About: http://webisa.webdatacommons.org/153463101

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	there are natural rubber, neoprene, styrene butadiene rubber, polybutadiene rubber, polybutadiene, polyether urethanes with and without reinforcing fibers and fillers such as silica smoke, carbon black and the like.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com