Thermally-conductive rubber material and preparation method thereof as well as thermally-conductive rubber sheet

A heat-conducting rubber and heat-conducting powder technology, applied in the field of heat-conducting rubber materials and their preparation, and heat-conducting rubber sheets, can solve the problems of heavy odor, low temperature resistance, silicone oil exudation, etc. of heat-conducting sheets, and achieve good flame retardant effect and good thermal conductivity. , the effect of keeping clean

Active Publication Date: 2018-06-15
KUSN ZHONGDI MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, the heat-conducting silicone rubber has the phenomenon of silicone oil leakage, and the acrylic resin heat-conducting sheet has problems such as heavy odor and low temperature resistance. At present, there is no odorless, oil-proof, long-term low temperature resistance (-40 ℃) on the market. 5000h or more) thermally conductive rubber material

Method used

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  • Thermally-conductive rubber material and preparation method thereof as well as thermally-conductive rubber sheet

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preparation example Construction

[0081] According to a second aspect of the present invention, the present invention provides a method for preparing the above-mentioned thermally conductive rubber material, comprising the following steps:

[0082] Firstly, the thermal conductive powder, flame retardant, polymer polyol, polyisocyanate, polyhydroxy chain extender and optional additives are mixed evenly, and then hot-pressed at high temperature to obtain the thermal conductive rubber material.

[0083] In the preparation method of the heat-conducting rubber material provided by the present invention, the heat-conducting powder and the flame retardant are mixed evenly with the raw materials for preparing the polyurethane resin, and then the polyurethane resin is molded, so that the heat-conducting powder and the flame retardant are mixed in the polyurethane resin The uniform dispersion makes the thermal conductivity and flame retardancy of the molded thermally conductive rubber material stable.

[0084] In a pref...

Embodiment 1

[0097] This embodiment provides a thermally conductive rubber material, including the following raw materials by mass percentage: 7.5% polyurethane resin, 47% thermally conductive powder, 30% flame retardant powder, 3% silane coupling agent (KH550), and 0.5% platinum black And color paste 2%, wherein the raw material of polyurethane resin comprises polyester polyol (molecular weight 4000) 35%, trihydroxypolyether (molecular weight 9000) 52% and diisocyanate 13% by mass percentage.

Embodiment 2

[0099] This embodiment provides a heat-conducting rubber material, including the following raw materials by mass percentage: 50% polyurethane resin, 48.5% heat-conducting powder, 1% flame-retardant powder, 0.02% silane coupling agent (KH550), and 0.02% platinum black And color paste 0.01%, wherein the raw material of polyurethane resin comprises polyester polyol (molecular weight 6000) 35%, trihydroxy polyether (molecular weight 7000) 52% and diisocyanate 13%.

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Abstract

The invention provides a thermally-conductive rubber material and a preparation method thereof as well as a thermally-conductive rubber sheet, relates to the technical field of thermally-conductive materials. The thermally-conductive rubber material is prepared from the following raw materials in percentage by mass: 7 to 50 percent of polyurethane resin, 40 to 92 percent of thermally-conductive powder and 1 to 30 percent of a flame retardant. The technical problem that the thermally-conductive rubber material with no odor, no oil leakage and long-term low-temperature resistance does not appearin the current market is alleviated, and the polyurethane resin, the thermally-conductive powder and the flame retardant are synergistically matched; the prepared thermally-conductive rubber materialhas the advantages of high thermal conductivity, low heat resistance and good thermal conductivity; in addition, oil leakage is avoided, so that the surface cleanness of the rubber material is kept;meanwhile, technical effects of good flame-retardant effects, no possibility of producing irritating smell and avoiding hidden danger to the health of personnel are realized.

Description

technical field [0001] The invention relates to the technical field of heat-conducting materials, in particular to a heat-conducting rubber material, a preparation method thereof, and a heat-conducting rubber sheet. Background technique [0002] Thermally conductive rubber is mostly used between electronic components, for example, it can be used as a heat dissipation structure in electronic components, including heat dissipation plates, heat pipes, etc. However, in the prior art, the heat-conducting silicone rubber has the phenomenon of silicone oil leakage, and the acrylic resin heat-conducting sheet has problems such as heavy odor and low temperature resistance. At present, there is no odorless, oil-proof, long-term low temperature resistance (-40 ℃) on the market. 5000h or more) thermally conductive rubber material. [0003] In view of this, the present invention is proposed. Contents of the invention [0004] The purpose of the present invention is to provide a heat-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08K3/22C08K3/28C08K3/38C08K5/544C08K13/02C08G18/48C08G18/42C09K5/14
CPCC08G18/4018C08G18/42C08G18/4829C08K3/22C08K3/28C08K3/38C08K5/544C08K13/02C08K2003/2227C08K2003/2296C08K2003/282C08K2003/385C08K2201/003C08L2201/02C09K5/14C08L75/08
Inventor 金天辉刘伟德
Owner KUSN ZHONGDI MATERIALS TECH
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