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Random propylene copolymer for bottles with good optical properties and low hexane content

A propylene copolymer and random propylene technology, applied in the field of new soft propylene copolymer, can solve the problems of unqualified visual appearance of extrusion blow molded products

Active Publication Date: 2015-07-15
BOREALIS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, it has become clear that haze should not be the only value used to judge the quality of the optical properties of extrusion blow molded articles
For example, it has been recognized that even with relatively low haze values, the visual appearance of extrusion blow molded articles is still unacceptable

Method used

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  • Random propylene copolymer for bottles with good optical properties and low hexane content
  • Random propylene copolymer for bottles with good optical properties and low hexane content
  • Random propylene copolymer for bottles with good optical properties and low hexane content

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Embodiment

[0267] 1. Measurement method

[0268] Unless otherwise stated, the following definitions of terms and assay methods apply to the above general description of the invention as well as to the following examples.

[0269] Separately, the comonomer content of the second propylene copolymer fraction (R-PP2) is calculated:

[0270] C ( PP ) - w ( PP 1 ) × C ( PP 1 ) w ( PP 2 ) = C ( PP 2 ) - - - ( ...

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Abstract

Propylene copolymer having a melt flow rate MFR 2 (230 °C) in the range of more than 0.8 to below 2.5 g / 10min, a xylene cold soluble content (XCS) in the range of 25.0 to 35.0 wt.-%, a comonomer content in the range of more than 4.5 to 10.0 wt.-%, wherein further the xylene cold soluble (XCS) fraction of the propylene copolymer has comonomer content in the range of 12.0 to 22.0 wt.-% and the xylene cold insoluble (XCI) fraction of the propylene copolymer has a Mw / Mn of more than 4.9 to 10.0.

Description

technical field [0001] The present invention relates to a novel soft propylene copolymer and to extrusion blow molded articles comprising the novel soft propylene copolymer. Background technique [0002] Polymers are used more and more widely in applications with different requirements. At the same time, we are continuously seeking polymers tailored to meet the requirements of these applications. The requirement is challenging because many polymer properties are directly or indirectly interrelated. For example, multiphase systems are well known for their good impact properties. This heterophasic propylene copolymer comprises a matrix, which is a propylene homopolymer or a random propylene copolymer, in which is dispersed an elastomeric copolymer. Thus, the polypropylene matrix comprises (finely) dispersed inclusions which are not part of the matrix and said inclusions comprise the elastomeric copolymer. The term "inclusions" accordingly denotes that the matrix and inclus...

Claims

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Application Information

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IPC IPC(8): C08L23/14C08F2/00C08F210/06
CPCC08L23/142C08L23/14C08F210/06C08F210/16C08F2500/04C08F2500/12C08F2/001C08F4/6545C08F4/651Y10T428/1397C08F210/08
Inventor 马库斯·加莱特纳卡贾·克利姆克克劳斯·贝恩赖特马丁纳·桑德霍尔策尔
Owner BOREALIS AG