About: http://webisa.webdatacommons.org/206394347

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	A particularly preferred class of .alpha.-olefin copolymers are copolymers of propylene and .alpha.-butylene having a C.sub.3 component of from about 55 to about 90% be weight, and more especially from about 60 to about 85% by weight.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com