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Solid crosslinked polyolefin compositions for wire and cable coating

A technology for cross-linked polymers and compositions, applied in the field of solid cross-linked polyolefin compositions for coating of wires and cables

Pending Publication Date: 2021-07-23
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many moisture-curable polyolefins exhibit viscosity profiles that lead to limited processability (e.g., onset of melt fracture), and poor surface smoothness at extrusion line speeds above 300 meters per minute

Method used

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  • Solid crosslinked polyolefin compositions for wire and cable coating
  • Solid crosslinked polyolefin compositions for wire and cable coating
  • Solid crosslinked polyolefin compositions for wire and cable coating

Examples

Experimental program
Comparison scheme
Effect test

example

[0139] The starting materials used in the inventive examples ("IE") and comparative samples ("CS") are detailed in Table 1 below.

[0140] Table 1

[0141]

[0142] According to the formulation listed in Table 2, the raw materials listed in Table 1 are used for the preparation of coated conductor samples for inventive examples IE-1, IE-2, IE-3, IE-4, IE-5 and comparative samples Polymer compositions of CS-1 and CS-2.

[0143] Coated conductor samples were prepared from tinned 7-strand 24 American Wire Gauge (AWG) cores. The combination of components is first dry blended. The compositions were then melt blended by extrusion blending with a 2.5 inch DAVIS STANDARD extruder having a 22:1 L / D and equipped with a polyethylene screw with twin flight mixing sections. The melt blended composition was extruded onto the conductor as the conductor was drawn through the extruder die at a line speed of 548 meters per minute. The temperature profile of the extruder ranged from 150°C ...

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Abstract

The present disclosure provides a composition. In an embodiment, a crosslinked polymeric composition is provided and comprises (A) from 4 wt% to 45 wt% of a thermoplastic polymer, (B) from 52 wt% to 95 wt% of a moisture-curable polyolefin, and (C) from 0.05 wt% to 7 wt% of a moisture condensation catalyst. The present disclosure provides an article. In an embodiment, a coated conductor is provided and comprises a conductor, and a coating on the conductor. The coating comprises a crosslinked polymeric composition comprising (A) from 4 wt% to 45 wt% of a thermoplastic polymer, (B) from 52 wt% to 95 wt% of a moisture-curable polyolefin, and (C) from 0.05 wt% to 7 wt% of a moisture condensation catalyst.

Description

Background technique [0001] Improving the rheological or melt flow properties of polyolefin resins is important for wire and cable applications to meet the increasing demand for improved processability in various cable constructions. The continuing trend in twisted pair category data cables calls for the increased use of low voltage signals to power devices over data cables (Power over Ethernet or PoE), resulting in higher operating temperatures for the cables. The potential for softening of cable insulation due to high temperatures raises concerns about the ability of thermoplastic solid or foam insulation to withstand the compressive stresses experienced over the decades of cable life. For example, the temperature limitations of conventional thermoplastic materials limit the application of PoE class data cables to about 100 watts. Cross-linked solid (non-foamed) or foamed insulation can provide a better alternative for PoE category data cable applications. [0002] Moistur...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08
CPCC08L23/06C08L2203/202C08L2207/062C08K3/011C08L23/0892C08L23/00C08L2205/025C08L2207/066C08L2312/08H01B3/441
Inventor P·J·布里格兰迪K·A·博尔兹三世M·埃斯吉尔M·E·桑德斯
Owner DOW GLOBAL TECH LLC