Polypropylene complex and preparation method thereof

A technology for polypropylene and composites, which is applied in the field of polypropylene composites and its preparation, can solve problems such as dents, easy shrinkage cavities, large shrinkage range and shrinkage value, etc., and achieve reduced molding shrinkage, increased mechanical properties, Effect of preventing degradation and aging

Inactive Publication Date: 2012-06-20
广东奇德新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2. Good fluidity, but large shrinkage range and shrinkage value, prone to shrinkage cavity, dent, deformation
[0007] For the above-mentioned polypropylene in the prior art, especially for the large shrinkage range and shrinkage value of polypropylene, shrinkage cavities, dents, and deformation are prone to occur. In order to reduce the impact of existing polypropylene on the stability of moldings Big trouble, this invention uses blending technology to develop a PP composite material with high molding stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0051] In addition, the embodiment in the present invention also relates to the technical scheme of the preparation method of the polypropylene composite, and the preparation steps of the polypropylene composite are:

[0052] ① Put the polypropylene into the dehumidification dryer, dry and dehumidify for 8 hours;

[0053] ②Put polypropylene, talc, rubber, primary antioxidant, secondary antioxidant, light stabilizer, polyethylene wax and dispersant after drying and dehumidification into a high-speed mixer and mix for 5 minutes before use;

[0054] ③ Put the mixture in the above ② into the twin-screw extruder, and extrude the polyethylene compound through the twin-screw extruder;

[0055] ④The polypropylene compound is water-cooled and formed through the cooling water tank, then drawn into strips, air-dried after the strips are drawn, and then cut by a pelletizer to form polypropylene compound particles;

[0056] ⑤Screen the polypropylene composite particles, and then pack the ...

Embodiment 2

[0063] Present embodiment 2 changes on the basis of embodiment 1, and it is specifically as follows:

[0064] Retain the preparation method of the polypropylene composite in Example 1, mainly to change the component ratio of the polypropylene composite, specifically as follows: the composite is composed of 69.4% by mass percentage of polypropylene, 20% by mass of talc , 10% by mass of rubber, 0.05% by mass of primary antioxidant, 0.10% by mass of secondary antioxidant, 0.15% by mass of light stabilizer, 0.15% by mass of polyethylene wax And the mass percentage is the dispersant composition of 0.15%. The use ratio of the above-mentioned primary antioxidant and secondary antioxidant is 1:2.

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PUM

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Abstract

The invention discloses a polypropylene complex. The polypropylene complex comprises, by mass, 59.15-69.4% of polypropylene (PP), 20-25% of talcum (Talc), 10-15% of rubber, 0.05-0.1% of a main antioxidant, 0.10-0.15% of a secondary antioxidant, 0.15-0.2% of a light stabilizer, 0.15-0.2% of polyethylene wax and 0.15-0.2% of a dispersing agent. The present invention further relates to a preparation method for the polypropylene complex. The forming shrinkage of the polypropylene complex is decreased, and the mechanical properties of the polypropylene complex are significantly increased, such that the PP can be effectively prevented from degradation aging during the processing and using process.

Description

technical field [0001] The invention relates to a polypropylene compound and a preparation method thereof, in particular to a polypropylene compound which is added with a certain amount of rubber to reduce molding shrinkage and significantly increase mechanical properties and a preparation method thereof. Background technique [0002] Polypropylene (PP) is a semi-crystalline material that is harder and has a higher melting point than PE. PP material has a low heat distortion temperature (100°C), low transparency, low gloss, and low rigidity, but has stronger impact strength. The impact strength of PP increases with the increase of ethylene content. The Vicat softening temperature of PP is 150C. Due to the high crystallinity, the surface stiffness and scratch resistance of this material are very good, and PP does not have the problem of environmental stress cracking. Usually, PP is modified by adding glass fiber, metal additives or thermoplastic rubber. The flow rate MFR of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/16C08L23/22C08L11/00C08L33/04C08L71/00C08K13/02C08K3/34C08K5/134C08K5/526B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/92704B29C2948/92895
Inventor 饶德生
Owner 广东奇德新材料股份有限公司
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