Securoc® D10

Identification & Functionality

Chemical Name

Huntite

CASE Ingredients Functions

Flame Retardant

Plastics & Elastomers Functions

Flame Retardant

Technologies

CASE Ingredients,

Plastics

Product Families

CASE Ingredients — Additives

Functional Additives

Plastics — Polymer Additives

Flame Retardants

Features & Benefits

CASE Ingredients Features

Flame Resistance,

Smoke Suppressant

Materials Features

Excellent Smoke Resistance,

Flame Retardant

Product Highlights

• 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.

Product Background

• 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

Applications & Uses

Markets

Electrical & Electronics

Applications

Electrical & Electronics — Wire & Cable

Jacketing & Insulation

Compatible Polymers & Resins

Chloroprene Rubber (CR),

Polyvinyl Chloride (PVC)

Plastics & Elastomers End Uses

Cable Jacketing

Properties

Physical Form

Powder

Physical Properties

	Value	Units	Test Method / Conditions
Specific Surface Area	16.0	m²/g	BET
Oil Absorption	50.0	g/100g	ISO 787/5
Ry (D65/10°)	93.0	—	—
Moisture Content	0.6	%	ISO 787/2
pH	10.0	—	ISO 787/9
Density	2.7	g/cm³	—
Loose Apparent Density	0.3	g/cm³	—
Hardness	2 - 3	—	Mohs’ scale
Refractive Index	1.61 – 1.64	—	—
Silicon Dioxide	0.5	wt%	XRF
Ferric Oxide (Fe₂O₃)	0.03	wt%	XRF

Particle Size Distribution

	Value	Units	Test Method / Conditions
Percentage Passing on Individual Sieve (45 μm)	0.01	%	Alpine air jet
Particle Size (D50)	3.5	μm	Laser diffraction

Chemical Analysis

	Value	Units	Test Method / Conditions
Magnesium Oxide (MgO)	35.0	wt%	XRF
Calcium Oxide (CaO)	13.0	wt%	XRF
Loss on Ignition (1000°C, 1 hour)	51.0	wt%	XRF

Packaging & Availability

Country Availability

Canada,

USA

Regional Availability

• Canada
• USA

Product Availability

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