HJSIL® R622 Hydrophobic Fumed Silica

HJSIL® R622 is a kind of hydrophobic fumed silica, treated with HMDS (hexamethyldisilazane). It’s high purity white colloidal powder.

1.Reinforcement of HTV silicone rubber, anti-caking

2.High hydrophobicity and stable thixotropy, using in coating and ink can prevent from anti-caking, anti-sagging and anti-thixoteopy

3.Good performance of hydrophobic feature and rheology in adhesives and sealants

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CHARACTERISTIC

TECHNICAL DATA

APPLICATIONS

PACKAGING

CHARACTERISTIC

HJSIL® R622 is a kind of hydrophobic fumed silica, treated with HMDS (hexamethyldisilazane). It’s high purity white colloidal powder.

Properties

Reinforcement of HTV silicone rubber, anti-caking
High hydrophobicity and stable thixotropy, using in coating and ink can prevent from anti-caking, anti-sagging and anti-thixoteopy
Good performance of hydrophobic feature and rheology in adhesives and sealants
Improvement of the free flow of powder coating and anti-caking

TECHNICAL DATA

Properties and test methods	Unit	Typical Value	Standardization
Specific surface area (BET)	m2/g	260±30	GB/T20020
pH value (in 4% dispersion)		5.5 ~ 7.8	GB/T20020
Loss on drying (2 hours at 105 °C)	Wt%	≤ 0.5	GB/T20020
Loss on ignition (2 hours at 1000 °C, based on material dried for 2 hours at 105 °C)	Wt%	≤ 4.0	GB/T20020
Silica content (based on ignited material)	Wt%	≥ 99.8	GB/T20020
Tamped density (based on material dried for 2 hours at 105 °C)	g/L	40 ~ 60	GB/T20020
Carbon content (based on material dried for 2 hours at 105 °C)	Wt%	2.8 ~ 4.0	GB/T20020

APPLICATIONS

● HTV and liquid silicone rubber
● Adhesives and sealants
● Paints, coatings, and printing inks
● Powder coating

PACKAGING

HJSIL® R622 is supplied in 10kg kraft paper bags. We recommend to store the product in closed containers under dry conditions and to protect the material from volatile substances.