PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The field of the invention also encompasses methods for making and using such compounds and plastics (such as PVC) blended with such compounds. [004] Background Phthalates (also called phthalate esters) are esters of phthalic acid (1,2-benzenedicarboxylic acid) and are mainly used as plasticizers (added to plastics to increase their flexibility, transparency, durability, and longevity).
http://www.w3.org/ns/prov#wasQuotedFrom
  • freepatentsonline.com