Natural oil polyols (NOPs) can be prepared from fatty acid methyl esters derived from seed oils utilizing a novel hydroformylation technology. The NOPs are saturated aliphatic polyester polyols and are water-white clear liquids, with very low viscosities at room temperature. These new polyols are renewable raw materials useful for the preparation of waterborne polyurethane dispersions (PUDs) with low volatile organic compound (VOC) content. NOP based PUDs, not containing N-methylpyrrolidinone (NMP free), provide coatings with superior physical properties (good hardness and abrasion resistance), excellent mechanical properties and exceptional hydrolytic and acid resistance.
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