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<http://webisa.webdatacommons.org/176762875>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/176762875>	<http://www.w3.org/ns/prov#value>	"In general, polyurethane or polyisocyanurate foams are prepared by combining an isocyanate, the polyol premix composition, and other materials such as optional flame retardants, colorants, or other additives." .
<http://webisa.webdatacommons.org/prov/60573419>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/176762875> .