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Halogen-free formulation for reduced smoke and toxic gas generation during combustion.
Excellent thermal stability suitable for processing temperatures up to 300 °C.
Good compatibility with polyolefins, engineering thermoplastics, and elastomers.
Low volatility and minimal migration, ensuring long-term flame-retardant performance.
Meets UL 94 V-0 rating at appropriate loading levels in selected polymer systems.
Flame-retarded polypropylene (PP) for automotive interior components.
Wire and cable jacketing compounds based on thermoplastic elastomers (TPE).
Electrical enclosures and housings made from polybutylene terephthalate (PBT).
Household appliance parts requiring UL 94 compliance and low-smoke performance.
3D printing filaments (e.g., flame-retarded PLA blends) for functional prototyping.
| Chemical Type | Organophosphorus compound (aromatic phosphate ester) |
| Product Form | Powder |
| Appearance | White to off-white free-flowing powder |
| Phosphorus Content (as P) | Approx. 11.5 wt% |
| Decomposition Onset Temperature | ≥ 280 °C (by TGA, 10 °C/min, N₂) |
| Bulk Density | 0.7–0.9 g/cm³ |
| pH (1% aqueous suspension) | 5.5–7.0 |
| Moisture Content | ≤ 0.3 wt% |
Q1: What types of polymers is PX-202 compatible with?
A: PX-202 is primarily designed for use in thermoplastic polyesters (e.g., PET, PBT), polyacrylates, and certain engineering thermoplastics. It demonstrates good compatibility and dispersion stability in these matrices without significant impact on melt viscosity or mechanical properties.
Q2: How does PX-202 achieve flame retardancy?
A: PX-202 functions primarily through condensed-phase action—promoting char formation and reducing fuel release during thermal decomposition. Its phosphorus-containing structure enhances thermal stability of the polymer matrix and helps suppress flame propagation without relying on halogenated chemistry.
Q3: Is PX-202 suitable for applications requiring low smoke and low toxicity emissions?
A: Yes—PX-202 is a non-halogenated, phosphorus-based additive that typically generates lower smoke density and reduced toxic gas emissions compared to brominated alternatives, making it appropriate for environments where fire safety and indoor air quality are critical considerations.
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., UL94 V-0), and overall formulation balance—including synergists like melamine derivatives or metal hydroxides.
Q5: Does PX-202 require special handling or processing conditions?
A: PX-202 is supplied as a free-flowing solid powder and can be incorporated using standard compounding methods such as dry blending followed by extrusion. It exhibits good thermal stability up to typical polymer processing temperatures and does not require pre-drying under normal ambient storage conditions.
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E-mail: wangxingqiang@ericwchem.com
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