By Patrick Raleigh, UT On-line/news editorHorgen, Switzerland-Dow Chemical Co. is to raise European prices for its Pellethane-brand TPUs (thermoplastic polyurethane) elastomers and Isoplast TPU engineering resins by Euro300/tonne and Euro400/tonne, respectively. The increases to take effect from 10 June are primarily due to volatility in feedstock and energy prices, according to Dow."These price increases are a result of the continuing surge in energy and raw material prices over the last year. They will help in part to restore margin to more sustainable levels moving forward." said Markus Wildi, commercial vice president for Dow Plastics Europe, in a 27 May press statement."