The oil degree of oil-based paint is closely related to its performance. Oil degree refers to the degree of volatilization of solvent in the paint, which is usually measured by the paint cup flow method. The common unit is second (s), and the common oil degree range is 20-90 seconds. Oil-based paints with different oil degrees have different performance characteristics, as follows:
The solvent in oil-based paint with higher oil content evaporates slowly, and the drying time is relatively long; the solvent in oil-based paint with low oil content evaporates quickly, and the drying time is relatively short.
The oil-based paint with higher oil content contains more oleo-acid resin, which has better adhesion; the oil-based paint with lower oil content contains more resin, and the adhesion is relatively poor.
Oil-based paints with higher oil content have higher content of oleic acid resin and better water resistance; oil-based paints with lower oil content have higher resin content and relatively poor water resistance.
The oil-based paint with higher oil content contains more oleo-acid resin, and the gloss is better; the oil-based paint with lower oil content contains more resin, and the gloss is relatively poor.
In addition, the oil degree of oil-based paint is also related to its applicable coating method. Generally, oil-based paints with higher oil content are suitable for thicker coating films, and can be applied by spraying or rolling in thicker ways to ensure their drying time and film adhesion. Oil-based paints with lower oil content are suitable for thinner coating films, which can be applied by spraying or brushing in thinner layers to ensure their gloss and smoothness. During the coating process, the coating process and coating conditions should be adjusted according to the oiliness of the paint and the coating method. For example, for oil-based paint with higher oil content, less spray pressure and larger nozzle aperture should be used to prevent excessive spraying of paint, causing coating defects such as sagging and missing coating; For oil-based paint, higher spray pressure and smaller nozzle aperture should be used to ensure uniform and smooth coating film.
To sum up, the degree of oil directly affects the drying time, adhesion, water resistance and gloss of oil-based paint. Specifically, the appropriate oil-based oil-based paint should be selected according to the use environment and requirements to achieve a better coating effect. installation effect and service life.
