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      Polyurethane finish paint

      Polyurethane finish paint

      Composition: It is two component self drying coating, which composed of polyurethane resin, pigments, additives, fillers, solvents and other components
      Performance: It has good atmospheric chemical resistance, kerosene and gasoline hydrocarbon solvent resistance and mechanical performance is excellent, but weather resistance and anti UV ability is poor.
      Product specification:
      Paint film color: specified by the customer
      Mixing ratio: Flat products: main paint: curing agent=20:4
      High optical products: main paint: curing agent=20:5

      Application: The paint is often used for the surface of ships, bridges, lamps and other outdoor steel structure, cement and building materials, to decoration and corrosion.
      Product specification
      Paint film color: specified by the customer
      Mixing ratio: Flat products: main paint: curing agent=20:4
      High optical products: main paint: curing agent=20:5

      Technical parameters

      Item Index
      Color and appearance of paint film Flat and smooth
      fineness 30μm
      Viscosity(painting-4) 40~70s
      Adhesion(level) 2
      Flexibility 1mm
      Drying time surface dry:1h    hard dry:12h
      Impact strength 50kg.cm
      Hardness (pencil) 2H
      salt water resistance 168h No bubbles, no abscission
      Acid resistance(3% HCl 48h) No bubbles, no abscission
      Alkali resistance(3% NaOH 48h) No bubbles, no abscission

      Supporting system
      Polyurethane finish paint can be applied to various industrial environments:
      ?Carbon steel, cast iron: epoxy zinc-rich primer, epoxy iron oxide red primer, epoxy zinc phosphate primer, inorganic zinc-rich primer
      ?Galvanized steel, stainless steel, aluminum alloy: stainless steel, galvanized sheet special primer, epoxy zinc chromate primer, etc
      ?Concrete: epoxy sealing primer + epoxy micaceous iron oxide intermediate paint

      Construction method
      1、Base material processing
      The coated base material surface must carry out thorough removal of grease, scale, rust, old coating, and etc., using shot or sand blasting method, to reach Sweden derusting standard Sa2.5 grade and roughness of 30-70μm, manual derusting methods can also be adopted to reach Sweden derusting standard St3 grade and roughness of 30-70μm.
      2、Mixture
      According to the weight ratio (the label on the product packaging shall prevail)
      When mixing, under the condition of stirring the main agent continuously, slowly pour in curing agent to make it fully ad evenly stirred.
      20 min after curing of the well mixed coating, filter with 60-80mesh screen, and pour into another container for spare use.
      The mixed coating is valid for 3 hours; please arrange the use according to the construction progress.
      3、Construction conditions
      Coating operation shall be performed as soon as possible after the substrate processing, generally not exceeding 8 hours. The substrate surface temperature and environmental temperature are generally no less than 10℃, the surface temperature shall be at least 3℃ higher than the dew point temperature, and the relative humidity of the air shall not exceed 85%.
      4、Coating method
      This coating can use brush coating, airless spraying and auxiliary air spraying method for construction.
      5、Dilution
      Generally the coating shall use the matching thinner to adjust viscosity and cleaning tools.
      6、Coating intervals
      One-component paint can carry out later coating after drying; two-component paint is suggested to have the coating time intervals as follows:

      Substrate temperature 5℃ 20℃ 30℃
      Shortest 48h 24h 16h
      Longest No limit
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