Polyester polyols are a type of polymer used primarily in the production of flexible and rigid foams, coatings, and adhesives. They are created by the reaction of diols and dicarboxylic acids, resulting in a versatile material that can be tailored for various applications. Their chemical structure allows for good mechanical properties and resistance to heat and chemicals. These polyols are commonly used in the manufacture of polyurethane products, which are found in furniture, insulation, and automotive components. The properties of polyester polyols can be adjusted by changing the types of acids and alcohols used in their synthesis, making them suitable for a wide range of industrial uses.