HJSIL® R272 Hydrophobic Fumed Silica, DDS treated Fumed Silica,

HJSIL® R274 Hydrophilic Fumed Silica, Silica treated with DDS

HJSIL® R272 Hydrophobic Fumed Silica

HJSIL® R272 is a kind of hydrophobic fumed silica, treated with DDS (Dimethyldichloro-silane). It’s high purity white colloidal powder.

1.Used as thickening, thixotropic, reinforcement in RTV silicone rubber

2.Rheology control of adhesive

3.Used as anti-settling, thickening, anti-sagging agent in coatings, inks

4.Improvement of free flow and anti-caking characteristics of powders

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CHARACTERISTIC

TECHNICAL DATA

APPLICATIONS

PACKAGING

CHARACTERISTIC

HJSIL® R272 is a kind of hydrophobic fumed silica, treated with DDS (Dimethyldichloro-silane). It’s high purity white colloidal powder.

Properties

Used as thickening, thixotropic, reinforcement in RTV silicone rubber
Rheology control of adhesive
Used as anti-settling, thickening, anti-sagging agent in coatings, inks
Improvement of free flow and anti-caking characteristics of powders

TECHNICAL DATA

Properties and test methods	Unit	Typical value	Standardization
Specific surface area (BET)	m2/g	110 ± 20	GB/T20020
pH value (in 4% dispersion)		3.8 ~ 5.0	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%	≤ 2.0	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%	0.6 ~ 1.2	GB/T20020

APPLICATIONS

● RTV silicone rubber and silicone sealants
● Adhesives and sealants
● Paints and coatings
● Printing inks and toner
● Cable compounds and gels

PACKAGING

HJSIL® R272 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.

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