Glycol Ethers

Butyl Di Glycol

Butyl di glycol (also known as BDG, butyl dioxitol, diethylene glycol monobutyl ether, 2(-2butoxyethoxy) ethanol and butoxydiethylene glycol) is a colourless, clear liquid with a faint characteristic odour, and the formula C8H18O3.  It is soluble in water and miscible with many common solvents, and also has low volatility and a high boiling point.  These are the factors that make butyl di glycol most useful in the paint industry.

Production

Butyl di glycol is one of the co-products formed when ethylene oxide is reacted with n-butanol using a catalyst.

Storage and Distribution

Butyl di glycol is stored and transported either in bulk isocontainers or in drums made of mild steel and/or stainless steel.  It is not classified as dangerous for any form of transport but it classified as an Irritant.  It has a flash point of 105 °C (closed cup) and a specific gravity of 0.955.

Uses

Butyl di glycol is most commonly used in the coatings and paint industries where its low volatility and high boiling point have seen it widely accepted as a flow promoter for baking finishes such as melamine, urea, phenol, or epoxy resin composites.  It is also widely used in stove enamels as it has a high evaporation number which means that the enamel properties can be improved without it affecting the drying time.  It also has a role in air-drying paints as it increases “brushability”.

Butyl di glycol is also found in the printing industry where it is a solvent for printing inks, and is also a starting material in the production of butyl diglycol acetate.