Triazine Voltage Stabilizer for Polyolefin Insulation

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Solution Overview

Problem

Conventional voltage stabilizing agents for polyolefin compositions in power cables have poor compatibility, limiting their ability to enhance electrical breakdown strength and reliability, especially under high electrical stress.

Innovation Solution

A polymeric composition comprising a polyolefin and a triazine-based voltage stabilizing agent, which improves electrical breakdown strength and compatibility with polyolefin, reducing treeing and maintaining crosslinking chemistry integrity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If conventional voltage stabilizing agents (such as polycyclic aromatics) are used in polyolefin compositions, then electrical breakdown strength of insulating layers is increased, but compatibility with polyolefin is poor

Engineering Contradiction:

Improveelectrical breakdown strengthVSAvoidcompatibility with polyolefin

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The patent changes the chemical structure parameter of the voltage stabilizing agent from conventional polycyclic aromatics to triazine derivatives with specific substituent groups (R1-R7 being hydrogen, hydrocarbyl, substituted hydrocarbyl, or hydroxyl groups). This structural modification improves compatibility with polyolefin while maintaining electrical breakdown strength enhancement capability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates a composite system where triazine-based voltage stabilizing agents are combined with polyolefin matrix. The specific molecular structure of the triazine agent (with adjustable R1-R7 groups) allows for optimized interaction with polyolefin chains, achieving both good compatibility and electrical performance improvement.

Inventive Principle:

Principle #40Composite materials

2Reliability

If voltage stabilizing agents are added to increase electrical breakdown strength, then reliability under high electrical stress is improved, but impact on crosslinking chemistry must be minimized

Engineering Contradiction:

Improveendurance to high electrical stressVSAvoidinterference with crosslinking chemistry

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The triazine-based voltage stabilizing agent exhibits selective functionality: it provides voltage stabilization and electrical breakdown strength enhancement in the insulating layer while remaining chemically inert regarding crosslinking processes. The specific molecular structure (R1-R7 substituents) creates local chemical environments that favor electrical stability without interfering with crosslinking chemistry.

Inventive Principle:

Principle #3Local quality

3Productivity

If polyethylene is used in insulating layer for heat transfer, then load-carrying capacity is improved, but electrical breakdown strength is limited

Engineering Contradiction:

Improveload-carrying capacityVSAvoidelectrical breakdown strength

Core Design Contradiction:

ProductivityVSStrength

Solution Approach 1:

The triazine-based voltage stabilizing agent acts as an intermediary substance added to polyethylene. It mediates between the thermal properties of polyethylene (which enable high load-carrying capacity) and the need for improved electrical breakdown strength. The agent disperses within the polyethylene matrix, providing electrical enhancement without compromising thermal performance.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS9040828B2Coated conductor with voltage stabilized inner layer

Publication Date: 2015.05.26 UNION CARBIDE CORP

AI summary

Disclosed are polymeric compositions with improved breakdown strength. The polymeric compositions contain a polyolefin and a voltage stabilizing agent. The voltage stabilizing agent contains a triazine. The triazine may include a substituent that enables keto-enol tautomerism, which provides the voltage stabilizing agent with additional energy dissipation capacity. The present polymeric compositions exhibit improved breakdown strength when applied as an insulating layer for power cable.