Chemi Tech KM-1305 Defoamer Solves Foam Challenges in High-Pigment PU Systems

High-pigment concentrates (>35% content) enhance color saturation in solvent-based polyurethane (PU) coatings but entrain microfoam in viscous systems, leading to craters, fish-eyes, and gloss loss. Chemi Tech's KM-1305 defoamer addresses this through molecular design and rheology synergy.

Technology: Targeted Defoaming and Viscosity Reduction

Nano-carrier precision: Silica nanoparticles loaded with polyether-modified siloxane adsorb onto pigment surfaces, destabilizing foam without compromising dispersion;

Flow control: Reduces slurry viscosity by 30%, improving flow and suppressing bubble regeneration during mixing.

Case Study: High-Gloss Black Coating for Faucets

A luxury faucet manufacturer faced cratering and uneven gloss due to 40% carbon black content. After adopting KM-1305:

Process compatibility: Added at 0.4% during pigment pre-dispersion, cutting dispersion time by 20%;

Surface perfection: Achieved mirror finish (60° gloss >95) with zero craters and excellent adhesion;

Durability: ΔE <1.5 after 500h accelerated aging, exceeding industry benchmarks.

Extended Applications

KM-1305’s rheology control adapts to complex systems:

Metallic paints: No interference with aluminum flake orientation;

Gradient spraying: Enhanced flow ensures interlayer fusion in multi-coat processes;

High-cure coatings: Withstands 180°C baking temperatures for industrial lines.

Chemi Tech’s innovation lies in tailoring HLB values to match pigment polarity, balancing defoaming and thixotropy for high-pressure environments like three-roll milling.