POLYMERS OF ISOPRENE FROM RENEWABLE RESOURCES

摘要

It has been found that certain cells in culture can convert carbon available in the cell culture medium into isoprene These cells have a heterologous nucleic acid which is operably linked to a promoter and encodes an isoprene synthase polypeptide The isoprene produced in such a cultured medium can then be recovered and polymenzed into synthetic rubbers and other useful polymepc matenals The synthetic isoprene containing polymers of this invention offer the benefit of being verifiable as to being denved from non- petrochemical based resources They can also be analytically distinguished from rubbers that come from natural sources The present invention more specifically discloses a polyisoprene polymer which is comprised of repeat units that are denved from isoprene monomer, wherein the polyisoprene polymer has delta 13C value of greater than -22%o This type of polyisoprene can be a as-1 A- polyisoprene homopolymer rubber.