1-Ethyl-3-methylimidazolium hexafluorophosphate

Catalog NumberACFR155371190

CAS Number155371-19-0

CategoryMain Flame-Retardant ILs

Synonyms	[emim][PF6]
Molecular Weight	256.13
Molecular Formula	C6H11F6N2P
SMILES	F[P-](F)(F)(F)(F)F.CCn1cc[n+](C)c1
InChI	1S/C6H11N2.F6P/c1-3-8-5-4-7(2)6-8;1-7(2,3,4,5)6/h4-6H,3H2,1-2H3;/q+1;-1
InChI Key	DPDAKOVGQUGTHH-UHFFFAOYSA-N
Melting Point	58-62 °C
Purity	≥97.0% (HPLC)
Appearance	solid
MDL Number	MFCD00216703
Size	5g/50g

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Case Study

1-Ethyl-3-methylimidazolium Hexafluorophosphate as a Synergistic Flame Retardant Catalyst for Thermoplastic Polyurethane

Chen, Xilei, et al. RSC advances 6.71 (2016): 67409-67417.

1-Ethyl-3-methylimidazolium hexafluorophosphate ([Emim]PF6) acts as a highly efficient catalytic/synergistic agent for aluminum hypophosphite (AHP) in flame-retardant thermoplastic polyurethane (TPU), significantly reducing heat and smoke release at an extremely low loading.
Composite Fabrication Process: TPU, AHP (19.9375 wt%) and [Emim]PF6 (0.0625 wt%) were melt-blended at 180 ± 5 °C for 10 min, then hot-pressed into sheets. Prior to use, AHP and TPU were dried at 80 °C for 12 h, while [Emim]PF6 was vacuum-dried at 80 °C for 3 days.
Performance Evaluation: The TPU/AHP/[Emim]PF6 composite achieved a UL 94 V-0 rating and an LOI of 35.75%, a 35.75% increase over neat TPU. Cone calorimetry showed that the peak heat release rate dropped by 91.65% compared to pure TPU, and total smoke release decreased by 53.75% at optimal loading. TG-IR revealed earlier release of non-flammable CO2 and H2O, reduced toxic aromatic volatiles, and improved char residue (41.71% at 700 °C). Excessive [Emim]PF6 (0.125 wt%) diminished performance.
Application Significance: [Emim]PF6 enables high-efficiency, low-loading flame retardancy for TPU, suitable for applications requiring fire safety and smoke suppression.

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