4 Types of Antimicrobials / Biocides
Antimicrobial additives (also called Biocides) are used in formulations to keep bacteria from spoiling paint during storage, or to keep fungi, algae and other micro-organisms from growing on the applied paint.
All waterborne paints contain nutrients for bacteria, fungi and yeast. Microbial attack can therefor happen inside the can, which would affect the quality of the paint. When it happens, you can experience:
- Foul odor
- Loss of viscosity
- Phase separation
- pH drop
To protect your coating from such issues & extend the storage life of your coating, you have to use In-can Preservatives. They are organic materials. They are used at low levels; <0.1% by weight typically.
An efficient In-can biocide should have the following properties:
- Long-term protection
Paints may be kept in storage for long periods and exposed to wide temperature variations. Optimum preservation can only be achieved if the in-can preservative is compatible with coating ingredients and is stable over time.