Overview of Polyurethane (PUR)

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Overview of Polyurethane (PUR)

Overview of Polyurethane (PUR) including background, history, advantages, limitations and typical applications.
Background: Polyurethanes (PUR) were developed in Germany during World War II. Dr. Otto Bayer discovered the basic polyurethane chemistry in 1937 and I.G. Farben (Bayer) patented the process.

PUR Generics

- PUR, Unspecified
- PUR-Ether/TDI
- PUR-Ester/TDI
- PUR-Ester/MDI
- PUR-MDI
- PUR-Ether/MDI
- PUR-Eth,aliphat
- PUR-Ester
- PUR-TDI
- Etc...

Typical PUR Applications

- Molds/Dies/Tools
- Bushings
- Wheels
- Adhesives
- Foam
- Sealants
- Gaskets
- Seals
- Liners

Advantages of PUR

- Abrasion Resistance, Good
- Toughness, Good
- Impact Resistance, Good
- Viscosity, Low
- Elongation, High
- Hydrolytically Stable
- Tear Strength, Good
- Flexibility, Good
- Resilient

Disadvantages of PUR

- Poor thermal capability
- Poor weatherability
- Attacked by most solvents
- Utilize toxic isocyanates
- Flammable

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