The General Characteristics of Oligo-Polyols

An oligo-polyol for polyurethanes, may have two, three, four, five, six, seven or a maximum of eight hydroxyl groups/mol. Polyols with a higher number of hydroxyl groups/mol are rarely used (for example dendritic polyols). Oligo-polyols with only one hydroxyl groups/mol are present in all the polyether polyols based on propylene oxide (see Chapters 4.1.1-4.1.4). 

Irrespective of the chemical structure of the oligomeric chain, the oligo-polyols have general and common characteristics and these characteristics are determined by the same analytical methods. These first common elements permit an unitary and general point of view on all oligo-polyols for polyurethanes. 

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Several general properties, characteristic to classical macromolecular chemistry, are strongly linked to the polyurethane structure, as a direct consequence of the oligo-polyol structure - these are [1, 2, 5, 9, 11] ... 

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