Halogen-Free Polypropylene Flame Retardant Composition
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Solution Overview
Problem
Current flame retardant solutions for polypropylene (PP) based polymer compositions face challenges such as toxicity from halogen-based products, poor moisture and weathering resistance, and high loading requirements for effective intumescent systems, which can compromise polymer properties and processability.
Innovation Solution
A polypropylene composition comprising more than 30 wt% of a PP polymer, 1 to 20 wt% of an inorganic derivative of Phosphorus as a flame retardant, 0.2 to 5 wt% of additives, 3 to 30 wt% of a plastomer, and optionally up to 45 wt% of further components, which provides excellent flame retardant behavior and maintains the integrity of the polymer composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If halogen-based flame retardants are used, then flame retardant performance is improved, but toxicity increases
Solution Approach 1:
The patent extracts and removes halogen-based flame retardants from the polymer composition, replacing them with halogen-free alternatives. This extraction eliminates the toxic harmful factors while maintaining the essential flame retardant function through alternative chemical compositions.
Solution Approach 2:
The patent changes the chemical composition parameters by transitioning from halogen-containing compounds to halogen-free flame retardant systems. This parameter change in the chemical structure eliminates toxicity while preserving flame retardant performance through different chemical mechanisms.
2Reliability
If intumescent flame retardant systems are used, then flame retardant performance is improved, but loading requirements increase
Solution Approach 1:
The patent optimizes the chemical composition parameters of the intumescent system, adjusting the ratios and types of flame retardant compounds to achieve effective flame protection at reduced loading levels. This allows maintaining performance while reducing the quantity of additive required.
Solution Approach 2:
The patent employs a composite flame retardant system combining multiple components (such as phosphorus compounds, nitrogen sources, and carbon formers) that work synergistically. This composite approach enhances flame retardant efficiency per unit mass, reducing overall loading requirements while maintaining or improving performance.
3Reliability
If flame retardant additives are increased, then flame retardant performance is improved, but polymer properties deteriorate
Solution Approach 1:
The patent optimizes the concentration parameters of flame retardant additives to achieve the minimum effective level required for flame protection. This parameter optimization ensures adequate flame retardancy while minimizing the negative impact on mechanical properties such as strength and flexibility.
Solution Approach 2:
The patent introduces master batches as intermediary carriers for flame retardant additives. These master batches provide controlled, uniform distribution of flame retardant compounds at optimized concentrations, preventing local agglomeration that would excessively degrade mechanical properties while ensuring effective flame protection.
4Reliability
If flame retardant additives are increased, then flame retardant performance is improved, but processability deteriorates
Solution Approach 1:
The patent uses master batches as intermediary carriers to deliver flame retardant additives. These pre-mixed master batches ensure uniform distribution at controlled concentrations, preventing processing issues such as poor flow or mold filling that would result from excessive or uneven additive loading.
Solution Approach 2:
The patent optimizes the concentration parameters of flame retardant additives to levels that maintain effective flame protection while preserving good processability. This involves finding the optimal balance point where sufficient flame retardancy is achieved without compromising melt flow or 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 achieves superior flame retardant performance, meeting UL94 Standard requirements and even reaching VTM-0 classification, while maintaining mechanical properties, water resistance, and thermal stability, making it suitable for various end applications, including photovoltaic modules.
Implementation Method 1
1 to 20 wt% of a flame retardant product comprising an inorganic derivative of phosphorus
Data Source
Figure 1
AI summary
The present invention relates to a polymer composition with flame retardant activity, to a use of the polymer composition for producing an article, to an article comprising the polymer composition, preferably to an article which comprises a layer element comprising at least one layer which comprises the polymer composition.