High-Viscosity Color Paste Defoaming: Flawless Coating for Saturated Colors SeoTitle: Chemi Tech Defoamer for High-Pigment PU Systems - Crater-Free Solutions

High-concentration color pastes (>35% pigment) enhance color depth in oil-based PU coatings but trap microfoam in viscous systems, causing craters and gloss loss. Chemi Tech's KM-305 defoamer overcomes this via synergistic rheology-foam control technology.

Innovation: Rheology-Defoaming Synergy

Viscosity Reduction: Polyether branches cut paste viscosity by 30%, improving flowability;

Persistent Foam Suppression: Nano-silica carriers deliver siloxane to pigment surfaces, inhibiting bubble regeneration.

Case: Mirror-Black Faucet Coating

A faucet manufacturer struggled with fisheyes and gloss inconsistency (60° gloss: 80-85) using 40% carbon black paste. With KM-305:

Process Integration: 0.4% dosage during paste pre-dispersion, boosting efficiency by 20%;

Surface Quality: Achieved mirror finish (60° gloss >95) with zero craters or peeling (cross-hatch test);

Durability: ΔE shift <1.5 after 500 hours of 85℃/85% RH aging.

Advanced Applications

Gradient Coating: High flowability enables seamless interlayer blending;

High-Temp Baking: Withstands 180℃ curing for automotive OEM paints;

Wood Sealers: Penetrates wood pores to evacuate air, eliminating bubble traps.

Chemi Tech's polarity-matching technology adjusts defoamer HLB values to align with pigments, maintaining thixotropy during high-shear grinding.