Selection of film-forming additives for water-based coatings

Similar to true solvents and co-solvents in solvent-based paints, film formation in water-based systems Auxiliaries play a similar role and can also be classified accordingly. Regarding the drying of water-based paints, there is a classic evaluation: the drying of solvent-based paints is dominated by temperature and interfered by humidity; the drying of water-based paints is dominated by humidity and interfered by temperature. The selection and matching of film-forming additives are crucial to the performance of the coating Importantly, if a formula performs well, it is because of the film-forming additive; vice versa. However, the process of volatilization of film-forming additives from the system is extremely complicated, especially for mixed solvents, and an accurate description cannot be given so far.

　Some data on film-forming additives (for reference)

Good film-forming aids: can reduce the usage of film-forming aids and make the formula more flexible;

Quick drying: This is self-evident for the importance of filler orientation and early performance;

Appropriate volatilization gradient: Appropriate amount of slow evaporation film-forming additives can improve film density and prevent edge shrinkage. Very helpful;

Currently mainstream Film-forming additives include propylene glycol methyl ether (PM), ethylene glycol butyl ether (BCS), diethylene glycol ethyl ether (DEE) and diethylene glycol butyl ether (DEB).

�In order to reduce the usage of film-forming additives, the formula is more flexible;

Quick drying: This is self-evident in the importance of filler orientation and early performance;

Appropriate volatilization gradient: An appropriate amount of slow evaporation film-forming additives is of great help to the density of the film and the prevention of edge shrinkage;

The current mainstream choices of film-forming aids include Propylene glycol methyl ether (PM), ethylene glycol butyl ether (BCS), diethylene glycol ethyl ether (DEE) and diethylene glycol butyl ether (DEB).