One-component moisture-curing polyurethane anti-corrosion coating is an important variety of anti-corrosion coatings. It has the following advantages. It is easy to construct and has low requirements for substrate processing. Unlike other single-component coatings, paint one-component polyurethane does not require workpiece surface. Dry, even if there is a water film on the surface of the workpiece, it can be completely cured.
Since it is not required to have a stricter proportion of the components as the two-component coating, the anticorrosive paint is particularly suitable for large-area outdoor coating, also known as low surface treatment paint, and the construction scope is wide, generally above zero, and the relative humidity is 30. %~98% can be applied. Even in winter, foggy days, fluorocarbon paint or even damp base on fine rainy days, it can be used for normal construction and drying. The higher the red-NOC value of the paint, the more linear chains in the molecule. The higher the crosslink density of the coating film, the better the abrasion resistance, but the coating film is too hard and brittle, so the one-component polyurethane is usually modified with polyether, and the floor paint reduces the hardness of the coating film and improves the flexibility of the coating film.
When dried under temperature and humidity, moisture-curable polyurethane coatings contain a large amount of urea bonds and methylol groups. Therefore, the abrasion resistance of the coating film is better than that of the two-component polyurethane. The silicone high temperature resistant paint is chemically resistant and resistant. Special lubricants, anti-atomic radiation resistance, moisture-curable polyurethanes can be used as both topcoats and primers. One-component moisture-curable polyurethane coatings have good surface tolerance for a variety of substrates. Adhesion In addition, the epoxy zinc-rich primer also has good adhesion to pre-coated substrates, such as excellent adhesion to PVDF silicon-containing polyesters and plastic solvents. Sexual, alkyd paint can be used together with cathodic protection under wet conditions. It is not particularly used with kerosene as a filler. However, the one-component moisture-curable polyurethane alkyd blend paint also has the following disadvantages and two components. Compared to polyurethane coatings, antistatic paints, moisture-curable polyurethane coatings provide abrasion resistance and good chemical resistance coatings in moisture and weather conditions.
It is not a substitute for two-component polyurethane paint, mainly because it is inferior to two-component polyurethane coatings in many aspects. In addition, the curing of moisture-curable polyurethane depends largely on the humidity in the air. The film is cured by air. Temperature influence, when the humidity of the air is lower than 30%, the drying speed of the coating film is much slower, the asphalt paint is not cured thoroughly, and the performance of the coating film is too high. The drying and curing speed of the anti-rust paint is too fast, which will cause inconvenience to the storage. .
Hydrophilic aluminium foil is hydrophilic treatment of aluminium foil. Through special process treatment, a layer of hydrophilic layer is coated on its surface. Condensate water will disperse quickly on the hydrophilic aluminium foil, and will not condense into water droplets, increase the heat exchange area, accelerate the refrigeration heating speed, and effectively avoid the noise caused by condensate water hindering air flow.
Hydrophilic aluminium foil is the main raw material of heat exchanger of household air conditioner, which has a great influence on the efficiency of air conditioner. If the raw material of the heat exchanger is hydrophilic aluminium foil, the refrigeration efficiency can be increased by 5%. It also has the function of anti-corrosion and anti-mildew, no odor, and will not cause the accumulation and blockage of water droplets to affect the heat transfer. The national standard for aluminium sheet and strip (GB/T 3880-2006) is applicable to the unified standard for aluminium alloy sheet and strip materials. Aluminum Foil is defined in GB/T3880-2006 as having a thickness of less than 0.2 mm.
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