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Low-temperature-resistant low-hardness thermoplastic elastomer and preparation method thereof

A thermoplastic elastomer, low hardness technology, used in the field of polymer elastomers, can solve the problems of oil precipitation, large permanent deformation of products, poor dispersibility, etc., to improve the interface condition, good low temperature resistance and good dispersibility Effect

Active Publication Date: 2021-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rubber filling oil is to fill oil into rubber at room temperature, and melt and mix with plastic at high temperature, but there are disadvantages such as crystallization of plastic as the temperature decreases, resulting in oil precipitation.
[0004] In order to make the thermoplastic elastomer material obtained by dynamic vulcanization have certain mechanical properties, fillers are usually added to the blend, such as adding carbon black and silica, but the permanent deformation of the product will be large due to poor dispersion.

Method used

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  • Low-temperature-resistant low-hardness thermoplastic elastomer and preparation method thereof
  • Low-temperature-resistant low-hardness thermoplastic elastomer and preparation method thereof
  • Low-temperature-resistant low-hardness thermoplastic elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Weigh 80 parts of powdered styrene-butadiene rubber containing carbon nanotubes, 20 parts of PP230G, 5 parts of PIB1300, 5 parts of vulcanizing agent BPDH, and 1 part of accelerator TAIC, and premix them in an internal mixer for 5 minutes to make a premix, and then Put the premixed material into the twin-screw extruder for reaction extrusion, granulation, the temperature is controlled at 160-165°C, the screw rotation frequency is 5Hz, and then the pellets are pressed on the Brabender single-screw extruder at 170-185°C A 2mm thick TPV sheet is produced, and a dumbbell-shaped sample is cut out by a sample making machine.

Embodiment 2

[0040] Weigh 75 parts of powdered styrene-butadiene rubber containing carbon nanotubes, 25 parts of PP230G, 20 parts of PIB1300, 1 part of vulcanizing agent BPDH, and 0.1 part of accelerator TAIC, and premix them in an internal mixer for 5 minutes to make a premix, and then Put the premixed material into the twin-screw extruder for reaction extrusion, granulation, the temperature is controlled at 160-165°C, the screw rotation frequency is 5Hz, and then the pellets are pressed on the Brabender single-screw extruder at 170-185°C A 2mm thick TPV sheet is produced, and a dumbbell-shaped sample is cut out by a sample making machine.

Embodiment 3

[0042] Weigh 68 parts of powdered styrene-butadiene rubber containing carbon nanotubes, 32 parts of PP230G, 10 parts of PIB1300, 3 parts of vulcanizing agent BPDH, and 0.5 parts of accelerator TAIC and pre-mix them in an internal mixer for 5 minutes to make a premix, and then Put the premixed material into the twin-screw extruder for reaction extrusion, granulation, the temperature is controlled at 160-165°C, the screw rotation frequency is 5Hz, and then the pellets are pressed on the Brabender single-screw extruder at 170-185°C A 2mm thick TPV sheet is produced, and a dumbbell-shaped sample is cut out by a sample making machine.

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Abstract

The invention relates to a low-temperature-resistant low-hardness thermoplastic elastomer and a preparation method thereof, and belongs to the field of high-molecular elastomers. The low-temperature-resistant low-hardness thermoplastic elastomer is prepared from the following raw materials in parts by mass: 10-40 parts of polypropylene resin, 60-90 parts of powdered styrene-butadiene rubber containing carbon nanotubes, 5-20 parts of polyisobutene, 1-5 parts of a vulcanizing agent, and 0.1-1 part of an accelerant. According to the invention, styrene-butadiene rubber and polypropylene resin are taken as basic raw materials, a dynamic vulcanization technology is adopted, the powdered styrene-butadiene rubber containing carbon nanotubes is prepared by a co-flocculation process of a carbon nanotube emulsion and a styrene-butadiene rubber emulsion, the powdered styrene-butadiene rubber is blended with polypropylene resin, and low-molecular-weight polyisobutene is used for oil-filled softening to prepare the low-temperature-resistant low-hardness thermoplastic elastomer. The problem of large permanent deformation caused by poor dispersibility of the filler is solved by using the co-flocculation process of the carbon nanotube emulsion and the styrene-butadiene rubber emulsion, the hardness of the TPV product is reduced by filling the low-molecular-weight polyisobutene, and the TPV has excellent low-temperature resistance.

Description

technical field [0001] The invention relates to a low-temperature-resistant and low-hardness thermoplastic elastomer and a preparation method thereof, belonging to the field of polymer elastomers. Background technique [0002] Dynamic vulcanization thermoplastic elastomer (TPV) is a thermoplastic elastomer prepared by dynamic vulcanization process. TPV is mainly composed of two parts, one is rubber as the dispersed phase, and the other is plastic as the continuous phase. In recent years, due to its excellent performance, the application value of thermoplastic elastomers has become more and more prominent. It has the elasticity of rubber at room temperature, and can process like thermoplastics when heated. The processing technology is simple, and the scraps can be reused. It saves energy and meets the requirements of the latest national environmental protection policy. It is widely used in automotive materials, electronics, wire and cable and other fields. It is one of the k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/06C08L23/12C08L23/20C08K9/04C08K3/04C08K5/14C08K5/3492C08J3/215
CPCC08L9/06C08J3/215C08J2309/06C08L2207/04C08L2205/08C08L23/12C08L23/22C08K9/04C08K3/041C08K5/14C08K5/34924
Inventor 王晓敏刘浩刘容德王晶张新华孙丽朋王秀丽高磊
Owner CHINA PETROLEUM & CHEM CORP
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