Hydrophobic agent is a special chemical additive mainly used to improve the waterproof performance of material surfaces. The following is a detailed introduction about hydrophobic agents:
Definition and Properties
Definition:
Water repellent agent is a mixed compound, typically an opaque white liquid.
Nature:
hape: Opaque white liquid.
Viscosity: Depending on the model, viscosity may vary. For example, SS-01 model has a viscosity of 4500 ± 500 mPa · s, while SS-02 and 02A models have a viscosity of 2500 ± 500 mPa · s.
H value: 7 ± 1.
torage stability: typically up to 12 to 13 months.
Mechanism of action
The mechanism of action of hydrophobic agents is mainly based on "hydrophobic action" or "hydrophobic effect". In aqueous solution, non-polar functional groups (such as carbon hydrogen chains) approach and combine with each other to form a special water-resistant structure, changing the contact angle and giving the surface hydrophobic, hydrophobic, waterproof and other properties. This effect causes water and other liquids to form discontinuous bead like structures on the surface of the material, thereby improving the waterproof performance of the material.
Uses
Hydrophobic agents are widely used in various water-based coatings, water-soluble resins, water-based emulsion resins, water-based pigments, water-based inks, and impeachment materials (in small quantities). It can form a special water-resistant structure on the surface of the coating film, giving the surface excellent properties such as lotus leaf double hydrophobicity, self-cleaning, hydrophobicity, waterproofness, stain resistance, and scrub resistance.
Usage and precautions
Usage method:
Add hydrophobic agents during the paint mixing process, with a recommended amount of 2% -5%, but the specific situation can be determined according to the user's needs.
When the addition amount is small (1% -4%), hydrophobic agents can be directly added without affecting the coating formula.
When adding a large amount (5% -7%), the coating formula should be adjusted appropriately, such as reducing water usage, reducing filler usage, etc., to ensure that the solid content and color to base ratio of the original coating formula remain unchanged, and to adjust viscosity and pH value.
Matters needing attention:
Avoid touching hands when using, as hydrophobic agents may be sticky.
Pay attention to controlling the amount added to avoid problems such as poor fluidity, prolonged drying time, and increased viscosity of latex paint caused by excessive addition.
Pay attention to dilution methods and compatibility with other materials to avoid adverse reactions.
Application Fields
Hydrophobic agents are widely used in industries such as construction, textiles, plastics, and metal processing. For example, in the construction industry, hydrophobic agents are commonly used in waterproof coatings, waterproof mortar, waterproof concrete and other materials to improve the waterproof performance of buildings. In the textile industry, hydrophobic agents are commonly used for the finishing of natural and synthetic fibers such as cotton, linen, silk, and wool to improve the waterproof, oil resistant, and stain resistant properties of textiles.
In summary, hydrophobic agents are powerful chemical additives that can effectively improve the waterproof performance of materials and have broad application prospects in multiple fields.
