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Hypercompressor lubricants for high pressure polyolefin production

A high-voltage polyolefin and ultra-high-voltage technology, applied in the field of high-voltage polyolefin, can solve problems such as cable dielectric loss and premature deterioration

Inactive Publication Date: 2010-08-11
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, in some applications, such as insulation sheaths for medium or high voltage power cables, the presence of polyhydric functional polyols can lead to dielectric loss and premature degradation of the cable

Method used

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  • Hypercompressor lubricants for high pressure polyolefin production
  • Hypercompressor lubricants for high pressure polyolefin production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] studied using UCON tm Premature crosslinking, or scorch behavior, of silane-polyolefin copolymers made with PE-320 and silane-polyethylene copolymers made with PE-305, which is a monohydroxyl lubricant. UCON tm PE-320 is a synthetic lubricant made from polyalkylene glycol-based stock polymers. UCON tm PE-320 is both dihydroxy functional and hydrophilic. PE-305 is a hydrophobic monohydroxyl lubricant made using propylene oxide and available from The Dow Chemical Company.

[0082] will increment the level of ucon tm Add PE-320 to DFDA-5451NT (ethylene trimethoxysilane copolymer). Catalyst masterbatch DGDA-1140 available from The Dow Chemical Company was additionally added, but any Lewis acid or Bronsted acid could be used as catalyst. DFDA-5451NT is a reactor made copolymer of ethylene and vinyltrimethoxysilane and is available from The Dow Chemical Company. As shown in the figure, when adding more UCON tm With PE-320, more crosslinking was observed, as indicated ...

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PUM

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Abstract

The high pressure manufacturing process for making a polyolefin is improved by using as a lubricant for the hypercompressors used in the process to assist in the generation of the high pressure a poiyeiher polyol comprising no more than one hydroxyl functionality.

Description

field of invention [0001] This invention relates to high pressure polyolefins. In one aspect, the invention relates to the production of high pressure polyolefins, while in another aspect the invention relates to lubricants for use in hypercompressors of high pressure polyolefin production processes. In a further aspect, the invention relates to products made from high voltage polyolefins, in particular powercable sheaths such as insulation or sheathing for powercables. Background of the invention [0002] In the production of high-pressure polyolefins such as high-pressure low-density polyethylene (HPLDPE), the typical operating pressure is 70 to 350 MPa (MPa, or about 10000 to 50000 psi), and the preferred operating pressure is 240 to 310 MPa (about 35000 to 45000psi). To achieve these high pressures, one or more ultra-high pressure compressors are employed, and the operation of such equipment requires the use of lubricants. Unfortunately, due to the high operating pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/00C08K5/05C08K5/06C08L23/00C10M145/26F04B53/18
CPCC10N2240/30F04B39/0215C08L23/06C10M107/34C08F210/16C10M2209/1033C10M111/04C10M2209/1055C10M2209/1085C10M2229/003C08F210/02C08L71/02C10N2040/30C08F2/00C08L2666/22C08F230/08C08F2500/08
Inventor 罗伯特·F·伊顿
Owner DOW GLOBAL TECH LLC