Patent ID: 8168724
Filing Date: 2012-05-01
Classification: C08C,C08F,C08G,C08L

Abstract:
1. A highly branched polyethylene comprising a narrow distribution of chain branch length and a precise placement of chain branches, wherein the highly branched polyethylene is produced by a convergent method for anionically synthesizing a highly branched well-defined 1 st generation polydiene comprising the following steps: reacting a diene monomer (d) with sec-diene-Li to form a single double-tailed macromonomer of (Pdd coupling two of said single double-tailed macromonomers of (Pdd reacting said double macromonomer of polydiene with said diene monomer and sec-diene-Li at said middle active center to form a 1 combining three or more of said 1 hydrogenating said highly branched well-defined 1 wherein said diene monomer is selected from the group consisting of butadiene, isoprene, 2-methyl-1,3-pentadiene, 2-ethyl-1,3-pentadiene, 2-propyl-1,3-pentadiene, 2-butyl-1,3-pentadiene, 2-pentyl-1,3-pentadiene, 2-hexyl-1,3-pentadiene, 2-ethyl-1,3-butadiene, 2-propyl-1,3-butadiene, 2-butyl-1,3-butadiene, 2-pentyl-1,3-butadiene, 2-hexyl-1,3-butadiene, 2,3-dimethyl-1,3-butadiene, 2,3-diethyl-1,3-butadiene, 2,3-dipropyl-1,3-butadiene, 2,3-dibutyl-1,3-butadiene, 2,3-dipentyl-1,3-butadiene, 2,3-dihexyl-1,3-butadiene, myrcene (7-methyl-3-methylene-1,6-octadiene) and 1,3 cyclohexadiene.