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A kind of flame-retardant thermoplastic dynamically vulcanized silicone rubber and preparation method thereof

A technology of dynamic vulcanization and silicone rubber, applied in the field of flame retardant thermoplastic dynamic vulcanization silicone rubber and its preparation, can solve the problem of no further research on flame retardant thermoplastic dynamic vulcanization silicone rubber, etc., and achieve large-scale industrial production without toxic effects. Volatile gas pollution, easy to use 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 flame-retardant thermoplastic dynamic vulcanized silicone rubber

Method used

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  • A kind of flame-retardant thermoplastic dynamically vulcanized silicone rubber and preparation method thereof
  • A kind of flame-retardant thermoplastic dynamically vulcanized silicone rubber and preparation method thereof
  • A kind of flame-retardant thermoplastic dynamically vulcanized silicone rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3 and comparative example 1

[0030] 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.

[0031] The silicone rubber composition of table 1 embodiment 1~3 and comparative example 1

[0032] name TPU Silicone rubber compound Compatibilizer crosslinking agent catalyst flame retardant Example 1 70 30 5 2.5 0.05 10 Example 2 50 50 5 2.5 0.05 10 Example 3 30 70 5 2.5 0.05 10 Comparative example 1 70 30 5 0 0 10

[0033] The preparation method of the flame-retardant thermoplastic dynamic vulcanized silicone rubber of Examples 1-3 is as follows:

[0034] Step 1) Add thermoplastic polyurethane elastomer (TPU), silicone rubber compound, compatibilizer, crosslinking agent, and flame retardant in the formula shown in Table 1 to the internal mixer, and set the temperature to 160°C. The rotational speed is 100 rpm, the banburying time is 10 min...

Embodiment 4～6 and comparative example 2

[0042] 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.

[0043] The silicone rubber composition of table 3 embodiment 4~6 and comparative example 2

[0044] name TPU Silicone rubber compound Compatibilizer crosslinking agent catalyst flame retardant Example 4 60 40 5 2 0.1 10 Example 5 60 40 10 2 0.1 10 Example 6 60 40 20 2 0.1 10 Comparative example 2 60 40 0 2 0.1 10

[0045] The preparation method of the flame-retardant thermoplastic dynamic vulcanized silicone rubber of Examples 4-6 is as follows:

[0046]Step 1) Add the thermoplastic polyurethane elastomer (TPU), silicone rubber compound, compatibilizer, crosslinking agent, and flame retardant in the formula shown in Table 3 into the internal mixer, and set the temperature to 200°C. The rotational speed is 30 rpm, the banburying time is 3 min, ...

Embodiment 7～10 and comparative example 3

[0055] 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.

[0056] The silicone rubber composition of table 5 embodiment 7~10 and comparative example 3

[0057]

[0058]

[0059] The preparation method of the flame-retardant thermoplastic dynamic vulcanized silicone rubber of Examples 7-10 is as follows:

[0060] Step 1) Add the thermoplastic polyurethane elastomer (TPU), silicone rubber compound, compatibilizer, crosslinking agent, and flame retardant in the formula shown in Table 5 into the internal mixer, and set the temperature to 190°C. The rotational speed is 80 rpm, the banburying time is 4 minutes, and the premix is ​​obtained by extrusion and granulation. 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, an...

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Abstract

The invention discloses a flame-retardant thermoplastic dynamic vulcanized silicone rubber and a preparation method thereof. This flame-retardant thermoplastic dynamic vulcanized silicone rubber is composed of the following raw materials: thermoplastic polyurethane elastomer, silicone rubber compound, flame retardant, crosslinking agent, compatibilizer, and catalyst. Also disclosed is a method for preparing flame-retardant thermoplastic dynamic vulcanized silicone rubber through dynamic vulcanization. The flame-retardant thermoplastic dynamic vulcanized silicone rubber prepared by the invention has the characteristics of good flame retardancy, comfortable handle, recyclability, excellent mechanical properties, etc., and can be widely used in the fields of electronics, automobiles, military industry, communications and the like.

Description

technical field [0001] The invention relates to a flame-retardant 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 materials. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/08C08L83/07C08L23/08C08L83/05C08K5/523C08L75/06
CPCC08L75/06C08L75/08C08L2201/02C08L2205/025C08L2205/035C08L2205/08C08L2207/04C08L83/04C08L23/0853C08K5/523C08L23/0869
Inventor 刘超栋麦裕良金震卢镇辉
Owner INST OF CHEM ENG GUANGDONG ACAD OF SCI
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