HJSIL® R620 Hydrophobic Fumed Silica

HJSIL® R620 is a kind of hydrophobic fumed silica, treated with HMDS (hexamethyldisilazane). It’s high purity white colloidal powder.

1.Provides good reinforcement and transparancy for HTV and liquid silicone rubber

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

3.High surface area, small particle size and good decentrality, performanca high anti-foam property

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CHARACTERISTIC

TECHNICAL DATA

APPLICATIONS

PACKAGING

CHARACTERISTIC

HJSIL® R620 is a kind of hydrophobic fumed silica, treated with HMDS (hexamethyldisilazane). It’s high purity white colloidal powder.

Properties

Provides good reinforcement and transparancy for HTV and liquid silicone rubber
High hydrophobicity and stable thixotropy, using in coating and ink can prevent from anti-caking, anti-sagging, anti-thixoteopy
High surface area, small particle size and good decentrality, performanca high anti-foam property
Improve the free flow, homogenity and probability stability of carbon powder

TECHNICAL DATA

Properties and test methods	Unit	Typical value	Standardization
Specific surface area (BET)	m2/g	180±20	GB/T20020
pH value (in 4% dispersion)		5.5 ~ 7.5	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%	1.6~ 2.0	GB/T20020

APPLICATIONS

● Elastomer, HTV and liquid silicone rubber
● Coatings and inks
● Anti-foamer
● Carbon powder for printer

PACKAGING

HJSIL® R620 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.