Scratch-Whitening Resistant Flame-Retardant TPE-E Composition
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Solution Overview
Problem
Intumescent flame retardants used in thermoplastic polyester elastomers provide superior flame retardant properties but have poor compatibility and exhibit scratch-whitening issues, leading to easily scratched and damaged cables.
Innovation Solution
A halogen-free, flame-retardant composition comprising a thermoplastic polyester elastomer, a low-melting phosphorus-based flame retardant, and a blend of phosphorus-based and nitrogen-based solid intumescent flame retardants, which enhances scratch-whitening resistance and mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If intumescent flame retardants are used in thermoplastic polyester elastomers, then flame retardant properties are improved, but scratch resistance deteriorates
Solution Approach 1:
The patent uses a composite flame retardant system combining intumescent flame retardants with a low-melting-point phosphorus-based compound (melting point 50-150°C). This composite approach allows the intumescent retardants to provide flame protection while the low-melting phosphorus compound migrates to the surface to maintain scratch resistance by plasticizing and柔化 the surface layer.
Solution Approach 2:
The patent changes the physical state and melting characteristics of the phosphorus-based flame retardant component. By selecting phosphorus compounds with specific melting points (50-150°C), the system enables these compounds to melt and migrate under processing and use conditions, dynamically adjusting their distribution to balance flame retardancy and scratch resistance properties.
2Reliability
If intumescent flame retardants are used in thermoplastic polyester elastomers, then flame retardant properties are improved, but compatibility deteriorates
Solution Approach 1:
The low-melting-point phosphorus-based compound acts as an intermediary substance between the intumescent flame retardants and the thermoplastic polyester elastomer matrix. It facilitates compatibility by forming a compatible interface layer that allows the intumescent retardants to disperse uniformly while maintaining the polymer's structural integrity and processing characteristics.
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 significantly improves scratch-whitening resistance and maintains excellent flame retardant and mechanical properties, making it suitable for cable and wire applications, passing stringent flame tests like the UL-44 VW-1 rating.
Implementation Method 1
a low-melting, phosphorus-based flame retardant having a melting temperature no higher than 150 °C
Implementation Method 2
the low-melting phosphorus-based flame retardant acts as a plasticizer and improves the compatibility
Implementation Method 3
the low-melting phosphorus-based flame retardant acts as a plasticizer and improves the compatibility
Implementation Method 4
a blend of solid intumescent flame retardants comprising a phosphorus-based, organic salt flame retardant and a nitrogen-based organic flame retardant
Implementation Method 5
passing stringent flame tests like the UL-44 VW-1 rating
Data Source
AI summary
Halogen-free, flame-retardant thermoplastic polyester elastomer (TPE-E) compositions that include at least one thermoplastic polyester elastomer, at least one low-melting, phosphorus-based flame retardant having a melting temperature no higher than 150?, and a blend of solid intumescent flame retardants comprising a phosphorus-based, organic salt flame retardant and a nitrogen-based organic flame retardant are provided. The presence of the low-melting, phosphorus-based flame retardant renders the compositions more resistant to scratch-whitening.