Maiken Chems
Maiken Industrial Materials (Xiamen) Co., Ltd.
Hydrophilic & Hydrophobic Fumed Silica
Application
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Reinforcement
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Thickening agent
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Anti-caking, Flow aid agent
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Toughening agent
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Matting agent
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Transparency agent
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Anti-sagging agent
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Anti-adhesion agent
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Anti-slip agent
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Catalyst carrier, etc.
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Rheology Control agent
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Anti-settling agent
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Thermal insulation agent
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Defoaming agent
Fumed Silica
Fumed silica, or pyrogenic silicon dioxide, is one kind of pure amorphous white inorganic powder that has a high specific surface area, nano-scale primary particle size, and a relatively high (among silica products) concentration of surface silanol groups. The properties of fumed silica can be chemically modified by reaction with these silanol groups.
Synonyms: Pyrogenic silica, Fumed Silica Dispersion, Silicon Dioxide, Fumed SiO2
Chemical Formula: SiO2
CAS Number: 112945-52-5
Hydrophilic Fumed Silica
Hydrophilic fumed silica is a silica-based polymer with a tendency to absorb moisture. It is used in high-technology fields or as an ingredient in the paints, coatings, electronics, and optical fibres industries.
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Particle Size – Primary: 7-20nm
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Agglomerates(average ): 1-50um
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Tamped density: 40-120 g/l
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Purity: SiO2 Content > 99.8%
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Loss on drying: < 0.5-1.5% @ 105℃/2h
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Crystal structure: amorphous
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Specific gravity: 2.2g/cm3
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Aggregates (average):150-300nm
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Specific surface area (BET): 90-400 m2/g
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pH in 4% dispersion: 3.7-4.5
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Sieve residue (45um): < 0.025%
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Loss on ignition: < 1% @1000℃/2h
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Refractive index: 1.46
Grade
MK-30
MK-50
Specific Surface Area(m²/g)
pH Value in Dispersion
Loss on drying 105℃ (%)
Loss on Ignition (%)
Sieve Residue (45μm) (mg/kg)
Silica Content (%)
Tamped
Density
(g/L)
Product Application
30±10
3.8~4.8
50±20
3.8～4.8
≤1.0
≤1.0
≤300
≥99.8
≤1.0
≤1.5
≤250
≥99.8
50~120
50~120
Surface treatment for base materials, including polishing and grinding, Coatings, and Paintings, Printing inks, Resins, Plastics, Thermal Materials, Fireproof Materials, Personal Care Products, Food and Construction material
MK-90
100±20
3.9～4.5
≤1.0
≤1.5
≤250
≥99.8
45~60
Surface-treatment for base materials, Polish &Grind, Coatings,
Printing, Personal Care Products, Food
MK-150
150±15
3.9～4.5
≤1.5
≤2.0
≤250
≥99.8
40~60
Silicone rubber, rubber, offset printing, medicines, cosmetics,
creams, thermal insulation materials
MK-200
200±20
3.9～4.5
≤2.0
≤2.0
≤250
≥99.8
40~60
Silicone rubber, adhesives, inks, coatings, pharmaceuticals,
defoamers, thixotropic resins, gelcoat resins
MK-260
260±20
3.9～4.5
≤2.0
≤2.0
≤250
≥99.8
40~60
HTV & LSR Silicone Rubbers, Adhesives, Coatings & Printing
Inks, UPR resins, Thermal Materials
MK-300
300±30
3.9～4.5
≤2.0
≤2.5
≤250
≥99.8
40~60
silicone rubber, rubber, coatings, paint
MK-380
380±30
3.9～4.5
≤2.5
≤2.5
≤250
≥99.8
40~60
Silicone rubber, defoamer, ink, adhesive, pesticide
MK-450
440±40
3.9～4.5
≤2.5
≤2.5
≤250
≥99.8
40~60
High transparent LSR, Adhesives, Coatings & Printing Inks, Deformers, Carrier
Hydrophobic Fumed Silica
Hydrophobic fumed silica is a form of silicon dioxide (commonly known as silica) that has hydrophobic groups chemically bonded to the surface. It’s treated silica or structure-modified silica. Maiken hydrophobic fumed silica is structure-modified silica after being treated by HMDS (Hexamethyldisilane), PDMS (Polydimethylsiloxane) and DDS (Dimethyldichlorosilane).
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Particle Size – a little bit bigger than the relative hydrophilic item
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Tamped density: 40-120 g/l
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Carbon Content: 0.5%-6%
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Loss on drying: < 0.1-1.5% @ 105℃/2h
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Crystal structure: amorphous
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Specific gravity: 2.2g/cm3
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Specific surface area (BET): 90-400 m2/g
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pH in 4% dispersion: 3.0-10
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Sieve residue (45um): < 0.025%
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Loss on ignition: < 1% @1000℃/2h
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Refractive index: 1.45-1.46