There are many different types of paint. All of which are different chemically and have different physical properties.

Laquers - Emulsions - Oils - Alkyds - Acrylics
Epoxies - Polyurathanes

Laquers - General industrial finishing, cars, furniture

Emulsions - Household and industrial

Oils and varnishes - Wood and steel primers

Alkyds - Household

Acrylics - Domestic

Epoxies - Anti-corrosive

Polyurathanes - Floors, boats, corrosion resistant metal finishes, concrete and plastic coating