Hydrophobic agent for waterborne coatings I. Performance shape Opaque white liquid particle diameter, n m 30-50
Solid content,% 38±1
PH value 7±1
Viscosity, mPa.s 4500±500 (SS-01 type)
2500±500 (SS-02, 02A)
Storage stability 12 months Second, the mechanism of action in the aqueous solution of non-polar groups (such as carbon and hydrogen chain) close to each other, the role of association is the so-called "hydrophobic effect" or "hydrophobic benefits." The result of hydrophobic interactions is that there is a significant attraction between non-polar molecules or groups (ie, "hydrophobic" molecules or groups) in aqueous media. However, "hydrophobic" means that there is a repulsive interaction between such non-polar molecules (or groups) and water molecules, and there is no van der Waals attraction; instead, it indicates that in such non-polar molecules or groups, In the system of water together, there is a tendency of the non-polar molecules or groups to self-associate themselves and show a tendency to escape from the aqueous medium.
By increasing the contact angle from Л/2>θ>0 to Л>θ>Л/2, the coating can exhibit a similar water repellent effect to the lotus leaf.
Third, the adjustment of the precautions
A. When the additive amount is small (additive amount 1% - 3%), the hydrophobic agent can be directly added without changing the coating formulation, and the modified coating has a better facade hydrophobic effect.
B. When the amount of addition is large (3% - 4%), the coating formulation should be adjusted appropriately, such as reducing the amount of water, reducing the amount of filler, ensuring that the original coating formula's solid content and the ratio of the base to the pigment remain unchanged, and finally adjusting the viscosity. And PH value.
C. Recommended dosage: 1%-4%
Solid content,% 38±1
PH value 7±1
Viscosity, mPa.s 4500±500 (SS-01 type)
2500±500 (SS-02, 02A)
Storage stability 12 months Second, the mechanism of action in the aqueous solution of non-polar groups (such as carbon and hydrogen chain) close to each other, the role of association is the so-called "hydrophobic effect" or "hydrophobic benefits." The result of hydrophobic interactions is that there is a significant attraction between non-polar molecules or groups (ie, "hydrophobic" molecules or groups) in aqueous media. However, "hydrophobic" means that there is a repulsive interaction between such non-polar molecules (or groups) and water molecules, and there is no van der Waals attraction; instead, it indicates that in such non-polar molecules or groups, In the system of water together, there is a tendency of the non-polar molecules or groups to self-associate themselves and show a tendency to escape from the aqueous medium.
By increasing the contact angle from Л/2>θ>0 to Л>θ>Л/2, the coating can exhibit a similar water repellent effect to the lotus leaf.
Third, the adjustment of the precautions
A. When the additive amount is small (additive amount 1% - 3%), the hydrophobic agent can be directly added without changing the coating formulation, and the modified coating has a better facade hydrophobic effect.
B. When the amount of addition is large (3% - 4%), the coating formulation should be adjusted appropriately, such as reducing the amount of water, reducing the amount of filler, ensuring that the original coating formula's solid content and the ratio of the base to the pigment remain unchanged, and finally adjusting the viscosity. And PH value.
C. Recommended dosage: 1%-4%