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Chemicals

Chemicals

Magnesium oxide

MAGNESIUM OXIDE "STARMAG®"

"STARMAG" is Konoshima's light-burned Magnesium oxide produced from natural raw materials, seawater and limestone.
They are the highest quality products with fine particles by our particle control technology. We can offer various grades for diverse applications.

STARMAG #150

high-reactive grade mainly used for vulcanizing agent for chloroprene rubber.

STARMAG M・P

middle/low-reactive grades mainly used for compounding agent or chemical raw material.

STARMAG PSF-150

High-reactive grade with fine particles.
It has higher purity and whiteness than other grades

STARMAG G

Granular grade with easy handling and good workability.

STARMAG CX-150

high-reactive grade with surface coating to improve dispersibility in polymer and less adherent on mixing roller.

Slide left or right to see the whole table▶
Typical data
High-reactive Middle/low-reactive fine particle Granular Surface-coated
#150 M P PSF-150 G CX-150
Screen residue (75μm)(%) 0.01 0.01 0.03 0.01 0.01
Loss on ignition(%) 7.0 3.0 1.5 8.0 1.5 13.5
Assay as MgO (Ignited basis)(%) 97.5 97.7 98.0 99.0 98.0 97.5
Soluble matter in water(%) 1.2 1.2 1.2 0.3
Insoluble matter in HCl(%) 0.02 0.02 0.02 0.02 0.02 0.03
Calcium oxide(%) 0.7 0.7 0.7 0.3 0.7 0.7
Iron(%) 0.02 0.02 0.02 0.005 0.02 0.02
Bulk density(g/ml) 0.55 0.55 0.60 0.40 1.00 0.60
Specific surface area(m2/g) 145 50 10 145 10 120
Average particle size(μm) 3.5 3.5 3.5 0.6 3.5

Applications

  • Chloroprene rubber/adhesive
  • Synthetic rubbers( FKM, CSM, ECO, CIIR etc. )
  • Plastics
  • Curing agent for Phenolic resin
  • Thickening agent for SMC/ BMC
  • Glass
  • Ceramics
  • Friction material
  • Catalysts
  • Absorbents
  • Chemical raw material
  • Magnesia cement
  • Grind stones
  • Electrical steel
  • Feed additives
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