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Preparation of a silicone rubber thermoplastic elastomer

A thermoplastic elastomer and silicone rubber technology, applied in the field of preparation and thermoplastic elastomers, can solve problems such as poor mechanical properties, and achieve the effects of low production cost, satisfying recycling and reuse, and good repeatability.

Active Publication Date: 2016-06-22
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Silicone rubber is a special rubber with excellent high and low temperature resistance, weather resistance, ozone resistance, air permeability and physiological inertia. It can be used in many specific occasions, but its mechanical properties are poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7

[0059] At room temperature, add silicone rubber raw rubber-1, white carbon black, and structure control agent listed in Table 1 into the torque rheometer, and knead for 30 minutes to obtain silicone rubber. After taking it out, the torque rheometer The instrument was heated to 180°C, and the ethylene-vinyl acetate copolymer (EVA) listed in Table 1 and the prepared silicone rubber were added to the torque rheometer. Parts by weight of the cross-linking agent, the rotor speed is 60 rpm, blended and taken out after the torque is stable, to obtain a thermoplastic elastomer.

[0060] The above-mentioned thermoplastic elastomer was pressed and molded with a flat vulcanizer at 140°C, and the tensile stress, elongation at break, hardness and 100% modulus were tested, and the test results were recorded in Table 1.

[0061] Table 1

[0062]

Embodiment 8-12

[0064] At room temperature, add silicone rubber raw rubber-1, white carbon black, and structure control agent listed in Table 2 into the torque rheometer, and knead for 30 minutes to obtain silicone rubber. After taking it out, the torque rheometer The instrument was heated to 180°C, and the ethylene-vinyl acetate copolymer (EVA) listed in Table 2 and the prepared silicone rubber were added to the torque rheometer. Parts by weight of the cross-linking agent, the rotor speed is 60 rpm, blended and taken out after the torque is stable, to obtain a thermoplastic elastomer.

[0065] The above-mentioned thermoplastic elastomer was pressed and molded with a flat vulcanizer at 140°C, and the tensile stress, elongation at break, hardness and 100% modulus were tested, and the test results were recorded in Table 2.

[0066] Table 2

[0067] Formulation composition / weight part

[0068] As can be seen from the above Examples 8-12, in the thermoplastic elastomer of the present i...

Embodiment 13

[0070] The torque rheometer was heated to 180°C, and the thermoplastic elastomer obtained in Example 1 was pulverized and then added to the torque rheometer at a rotor speed of 60 rpm, blended and taken out after the torque was stable to obtain a thermoplastic elastomer. elastomer.

[0071] The above-mentioned thermoplastic elastomer was pressed and molded with a flat vulcanizer at 140°C, and the tensile stress, elongation at break, hardness and 100% modulus were tested, and the test results were recorded in Table 3.

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PUM

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Abstract

The invention discloses a thermoplastic elastomer, and a preparation method and application thereof. The thermoplastic elastomer comprises the following components in parts by weight: 13.63 to 95.41 parts of silicon rubber, 90 to 30 parts of ethylene-vinyl acetate copolymer, and 0.4425 to 4.125 parts of crosslinking system. The thermoplastic elastomer shows outstanding mechanical property, is simple in process, low in production cost, and excellent in processing reproducibility, and completely meets the recycling requirements.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a thermoplastic elastomer, a preparation method and an application thereof. Background technique [0002] Thermoplastic elastomer (TPE) refers to a material that exhibits the elasticity of rubber at room temperature and can be plasticized at high temperature. The thermoplastic elastomer obtained by dynamic vulcanization is called dynamically vulcanized thermoplastic elastomer (TPV). Dynamic vulcanization (Dynamic Vulcanization) refers to the melting and blending of rubber and plastic in a mixer with high shear field and high temperature field. Under the action of shear force and crosslinking agent, the rubber is sheared while crosslinking to form Fine particles, and uniformly dispersed in the plastic continuous phase, wherein the vulcanized rubber particles are the dispersed phase, and the plastic is the continuous phase. [0003] CN1445278A discloses a fully dynamic cross-link...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08L83/07C08L23/08C08L83/05C08J3/24
Inventor 杨其曹燊钊孙可
Owner SICHUAN UNIV
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