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Propylene polymer composition having superior hexane extractables/impact balance

A technology of propylene copolymer and composition, applied in the field of preparing said copolymer, can solve the problem of high content of hexane extractables

Active Publication Date: 2013-02-27
BOREALIS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although the composition according to WO 2010040492 exhibits good impact properties, it has a relatively high content of hexane extractables

Method used

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  • Propylene polymer composition having superior hexane extractables/impact balance
  • Propylene polymer composition having superior hexane extractables/impact balance
  • Propylene polymer composition having superior hexane extractables/impact balance

Examples

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example 1

[0171] Example 1 (invention) and comparative examples CE1, CE2, CE3, and CE4:

[0172] The base resin was prepared in a 211 autoclave. The catalyst used for polymerization is prepared according to WO 92 / 19653 with DOP as dialkyl phthalate of formula (I) with ethanol as alcohol, cocatalyst is triethylaluminum (TEA), using cyclohexylmethyl- Dimethoxysilane as external donor (D).

[0173] After the first prepolymerization step, the reactor was heated to 85 °C and filled with the required amount of C 3 and H 2 to initiate the bulk reaction conditions. by feed C 3 The pressure of the reactor was kept constant. After a specified bulk residence time, the reactor is flashed and the preparation of the homopolymer matrix continues using gas phase conditions. After a specified GP1 residence time, the reactor was flashed again. In the third stage, the elastomeric rubber dispersed phase is prepared by copolymerizing propylene and ethylene comonomers using specific gas phase conditio...

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Abstract

Heterophasic polypropylene copolymers having an MFR (2.16 kg, 230 DEG C) of 15 to 200 g / 10 min, determined according to ISO 1133 comprising a propylene homo- or copolymer matrix with an MFR (2.16 kg, 230 DEG C) of 80 to 500 g / 10 min, determined according to ISO 1133 (A) and an ethylene or C4-C10-alpha-olefin propylene rubber phase (B) dispersed within the matrix, wherein the heterophasic polypropylene resin has a fraction soluble in p-xylene at 25 DEG C (XCS), having an intrinsic viscosity of 2.85 to 4.00 dl / g, determined according to DIN EN ISO 1628-1 and -3 and being composed of propylene monomer units in an amount of 70 wt% to 90 wt%, with optimum balance of impact resistance and low amount of hexane extractables; a process for their preparation and their use.

Description

technical field [0001] The present invention relates to a heterophasic polypropylene copolymer having a balance of excellent impact properties and low hexane extractables content. Furthermore, the invention relates to a process for the preparation of said copolymer and its use. Background technique [0002] Heterophasic propylene copolymers find wide application in many fields such as molding applications, films, wires, cables or pipes due to their good stiffness / impact ratio and good flow properties. For example, heterophasic polymers are used in the production of automotive interiors and exteriors, especially dashboards, door cladding, consoles, trim, etc., as well as in the food and pharmaceutical packaging sector. [0003] A heterophasic polymer is a polymer that has a matrix phase and a dispersed phase. The matrix phase is usually a propylene homopolymer or copolymer phase and the dispersed phase is often a propylene copolymer comprising ethylene and / or other higher a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/10C08L23/16
CPCC09D123/12C09D119/00C08L23/16C08L23/10C08L19/00C08L23/12C08L2666/06C08F210/16C08F4/6492C08F4/6465C08F2/001C08F110/06C08F2500/12C08F210/06C08F2500/27C08F2500/30C08F2500/31C08F2500/35
Inventor 克劳斯·伯恩莱特佩塔尔·多舍弗格雷戈里·波特马蒂纳·桑德霍泽
Owner BOREALIS AG
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