The purpose of this report is to analyze developing technologies for the production of renewable polyurethanes, with a major focus on the feedstocks for polyurethanes—polyols and diisocyanates.  Technical and economic aspects of producing bio-based polyols and bio-based diisocyanates are explored in detail as well as some investigation of bio-based non-isocyanate routes to polyurethanes.  Production capacity developments, drivers for development, and commercialization obstacles are also explored.