3- Ethyl-3-methylol-oxetane

A much more symmetric structure of hyperbranched polyols is obtained by using as monomer, an oxetane containing an hydroxyl group (produced industrially by Perstorp), 3-ethyl-3-methylol-oxetane, formally resulting from the intramolecular etherification of TMP (Figure 19.4). 

By polyaddition of 3-ethyl-3-methylol-oxetane to the hydroxyl group of TMP a dendritic polyol is obtained, with a hyperbranched and much more symmetrical structure compared to glycidol. In principle, the structure is very similar to the structure presented in the Figure 20.2 with the difference that the repeating unit is different (Figure 19.5) ... 

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