阅读说明：本技术 一种新型导热热塑性弹性体材料 (Novel heat-conducting thermoplastic elastomer material ) 是由 许一斌 于 2019-03-12 设计创作，主要内容包括：本发明涉及一种新型导热热塑性弹性体材料,其成分含量百分比如下：SEBS 1-40%、基础油1-40%、热塑性树脂 1-40%、碳纳米管0-30%、导热填料0-30%、辅助剂0-3%,其制备方法如下：(1)将碳纳米管倒入基础油中,用超声波震荡分散40分钟；(2)将分散有碳纳米管的基础油倒入SEBS中,高速搅拌3分钟形成混合物；(3)依次将热塑性树脂、导热填料、辅助剂倒入(2)中的混合物,搅拌均匀然后用双螺杆挤出机挤出形成新型导热热塑性弹性体材料。本发明采用了SEBS、碳纳米管以及其他导热填料,同时加入了基础油和热塑性树脂,进而生产出较高导热系数的TPE弹性体材料,制备的弹性体材料具有拉伸强度和撕裂强度高以及导热性能好的优点。(The invention relates to a novel heat-conducting thermoplastic elastomer material which comprises the following components in percentage by weight: 1-40% of SEBS, 1-40% of base oil, 1-40% of thermoplastic resin, 0-30% of carbon nano tube, 0-30% of heat-conducting filler and 0-3% of auxiliary agent, and the preparation method comprises the following steps: (1) pouring the carbon nano tube into base oil, and dispersing for 40 minutes by ultrasonic oscillation; (2) pouring the base oil dispersed with the carbon nanotubes into SEBS, and stirring at a high speed for 3 minutes to form a mixture; (3) and (3) pouring the thermoplastic resin, the heat-conducting filler and the auxiliary agent into the mixture obtained in the step (2) in sequence, uniformly stirring, and extruding by using a double-screw extruder to form the novel heat-conducting thermoplastic elastomer material. According to the invention, the SEBS, the carbon nano tube and other heat-conducting fillers are adopted, and the base oil and the thermoplastic resin are added simultaneously, so that the TPE elastomer material with higher heat conductivity coefficient is produced, and the prepared elastomer material has the advantages of high tensile strength and tearing strength and good heat-conducting property.)

1. A novel heat-conducting thermoplastic elastomer material is characterized by comprising the following components in percentage by weight: 1-40% of SEBS, 1-40% of base oil, 1-40% of thermoplastic resin, 0-30% of carbon nano tube, 0-30% of heat-conducting filler and 0-3% of auxiliary agent.

2. The novel thermally conductive thermoplastic elastomer material of claim 1, wherein: the styrene content in the styrene block copolymer is 10-40%.

3. The novel thermally conductive thermoplastic elastomer material of claim 1, wherein: the base oil includes, and is not limited to, alkanes/PAOs.

4. The novel thermally conductive thermoplastic elastomer material of claim 1, wherein: the thermoplastic resin includes, but is not limited to, PP/HDPE.

5. The novel thermally conductive thermoplastic elastomer material of claim 1, wherein: the carbon nanotubes are multi-walled/single-walled.

6. The novel thermally conductive thermoplastic elastomer material of claim 1, wherein: the thermally conductive filler includes, but is not limited to, boron nitride/silicon nitride/aluminum nitride/silicon carbide/zinc oxide/aluminum oxide.

7. The novel thermally conductive thermoplastic elastomer material of claim 1, wherein: such adjuvants include, but are not limited to, the following: stabilizers and lubricants.

8. The method for preparing a novel heat-conducting thermoplastic elastomer material as claimed in claim 1, wherein the method comprises the following steps: comprises the following steps;

(1) pouring the carbon nano tube into base oil, and dispersing for 40 minutes by ultrasonic oscillation;

(2) pouring the base oil dispersed with the carbon nanotubes into SEBS, and stirring at a high speed for 3 minutes to form a mixture;

(3) and (3) pouring the thermoplastic resin, the heat-conducting filler and the auxiliary agent into the mixture obtained in the step (2) in sequence, uniformly stirring, and extruding by using a double-screw extruder to form the novel heat-conducting thermoplastic elastomer material.

9. The method for preparing the novel heat-conducting thermoplastic elastomer material as claimed in claim 8, wherein the method comprises the following steps: in (1), the carbon nanotubes are previously surface-treated with a surface treatment agent to enhance dispersion.

Technical Field

The invention belongs to the technical field of elastomer materials, and particularly relates to a novel heat-conducting thermoplastic elastomer material.

