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High flow heterophasic polypropylene copolymers with improved mechanical and optical properties

A technology of heterophasic polypropylene and propylene copolymer, which is applied in the field of injection molded articles and heterogeneous polypropylene compositions, and can solve the problems of unsuitable highly transparent packaging, etc.

Active Publication Date: 2019-06-14
BOREALIS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the claimed composition is not suitable for application on highly transparent packaging

Method used

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  • High flow heterophasic polypropylene copolymers with improved mechanical and optical properties
  • High flow heterophasic polypropylene copolymers with improved mechanical and optical properties
  • High flow heterophasic polypropylene copolymers with improved mechanical and optical properties

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0278] Measurement methods

[0279] The melt flow rate

[0280] Melt flow rate (MFR) is determined according to ISO 1133 and expressed in g / 10 min. MFR indicates the flowability and thus processability of a polymer. The higher the melt flow rate, the lower the viscosity of the polymer. For polypropylene, the MFR of polypropylene is determined at a temperature of 230 °C and a load of 2.16 kg 2 And for polyethylene, it was measured at 190°C.

[0281] In the case of, for example, sequential polymerization, when, for example, polymer resin (b) is produced in the presence of polymer resin (a), the MFR of polymer resin (b) can be calculated using the formula given here:

[0282] log MFR 最终 =w.log(MFR a )+(1-w).log(MFR b )

[0283] in

[0284] MFR 最终 denotes the MFR of a blend consisting of polymer resins (a) and (b),

[0285] MFR a represents the MFR of the polymer resin (a),

[0286] MFR b represents the MFR of the polymer resin (b),

[0287] w represents the relative ...

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Abstract

The present invention is directed to a new heterophasic polypropylene composition showing a good balance between stiffness and impact at low haze, as well as to its use for injection molded articles.The present invention is also directed to provide such heterophasic polypropylene composition in a more simplified mode of production.

Description

technical field [0001] The present invention relates to a new heterophasic polypropylene copolymer composition which exhibits a good balance between stiffness and impact at low haze, and to its use for injection molded articles and to finished items. [0002] The present invention also relates to providing such heterophasic polypropylene compositions in a simplified mode of production. Background technique [0003] Heterophasic polypropylene copolymers are widely used in injection molding processes. Such items are very common in the packaging industry, for example in thin-wall packaging or injection stretch blow molding (ISBM) applications. [0004] For these applications, there is a constant industry requirement to have available products that simultaneously exhibit better stiffness, better optical properties, and better impact properties: [0005] Polymers with higher stiffness can be transformed into items with lower wall thickness, saving material and energy. [0006...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08F2/00
CPCC08L23/12C08L2205/025C08L2205/035C08L2207/02C08F210/06C08F2810/10C08L23/16C08K5/1575C08F2/001C08F10/06C08F4/6546C08F4/6465C08F210/16C08F2500/12C08F2500/17C08F2500/20C08F2500/34C08F2500/33C08F2500/35C08F2500/27B29C45/0001C08L23/08C08L23/14C08L2205/03C08L2314/02
Inventor 马库斯·加尔艾特纳王静波E·波特
Owner BOREALIS AG
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