Silane-Functionalized Polyolefin Coating for UV-Stable Cable Insulation
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Solution Overview
Problem
Conventional moisture-curable compositions for wires and cables exhibit unacceptably low wet electrical insulation resistance, inferior retained dielectric strength after impact, and poor long-term UV resistance due to the use of conventional hindered amine light stabilizers and halogen-free flame retardants.
Innovation Solution
A composition comprising a silane-functionalized polyolefin and a hindered amine light stabilizer (HALS) with a weight average molecular weight greater than 5,000 Dalton, which is halogen-free and does not include flame retardants, providing improved UV resistance, electrical insulation, and mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional hindered amine light stabilizers are used in moisture-curable compositions, then UV light stabilization is improved, but wet electrical insulation resistance deteriorates over time at elevated temperatures
Solution Approach 1:
The patent changes the molecular weight parameter of the HALS from conventional low molecular weight to high molecular weight (greater than 5,000 Dalton), which fundamentally alters the stabilizer's migration behavior and electrical properties, resolving the contradiction between UV stabilization and electrical insulation
Solution Approach 2:
The patent creates a composite system by combining high molecular weight HALS with silane-functionalized polyolefin and flame retardants, where the high molecular weight stabilizer acts as a non-migrating component that maintains electrical insulation while providing UV protection
2Object-affected harmful factors
If conventional hindered amine light stabilizers are used in coating compositions, then UV light stabilization is improved, but retained dielectric strength after glancing impact deteriorates
Solution Approach 1:
The patent changes the molecular weight parameter of the HALS to high molecular weight (greater than 5,000 Dalton), which prevents the stabilizer from acting as a plasticizer that would soften the coating and reduce dielectric strength upon impact
3Object-affected harmful factors
If conventional hindered amine light stabilizers are used in coating compositions, then UV light stabilization is improved, but long-term UV resistance deteriorates due to migration of the stabilizer
Solution Approach 1:
The patent changes the molecular weight parameter of the HALS to high molecular weight (greater than 5,000 Dalton), which fundamentally prevents migration by creating a polymer-like structure that is too large to move through the matrix, thereby enabling long-term UV resistance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition achieves enhanced wet electrical insulation resistance, retained dielectric strength, and long-term UV resistance, making it suitable for wire and cable applications while being halogen-free and free of flame retardants.
Implementation Method 1
moisture curable compositions containing a silane-functionalized polyolefin
Implementation Method 2
moisture curable compositions containing a silane-functionalized polyolefin
Data Source
AI summary
The present disclosure provides a composition. The composition includes a silane functionalized polyolefin; and a hindered amine light stabilizer (HALS) having a Mw greater than 5,000 Dalton. The present disclosure also provides a coated conductor. The coated conductor includes a conductor and a coating on the conductor, the coating including a composition. The coating composition includes a silane functionalized polyolefin; and a hindered amine light stabilizer (HALS) having a Mw greater than 5,000 Dalton.