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Polypropylene-ultrahigh-molecular-weight-polyethylene composition

A technology of ultra-high molecular weight and composition, which is applied in the field of polypropylene-ultra-high molecular weight-polyethylene composition, which can solve the problems of poor resin dispersion and achieve high productivity, excellent fluidity, and excellent productivity.

Pending Publication Date: 2020-12-04
BOREALIS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Poor dispersibility of the resulting resin

Method used

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  • Polypropylene-ultrahigh-molecular-weight-polyethylene composition
  • Polypropylene-ultrahigh-molecular-weight-polyethylene composition
  • Polypropylene-ultrahigh-molecular-weight-polyethylene composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0277] The examples were carried out on a pilot scale. A three-reactor process setup was used in which the first reactor was a loop reactor and the second and third reactors were gas phase reactors.

[0278] The catalyst abbreviated "SSC" used in the inventive examples (metallocene complex MC1 with methylaluminoxane (MAO) and borate (cocatalyst system ), leading to catalyst 3) described in WO 2015 / 011135 A1, provided that the surfactant is 2,3,3,3-tetrafluoro-2-(1,1,2,2,3,3,3-hepta Fluoropropoxy)-1-propanol. The metallocene complex (MC1 in WO 2015 / 011135 A1) was prepared as described in WO 2013 / 007650 A1 (Metallocene E2 in WO 2013 / 007650 A1).

[0279] The comparative examples used a two reactor system. For Comparative Example 1, 15% by weight of LLDPE material produced with a single site catalyst was introduced in the granulation.

[0280] Table 1. Examples

[0281]

[0282]

[0283]

[0284]

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Abstract

PP / UHMW-PE (Polypropylene-Ultrahigh-Molecular-Weight-Polyethylene) composition having: a melting temperature Tm in the range of 125 to 150 DEG C (DSC, ISO 11357, Part 3), an MFR2 of 0.15 to 0.60 g / 10min (2.16kg, 230 DEG C, IS01133), units derived from 1-hexene in an amount of at least 1.80 wt.-%, and a XS according to IS016152 of less than 5.0 wt.-% all weight percentages with respect to the totalPP / UHMW-PE composition.

Description

technical field [0001] The present invention relates to polypropylene compositions especially suitable for pipe applications. The invention further relates to compositions produced by single site catalysts as well as by multi-step polymerization processes. Background technique [0002] The production of UHMW PE (Ultra High Molecular Weight Polyethylene) products (MW>1000000g / mol) is very challenging and severely limited in practice due to poor process operability. Due to the large difference in material properties, it is not feasible to add UHMW PE material for compounding. The resulting resin had poor dispersibility. It is presumed that dispersion requires a broad molecular weight distribution of the carrier polypropylene polymer. [0003] Little is known about PP / UHMW-PE (polypropylene-ultrahigh molecular weight-polyethylene) compositions. WO99 / 15586 discloses a polyolefin composition comprising 10 to 95% by weight of a crystalline propylene polymer (A) and 5 to 90%...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/06C08L23/14C08F2/00
CPCC08F4/65908C08F4/65912C08L23/142C08L2203/18C08L2205/025C08L2314/06C08F210/06C08F2/001C08F4/65927C08L23/06C08F110/02C08F210/14C08F2500/12C08L2207/068C08F2/01C08F210/02C08L23/16
Inventor P·莱斯基宁王静波M·加莱特纳K·贝恩赖特纳
Owner BOREALIS AG