312 – Polyurethane (PU/PUR)

Polyester Urethane (AU)

Polyether Urethane (EU)


Temperature Range:

-60°C to +110°C  (-76°F to +230°F)

Intermittent High 130°C (Int 265°F)



Polyurethane elastomers are based on the poly-addition of diol-ester (AU) or diol-ethers (EU) with diisocyanate. The diol-ethers excel in mechanical strength, low heat resistance, chemical resistance and superior water resistance and high Impact resistance compared to Ester Polyurethane. The diol-ester types excel in mechanical strength, low heat resistance, chemical resistance, superior Oil resistance and has 30〜100% more mechanical strength to Ether Polyurethane but does suffer from low impact resilience.

Polyurethane elastomers can be cross linked by isocyanate, peroxides and recently new types are available with a sulphur cure system.



Polyurethane elastomer applications take into account high mechanical properties and abrasion resistance. The combination of these characteristics suits products like seals, mountings, belts, round belts, suspensions, rolls, solid wheels covering stamps for ceramic industry. Polyurethane products are used in the automotive industry, chemical, automation, mining, textile,  and shipyards.


EMI ReferenceSpecificationHardness IRHDSGTensile Strength (MPa)Elongation at Break %Colour
312 - EU159Extra Low Impact15°1.020.6250Any
312 - EU309Commercial30°1.218.5600Any
312 – AU401Commercial40°1.219630Any
312 - AU502High Quality50°1.1527690Any
312 – AU601Commercial60°1.2121620Any
312 – AU701Commercial70°1.2131650Any
312 – EU701Low Impact70°1.0312250Any
312 – AU801Commercial80°1.2243610Any
312 – EU901Commercial90°1.1345530Any
312 – EU951Commercial95°1.1345400Any

Full data sheets for all grades are available on request.

* The information above is supplied in good faith and believed to be correct. This information is supplied upon the condition that persons receiving this will make their own determination as to its suitability for their purposes prior to use. EMI makes no representations or warranties, either expressed or implied with respect to the information or the product to which this information refers.