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A thermally conductive thermoplastic dynamic vulcanized silicone rubber and its preparation method

A technology of dynamic vulcanization and silicone rubber, which is applied in the field of thermally conductive thermoplastic dynamic vulcanized silicone rubber and its preparation, can solve the problems of no further research on thermally conductive thermoplastic dynamic vulcanized silicone rubber, and achieve large-scale industrial production, excellent mechanical properties, low cost effect

Active Publication Date: 2021-12-07
INST OF CHEM ENG GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, US4500688 and CN106751736A have prepared TPU / silicone rubber thermoplastic elastomers through different dynamic vulcanization systems, but have not further studied thermally conductive thermoplastic dynamic vulcanized silicone rubber

Method used

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  • A thermally conductive thermoplastic dynamic vulcanized silicone rubber and its preparation method
  • A thermally conductive thermoplastic dynamic vulcanized silicone rubber and its preparation method
  • A thermally conductive thermoplastic dynamic vulcanized silicone rubber and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3 and comparative example 1

[0032] The silicone rubber compositions of Examples 1-3 and Comparative Example 1 are shown in Table 1, and the compositions stated in Table 1 are all parts by mass.

[0033] The silicone rubber composition of table 1 embodiment 1~3 and comparative example 1

[0034]

[0035]

[0036] The preparation method of the thermally conductive thermoplastic dynamic vulcanized silicone rubber of Examples 1-3 is as follows:

[0037] Step 1) Add thermoplastic polyurethane elastomer (TPU), silicone rubber compound, compatibilizer, crosslinking agent, and thermally conductive filler in the formula shown in Table 1 to the internal mixer, set the temperature to 160°C, and 100rpm, banburying time 10min, extrusion granulation to obtain the premix. The thermoplastic polyurethane elastomer used in Examples 1 to 3 is WHT-8285 (polyether) of Wanhua Chemical Company, the silicone rubber compound is EN-5150A of Dongjue Silicone Company, and the compatibilizer is EVA, cross-linked The agent is...

Embodiment 4～6 and comparative example 2

[0046] The silicone rubber compositions of Examples 4-6 and Comparative Example 2 are shown in Table 3, and the compositions stated in Table 3 are all parts by mass.

[0047] The silicone rubber composition of table 3 embodiment 4~6 and comparative example 2

[0048]

[0049]

[0050] The preparation method of the thermally conductive thermoplastic dynamic vulcanized silicone rubber of Examples 4-6 is as follows:

[0051] Step 1) Add thermoplastic polyurethane elastomer (TPU), silicone rubber compound, compatibilizer, crosslinking agent, and thermally conductive filler in the formula shown in Table 3 to the internal mixer, set the temperature to 200°C, and 30rpm, banburying time 3min, extrusion granulation to obtain the premix. The thermoplastic polyurethane elastomer that uses among the embodiment 4~6 is the S-185ALL (polyester) of Taiwan Kunzhong Company, and the silicone rubber compound is EN-8151 of Dongjue Silicone Company, and the compatibilizer is ethylene acrylic ...

Embodiment 7～10 and comparative example 3

[0060] The silicone rubber compositions of Examples 7-10 and Comparative Example 3 are shown in Table 5, and the compositions stated in Table 5 are all parts by mass.

[0061] The silicone rubber composition of table 5 embodiment 7~10 and comparative example 3

[0062]

[0063]

[0064] The preparation method of the thermally conductive thermoplastic dynamic vulcanized silicone rubber of Examples 7-10 is as follows:

[0065] Step 1) Add thermoplastic polyurethane elastomer (TPU), silicone rubber compound, compatibilizer, crosslinking agent, and thermally conductive filler in the formula shown in Table 5 to the internal mixer, set the temperature to 190°C, and 80rpm, banburying time 4min, extrusion granulation to obtain the premix. The thermoplastic polyurethane elastomer used in Examples 7-10 is WHT-8285 of Wanhua Chemical Company, the silicone rubber compound is EN-5150A of Dongjue Silicone Company, the compatibilizer is EMA, and the crosslinking agent is Dow Corning C...

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Abstract

The invention discloses a thermally conductive thermoplastic dynamic vulcanized silicone rubber and a preparation method thereof. This thermally conductive thermoplastic dynamic vulcanized silicone rubber is composed of the following raw materials: thermoplastic polyurethane elastomer, silicone rubber compound, inorganic thermally conductive filler, crosslinking agent, compatibilizer, and catalyst. Also disclosed is a method for preparing thermally conductive thermoplastic dynamic vulcanized silicone rubber through dynamic vulcanization. The thermally conductive thermoplastic dynamic vulcanized silicone rubber prepared by the invention has the characteristics of good thermal conductivity, comfortable hand feeling, recyclability, excellent mechanical properties, etc., and can be widely used in heat dissipation fields such as electronics, automobiles, and military industries.

Description

technical field [0001] The invention relates to a thermally conductive thermoplastic dynamic vulcanized silicone rubber and a preparation method thereof. Background technique [0002] Dynamic vulcanization is an emerging rubber vulcanization technology. It is a process of melting and blending unvulcanized rubber with thermoplastic materials under high shear, and adding a vulcanizing agent to vulcanize it. In this process, the thermosetting rubber phase (dispersed phase) is uniformly dispersed in the thermoplastic material (continuous phase) in a certain particle size range, and at the same time the rubber phase particles are cross-linked, and finally thermoplastic dynamic vulcanizate (TPV) is obtained. The most important feature of dynamic vulcanization is to carry the thermosetting rubber phase in thermoplastic materials, so as to combine the properties of thermosetting rubber and thermoplastic plastics, and at the same time facilitate the processing and recycling of materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/06C08L75/08C08L83/07C08L23/08C08K3/08C08K3/28C08K3/22C08K3/34C08K3/38
CPCC08K2003/0812C08K2003/222C08K2003/2227C08K2003/2296C08K2003/282C08K2003/385C08L75/06C08L75/08C08L83/04C08L23/0853C08K3/08C08K3/28C08K3/22C08K3/34C08K3/38
Inventor 师文博麦裕良栾安博卢镇辉
Owner INST OF CHEM ENG GUANGDONG ACAD OF SCI
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