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发布时间:2019-08-13 00:00:00
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HB-620

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

Characteristics

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

 

Applications

HTV silicone rubber & LSR

Coatings & printing ink

Adhesives & Sealants

Powder Coatings

Properties

Reinforcing filler for elastomer

High hydrophobicity and stable thixotropy

Anti-settling, 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 Typical Value Testing Method
pH value in 4% dispersion H2OEthanol=1:1 - 5.5~8.0 GB/T 20020
Loss on drying(2 hours at 105℃) % ≤0.5 GB/T 20020
Loss on ignition(2 hours at 1000℃ based on material dried for 2 hours at 105℃) % ≤4.0 GB/T 20020
Silica Content(Based on ignited material) % ≥99.8 GB/T 20020
Tamped Density(Based on material dried at 105℃ for 2 hours) g/dm³ 40~60 GB/T 20020
Carbon Content (Based on material dried at 105℃ for 2 hours) % 1.5~2.5 GB/T 20020

 

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