Polyurethanes Improving Lives And Protecting The Planet In New Ways Every Day!
What is Polyurethane (PUR)?!
Polyurethane foam is one of the most efficient, high performance insulation material,
enabling very effective energy savings with minimal occupation of space!
PU is a polymer composed of a chain of organic units joined by (urethane) links.
Polyurethane foam (PUR)
- An organic insulation material made from a reactive mixture of two principal liquid components and a number of additives, to produce highly cross linked polymers with a closed cell structure. The liquid components may be a hydroxyl group of a polyester, polyether, or polyalcohol with a di-isocyanate.
- The foam produced will not normally be ignited by a small heat source, but a larger flame will cause ignition and fire spread, with abundant smoke and toxic decomposition giving off hydrogen cyanide, oxides of nitrogen, and carbon monoxide. The Flash Ignition temperature is 320-420 degrees C. The self-ignition temperature is 420-550 degrees C.
Polyisocyanurate foam (PIR)
- Polyisocyanurate is made in the same way as polyurethane, but the ratio between the components and the type of additives is usually different, to produce a polymer containing chemical bonds with a higher temperature resistance. The increase in the decomposition temperature depends entirely on the concentration of these bonds and on the aromatic content. Process control factors are more critical than with PUR. The smoke and decomposition products are similar to PUR.