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Hydrophobic fumed silica-BQS620

  • Silica Siwin-BQS620
  • Siwin
  • Silica Siwin-BQS620
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Silica Siwin-BQS620

hydrophobic fumed silica


Characteristics

BQS-620 is hydrophobic fumed silica which is produced by BQS-200 after chemical post-treatment with HMDS (Hexamethyldisilazane).


Applications

HTV silicone rubber and LSR

Coatings & printing ink

Adhesives & Sealants

Powder Coatings

Properties

•Reinforcing filler for elastomer

•High hydrophobicity and stable thixotropy

•Anti-settling and anti-sagging agent in coatings and printing ink

•Free flow aid and anti-caking aid for powders

•Rheological control for adhesives and sealants

Physical & Chemical Data

Properties

Unit

Standard

Value

Testing

Method

Specific surface area (BET)

m2/g

200±20

GB/T 20020

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


5.5 ~ 8.0

GB/T 20020

Loss on drying(2 hour at 105°C)

%

<0.5

GB/T 20020

Loss on ignition

(2 hour at 1000° based on material dried for 2 hours at 105°C)

%

<4.0

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


Packing

10kg/bag kraft paper.

12 month shelf life.

                                                            

ISO9001:2015



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