FAQ: Are polyurethanes resistant to heat?

Heat resistance is rarely raised for casting polyurethane, because dynamic performance is the only disadvantage of urethane. Especially under the condition of high speed and high load, the build-up heat will destroy urethane quickly, that is why urethane is not used for car tire though abrasion resistance is much better than natural rubber.

In general, long term working temperature of normal polyurethane is no higher than 80 degree C.

Special formulations such as PPDI and NDI are usually used to avoid this disadvantage, short-term heat resistance can reach up to above 220°C, long-term exposure to temperatures above 180°, but cost is much expensive.

PEPSEN chemical engineering staff has been doing research and testing on this field in past 15 years and we have developed urethane formulations that can work for long time under 160 degree C, but the cost is much lower.