The chemical industry of the world, the various substances used are very complicated. Today there is methyl ethyl ketone, also known as butanone, which is active and has a wide range of uses in chemical industry. It often exists in various reaction systems and is an important agent for synthesis.

There are ethyl acetate and methyl acetate, both of which are fragrant and play a significant role in the field of organic synthesis and coating preparation. It can help materials to blend, making the finished product uniform in texture and good in color.

Acetone is also a common organic solvent. Its solubility is strong, which can dissolve many substances in it, and is indispensable in the separation and purification steps of chemical production.

As for polyurethane, it is a polymer compound. It has many characteristics such as wear resistance, water resistance, high strength, etc., and is widely used in the manufacture of various materials, such as foam plastics, elastomers, etc., which are of great benefit to industry and people's livelihood.