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RH Hydrophobic Silica for Paints & Coatings
Formerly known as HO.PC.2499
BY-O-COAT HO 300PD is a bio-based hydrophobic silica synthesized from rice husk and surface-treated with PDMS (polydimethylsiloxane). Engineered for versatility, it is widely used across a range of paint and coating applications, offering enhanced water repellency, anti-settling, and improved surface properties.
5 Outstanding Benefits
Scratch Resistance
Improves film strength & durability
Water Resistance
Provides effective moisture protection
Corrosion resistance
Protects against moisture and chemicals
Rheology Control
Stabilizes viscosity, prevents sagging and settling
Eco-Friendly & Pure
Bio-based, high-purity, and sustainable
Typical Applications
Marine Protective Coatings
Wood Surface Coatings
Automotive Paint Systems
Industrial Shield Coatings
Technical Specifications
Unit |
|---|
- |
- |
% |
g/cm3 |
μm |
- |
Property |
|---|
State |
Appearance |
Loss on Drying
(2h in 105 oC) |
Bulk density |
Particle size (D50) |
pH (in 4 % solid dispersion)
(H2O : Ethanol = 1:1) |
Spec |
|---|
Amorphous –
Micron powder |
White |
Max 5.0 |
0.05 – 0.10 |
4.0 – 8.0 |
7.0 – 9.0 |
Property | Unit | Spec |
|---|---|---|
Form | - | Amorphous micronized powder |
Color | - | White |
Loss on Drying (2h, 105°C) | % | ≤ 5.0 |
Tamped Density | g/cm³ | 0.02 – 0.07 |
Particle Size (D50) | µm | 4.0 – 8.0 |
Surface Area (BET) | m²/g | 150 – 350 |
Properties
Anti-settling
4/5
Anti-sagging
5/5
Corrosion resistance
5/5
Packaging & Shelf Life
-
Supplied in 8 kg multi-layer paper bags
-
Shelf life: 24 months from the date of production when stored in a dry, sealed condition away from moisture and direct sunlight
Safety & Handling
-
Avoid generating dust; use only in well-ventilated areas
-
Prevent prolonged contact with skin and avoid inhalation of airborne particles
-
Dispose of product and packaging in accordance with local environmental regulations
First Aid Measures
-
In case of skin or eye contact, rinse thoroughly with water
-
If inhaled, move to fresh air and rinse mouth/nasal passages if needed
-
Seek medical attention if irritation or symptoms persist
