Intumescent Char-Forming Polyol
Intumescent char-forming polyol is a specialized multi-hydroxyl compound designed as the carbon source in intumescent flame retardant (IFR) systems. When combined with an acid source (APP) and a blowing agent (melamine), it undergoes rapid esterification and foaming upon flame exposure, forming a thick, stable, insulating char barrier that protects the underlying substrate. It offers improved char yield and char integrity compared to conventional pentaerythritol.
Technical Specifications
| appearance | White to off-white powder |
| moisture content (%) | ≤1.0 |
| phosphorus content (%) | N/A |
| char yield at 600°C (%) | ≥30 |
| hydroxyl value (mgKOH/g) | 800–1100 |
Applications
- Intumescent fireproofing coatings for structural steel and timber
- Halogen-free flame retardant formulations for polypropylene and EVA
- IFR masterbatch for wire and cable insulation compounds
- Flame retardant polyurethane coatings and adhesives
- Expandable fire barrier sealants and joint fillers
Key Features
- High hydroxyl functionality creates dense cross-linked char network for superior fire barrier performance
- Improved char integrity versus pentaerythritol at elevated temperatures above 500°C
- Compatible with APP and melamine in standard IFR ratios for easy formulation
- Halogen-free and phosphorus-free carbon source allowing flexible FR system design
Send Inquiry
More in Fire Retardant Chemicals
Aluminum Diethylphosphinate (AlDEP / DEPAL)
225789-38-8
Aluminum Hydroxide (ATH) Flame Retardant
21645-51-2
Aluminum Phosphate (AlPO4) Ceramic Flame Retardant
7784-30-7
Ammonium Phosphate Monobasic (Flame Retardant Grade)
7722-76-1
Ammonium Polyphosphate (APP) Phase I
68333-79-9
Ammonium Polyphosphate (APP) Phase II
68333-79-9
Antimony Pentoxide (ATO) Nanoparticle Synergist
1314-60-9
Antimony Trioxide (Sb2O3) Flame Retardant Synergist
1309-64-4