Addition type heat conducting silicon rubber and manufacturing method thereof

A heat-conducting silicone rubber and addition-type technology, applied in the field of polymer materials, can solve the problems of not meeting the requirements of the rapid development of the electronics industry, not being able to cure and curing speed, and not mentioning the flow properties, etc., to achieve excellent thermal conductivity and outstanding flow properties , Conducive to the effect of potting

Active Publication Date: 2009-04-15
CHENGDU GUIBAO SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new type of silicon carbide (SiC) composite materials made by adding specific amounts of metal oxides or other substance into an organopolysiloxane resin matrix were found to exhibit better thermal conductivities than traditional composites without any extra ingredients like ceramic powders. These improved qualifications include good fluid behavior during injection moldings with minimal shrinkage upon solidification, low water absorption on agitation caused by solvent evaporation, easy handling when mixed together, no damaging effect on electronic devices, etc., making them suitable for various applications such as semiconductor packaging, power transmission systems, automotives, energy storage units, sensors, medical equipment, and others that require reliable connections between different elements within these products.

Problems solved by technology

This patented technical problem addressed by this patent relates to improving the efficiency and effectiveness of electronics packaging due to their compact size and vulnerable parts such as integrated circuit (IC) chips. To address this issue, there was developed a new type called PHOSPACR™ where certain chemicals were added during manufacturing process to improve its quality control over the final product's physical characteristics. However, current methods require expensive equipment like vacuum systems, resulting in increased costs associated with maintaining stable conditions within the production line.

Method used

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  • Addition type heat conducting silicon rubber and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: Add 100 parts by mass of vinyl silicone oil with a viscosity of 400 mpa·s at a temperature of 25°C, 450 parts by mass of aluminum oxide, and 50 parts by mass of silicon nitride into a vacuum kneader, and at a temperature of 150°C, a vacuum degree of 0.06 MPa, dehydration and blending for 200 minutes to obtain the base material. Add 1 mass part of hydrogen-containing silicone oil with a hydrogen content of 0.5%, 0.01 mass part of 2-methyl-3-butynyl-2 alcohol, and 3 mass parts of octamethylcyclotetrasiloxane into a mixer and 100 mass parts base Stir and mix the materials for 30 minutes to obtain component A; add 0.25 parts by mass of alcohol solution of chloroplatinic acid and 3 parts by mass of octamethylcyclotetrasiloxane to a mixer and stir and mix with 100 parts by mass of the base material for 30 minutes to obtain component B ; After taking equal mass of component A and component B and mixing evenly, degassing at a vacuum degree of 0.06MPa for 3 minutes to...

Embodiment 2

[0043] Example 2: Add 100 parts by mass of vinyl silicone oil with a viscosity of 1000 mpa·s at a temperature of 25°C, 350 parts by mass of aluminum oxide, and 50 parts by mass of silicon carbide into a vacuum kneader. MPa, dehydration and blending for 120 minutes to obtain the base material. Add 2 parts by mass of hydrogen-containing silicone oil with a hydrogen content of 1%, 0.06 parts by mass of methyltris(methylbutynyloxy)silane, and 5 parts by mass of tetramethyltetravinylcyclotetrasiloxane into a mixer for neutralization 100 parts by mass of the base material were stirred and mixed for 30 minutes to obtain component A; 0.5 parts by mass of vinylsiloxane chelate of chloroplatinic acid and 5 parts by mass of tetramethyltetravinylcyclotetrasiloxane were added to the mixer and 100 parts by mass The mass parts of the base material were stirred and mixed for 30 minutes to obtain the B component; after taking the equal mass of the A component and the B component and mixing the...

Embodiment 3

[0044] Example 3: Add 100 parts by mass of vinyl silicone oil with a viscosity of 3000mpa·s at 25°C, 180 parts by mass of aluminum oxide, and 20 parts by mass of silicon carbide into a vacuum kneader. Mix for 30 minutes to obtain a base. Add 2 parts by mass of hydrogen-containing silicone oil with a hydrogen content of 0.75%, 0.03 parts by mass of methyltris(methylbutynyloxy)silane, and 10 parts by mass of hexamethyldisiloxane into a mixer to neutralize 100 parts by mass of base The material was stirred and mixed for 15 minutes to obtain component A; 0.75 parts by mass of vinylsiloxane chelate of chloroplatinic acid and 10 parts by mass of hexamethyldisiloxane were added to a mixer and stirred and mixed with 100 parts of base material for 40 Component B can be obtained in minutes; after mixing components A and B of equal mass, degassing at a vacuum degree of 0.09MPa for 10 minutes to obtain addition-type thermally conductive silicone rubber, the product performance test result...

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Abstract

The invention relates to an addition type heat-conducting silicone rubber and a preparation method thereof. The addition type heat-conducting silicone rubber is characterized in that 100 weight portions of vinyl silicone oil and 200 weight portions to 500 weight portions of heat-conducting material are dewatered and mixed in a vacuum kneader for 30 to 200 minutes with the temperature of 100 to 150 DEG C and the vacuum degree of 0.06 to 0.099 MPa so as to obtain base material; under normal temperature, 0.5 weight portion to 1.5 weight portions of hydrogeneous silicone oil, 0.01 weight portion to 0.06 weight portion of inhibitor and 3 weight portions to 10 weight portions of diluent are added and stirred in a stirrer for 15 to 40 minutes so as to obtain A glue; 100 weight portions of base material are taken, 0.25 weight to 0.75 weight portion of platinum catalyst and 3 weight portions to 10 weight portions are added and stirred in the stirrer for 15 to 40 minutes so as to obtain B glue. The A glue and the B glue with the same weight portions are taken, mixed evenly and defoamed for 3 to 10 minutes at the vacuum degree of 0.06 to 0.09 MPa so as to obtain addition type heat-conducting silicone rubber. The heat-conducting silicone rubber is cured at normal temperature or low temperature, has good flow property and convenient use, has higher heat conductivity after fluidization and can be used for the components with the need of heat dissipation and heat transmission in the electronic appliance field.

Description

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Claims

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Application Information

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Owner CHENGDU GUIBAO SCI & TECH
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