| http://www.w3.org/ns/prov#value | - phthalic acid, and a dihydric alcohol, such as ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol or dipropylene glycol; polyethers such as polyether polyols, e.g. polyethylene glycol, polypropylene glycol and polytetramethylene glycol that have a molecular weight of 500 or more, and even further 1,000 or more, and derivatives of these as obtainable by converting the hydroxyl
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