Lightweighting heat-conductive sheet material, and preparation method and applications thereof

A thermally conductive sheet and lightweight technology, which is applied to the lightweight thermally conductive sheet and its preparation and application fields, can solve the problems of fogging on the mirror surface of LEDs and automobile lampshades, failure of screen printing ink adhesion, failure of electrical connection points, etc. Oil phenomenon and fogging phenomenon, high thermal conductivity and mechanical properties, effect of ensuring safety

Inactive Publication Date: 2018-06-08
旭川新材料(广东)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, when the silicone products on the market are cured, the low molecular weight (D3-D20) will be slowly released in the form of gas after curing. In a closed system, it will eventually stay in components, sockets, sw

Method used

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  • Lightweighting heat-conductive sheet material, and preparation method and applications thereof
  • Lightweighting heat-conductive sheet material, and preparation method and applications thereof
  • Lightweighting heat-conductive sheet material, and preparation method and applications thereof

Examples

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preparation example Construction

[0034] The preparation method of this lightweight heat-conducting sheet comprises the following steps:

[0035] 1) take raw material by weighing above-mentioned composition;

[0036] 2) Heat and knead organopolysiloxane, hydrogen-containing polysiloxane, thermally conductive filler and toughening fiber under vacuum, add catalyst after cooling, and continue vacuum mixing to obtain a semi-finished product;

[0037] 3) Press the semi-finished product into tablets, and then vulcanize and form it to obtain a lightweight heat-conducting sheet.

[0038] Preferably, in step 2) of the preparation method, the thermally conductive filler is dried before use; further, when the thermally conductive filler is a nano-filler, the surface is treated with a silane coupling agent after drying.

[0039] Preferably, in step 2) of the preparation method, the degree of vacuum is ≤0.01 MPa; the heating temperature is 40°C-180°C.

[0040] Preferably, in the step 2) of the preparation method, the mix...

Embodiment 1

[0049] The lightweight thermally conductive sheet of Example 1 consists of the following raw materials in parts by mass:

[0050]

[0051] The organopolysiloxane used is a vinyl-containing organopolysiloxane, which can be divinyl polydimethylsiloxane; the hydrogen-containing silicone oil is methyl hydrogen-containing silicone oil; the platinum catalyst is a platinum catalyst; the toughening The fibers are chopped glass fibers with a diameter of 9 μm to 13 μm and a length of less than 20 mm.

[0052] Before use, pretreat the nano-zinc oxide, dilute it with KH550 silane coupling agent according to 1:20 alcohol, spray it on the surface of nano-zinc oxide, and dry it in an oven at 80°C for 2 hours. Flake boron nitride and hollow glass microspheres were dried in an oven at 100°C for 2 hours.

[0053] Put organopolysiloxane, hydrogen-containing silicone oil, nano-zinc oxide, flake boron nitride, and hollow glass microspheres into a vacuum kneader, mix at 150°C for 1 hour, and ma...

Embodiment 2

[0056] The lightweight thermally conductive sheet of Example 2 consists of the following raw materials in parts by mass:

[0057]

[0058] The organopolysiloxane used is a vinyl-containing organopolysiloxane, which can be divinyl polydimethylsiloxane; the hydrogen-containing silicone oil is methyl hydrogen-containing silicone oil; the platinum catalyst is a platinum catalyst; the toughening The fibers are chopped carbon fibers with a diameter of 5 μm to 8 μm.

[0059] Before use, pretreat the nano aluminum hydroxide, dilute it with KH550 silane coupling agent according to 1:20 alcohol, spray it on the surface of nano zinc oxide, and dry it in an oven at 80°C for 2 hours. Graphite oxide and hollow glass microspheres were dried in an oven at 100°C for 2 hours.

[0060] Put organopolysiloxane, hydrogen-containing silicone oil, nano-zinc hydroxide, graphite oxide, and hollow glass microspheres into a vacuum kneader, mix at 160°C for 1 hour, and maintain a vacuum degree of ≤0.0...

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Abstract

The invention discloses a lightweighting heat-conductive sheet material, and a preparation method and applications thereof. The lightweighting heat-conductive sheet material is composed of following raw materials: organic polysiloxane, hydrogen-containing polysiloxane, a heat-conductive filling material, a catalyst, and toughening fiber. The invention also discloses the preparation method of the lightweighting heat-conductive sheet material, and applications of the lightweighting heat-conductive sheet material in preparation of electrical vehicle batteries. Compared with commercially availableheat conductive material, the density of the lightweighting heat-conductive sheet material is reduced by more than 30%; excellent heat conductive performance and mechanical properties are achieved; the fiber filling material is added, so that the wear resistance is improved, and damage is not easily caused by punching and irregular design. Optimization and control on the raw materials and the auxiliary agents are capable of avoiding release of low molecular gas in using process, oil leakage and fogging are avoided effectively, the safety of products in using process is ensured, and potentialharm is avoided.

Description

technical field [0001] The invention relates to a lightweight heat-conducting sheet, a preparation method and application thereof. Background technique [0002] With the rapid development of the electronics industry in recent years, it has gradually developed in the direction of intensification, densification, and miniaturization, which has led to a rapid increase in the temperature around electronic components. Studies have shown that the service life of electronic components is directly related to temperature rise, so in Filling the gaps around the components and adding thermally conductive materials is an effective solution. Thermally conductive materials can not only provide safe and reliable heat dissipation for electronic components, but also play the role of insulation and shock absorption. [0003] With the depletion of oil resources and the increasing harm of air pollution and global temperature rise, countries are accelerating the research and development and prom...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/05C08K13/06C08K9/06C08K7/14C08K3/22C08K3/38C08K7/28C08K3/04C08K7/06C08K3/36
CPCC08K2003/2227C08K2003/2296C08K2003/385C08K2201/003C08K2201/004C08K2201/011C08L83/04C08L2203/20C08L2205/025C08K13/06C08K9/06C08K7/14C08K3/22C08K3/38C08K7/28C08K7/06C08K3/04C08K3/36
Inventor 杨欣华汪军
Owner 旭川新材料(广东)股份有限公司
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