HOFNIL-37A: intumescent flame retardant for polyolefins
HOFNIL-37A is a halogen-free intumescent flame retardant additive made by SK Minerals & Additives Ltd., manufacturer in India. It works across polypropylene, polyethylene, thermoplastic elastomers, HIPS, ABS and synthetic rubbers, and in intumescent coatings, for compounders, cable makers and coating formulators.
- Type
- Intumescent, halogen free
- For
- PP, PE, TPE, HIPS, ABS
- Also for
- Intumescent coatings
- Pack
- 20 kg bag
How HOFNIL-37A works
HOFNIL-37A combines acid donors, carbon sources and gas generators. On exposure to heat they swell and form a porous char layer that insulates the polymer surface.
That char barrier impedes heat transfer, limits the generation of volatile fuel and slows flame propagation.
It was developed for easy processing: it is non-hygroscopic, has low water solubility and decomposes in a thermally stable way, so it is simple to handle and does not compromise flow or compounding stability.
We can also tailor flame retardant blends to your application, so they fit your polymer system with minimal changes to the formulation.
Key advantages
- Char-forming mechanism: a stable, expanded char insulates the substrate and delays flame.
- Higher thermal stability: a higher decomposition temperature than conventional APP systems, for a wider processing window.
- Reduced smoke and toxicity: the intumescent pathway limits harmful emissions compared with halogenated alternatives.
- Water resistance: low solubility keeps it intact in humid or wet conditions.
- Easy to integrate: blends into polymer matrices without drastic changes.
- Safe handling: non-hygroscopic, and the additive itself is not flammable.
Typical applications
Housings and enclosures
Injection moulding in PP, PE, TPE, TPV, HIPS and ABS.
Cable and wire insulation
For halogen-free, low-smoke requirements.
Profiles and films
Extruded profiles and films.
Coatings and sealants
Intumescent coatings that expand into protective char on metal or structural substrates.
Textiles and fibres
Fire-safe fabrics for mass transit, uniforms and upholstery.
Adhesives
Flame retardancy in adhesives and sealants without major rework.
Specification, packing and supply
Packing and supply
- Packing
- 20 kg BOPP laminated bag with polythene liner
- Shelf life
- 2 years from date of manufacturing
Documents
Download what is published, or ask for a technical data sheet (TDS) or safety data sheet (SDS) and we will send it by email.
Related products
From our flame retardant additives range.
HOFNIL-38C
Phosphorus-nitrogen system for PP and PE, UL 94 V-2.
Intumescent paint (IP)
HOFNIL-37A for paints that expand into protective char.
Polypropylene (PP), V-0
HOFNIL-312A: halogen-free V-0 for polypropylene.
Related reading
Tell us what you're making.
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