Properties of Acetonyl Acetone

4-Methyl-3-Pentenone-2 Isopropyl idone Acetone Methyl Isobutenyl Ketone 

Mesityl oxide is on unsaturated, medium-boiling ketone mode by the dehydrotion of diacetone alcohol. 

It is a colorless to straw-yellow, oily liquid with a peppermint-like odor. It will darken and form a solid residue an exposure arxl aging. It is miscible with most organic liquids and it is a good solvent for such substances os nitrocellulose, ethylcellulose, law-viscosity cellulose acetate, polyvinyl chloride, vinyl resins, hydrocarbons, raw linseed oil, kauri gum, rosin, ester gum and synthetic rubber. It will only partly dissolve shellac and dewaxed dammar. 

Mesityl oxide is used in lacquers and thinners where its presence in the solution lowers the viscosity and gives it both a high tolerance for hydrocarbons ond resistance to humidity. Its excellent solvent power for gums and resins is especially applicable in vinyl-type resins, where it produces films that are taugh, glossy and have good flow its presence permits use of larger proportions of aromatic hydrocarbon diluents. 

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