Page 89 - CW E-Magazine (25-3-2025)

INDEX Konoshima Chemical Co., Ltd.
www.konoshima.co.jp Made in JAPAN

LIGHT MAGNESIUM OXIDE (MAGNESIA)
STARMAG is Light Burned & Reactive Magnesium Oxide of High Purity, isolated from seawater with Chemical process. Each

Grade has special Characteristics such as Good Dispersability & Workability for Various Polymers.
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% % % % % % % (g/ml) (μ) (m2/g) (%)
150 0.5 5.4 97.7 0.7 0.02 0.01 0.02 0.59 3.5 137 0.01
L 0.5 1.5 97.7 0.6 0.02 0.01 0.01 0.55 3.5 25 0.01
P 0.5 1.0 98.1 0.6 0.02 0.01 0.08 0.60 3.5 10 0.1

(Pharma Grade)

I - 2.6 95 0.7 - - 1 - - - -
*1 Measured Aﬞer Ignition *2 Measured by Laser Diffraction Method
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• Chloroprene Rubber (CR) • Chlorosulfonated Polyethylene (CSM/CSP) • Animal Feed
• Halogenated Butyl (CIIR/BIIR) • Fluoroelastomer (FKM) • Fuel Additives
• Epichlorohydrin (ECO) • Chlorinated Polyethylene (CPE) • Agriculture
• Pharmaceutical • Magnesium Salt • Glass Manufacturing

MAGNESIUM HYDROXIDE (MAGSEEDS)
MAGSEEDS has been developed for use as Non-Halogen Flame Retardant of Plastic & Rubber & offer various grade of products
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with different Surface treatments by considering the dispersibility & Compatibility to Polymers.
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• Very fine & sharp particle size distribution which enable uniform dispersion in resin.
• Low Na Content, High Volume Resistivity • Produced directly from sea water • Superior to ATH • Environment - Friendly

BET
Amount of
Grades Moisture Loss on MgO Coating Coating Agent Specific Area Average Particle
Ignition
Agent

Size (D50)
% % % - % m²/g µm
S-6 0.2 30.6 68.6 Vinyl Silane 0.3 5 1.1
S-6F 0.2 30.5 68.5 Vinyl Silane 0.3 9 0.7
LN-6 0.1 30.8 68.4 Faמּy Acid 0.7 5 1.1
MAGNESIUM CARBONATE (GOLD STAR)

GOLD STAR is Characterized by high translucency when blended with Natural Rubber. Heavy type has a low bulk density & Less
Impurities than Ordinary Products. This Granular product has Good Workability & helps to improve product
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• Natural Rubber • Plastic • Food Additives • Air Balloon • Animal Feed Additives • Cosmetics • Gloves • Bladder

Average
Screen
Item Of Moisture Loss on MgO*1 CaO CI pH Whiteness Particle Specific Residue
Bulk
Oil
Surface
Quality Ignition Density Absorption Size Area (BET) (75um)
% % % % % % % % (ml/100g) (um) (m²/g) %
GOLD STAR 2.5 54.2 42.0 0.3 0.04 10.4 96 0.27 140 7 40 0.01
Heavy Type 2.5 55.2 41.5 0.3 0.01 10.4 94 0.50 80 12 35 0.04
Granular 3.0 54.8 41.0 0.4 0.05 10.4 - 0.65 - - 35 -
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P Enduring Partnerships
Chemical Weekly March 25, 2025 89

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