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Propylene-based polymer with low ash content and process

A polymer, propylene technology, used in organic insulators, plastic/resin/wax insulators, electrical components, etc., can solve the problems of time-consuming, expensive cleaning, etc., and achieve the effect of high dielectric strength

Inactive Publication Date: 2014-04-30
WR GRACE & CO CONN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cleaning is expensive, time-consuming and requires additional processing resources

Method used

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  • Propylene-based polymer with low ash content and process
  • Propylene-based polymer with low ash content and process
  • Propylene-based polymer with low ash content and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0133] Examples 1-6 Procatalyst

[0134] Examples 1-6 were prepared using a SPAD-containing Ziegler-Natta procatalyst composition comprising titanium, magnesium, and 3-methyl-5-tert-butyl-1,2-phenylene dibenzoate electron donor.

[0135] Comparative sample 1 (CS1) procatalyst

[0136] CS1 uses SHAC TM 310 preparation, the SHAC TM 310 is a Ziegler-Natta procatalyst composition comprising titanium, magnesium and diisobutyl phthalate internal electron donor.

[0137] 2. Polymerization reaction

[0138] Polymerizations were performed in liquid propylene in a 1 gallon autoclave using separate injections. The external electron donors were n-propyltrimethoxysilane (NPTMS) and isopropyl myristate. After conditioning, the reactor was charged with 1375 g of propylene (Examples 5-6 used propylene and ethylene) and the required amount of hydrogen and heated to 62°C. A 0.27-M solution of triethylaluminum in isooctane, an appropriate amount of 5.0-wt% catalyst slurry in mineral oil, ...

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PUM

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Abstract

The present disclosure provides a process for producing a wash-free propylene-based polymer with low total ash content for use as dielectric film. The propylene-based polymer contains a substituted phenylene aromatic diester and is suitable as a dielectric material for electrical devices.

Description

Background technique [0001] The present disclosure provides a propylene-based polymer having a low total ash content, a method of producing the same, and an apparatus comprising the same. [0002] Catalyst residues adversely affect the performance of the dielectric polymer film. For example, conventional propylene-based polymers are typically washed prior to their use as dielectric materials in order to remove catalyst residues and reduce total ash content. However, cleaning is expensive, time consuming, and requires additional processing resources. [0003] Those skilled in the art recognize the need for propylene-based polymers with low total ash content for dielectric applications. Propylene-based polymers that have low total ash content and do not require a cleaning process but still exhibit acceptably low catalyst residue for use as dielectric materials are further desired. Contents of the invention [0004] The present disclosure provides a method. In one embodimen...

Claims

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Application Information

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IPC IPC(8): C08F10/06C08F4/651H01B3/00
CPCC08F4/00C08F210/06C08F10/06C08F110/06H01B3/30H01B3/441C08F2500/12C08F2500/26C08F210/16C08F4/651
Inventor C-J.周
Owner WR GRACE & CO CONN