CHEMICAL RESISTANCE AND HYDROLYTIC STABILITY
Different from other renewable polyols obtained from soy and castor oil, CNSL polyols have an aromatic structure that translates into excellent thermal resistance and chemical resistance to acid and alkaline solutions. Moreover, the combination of aromaticity and long aliphatic chain delivers hydrolytic stability and mechanical strength to CNSL based polyols.
Hydrolytic stability is a key benefit offered by CNSL diols. Prepolymers based on diols from different chemistries were immersed in 3 different solutions, water, sodium hydroxide, and sulfuric acid for 21 days at RT. The hardness was measured before and after exposure and the data in the graph indicates the change in hardness. All of Cardolite diols showed good performance compared to industry benchmarks such as aliphatic polycarbonate diol, PolyBD (MW 4000 Da) and PPG type diols. NX-9208 delivered the best overall performance followed by NX-9203, NX-9207, NX-9212 and NX-9201.