At present, there are two major types of waterproof materials on the market: one is polyurethane waterproof coating. Such materials are generally made from polyurethane and coal tar as raw materials. The charcoal volatilized by it is highly toxic and not easy to remove, so it was banned in China in 2000. The polyurethane waterproof coating that is still on sale uses asphalt instead of coal tar as a raw material.
However, when such a coating is used, it is generally diluted with an organic solvent such as toluene or xylene, and thus contains toxicity;
The other type is a polymer cement based waterproof coating. It consists of an emulsion of a variety of water-based polymers and a high-quality cement mixed with various additives. The flexibility of the polymer (resin) is integrated with the rigidity of the cement, making it excellent in impermeability and stability. Its advantages are convenient construction, low comprehensive cost, short construction period, and non-toxic and environmental protection. Therefore, polymer cement base has become the protagonist of the waterproof coating market.
Waterproof coating refers to a coating formed by a coating to prevent rain or groundwater from leaking.
Waterproof coatings can be divided into emulsion type, solvent type, reactive type and modified asphalt according to the state and form of the coating.
The first type of solvent-based coatings: These types of coatings are numerous and of good quality, but they are costly and have poor safety. They are not very common.
The second type is water-based and reactive polymer coatings: such coatings are difficult to uniformly disperse various reinforcing agents, fillers, and polymeric elastomers in the colloid, and can only be added by grinding. A small amount of compounding agent, the reactive polyurethane is a two-component, easy to deteriorate, and high in cost.
The third type of plastic modified asphalt: These products are UV resistant and have good high temperature resistance, but the elongation at break is slightly poor.
Asphalt waterproof coatings are:
1. Waterproof emulsified asphalt coating, mainly used for waterproofing buildings;
2. Colored emulsified asphalt coating for waterproofing roofing;
3. Cationic emulsified asphalt waterproof coating, mainly used for waterproofing of cement board, gypsum board and fiberboard;
4. Non-ionic emulsified asphalt waterproof coating, mainly used for roof waterproofing, underground moisture protection, pipeline anti-corrosion, channel anti-seepage, underground waterproofing, etc.;
5. Asphalt-based thick waterproof coating, mainly used for waterproofing roofing;
6. Asphalt grease diluted waterproof coating for waterproofing of roofing;
7. Fatty acid emulsified asphalt for waterproofing roofing;
8. Asphalt moisture-proof coating for waterproofing roofing;
9. Thick asphalt moisture-proof coating, can be used as potting material
10. Pengrun soil emulsified asphalt waterproof coating, used for roof waterproofing, repairing leaking parts of floor, underground engineering, seed bank surface moisture proof;
11. Lime emulsified asphalt waterproof coating, mainly used for roof waterproofing and building pavement waterproofing;
12. Amino polyvinyl alcohol emulsified asphalt waterproof coating, mainly used for waterproof coating;
13. Acrylic emulsified asphalt, which can be used to repair and deteriorate the surface of asphalt, such as the waterproof layer of road pavement;
14. Asphalt phenolic waterproof coating, mainly used for roofing and underground waterproofing;
15. Asphalt neoprene coating for waterproofing roofing.
Eight characteristics of waterproof coating:
1. The waterproof coating is a viscous liquid at normal temperature. After being cured by coating, it can form a seamless waterproof coating film.
2. Waterproof coating (Luoyang Paint Co., Ltd.) is suitable for waterproof construction in the detailed structure such as standing, yin and yang angle, wearing structural layer pipes, bulges and narrow places, and can form a complete waterproof membrane on complex parts.
3, waterproof coating construction is a cold operation, easy to operate, low labor intensity.
4. The waterproof layer of the coating film formed after curing is light in weight, and most of the special-shaped roofs such as light and thin shells are constructed with waterproof coating.
5, coating film waterproof is a good water resistance, weather resistance, acid and alkali resistance and excellent elongation properties, can adapt to the local deformation of the base layer.
6. The tensile strength of the waterproof layer of the coating film is strengthened by adding the reinforcing material of the carcass. It is easy to strengthen, reinforce and repair the parts that are likely to cause leakage, such as cracks in the base layer, structural joints, and pipe roots.
7. The waterproof coating film is manually painted, and its large thickness is difficult to be uniform. Therefore, when painting, it is repeatedly applied repeatedly to ensure the use of unit area and ensure the quality of the waterproof layer of the coating film.
8, using the film waterproof, easy to repair
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