| http://www.w3.org/ns/prov#value | - Glycerol, trimethylolpropane and pentaerythritol, in particular trimethylolpropane and pentaerythritol, are preferred. [0029] The carboxyl components (a22) contained in the polyester polyol (a2) consist to an extent of 0 to 20 wt. % of at least one (cyclo)aliphatic monocarbox
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