Classification of liquid types of waterproof coatings

China Coatings Online News Information
First, according to the liquid type of paint classification according to the liquid type of paint, waterproof paint can be divided into solvent-based, milk-based, reaction-type three.。 1. Solvent - based waterproofin this type of coating. The polymeric material, which is the main film-forming substance, dissolves in organic solvents and becomes a solution. Polymer materials are stored in solutions (coatings) in molecular states;coating has the following characteristics: through solvent volatilization, through the polymer material molecular chain contact, joining and other processes and conjunctivation; The coating is dry quickly, the conjunctivation film is thin and dense; The production process is simpler, and the stability of coating storage is better. Flammable, explosive, toxic, production, storage and use should pay attention to safety; Due to the rapid volatility of solvents, the environment is polluted during construction.。 2. Water-milk waterproof coatingthis kind of waterproof coating as the main film-forming material of polymer material with very small particles (rather than molecular state) stable suspension (rather than dissolved) in the water, become emulsion-like coating.coating has the following characteristics: evaporation of water, through solid particles close, contact, deformation and other processes and conjunctivation; Paint drying is slow, the compaction of a film is lower than solvent-based paint, generally not suitable for construction below 5 degrees C; The storage period generally does not exceed half a year; Can be slightly damp on the grass- and grass-roots construction; Non-toxic, non-combustible, production, storage and transportation, the use of relatively safe; Easy to operate and does not pollute the environment; Production costs are low.。 3. Reactive waterproof coatingsin this type of coating, as the main film-forming substances of polymer materials in the form of prepolymer liquid. Most of the two-component or single-component composition of the coating, almost no solvents.coatings have the following characteristics: chemical reactions with the corresponding substances through liquid polymer prepolymers, which become solids (conjunctiva); Can be a piece into a thick coating film, no contraction, coating film dense; Two-part coating needs to be on-site 1:2 material accurate; Stir well to ensure quality; The price is more expensive.water-resistant coating the original waterproof material is tar asphalt and petroleum green paper tire linoleum, originated in Europe, the 1920s into Our country. With the progress of science and technology, the rapid development of modern waterproof materials, see the 1970s, a variety of high-minute anti-water materials have come out. China's waterproof materials gradually formed three series of coils, coatings, sealing materials.synthetic polymer waterproof material is a waterproof coating material made from synthetic rubber or contract resin as the main film-forming material, which is made with other auxiliary materials.variety of brands of synthetic molecular waterproof materials, such as polyurethanes, acrylics and their mixtures.Additions 1. Classification Waterproof coatings can be divided into film-forming substances: polymer modified asphalt waterproof coatings, synthetic polymer waterproof coatings and organic-inorganic composite waterproof coatings. For building roofs, toilets, underground and water-resistant projects with impermeable, moisture-proof requirements. Because it cures to form a continuous seam-free waterproof film, so it is particularly suitable for multi-node or special-shaped parts of waterproof, moisture-proof.。 2. Policy-oriented waterproof coatingsIn the Ministry of Construction issued the construction business "11th Five-Year" to promote the application and restriction of the prohibition of the use of technology (first batch) of the announcement, polyurethane waterproof coatings, pure acrylic waterproof coatings, spray polypropylene waterproofing technology and polymer cement waterproof coatings are listed as the promotion of application products (first batch); Tar polyurethane waterproof coatings, water-based PVC tar waterproof coatings (also known as PVC ointments) are listed as prohibited waterproofing works for housing construction.
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