Classification and characteristics of water-based coatings

Types of water-based coatings

• Water-soluble paint: This type of water-based paint contains water-soluble resin and other types of resin raw materials. After being painted on the wall, these resins can form a film layer to protect the wall. The emergence of water-based paint is called the “third paint revolution” in the industry because of its unparalleled environmental performance.

• Water-dilutable paint: It mainly contains emulsified emulsion to dissolve the resin. During construction, water is directly added to dilute it to achieve the construction effect.

• Water-dispersible paint: The main principle is to use synthetic resin as the main form of emulsion, which is latex paint.

Characteristics of water-based paint

• Water-based fire-retardant coatings use water as the solvent, saving Daxing resources. Water-based coatings eliminate the fire risk during construction; reduce atmospheric pollution; water-based coatings only use a small amount of low-toxicity alcohol ether organic solvents to improve the working environment conditions. The effect of reducing pollution and saving resources is also significant.

• Water-based coatings can be applied directly in humid and wet surface environments; ice-based coatings have strong adhesion and have better adaptability to material surfaces.

• Water-based paint construction coating tools can be washed with water, thus reducing the consumption of cleaning solvents. Good flattenability and other characteristics. In the inner cavity, welds, corners, edges, etc.

• The electrophoretic coating of water-based paint can be applied evenly and flatly, and has good protective properties. Furthermore, the electrophoretic coating has the best corrosion resistance, and the salt spray resistance of the thick film cathodic electrophoretic coating can reach up to 1200h.

• Water-based coatings have high requirements for cleanliness during construction and on the surface of the material. Due to the high surface tension of water, shrinkage holes occur in the film.

• Water-based coatings have poor dispersion stability against strong mechanical forces. When the flow rate in the transportation pipeline changes sharply, the dispersed particles are compressed into solid particles, which will cause pitting on the coating film. Therefore, it is required that the shape of the transportation pipeline must be good and the pipe wall must be free of defects.

• Water-based coatings are highly corrosive to coating equipment, requiring the use of anti-corrosion linings or stainless steel materials, and the equipment cost requirements are also very high. Water-based coatings corrode transportation pipelines, dissolve metal, precipitate dispersed particles, and cause pitting in the coating film. Stainless steel pipes are also required for construction.