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Additives CAS Database

Chemically Produced Highly Flame-retardant Halogen-free Magnesium Hydroxide

Magnesium hydroxide is a high-performance filler flame retardant produced through a chemical process, offering excellent flame retardancy and smoke suppression.

  • Item No.:

    ASFR
  • Brand:

    iSuoChem
  • Color:

    White powder
  • Features:

    Highly-flame retardant halogen-free
  • Product Details

Product Description

Under high temperatures, magnesium hydroxide decomposes. This releases bound water and absorbs significant latent heat. As a result, the surface temperature of polymer materials drops sharply, delaying combustion effectively.

The decomposition also produces magnesium oxide—a heat-resistant material. It forms a dense protective layer, boosting the material’s fire resistance.

Additionally, the released water vapor dilutes flammable gases. It also suppresses smoke formation. This dual action makes magnesium hydroxide a highly effective, green flame retardant with smoke-reducing properties.

This product is suitable for use in various polymer materials, such as plastics, rubber, and cables. While ensuring flame retardancy, it is also environmentally friendly, non-toxic, and halogen-free, making it an ideal alternative to traditional flame retardants.

CAS No.: 1309-42-8

 

Product performance reference table

Typical indicators

ASFR-22

ASFR-61

Magnesium hydroxide (Mg(OH)₂),%

≥99

≥98.5

Iron ion (Fe³+),%

≤0.005

≤0.005

Chloride ion (Cl-),%

≤0.05

≤0.4

Surface moisture, %

≤0.5

≤0.5

Particle size (d50), μm

1.5

1.5

(Hunter) Whiteness

≥97

≥97

Note: The data listed are typical values for product performance parameters and do not represent product specifications.

Recommended modifications:

 

Modified grades

Performance characteristics of Magnesium Hydroxide

A

Water resistance, dispersibility

B

Water resistance, dispersibility

J

Elongation (high filling), smoke density

F

Excellent water resistance and strength (cross-linked system)

N

Excellent water resistance, elongation (cross-linked system)

S

Excellent water resistance, excellent elongation, and processing fluidity

X

Water resistance, processing fluidity, oxygen index

 

Highly-flame retardant halogen-free system flame retardant (60% MDH)

Flame retardant material properties

Conventional modified magnesium hydroxide

ASFR-22-J

Machining balance torque, Nm

59-60

59-60

Tensile strength, MPa

13.8

14.0

Elongation at break, %

178

193

Oxygen index, %

34

35

Smoke density (flameless)

275

280

Product Features: Highly filled system with high elongation

 

Magnesium-aluminum composite system (10% MDH)

Flame retardant material properties

aluminum hydroxide

ASFR-61-B

Melt index (150°C, 21.6kg), g/10min

5.7

5.1

Tensile strength, MPa

12.2

12.5

Elongation at break, %

192

184

Oxygen index, %

33

35

Smoke density (flameless)

339

216

Product features: Improve flame retardant performance and reduce smoke density

 

Product Packaging

Magnesium Hydroxide ASFR-22 Series: 20kg waterproof bag, 1000kg pallet

 

ASFR-61 Series: 20kg or 25kg waterproof bag, 1000kg or 1250kg pallet

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