Currently, there is no single biocide that possesses all the properties of an ideal biocide. However, blends of bio-actives may be used to optimize performance and approach the efficacy of the "ideal" biocide.
Microbial growth in the wet state is usually manifested by a loss of product functionality and may include gas formation, offensive odors and changes in pH, viscosity and color.3 Microbial contaminants can be introduced with water (process water, wash water), with raw materials (latex, fillers, pigments, etc.) and by poor plant hygiene. Bacteria are the most common spoilage organisms, but fungi and yeasts are sometimes responsible for product deterioration. Spoilage of the waterborne products, which may go unnoticed until the product reaches the consumer, can result in significant economic loss. Good plant hygiene and manufacturing practices, when combined with the use of an optimized biocide, will minimize the risk of microbial spoilage of the coating.4,5