Waterborne polyurethane topcoat is an environmentally friendly high-performance coating that uses water as a diluent. It is non-toxic, harmless, non flammable, and non explosive, and is widely used in industrial anti-corrosion and decoration fields. The following is a detailed introduction about waterborne polyurethane topcoat:
Environmental performance
Waterborne polyurethane topcoat uses water as a diluent, eliminating harmful volatiles in traditional solvent based coatings, and is environmentally friendly, harmless to workers and the environment. Its production, storage, transportation, and construction processes are all non-toxic and harmless, and the construction and cleaning tools are convenient.
Application area
Waterborne polyurethane topcoat is suitable for various environments, including all environments in ISO 12944-2 standard, and is particularly suitable for painting in moderate or highly corrosive environments. It is widely used in fields such as steel structures, bridge engineering, marine engineering, ports and docks, pipelines, construction, petrochemicals, municipal engineering, etc., balancing the dual functions of anti-corrosion protection and aesthetic decoration.
Construction method
The construction methods of waterborne polyurethane topcoat include spraying and brushing. Before construction, the substrate needs to be surface treated to remove oxide scale and oil stains, and sandblasted or shot blasted to achieve Sa2.5 level standards. It is recommended to use spraying or brushing during construction, with a dry film thickness of 40-60um. When applying the second coat of paint film, it should be applied after the previous coat has completely dried.
In summary, water-based polyurethane topcoat has become an important choice in the field of modern painting due to its environmental friendliness, high performance, and wide range of applications.
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