prov:value
| - Examples of polyester polyol linking chains include, but are not limited to, polyalkylene glycols, such as polyethylene glycol, polypropylene glycol, polybutylene glycol, polytetramethylene glycol, hexanediol, neopentyl glycol, glycerin, trimethylolpropane, pentaerythritol, diglycerin, ditrimethylolpropane, dipentaerythritol, and the like which are modified by ??-caprolactone, ??-butyrolactone, ??
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