About: http://webisa.webdatacommons.org/298442578

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	P. S. Kempf in U.S. Pat. No. 4,267,088, issued May 12, 1981, claims advantages to using a mixture of epichlorhydrin-modified PEI and an ethylene oxide-modified PEI, which hardens on paper and other surfaces.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com