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Profax composition with excellent rigidity and toughness

A polypropylene resin and composition technology, which is applied in the field of polypropylene resin composition, can solve the problems of difficult impact resistance, decreased affinity, decreased dispersion of inorganic fillers, etc., and achieves excellent heat resistance and rigidity. Excellent strength

Inactive Publication Date: 2009-02-18
LG CHEM TIANJIN ENG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the affinity between inorganic fillers and polypropylene decreases, and due to the decrease in the dispersibility of inorganic fillers and the decrease in interfacial bonding ability, it is difficult to be used in fields that require impact resistance, such as bumpers and interior parts of automobiles.

Method used

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  • Profax composition with excellent rigidity and toughness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1: Preparation of polypropylene resin with excellent rigidity and toughness

[0050] It is composed of 56wt% ethylene content of 5wt%, MI of 10g / 10min high crystalline polypropylene copolymer, 10wt% of ethylene / octene-1 (α olefin) with Mooney viscosity (ML1+4, 121℃) of 35 ) Copolymer elastomer, 14wt% of olefin partially crosslinked elastomer, 20wt% of fine talc with an average particle size of 3μm is added to 100wt% of the composition, relative to 100wt% of the composition, 0.3wt% of the mixture is added The fatty acid derivatives of metal salts and ammonia compounds and 1.3wt% of other additives are mixed together with a stirrer. In a twin-screw extruder with a diameter of 40 mm, an aspect ratio of 42, and a temperature of 200 to 230°C, the mixture was fed at a rate of 50 kg / h to produce a pelletized polypropylene resin composition.

Embodiment 2—3、 comparative example 1

[0051] Example 2-3, Comparative Example 1: Preparation of polypropylene resin with excellent rigidity and toughness

[0052] According to the mixing ratio described in Table 1, the resin composition was prepared by the method described in Example 1. The unit is wt%, and the ratio of fatty acid derivatives and other additives is calculated by induction.

[0053] Table 1

[0054] Example 1 Example 2 Example 3 Comparative example 1 Highly crystalline polypropylene

Embodiment 4

[0055] Example 4: Evaluation of physical properties

[0056] The physical properties of the resin composition of Example 1 and Example 3, and Comparative Example 1 were tested by the following equipment and measurement methods. The results are shown in Table 2. The low-temperature stress at 50mm / min and -30℃ was measured by ZWOCK Z010UTM. The result is shown in Figure 1. The low-temperature adjustment uses an adjustable ±1℃ fine adjustment.

[0057] Flexural modulus: ASTM D790

[0058] Tensile strength and elongation: ASTM D638

[0059] Notched impact strength: ASTM D256

[0060] Heat distortion temperature: ASTM D684

[0061] Melt Index (MI): ASTM D1238

[0062] Table 2

[0063]

[0064] As shown in Table 2 and Figure 1, the polypropylene resin composition containing the olefin-based partially crosslinked elastomer of Examples 1 to 3 has a better room temperature and better than the polypropylene resin composition of Comparative Example 1. Low temperature toughness, notched imp...

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Abstract

The invention provides a polypropylene resin composite with excellent rigidity and toughness, comprising: a) polypropylene resin; b) ethane / Alpha-olefin copolymer elastic body; c) olefin partial crosslinking elastic body; and d) inorganic filler. The polypropylene resin composite prepared by the invention has excellent rigidity, toughness and notch impact strength, and is capable of reaching excellent rigidity and physical balance of heat tolerance, and particularly, excellent physical balance of low-temperature toughness and rigidity.

Description

Technical field [0001] The present invention relates to a polypropylene resin composition having excellent rigidity and toughness. Specifically, it has excellent notched impact strength, and can achieve an excellent balance of rigidity and heat resistance, especially low-temperature toughness and rigidity. Polypropylene resin composition with excellent rigidity and toughness. Background technique [0002] Generally, polypropylene resin has excellent rigidity and impact strength under normal temperature and high temperature conditions, but low temperature toughness and impact strength are low, and therefore, its application is greatly restricted. [0003] At present, in order to improve the toughness and impact strength of polypropylene resin, ethylene is added during polymerization to prepare polypropylene copolymer to achieve the purpose, but the ideal impact resistance cannot be achieved. In addition, in extrusion processing such as ethylene-propylene copolymer For rubber compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K5/3492C08L23/16C08K5/14C08K3/00
Inventor 李昌邑李彦锡吴光锡
Owner LG CHEM TIANJIN ENG PLASTIC
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