Flexible polypropylene with high impact strength

A technology of impact strength and polypropylene composition, applied in the field of polypropylene composition, can solve the problem of lowering the melting point of polypropylene composition, and achieve the effects of reduced shrinkage, high flexibility and high melting point

Inactive Publication Date: 2011-05-04
ボレアリステクノロジーオイ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in a decrease in the melting point of the polypropylene composition

Method used

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  • Flexible polypropylene with high impact strength
  • Flexible polypropylene with high impact strength
  • Flexible polypropylene with high impact strength

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0169] 1. Materials

[0170] Compound:

[0171] Silicon group-containing polymer (example of component (B) in the first and second embodiments)

[0172] For cable insulators, high-voltage low-density ethylene terpolymer (LE4481), wherein the content of vinyltrimethylsilane is 1.75wt.%, and the content of butyl acrylate is about 17wt.%. The MFR of the cable insulator 2 (190℃ / 2.16kg) is 5g / 10min, the density is 927kg / m 3 , available from Borealis Polyolefine GmbH.

[0173] Propylene polymer 1 (PP1) (example of matrix phase (A) in the first embodiment)

[0174] As known in the art, polypropylene resin PP1 is a homogeneous-random-heterophase polypropylene copolymer composition prepared by a multi-stage polymerization process consisting of a loop reactor and two gas phase reactors using A conventional heterogeneous Ziegler-Natta catalyst system consisting of MgCl 2 -Supported TiCl 4 Catalyst and internal electron donor, triethylaluminum as cocatalyst and organosilane as externa...

Embodiment 3

[0188] 98.9wt.% of PP1 is used as matrix phase, with 0.95wt.% of silicon group-containing polymer (LE4481), 0.05wt.% of catalyst masterbatch CAT-MB50 and 0.1wt.% of Irganox B225 (available from Ciba )use together.

Embodiment 4

[0190] 97.9 wt.% PP1 was used as matrix phase together with 2 wt.% polymer containing silicon groups (LE4481) and 0.1 wt.% Irganox B225 (from Ciba).

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Abstract

The present invention is directed to a first polypropylene composition comprising a propylene copolymer as matrix phase (A) comprising a homo/random/block copolymer consisting of a) a propylene homopolymer (A1); b) a propylene random copolymer (A2); and c) an ethylene-propylene rubber (EPR) (A3) and a polyolefin (B) dispersed in the matrix phase (A), which comprises hydrolysable silicon-containing groups. The present invention is furthermore directed to a second polypropylene composition comprising a matrix phase (A) comprising a propylene homo- or copolymer with an impact strength at + 23 DEG C of at least 40.0 kJ/m<2> in a Charpy notched test according to ISO 179-1eA:2000 and a polyolefin (B) dispersed in the matrix phase (A), which comprises hydrolysable silicon-containing groups. The invention is furthermore directed to a production process for the polypropylene compositions and an article made thereof.

Description

technical field [0001] The present invention relates to a polypropylene composition containing an optionally crosslinkable dispersed phase having high impact strength, a process for its preparation, and its use in different applications such as wire / cable, pipes and pipes. Background technique [0002] Due to their chemical and heat resistance as well as mechanical strength, polypropylenes are used in different applications like wires / cables, pipes and tubes. [0003] US 6,455,637 describes a heterophasic polypropylene composition suitable for crosslinking reactions in which a polyolefin containing silane groups is mixed with polypropylene. However, the cross-linking reaction must be carried out at a humidity of 90-100% and a temperature of 85°C. These reaction conditions negatively affect the molecular structure of the polypropylene composition as well as the good mechanical properties of the composition and will accelerate physical and chemical aging, including aging afte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L23/16C08L23/08
CPCC08L23/0892C08L23/10C08L23/12C08L23/14C08L23/142C08L23/16C08L2666/06
Inventor 马库斯·加尔艾特纳多里斯·马赫尔卡贾·克利姆克松·范
Owner ボレアリステクノロジーオイ
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