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A kind of polypropylene composition and preparation method thereof

A polypropylene composition and polypropylene technology, applied in the field of polypropylene composition and its preparation, can solve the problems of insufficient toughness of polypropylene, achieve good fluidity, reduce costs, and solve the effects of broken bars

Active Publication Date: 2019-01-29
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the defect of insufficient toughness of polypropylene, the purpose of the present invention is to provide a polypropylene composition, which has good toughness at room temperature and low temperature

Method used

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  • A kind of polypropylene composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Put 50 parts of homopolymer polypropylene, 5 parts of metallocene propylene-ethylene elastomer, 10 parts of polypropylene wax, 20 parts of talcum powder, 0.1 part of antioxidant 1010, and 0.2 part of antioxidant 168 into a high-speed mixer to dry Mix for 3-5 minutes, melt and extrude the mixed raw materials with a twin-screw extruder, and granulate. The temperature of the feed section is 160°C, the temperature of the compression section is 180°C, the temperature of the plasticizing section is 200°C, the temperature of the homogenization section is 200°C, and the temperature of the die opening is 190°C.

Embodiment 2

[0043] Put 70 parts of random copolymer polypropylene, 3 parts of metallocene propylene-ethylene elastomer, 5 parts of polypropylene wax, 12 parts of calcium carbonate, 0.15 parts of antioxidant 1010, and 0.3 parts of antioxidant 168 into a high-speed mixer Dry mix for 3-5 minutes, melt and extrude the mixed raw materials with a twin-screw extruder, and granulate. The temperature of the feed section is 180°C, the temperature of the compression section is 220°C, the temperature of the plasticizing section is 220°C, the temperature of the homogenization section is 220°C, and the temperature of the die mouth is 220°C.

Embodiment 3

[0049] Put 90 parts of block copolymer polypropylene, 1 part of metallocene propylene-ethylene elastomer, 1 part of polypropylene wax, 5 parts of barium sulfate, 0.2 part of antioxidant 1010, and 0.4 part of antioxidant 168 into a high-speed mixer Dry mix for 3-5 minutes, melt and extrude the mixed raw materials with a twin-screw extruder, and granulate. The temperature of the feed section is 170°C, the temperature of the compression section is 200°C, the temperature of the plasticizing section is 210°C, the temperature of the homogenization section is 210°C, and the temperature of the die mouth is 200°C.

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Abstract

The invention discloses a polypropylene composition and a preparation method thereof. The composition is prepared from the following components in parts by weight: 50-90 parts of polypropylene, 1-5 parts of metallocene propylene-ethylene elastomer, polypropylene 1-10 parts of propylene wax, 5-20 parts of inorganic filler, 0.3-0.6 parts of antioxidant. In the present invention, the metallocene propylene-ethylene elastomer and polypropylene wax are added at the same time, and the toughening effect is 2-3 times that of adding the metallocene propylene-ethylene elastomer alone, which greatly improves the toughening effect of the polypropylene composition. In the process of granulation, problems such as broken strips and hollow particles can also be solved. The amount of metallocene propylene-ethylene elastomer used in the present invention is very small, only 1-5 parts, compared with 10-30 parts of general toughening aids. The added amount of parts is very small, thereby reducing the cost of the composition.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and relates to a polypropylene composition and a preparation method thereof. Background technique [0002] Polypropylene (PP) has a simple synthesis process, good balance, easy processing, high performance and low price, and has become one of the fastest growing varieties of plastics. However, the poor toughness of polypropylene, especially at low temperature, limits its application. [0003] There are many ways to improve the toughness of polypropylene, and there are two main ways: [0004] 1. Chemical modification, adding a certain amount of ethylene during the polymerization of polypropylene, allowing ethylene and propylene to copolymerize to form ethylene-propylene rubber for toughening; [0005] 2. Physical modification, toughening by melt blending polypropylene and elastomer. [0006] At present, the most common method of toughening polypropylene is achieved by melt b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/14C08L53/00C08L23/16B29B9/06B29C48/92
Inventor 杨桂生方永炜
Owner HEFEI GENIUS NEW MATERIALS