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Properties of silicone waterproof agent


Silicone waterproof agent has two properties: water-based and oily. The water-based silicone waterproof agent is colorless or light yellow. When it is mixed into cement mortar, it can also play the role of retarder, water reducing agent and reinforcing agent. Therefore, it is suitable for waterproof, moisture-proof and pollution-proof treatment of construction industry, exterior wall decoration, underground engineering, antique buildings, water pools, bricks and tiles, cement, gypsum products, thermal insulation materials with perlite as the main material and rural roofs. Oily silicone waterproof agent is transparent. It is generally used for glaze, ceramic tile, floor tile, ceramic, etc. it can be diluted with some solvents, which is convenient to use.
Water repellent principle
The water repellent principle of silicone milk: when the polysilicon milk is heated to above 140 degrees, polysiloxane is aligned on the fabric. The hydrophobic group is CH3, and the silicon atoms and oxygen atoms of the silicone oil emulsion form valence and hydrogen bonds with some atoms on the fiber, so that water vapor and air can pass through the fabric and the water droplets can not penetrate. The hydroxyl of the top of the silicone oil emulsion is grafted with hydrogenated silicone oil, that is, the Si.H bond of hydrogenated silicone oil is hydrolyzed to Si.H, and it is dehydrated to form long chain molecules with hydroxyl terminated hydroxyl group. The molecules become larger, softer and increase water repellency. Silicone oil and hydrogen containing silicone oil are crosslinked on the fabric surface at 150-180 ℃ to form a polyorganosiloxane resin film insoluble in water and solvent. Methyl in silane structure faces outward, resulting in water repellency, membrane discontinuity and air permeability.
Scope of application
It is widely applicable to the internal and external walls of various buildings, especially to solve the indoor mildew problem caused by water seepage from the east wall and North wall of civil houses. In addition, it can also be widely used for moisture-proof and mildew proof treatment before indoor decoration, anti pollution, cleaning, weathering and acid rain treatment of the internal and external walls of industrial plants, as well as reservoirs, water towers, reservoirs Waterproof works of sewage treatment plant and agricultural drainage and irrigation channels; It is also applicable to ancient buildings, stone tablets, ceramic tiles, books and archives, precision instrument room, computer room, power transformation and distribution room, warehouse, etc