Polyurethane Specifications

Polyurethane Specifications

Polyurethane is based on the polyaddition reaction between a polyol (an alcohol with more than one hydroxyl group per molecule) and adiisocyanate. The reaction is exothermic.

The polymerization can be influenced by the type of polyol and isocyanate components as well as additives.

The cell formation is obtained by the addition of a blowing agent or inclusion of air.

The blowing agent can be an Halogented Hydro Carbons with a low boiling point but also the presence of water in the reacting mixture produces a foaming effect because the isocyanate groups react with water forming carbon dioxide.

Basic Polyurethane Properties:
Solid Polyurethane Elastomers 1,200 kg/m3 Print Rollers, Cast Elastomers, RIM solid plastics
Microcellular Foams and Elastomers 800 kg/m3 Coatings, Adhesives, Sealants, and Elastomers
Low Density Foams 6 kg/m Footwear Outsoles, Footwear Midsoles, Integral Skin Foam,
Simulated Wood For Vehicle Interiors High Resiliency Foam
For Insulation Foam Bedding And Upholstery Packaging Foam
  Density Stiffness Flexible, Semi- Rigid, Rigid
Thermal Conductivity Comparison List:
Insulation Material Thermal Conductivity (K_Value) W/mC Thickness (MM)
Rigid Polyurethane Foam 0.019 34
Phenolic Foam 0.037 42
Expanded Polystyrene 0.040 48
Expended Cork 0.045 50
Fiber Glass 0.045 40
Reinforced Cement 0.050 90
Glass Mineral Wool 0.055 55
Foam Glass 0.060 69
Cement Foam 0.060 100

The following Table Shows How Polyurethanes Are Used:
Application Amount of Polyurethane used (Millions of Pounds) Percentage of total
Building & Constructions 1,298 23.8%
Transportation 1,298 23.8%
Furniture & Bedding 1,127 20.7%
Appliances 278 5.1%
Packaging 251 4.6%
Textiles, Fibers & Apparel 181 3.3%
Machinery & Foundry 178 3.3%
Electronics 75 1.4%
Footwear 39 0.7%
Other uses 558 10.2%
Total 5,444 100.0%