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Halogen-free formulation ensuring low smoke density and minimal toxic gas emission during combustion.
Excellent thermal stability, maintaining performance up to 300 °C without significant decomposition.
High phosphorus content enabling efficient char formation and condensed-phase flame inhibition.
Good compatibility with engineering thermoplastics including polyamide (PA6, PA66) and polybutylene terephthalate (PBT).
Low volatility and negligible migration, supporting long-term flame-retardant efficacy in end-use parts.
Electrical and electronic components requiring UL94 V-0 rating at thin-wall sections (e.g., connectors, switches, housings).
Automotive interior parts such as dashboard modules, junction boxes, and sensor enclosures.
Industrial control systems and power distribution units exposed to elevated ambient temperatures.
LED lighting housings and heat-dissipating fixtures where halogen-free compliance is mandated.
3C consumer electronics casings including power adapters, charging stations, and smart home devices.
| Chemical Type | Organophosphorus compound (phosphinate-based) |
| Product Form | White to off-white free-flowing powder |
| Appearance | Fine, homogeneous granular powder |
| Phosphorus Content (wt%) | ≥ 28.5% |
| Moisture Content (wt%, max) | 0.3% |
| Particle Size (D90, μm) | ≤ 35 |
| Thermal Decomposition Onset (TGA, N₂, °C) | ≥ 290 |
| Key Regulatory Compliance | RoHS 2015/863/EU compliant; REACH SVHC-free |
Q1: What types of polymers is CR-741 compatible with?
A: CR-741 is primarily formulated for use in thermoplastic resins including polyolefins (e.g., PP and PE), ABS, and certain engineering plastics. It demonstrates good dispersion and thermal stability during standard melt-processing conditions.
Q2: How does CR-741 achieve flame retardancy?
A: CR-741 functions through a synergistic combination of condensed-phase action—promoting char formation—and gas-phase radical quenching. Its chemical design helps reduce heat release rate and suppress flame propagation without relying on halogenated chemistry.
Q3: Is CR-741 suitable for applications requiring low smoke and low toxicity?
A: Yes—CR-741 is a non-halogenated, phosphorus-based flame retardant engineered to minimize smoke density and corrosive gas generation during combustion, supporting compliance with stringent fire safety expectations in enclosed or public-space applications.
Q4: What is the typical dosage range for effective flame retardancy?
A: Effective performance is generally achieved at low to moderate loadings, typically ranging from 0.1% to 2% by weight depending on the base polymer, desired flame rating (e.g., UL 94 V-0), and presence of other additives. Optimization requires formulation-specific testing.
Q5: Does CR-741 affect mechanical properties or processability?
A: When properly dispersed and dosed within recommended ranges, CR-741 exhibits minimal impact on tensile strength, impact resistance, or melt flow behavior. It is designed to preserve key mechanical performance while delivering reliable flame retardancy.
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