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Hydrophobic fumed silica-BQS152

  • Silica Siwin-BQS152
  • Siwin
  • Silica Siwin-BQS152
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Silica Siwin-BQS152

Hydrophobic fumed silica


Characteristics

Type HB-152 is a hydrophobic silica treated by DDS (dimethyldichlorosilane) of QS-200(200m2/g)


Applications

RTV silicone rubber, especially RTV-T.

Adhesives & Sealants.

Coatings, Printing ink.

Powder Coating.


Properties

Higher hydrohpobicity, thixotropy, thickening, transparency and reinforcement.

Anti-settling and anti-sagging agent.

Rheology control in adhesives.

Free flow aid and anti-caking aid for powders.

Thixotropy and reinforcement in RTV silicone sealants, the hydrophobic feature gives RTV silicone sealants a long shelf-life


Physical & Chemical Data

Properties

Unit

Standard Value

Testing Method

pH in 4% dispersion (H2O: Ethanol=1:1)


3.7-4.5

GB/T 20020

Loss on drying (2 hour at 105°C)

%

≤0.7

GB/T 20020

Loss on ignition

(2 hour at 1000°based on material

dried for 2 hours at 105°C)

%

≤2.5

GB/T 20020

Silica content (based on ignited material)

%

≥99.8

GB/T 20020


Tamped density

(based on material dried for 2 hours at 105°C)

g/dm2

40-60

GB/T 20020

Carbon content (based on material

dried for 2 hours at 105°C)

%

0.8-1.6

GB/T 20020


Packing

10kg/bag kraft paper.

12 month shelf life.





                                                         





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