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Synthetic Magnesium Hydroxide

APPLICATION:

Magnesium hydroxide is used as a highly efficient non-toxic inorganic flame retardant, filler and smoke suppressing additive for the manufacture of almost all types of plastics and filled (co)polymer compositions on the basis of PVC, PA, PS, PP, PE, PET, etc., in pharmaceutical industry for the manufacture of laxatives, antacids and other magnesium-containing medicines, in food industry as acidity regulator, color stabilizer, and the source of elemental magnesium.

ADVANTAGES OF USE COMPARED TO NATURAL ANALOGUE BRUCITE

Regular crystalline structure, chemical purity, constancy of particle size distribution ensure stability of performance indices of the obtained compositions and their processing conditions, reduction of loading on extruder’s engine up to 30%, increase of thermal stability of polymer compositions; manufacturability of white compositions and finished items; increase in speed of compositions processing up to 40% and their flexibility.

ADVANTAGES OF USE COMPARED TO ALUMINUM TRIHYDRATE

Decrease of thermal degradation of plastics due to higher thermal absorption in the decomposition process (up to 328 kkal/g); higher temperature range of thermal degradation (330- 450°C of magnesium hydroxide vs. 220°C of aluminum trihydrate); significantly higher quality indices: whiteness, abrasiveness and adjustable dispersion.

ADVANTAGES OF USE COMPARED TO SUB-MICRON ANALOGUE

Better processability (energy saving while processing); higher electrical resistance (more effective at the manufacture of insulating materials); reduced flammability of compositions and finished items, their higher safety for people and smaller environmental impact while burning.

MAIN TECHNICALS PARAMETERS

INDEX
NORM
Grade А
Grade B
Grade М7
Grade М10
1 Appearance
White powder
White paste
White powder
White powder
2 Fraction of magnesium hydroxide total mass, %, min
99.0
50.0
97.0*
97.0*
3 Fraction of volatile matters total mass at 105 °С, %, max
0.3
50.0
0.3
0.3
4 Fraction of iron converted to iron oxide (Fe2O3) total mass, %, max
0.01
0.02
0.01
0.01
5 Fraction of calcium converted to calcium oxide (CaO) total mass, %, max
0.15
0.08
0.20
0.20
6 Fraction of chlorides total mass, %, max
0.10
0.05
0.10
0.10
7 Fraction of silicon dioxide (SiO2) total mass, %, max
0.05
0.08
0.10
8 Fraction of sulfates total mass, %, max
0.10
0.20
9 Fraction of aluminum converted to aluminum oxide (Al2O3) total mass, %, max
0.05
0.10
10 Fraction of loss on ignition total mass at 1000 °С, %
30.0-33.0
30.0-33.0
30.0-33.0
11 Bulk density, g/cm3, min
0.40
0.30
0.30
12 Fraction of oil absorbed magnesium hydroxide, g, max
60.0
40.0
50.0
13 Specific surface area, m2/g
5.0-8.0
8.0-15.0
14 Particle size distribution:
diameter 10 % particles (d10), max
diameter 50 % particles (d50), max
diameter 90 %particles (d90), max

0,70
1,65
4,10




0,70
1,65
4,10

0,70
1,65
4,10
* Fraction of total mass is determined for the product, containing the modifier