Crosslinkable Polymeric Composition with HATATA Coagent
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Solution Overview
Problem
Medium, high, and extra-high voltage cables using crosslinked polymeric materials face challenges with undesirable byproducts from radical reactions between peroxide and polyethylene, requiring elevated temperature degassing, which is inefficient.
Innovation Solution
A crosslinkable polymeric composition comprising a thermoplastic ethylene-based polymer, an organic peroxide, and a crosslinking coagent N,N,N′,N′,N″,N″-hexaallyl-1,3,5-triazine-2,4,6-triamine (HATATA) is used, which reduces coagent migration and enhances curing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If radical reactions between peroxide and polyethylene are used for crosslinking, then crosslinked polymeric material is formed, but undesirable byproducts are generated requiring elevated temperature degassing
Solution Approach 1:
The patent introduces a crosslinking coagent (N,N,N′,N′,N″,N″-hexaallyl-1,3,5-triazine-2,4,6-triamine) as an intermediary substance that mediates the crosslinking reaction between peroxide and polyethylene. This coagent facilitates the formation of crosslinked structures while reducing the generation of undesirable volatile byproducts, thereby resolving the contradiction between crosslinking efficiency and harmful byproduct formation
Solution Approach 2:
The patent changes the chemical parameters of the crosslinking system by incorporating a specific crosslinking coagent with unique molecular structure (hexaallyl-1,3,5-triazine-2,4,6-triamine). This parameter change modifies the reaction pathway to reduce volatile decomposition while maintaining crosslinking effectiveness, addressing the contradiction between strength development and harmful byproduct generation
2Strength
If conventional crosslinking compositions are used, then crosslinking can be achieved, but coagent migration occurs reducing material performance
Solution Approach 1:
The patent creates a composite crosslinking system by combining peroxide, polyethylene, and a specifically designed crosslinking coagent (N,N,N′,N′,N″,N″-hexaallyl-1,3,5-triazine-2,4,6-triamine). This composite formulation enhances coagent compatibility and reduces migration while maintaining crosslinking capability, resolving the contradiction between crosslinking strength and compositional stability
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 exhibits superior resistance to coagent migration and improved curing performance, reducing volatile decomposition byproducts and enhancing the mechanical properties of crosslinked polymeric materials.
Implementation Method 1
The radical reactions between peroxide and polyethylene generate undesirable byproducts which must be removed by elevated temperature in a degassing chamber after crosslinking the polyethylene
Implementation Method 2
a crosslinking coagent comprising N,N,N′,N′,N″,N″-hexaallyl-1,3,5-triazine-2,4,6-triamine
Implementation Method 3
which must be removed by elevated temperature in a degassing chamber after crosslinking the polyethylene
Data Source
AI summary
Crosslinkable polymeric compositions comprising a thermoplastic, non-elastomer ethylene-based polymer, an organic peroxide, and a crosslinking coagent comprising N,N,N′,N′,N″,N″-hexaallyl-1,3,5-triazine-2,4,6-triamine. Such crosslinkable polymeric compositions and their crosslinked forms can be employed as polymeric layers in wire and cable applications, such as insulation in power cables.