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Polyethylene compositions, and articles made therefrom

A composition, polyethylene technology, applied in the direction of coating, etc., can solve the problem of not being able to transport gravel water-based slurry

Pending Publication Date: 2019-04-26
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To provide another example where existing technology may not adequately handle contact with slurry or abrasive particulate material, HDPE pipe, pipe lining, pipe coating or pipe fittings may not be capable of transporting gritty water-based slurries such as mining slurries, petroleum base paste and / or solvent base paste

Method used

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  • Polyethylene compositions, and articles made therefrom

Examples

Experimental program
Comparison scheme
Effect test

example

[0097] The following compositions are used in the examples described below.

example 1

[0099] Ultra-high molecular weight polyethylene has a weight average molecular weight of 8,000,000g / mol, a density of 0.925g / cc, an intrinsic viscosity of 28dL / g, and an average particle size D50 of 150μm (UTEC TM 6541, available from Braskem (Brazil), and thermoplastic polyolefin elastomer (INFUSE TM 9010, density=0.877g / cc, melt index I2=0.5g / 10min, Mw / Mn of 2.6, available from The Dow Chemical Company in the United States) and blended at a weight ratio of 65:35 to form a composition. Then use a LabTech 26mm twin-screw compounder to combine the composition with 600ppm of fluoropolymer processing aid (melt flow index (265°C, 5kg) 10g / 10 minutes under the following processing parameters (Dynamar FX5911, available from United States 3M company (3M, Inc., USA))) mixing to produce uniform pellets:

[0100] Barrel temperature: 275℃ flat temperature curve

[0101] Mold temperature: 280℃ flat temperature curve

[0102] Screw RPM: 130; Torque: 80%; Melting temperature: 280°C.

[0103] Th...

example 2

[0105] Ultra-high molecular weight polyethylene has a weight average molecular weight of 8,000,000g / mol, a density of 0.925g / cc, an intrinsic viscosity of 28dL / g, and an average particle size D50 of 150μm (UTEC TM 6541, available from Brasco), and thermoplastic polyolefin elastomer (INFUSE TM 9010, density=0.877g / cc, melt index I2=0.5g / 10min, Mw / Mn is 2.6, it can be purchased from Dow Chemical Company in the United States and blended at a weight ratio of 55:45 to form a composition. Using a LabTech 26mm twin-screw compounder under the following processing parameters, the composition and 600ppm fluoropolymer processing aid (melt flow index (265°C, 5kg) of 10 g / 10 minutes (Dynamar FX5911, available from the United States) 3M company)) mixed to produce uniform pellets:

[0106] Barrel temperature: 275℃ flat temperature curve

[0107] Mold temperature: 280℃ flat temperature curve

[0108] Screw RPM: 130; Torque: 80%; Melting temperature: 280°C.

[0109] The characteristics of the com...

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Abstract

The invention provides ethylene-based composition comprising a blend of an ultra-high molecular weight polyethylene having an intrinsic viscosity from 5 to 50 deciliters / gram; a thermoplastic polyolefin elastomer having a density of from 0.850 to 0.910 g / cc; and, optionally, a fluoropolymer.

Description

Technical field [0001] The embodiments of the present disclosure generally relate to polyethylene compositions and the use of polyethylene compositions made into shaped articles, such as geomembranes, pipes or pipes, pipe coatings, pipe linings, pipe fittings, and environmental pool linings. Background technique [0002] Geomembranes, pipes, pipes, pipe coatings, pipe linings, or environmental tank linings made of polyolefin (eg, polyethylene resin) are relatively lightweight, easy to handle, and non-corrosive. Existing polyolefin materials can provide relatively high rigidity and relatively high flexibility, so that when forming geomembrane, pipeline, pipe, pipeline coating, pipeline lining or environmental pool lining, they can be suitable for the ground or the ground Used on. However, existing geomembranes, pipes, pipes, pipe coatings, pipe linings or environmental pool linings can withstand high levels of abrasion during installation and contact with slurry or other abrasive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06
CPCC08L2203/18C08L2205/03C08L2207/068C08L23/06C08L53/025C08L53/00C08L23/16C08L27/12C08L23/0815C08L2205/025C08L2207/04C09D123/06C09D123/16
Inventor D·常S·R·阿瑟瑞娅R·维沃斯
Owner DOW GLOBAL TECH LLC
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