Polyethylene compositions and articles made therefrom

A kind of composition, polymer technology, applied in the field of polyethylene composition and products made therefrom

Active Publication Date: 2022-07-22
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing piping may not be sufficient to transport such slurries or other streams of abrasive particles at elevated temperatures such as over 60°C (140°F)

Method used

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  • Polyethylene compositions and articles made therefrom
  • Polyethylene compositions and articles made therefrom

Examples

Experimental program
Comparison scheme
Effect test

example

[0120] The following compositions were used in the examples described below.

example 1

[0122] Ultra-high molecular weight ethylene-based polymer (UTEC) with a weight average molecular weight of 8,000,000 g / mol, a density of 0.925 g / cc, an intrinsic viscosity of 28 dL / g, and an average particle size D50 of 150 μm TM 6541, available from Brasco, Brazil); polyethylene resin comprising a first molecular weight ethylene polymer component and a second molecular weight ethylene polymer component (DGDA-2420NT, density = 0.940 g / cc, high Load Melt Index I 21 =9.5g / 10min, melt index I2 of 0.15g / 10min, and Mw / Mn of 9, available from The Dow Chemical Company, USA); and thermoplastic polyolefin elastomer (INFUSE TM 9010, density = 0.877 g / cc, melt index I2 = 0.5 g / 10min, Mw / Mn of 2.6, available from The Dow Chemical Company, USA) was blended in a weight ratio of 50:15:35 to form a composition. The composition was mixed with 600 ppm of a fluoropolymer processing aid (melt flow index (265°C, 5 kg) of 10 g / 10 min (Dynamar) using a LabTech 26 mm twin screw compounder at the f...

example 2

[0128] Ultra-high molecular weight ethylene-based polymer (UTEC) with a weight average molecular weight of 8,000,000 g / mol, a density of 0.925 g / cc, an intrinsic viscosity of 28 dL / g, and an average particle size D50 of 150 μm TM 6541, available from Brasco, Brazil); polyethylene resin comprising a first molecular weight ethylene polymer component and a second molecular weight ethylene polymer component (DGDA-2420NT, density = 0.940 g / cc, high Load Melt Index I 21 =9.5g / 10min, melt index I2 is 0.15g / 10min, and Mw / Mn is 9, available from Dow Chemical Company, USA); and thermoplastic polyolefin elastomer (ENGAGE TM 7387, density=0.870 g / cc, melt index I2=0.5 g / 10min, available from The Dow Chemical Company, USA) was blended in a weight ratio of 50:15:35 to form a composition. The composition was mixed with 600 ppm of a fluoropolymer processing aid (melt flow index (265°C, 5 kg) of 10 g / 10 min (Dynamar FX5911, available from Available from 3M Company in the United States)) co...

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Abstract

The present invention provides a composition suitable for use in plumbing applications, the composition comprising: an ultra-high molecular weight ethylene-based polymer having an inherent viscosity of 5 to 50 deciliters / gram; a polyethylene resin comprising a first molecular weight ethylene-based polymer a polymer component and a second molecular weight ethylene-based polymer component, wherein the polyethylene resin has a density of 0.930 to 0.960 g / cc; a thermoplastic polyolefin elastomer has a density of 0.850 to 0.910 g / cc; and optionally of fluoropolymers.

Description

technical field [0001] Embodiments of the present disclosure generally relate to polyethylene compositions and the use of polyethylene compositions to form shaped articles, such as pipes. Background technique [0002] Pipes made from polyolefins such as PE resins are relatively lightweight, easy to handle and non-corrosive. Existing polyolefin pipes can provide relatively high stiffness so that they can be laid in the ground, and relatively high flexibility, so that they can adapt to the movement of the ground. However, existing piping used to convey the flow of slurry or other abrasive particles can be subject to high levels of wear. In some applications, existing piping may not be sufficient to handle the delivery of the slurry or abrasive particle stream. For example, HDPE pipes may not be able to transport water-based sandy slurries (eg, mineral slurries) or petroleum-based and / or solvent-based slurries. Therefore, these conveying applications may require the use of h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06
CPCC08L23/06C08L2203/18C08L2205/025C08L2205/03C08L2205/035C08L2207/068C08L23/16C08L23/04C08L53/00C08L53/025C08L23/0815C08L27/12C08L2207/062C08L2207/064
Inventor D·常S·R·阿瑟瑞娅R·维沃斯
Owner DOW GLOBAL TECH LLC
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