Microbial Contamination Control in Architectural Coatings Production

Microbial contamination during architectural coatings production (e.g., raw material storage, grinding) causes viscosity loss and spoilage. A East China plant reported 15% batch rejection due to bacterial degradation in summer.

Chemi Tech KMB-155 bactericide features:

Dual mechanism:

Quaternary ammonium disrupts cell membranes;

Heterocyclic chains penetrate biofilms against Pseudomonas.

Process tolerance:

Stable at ≤80℃ for direct addition during grinding;

pH compatibility (4-10) for alkaline putty/neutral latex.

Case: South China Coating Plant Upgrade

Originally, bacterial blooms in grinding tanks required monthly shutdowns. After adopting KMB-155:

Dosing: 0.1% at pigment grinding + 0.05% at resin mixing;

Results:

Bacterial count dropped from 10 to <102 CFU/mL;

Tank cleaning extended from 10 to 45 days;

Zero mold on coatings after 18-month aging.

Deployed in 12 plants with 85% spoilage reduction.