Securoc® D10

• Securoc® D10 is very fine, platy-shaped filler with flame & smoke-retardant properties. In addition, this product works as an effective acid scavenger in halogen containing polymers. The flame-retarding action is based mainly upon the endothermic decomposition of metal hydroxide (heat-sink effect) and simultaneous release of water vapor and CO2. This reaction starts at about 240°C.
• Securoc® D10 is used in applications where processing temperatures exceed 200 ºC, making ATH unsuitable. The main uses are in PVC and chloroprene wire & cable compounds and PVC/NBR foams.

• 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)
• 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

Securoc D10 is also available with different levels of stearic acid treatment, F10.7; F1.1; F1.2 etc.