Performance of silicone resin-high surface activity and low tension
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Since polysiloxane is a symmetric molecule and the substituent is a non-polar organic group, the entire molecular formula is non-polar. The inter-molecular force is small, and the cohesion of the molecule itself is also small, so the surface tension is small. When it is dispersed on the surface of a medium with a large surface tension, the medium can be separated, and because the interaction between the molecule itself and the molecule Therefore, it can reduce the surface tension of the medium, making it difficult to form foam. This is the reason why silicone oil can be used in paints to defoam. Therefore, it can be used as a defoamer and leveling agent in paints to prevent paint film from emitting light and pitting. The dosage is 0.2% to 0.3%.
