Hydrophobic Fumed Silica, treated with DDS

HJSIL® R274 Hydrophobic Fumed Silica

HJSIL® R274 is a kind of hydrophobic fumed silica, treated with DDS (Dimethyldichloro-silane). It’s high purity white colloidal powder.

1.Reinforcement in elastomer, can effective prevent from structurization and prolong the shelf-life of RTV silicone sealants

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

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CHARACTERISTIC

TECHNICAL DATA

APPLICATIONS

PACKAGING

CHARACTERISTIC

HJSIL® R274 is a kind of hydrophobic fumed silica, treated with DDS (Dimethyldichloro-silane). It’s high purity white colloidal powder.

Properties

Reinforcement in elastomer, can effective prevent from structurization and prolong the shelf-life of RTV silicone sealants
High hydrophobicity and stable thixotropy, using in coating and ink can prevent from anti-caking, anti-sagging and anti-thixotrophy
High hydrophobicity and rheology in adhesives and sealants
Improve the homoeneity and stability of pigment
Improve the free flow of power coating and anti-caking

TECHNICAL DATA

Properties and test methods	Unit	Typical Value	Standardization
Specific surface area (BET)	m2/g	170±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%	0.7 ~ 1.3	GB/T20020

APPLICATIONS

● Elastomer: HTV & RTV silicone rubber, LSR
● Coatings and inks
● Adhesive and sealants
● Negative toners
● Powder coatings

PACKAGING

HJSIL® R274 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.