Hydromagnesite | Natural Fire Retardant Mineral & Filler

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Hydromagnesite

Nature own fire retardant. Hydromagnesite Chemical formula: [3MgCO3 · Mg(OH)2 · 3H2O] This unique natural minerals is also known as HMH.

It is a proven fire retardant filler in a wide range of polymers and rubbers such as EVA, POE, polyethylene (PE), polyvinyl chloride (PVC), ethylene-propylene diene monomer (EPDM) and Nitrile Rubber (NBR).

KMT HM products comply with RoHs and REACH requirements.
Processing temperature less than 200°C
Packing: 25kg bag or big bag.

Description

Reviews

Introduction

Nature own fire retardant.

Hydromagnesite Chemical formula: [3MgCO3 · Mg(OH)2 · 3H2O]

This unique natural minerals is also known as HMH.

Advantages

KMT HM products comply with RoHs and REACH requirements.

Can achieve very high LOI, smoke reducing, good charring effect.

High whiteness to produce light color or natural color compound.

Low density to reduce compound density.

Easy flow, anti-bridge and agglomerationresistant, easily used in auto-loading and feeding system.

Low compounding torque, no white spot, good surface quality and no sharkskin.

GRADE	HM2	HM2V	HM2SA	HM2E
Hydromagnesite (%)	≥98	≥98	≥98	≥98
CaO (%)	≤1.5	≤1.5	≤1.5	≤1.5
Iron as Fe2O3 (%)	≤0.02	≤0.02	≤0.02	≤0.02
Acid Insolubles (%)	≤0.25	≤0.25	≤0.25	≤0.25
Moisture (%)	≤0.5	≤0.5	≤0.5	≤0.5
Loss on Ignition (%)	≥40	≥40	≥40	≥40
BET (m2/g)	10-13	10-13	10-13	10-13
Whiteness (R457) (%)	≥92	≥92	≥92	≥92
D50 Particle Sizes (μm)	2.5-3.5	2.5-3.5	2.5-3.5	2.5-3.5
Coating	Non-coated	KMT patent for FR PVC	Stearic acid	KMT patent for FR PE

Unique fire retardant properties

KMT HM has a unique 3-stage fire-retardant mechanism. Whereas the classical endothermic flame retardant fillers act by releasing water in a single action process, our premium HM product works as follows:

HM 3-stage fire retardant mechanism

Water is released at temperatures of ~220°C (thermal decomposition)

CO2 release at temperatures of ~330°C

At temperatures of ~560°C, particles accumulate at the surface of the burning polymer to form a stable cementitious char. This char inhibits the combustion process and thus the propagation of the fire through burning droplets.

The platy, high surface area particles of our halogen-free mineral provide excellent properties when you use these as a functional filler in polymers.

The products’ high heat absorption protects polymers from rapid thermal degradation and the formation of combustible products.

KMT HM is halogen-free and eco-friendly with low smoke and toxicity.

HM has an excellent mechanical performance with a higher Oxygen index and low density. and the product with HM has stable color.

Package & Storage:

Jumbo bag package.

Transported as the common chemicals. Keep in dry, cool place and avoid direct sunlight.

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