 297 grams (1.5 mol) of triisobutyl aluminate into a 500ml three-necked flask, and after heating up to 60°C, add 27 grams (1.5 mol) of water dropwise under stirring conditions, and drop it within 40 minutes . And react at 60°C for 6 hours; add 57 grams (0.3 mol) of vinyl silane coupling agent to the above reactant, react for 10 minutes after the above materials are added, and then add 4 grams (0.06 mol) Acetic acid, then raise the temperature to 140°C under stirring, react under this condition for 6 hours, cool down to 90°C, and finally remove small molecular impurities under reduced pressure to obtain the additive.

Embodiment 2

[0018] Embodiment two: A method for preparing an additive for improving the thermal conductivity of addition-type silicone rubber, comprising the following steps:

[0019] Add 297 grams (1.5 mol) of triisobutyl aluminate into a 500ml three-necked flask, and after heating up to 70°C, add 81 grams (4.5 mol) of water dropwise under stirring conditions, and drop it within 40 minutes . And react at 70°C for 4 hours; add 285 grams (1.5 mol) of vinyl silane coupling agent to the above reactant, react for 15 minutes after the above materials are added, and then add 13.5 grams (0.225 mol) Acetic acid, then raise the temperature to 150°C under stirring, react under this condition for 4 hours, cool down to 100°C, remove small molecular impurities under reduced pressure, and the additive can be obtained.

Embodiment 3

[0020] Embodiment three: A method for preparing an additive for improving the thermal conductivity of addition-type silicone rubber, comprising the following steps:

[0021] Add 297 grams (1.5 mol) of triisobutyl aluminate to a 500ml three-necked flask, and after heating up to 65°C, add 36 grams (2 mol) of water dropwise under stirring conditions, and drop it within 40 minutes . And react at 65°C for 5 hours; add 95 grams (0.5 mol) of vinyl silane coupling agent to the above reactant, react for 12 minutes after adding the above materials, and then add 5 grams (0.08 mol) Acetic acid, then raise the temperature to 140°C under stirring, react under this condition for 5 hours, cool down to 95°C, remove small molecular impurities under reduced pressure, and the additive can be obtained.

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Abstract

The invention discloses a preparation method of an additive for improving heat conduction of additional-type silicon rubber, comprising the following steps: adding a certain amount of aluminic acid ester in a reaction bottle, raising the temperature to 60-70 DEG C while stirring, dropwise adding water 1-3 times of mole amount of aluminic acid ester, reacting for 4-6h under the temperature of 60-70 DEG C, adding a vinyl silicane coupling agent 0.2-1.0 time of mole amount of aluminic acid ester in a reactant, adding organic acid under stirring, raising the temperature to 140-150 DEG C for reacting for 4-6h, cooling to 90-100 DEG C, and removing micromolecule impurities to obtain the additive. After the additive is added to the addition-type rubber, the heat conduction of the rubber is greatly improved and mechanical strength and other properties of the rubber are not influenced.

Description

technical field [0001] The present application relates to an additive type silicone rubber additive, in particular to an additive for improving the thermal conductivity of addition type silicone rubber and a preparation method thereof. Background technique [0002] With the rapid development of my country's electronics industry, the problem of heat dissipation (heat conduction) of electronic products has become increasingly prominent, and the requirements for heat-conducting materials have also increased. Since electronic products have insulation (non-conductive) requirements for polymer thermal conductivity materials, in order to improve the thermal conductivity of polymer thermal conductivity materials, metal powder with high thermal conductivity cannot be added, and only inorganic materials with low thermal conductivity and non-conductivity can be added. powder and metal oxide powder (for example: silicon carbide, silicon oxide, aluminum oxide, etc.). The addition of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K5/5425
Inventor 文正华
Owner SHENZHEN FLOURISH ORGANOSILICONE MATERIAL CO LTD