Hjsil® R272

1 of 5 products in this brand
Hjsil® R272 is a high-purity, hydrophobic fumed silica treated with Dimethyldichlorosilane (DDS). This white colloidal powder offers excellent anti-settling, anti-caking, and anti-sagging properties, making it ideal for use in RTV silicone adhesives and sealants. Its hydrophobic nature enhances water resistance in formulations, while its thickening and thixotropic characteristics provide enhanced rheological control. This silica is particularly effective as a thickener in both plastics and elastomers, where it improves the flow and consistency of the final product. Hjsil® R272 is compatible with RTV silicone, offering stability and reinforcing properties in silicone-based formulations. Available in bags, this product is used in various applications, including adhesives, sealants, and coatings, where it delivers superior performance in preventing settling and sagging.

Chemical Name: Silica, Hydrophobic, Fumed

Chemical Family: Silicon-based Compounds

Compatible Polymers & Resins: RTV Silicone

Physical Form: Powder

Technical Data Sheet
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Enhanced TDS

Identification & Functionality

Chemical Family
Silicon-based Compounds
Chemical Name
Silica, Hydrophobic, Fumed
Manufactured By
Henan Minmetals
CASE Ingredients Functions
Anti-Caking Agent,
Anti-Sagging Agent,
Thickener
Plastics & Elastomers Functions
Thickener,
Thixotrope
Technologies
CASE,
Composite Materials
Product Families
CASE — Additives
Functional Additives,
Rheology Modifiers & Stabilizers,
Surface Modifiers
Composite Materials — Additives
Thixotropes

Features & Benefits

CASE Ingredients Features
Anti-Settling,
Hydrophobic
Key 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

Applications & Uses

Markets
Printing & Packaging
Applications
Printing & Packaging — Printing & Inks
Other Printing Applications
Compatible Polymers & Resins
RTV Silicone
Adhesive & Sealant End Applications
RTV Silicones Adhesives

Properties

Physical Form
Powder
Physico-Chemical Properties
ValueUnitsTest Method / Conditions
Carbon Content (based on material dried for 2 hours at 105°C)0.6 - 1.2wt%GB/T20020
Tamped Density (based on material dried for 2 hours at 105°C)40 - 60g/lGB/T20020
Silica Content (based on ignited material)min. 99.8wt%GB/T20020
Loss on Ignition (2 hours at 1000°C, based on material dried for 2 hours at 105°C)max. 2wt%GB/T20020
Loss on Drying (2 hrs at 105°C)max. 0.5wt%GB/T20020
Specific Surface Area90 - 130m²/gGB/T20020
Specifications
ValueUnitsTest Method / Conditions
pH Value (in 4% dispersion)3.8 - 5.0-GB/T20020

Packaging & Availability

Packaging Type
Bags
Packaging Information

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.