Eliminating Micro-bubbles in High-Viscosity PU Flooring: ANJEKA-5520 Performance in Tropical Climates

Technical Background: Challenges for PU Flooring in Tropical Climates

In tropical regions like Southeast Asia, high humidity and temperature pose severe technical challenges for Polyurethane (PU) flooring applications. The reaction between moisture and isocyanate components easily generates $CO_{2}$ bubbles, which, combined with the high viscosity of solvent-free systems, makes micro-bubbles difficult to escape naturally. If not effectively managed, the cured coating will exhibit defects such as pinholes, craters, or even delamination, severely impacting project acceptance.
 

Silicone-Free Defoamers: The Key to Inter-coat Adhesion

For self-leveling floors and anticorrosive coatings, the choice of defoamer is critical. While silicone-based defoamers are efficient, they often cause fisheyes or reduce recoat adhesion in multi-layer applications. ANJEKA-5520, a 100% active content silicone-free polymer defoamer, provides a more reliable alternative.

100% Active Content: Free of diluents, ensuring effectiveness in high-viscosity resins even at minimal dosages.

Silicone-free Structure: Eliminates fisheye defects associated with traditional silicone products, ensuring excellent recoatability and bonding reliability.

Physical Consistency: Maintains a density of $0.80-1.10 g/cm3 at 23 ˚ C, allowing for easy and uniform dispersion in formulations.

Processing Guide: Handling High Shear and Storage Stability

In industrial production, ANJEKA-5520 demonstrates excellent process adaptability. For manufacturers in Southeast Asia, long-term product stability is key to reducing after-sales complaints.

Incorporation: For optimal performance, adding the defoamer prior to the grinding stage is recommended. If added later, sufficient shear force must be applied to ensure proper dispersion.

Storage Stability: The product remains stable for up to 12 months, resisting separation or precipitation.

Temperature Control: Despite the hot climate in SEA, if exposed to low temperatures below 5 ˚ C during transit, turbidity may occur; simply heating to 20˚ C and mixing thoroughly restores clarity without affecting active performance.

For PU flooring professionals in Southeast Asia, ANJEKA-5520 not only addresses the pain point of micro-bubbles on-site but also reduces production complexity through its stable physical parameters (recommended dosage of 0.1-1.0%). Whether in high-speed mixing, roller coating, or casting, it ensures the ultimate integrity of the coating.