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Silicon rubber composite material for casting mold and preparation method thereof

A composite material and silicone rubber technology, applied in the field of silicone rubber, can solve problems such as the need to improve thermal conductivity

Inactive Publication Date: 2017-10-24
DONGGUAN JIAQIAN NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mold material can still maintain good mechanical properties at a high temperature of 600 ° C, but the thermal conductivity of the material still needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method for a silicone rubber composite material for a casting mold, comprising the following steps:

[0024] (1) Nano-Fe 3 o 4 Add nano-fluorinated graphene to the aqueous solution dissolved in polyethylene glycol-400, ultrasonically disperse for 3 hours, then heat to 45°C, add hexamethyldisilazane dropwise to the mixture, and use a high-shear mixer to continuously disperse 1h, then stand still for 3h, after centrifugation, rinse and dry to obtain surface-treated nanoparticles;

[0025] (2) Put the hydrotalcite and surface treatment nanoparticles into a high-speed mixer, raise the temperature to 90°C, and rotate at a speed of 260 rpm, then add the silane coupling agent solution dropwise, and continue to rotate and mix for 35 minutes , take it out after reaching room temperature, and dry it at 70°C to obtain modified mixed particles;

[0026] (3) Add raw silicone rubber and vinyl silicone oil to the double-roller rubber mixer and knead for 20 minutes, th...

Embodiment 2

[0032] A preparation method for a silicone rubber composite material for a casting mold, comprising the following steps:

[0033] (1) Nano-Fe 3 o 4 Add nano-fluorinated graphene to the aqueous solution dissolved in polyethylene glycol-400, ultrasonically disperse for 3 hours, then heat to 45°C, add hexamethyldisilazane dropwise to the mixture, and use a high-shear mixer to continuously disperse 1h, then stand still for 3h, after centrifugation, rinse and dry to obtain surface-treated nanoparticles;

[0034] (2) Put the hydrotalcite and surface treatment nanoparticles into a high-speed mixer, raise the temperature to 90°C, and rotate at a speed of 260 rpm, then add the silane coupling agent solution dropwise, and continue to rotate and mix for 35 minutes , take it out after reaching room temperature, and dry it at 70°C to obtain modified mixed particles;

[0035] (3) Add raw silicone rubber and vinyl silicone oil to the double-roller rubber mixer and knead for 20 minutes, th...

Embodiment 3

[0041] A preparation method for a silicone rubber composite material for a casting mold, comprising the following steps:

[0042] (1) Nano-Fe 3 o 4 Add nano-fluorinated graphene to the aqueous solution dissolved in polyethylene glycol-400, ultrasonically disperse for 3 hours, then heat to 45°C, add hexamethyldisilazane dropwise to the mixture, and use a high-shear mixer to continuously disperse 1h, then stand still for 3h, after centrifugation, rinse and dry to obtain surface-treated nanoparticles;

[0043] (2) Put the hydrotalcite and surface treatment nanoparticles into a high-speed mixer, raise the temperature to 90°C, and rotate at a speed of 260 rpm, then add the silane coupling agent solution dropwise, and continue to rotate and mix for 35 minutes , take it out after reaching room temperature, and dry it at 70°C to obtain modified mixed particles;

[0044] (3) Add raw silicone rubber and vinyl silicone oil to the double-roller rubber mixer and knead for 20 minutes, then...

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Abstract

The invention discloses a silicon rubber composite material for a casting mold and a preparation method thereof. The composite material is prepared from the following raw materials in parts by weight: 100 parts of silicon rubber raw rubber, 20-30 parts of vinyl silicone oil, 22-28 parts of nano-Fe3O4, 15-23 parts of nano-fluorinated graphene, 15-20 parts of hydrotalcite, 3-5 parts of hexamethyl-disilazane, 2-3 parts of polyethylene glycol-400, 2-3 parts of a silane coupling agent, 7-9 parts of filler, 2-3 parts of a crosslinking agent, 1-2 parts of a catalyst and 3-5 parts of a vulcanizing agent. The silicon rubber composite material has excellent heat conducting performance, and can keep excellent stability at a relatively high temperature.

Description

technical field [0001] The invention relates to the field of silicone rubber, in particular to a silicone rubber composite material for casting molds and a preparation method thereof. Background technique [0002] Silicone rubber is generally composed of Si atoms and O atoms alternately forming the basic main chain skeleton, and the side chains are some linear organic groups with different functions. It is a kind of high and low temperature resistance, aging resistance, weather resistance and ozone resistance. It is a kind of rubber with many excellent characteristics such as electrical insulation and physiological inertia. The performance of ordinary rubber will decline rapidly or even lose its usability when the temperature rises, but silicone rubber can be used for a long time at high temperature and remain stable, mainly because the main chain of silicone rubber has a helical structure, which has great impact resistance and intermolecular The force is less, so the elast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L83/07C08K13/06C08K9/04C08K9/06C08K3/26C08K3/22C08K3/04
CPCC08K2003/2275C08K2201/003C08K2201/011C08K2201/014C08L83/04C08L2201/08C08L2205/025C08K13/06C08K9/04C08K9/06C08K9/08C08K3/26C08K3/22C08K3/04
Inventor 王海燕
Owner DONGGUAN JIAQIAN NEW MATERIAL TECH CO LTD