Hydrophobic Precipitated Silica ALOS-PS-009

Hydrophobic precipitated silica ALOS-PS-009 is a silazane surface-treated hydrophobic silicon dioxide specifically designed for defoamer applications. It exhibits outstanding bubble-breaking efficiency and excellent dispersibility in hydrophobic solvent systems. Thanks to its advanced surface modification, ALOS-PS-009 integrates easily into a wide range of defoaming formulations, including mineral oil-based and silicone oil-based formulations, providing fast foam knockdown and long-lasting foam control. In addition to its primary role in defoamers, ALOS-PS-009 is widely used in moisture-sensitive powder systems as a flow aid and anti-caking agent. It improves powder fluidity, reduces agglomeration, and enhances storage stability by effectively resisting moisture absorption.

Typical Parameters

• Product Name: Hydrophobic Precipitated Silica ALOS-PS-009
• Catalog: ALOS-PS-009
• Appearance: White powder
• Silica Content: ≥99%
• Average Particle Size: 3 μm
• Ignition Loss: 5.8%
• pH Value (10% suspension): 6.5
• DBP Absorption Value: 2.3 cm³/g
• BET Specific Surface Area: 160 m²/g

Product Advantages

• Outstanding defoaming efficiency. Hydrophobic precipitated silica ALOS-PS-009 delivers exceptionally high defoaming performance, providing rapid foam knockdown and long-lasting foam suppression in a wide range of formulations.
• Excellent adaptability to harsh systems. This product performs reliably in diverse defoaming environments. Even in strongly acidic or strongly alkaline systems where conventional silica products often fail, it maintains stable performance and consistent defoaming activity.
• High-productivity processing. Compared with hydrophilic fumed silica, this product offers unmatched advantages. Its silazane surface modification is completed efficiently during production, eliminating the need for additional long-term heat treatment. This significantly reduces energy consumption, shortens processing cycles, and increases overall production efficiency.
• Low dosage with fast dispersion. This product is effective with small additions, typically requires 20-40% less dosage than other hydrophobic precipitated silicas. It breaks foam quickly, provides extended antifoaming duration, and disperses easily in most systems. Uniform dispersion can generally be achieved by mixing at room temperature or by heating to 60-80 °C and stirring for 30-60 minutes.

Applications

Hydrophobic precipitated silica ALOS-PS-009 is widely used as a key active component in industrial defoamers for coatings, papermaking, and textile printing and dyeing.

• Coatings: This product is used in defoamers for architectural and industrial coatings, providing rapid foam destruction and long-lasting defoaming performance during production, mixing, and application. It helps to quickly eliminate surface and entrapped foam, improving film appearance and coating performance.
• Papermaking: This product can be incorporated into defoamers used in papermaking to control foam in pulp preparation and paper production processes, enhancing runnability and paper quality.
• Textile printing and dyeing: It is also applied in defoamers for textile processing to suppress foam during dyeing, printing, and finishing, ensuring uniform treatment and consistent product quality.

Packaging

Standard packaging is 5 kg heavy-duty polyethylene (HDPE) bags. In addition, we provide customized packaging options to accommodate specific customer requirements, including alternative bag sizes and special labeling.

Note

During storage, transportation, and use, it should be strictly protected from humidity to prevent caking and performance degradation.

Storage

Store the product in a tightly sealed container in a cool, dry, and well-ventilated area. Keep it away from direct sunlight, heat sources, and any potential contaminants to maintain product quality.