Grease paint (code Y) is a type of paint with drying oil as the main film-forming substance. Commonly used drying oils include tung oil, linseed oil, and catalpa oil. After the vegetable oil is refined and bleached to remove impurities, different , and they are subjected to high-temperature cooking under certain process conditions; chemical reactions such as oxidation, polymerization or addition occur to increase the relative molecular weight and molecular weight of the oil. Viscosity, thus resulting in refined oils, film- forming bases for pure grease paints. Add a drier to the base material to obtain clear oil (also known as cooked oil). Refined oil is ground together with pigments, fillers or other auxiliary materials in different proportions to make various oil-based blending paints, oil-based antirust paints and thick paints. Grease paint is easy to produce, low in price, good in brushability, and flexible in coating film. The disadvantage is that it dries slowly, is not suitable for assembly line applications, has poor mechanical properties, is easy to swell when soaked in water, is not resistant to acids, alkalis and organic solvents, and cannot be polished.
This kind of paint mainly includes four categories: clear oil, thick paint, blending paint and antirust paint. Clear oil can be used alone for waterproof, anti-corrosion and anti-rust use, and can also be used to prepare thick paint and red lead anti-rust paint. Thick paint--generally used for coating on buildings and water pipe joints with low requirements, and can also be used as a primer for wood. Oil-based blending paint is used for protection and decoration of general metals, wood, and buildings. Oily antirust paint as steel primer. Due to limited performance , the proportion of such paints in paint production tends to decrease.
