Hydrophobic Fumed Silica HB-152
Fumed Silica
HB-
152
Characteristic
FM-H-B152 is hydrophobic fumed silica which is produced by hydrophilic fumed silica with specific surface area of 200m²/g after chemical post-treatment with DDS (Dimethyldichlorosilane)
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Applications |
Properties |
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● RTV silicone rubber, especially RTV-T |
● Higher hydrophobicity,thixotropy,thickening, transparency and reinforcement |
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● Adhesives & sealants |
● Anti-settling,anti-sagging agent |
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● Coating & printing ink |
● Rheology control in adhesives |
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● Powder coating |
● Free flow aid and anti-caking aid for powders |
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● Thixotropy and reinforcement in RTV silicone sealants,the hydrophobic feature gives RTV silicone sealants a long shelf-life |
Physical and Chemical Data (Standard: GB/T 20020)
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Test Item |
Unit |
Typical Value |
|
Specific Surface Area(BET) |
m²/g |
170±30 |
|
Carbon Content(Based on material dried at 105℃ for 2 hours) |
% |
0.8～1.6 |
|
pH value in 4% dispersion |
-- |
≥ 3.7 |
|
Loss on drying( 2 hours at 105℃) |
% |
≤ 0.7 |
|
Loss on ignition (2 hours at 1000℃, based on material dried for 2 hours at 105℃) |
% |
≤ 2.5 |
|
Tamped Density (Based on material dried at 105℃ for 2 hours) |
g/L |
40～60 |
|
Silica Content (Based on ignited material) |
% |
≥ 99.8 |
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