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Composition based on polypropylene compounds with styrenic based elastomers

A styrenic, elastic propylene technology, applied in the field of polymer compositions, can solve problems such as no treatment

Active Publication Date: 2013-06-19
BOREALIS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this invention does not address the question of how to maintain a high level of sealing performance after sterilization without giving up other good properties required in the art such as toughness and lower haze

Method used

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  • Composition based on polypropylene compounds with styrenic based elastomers
  • Composition based on polypropylene compounds with styrenic based elastomers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0103] test methods

[0104] 1. Mw, Mn, MWD

[0105] Mw / Mn / MWD is determined by gel permeation chromatography (GPC) according to the following method:

[0106] The weight average molecular weight Mw and the molecular weight distribution (MWD=Mw / Mn, where Mn is the number average molecular weight and Mw is the weight average molecular weight) are determined by a method based on ISO 16014-1:2003 and ISO 16014-4:2003. A Waters Alliance GPCV 2000 equipment equipped with a refractive index detector and an online viscometer was used with 3 TosoHaas TSK-gel columns (GMHXL-HT), and 1,2,4-trichlorobenzene (TCB, with 200mg / L of 2,6-di-tert-butyl-4-methyl-phenol stabilized) was used as a solvent, and 216.5 μL of sample solution was injected at a constant flow rate of 1 mL / min at 145 °C for each analysis. The column set was calibrated using 19 polystyrene (PS) relative standards with narrow molecular weight distributions ranging from 0.5 kg / mol to 11500 kg / mol and a set of well charact...

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Abstract

Polymer composition comprising—a heterophasic propylene copolymer comprising a polypropylene matrix and an elastomeric propylene copolymer comprising at least one comonomer selected from the group consisting of ethylene and C4 to C20 α-olefin, and—a styrenic based elastomer(s) (B), wherein the styrene content in each styrenic based elastomer (B) is equal or below 15 wt.-%, and the total amount of the styrenic based elastomer(s) (B) based on the total amount of polymers present in the polymer composition is of 16.0 to 46.0 wt.-%.

Description

technical field [0001] The present invention relates to a polymer composition useful for the preparation of sterilizable containers such as retort pouches or medical packaging such as for intravenous solutions. Background technique [0002] There is a rising trend in the use of plastic containers in the food packaging industry, notably bags containing sterilized or pre-cooked foods. Retort pouches offer many advantages over rigid metal packaging such as faster cook / sterilize times, less shelf storage space, easier placement, improved food taste, and more. A typical bag has: a multi-layer structure with polyolefin such as polyethylene or polypropylene, adhesive, barrier layer and outer layer. It is desirable that the polyolefin material impart rigidity and high impact strength to the final packaging material. Furthermore, the polymer should comply with legal requirements regarding safety standards, such as FDA (US Food and Drug Administration) regulations regarding the hexa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/10B32B1/00
CPCC08L23/0815C08L53/025C08L23/08C08L23/142C08L51/06C08L51/006C08L2207/02C08L23/10Y10T428/1352C08F210/06C08L2666/24C08L2666/08C08L2666/04C08L2666/02C08F2/001C08F4/6492C08F210/16C08F2500/12C08F2500/17C08F4/651
Inventor 托尼娅·舍德尼希克里斯泰勒·格赖因迪特里希·格罗格尔
Owner BOREALIS AG
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