| prov:value
| - In formula I, Y1 is an active hydrogen-free residue of a low molecular weight, initiator organic compound having a plurality of active hydrogen atoms (e.g. 2 or 3), such as a polyhydroxyalkane, polyaminoalkane, or polyether polyol, e.g., ethylene glycol, ethylene diamine, glycerol, or 1,1,1-trimethylolpropane. (RO)o is a hydrophilic poly(oxyalkylene) chain having a plurality of oxyethylene units a
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