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Heterophasic polypropylene with high flowability and excellent low temperature impact properties

A technology of heterogeneous polypropylene and propylene, which is applied in the production of such a polypropylene resin and the production of products, can solve the problems of β-crystal nucleating agent turbid materials, material inapplicability and transparency, etc.

Active Publication Date: 2011-05-11
ボレアリステクノロジーオイ
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, β-form nucleating agents produce very turbid materials, so the resulting materials are not suitable for applications where transparency is required

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0165] 1. Method

[0166] a) Melt flow rate

[0167] Determined according to ISO 1133 and expressed in g / 10min melt flow rate (MFR). The MFR stands for the flowability of the polymer, and thus the processability of the polymer. The higher the melt flow rate, the lower the viscosity of the polymer. The MFR of the polypropylene 2 It was determined at a temperature of 230°C and a load of 2.16kg.

[0168] b) Xylene soluble fraction

[0169] The xylene soluble fraction (XCS) as defined and described in the present invention is determined as follows: 2.0 g of polymer are dissolved in 250 ml of para-xylene at 135°C with stirring. After 30 minutes, the solution was allowed to cool at room temperature for 15 minutes and then allowed to stand at 25±0.5°C for 30 minutes. The solution was filtered through filter paper into two 100 ml flasks. The solution from the first 100 ml vessel was evaporated under nitrogen flow and the residue was vacuum dried at 90°C until constant weight wa...

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Abstract

The present invention relates to a heterophasic polypropylene resin comprising a propylene homo- or copolymer matrix (A) and an ethylene-propylene rubber phase (B) dispersed within the matrix, wherein the heterophasic polypropylene resin has a fraction insoluble in p-xylene at 25 DEG C (XCU) with an intrinsic viscosity of 1.5 dl / g or less, determined according to DIN EN ISO 1628-1 and -3 and an amount of propylene monomer units of at least 95 mol%, and a fraction soluble in p-xylene at 25 DEG C (XCS) with an intrinsic viscosity of 1.5 to 3.0 dl / g, determined according to DIN EN ISO 1628-1 and -3, and an amount of propylene monomer units of 50 to 75 mol%, and a MFR (2.16 kg, 230 DEG C) of more than 100 g / 10 min, determined according to ISO 1133, a heterophasic polypropylene composition comprising such a resin, a process for preparing that resin, and an article made thereof.

Description

technical field [0001] The present invention relates to a heterophasic polypropylene resin with high flow properties and excellent low temperature impact properties comprising a propylene homopolymer or copolymer matrix and an ethylene-propylene rubber phase dispersed in the matrix. In addition, the present invention also relates to a process for producing such a polypropylene resin and the use of such a polypropylene for producing articles. Background technique [0002] Well known commercially available polypropylenes are generally isotactic semi-crystalline thermoplastic polymer materials. A major application area for polypropylene is injection-molded thin-walled products. Typical examples include plastic cups, pallets and small containers mainly used for food packaging. In order to be suitable for thin-wall injection molding, polypropylene should have excellent processability / flow, typically manifested by a high melt flow rate (MFR), ie, low average molecular weight. H...

Claims

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Application Information

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IPC IPC(8): C08L23/10C08L23/16
CPCC08L23/10C08L23/16C08L2308/00C08L2314/06C08L2666/06
Inventor 斯韦恩·内恩塞斯彼得·多斯海韦
Owner ボレアリステクノロジーオイ
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