BYK-023

Product Details

CasNo： 112945-52-5

MF： SiO2

Appearance： liquid

Delivery Time： 15 days

Packing： 25kg/drum

Purity： 99%

1. Chemical Composition

Mixture of defoaming polysiloxanes, hydrophobic silica particles, and a polyether-based carrier fluid. This formulation combines the rapid foam-breaking ability of polysiloxanes with the foam-suppression persistence of hydrophobic particles, while the polyether carrier enhances compatibility with water-based systems.

2. Typical Physicochemical Data

3. Features and Advantages

• VOC-Free and Environmentally Friendly: Complies with global environmental regulations (e.g., EU REACH, U.S. LEED) and meets the demand for low-emission water-based coatings, inks, and adhesives.
• Dual Efficiency on Foam: Excels at both breaking existing macro-foam and suppressing the formation of micro-foam—effectively preventing defects like pinholes, craters, and surface haze in high-gloss or semi-gloss finishes.
• Excellent Compatibility: The polyether carrier minimizes incompatibility issues (e.g., shrinkage, loss of gloss) common in silicone defoamers, making it suitable for sensitive systems like acrylic, styrene-acrylate, and polyurethane dispersions.
• Long-Term Stability: Maintains consistent defoaming performance during long-term storage of formulations (no degradation or loss of efficacy) and resists shear forces during mixing or application (e.g., airless spraying).
• Amine-Neutralized System Compatibility: Works well in amine-neutralized water-based coatings (e.g., industrial primers, wood coatings) without reacting with amines or affecting curing efficiency.

4. Application Fields

• Water-Based Coatings: Industrial coatings (plastic coatings, metal coatings), architectural coatings (exterior wall paints, interior latex paints), wood coatings (furniture lacquers, floor varnishes), and automotive refinish coatings (water-based basecoats).
• Printing Inks: Water-based flexographic inks, gravure inks (for packaging materials like paper, film), and screen printing inks.
• Adhesives & Sealants: Water-based acrylic adhesives (for labels, tapes), water-based polyurethane sealants, and pressure-sensitive adhesives.
• Other Water-Based Systems: Pigment concentrates, water-based putties, and water-based textile coatings.

5. Recommended Dosage

The dosage is determined by the specific application and formulation, with the following guidelines (based on as-supplied form relative to total formulation weight):

• Water-based coatings: 0.1% - 0.8% (0.3% - 0.5% for optimal balance of efficiency and cost)
• Printing inks: 0.2% - 1.0% (higher dosage may be needed for ink systems with high foaming tendency, e.g., pigment-rich inks)
• Adhesives: 0.05% - 0.5% (lower dosage sufficient for most acrylic adhesive systems)
  Note: The optimal dosage must be confirmed through small-batch compatibility and performance tests to avoid potential defects.

6. Addition Method

• Ideal Addition Stage: Add during the grinding phase (e.g., when preparing pigment pastes) to ensure uniform dispersion and early foam suppression; alternatively, add to the final formulation before packaging.
• Dispersion Requirement: Due to moderate incompatibility of silicone components, the defoamer must be added under medium to high shear force (e.g., using a high-speed disperser at 1,500 - 3,000 rpm for 5 - 10 minutes) to avoid agglomeration or surface defects (e.g., craters).
• Post-Addition Check: After adding, stir the formulation gently to ensure no local concentration of the defoamer; allow the system to stand for 24 hours to verify that no foam rebounds.

7. Packaging Specifications

• Standard packaging: 25 kg plastic buckets, 200 kg HDPE drums (anti-leakage design, suitable for global transportation).
• Custom packaging: Available for large-volume orders (e.g., 1,000 kg IBC tanks) upon request.

8. Storage and Transportation

• Storage Conditions: Seal and store in a cool, dry, and well-ventilated indoor area (temperature: 5℃ - 30℃); avoid direct sunlight, freezing (below 0℃ may cause emulsion breaking), and high temperatures (above 40℃ may reduce stability).
• Shelf Life: 24 months from the production date (when stored in unopened original packaging under recommended conditions); if sedimentation occurs, stir gently to restore homogeneity—performance remains unaffected.
• Transportation: Classified as non-hazardous goods (complies with UN3481 for aqueous emulsions); avoid collision or extrusion during transportation to prevent packaging damage.