<http://webisa.webdatacommons.org/prov/165608943> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/343452610> . <http://webisa.webdatacommons.org/343452610> <http://www.w3.org/ns/prov#wasQuotedFrom> <google.com> . <http://webisa.webdatacommons.org/343452610> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/343452610> <http://www.w3.org/ns/prov#value> "In either event, the blocks will be connected by a diisocyanate group and hence by a urethane linkage. [0215] The hydroxyl terminated polyethers contain repeat units having from 2 to about 6 and desirably from 2 to about 3 carbon atoms such as polyethylene oxide, polypropylene oxide, polybutylene oxide, and the like." .