How much water-based paint defoamer is used?
The amount of water-based paint defoamer used usually depends on many factors, including the type
of paint, viscosity, foaming degree, and the required defoaming effect. Generally speaking, the amount
of water-based paint defoamer is recommended to be added at 0.1%~0.5% of the total amount of paint.
However, the specific amount may need to be adjusted according to the actual situation. Here are some
specific suggestions:
High viscosity paint:
For paint systems with higher viscosity, defoaming is relatively difficult due to the large
number of factors that stabilize the foam, so the amount of water-based paint defoamer added may be slightly
more. In some cases, the amount used may reach 0.3%~1.0% of the total amount of paint.
Low viscosity paint or water-soluble coating:
For paint or water-soluble coating systems with lower viscosity, because they contain a certain amount of co-solvents,
the foam stability is relatively low, so the amount of water-based paint defoamer added can be appropriately reduced.
Generally speaking, the amount added is between 0.01%~0.2% of the total amount of paint.
Other water-based coatings or resin systems:
For other types of water-based coatings or resin systems, the amount of water-based paint defoamer added is generally
about 0.1% of the total amount of paintIt should be noted that the amount of water-based paint defoamer added is not
the more the better. Excessive addition may cause paint defects such as shrinkage and oil spots, and may even affect the
recoatability of the paint. Therefore, when using it, tests and adjustments should be made according to the specific situation
to determine the best amount.
In addition
in order to ensure that the water-based paint defoamer can fully play its role, it is also necessary to pay attention to
mixing it with the paint to ensure that the defoamer can be evenly distributed in the paint. This can improve the defoaming effect
while avoiding local excess or deficiency.
