CAS 59447-57-3 Poly(Pentabromobenzyl Acrylate) PBT Replacement
Chemical Specifications and Molecular Formula of CAS 59447-57-3 Poly(pentabromobenzyl acrylate)
CAS 59447-57-3 identifies a specific polymeric flame retardant known chemically as poly(pentabromobenzyl acrylate). This brominated acrylate polymer is characterized by a repeating unit structure derived from pentabromobenzyl acrylate monomers. The molecular formula for the repeating unit is (C10H5Br5O2)x, yielding a molecular weight of approximately 556.67 g/mol per unit, though the final polymer molecular weight varies based on the degree of polymerization. This oligomeric nature is critical for distinguishing it from small-molecule halogenated additives, providing enhanced thermal stability and reduced migration potential in engineering thermoplastics.
Physical specifications for industrial-grade material typically dictate a white or off-white powder appearance. Quality control parameters focus on bromine content, thermal properties, and volatility. Standard specifications require a bromine content of ≥70%, ensuring high efficiency in flame suppression mechanisms. The melting point range is established between 190°C and 220°C, allowing compatibility with high-temperature processing windows typical of polyester and polyamide compounding. Volatile matter is strictly controlled, with limits set at ≤0.3% at 105°C to prevent void formation during extrusion or injection molding. NINGBO INNO PHARMCHEM CO.,LTD. maintains rigorous batch testing protocols to ensure these parameters meet strict manufacturing tolerances for consistent downstream performance.
Implementing Poly(pentabromobenzyl acrylate) as a High-Performance PBT Replacement
In the context of engineering thermoplastics, poly(pentabromobenzyl acrylate) serves as a robust solution for achieving UL94 V-0 ratings in Polybutylene Terephthalate (PBT) and Polyethylene Terephthalate (PET) systems. Unlike reactive flame retardants that chemically bond to the polymer chain, this additive functions as an incorporative flame retardant masterbatch component or direct additive. Its compatibility with glass fiber reinforcement is a key advantage, maintaining mechanical integrity where other additives might cause interfacial failure. The high bromine content allows for lower loading rates compared to non-halogenated alternatives, preserving the impact strength and tensile properties of the base resin.
Successful implementation requires precise compounding strategies. The additive is typically introduced during the extrusion phase alongside synergists such as antimony trioxide. The ratio of bromine to synergist must be optimized to maximize char formation and gas-phase radical scavenging without compromising the thermal stability of the PBT matrix. For R&D teams seeking specific processing parameters, loading rates, and synergist ratios, detailed technical documentation is available. Engineers should refer to the Poly(pentabromobenzyl acrylate) formulation guide for Pbt to access comprehensive data on dispersion techniques and property retention benchmarks. This ensures that the final compound meets both fire safety standards and mechanical performance requirements for automotive and electrical applications.
Comparative Analysis vs Phosphorus and Nitrogen Flame Retardant Systems in Engineering Thermoplastics
Selecting the appropriate flame retardant system involves balancing fire performance, mechanical properties, and cost. While phosphorus and nitrogen-based systems are marketed as halogen-free alternatives, they often require significantly higher loading levels to achieve equivalent UL94 ratings in PBT and nylon. This high loading can plasticize the matrix, reducing heat deflection temperature (HDT) and tensile strength. In contrast, the polymeric structure of CAS 59447-57-3 offers a high performance benchmark with minimal impact on the host polymer's physical properties.
The following table compares key technical parameters between polymeric brominated systems and generic phosphorus/nitrogen alternatives in engineering thermoplastics:
| Parameter | Poly(pentabromobenzyl acrylate) | Phosphorus/Nitrogen Systems | Small Molecule Brominated |
|---|---|---|---|
| Active Element Content | ≥70% Bromine | 20-30% Phosphorus | ≥70% Bromine |
| Typical Loading Rate (PBT) | 10-15% | 20-30% | 10-15% |
| Thermal Stability (Onset) | >300°C | 250-280°C | 280-300°C |
| Hydrolysis Resistance | Excellent | Moderate to Poor | Good |
| Migration/Blooming | Low (Polymeric) | Low | High |
| Impact on HDT | Minimal | Significant Reduction | Minimal |
As demonstrated in the data, the polymeric nature of this brominated acrylate polymer provides superior migration resistance compared to small molecule halogenated options, while avoiding the hydrolysis sensitivity often associated with phosphorus esters in humid environments. The lower loading rate preserves the crystallinity and mechanical strength of the PBT matrix, making it a preferred drop-in replacement for legacy halogenated systems where regulatory constraints allow.
Thermal Stability and Migration Resistance Data for Halogen Flame Retardant Applications
Thermal stability is a critical metric for flame retardants used in high-temperature engineering plastics. Poly(pentabromobenzyl acrylate) exhibits a decomposition onset temperature exceeding 300°C, which aligns well with the processing temperatures of PBT and nylon (typically 240°C to 260°C). This thermal stability margin prevents premature decomposition during extrusion, which can lead to equipment corrosion and discoloration of the final part. Thermogravimetric analysis (TGA) confirms that the polymer retains its mass integrity up to the processing threshold, ensuring consistent flame retardant efficacy throughout the manufacturing cycle.
Migration resistance is another decisive factor for long-term reliability, particularly in electrical connectors and automotive under-hood components. Small molecule additives are prone to blooming, where the additive migrates to the surface over time, causing aesthetic defects and reducing fire performance. The high molecular weight and polymeric backbone of CAS 59447-57-3 physically entrap the bromine within the matrix, significantly reducing migration potential. Quality verification involves GC-MS analysis to detect low molecular weight fractions; specifications typically limit these fractions to ensure long-term stability. This thermal stability additive profile ensures that the flame retardant performance remains consistent over the lifecycle of the component, without surface exudation that could interfere with electrical contacts or painting processes.
Supply Chain Verification and Catalog Inquiry for Poly(pentabromobenzyl acrylate)
Securing a reliable supply chain for specialized chemical additives requires verification of manufacturing capabilities and quality assurance systems. When sourcing poly(pentabromobenzyl acrylate), procurement managers must validate that the supplier can provide consistent batch-to-batch specifications, particularly regarding bromine content and particle size distribution. Consistency in particle size is essential for uniform dispersion during compounding, preventing agglomeration that could weaken the final product. NINGBO INNO PHARMCHEM CO.,LTD. offers verified supply channels for this high bromine polymer, ensuring that all shipments are accompanied by comprehensive technical data sheets and batch-specific analytical reports.
Standard packaging configurations typically include 25kg drums, designed to maintain product integrity during storage and transport. The material should be stored in a clean, dry, and cool environment, protected from direct sunlight and moisture to prevent clumping or hydrolysis. For organizations requiring large-scale volumes or specific customization, direct engagement with the manufacturer is necessary to confirm lead times and logistics. To view detailed product specifications and availability, please visit the Poly(pentabromobenzyl acrylate) high bromine polymer catalog page. This ensures access to the most current inventory status and technical support resources for your formulation projects.
Optimizing flame retardant performance in engineering thermoplastics requires precise material selection based on verified chemical data and processing requirements. By leveraging the thermal stability and low migration characteristics of polymeric brominated systems, manufacturers can achieve compliance with fire safety standards without compromising mechanical integrity. To request a batch-specific COA, SDS, or secure a bulk pricing quote, please contact our technical sales team.