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High-performance EPDM (Ethylene-Propylene-Diene Monomer)/PP(Polypropylene)/NBR(Nitrile -Butadiene Rubber) ternary

A thermoplastic elastomer and dynamic vulcanization technology, applied in the field of polymer materials, can solve the problems of oil resistance, wear resistance and poor air tightness, and achieve the effect of good oil resistance and simple preparation method

Active Publication Date: 2010-10-20
徐东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a large number of sealing strips, sheaths, gaskets, etc. are transferred to TPV, but in some occasions with high requirements, such as high-seal sealing strips, high wear-resistant and oil-resistant parts, traditional EPDM / PP type TPV There are deficiencies, poor oil resistance, wear resistance and air tightness, and cannot meet the requirements of the material

Method used

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  • High-performance EPDM (Ethylene-Propylene-Diene Monomer)/PP(Polypropylene)/NBR(Nitrile -Butadiene Rubber) ternary

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] EPDM is 35% by weight (the following are all weight ratios), PP 30%, NBR 10%, PP-g-MAH 3%, weighed and poured into the mixer, stir evenly, and then press 5% of phenolic resin beads, 0.5% stannous chloride, 0.4% zinc oxide, 1010 / 1680.2 / 0.2%, 0.7% zinc stearate were weighed, poured into a blender and stirred evenly. Add the mixed materials into the hopper of the twin-screw extruder, and add 15% rubber oil into the extruder from the plasticizing section of the extruder through a liquid metering pump, melt and blend, extrude and granulate to form a compound Material. Among them, the temperature settings of each heating zone of the screw are: zone 1 temperature: 160°C; zone 2: 170°C; zone 3: 180°C; zone 4: 170°C; head: 180°C; residence time 2-3min. The pressure is 14MPa.

Embodiment 2

[0051] EPDM is 32% by weight (the following are all weight ratios), PP 28%, NBR 15%, PP-g-MAH 3%, weighed and poured into the mixer, stir evenly, and then press 5% of phenolic resin beads, 0.5% stannous chloride, 0.4% zinc oxide, 1010 / 1680.2 / 0.2%, 0.7% zinc stearate were weighed, poured into a blender and stirred evenly. Add the mixed materials into the hopper of the twin-screw extruder, and add 15% rubber oil into the extruder from the plasticizing section of the extruder through a liquid metering pump, melt and blend, extrude and granulate to form a compound Material. Among them, the temperature settings of each heating zone of the screw are: zone 1 temperature: 160°C; zone 2: 170°C; zone 3: 180°C; zone 4: 170°C; head: 180°C; residence time 2-3min. The pressure is 14MPa.

Embodiment 3

[0053] EPDM is 30% by weight (the following are all weight ratios), PP 25%, NBR 20%, PP-g-MAH 3%, weighed and poured into the mixer, stir evenly, and then press phenolic resin 5%, chlorine 0.5% stannous oxide, 0.4% zinc oxide, 1010 / 1680.2 / 0.2%, 0.7% zinc stearate were weighed, poured into a blender and stirred evenly. Add the mixed materials into the hopper of the twin-screw extruder, and add 15% rubber oil into the extruder from the plasticizing section of the extruder through a liquid metering pump, melt and blend, extrude and granulate to form a compound Material. Among them, the temperature settings of each heating zone of the screw are: zone 1 temperature: 160°C; zone 2: 170°C; zone 3: 180°C; zone 4: 170°C; head: 180°C; residence time 2-3min. Pressure is 14MPa Performance test:

[0054] Tensile strength is tested according to the GB / T 528 standard. The sample type is a type sample. The stretching speed is 200mm / min;

[0055] The oil resistance test is carried out acco...

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Abstract

The invention discloses a high-performance EPDM (Ethylene-Propylene-Diene Monomer) / PP(Polypropylene) / NBR(Nitrile-Butadiene Rubber) ternary blending dynamic vulcanized thermoplastic elastomer and a preparation method thereof. The high-performance EPDM / PP / NBR ternary blending dynamic vulcanized thermoplastic elastomer comprises the following components in percentage by weight: 20-50 percent of ethylene-propylene-diene monomer, 20-50 percent of polypropylene, 10-20 percent of nitrile-butadiene rubber, 2-30 percent of rubber oil, 2-5 percent of compatilizer, 3-6 percent of phenolic resin, 0.4-0.6percent of stannous chloride, 0.2-0.6 percent of weather-resistant agent, 0.2-0.6 percent of heat stabilizer and 0.5-1 percent of lubricating agent. The prepared high-performance EPDM / PP / NBR ternary blending dynamic vulcanized thermoplastic elastomer not only has the characteristics of oxidation resistance, ozone resistance, high mechanical property, easy forming and the like of the traditional TPV (Thermoplastic Vulcanizate), but also has favorable oil resistance, wear resistance and airtightness.

Description

[technical field] [0001] The invention relates to the technical field of polymer materials, in particular to a high-performance EPDM / PP / NBR ternary blend dynamically vulcanized thermoplastic elastomer and a preparation method thereof. [Background technique] [0002] EPDM (ethylene propylene diene monomer) and PP (polypropylene) in the presence of a vulcanization system, through the action of high temperature and high shear, while blending, the crushed EPDM particles achieve a high degree (>95%) of crosslinking , the sea phase (continuous phase) is plastic PP, and the island phase (dispersed phase) is cross-linked EPDM particles of <2 μm, usually called thermoplastic vulcanizate (English is Thermoplastic Vulcanizate), referred to as TPV. The physical properties and functions of TPV at room temperature are similar to those of thermosetting rubber. At high temperatures, they behave like thermoplastics and can be processed quickly, economically and conveniently. [0003] ...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08L23/12C08L9/02C08L91/00C08L61/06C08L51/06C08K13/02C08K3/22B29C47/92B29C48/92
CPCB29C48/04
Inventor 徐东徐永周兵
Owner 徐东
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