PUR was developed in Germany during World War II. Its main application is in coatings, elastomers and foams. This type of polymer has a very high resistance to abrasion. Due to the combination of low heat transfer and cost effectiveness, it is widely used as an insulating material.
PUR is used as insulation and other limited applications with high temperature capability of about 250 degrees Fahrenheit. It does not have good resistance to direct sunlight or in contact with most organic solvents. There are two common types of PUR: based on polyester and based on polyether.
Advantages
- High abrasion resistance
- Low temperature
- Extensive variable molecular structure
- Relatively low cost
Disadvantages
- Poor thermal ability
- It is attacked by most solvents
- Flammable
Polyurethane (PUR) is supplied in the form of SHEETS and RODS in different dimensions and sizes.