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Polypropylene modified material for expansion water tank of automobile and preparation method thereof

A technology of expansion water tank and modified material, applied in the field of polypropylene modified material and its preparation, can solve the problems of inability to meet the production and use requirements of the expansion water tank, poor creep resistance at high temperature, poor heat sealing and welding performance, etc., and achieve excellent The effect of oxidation resistance, high and high temperature creep resistance, high and low temperature impact strength

Inactive Publication Date: 2012-11-14
SHANDONG HUA TONG AUTOMOBILE MOLDS PLASTICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polypropylene is a plastic material commonly used in auto parts at present. It has the characteristics of rich sources, cheap price, easy processing, good mechanical properties, and low density. However, it also has low low-temperature impact strength and poor high-temperature creep resistance. Poor thermal welding performance and poor material transparency cannot meet the production and use requirements of the expansion tank, so it must be modified to improve its overall performance

Method used

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  • Polypropylene modified material for expansion water tank of automobile and preparation method thereof
  • Polypropylene modified material for expansion water tank of automobile and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0015] Ingredients: 75% propylene-ethylene block copolymer polypropylene, 20% linear low density polyethylene (LLDPE), 4.4% ethylene propylene diene monomer (EPDM), 0.3% sorbitol nucleating agent, hindered phenol antioxidant Agent 0.3%.

[0016] Preparation: Add the above-mentioned raw materials in proportion to a high-mixing pot for uniform mixing, and then extrude and granulate with a twin-screw extruder under the conditions of a processing temperature of 210-240°C and a screw speed of 210-240 rpm.

[0017] The other parts of this embodiment adopt the existing technology, which will not be repeated here.

[0018] The modified polypropylene material for automobile expansion water tank obtained in this example has excellent properties, and its properties are shown in Table 1.

Embodiment 2

[0020] Ingredients: propylene-ethylene block copolymer polypropylene 80%, linear low density polyethylene (LLDPE) 14.5%, ethylene propylene diene monomer (EPDM) 5%, sorbitol nucleating agent 0.2%, hindered phenol antioxidant Agent 0.3%.

[0021] Preparation: Add the above-mentioned raw materials in proportion to a high-mixing pot for uniform mixing, and then extrude and granulate with a twin-screw extruder under the conditions of a processing temperature of 210-240°C and a screw speed of 210-240 rpm.

[0022] The other parts of this embodiment adopt the existing technology, which will not be repeated here.

[0023] The modified polypropylene material for automobile expansion water tank obtained in this example has excellent properties, and its properties are shown in Table 1.

Embodiment 3

[0025] Ingredients: propylene-ethylene block copolymer polypropylene 85%, linear low density polyethylene (LLDPE) 10%, ethylene propylene diene monomer (EPDM) 4%, sorbitol nucleating agent 0.5%, hindered phenol antioxidant Agent 0.5%.

[0026] Preparation: Add the above-mentioned raw materials in proportion to a high-mixing pot for uniform mixing, and then extrude and granulate with a twin-screw extruder under the conditions of a processing temperature of 210-240°C and a screw speed of 210-240 rpm.

[0027] The other parts of this embodiment adopt the existing technology, which will not be repeated here.

[0028] The modified polypropylene material for automobile expansion water tank obtained in this example has excellent properties, and its properties are shown in Table 1.

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Abstract

The invention discloses a polypropylene modified material for an expansion water tank of an automobile and a preparation method thereof and belongs to the technical field of auto part manufacturing. The polypropylene modified material for the expansion water tank for the automobile comprises the following components in percentage by weight: 75-85 percent of propylene-ethylene block polypropylene copolymer, 10-20 percent of linear low density polyethylene (LLDPE) resin, 2-5 percent of ethylene propylene diene monomer (EPDM), 0.1-0.5 percent of nucleating agent and 0.1-0.5 percent of antioxidant. After being mixed according to the proportion, the materials are extruded and granulated by a double screw extruder under the conditions that the processing temperature is 210-240 DEG C, and the screw speed is 210-240 revolutions / minute. The polypropylene modified material has the beneficial effects that polypropylene is modified by the reasonable components according to the mixing proportion, so that the material has higher low-temperature impact strength and higher high-temperature creep resistance; and meanwhile, the hot plate welding performance of the material is improved, the material transparency is improved, and the production processing requirements and the use requirements of the expansion water tank for the automobile are completely satisfied.

Description

technical field [0001] The invention relates to a polypropylene modified material and a preparation method thereof, in particular to a polypropylene modified material for manufacturing an automobile expansion tank and a preparation method thereof. Background technique [0002] The expansion tank is a container for adding and compensating liquid in the cooling system. It compensates for the liquid lost in the system during the cooling process, and discharges the gas generated in the system through the pressure relief port to keep the system pressure stable. The working environment requires: Temperature: -40~100°C, Pressure: 2.5bar. [0003] Polypropylene is a plastic material commonly used in auto parts at present. It has the characteristics of rich sources, cheap price, easy processing, good mechanical properties, and low density. However, it also has low low-temperature impact strength and poor high-temperature creep resistance. Poor thermal welding performance and poor ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/00C08L23/08C08L23/16C08K5/053C08K5/13B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 葛衍鹍
Owner SHANDONG HUA TONG AUTOMOBILE MOLDS PLASTICS TECH
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