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Compatibilization method of silicon-based thermoplastic elastomer and obtained silicon-based thermoplastic elastomer

A thermoplastic elastomer and thermoplastic resin technology, which is applied in the field of dynamic vulcanization thermoplastic elastomer preparation, can solve the problems of poor compatibility of thermoplastic resins, etc.

Active Publication Date: 2021-05-18
CHENGDU SILIKE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For example, the patent with the publication number CN111154265A uses hydroxyl-terminated silicone oil, epoxy silicone oil or silane coupling agent as compatibilizers. These compatibilizers have good compatibility with polysiloxane, but poor compatibility with thermoplastic resins.

Method used

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  • Compatibilization method of silicon-based thermoplastic elastomer and obtained silicon-based thermoplastic elastomer
  • Compatibilization method of silicon-based thermoplastic elastomer and obtained silicon-based thermoplastic elastomer
  • Compatibilization method of silicon-based thermoplastic elastomer and obtained silicon-based thermoplastic elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] The raw material ratio of silicon-based thermoplastic elastomer is shown in Table 1. Its preparation method is,

[0085] (1) Adding compatibilizer, white carbon black, and hydroxyl silicone oil to methyl vinyl silicone rubber, and pre-mixing in an internal mixer to obtain a mixed rubber;

[0086] (2) physically blending the rubber compound and thermoplastic polyurethane into a melt in an internal mixer at 200°C;

[0087] (3) The molten material is injected into a twin-screw extruder at 180°C, and at the same time, hydrogen-containing silicone oil and a platinum catalyst are added in partitions for dynamic vulcanization, and pelletized to obtain a high-resilience silicon-based thermoplastic elastomer.

[0088] The compatibilizer is selected as compatibilizer 1, and the structural formula of compatibilizer 1 is shown in Table 3.

[0089] Compatibilizer 1 is prepared by adding 49.5 g of glutaric acid to 10 g of alkylsiltriol-terminated polysiloxane with a molecular weigh...

Embodiment 2

[0091] The difference between this example and Example 1 lies in that the raw material ratio of the silicon-based thermoplastic elastomer is different, see Table 1 for details. Compatibilizer is with embodiment 1.

Embodiment 3

[0093] The difference between this example and Example 1 lies in that the raw material ratio of the silicon-based thermoplastic elastomer is different, see Table 1 for details. Compatibilizer is with embodiment 1.

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Abstract

The invention relates to the technical field of preparation of dynamically vulcanized thermoplastic elastomers, and discloses a compatibilization method of a silicon-based thermoplastic elastomer. The compatibilization method comprises the following steps: blending polysiloxane rubber with a compatibilizer, a reinforcing filler and a structure control agent, and premixing in an internal mixer to obtain premixed rubber; blending the premixed rubber with thermoplastic resin, and mixing in an internal mixer to obtain a rubber-plastic melt; adding the rubber-plastic melt into a screw extruder, adding a cross-linking agent and a catalyst in different regions for dynamic vulcanization, and granulating after vulcanization to obtain the silicon-based thermoplastic elastomer; the structural formula of the compatibilizer is shown as I. After the compatibilizer adopted in the technology is combined with the polysiloxane, the polarity of the polysiloxane can be remarkably improved, so that the polysiloxane and the thermoplastic resin have excellent compatibility.

Description

technical field [0001] The invention belongs to the technical field of preparation of dynamically vulcanized thermoplastic elastomers, and in particular relates to a method for increasing the volume of silicon-based thermoplastic elastomers and the obtained silicon-based thermoplastic elastomers. Background technique [0002] Since entering the information age, artificial intelligence has become the focus of current development. As a development direction in the field of artificial intelligence, wearable smart devices have an irreplaceable position in various fields. It can make people's lives more convenient and Intelligence makes work more efficient. As one of the main materials of wearable smart devices, silicon-based thermoplastic elastomer has excellent properties such as silky touch, no sticky dust, no precipitation, no stickiness, and easy mold release, so that it can meet the requirements of wearable smart devices And is widely used. [0003] Silicon-based thermopl...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08L77/02C08L83/07C08L83/04C08L83/05C08L83/10C08K7/26
CPCC08L75/04C08L77/02C08L2205/035C08L2205/025C08L2205/08C08L83/04C08L83/10C08K7/26
Inventor 徐龙平陈良兵王伟杰黄文
Owner CHENGDU SILIKE TECH
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