Global bio-based polyurethane market is expected to grow at a CAGR of 6.75% during 2016-2020. Among many natural oils, castor oil is primarily used for producing natural oil polyols due to the availability of ready hydroxyl group unlike other oils that require the introduction of hydroxyl group by other procedures.
Apart from adipic acid, bio-based succinic acid and 1,4 butanediol can be combined with the required isocyanates to produce polyurethanes with up to 70% bio content.