PVC Article Composition for Fire Resistance Without Antimony
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Solution Overview
Problem
Polymeric materials used in construction, automotive, and outdoor applications have low fire resistance, necessitating the use of antimony compounds and heavy metal stabilizers, which are environmentally and safety concerns, and brominated flame retardants are banned in some applications.
Innovation Solution
A polyvinylchloride-based article comprising a polyvinylchloride resin, plasticizer, and antimony-free flame retardants like aluminum trihydrate or magnesium hydroxide, optionally with inorganic fillers, to achieve fire resistance without antimony compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antimony compounds and heavy metal stabilizers are used to improve fire resistance, then fire rating classification is achieved, but environmental and safety issues arise
Solution Approach 1:
The patent removes antimony compounds and heavy metal stabilizers from the PVC composition, extracting the harmful elements while maintaining fire resistance through alternative flame retardants (ammonium polyphosphate, melamine, or oligomeric/polymeric 1,3,5-triazine compounds) and heavy metal-free stabilizers
Solution Approach 2:
The patent changes the chemical composition parameters by substituting traditional flame retardants with halogen-free alternatives and using heavy metal-free stabilizer systems, thereby altering the material properties to achieve both fire resistance and environmental safety
2Reliability
If brominated flame retardants are used to achieve fire resistance, then fire rating requirements are met, but they are banned in some applications due to environmental concerns
Solution Approach 1:
The patent explicitly excludes brominated flame retardants and halogenated compounds from the composition, removing the problematic substance while achieving fire resistance through alternative mechanisms (intumescent flame retardants like ammonium polyphosphate and melamine)
Solution Approach 2:
The patent uses readily available, environmentally friendly flame retardant compounds that are widely accepted in various applications, ensuring broad adaptability and compatibility across different construction and automotive uses
3Ease of manufacture
If polymeric materials are used for construction applications, then ease of manufacture and installation are improved, but fire resistance properties deteriorate
Solution Approach 1:
The patent creates a composite PVC formulation combining the polymer matrix with multiple functional additives (flame retardants, stabilizers, lubricants, and processing aids) to achieve both ease of processing and fire resistance simultaneously
Solution Approach 2:
The patent modifies the chemical composition parameters of PVC by incorporating specific ratios of flame retardants and stabilizers, thereby changing the material's fire resistance properties while maintaining its processability and workability
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 PVC-based article meets fire resistance requirements without using antimony compounds, addressing environmental and safety issues while maintaining material performance.
Implementation Method 1
at least one antimony free flame retardant
Implementation Method 2
at least one antimony free flame retardant
Data Source
AI summary
The invention is directed to an article for use in roof detailing applications, tunnel applications, flooring applications, automotive applications, or outdoor applications, wherein the article comprises: a) a polyvinylchloride resin, b) at least one plasticizer for polyvinylchloride resin, c) optionally at least one inorganic filler, and d) at least one antimony free flame retardant.