Securoc C10 and Securoc D10 products are different blends of two minerals: Huntite and Hydromagnesite
Huntite particles have a platy morphology and the particles are usually about 1 μm or less in diameter, much smaller than hydromagnesite particles. It has the following chemical formula and thermally decomposes between about 450°C and 750°C in two stages, releasing only carbon dioxide, leaving a solid residue of magnesium oxide and calcium oxide: Mg3Ca(CO3)4 → 3MgO + CaO + 4CO2
The solid residue is called “char” and is critical to obtain smoke suppression . Char coming from Huntite has better mechanical properties than char generated by the thermal decomposition of hydromagnesite (which only consists of MgO – see below).
Natural hydromagnesite particles have a “blocky” morphology and once processed the majority of the particles are usually between 1 and 10 μm in diameter depending on the processing.
It thermally decomposes between about 220°C and 550°C in two stages, initially releasing water then carbon dioxide, leaving a solid residue of magnesium oxide: Mg5(CO3)4(OH)2·4H2O → 5MgO + 4CO2 + 5H2O
Basic product (mineral blend) properties
|Hardness (Mohs)||2 – 3||2-3||[-]|
|Refractive index||1.61 – 1.64||1.61-1.64||[-]|
|Colour (D65/ 10°) L*||98||98||[-]|
Securoc products overview
[g/ 100 g]
|C10 F11.0||4||45||1% stearic acid|
|D10 F12.0||3.5||50||2% stearic acid|
Products for rubber compounding:
Production location: Lefkara (GR), Maastricht (NL)
Application: Securoc C/D products provide flame-retardancy along with good smoke suppression and char-formation, either by itself or in combination with ATH.