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Halogen-free, environmentally compliant formulation meeting RoHS and REACH requirements.
Excellent thermal stability up to 300 °C, supporting high-temperature processing of engineering plastics.
Low smoke density and reduced toxic gas emission during combustion, enhancing fire safety.
Good compatibility with polyolefins, polyesters, and thermoplastic elastomers without compromising mechanical properties.
Easy dispersion and excellent migration resistance in finished compounds.
Wire and cable insulation for low-smoke zero-halogen (LSZH) applications.
Flame-retarded automotive interior components including dashboards and trim parts.
Electrical enclosures and housings for consumer electronics and industrial equipment.
Fire-safe building materials such as ceiling tiles and wall panels.
Transportation interiors for rail and bus seating systems requiring stringent fire performance standards.
| Chemical Type | Organophosphorus-based flame retardant |
| Product Form | Free-flowing white granular powder |
| Appearance | White to off-white granules |
| Density (25 °C) | 1.45–1.55 g/cm³ |
| Melting Range | 280–310 °C |
| Moisture Content | ≤ 0.2 wt% |
| pH (1% aqueous suspension) | 6.5–7.5 |
| Key Compliance | RoHS 2015/863/EU, REACH SVHC-free, UL 94 V-0 (at recommended loading) |
Q1: What types of polymers is SR 245 Flame Retardant compatible with?
A: SR 245 is primarily designed for use in thermoplastic elastomers (TPEs), polyolefins (e.g., PP and PE), and certain engineering plastics. It demonstrates good dispersion and stability during melt processing, though compatibility should be verified experimentally for each specific resin system and formulation.
Q2: How does SR 245 achieve flame retardancy without halogen-based chemistry?
A: SR 245 operates through an intumescent mechanism—promoting the formation of a protective, insulating char layer upon exposure to heat or flame. This action reduces heat feedback and limits fuel release, enabling effective flame suppression while maintaining halogen-free status.
Q3: Is SR 245 suitable for applications requiring regulatory compliance for low smoke and low toxicity?
A: Yes—SR 245 is formulated to support reduced smoke generation and lower toxic gas emissions during combustion, aligning with performance expectations for halogen-free flame retardants in cables, transportation interiors, and building materials where fire safety regulations emphasize smoke density and effluent toxicity.
Q4: Does SR 245 affect mechanical or processing properties of the final compound?
A: When properly incorporated and dispersed, SR 245 typically preserves key mechanical properties such as tensile strength and elongation at break. Minor adjustments to processing parameters (e.g., screw speed or temperature profile) may be needed to optimize melt homogeneity, especially at higher loadings.
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