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Phosphorus-nitrogen synergistic system enabling excellent flame retardancy without halogen compounds.
High thermal stability suitable for polyester processing temperatures up to 280 °C.
Low migration and blooming resistance ensuring long-term performance retention in finished parts.
Good compatibility with polyethylene terephthalate (PET) and polybutylene terephthalate (PBT) resins.
RoHS-compliant and REACH-registered, supporting global environmental and regulatory requirements.
Flame-retarded PET/PBT engineering plastics for electrical connectors and housings.
Automotive interior components requiring UL94 V-0 rating at 1.6 mm thickness.
Textile fibers and spunbond nonwovens used in transportation seating and upholstery.
3C electronics enclosures where low smoke density and zero corrosive gas emission are critical.
Industrial conveyor belts and timing belts demanding both mechanical strength and fire safety.
| Chemical Type | Organophosphorus-nitrogen compound |
| Product Form | Free-flowing white granules |
| Appearance | Off-white to light beige granules |
| Density (25 °C) | 1.45–1.55 g/cm³ |
| Melting Range | 240–260 °C |
| Decomposition Onset Temperature | ≥290 °C (TGA, 10 °C/min, N₂) |
| Moisture Content | ≤0.3 wt% (by Karl Fischer titration) |
| Primary Applications | PET/PBT-based engineering thermoplastics |
Q1: What types of polyester resins is Deflamer LFR-8004 compatible with?
A: Deflamer LFR-8004 is specifically engineered for use in unsaturated polyester (UP) resins and modified polyester systems, including those used in sheet molding compound (SMC), bulk molding compound (BMC), and gel coats. It demonstrates good compatibility and dispersion stability without adversely affecting resin viscosity or curing kinetics.
Q2: How does LFR-8004 achieve flame retardancy without halogens?
A: LFR-8004 operates primarily through an intumescent mechanism—promoting the formation of a thermally stable, carbon-rich char layer upon exposure to heat. This char acts as a physical barrier that insulates the underlying material, reduces fuel release, and limits oxygen diffusion, thereby suppressing flame propagation without releasing corrosive or toxic halogenated gases.
Q3: Does LFR-8004 affect mechanical properties or surface finish of cured polyester parts?
A: When incorporated at recommended dosage levels, LFR-8004 typically maintains good retention of tensile strength, flexural modulus, and impact resistance. It also supports excellent surface aesthetics—including gloss and smoothness—in finished parts, provided proper dispersion and formulation balance are achieved during compounding.
Q4: What is the typical dosage range for achieving UL 94 V-0 or equivalent performance?
A: Dosage depends on the specific polyester formulation, filler content, and part geometry—but LFR-8004 is generally effective at low concentrations, typically ranging from 0.1% to 2% by weight relative to the total resin system. Optimal loading should be determined empirically through small-scale flame testing and performance validation under end-use conditions.
Q5: Is LFR-8004 suitable for applications requiring compliance with RoHS or REACH?
A: Yes—LFR-8004 is formulated without restricted halogenated compounds, heavy metals, or substances of very high concern (SVHCs) listed under current REACH candidate lists. It is designed to support compliance with RoHS directives and evolving regulatory expectations for halogen-free flame-retarded polymer systems.
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