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Ethylene-propylene-diene interpolymer composition

A composition and interpolymer technology, applied in the field of ethylene-propylene-diene interpolymer composition, can solve the problems of affecting the dielectric properties of EPDM, affecting the service life of cables, and disadvantages

Active Publication Date: 2014-08-13
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polymerization residues and / or impurities are known to adversely affect the dielectric properties of EPDM and in turn adversely affect the service life of the cable

Method used

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  • Ethylene-propylene-diene interpolymer composition
  • Ethylene-propylene-diene interpolymer composition
  • Ethylene-propylene-diene interpolymer composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0070] 1. Comparative samples

[0071] Three kinds of Nordel TM A comparative sample of IP3722 was provided by The Dow Chemical Company. Nordel TM IP3722 was prepared using a constrained geometry catalyst and a perfluorinated tris(aryl)boron cocatalyst.

[0072] 2. Preparation Example

[0073] Three examples of compositions of the invention were prepared as follows. Ethylene, propylene, and ENB are produced in a solution polymerization process using two continuous mixed loop reactors operated in series. The catalyst is dimethyl[[2',2'''-[1,2-cyclohexanediylbis(methyleneoxy-κO)]bis[3-(9H-carbazol-9-yl) -5-methyl[1,1'-biphenyl]-2-oxocation-κO]](2-)]-zirconium, the cocatalyst is MMAO.

[0074] Ethylene was introduced into a mixture of solvent ISOPAR E (a mixture of C8-C10 saturated hydrocarbons available from ExxonMobil), propylene and 5-ethylidene-2-norbornene (ENB) to form the first reactor feed stream. Thus, the outlet of the first reactor feed stream is a mixture of ...

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Abstract

The present disclosure is directed to a composition and articles containing the composition. The composition includes an ethylene-propylene-diene interpolymer (EPDM) having a rheology ratio greater than 33. The EPDM also has a molecular weight distribution greater than 3.0. The composition has a dissipation factor less than or equal to 0.01 radians as measured in accordance with ASTM D150 (130 DEG C, 60 Hz).

Description

Background technique [0001] The term "ethylene-propylene-diene interpolymer" (or "EPDM") as used herein is a saturated interpolymer chain composed of units derived from ethylene, propylene, and diene. EPDM can be used in numerous applications such as insulation for wire and cable. Electricity companies are constantly in need of cables with a long service life (greater than 40 years). The dielectric properties of the cable insulation affect the service life of the cable. Polymerization residues and / or impurities are known to adversely affect the dielectric properties of EPDM, and correspondingly, the service life of the cable. [0002] The art therefore recognizes the need for EPDMs with improved dielectric properties. The art further recognizes the need to reduce polymerization residues in EPDM while maintaining the processability of EPDM for cable production. Contents of the invention [0003] The present disclosure provides compositions. In one embodiment, the composi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/18C08K3/00
CPCC08F210/02C08K3/00C08L23/083C08F210/18C08F4/64193C08F210/06C08F236/20C08F2500/17C08F2500/25
Inventor B.W.沃尔瑟S.宋P.J.卡罗尼亚L.傅
Owner DOW GLOBAL TECH LLC