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Mineral/ whisker reinforced polypropylene composition

A polypropylene composition and polypropylene technology, applied in the field of polypropylene, can solve the problems of insufficient strength, stiffness and heat resistance, reduced material impact strength, and limited material application, etc., to solve the problem of dimensional instability and impact strength Improve and expand the effect of the application field

Inactive Publication Date: 2004-09-29
SHANGHAI WORTH IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As a general-purpose plastic, polypropylene has the characteristics of excellent processing performance, good mechanical properties, and chemical corrosion resistance. It occupies an important position in plastics, but its strength, stiffness, and heat resistance are far from satisfactory when making engineering components. At the same time, polypropylene has poor impact properties, especially poor low-temperature impact properties, large molding shrinkage, especially the disadvantages of uneven aspect ratio shrinkage when fiber is reinforced, which limits the application of polypropylene in engineering components
[0003] European patent EP-A496625 discloses a composite material of high crystalline polypropylene, which achieves the purpose of high stiffness by adding 30% talcum powder, but this leads to a decrease in the impact strength of the material, thereby limiting the application of the material, while the Japanese patent JP Zhao 56-149318 and Japanese patent JP Zhao 61-256920, JP flat 4-36092 have introduced the method for preparing magnesium salt whisker, and Chinese patent CN1288860A discloses a kind of preparation method of novel magnesium salt whisker, to it in polymer substances, especially in polypropylene applications are not involved

Method used

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  • Mineral/ whisker reinforced polypropylene composition
  • Mineral/ whisker reinforced polypropylene composition
  • Mineral/ whisker reinforced polypropylene composition

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Embodiment 1-4

[0034] Based on the blend of copolymerized polypropylene and homopolypropylene, talcum powder / magnesium salt whisker is used as reinforcing agent, PP-g-MAH is used as compatibilizer, POE rubber masterbatch is used as toughening agent, its weight The ratio is listed in Table 1,

[0035] Table 1: Weight ratio of mineral / whisker reinforced polypropylene composition components

[0036]

[0037] The preparation method of the present invention is as follows:

[0038] (1) Surface treatment of talcum powder with KH550;

[0039] (2) the surface of the magnesium salt whisker is treated with KH-550;

[0040] (3) Put polypropylene, copolymerized polypropylene, talcum powder, POE toughening masterbatch, PP graft compatibilizer, and antioxidant 1010 together in a high mixer and mix for 3 minutes;

[0041] (4) Add whisker magnesium salt whisker and mix at low speed for 1 minute;

[0042] (5) discharge;

[0043] (6) The mixed raw materials are placed in a twin-screw machin...

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Abstract

The mineral / whisker reinforced polypropylene composition consists of polypropylene, mineral reinforcer, toughening agglomarate, PP grafting compatilizer, antioxidant and other assistant and features the addition of / whisker reinforcer. The compounding process includes high speed mixing of the materials except the whisker reinforcer; adding magnesium salt whisker reinforcer and mixing at low temperature; and pelletizing in a special double-screw extruder at 170-240 deg.c and 180-600 rpm. The polypropylene composition has high strength, high rigidity, high impact resistance, high size stability and other features, and may be used in producing parts of automobile, air conditioner, washing machine, etc.

Description

technical field [0001] The invention relates to a mineral / whisker reinforced polypropylene composition, which can be used for vehicle parts, home appliance parts, etc., and belongs to the technical field of polypropylene. Background technique [0002] As a general-purpose plastic, polypropylene has the characteristics of excellent processing performance, good mechanical properties, and chemical corrosion resistance. It occupies an important position in plastics, but its strength, stiffness, and heat resistance are far from satisfactory when making engineering components. At the same time, polypropylene has poor impact properties, especially poor low-temperature impact properties, large molding shrinkage, especially the uneven aspect ratio shrinkage when fiber is reinforced, which limits the application of polypropylene in engineering components. [0003] European patent EP-A496625 discloses a composite material of high crystalline polypropylene, which achieves the purpose of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K7/10C08L23/08
Inventor 辛敏琦陈晓东孙洲渝杨涛
Owner SHANGHAI WORTH IND CO LTD
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