Why It Matters
Passive fire-protection formulators buy the char-forming acid/carbon/blowing package (APP + pentaerythritol + melamine) plus flame-retardant fillers.
Solution Approach
Passive fire-protection formulators buy the char-forming acid/carbon/blowing package (APP + pentaerythritol + melamine) plus flame-retardant fillers. RawSource supplies the base chemicals that go into these programs. We can help with product selection, grade matching, and sourcing from multiple origins for supply security.
Typical Formulation Workflow
1
System & Substrate Assessment
Define the binder system (waterborne, solventborne, UV, powder), substrate, cure, and the VOC, durability, and appearance targets.
2
Additive & Resin Selection
Match resins, pigments and fillers, dispersants, rheology modifiers, defoamers, or biocides to the formulation and compatibility window.
3
Lab Let-Down & Optimization
Dial in loading and addition order through lab let-downs, checking dispersion, rheology, film properties, and storage stability.
4
Application & Performance Testing
Validate on the real application method and substrate, tracking gloss, adhesion, sag, cure, and weathering before scale-up.
Recommended Chemistries (5)
Ammonium Polyphosphate (APP)
CAS 68333-79-9
Acids & Salts
pH Adjustment
Acid source that, on heating, releases polyphosphoric acid which dehydrates the carbon source to build the insulating char
Full Details
Pentaerythritol
CAS 115-77-5
Glycols & Polyols
Conditioning
Polyhydric carbon source (carbonific) that reacts with the acid to form the expanded carbonaceous char foam
Physical Description: Colorless to white, crystalline, odorless powder Appearance: Colorless to white, crystalline powder Odor: Odorless
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Melamine (free)
CAS 108-78-1
Blowing agent (spumific) that decomposes to release inert gases, expanding the char into a low-density insulating foam
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Aluminum Hydroxide (ATH)
CAS 21645-51-2
Specialty Additives
Color / Pigmentation
Endothermic flame-retardant filler that releases water vapor on decomposition to cool the substrate and dilute combustion gases
Physical Description: White solid in various forms; White odorless gr… Appearance: Usually obtained in white, bulky, amorphous powder Melting Point: 300 °C
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Expandable graphite
CAS 7782-42-5
Intercalated graphite that exfoliates ('worms') on heating to form a physical insulating char barrier
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