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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 o

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

Description

Reviews

HM Series--- Flame retardant to replace Antimony Trioxide(ATO)

Introduction

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).

Advantages

Low carbon green product from nature

G7ood replacement of ATO (15hpr HM2V=1phr ATO)

Reduce FR PVC smoke density

Good synergistic flame retardant of ATH, reduce compound cost.

Improve self-extinguish, easy pass UL test.

High whiteness, not cause compound color change because of it's high purity

Low density

Processing temperature less than 200°C

Packing: 25kg bag or big bag.

Grade	HM2	HM2V	HM2SA	HM2S
Hydromagnesite (%)	≥98	≥98	≥98	≥98
MgO(%)	≥40	≥40	≥40	≥40
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 (%)	50-55	50-55	50-55	50-55
BET (m2/g)	10-14	10-14	10-14	10-14
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	No coating	KMT patent For FR PVC	Stearic acid	Silane coated

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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