Patent ID: 7928178

Claim:
A pacifier comprised of a mouth portion having a projecting head and a base portion wherein the mouth portion is comprised of polyisoprene rubber, wherein the polyisoprene rubber is made by a process which comprises polymerizing and terminating the polymerization with an alkaline aqueous neutralizer solution, wherein the neodymium catalyst system is prepared by (1) reacting a neodymium carboxylate with an organoaluminum compound in the presence of isoprene for a period of about 10 minutes to about 30 minutes to produce neodymium-aluminum catalyst component, and (2) subsequently reacting the neodymium-aluminum catalyst component with a dialkyl aluminum chloride for a period of at least 30 minutes to produce the neodymium catalyst systemisoprene monomer in the presence of a neodymium catalyst system.