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Polypropylene compositions for foam applications

A technology of polypropylene composition and propylene polymer, applied in the field of foamed products

Active Publication Date: 2021-10-22
BOREALIS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, finding the balance between maximum foaming and tool opening degrees and good mechanical properties is challenging

Method used

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  • Polypropylene compositions for foam applications
  • Polypropylene compositions for foam applications
  • Polypropylene compositions for foam applications

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Experimental program
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Embodiment

[0261] 1. Measurement method

[0262] Unless otherwise defined, the following definitions of terms and determination methods apply to the above general description of the invention and to the following examples.

[0263] Calculation of the comonomer content of the first elastomeric propylene copolymer fraction, i.e. the polymer produced in the second reactor (R2):

[0264]

[0265] in,

[0266] w(PP1) is the weight fraction [in % by weight] of the first propylene polymer fraction, i.e. the polymer produced in the first reactor (R1),

[0267] w(PP2) is the weight fraction [in % by weight] of the first elastomeric propylene copolymer fraction, i.e. the polymer produced in the second reactor (R2),

[0268] C(PP1) is the comonomer content [in mole %] of the first propylene polymer fraction, i.e. the polymer produced in the first reactor (R1),

[0269] C(PP) is the comonomer content of the first propylene polymer and the first elastomeric propylene copolymer fraction, i.e. th...

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Abstract

The present invention relates to a polypropylene composition (C) comprising a heterophasic propylene copolymer and an inorganic filler, the use of said polypropylene composition (C) for the production of foamed articles and foam products.

Description

technical field [0001] The present invention relates to a polypropylene composition (C) comprising a heterophasic propylene copolymer and an inorganic filler, to the use of said polypropylene composition (C) for the production of foamed articles and to foam products. Background technique [0002] One of the main challenges facing the automotive industry is reducing the weight of a car without losing its mechanical functionality. Since many parts of the car are made from advanced polypropylene materials, there is also a need to reduce the weight of these polymers. A major step in this direction has been to reduce the amount of fillers in polypropylene materials. Another way to reduce weight is to form a sandwich structure consisting of two dense skin layers and a foamed inner layer through the injection molding process. However, finding a balance between maximum foaming and tool opening degrees and good mechanical properties is challenging. Furthermore, the automotive ind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K7/14C08L23/16C08L51/06
CPCC08L23/12C08L2203/14C08L2205/035C08L2205/16C08L2207/02C08F210/06C08L23/16C08K7/14C08L51/06C08F4/6465C08F10/00C08F4/6492C08F2/001C08F110/06C08F2500/12C08F2500/35C08F210/16C08F2500/27C08F2500/17C08J9/0061C08L2205/025C08J2323/12C08J2423/16C08J2423/12C08J2423/14
Inventor 乔治·格雷斯登伯格苏珊娜·卡伦丹妮拉·米列瓦沃尔夫冈·斯托克雷特欧文·卡斯特纳约亨·卡斯尔
Owner BOREALIS AG