Phenolic resin coating drying characteristics

Drying of phenolic resin coatings

After the phenolic resin coating is painted, the coating dries slowly and takes a long time. For example, after the F01-1 phenolic novolac is painted, it takes up to 15 hours to dry at a room temperature of 25°C.

Phenolic resin drying process and characteristics

Taking the above as an example, one feature is that it interacts with the oxygen of the air under a certain temperature and humidity conditions in the natural environment and dries to form a film. During the drying process, the solvent in the paint gradually volatilizes, and the unsaturated fatty acids contained in the oil in the paint will absorb air. A considerable amount of oxygen in the oil undergoes oxidative polymerization reaction with the unsaturated double bonds in the oil, and the molecules of the oil are combined with each other, changing from small molecules to large molecules, and finally the solid macromolecules that become a network structure are the paint film.

Another feature is that this kind of paint contains a small amount of metal soap drier. Although the amount is small, it has the effect of promoting the oxidation polymerization reaction of the coating during the drying process of the paint. Range dry.