1, according to the boiling point classification
(1) Low-boiling solvents (boiling point below 100 degrees) These solvents are characterized by fast evaporation, easy drying, low viscosity, and most have aromatic odors. Typical of such solvents are active solvents or diluents. For example: methyl ether, methyl formate, acetone, benzene, etc.
(2) Medium-boiling solvent (boiling point 100-150 degrees) This type of solvent is used for nitro spray painting and has good leveling property. For example: butanol, toluene, cyclohexanone, etc.
(3) High-boiling solvent (boiling point 150-200 degrees) This type of solvent is characterized by slow evaporation rate and strong dissolving power. When used as a coating, the coating film has good fluidity and can prevent the precipitated coating film from whitish. For example: ethyl lactate, sterols, etc.
(4) Plasticizers and softeners (boiling point around 300 degrees Celsius) These solvents are characterized by the formation of films with good viscosity and good toughness. For example: camphor for nitrocellulose
2, according to evaporation rate classification
(1) Rapid Evaporation of Solvents Evaporation rate is more than 3 times that of butyl acetate
(2) Evaporation of solvent at medium speed Evaporation rate 1.5 times or more of butyl acetate
(3) Slowly evaporating the solvent evaporates faster than commercial amyl alcohol and slower than sec-butyl acetate
(4) Slow evaporation of solvent Slower than industrial pentane
3, according to polarity classification
(1) Polar solvents
(2) Non-polar solvents
4, according to chemical composition
(1) Organic solvents
(2) Inorganic solvents