By Liz White, UT staffHorgen, Switzerland-As from 1 Dec 2005, or as contract terms allow, the Polyurethanes business of Dow Europe GmbH will further increase prices in Europe for toluene diisocyanate (TDI) by Euro 400 per tonne.Dow added that similar price increases are being implemented in the Middle East, Africa and the Indian subcontinent Dow claims to be the world's largest producer of polyether polyols, a leading producer of quality aromatic isocyanates, such as TDI and methylene diphenyl diisocyanate (MDI), and a major supplier of propylene oxide, an essential component of polyether polyols. "