High-enthalpy phase-change silicone pad and preparation method thereof

A technology of silicone gaskets and phase change microcapsules, applied in the directions of adhesives, polymer adhesive additives, non-polymer adhesive additives, etc. Inflammability or lack of insulation and other problems, to achieve long service life, good flexibility and adhesion, good sealing effect

Active Publication Date: 2019-05-03
深圳航美新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They all adopt the method of dipping or coating to prepare the phase change film, which requires the viscosity of the system to be small, the amount of microcapsules added is limited to a certain extent, and the latent heat of phase change is less than 110J/g; Or copper foil as a support material to achieve a certain strength for easy application, but these phase change films are lacking in f

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The high-enthalpy phase-change silica gel gasket of this embodiment adopts paraffin phase-change microcapsules produced by Mitsubishi Chemical Industry, Japan, and its raw materials are composed of:

[0052] Vinyl-terminated silicone oil (viscosity of 60,000 cP) 15.0g

[0053] Paraffin phase-change microcapsules (melamine resin as the wall material) 70.0g

[0054] Flame Retardant - Titanium Dioxide 6.0g

[0055] Adhesive - γ-Glycidoxypropyltrimethoxysilane 2.0g

[0056] Thinner - simethicone oil (viscosity 100cP) 3.0g

[0057] Crosslinking agent-hydrogen-terminated silicone oil (viscosity 25cP) 1.5g

[0058] Karlster platinum catalyst (effective content of platinum is 300ppm) 1.5g

[0059] Inhibitor - acetylene cyclohexanol (effective content of 5% in simethicone oil solution) 1.0g

[0060] The preparation method of the above-mentioned high-enthalpy phase-change silica gel gasket in this embodiment is as follows:

[0061] 1) Add 50wt% vinyl-terminated silicone oil...

Embodiment 2

[0067] The high-enthalpy phase-change silicone gasket in this example is a transformation of Example 1. The vinyl silicone oil is vinyl-terminated silicone oil with a viscosity of 5,000 cP, and the types of paraffin phase-change microcapsules, flame retardants, and adhesives And content remains unchanged with embodiment 1, and its raw material composition is as follows:

[0068] Vinyl-terminated silicone oil (viscosity 5,000 cP) 14.5g

[0069] Paraffin phase-change microcapsules (melamine resin as the wall material) 70.0g

[0070] Flame Retardant - Titanium Dioxide 6.0g

[0071] Adhesive - γ-Glycidoxypropyltrimethoxysilane 2.0g

[0072] Diluent - simethicone oil (viscosity 100cP) 2.0g

[0073] Crosslinking agent-hydrogen-terminated silicone oil (viscosity 25cP) 3.0g

[0074] Karlster platinum catalyst (effective content of platinum is 300ppm) 1.5g

[0075] Inhibitor - acetylene cyclohexanol (effective content of 5% in simethicone oil solution) 1.0g

[0076] The preparati...

Embodiment 3

[0078] A high-enthalpy phase-change silica gel gasket in this embodiment uses domestically produced paraffin phase-change microcapsules, and its raw materials are composed of:

[0079] Vinyl-terminated silicone oil (viscosity 60,000 cP) 24.0g

[0080] Paraffin phase-change microcapsules (urea-formaldehyde resin as the wall material) 60.0g

[0081] Flame Retardant - Titanium Dioxide 6.0g

[0082] Adhesive - γ-Glycidoxypropyltrimethoxysilane 2.0g

[0083] Thinner - simethicone oil (viscosity 100cP) 3.0g

[0084] Crosslinking agent-hydrogen-terminated silicone oil (viscosity 25cP) 2.5g

[0085] Karlster platinum catalyst (effective content of platinum is 300ppm) 1.5g

[0086] Inhibitor - acetylene cyclohexanol (effective content of 5% in simethicone oil solution) 1.0g

[0087] The preparation method of the high-enthalpy phase-change silica gel gasket in this example is the same as that in Example 1.

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Abstract

The invention discloses a high-enthalpy phase-change silicone pad and a preparation method thereof. The silicone pad includes, by mass, vinyl silicone oil 10-25%, paraffin phase-change microcapsules 50-85%, a crosslinker 0.5-5%, a flame retardant 5-15%, a binder 0.5-4%, a diluent 2-6%, a platinum catalyst 0.01-0.04%, and an inhibitor 0.005-0.02%; all the components add to 100% by mass. The silicone pad has a wide phase change range of 25-70 DEG C, is high in phase-change enthalpy of 100-140 J/g, has excellent flexibility and adhesion force, and certain flame-retarding level and insulation effect. The phase-change material has great sealability, can resist cold and hot impact, and is long in service life.

Description

technical field [0001] The invention relates to the field of thermal management materials, in particular to a high-enthalpy phase-change silica gel gasket and a preparation method thereof. Background technique [0002] At present, with the development of microelectronics integration technology, 3C products such as computers, communications and consumer electronics are also showing a trend of thinning and miniaturization. The densification of semiconductor chips and electronic components puts forward higher requirements for heat dissipation efficiency. Traditional heat dissipation materials, such as heat-conducting silicone pads, heat-conducting silicone grease, etc., have high thermal conductivity, but need to conduct heat out in time with heat pipes or metal sheets, which not only has a complex structure, but also has poor peak heat dissipation and temperature uniformity effects; In addition, thermal conductive silicone grease also has the risk of increasing interface ther...

Claims

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Application Information

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IPC IPC(8): C09J183/07C09J11/06C09J11/04C09J11/08
Inventor 黄宏波路华李鹏张洪涛
Owner 深圳航美新材料科技有限公司
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