Which solvent is used in the surface coating industry and in dewaxing of lubricating oils?

Which solvent is used in the surface coating industry and in dewaxing of lubricating oils?

• A. Ethyl Ether
• B. Methyl Ethyl Ketone (MEK)
• C. Acetone
• D. Toluene

Answer: (B)

A solvent used in both surface coatings and dewaxing needs to dissolve a wide range of resins used in paints while also handling the oil-wax balance in lubricants, with a evaporation rate that supports fast film formation. Methyl Ethyl Ketone fits this well. It dissolves many common coating resins effectively, helping formulations flow and form a smooth film, and it dries out relatively quickly due to its moderate boiling point. For dewaxing, MEK can solvate the base oil well but doesn’t keep wax dissolved at lower temperatures, so when the mixture is cooled, the wax precipitates out and can be separated from the oil. This combination of good resin solvency, suitable evaporation, and selective wax precipitation makes MEK the solvent commonly used in both industries. Other solvents may not strike the same balance between coating performance and wax separation.

A solvent used in both surface coatings and dewaxing needs to dissolve a wide range of resins used in paints while also handling the oil-wax balance in lubricants, with a evaporation rate that supports fast film formation. Methyl Ethyl Ketone fits this well. It dissolves many common coating resins effectively, helping formulations flow and form a smooth film, and it dries out relatively quickly due to its moderate boiling point. For dewaxing, MEK can solvate the base oil well but doesn’t keep wax dissolved at lower temperatures, so when the mixture is cooled, the wax precipitates out and can be separated from the oil. This combination of good resin solvency, suitable evaporation, and selective wax precipitation makes MEK the solvent commonly used in both industries. Other solvents may not strike the same balance between coating performance and wax separation.