Polypropylene composite material and preparation method thereof

A technology for composite materials and polypropylene, applied in the field of polypropylene composite materials and its preparation, to achieve obvious impact strength at room temperature and low temperature impact strength, and improve the impact strength at room temperature and low temperature impact strength

Inactive Publication Date: 2009-11-11
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of improving the impact performance of polypropylene in the prior art, and significantly improve its impact resistance under the condition that the rigidity of the polypropylene material will not be significantly reduced, so as to realize the rigidity and toughness of the modified material. balance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) 10g of ultra-fine calcium carbonate filler with a size of 6000 meshes is first subjected to surface coupling treatment with stearic acid and then surface treated with aluminate. The amount of stearic acid is 0.2g, and the treatment temperature is 120°C; The amount of ester is 0.15g, and the treatment temperature is 120°C;

[0026] (2) 100 parts by weight of homopolyisotactic polypropylene resin, 7 parts by weight of ethylene propylene rubber, and 14 parts by weight of processed ultrafine calcium carbonate filler are directly put into a high-speed mixer for initial mixing, and mixed under room temperature uniform, and then moved into a twin-screw extruder to knead evenly, the kneading temperature is 210°C, and the polypropylene composite material of the present invention can be obtained by water-cooling and pelletizing.

Embodiment 2

[0028] (1) 10g of ultra-fine calcium carbonate filler with a size of 7000 meshes is first subjected to surface coupling treatment with stearic acid and then surface-treated with aluminate. The amount of stearic acid is 0.02g, and the treatment temperature is 90°C; The amount of ester is 0.05g, and the treatment temperature is 90°C;

[0029] (2) The homopolymerized isotactic polypropylene resin of 100 parts by weight, the ethylene octene copolymer of 15 parts by weight, the superfine calcium carbonate filler after the treatment of 30 parts by weight are directly put into the initial mixing in the high-speed mixer, room temperature condition down to mix evenly, and then move into a twin-screw extruder to mix evenly, the mixing temperature is 230°C, and the polypropylene composite material of the present invention can be obtained by water-cooling and pelletizing.

Embodiment 3

[0031] (1) 10g of ultra-fine calcium carbonate filler with a size of 6500 meshes is first subjected to surface coupling treatment with stearic acid and then surface-treated with aluminate. The amount of stearic acid is 0.1g, and the treatment temperature is 100°C; The amount of ester is 0.1g, and the treatment temperature is 100°C;

[0032] (2) 100 parts by weight of homopolymerized isotactic polypropylene resin, 10 parts by weight of ethylene propylene rubber, and 20 parts by weight of processed ultrafine calcium carbonate filler are directly put into a high-speed mixer for initial mixing, and mixed at room temperature uniform, and then moved into a twin-screw extruder to knead evenly, the kneading temperature is 220°C, and the polypropylene composite material of the present invention can be obtained by water-cooling and pelletizing.

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PUM

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Abstract

The invention discloses a polypropylene composite material which comprises 100 parts of polypropylene resin, 14 parts to 30 parts of super fine calcium carbonate filler with 6000 meshes to 7000 meshes and 7 parts to 15 parts of materials for elastic body. The surface treatment is carried out on the super fine calcium carbonate filler after the surface coupling treatment of the stearinic acid. Then the polypropylene resin, materials for the elastic body and the super fine calcium carbonate filler are directly put into a high-speed mixer for primary mixing, are mixed evenly at room temperature, and then is moved into a twin-screw extruding machine for even mixing and granulating. Compared with the prior art, the cost of the modified composite material filled by polypropylene equals to the cost of original polypropylene resin. In the invention, the enforcing conditions of the process is ordinary while the modified composite materials is on a par with the popypropylene resin before modification in rigidity and room-temperature impulse strength and low-temperature impulse strength are obviously improved.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a polypropylene composite material and a preparation method thereof. Background technique [0002] The existing polypropylene resin is widely used in the manufacture of vessels and various shells due to its high modulus, high strength and good temperature resistance. However, due to the poor impact resistance of polypropylene itself, polypropylene materials with good impact resistance and good rigidity, strength and temperature resistance are gradually being developed and applied. [0003] The means to improve the impact properties of polypropylene include the following: (1) introducing elastomer materials such as ethylene-propylene rubber and ethylene octene copolymer into polypropylene; (2) filling polypropylene with nano-particle fillers such as calcium carbonate . But introducing elastomeric materials into polypropylene leads to a significant reductio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K9/04C08L23/16C08L23/08
Inventor 李景庆马桂秋盛京
Owner TIANJIN UNIV
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