| 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).
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