Phase II Halogen Free Fire Retardants CAS 68333-79-9 Avirulent Insipidity
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|Product Name||Halgen Free Flame Retardant Ammonium Polyphosphate Phase II For Intumescent Coating||Appearance||White Powder|
|Base||N And P Base||Environmentally||Friendly|
|Average Partical Size (D50)||15-25UM||Application||Intumscent Coating|
|Performance Characteristics||Avirulent Insipidity||Storage||In Dry And Cool Plac|
|Shelf Life||1 Year|
CAS 68333-79-9 Avirulent Insipidity,
Phase II halogen free fire retardants,
68333 79 9 halogen free fire retardants
Halgen Free Flame Retardant Ammonium Polyphosphate Phase II For Intumescent Coating
APP(ammonium polyphosphate) is mainly polymerized from monomeric diphosphorus pentaoxide(P2O5) and diammonium hydrogenorthophosphate(DAP)
APP is flame retardant using expansion mechanism.
APP decomposes ammonia gas and polyphosphoric acid at 275 ℃. Ammonia dilutes the oxygen concentration and at the same time expands and loosens the carbon layer to isolate heat.
APP is halogen free, environmental friendly.
Molecular formula : (NH4PO3)n n>1000
CAS No.: 68333-79-9
EINECS No.: 269-789-9
HS CODE: 2835.3990
Model No.: TF-201
Ammonium polyphosphate (Phase II) is a non-halogen flame retardant. It acts as a flame retardant by the intumescence mechanism. When APP-II is exposed to fire or heat, it decomposes to polymeric phosphate acid and ammonia. The polyphosphoric acid reacts with hydroxyl groups to form a nonstable phosphate ester. Following dehydration of the phosphate ester, a carbon foam is built upon the surface and acts as an insulation layer.
specifications of thickness of intumesncent vary depending on the substrate and steel profile.
- Factors influencing the specification
- Type of section(open/closed/cellular profile)
- Massivity of the steel(Hp/a)
- Exposure (i.e 3 sided ,4 sided exposure)
- Fire Rating FR(30/60/90/120 min)
- Critical temperature(CT)
|N Content (w/w)||≥14%|
|Decomposition Temperature (TGA, 99%)||＞275℃|
|Solubility (10% aq. , at 25ºC)||＜0.45%|
|pH value ( 10% aq. At 25ºC )||5.5-7.5|
|Viscosity (10% aq, at 25℃)||＜20 mpa.s|
|Average Partical size (D50)||15~25µm|
Basic concept of intumescent
- Intumenscent is a substance which swells as a result of heat exposure,thus increasing in volume,and decreasing in density.
- Expansion is nonrmally around 40-60 times that applied DFT.
- Char of low thermal conductivity that reduces heat transfer to substrate.
- Thermal insulation of substrate.
1. used to prepare many kinds of high-efficiency intumescent coating, the flameproof treatment for wood, multistory building, ships, trains, cables, etc.
2. used as the main flameproof additive for expanding-type flame retardant used in plastic, resin, rubber, etc.
3. make into powder extinguishing agent to be used in large-area outfire for the forest, oil field, and coalfield, etc.
4. In plastics(PP, PE, etc. ), Polyester, Rubber, and Expandable fireproof coatings.
5. used for textile coatings.
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