Background

In some electronic applications, some heat-dissipating elastic materials are often needed, the heat conductivity coefficient of the traditional polymer is 0.1-0.3w/m.k, the existing solution mainly uses materials such as heat-conducting silica gel, wherein the filling ratio of the heat-conducting filler is usually as high as more than 80%, so that the tearing strength of the material is low, the tensile strength is low, the density is high, the hardness is high, the surface is rough, even if the heat conductivity coefficient is high, the actual heat-conducting effect is affected due to contact gaps caused by the rough surface, the heat-conducting silica gel needs a thermosetting vulcanization process, rubber mixing and vulcanization are needed during production, leftover materials cannot be recycled, the environmental protection is not facilitated, and the existing elastic materials cannot meet the actual use requirements.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a novel heat-conducting thermoplastic elastomer material which is high in tensile strength, high in tearing strength, low in density and smooth in surface.

In order to achieve the purpose, the invention adopts the technical scheme that: a novel heat-conducting thermoplastic elastomer material comprises the following components in percentage by weight: 1-40% of SEBS, 1-40% of base oil, 1-40% of thermoplastic resin, 0-30% of carbon nano tube, 0-30% of heat-conducting filler and 0-3% of auxiliary agent.

Preferably, the content of styrene in the SEBS is 10% -40%.

Preferably, the base oil includes, and is not limited to, alkanes/PAOs.

Preferably, the thermoplastic resin includes, but is not limited to, PP/HDPE.

Preferably, the carbon nanotubes are multi/single walled.

Preferably, the thermally conductive filler includes, but is not limited to, boron nitride/silicon nitride/aluminum nitride/silicon carbide/zinc oxide/aluminum oxide.

Preferably, the adjuvants include, but are not limited to, the following: stabilizers and lubricants.

A preparation method of a novel heat-conducting thermoplastic elastomer material comprises the following steps;

(1) pouring the carbon nano tube into base oil, and dispersing for 40 minutes by ultrasonic oscillation;

(2) pouring the base oil dispersed with the carbon nanotubes into SEBS, and stirring at a high speed for 3 minutes to form a mixture;

(3) and (3) pouring the thermoplastic resin, the heat-conducting filler and the auxiliary agent into the mixture obtained in the step (2) in sequence, uniformly stirring, and extruding by using a double-screw extruder to form the novel heat-conducting thermoplastic elastomer material.

Preferably, the carbon nanotubes are previously surface-treated with a surface treatment agent in (1) to enhance dispersion.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

according to the novel heat-conducting thermoplastic elastomer material, the SEBS material is adopted to replace silicon rubber, the carbon nano tubes and other heat-conducting fillers are used to compositely replace the traditional heat-conducting fillers, a special process is adopted to help the dispersion of the carbon nano tubes, and meanwhile, the base oil and the thermoplastic resin are added, so that the SEBS elastic material with a high heat-conducting coefficient is produced, the hardness of the SEBS material can be as low as 15A, the tensile strength is high, the tearing strength is high, the density is low, the surface is smooth, the SEBS elastic material can be produced by an injection molding process, leftover materials can be recycled, market requirements are well met, and the novel heat-conducting thermoplastic elastomer material has high practicability and popularization value.

Detailed Description

The present invention will be described in further detail with reference to specific examples.

The invention relates to a novel heat-conducting thermoplastic elastomer material which comprises the following components in percentage by weight: 1-40% of SEBS, 1-40% of base oil, 1-40% of thermoplastic resin, 0-30% of carbon nano tube, 0-30% of heat-conducting filler and 0-3% of auxiliary agent.

As a further preferred example, the styrene content of SEBS is 10% to 40%.

As a further preferred example, the base oil is a mineral base oil in which linear paraffins and naphthenes are mixed (the sum of both > 99%) or a synthetic base oil resynthesized from natural gas cracking. Base oils may be used to increase flow, as well as to increase softness.

As a further preferred embodiment, the thermoplastic resin includes, and is not limited to, PP/HDPE.

As a further preferred embodiment, the carbon nanotubes are multi-walled and/or single-walled.

As a further preferred embodiment, the heat conductive filler is used to compound with the carbon nanotube to reduce the cost, shorten the molding cycle, and reduce the cost, and can be various inorganic or organic fillers with high thermal conductivity including boron nitride, silicon nitride, aluminum nitride, silicon carbide, zinc oxide, aluminum oxide, and the like.

As a further preferred embodiment, the adjuvant consists of the following reagents: stabilizer and lubricant, wherein the stabilizer is Irganox 1010 and Irgafos 168.