Flame Retardant Polymeric Composition for Wire and Cable
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Solution Overview
Problem
Existing halogenated flame retardant compositions for wire and cable applications require high loadings of flame retardants, which adversely affect processability and mechanical performance, and fail to meet stringent burn rating standards like VW-1 and horizontal burn tests.
Innovation Solution
A composition comprising silanol functionalized polyolefin, anhydride-free brominated flame retardant, and antimony trioxide, with a specific antimony to bromine molar ratio of 0.37 to 0.95, which reduces the need for high flame retardant loadings while enhancing flame retardant performance, allowing the composition to pass the VW-1 and horizontal burn tests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high loadings of flame retardants are used to achieve sufficient flame retardancy, then flame retardant performance is improved, but processability and mechanical performance deteriorate
Solution Approach 1:
The patent changes the chemical parameters of the flame retardant system by using anhydride-free brominated flame retardants with specific molecular structures and controlling the Sb:Br molar ratio within 0.39-0.95. This parameter optimization allows achieving flame retardancy with lower loadings (10-30 wt%) compared to conventional formulations, thereby improving processability while maintaining flame safety
Solution Approach 2:
The patent creates a composite flame retardant system combining anhydride-free brominated flame retardants with antimony trioxide in specific ratios. This composite approach synergistically enhances flame retardant efficiency, allowing reduced overall loading while meeting VW-1 and horizontal burn test requirements, thus resolving the contradiction between flame safety and processability
2Reliability
If high loadings of flame retardants are used to achieve sufficient flame retardancy, then flame retardant performance is improved, but mechanical performance deteriorates
Solution Approach 1:
The patent optimizes the chemical composition parameters by selecting anhydride-free brominated flame retardants and controlling the Sb:Br molar ratio, enabling effective flame retardancy at 10-30 wt% loading. This reduced loading preserves the polymer matrix integrity, maintaining elongation and impact strength while achieving required flame safety standards
Solution Approach 2:
The synergistic composite system of anhydride-free brominated flame retardants and antimony trioxide achieves enhanced flame retardant efficiency at lower loadings, preventing the degradation of mechanical properties that would occur with high flame retardant content, thus simultaneously achieving flame safety and mechanical performance
3Reliability
If conventional flame retardant formulations are used to meet burn rating standards, then flame retardant performance is improved, but flame retardant loading increases
Solution Approach 1:
The patent changes the formulation parameters by using anhydride-free brominated flame retardants with specific molecular structures and optimizing the Sb:Br molar ratio to 0.39-0.95. This enables achieving VW-1 and horizontal burn test compliance with reduced flame retardant loadings of 10-30 wt%, compared to conventional higher loadings
Solution Approach 2:
The patent develops a composite flame retardant system combining anhydride-free brominated flame retardants with antimony trioxide in optimized ratios. This composite formulation achieves superior flame retardant efficiency, allowing compliance with stringent burn rating standards at lower overall flame retardant loadings, thus reducing the quantity of flame retardant substances required
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 improved flame retardant performance at lower flame retardant loadings, maintaining mechanical integrity and processability while successfully passing stringent burn tests, such as the VW-1 and horizontal burn tests.
Implementation Method 1
a silanol functionalized polyolefin
Data Source
AI summary
The present disclosure provides a composition. The composition includes a silanol functionalized polyolefin; an anhydride-free brominated flame retardant; antimony trioxide; and the composition has an antimony (Sb) to bromine (Br) molar ratio (Sb:Br molar ratio) from 0.37 to 1.05. 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 composition includes a silanol functionalized polyolefin; an anhydride-free brominated flame retardant; antimony trioxide; and the composition has an antimony (Sb) to bromine (Br) molar ratio (Sb:Br molar ratio) from 0.37 to 1.05.