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Soft copolymers with high impact strength

A technology of notched impact strength and copolymers, applied in thin-walled packaging containing heterophasic propylene copolymers, improving the toughness of injection molded products, and in the field of heterophasic propylene copolymers, it can solve problems such as product drop

Active Publication Date: 2021-01-15
BOREALIS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Further, the material also needs to be resistant to mechanical impact damage, which often occurs, for example, if the product is dropped

Method used

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  • Soft copolymers with high impact strength
  • Soft copolymers with high impact strength
  • Soft copolymers with high impact strength

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Experimental program
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preparation example Construction

[0263] Specific instructions for the preparation of the catalysts are disclosed in WO 2012 / 007430, EP2610271, EP 261027 and EP2610272, which are hereby incorporated by reference.

[0264] Ziegler-Natta catalysts (ZN-C) are preferably used in conjunction with an aluminum alkyl cocatalyst and an optional internal donor.

[0265] As a further component, in the polymerization process of the invention, an external donor (ED) is preferably present. Suitable external donors (ED) include certain silanes, ethers, esters, amines, ketones, heterocyclic compounds and mixtures thereof. Particular preference is given to using silanes. Most preferably silanes of the general formula are used:

[0266] R a p R b q Si(OR c ) (4-p-q)

[0267] Among them, R a , R b and R c Represents a hydrocarbon group, especially an alkyl or cycloalkyl group, wherein p and q are numbers ranging from 0 to 3, and their sum p+q is equal to or lower than 3. R a , R b and R c can be selected independ...

Embodiment

[0281] 1. Measurement method

[0282] Unless otherwise stated, the following definitions of terms and assay methods are applicable to the above overall description of the present invention and the following examples.

[0283] Calculation of the comonomer content of the second propylene copolymer fraction (R-PP2):

[0284]

[0285] in,

[0286] w(PP1) is the weight fraction [in % by weight] of the first propylene copolymer component (R-PP1),

[0287] w(PP2) is the weight fraction [in % by weight] of the second propylene copolymer component (R-PP2),

[0288]C(PP1) is the comonomer content [in mol%] of the first propylene copolymer fraction (R-PP1),

[0289] C(PP) is the comonomer content [in mol %] of the random propylene copolymer (R-PP),

[0290] C(PP2) is the calculated comonomer content [in mole %] of the second propylene copolymer fraction (R-PP2).

[0291] Calculation of the xylene cold soluble (XCS) content of the second propylene copolymer fraction (R-PP2):

[0...

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Abstract

The present invention is directed to a new heterophasic propylene copolymer (RAHECO) and an injection molded article comprising the heterophasic propylene copolymer (RAHECO) as well as a thin wall packaging comprising the heterophasic propylene copolymer (RAHECO). The present invention is further directed to the use of the heterophasic propylene copolymer (RAHECO) for improving the toughness of aninjection molded article.

Description

[0001] This application is a divisional application based on the following Chinese patent application: [0002] Application date of the original case: February 3, 2015 [0003] Original application number: 201580005776.5 (PCT / EP2015 / 052194) [0004] Title of original application: Flexible copolymer with high impact strength technical field [0005] The present invention relates to a novel heterophasic propylene copolymer (RAHECO) and an injection molded article comprising the heterophasic propylene copolymer (RAHECO), as well as thin-walled packaging comprising the heterophasic propylene copolymer (RAHECO). The present invention further relates to the use of the heterophasic propylene copolymer (RAHECO) for improving the toughness of injection molded articles. Background technique [0006] In the field of thin wall packaging, it is very important to have excellent flow materials with good mechanical properties (ie high tensile modulus and good impact strength). In order t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08F210/06C08F210/16
CPCC08L2205/025C08L2207/02C08L2308/00C08F210/06C08L23/16C08L2314/02C08L23/142C08F2/001C08F210/16C08F2500/12C08F2500/17C08F2500/26
Inventor 王静波P·莱斯基宁约翰娜·利亚马库斯·加莱特纳
Owner BOREALIS AG