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Polymer composition and article

A technology of polymers and compositions, applied in the fields of polyolefin compositions, cables and production cables, can solve problems such as problems of processability

Pending Publication Date: 2022-07-22
BOREALIS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the processability of PE based on SS catalysts is often problematic

Method used

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  • Polymer composition and article
  • Polymer composition and article
  • Polymer composition and article

Examples

Experimental program
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Effect test

Embodiment 1

[0250] Invention Embodiment 1 (IE1)

[0251] The volume is 50dm 3 The loop reactor was operated at a temperature of 70 °C and a pressure of 63 bar. Ethylene, 1-butene, propane diluent and hydrogen were added to the reactor so that the feed rate of ethylene was 1.0 kg / h, the feed rate of hydrogen was 5.0 g / h, and the feed rate of 1-butene was 80 g / h, the feed rate of propane was 50 kg / h. In addition, 11 g / h of the solid Ziegler polymerization catalyst component was introduced into the reactor together with the triethylaluminum cocatalyst so that the molar ratio of Al / Ti was about 15. The production rate is 1 kg / h.

[0252] The slurry stream is continuously drawn and directed to a volume of 150dm 3 and a loop reactor operating at a temperature of 85°C and a pressure of 61 bar. Additional ethylene, propane diluent, 1-butene comonomer and hydrogen were further added to the reactor such that the ethylene concentration in the fluid mixture was 4.5 mol%, the hydrogen to ethyle...

Embodiment 2 to 10

[0256] Invention Embodiments 2 to 10 (IE2 to IE10)

[0257] The procedure of Example 1 was followed except that the operating conditions in the loop reactor and the gas phase reactor were modified as shown in Table 1. IE10 was performed without adding carbon black in the extrusion step.

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Abstract

A polymer composition comprising: (A) a first polyolefin component wherein the first polyolefin component comprises, preferably consists of, a multimodal polyolefin polymer; (B) a second polyolefin component; (C) optionally a filler wherein the first polyolefin component (A) is present in an amount of 65% to 99% by weight based on the total polymer composition and the second polyolefin component (B) is present in an amount of 35% to 1% by weight based on the total polymer composition; and wherein the polymer composition has an SHI (1 / 100) of 6 to 25, a G '(5 kPa) of 3000 Pa or less, and an environmental stress crack resistance (ESCR) of 1500 h or more when measured according to IEC 60811-406: 2012 Program B (the reagent is a 10% solution in water (by volume)).

Description

technical field [0001] The present invention relates to a polymer composition comprising a first polyolefin component, a second polyolefin component and optionally a filler, to articles comprising the polyolefin composition, to the use of the polyolefin composition, to the A cable of a layer of the polymer composition and a method of producing the cable. Background technique [0002] Bimodal or multimodal polyolefins such as polyethylene have very good processing and mechanical properties. Linear multimodal polyethylene is used in a variety of applications. In particular such polymers are known, for example, as materials for the sheathing of eg cables. [0003] However, sometimes it is not possible to obtain the desired property profile using only a reactor for the production of linear multimodal polyethylene, and in terms of mechanical properties, such as for polymers used in cable layers (eg jacket layers), the polymers Not entirely satisfactory. [0004] For example l...

Claims

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Application Information

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IPC IPC(8): C08L23/08
CPCC08L23/0815C08L2205/025C08L2203/202C08L2207/20C08L2207/066C08L23/06
Inventor 露特·达默特扎里·埃里莱
Owner BOREALIS AG
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