Precipitated Silica /fumed silica (SiO2) CAS NO.7631-86-9

Hydrophobic silica is commonly after reprocessing of products, under some appropriate conditions will generally hydrophilic silica and silane coupling agent treatment response, and obtained a kind of surface has polysiloxane grafting of solid powder silica, the hydrophobic contact Angle can reach 70 to 150, has the good hydrophobic property.

No.
PHYSICO-CHEMICAL PROPERTIES
Data
TEST METHOD
UNIT
1
SiO2 Contents
≥ 93
HG/T 3062
%
2
Appearance
White, Fine Odourless, Powder
Visual
/
3
45μm Sieve
≤0.5
HG/T 3064
%
4
Loss on Drying (105°C, 2h)
4.0-7.0
HG/T 3065
%
5
Loss on Ignition (1000°C, 2h)
3.0-6.0
HG/T 3066
%
6
PH Value
6.5-7.1
HG/T 3067
/
7
Nitrogen adsorption specific surface area
140-190
GB/T 10722
m²/g
8
Copper Contents
≤10
HG/T 3068
mg/kg
9
Manganese Contents
≤40
HG/T 3069
mg/kg
10
Iron Contents
≤400
HG/T 3070
mg/kg
11
DBP Oil Absorption Value
2.55-2.8
HG/T 3072
cm³/g
12
Stress at 500% Elongation
≥13.0
HG/T 2404
MPa
13
Tensile Strength
≥19.0
HG/T 2404
MPa
14
Elongation at Break
≥675
HG/T 2404
%